Soluções de processamento de tecnologia avançada de extrusão de parafuso duplo de plásticos de engenharia e aplicações industriais

Com o rápido avanço da industrialização global, a demanda por materiais de alto desempenho na indústria automotiva, elétrica e eletrônica, construção, campos médicos e outros estão aumentando dia a dia. Plásticos de engenharia, como um material chave de alto desempenho, substituíram gradualmente materiais metálicos tradicionais e plásticos em geral em muitos cenários de aplicação principais devido às suas excelentes propriedades mecânicas, resistência ao calor, resistência à corrosão, estabilidade dimensional e processabilidade. A tecnologia de extrusão de parafuso duplo é a principal tecnologia de processamento de compostos plásticos de engenharia, e o desempenho do equipamento de extrusão determina diretamente a qualidade, eficiência de produção e efeito de aplicação de produtos plásticos de engenharia.

Estamos comprometidos em fornecer soluções profissionais de extrusão de parafuso duplo para processamento de plásticos de engenharia, contando com nossas extrusoras da série HTS desenvolvidas e fabricadas de forma independente com caixas de engrenagens de alto torque, que são especialmente projetados para as características de processamento e necessidades de aplicação de plásticos de engenharia. Este artigo irá elaborar de forma abrangente as características de desempenho, classificação, dificuldades de processamento de plásticos de engenharia, o papel central da tecnologia de extrusão de parafuso duplo no processamento de plásticos de engenharia, as vantagens de nossas extrusoras da série HTS e sua adaptação direcionada a plásticos de engenharia, bem como os campos de aplicação específicos, técnicas de processamento e problemas e soluções comuns. Complementando parâmetros técnicos detalhados, detalhes de processamento e casos de aplicação da indústria, o artigo será enriquecido para 3000-4000 palavras, fornecendo referência abrangente e profissional para empresas de processamento de plásticos de engenharia, técnicos e profissionais relevantes.

1. Visão geral da indústria de plásticos de engenharia e características básicas de desempenho

1.1 Situação Atual e Tendência de Desenvolvimento da Indústria de Plásticos de Engenharia

Os plásticos de engenharia referem-se a uma classe de materiais plásticos que podem ser usados ​​como materiais estruturais e suportam cargas mecânicas em uma ampla faixa de temperatura.. Comparado com plásticos em geral (como polietileno PE, polipropileno PP, cloreto de polivinila PVC), plásticos de engenharia têm desempenho abrangente mais excelente, e pode atender aos rigorosos requisitos de uso na produção industrial e na fabricação de produtos de alta qualidade. Nos últimos anos, impulsionado pela modernização de indústrias a jusante, como a indústria automóvel leve, inteligência elétrica e eletrônica, e dispositivos médicos de alta tecnologia, o mercado global de plásticos de engenharia tem mostrado uma tendência de crescimento constante e rápido.

De acordo com dados relevantes da indústria, o tamanho do mercado global de plásticos de engenharia excedeu 100 bilhões de dólares americanos, e espera-se que mantenha uma taxa composta de crescimento anual de 7%-10% nos próximos cinco anos. Entre eles, A Ásia-Pacífico é o maior mercado mundial de produção e consumo de plásticos de engenharia, contabilizando mais de 55% da participação no mercado global, principalmente devido ao rápido desenvolvimento da indústria automotiva, indústrias elétricas e eletrônicas na China, Índia e outros países, bem como a melhoria contínua da capacidade de apoio industrial e do nível de inovação tecnológica. China, como o maior consumidor e produtor mundial de plásticos de engenharia, tem uma enorme demanda de mercado, e a produção e o consumo anuais estão a crescer a uma taxa de dois dígitos, especialmente nas áreas de novos veículos energéticos, 5Comunicações G, e dispositivos médicos, a demanda por plásticos de engenharia de alto desempenho está apresentando uma tendência de crescimento explosiva.

A tendência de desenvolvimento da indústria de plásticos de engenharia reflete-se principalmente em cinco aspectos: primeiro, alto desempenho e funcionalização. Com a melhoria contínua dos requisitos de uso em campos a jusante, plásticos de engenharia estão se desenvolvendo em direção a maior resistência ao calor, maior resistência, melhor resistência ao desgaste e funções especiais (como retardador de chama, antiestático, antibacteriano, resistência à radiação), para se adaptar ao ambiente de trabalho severo de alta temperatura, alta pressão, corrosão e radiação; segundo, leve e integração. No setor automotivo, aeroespacial e outros campos, a fim de atingir metas de economia de energia e redução de emissões, plásticos de engenharia são cada vez mais usados ​​para substituir materiais metálicos, e a integração do design do produto está se tornando cada vez maior, o que pode reduzir o número de peças, simplificar o processo de produção e reduzir custos; terceiro, proteção ambiental e reciclabilidade. Com o fortalecimento das políticas globais de proteção ambiental e a melhoria da consciência de proteção ambiental, o desenvolvimento e aplicação de plásticos de engenharia recicláveis, plásticos de engenharia biodegradáveis ​​e tecnologias de processamento ecologicamente corretas tornaram-se o foco da indústria, reduzindo a poluição ambiental causada por resíduos de plástico; quarto, inteligência e precisão de equipamentos de processamento. Os plásticos de engenharia têm alta dificuldade de processamento e rigorosos requisitos de qualidade, que apresentam requisitos mais elevados para equipamentos de processamento. Inteligente, extrusoras de rosca dupla precisas e eficientes e linhas de produção automáticas tornaram-se a tendência dominante da indústria, realizando monitoramento em tempo real, ajuste automático de parâmetros e manutenção preditiva do processo de processamento; quinto, diversificação de campos de aplicação. Os plásticos de engenharia estão gradualmente se expandindo do setor automotivo tradicional, campos elétricos e eletrônicos para novas energias, médico, aeroespacial, construção e outros campos emergentes, abrindo novo espaço de mercado.

Contra este pano de fundo, tecnologia de extrusão de parafuso duplo, como a principal tecnologia de processamento de compostos plásticos de engenharia, tornou-se a chave para melhorar a competitividade das empresas de plásticos de engenharia. Os plásticos de engenharia são sensíveis ao superaquecimento e à degradação hidrolítica, e têm altos requisitos de temperatura de processamento, força de cisalhamento, tempo de residência e precisão do controle de temperatura. Nossas extrusoras da série HTS são especialmente projetadas para as características de processamento de plásticos de engenharia, com alto torque, alta velocidade, controle preciso de temperatura e excelente dispersibilidade, que pode efetivamente resolver as dificuldades de processamento de plásticos de engenharia e ajudar as empresas a alcançar alta qualidade, produção eficiente e estável.

1.2 Principais características de desempenho de plásticos de engenharia

Comparado com plásticos em geral e materiais metálicos, plásticos de engenharia têm desempenho abrangente e exclusivo, o que determina sua ampla aplicação em vários campos industriais. As principais características de desempenho dos plásticos de engenharia refletem-se principalmente nos cinco aspectos a seguir, que também apresentam requisitos especiais para sua tecnologia e equipamentos de processamento:

1.2.1 Excelente resistência ao calor e resistência ao frio

Os plásticos de engenharia têm uma ampla faixa de adaptação à temperatura, que pode manter boas propriedades mecânicas (força, resistência, dureza) em ambientes de alta e baixa temperatura. Comparado com plásticos em geral, que geralmente perdem suas propriedades mecânicas em 80-120℃, a maioria dos plásticos de engenharia pode funcionar de forma estável a 100-250 ℃, e alguns plásticos especiais de engenharia (como PEEK, PI) pode até trabalhar em temperaturas acima de 300 ℃. Ao mesmo tempo, plásticos de engenharia também têm boa resistência ao frio, que pode manter boa tenacidade em baixas temperaturas (abaixo de -40℃), e não são fáceis de fratura frágil. Este desempenho torna os plásticos de engenharia adequados para uso em ambientes com temperaturas severas, como peças de motores automotivos (alta temperatura) e equipamentos elétricos externos (baixa temperatura).

A excelente resistência ao calor dos plásticos de engenharia deve-se principalmente à sua estrutura molecular especial. (como anéis aromáticos, anéis heterocíclicos) e fortes forças intermoleculares, o que os torna difíceis de derreter e se decompor em altas temperaturas. No entanto, isso também traz certas dificuldades para o processamento: é necessária uma temperatura de processamento mais alta para fazê-los derreter e plastificar, e é necessário um controle preciso da temperatura para evitar a decomposição térmica.

1.2.2 Boa resistência à corrosão e durabilidade

Os plásticos de engenharia têm excelente estabilidade química e resistência à corrosão, e não são fáceis de serem corroídos por ácidos, álcalis, sais, solventes orgânicos e outros produtos químicos. Comparado com materiais metálicos, que são fáceis de enferrujar e corroer, plásticos de engenharia têm vida útil mais longa em ambientes químicos agressivos. Por exemplo, poliamida (PA) os plásticos de engenharia são resistentes à maioria dos solventes orgânicos e ácidos e álcalis fracos; policarbonato (PC) plásticos de engenharia são resistentes à corrosão por ácidos e sais não oxidantes; sulfeto de polifenileno (PPS) os plásticos de engenharia são resistentes à corrosão por quase todos os produtos químicos, exceto ácidos oxidantes fortes.

Além disso, plásticos de engenharia têm boa resistência às intempéries e ao envelhecimento, e não são fáceis de degradar e envelhecer sob a ação da luz solar, chuva, oxigênio e outros fatores ambientais, o que garante seu uso estável a longo prazo em ambientes externos e agressivos. Este desempenho faz com que os plásticos de engenharia sejam amplamente utilizados em equipamentos químicos, equipamento elétrico ao ar livre, peças exteriores automotivas e outros campos.

1.2.3 Fácil processamento e alta eficiência de produção

Comparado com materiais metálicos, plásticos de engenharia têm as vantagens de fácil processamento, processo de produção simples e alta eficiência de produção. Materiais metálicos geralmente precisam de procedimentos de processamento complexos, como forjamento, fundição, usinagem, que possuem alto consumo de energia, baixa eficiência e alto custo; enquanto os plásticos de engenharia podem ser processados ​​por extrusão, moldagem por injeção, moldagem por sopro e outros métodos, que pode realizar a produção em massa, simplificar o processo de produção, reduzir o consumo de energia e o custo de produção. Por exemplo, o ciclo de processamento de uma peça automotiva de plástico de engenharia por moldagem por injeção leva apenas alguns segundos a dezenas de segundos, enquanto o ciclo de processamento da mesma peça metálica pode levar de várias horas a vários dias.

No entanto, plásticos de engenharia também apresentam certas dificuldades de processamento: eles são sensíveis ao superaquecimento e à degradação hidrolítica, e são fáceis de decompor se a temperatura de processamento for muito alta ou o tempo de residência for muito longo; ao mesmo tempo, alguns plásticos de engenharia (como PA) tem alta absorção de água, o que afeta o efeito de processamento e a qualidade do produto. Portanto, é necessário usar equipamentos de processamento profissionais e técnicas de processamento científico para garantir a qualidade do processamento.

1.2.4 Excelente estabilidade dimensional e isolamento elétrico

Plásticos de engenharia têm boa estabilidade dimensional, e a taxa de encolhimento é pequena (geralmente 0.3%-1.5%) durante o processamento e uso, o que pode garantir a precisão dimensional dos produtos e evitar deformação. Este desempenho é particularmente importante para peças de alta precisão, como conectores elétricos, componentes automotivos de precisão, dispositivos médicos, etc.. A boa estabilidade dimensional dos plásticos de engenharia se deve principalmente à sua alta cristalinidade, baixa absorção de água (exceto algumas variedades como PA) e fortes forças intermoleculares.

Além disso, a maioria dos plásticos de engenharia tem excelente desempenho de isolamento elétrico, que pode manter um bom desempenho de isolamento em uma ampla faixa de temperatura e faixa de frequência, e não são fáceis de conduzir eletricidade e arco. Isso faz com que os plásticos de engenharia sejam amplamente utilizados nas áreas elétrica e eletrônica., como placas de fiação, abraçadeiras, conectores, relés, motores e outros componentes elétricos.

1.2.5 Peso leve e alta resistência específica, Excelente resistência ao desgaste

Os plásticos de engenharia têm características de peso leve (densidade é 1/3-1/5 de materiais metálicos) e alta resistência específica (a resistência por unidade de peso é equivalente ou até superior à dos materiais metálicos). Por exemplo, a resistência específica da poliamida reforçada com fibra de vidro (PA66+GF30) é superior ao do aço carbono comum, que pode efetivamente reduzir o peso dos produtos, garantindo ao mesmo tempo o desempenho mecânico. Este desempenho é particularmente importante no setor automotivo, aeroespacial e outros campos que buscam leveza e economia de energia, que pode reduzir o consumo de combustível e as emissões de carbono.

Ao mesmo tempo, plásticos de engenharia também têm excelente resistência ao desgaste e resistência ao atrito, e o coeficiente de atrito é pequeno, que pode ser usado na produção de peças resistentes ao desgaste (como engrenagens, rolamentos, blocos deslizantes) sem lubrificação adicional ou com menos lubrificação, reduzindo o custo de manutenção dos produtos. Por exemplo, polioximetileno (POM) plásticos de engenharia têm excelente resistência ao desgaste e são conhecidos como “aço plástico”, que é amplamente utilizado na produção de engrenagens automotivas, componentes elétricos e outras peças resistentes ao desgaste.

1.3 Classificação Comum de Plásticos de Engenharia

Engineering plastics can be divided into different types according to their chemical structure, performance level and application field. The common classification methods are as follows, which helps to better understand the processing characteristics and application scenarios of different engineering plastics, and select appropriate extrusion equipment and processing techniques:

1.3.1 Classification by Performance Level

According to the performance level, engineering plastics can be divided into general engineering plastics and special engineering plastics.

• General Engineering Plastics: They are the most widely used engineering plastics, with relatively mature production technology, moderate price and good comprehensive performance. The main varieties include polyamide (PA), policarbonato (PC), polioximetileno (POM), tereftalato de polietileno (BICHO DE ESTIMAÇÃO), polybutylene terephthalate (PBT), etc.. General engineering plastics are mainly used in automotive, elétrica e eletrônica, eletrodomésticos e outros campos, como peças automotivas, conectores elétricos, conchas de eletrodomésticos, etc..
• Plásticos Especiais de Engenharia: Eles têm desempenho mais excelente (como maior resistência ao calor, resistência à corrosão, propriedades mecânicas) do que plásticos de engenharia em geral, mas a tecnologia de produção é complexa e o preço é alto. As principais variedades incluem sulfeto de polifenileno (PPS), poliéter éter cetona (ESPIAR), poliimida (PI), polissulfona (fonte de alimentação), polietersulfona (PES), etc.. Plásticos especiais de engenharia são usados ​​principalmente em áreas de ponta, como aeroespacial, dispositivos médicos, nova energia, e equipamentos químicos, como componentes aeroespaciais, implantes médicos, componentes elétricos resistentes a altas temperaturas, etc..

1.3.2 Classificação por Estrutura Química

De acordo com a estrutura química da cadeia molecular, plásticos de engenharia podem ser divididos em poliamida (PA), policarbonato (PC), polioximetileno (POM), poliéster (BICHO DE ESTIMAÇÃO, PBT), sulfeto de polifenileno (PPS), poliéter éter cetona (ESPIAR), etc.. Cada tipo de plástico de engenharia tem suas próprias características de desempenho e requisitos de processamento exclusivos.:

• Poliamida (PA): Também conhecido como náilon, it has excellent mechanical strength, resistência ao desgaste, toughness and chemical resistance, but has high water absorption, which affects the dimensional stability. Common varieties include PA6, PA66, PA11, PA12, etc.. It is widely used in automotive parts (engrenagens, rolamentos, intake manifolds), conectores elétricos, textile fibers, etc..
• Policarbonato (PC): It has excellent transparency, resistência ao impacto, heat resistance and electrical insulation, but has poor wear resistance and is easy to scratch. It is widely used in electrical and electronic fields (wiring boards, lamp covers), automotive fields (headlamp lenses, instrument panels), medical fields (medical containers), etc..
• Polioximetileno (POM): It has excellent wear resistance, friction resistance, dimensional stability and mechanical strength, and is not easy to absorb water. It is known as “aço plástico” and is widely used in automotive parts (engrenagens, blocos deslizantes), componentes elétricos (interruptores, rolamentos), peças mecânicas, etc..
• Polyester (BICHO DE ESTIMAÇÃO, PBT): PET has excellent transparency, heat resistance and mechanical strength, and is mainly used in fibers, filmes, garrafas e outros campos; PBT tem excelente resistência química, isolamento elétrico e fluidez de processamento, e é amplamente utilizado em campos elétricos e eletrônicos (conectores, relés), peças automotivas, etc..
• Sulfeto de Polifenileno (PPS): Possui excelente resistência ao calor (temperatura de uso a longo prazo até 200-220 ℃), resistência à corrosão, retardador de chama e isolamento elétrico, mas tem pouca resistência. É amplamente utilizado em componentes elétricos resistentes a altas temperaturas, peças de motor automotivo, equipamento químico, etc..
• Poliéter Éter Cetona (ESPIAR): Tem excelente desempenho abrangente, temperatura de uso a longo prazo até 250-300 ℃, boa resistência à corrosão, resistência mecânica e biocompatibilidade. É usado principalmente em campos de ponta, como aeroespacial, implantes médicos, e componentes elétricos resistentes a altas temperaturas.

1.3.3 Classificação por Campo de Aplicação

De acordo com o campo de aplicação, plásticos de engenharia podem ser divididos em plásticos de engenharia de nível automotivo, electrical-grade engineering plastics, medical-grade engineering plastics, aerospace-grade engineering plastics, etc.. Different application fields have different requirements on the performance of engineering plastics. Por exemplo, automotive-grade engineering plastics require good heat resistance, impact strength and weather resistance; electrical-grade engineering plastics require good electrical insulation and flame retardancy; medical-grade engineering plastics require good biocompatibility and sterility; aerospace-grade engineering plastics require good high-temperature resistance, low weight and high strength.

2. Core Processing Technology of Engineering Plastics: Twin-Screw Extrusion Technology

Engineering plastics processing mainly includes extrusion, moldagem por injeção, moldagem por sopro, molding and other methods, among which twin-screw extrusion technology is the core technology for the production of engineering plastic compounds (such as modified engineering plastics, reinforced engineering plastics) and semi-finished products (such as pipes, folhas, fibers). Compared with single-screw extrusion technology, twin-screw extrusion technology has the advantages of strong shearing force, bom efeito de mistura, controle preciso de temperatura, short residence time and strong adaptability to raw materials, which can effectively solve the processing difficulties of engineering plastics (such as sensitivity to overheating and hydrolytic degradation, poor mixing effect, low processing efficiency) and ensure the quality of engineering plastic products.

2.1 Processing Difficulties of Engineering Plastics and Requirements for Extrusion Equipment

Como mencionado anteriormente, engineering plastics have excellent comprehensive performance, mas a sua dificuldade de processamento também é maior do que a dos plásticos em geral, principalmente devido à sua estrutura molecular especial e características de desempenho. As principais dificuldades de processamento de plásticos de engenharia e os requisitos correspondentes para equipamentos de extrusão são os seguintes:

2.1.1 Sensibilidade ao Superaquecimento e Degradação Hidrolítica

A maioria dos plásticos de engenharia (como PA, PBT, PPS) são sensíveis ao superaquecimento e à degradação hidrolítica. Se a temperatura de processamento for muito alta ou o tempo de residência na extrusora for muito longo, a cadeia molecular do plástico de engenharia irá quebrar, resultando em decomposição térmica, o que reduzirá as propriedades mecânicas, resistência ao calor e outro desempenho do produto, e até causar descoloração, carbonização e outros defeitos. Além disso, alguns plásticos de engenharia (como PA) tem alta absorção de água, and the moisture in the material will cause hydrolytic degradation during the high-temperature processing process, affecting the product quality.

This puts forward two key requirements for extrusion equipment: primeiro, precise temperature control capacity, which can strictly control the processing temperature within the optimal range of engineering plastics, avoid local overheating, and the temperature control precision should reach ±1℃; segundo, short residence time, which can reduce the time that the material stays in the extruder barrel, avoid thermal decomposition and hydrolytic degradation. Twin-screw extruders have the advantages of short residence time (geralmente 1-5 minutos) e controle preciso de temperatura, which are more suitable for engineering plastics processing than single-screw extruders (tempo de residência 5-10 minutos).

2.1.2 High Requirements on Mixing and Dispersing Effect

In engineering plastics processing, it is often necessary to add modifiers (such as glass fiber, fibra de carbono, talco, retardadores de chama, compatibilizantes) to improve the performance of the product (such as reinforcing, toughening, retardador de chama). Por exemplo, adding glass fiber to PA can improve its strength and dimensional stability; adding flame retardants to PBT can improve its flame retardancy. The uniform mixing and dispersion of modifiers in the engineering plastic matrix is crucial to the performance of the final product. If the mixing and dispersing effect is poor, the modifiers will agglomerate, resulting in uneven performance of the product, and even reduce the mechanical properties of the product.

This requires the extrusion equipment to have strong shearing force and mixing capacity. Twin-screw extruders adopt intermeshing co-rotating or counter-rotating twin-screw structure, and the relative movement between the screws can generate strong shear force and kneading force, which can fully break the agglomerates of modifiers, make the modifiers uniformly dispersed in the engineering plastic matrix, and ensure the mixing and dispersing effect. Além disso, the modular design of the twin-screw can freely combine different screw elements (como transportar elementos, misturando elementos, elementos de corte) according to the type of engineering plastic and modifier, further improving the mixing and dispersing effect.

2.1.3 High Requirements on Wear Resistance of Equipment

In the processing of reinforced engineering plastics (such as glass fiber reinforced PA, carbon fiber reinforced PPS), the added glass fiber, carbon fiber and other modifiers have high hardness, which will cause serious wear to the screw and barrel of the extruder during the extrusion process. Se o parafuso e o cilindro tiverem baixa resistência ao desgaste, eles serão usados ​​rapidamente, resultando em força de cisalhamento reduzida e capacidade de mistura da extrusora, afetando a qualidade do produto e reduzindo a vida útil do equipamento.

Isto exige que o parafuso e o cilindro da extrusora sejam feitos de materiais resistentes ao desgaste de alta qualidade e processados ​​por tecnologia de fabricação avançada. Nossas extrusoras da série HTS adotam liga de aço resistente ao desgaste importada para parafuso e cilindro, e passar por tratamento compósito bimetálico ou tratamento de revestimento a laser, o que melhora muito a resistência ao desgaste e à corrosão do parafuso e do cilindro, e pode se adaptar ao processamento de plásticos de engenharia reforçados com modificadores de alta dureza.

2.1.4 Altos requisitos de fluidez de processamento e controle de pressão

Alguns plásticos de engenharia (como o PPS, ESPIAR) têm alta viscosidade e baixa fluidez de processamento, que exigem que a extrusora tenha forte capacidade de transporte e capacidade de controle de pressão para garantir o bom andamento da extrusão. Se a capacidade de transporte for insuficiente ou o controle de pressão for instável, it will cause uneven extrusion speed, unstable product size, and even equipment blockage.

Twin-screw extruders have strong conveying capacity and stable pressure control capacity. The intermeshing of the twin screws can generate strong pumping force, which can effectively convey high-viscosity engineering plastic materials; ao mesmo tempo, the extruder is equipped with a high-precision pressure sensor, which can monitor the extrusion pressure in real time and adjust the screw speed and feeding speed automatically to ensure the stability of the extrusion pressure and the smooth progress of processing.

2.2 Working Principle and Process Flow of Engineering Plastics Twin-Screw Extrusion

The twin-screw extrusion process of engineering plastics is a complex physical and chemical process, que envolve a interação de vários fatores, como temperatura, pressão, força de cisalhamento e tempo. The core purpose is to melt and plasticize the engineering plastic raw materials and modifiers, mix them uniformly, and then extrude them into the required shape (such as particles, tubos, folhas, fibers) through the die head. O princípio de funcionamento específico e o fluxo do processo são os seguintes:

2.2.1 Pré-tratamento de matérias-primas

Raw material pretreatment is the foundation of engineering plastics extrusion processing, which directly affects the processing effect and product quality. The raw materials of engineering plastics mainly include engineering plastic resin (como PA, PC, POM), modifiers (such as glass fiber, fibra de carbono, talco, retardadores de chama), compatibilizantes, lubricants and other additives. The pretreatment steps are as follows:

• Drying Treatment: A maioria dos plásticos de engenharia (como PA, PBT, PPS) tem alta absorção de água, and the moisture in the raw materials will cause hydrolytic degradation during high-temperature processing, resulting in product defects (such as bubbles, rachaduras, reduced mechanical properties). Portanto, the raw materials must be dried before processing. The drying temperature and time are determined according to the type of engineering plastic: por exemplo, PA6 is dried at 80-100℃ for 4-6 horas, PA66 is dried at 100-120℃ for 6-8 horas, PBT is dried at 120-140℃ for 2-4 horas, PPS is dried at 150-160℃ for 3-5 horas. The moisture content of the dried raw materials should be controlled below 0.1%-0.2%.
• Premixing Treatment: According to the formula ratio, the dried engineering plastic resin, modifiers and additives are put into a high-speed mixer for premixing. The purpose of premixing is to make the modifiers and additives uniformly adhere to the surface of the resin particles, improve the mixing effect during extrusion, and avoid local agglomeration of modifiers. The mixing speed is generally 800-1200 rpm, and the mixing time is 5-10 minutos. For some modifiers with poor compatibility (such as glass fiber and PA), a compatibilizer should be added during premixing to improve the compatibility between the modifier and the resin.
• Crushing and Sieving: For engineering plastic resins with large particle size or modifiers with uneven particle size (such as glass fiber), crushing and sieving treatment should be carried out to ensure the uniformity of raw materials and avoid affecting the mixing and dispersing effect during extrusion. The particle size of the crushed raw materials should be controlled at 20-40 malha.

2.2.2 Alimentação e Transporte

The premixed raw materials are sent to the feeding hopper of the twin-screw extruder through a screw feeder or a belt feeder. The feeding device of the extruder is usually equipped with a frequency conversion speed regulation function, which can adjust the feeding speed according to the screw speed and extrusion speed to ensure that the materials enter the extrusion cavity stably and uniformly, avoiding material accumulation or insufficient feeding. The feeding hopper is also equipped with a drying device to prevent the raw materials from absorbing moisture again during feeding.

2.2.3 Fusão, Mixing and Shearing

The materials entering the extrusion cavity of the twin-screw extruder are pushed forward continuously by the rotating screws. The extrusion cavity is composed of a screw and a barrel, e o volume da cavidade de extrusão diminui gradualmente ao longo da direção do eixo. Quando os parafusos giram, os materiais são gradualmente comprimidos sob a ação dos parafusos e do cano, e a pressão na cavidade de extrusão aumenta gradualmente (generally 5-15MPa).

Ao mesmo tempo, os materiais são submetidos a forte força de cisalhamento e força de atrito gerada pelo movimento relativo entre os parafusos e o cilindro, bem como entre os voos de parafuso. The shear force and friction force can fully break the agglomerates of modifiers, make the modifiers uniformly dispersed in the melted engineering plastic resin, and promote the fusion and compatibility between the modifier and the resin. A força de atrito também pode gerar uma certa quantidade de calor, which is combined with the external heating of the barrel (electric heating or steam heating) to make the engineering plastic resin gradually melt and plasticize.

The barrel of the extruder is usually divided into 4-6 temperature control sections (feeding section, melting section, mixing section, homogenizing section, seção de cabeça de matriz), and the temperature of each section is precisely controlled according to the type of engineering plastic. Por exemplo, when processing PA66+GF30 (glass fiber reinforced PA66), the temperature of the feeding section is 120-140℃, the melting section is 250-260℃, the mixing section is 260-270℃, the homogenizing section is 250-260℃, and the die head section is 240-250℃. The precise temperature control can ensure that the resin is fully melted without thermal decomposition, and the modifiers are uniformly dispersed.

2.2.4 Extrusion and Shaping

The fully melted, mixed and dispersed material is pushed to the die head of the extruder by the screws. The die head is designed according to the shape of the final product: for the production of engineering plastic compounds (grânulos), the die head is equipped with multiple circular die holes (the number and size of die holes are determined according to the particle size of the granules); for the production of pipes, folhas, fibers, the die head is designed into corresponding shapes (such as circular die for pipes, flat die for sheets).

The material is extruded from the die head at a high speed to form continuous semi-finished products (such as strips for granules, tubos, folhas). The temperature of the die head is slightly lower than that of the homogenizing section, which can prevent the material from decomposing due to excessive temperature and ensure the shaping effect of the semi-finished products. The extrusion speed is controlled according to the type of engineering plastic and the shape of the product, generally ranging from 0.5-5m/min.

2.2.5 Cooling and Solidification

The extruded semi-finished products are sent to a cooling device for rapid cooling and solidification. The cooling method is determined according to the shape of the product: for strips (granule production), water tank cooling is usually used, and the cooling water temperature is controlled at 20-30℃, and the cooling time is 2-5 minutos; for pipes and sheets, air cooling or water spray cooling is used, and the cooling speed should be controlled to avoid product deformation due to uneven cooling. Rapid cooling can make the semi-finished products solidify quickly, maintain the shape and size of the products, and improve the mechanical properties of the products.

2.2.6 Cutting and Post-Processing

After cooling and solidification, the semi-finished products are processed into the final product through cutting or other post-processing steps. For the production of engineering plastic compounds (grânulos), the cooled strips are sent to a granulator for cutting, and the granulator is equipped with a rotary knife, which can cut the strips into granular products with uniform size (the particle size is generally 2-5mm, which can be adjusted according to customer needs). For the production of pipes and sheets, the cooled semi-finished products are cut into the required length through a cutting machine; for the production of fibers, the cooled filaments are drawn and wound to form fiber products.

Além disso, the final product also needs to undergo post-processing steps such as screening, inspection and packaging. The screening step is to remove unqualified products (such as too large, too small or agglomerated particles); the inspection step is to detect the performance (such as mechanical strength, resistência ao calor, precisão dimensional) of the product to ensure that it meets the customer’s requirements; the packaging step is to package the qualified product in a sealed and moisture-proof manner to prevent the product from absorbing moisture and affecting the quality.

2.3 Key Factors Affecting Engineering Plastics Twin-Screw Extrusion Effect

The effect of twin-screw extrusion directly affects the quality and performance of engineering plastic products. There are many factors affecting the extrusion effect, incluindo principalmente características da matéria-prima, formula ratio, premixing effect, parâmetros de extrusão e estrutura da cabeça de rosca. Mastering these key factors and making scientific adjustments can ensure the stability of the extrusion effect and the consistency of product quality.

2.3.1 Raw Material Characteristics

The type, particle size, moisture content and purity of raw materials have a great impact on the extrusion effect. Por exemplo, the particle size of engineering plastic resin and modifiers should be uniform; if the particle size is uneven, it will lead to uneven melting and mixing of materials. The moisture content of raw materials must be strictly controlled below 0.1%-0.2%; if the moisture content is too high, it will cause hydrolytic degradation of the material and bubbles in the product. A pureza das matérias-primas também é muito importante; impurezas em matérias-primas (such as metals, stones, pó) will not only affect the product quality, mas também desgaste o parafuso e o cilindro da extrusora, e até mesmo causar bloqueio de equipamentos.

2.3.2 Razão de fórmula

The formula ratio of engineering plastic compounds (the ratio of resin, modifiers and additives) is the key to determining the performance of the product. The type and dosage of modifiers should be determined according to the performance requirements of the product. Por exemplo, adicionando 20%-40% of glass fiber to PA can significantly improve its strength and dimensional stability, but excessive glass fiber will reduce the toughness and processing fluidity of the product. The type and dosage of additives also need to be reasonably matched: compatibilizers can improve the compatibility between modifiers and resin, and the dosage is generally 0.5%-2%; lubricants can reduce the friction between materials and equipment, melhorar a fluidez do processamento, and the dosage is generally 0.3%-1%; antioxidants can prevent the material from thermal oxidation degradation during processing, and the dosage is generally 0.1%-0.5%.

2.3.3 Premixing Effect

Premixing is the foundation of extrusion processing. The uniformity of premixing directly affects the mixing and dispersing effect of modifiers during extrusion. If the premixing is uneven, the modifiers cannot be uniformly adhered to the surface of the resin, resulting in local agglomeration of modifiers, uneven mixing of materials during extrusion, and reduced product performance. To ensure the premixing effect, it is necessary to control the mixing speed, mixing time and mixing temperature: the mixing speed is 800-1200 rpm, the mixing time is 5-10 minutos, and the mixing temperature is controlled at 40-60℃ (appropriate temperature can improve the adhesion of additives and promote uniform mixing).

2.3.4 Parâmetros de extrusão

Extrusion parameters are the most important factors affecting the extrusion effect, incluindo principalmente a velocidade do parafuso, temperatura de extrusão e pressão de extrusão.

• Velocidade do parafuso: The screw speed of twin-screw extruders for engineering plastics generally ranges from 100 para 1000 rpm. Our HTS series extruders can reach a maximum speed of 1000 rpm. Quanto maior a velocidade do parafuso, maior será a força de cisalhamento e a força de atrito recebida pelos materiais, the better the mixing and dispersing effect of modifiers, and the higher the production efficiency. No entanto, se a velocidade do parafuso for muito alta, o tempo de residência dos materiais na cavidade de extrusão é muito curto, resulting in incomplete melting of the resin, insufficient mixing of materials, and uneven product quality; if the screw speed is too low, the shear force and friction force are insufficient, the modifiers cannot be fully dispersed, and the production efficiency is low. The screw speed should be adjusted according to the type of engineering plastic and the type of modifier: for high-viscosity engineering plastics (como o PPS, ESPIAR), a lower screw speed is needed to ensure sufficient melting and mixing; for reinforced engineering plastics (such as glass fiber reinforced PA), a higher screw speed is needed to ensure the uniform dispersion of glass fiber.
• Temperatura de extrusão: The extrusion temperature is the key to ensuring the melting and plasticization of engineering plastics. The temperature of each section of the barrel and die head must be precisely controlled according to the type of engineering plastic. A temperatura da seção de alimentação é mais baixa (slightly higher than the drying temperature of the raw materials), que é principalmente para evitar que os materiais endureçam e garantir uma alimentação suave; a temperatura da seção de fusão é média, which is mainly to promote the melting and plasticization of the resin; a temperatura da seção de mistura é mais alta, which is mainly to enhance the shear and mixing effect, and promote the uniform dispersion of modifiers; the temperature of the homogenizing section is slightly lower than the mixing section, which is mainly to ensure the uniform temperature and viscosity of the materials, and avoid thermal decomposition; the temperature of the die head section is slightly lower than the homogenizing section, which is to ensure the shaping effect of the semi-finished products. The temperature control precision should reach ±1℃ to avoid local overheating and thermal decomposition of the material.
• Pressão de Extrusão: The extrusion pressure of engineering plastics twin-screw extrusion generally ranges from 5 to 15MPa. The pressure in the extrusion cavity is mainly determined by the compression ratio of the screw, the die hole size and the screw speed. The higher the extrusion pressure, the better the mixing and dispersing effect of materials, and the denser the product. No entanto, if the pressure is too high, it will increase the energy consumption and wear of the equipment, and even cause the die head to block; if the pressure is too low, the materials cannot be fully compressed and mixed, the product is loose, and the performance is unstable. The extrusion pressure should be adjusted according to the type of engineering plastic and the shape of the product: for high-viscosity materials and products with small die holes, a higher extrusion pressure is needed.

2.3.5 Die Head Structure

The die head structure mainly includes the shape, size and number of die holes, which directly affects the shaping effect and quality of the product. For the production of engineering plastic compounds (grânulos), the die head should be equipped with multiple uniform die holes, and the size of the die holes should be matched with the particle size of the product; for the production of pipes and sheets, the die head should be designed according to the shape and size of the product, and the flow channel of the die head should be smooth to avoid material accumulation and local overheating. The die head should also be equipped with a temperature control device to ensure the uniform temperature of the die head and the stable shaping of the product.

3. Our HTS Series Extruders: Professional Solutions for Engineering Plastics Processing

Há muito tempo estamos engajados na pesquisa, development and production of high-performance twin-screw extruders, and have accumulated rich experience in the field of engineering plastics processing. De acordo com as características de processamento de plásticos de engenharia (sensibilidade ao superaquecimento e degradação hidrolítica, altos requisitos em efeito de mistura e dispersão, alta viscosidade) e necessidades de aplicação, desenvolvemos as extrusoras de rosca dupla da série HTS especialmente para processamento de plásticos de engenharia. Nossas extrusoras da série HTS adotam caixas de engrenagens de alto torque, com torque específico de 14Nm/cm³ e velocidade máxima de até 1000rpm, que pode obter maior produção, menor tempo de residência, melhor dispersibilidade e controle de temperatura mais preciso, adaptando-se perfeitamente às necessidades de processamento de vários plásticos de engenharia.

3.1 Principais vantagens das extrusoras da série HTS para processamento de plásticos de engenharia

3.1.1 Alto torque e alta velocidade, Alta eficiência de produção

Os plásticos de engenharia têm alta viscosidade e baixa fluidez de processamento, which require the extruder to have strong torque and conveying capacity. Our HTS series extruders adopt high-torque gearboxes independently developed and manufactured by us (HTS PLUS series and HTS SUPER series) or imported from leading European manufacturers (HTS BASIC series), with a specific torque of 14Nm/cm³, which is much higher than that of ordinary twin-screw extruders (general torque is 8-12Nm/cm³). The high torque design ensures that the extruder can stably convey high-viscosity engineering plastic materials, avoid material accumulation and equipment blockage, and improve the stability of the extrusion process.

Ao mesmo tempo, the HTS series extruders have a high speed design, with a maximum speed of up to 1000rpm. The high speed can generate strong shear force and mixing force, which can fully break the agglomerates of modifiers, make the modifiers uniformly dispersed in the resin matrix, and improve the mixing and dispersing effect. Além disso, the high speed design also greatly improves the production efficiency: compared with ordinary extruders, the production efficiency of HTS series extruders can be increased by 30%-50%, which can meet the large-scale production needs of engineering plastics enterprises.

3.1.2 Short Residence Time, Effectively Avoiding Thermal Degradation

As engineering plastics are sensitive to overheating and hydrolytic degradation, the residence time of materials in the extruder is crucial. Our HTS series extruders adopt an optimized screw structure and barrel design, with a short residence time of only 1-3 minutos, which is much shorter than that of ordinary twin-screw extruders (5-10 minutos) and single-screw extruders (10-15 minutos). The short residence time can effectively reduce the contact time between the material and high temperature, avoid thermal decomposition and hydrolytic degradation of the material, and ensure the mechanical properties and heat resistance of the product.

Além disso, the screw of the HTS series extruders adopts a modular design, and different screw elements can be freely combined according to the type of engineering plastic, which can further adjust the residence time of the material, ensuring that different types of engineering plastics can obtain the optimal residence time during processing.

3.1.3 Precise Temperature Control, Stable Performance

The HTS series extruders adopt an advanced intelligent temperature control system, which can realize precise control of the temperature of each section of the barrel and the die head. A precisão do controle de temperatura pode atingir ±1℃, which can strictly control the processing temperature within the optimal range of engineering plastics, evite superaquecimento local e decomposição térmica do material. O sistema de controle de temperatura está equipado com uma função de monitoramento e alarme em tempo real: se a temperatura de qualquer seção exceder a faixa definida, o sistema emitirá um aviso de alarme a tempo, e até ajustar automaticamente a potência de aquecimento ou desligar o equipamento se necessário, para evitar falhas no equipamento e problemas de qualidade do produto.

Além disso, o cilindro das extrusoras da série HTS adota um design de revestimento de camada dupla, que pode realizar aquecimento e resfriamento rápidos, e melhorar a velocidade de resposta do controle de temperatura. A cabeça de roscar também está equipada com um dispositivo independente de controle de temperatura, o que garante a temperatura uniforme da cabeça de rosca e a modelagem estável do produto.

3.1.4 Excellent Mixing and Dispersing Effect

The HTS series extruders adopt an intermeshing co-rotating twin-screw structure, com um passo de parafuso razoável, projeto de taxa de avanço e compressão. The intermeshing and rotating of the twin screws can generate strong shear force and kneading force, which can fully break the agglomerates of modifiers (such as glass fiber, fibra de carbono, talco), make the modifiers uniformly dispersed in the engineering plastic resin matrix, and ensure the mixing and dispersing effect. The mixing uniformity of the HTS series extruders can reach more than 95%, which is much higher than that of ordinary twin-screw extruders (85%-90%).

The screw of the HTS series extruders adopts a modular design, and different types of screw elements (como transportar elementos, misturando elementos, elementos de corte) can be freely combined according to the type of engineering plastic and modifier. Por exemplo, when processing reinforced engineering plastics with glass fiber, more shearing elements can be configured to enhance the shearing effect and ensure the uniform dispersion of glass fiber; when processing engineering plastics with high viscosity (como o PPS), more mixing elements can be configured to improve the mixing effect and ensure the uniform viscosity of the material.

3.1.5 Alta resistência ao desgaste, Longa vida útil

In the processing of reinforced engineering plastics (such as glass fiber reinforced PA, carbon fiber reinforced PPS), the added modifiers have high hardness, which will cause serious wear to the screw and barrel of the extruder. Our HTS series extruders adopt high-quality wear-resistant materials and advanced manufacturing technology to ensure the wear resistance of the core components.

The screw and barrel of the HTS series extruders are made of imported wear-resistant alloy steel (such as 38CrMoAlA), e passar por tratamento compósito bimetálico ou tratamento de revestimento a laser. The surface hardness of the screw and barrel can reach ≥65 HRC (HTS BASIC series) and ≥70 HRC (HTS PLUS series and HTS SUPER series), which has extremely strong wear resistance and corrosion resistance, and can effectively resist the wear caused by high-hardness modifiers. This greatly extends the service life of the screw and barrel: the service life of the screw and barrel of the HTS series extruders is 2-3 times that of ordinary extruders, reducing the frequency of component replacement and the maintenance cost of the equipment.

Além disso, we also provide professional wear detection services for the screw and barrel. Our technical team will regularly detect the wear degree of the screw and barrel for customers, issue a detailed wear report, and put forward targeted replacement and maintenance suggestions, garantindo que os clientes só substituam componentes quando necessário, evitando desperdícios desnecessários.

3.1.6 Wide Application Range, Strong Flexibility

The HTS series extruders have a wide application range, which can adapt to the processing needs of various engineering plastics, including general engineering plastics (PA, PC, POM, BICHO DE ESTIMAÇÃO, PBT) and special engineering plastics (PPS, ESPIAR, fonte de alimentação, PES). The extruders can also adapt to the processing of various modified engineering plastics, such as reinforced engineering plastics (glass fiber reinforced, carbon fiber reinforced), toughened engineering plastics, flame-retardant engineering plastics, antistatic engineering plastics, etc..

The modular design of the HTS series extruders (parafuso, barril, morrer cabeça, etc.) makes the replacement of components more convenient and quick. When customers need to adjust the product type (such as switching from PA processing to PPS processing) or modify the formula, they only need to replace the corresponding components, sem substituir todo o equipamento, which reduces the cost of equipment transformation and improves the flexibility and adaptability of the equipment. Além disso, the HTS series extruders can also be matched with different auxiliary equipment (como misturadores de alta velocidade, dryers, coolers, granulators, screening machines, packaging machines) to form a complete automatic production line, realizing continuous production from raw material pretreatment to product packaging.

3.1.7 Intelligent Control, Easy Operation and Maintenance

The HTS series extruders adopt a PLC intelligent control system and a touch screen operation interface, que é simples e intuitivo, fácil de operar. O sistema pode armazenar vários conjuntos de fórmulas de produtos e parâmetros de processamento. When customers produce different types of engineering plastics, eles só precisam chamar a fórmula e os parâmetros correspondentes, sem depuração repetida, o que economiza tempo e melhora a eficiência da produção.

The system is also equipped with a real-time monitoring function, which can monitor the key parameters of the extrusion process (such as temperature, pressão, velocidade do parafuso, velocidade de alimentação) in real time, and record the production data (such as output, processing time) for later query and analysis. For the HTS SUPER series extruders, we also provide a cloud control function, which can realize remote parameter adjustment, production data monitoring and predictive maintenance of equipment, realizing intelligent production management.

Além disso, the HTS series extruders adopt a reasonable structural design, which makes the maintenance more convenient. O parafuso, barril, a cabeça da matriz e outros componentes podem ser desmontados e montados rapidamente, o que reduz o tempo de manutenção e a intensidade do trabalho. Nossa equipe de serviço pós-venda fornecerá instalação profissional, serviços de comissionamento e treinamento para clientes, garantindo que os clientes possam usar o equipamento sem problemas.

3.2 HTS Series Extruder Product Types and Their Adaptation to Engineering Plastics

In order to meet the diverse processing needs of engineering plastics enterprises of different scales and product types, we have launched three main product types in the HTS series: HTS BASIC series, HTS PLUS series and HTS SUPER series. Each series has its own characteristics and targeted adaptation scenarios, which can be selected by customers according to their own production scale, product type, budget and other factors.

3.2.1 HTS BASIC Series Extruders: Flexible and Cost-Effective Choice for General Engineering Plastics

The HTS BASIC series extruders are a cost-effective product series designed for engineering plastics processing enterprises with medium and small production scales or initial entry into the industry. This series of extruders uses medium-torque gearboxes from leading European manufacturers, which have the advantages of stable performance, baixo ruído, high efficiency and long service life. The medium-torque design (specific torque 10-12Nm/cm³) can meet the processing needs of most general engineering plastics (such as PA6, PA66, POM, BICHO DE ESTIMAÇÃO, PBT) and low-to-medium modified engineering plastics (such as glass fiber reinforced PA with filling amount ≤30%).

Em termos de projeto estrutural, the HTS BASIC series extruders adopt a twin-screw parallel co-rotating structure, with a screw diameter ranging from 30mm to 65mm, and a compression ratio of 4～8, which can be adjusted according to the type of engineering plastic. The barrel is made of wear-resistant alloy steel with nitriding treatment, and the screw is made of wear-resistant and corrosion-resistant alloy steel, which has good wear resistance. The extruder is equipped with a PLC control system and a touch screen operation interface, which can realize automatic feeding, automatic temperature control, automatic pressure control and automatic cutting, and is simple and easy to operate.

The production capacity of the HTS BASIC series extruders ranges from 100kg/h to 500kg/h, which is suitable for medium and small-sized engineering plastics processing enterprises that mainly produce general engineering plastics and low-to-medium modified engineering plastics. Uma das maiores vantagens desta série é que ela pode oferecer opções flexíveis através de diferentes combinações de configurações. Os clientes podem escolher diferentes elementos de parafuso, morrer cabeças, dispositivos de alimentação, dispositivos de secagem e equipamentos de pós-processamento de acordo com seus próprios tipos de produtos, capacidade de produção e orçamento, de modo a formar uma linha de produção adequada às suas próprias necessidades. The HTS BASIC series extruders have a reasonable price, which can help enterprises reduce the initial investment cost.

3.2.2 Extrusoras da série HTS PLUS: High-Performance Choice for Engineering Plastics and Modified Products

As extrusoras da série HTS PLUS adotam caixas de engrenagens de alto torque desenvolvidas e fabricadas de forma independente por nós, with a specific torque of 14Nm/cm³, which has stronger torque and load-bearing capacity than the HTS BASIC series. This series of extruders is mainly designed for the processing of high-performance engineering plastics, high-modified engineering plastics and special engineering plastics (como o PPS), which is suitable for medium and large-scale engineering plastics processing enterprises that pursue high performance and high efficiency.

As extrusoras da série HTS PLUS possuem diâmetro de rosca que varia de 65mm a 110mm, uma taxa de compressão de 5~10, and a screw speed range of 200～800 rpm. O parafuso e o cilindro adotam tratamento composto bimetálico, que tem maior resistência ao desgaste e resistência à corrosão (surface hardness ≥65 HRC), and can adapt to the processing of reinforced engineering plastics with high filling amount (such as glass fiber reinforced PA with filling amount 30%-50%, carbon fiber reinforced PPS) and high-hardness modifiers. The extruder is equipped with an advanced intelligent temperature control system and a high-precision pressure sensor, que pode realizar o controle preciso dos parâmetros de extrusão e monitoramento em tempo real dos dados de produção, ensuring the stability of the extrusion process and the quality of the product.

The production capacity of the HTS PLUS series extruders ranges from 500kg/h to 2000kg/h, which is suitable for the large-scale production of general engineering plastics, high-modified engineering plastics and special engineering plastics (como o PPS). This series of extruders has excellent mixing and dispersing effect, short residence time and high production efficiency, which can effectively solve the processing difficulties of high-viscosity and high-modified engineering plastics, and help enterprises improve product quality and production efficiency.

3.2.3 HTS SUPER Series Extruders: Top-End Choice for High-End Engineering Plastics

The HTS SUPER series extruders adopt the latest ultra-high torque transmission device independently developed by us, com torque específico de 14Nm/cm³ e velocidade máxima de até 1000rpm. Aiming at the high torque and high speed characteristics of this series, the structural design of each key component of the extruder has been completely optimized, which is our highest-end extruder series, representing the advanced level of China’s extruder development. This series of extruders is mainly designed for the processing of high-end special engineering plastics (como PEEK, PI, fonte de alimentação, PES) and high-performance modified engineering plastics (such as carbon fiber reinforced PEEK, glass fiber reinforced PI), which is suitable for large-scale high-end engineering plastics processing enterprises that pursue high precision, high performance and intelligence.

The HTS SUPER series extruders have a screw diameter ranging from 80mm to 130mm, a compression ratio of 6～12, and a screw speed range of 250～1000 rpm. The screw and barrel adopt imported wear-resistant alloy steel and laser cladding technology, which has extremely high wear resistance and corrosion resistance (surface hardness ≥70 HRC), and can adapt to the processing of special engineering plastics with high temperature resistance, high viscosity and high-hardness modifiers. The extruder is equipped with an intelligent PLC + cloud touch screen control system, which can realize remote parameter adjustment, production data monitoring, predictive maintenance of equipment and data analysis, realizing intelligent production management.

The production capacity of the HTS SUPER series extruders ranges from 1000kg/h to 3000kg/h, which is suitable for the large-scale production of high-end special engineering plastics and high-performance modified engineering plastics. This series of extruders has the advantages of high precision, personalização forte, multi-function and stable performance, which can meet the most stringent processing requirements of high-end engineering plastics. The short residence time (1-2 minutos) and precise temperature control can effectively avoid the thermal decomposition of special engineering plastics, ensuring the excellent performance of the product. Além disso, the HTS SUPER series extruders can also be customized according to the special processing needs of customers, providing personalized solutions.

3.3 Selection Suggestions for Engineering Plastics Extruders

When selecting twin-screw extruders for engineering plastics processing, as empresas precisam considerar de forma abrangente suas próprias necessidades de produção, tipos de produtos, processing scale, budget and other factors to ensure that the selected equipment can meet the actual processing needs and bring maximum economic benefits. A seguir estão algumas sugestões de seleção específicas:

3.3.1 Determine the Extruder Series According to the Type of Engineering Plastics

Different types of engineering plastics have different processing requirements, which determine the selection of extruder series. For general engineering plastics (PA6, PA66, POM, BICHO DE ESTIMAÇÃO, PBT) with low modification degree (filling amount ≤30%), the HTS BASIC series is sufficient to meet the processing needs. Its medium torque and flexible configuration can balance processing effect and cost, which is very suitable for small and medium-sized enterprises that just start to engage in engineering plastics processing or focus on general-purpose products. For high-modified engineering plastics (quantidade de enchimento 30%-50%, such as glass fiber reinforced PA, carbon fiber reinforced PBT) and special engineering plastics with moderate processing difficulty (como o PPS), the HTS PLUS series is the preferred choice. Its high torque of 14Nm/cm³ and excellent mixing and dispersing capacity can effectively solve the problem of uneven dispersion of high-content modifiers, and its wear-resistant screw and barrel can adapt to the wear of hard modifiers, ensuring stable production. For high-end special engineering plastics (ESPIAR, PI, fonte de alimentação, PES) and high-performance modified engineering plastics (filling amount ≥50%, such as carbon fiber reinforced PEEK), the HTS SUPER series must be selected. Its ultra-high torque, maximum 1000rpm speed and fully optimized key structure can cope with the high viscosity, high temperature resistance and strict processing requirements of high-end materials, avoid thermal decomposition and material degradation, and ensure the high performance of the final product.

3.3.2 Determine the Screw Diameter and Production Capacity According to the Processing Scale

The screw diameter of the twin-screw extruder directly determines the production capacity, and enterprises need to select the appropriate screw diameter according to their own production scale and order demand. For small-scale production (100kg/h – 500kg/h), such as small-batch customization, product research and development or small orders, the HTS BASIC series with screw diameter of 30mm – 65mm is suitable; for medium-scale production (500kg/h – 2000kg/h), such as mass production of general modified engineering plastics, the HTS PLUS series with screw diameter of 65mm – 110mm can meet the demand; for large-scale production (1000kg/h – 3000kg/h), such as large-scale production of high-end special engineering plastics or large orders from downstream enterprises, the HTS SUPER series with screw diameter of 80mm – 130mm is the best choice. It should be noted that when selecting, enterprises should not blindly pursue large production capacity. They should also consider the fluctuation of order quantity. If the order quantity is unstable, they can choose equipment with adjustable speed and flexible production capacity (such as HTS BASIC series with frequency conversion speed regulation function) to avoid waste of equipment resources and energy.

3.3.3 Consider the Modification Demand and Mixing Effect

If the enterprise’s main products are modified engineering plastics, the mixing and dispersing effect of the extruder is the key factor to be considered. For products that need to add a variety of modifiers (como retardadores de chama, compatibilizantes, reinforcing agents) ao mesmo tempo, it is necessary to select extruders with excellent mixing performance, such as HTS PLUS series and HTS SUPER series with modular mixing screw elements. These two series can freely combine conveying elements, mixing elements and shearing elements according to the type of modifier, adjust the mixing intensity and residence time, and ensure that various modifiers are uniformly dispersed in the resin matrix. Por exemplo, when processing flame-retardant modified PBT, more mixing elements can be configured to ensure the uniform dispersion of flame retardants, avoid local flame retardancy insufficiency; when processing glass fiber reinforced PA, more shearing elements can be configured to break the agglomeration of glass fiber and improve the bonding force between glass fiber and resin. Além disso, if the enterprise has the demand of multi-variety and small-batch modification, it is recommended to select the extruder with quick replacement of screw elements (such as the modular screw design of HTS series), which can reduce the time of equipment adjustment and improve production efficiency.

3.3.4 Consider the Cost Budget and Comprehensive Benefits

Cost budget is an important factor for enterprises to select equipment, but it is not advisable to pursue low cost blindly. It is necessary to balance the initial purchase cost, later maintenance cost, energy consumption and production efficiency to maximize the comprehensive benefits. The HTS BASIC series has the lowest initial purchase cost, low energy consumption and simple maintenance, which is suitable for enterprises with limited budget and small production scale; the HTS PLUS series has a moderate initial purchase cost, but its high production efficiency, long service life and stable processing effect can reduce the later maintenance cost and improve product qualification rate, which is suitable for medium and large-sized enterprises with certain budget and pursuit of high performance; the HTS SUPER series has the highest initial purchase cost, but it can process high-end products with high added value, and its intelligent control and long service life can reduce labor cost and maintenance cost in the later period, which is suitable for large-scale enterprises with sufficient budget and focus on high-end market. Além disso, enterprises should also consider the after-sales service of the equipment. Our HTS series extruders provide a complete after-sales service system, incluindo instalação, comissionamento, treinamento técnico, regular maintenance and quick replacement of spare parts, which can reduce the later operation risk of enterprises.

3.3.5 Consider the Compatibility with Auxiliary Equipment

Twin-screw extrusion processing of engineering plastics needs to be matched with a series of auxiliary equipment, such as raw material drying equipment, high-speed mixer, cooler, granulator, screening machine, packaging machine, etc.. When selecting the extruder, enterprises need to consider the compatibility between the extruder and auxiliary equipment to ensure the smooth operation of the entire production line. Our HTS series extruders can be perfectly matched with various standard auxiliary equipment, and can also be customized according to the enterprise’s existing auxiliary equipment to avoid the waste caused by the incompatibility between new equipment and old auxiliary equipment. Por exemplo, if the enterprise already has a high-speed mixer with a mixing capacity of 500kg, it can select the HTS PLUS series extruder with a production capacity of 500kg/h – 800kg/h to match it, ensuring the coordination of raw material premixing and extrusion production.

4. Application Fields of Engineering Plastics and Matching HTS Series Extruder Solutions

Plásticos de engenharia, with their excellent comprehensive performance, have been widely used in automotive, elétrica e eletrônica, médico, aeroespacial, químico, construction and other fields. Different application fields have different requirements on the performance of engineering plastic products, which also puts forward different requirements on extrusion processing equipment. Abaixo, we will elaborate on the application characteristics of engineering plastics in major fields and the matching HTS series extruder solutions, providing targeted reference for enterprises in different fields.

4.1 Automotive Field: Leve, High Temperature Resistance and Wear Resistance

With the development of automotive lightweight and energy-saving and emission-reduction, engineering plastics have become an important material for automotive parts, gradually replacing traditional metal materials. The engineering plastics used in the automotive field mainly include PA, POM, PC, PBT, PPS, etc., which are mainly used in engine parts, interior parts, exterior parts and electrical components. The core requirements for extrusion processing are: leve, high temperature resistance, resistência ao desgaste, dimensional stability and low VOC (compostos orgânicos voláteis), which require the extruder to have precise temperature control, excellent mixing and dispersing effect and stable production capacity.

For automotive interior parts (such as instrument panels, painéis de porta, air ducts) made of general engineering plastics (PA6, POM, PC/ABS alloy), the HTS BASIC series extruders can meet the processing needs. Its flexible configuration can adjust the processing parameters according to the performance requirements of interior parts, ensure the smooth surface and dimensional stability of the product, and its low energy consumption and cost can reduce the production cost of automotive parts. For automotive engine parts (such as intake manifolds, cylinder head covers, oil pans) made of high-temperature resistant and wear-resistant engineering plastics (PA66+GF30, PPS), the HTS PLUS series extruders are more suitable. Its high torque and excellent mixing and dispersing effect can ensure the uniform dispersion of glass fiber, improve the strength and high temperature resistance of the product, and its wear-resistant screw and barrel can adapt to the wear of glass fiber, ensuring long-term stable production. For high-end new energy vehicle parts (such as battery shell, motor insulation parts) made of high-end special engineering plastics (ESPIAR, PI), the HTS SUPER series extruders are required. Its ultra-high torque, precise temperature control and short residence time can avoid thermal decomposition of high-temperature resistant materials, ensure the insulation performance and corrosion resistance of the product, and meet the strict requirements of new energy vehicles on parts performance.

Estudo de caso: A large automotive parts manufacturer specializing in new energy vehicle battery parts selected our HTS SUPER series extruders (screw diameter 100mm) to process carbon fiber reinforced PEEK battery shells. The PEEK material has high viscosity and high temperature resistance, and the carbon fiber filling amount reaches 40%, which has extremely high requirements on extrusion equipment. The HTS SUPER series extruders, with their ultra-high torque of 14Nm/cm³ and maximum speed of 1000rpm, generate strong shear force and mixing force, which makes the carbon fiber uniformly dispersed in the PEEK matrix; the precise temperature control system (precision ±1℃) strictly controls the processing temperature at 380-400℃, avoiding thermal decomposition of PEEK; the short residence time (1.5 minutos) effectively reduces the material degradation, ensuring the strength and insulation performance of the battery shell. After using the HTS SUPER series extruders, the production efficiency of the enterprise is increased by 40%, the product qualification rate is increased from 88% para 99%, and the production cost is reduced by 15%, which has won high recognition from the enterprise.

4.2 Electrical and Electronic Field: Electrical Insulation, Flame Retardancy and Dimensional Stability

The electrical and electronic field is one of the earliest and most widely used fields of engineering plastics. Engineering plastics are mainly used in electrical connectors, wiring boards, relés, motores, abraçadeiras, lamp covers and other components. The core requirements for extrusion processing are: excellent electrical insulation, retardamento de chama, estabilidade dimensional, corrosion resistance and low toxicity, which require the extruder to have precise temperature control, good mixing and dispersing effect and strict quality control capacity.

For general electrical components (such as cable ties, conectores) made of general engineering plastics (PA6, PBT, PC), the HTS BASIC series extruders are suitable. Its flexible configuration can match different die heads to produce components of different shapes and sizes; the precise temperature control ensures the electrical insulation performance of the product, and the low cost can meet the mass production needs of general electrical components. For high-precision electrical components (such as relays, motor windings) made of flame-retardant modified engineering plastics (PBT+GF30+flame retardant, PA66+flame retardant), the HTS PLUS series extruders are preferred. Its high mixing and dispersing effect can ensure the uniform dispersion of flame retardants, avoid local flame retardancy insufficiency, and meet the UL94 V-0 flame retardant standard; the precise dimensional control can ensure the dimensional accuracy of high-precision components, avoiding assembly failure. For high-end electrical components (such as high-temperature resistant connectors, aerospace electrical components) made of special engineering plastics (PPS, fonte de alimentação, PES), the HTS SUPER series extruders are required. Its ultra-high torque and excellent wear resistance can cope with the high viscosity and high hardness of special engineering plastics, and the precise temperature control and short residence time can ensure the electrical insulation performance and high temperature resistance of the product, meeting the strict requirements of high-end electrical and electronic products.

4.3 Medical Field: Biocompatibility, Sterility and Precision

The medical field has extremely strict requirements on materials, and engineering plastics used in the medical field must have good biocompatibility, sterility, corrosion resistance and dimensional stability, and must not produce toxic and harmful substances. The main engineering plastics used in the medical field include PC, PA, ESPIAR, fonte de alimentação, etc., which are mainly used in medical containers, cateteres médicos, implantes médicos, surgical instruments and other products. The core requirements for extrusion processing are: alta precisão, no pollution, desempenho estável, which require the extruder to have high cleanliness, precise temperature control and strict quality control capacity.

For general medical products (such as medical containers, ordinary catheters) made of medical-grade general engineering plastics (medical-grade PC, medical-grade PA), the HTS BASIC series extruders with special cleanliness configuration can meet the requirements. We can customize the screw and barrel with high cleanliness, no dead angle design for the HTS BASIC series, avoid material residue and pollution, and match the sterile feeding and packaging system to ensure the sterility of the product. For high-precision medical products (such as precision catheters, implantes médicos) made of medical-grade special engineering plastics (PEEK de grau médico, medical-grade PSU), the HTS SUPER series extruders with high-precision configuration are required. Its fully optimized screw structure and precise temperature control can ensure the dimensional accuracy of the product (tolerance ≤±0.01mm), and the clean production environment and no pollution design can meet the biocompatibility requirements of medical products; the cloud control function can realize real-time monitoring and recording of the production process, which is convenient for medical product traceability and meets the GMP (Boas Práticas de Fabricação) requirements of the medical field.

4.4 Aerospace Field: High Temperature Resistance, Low Weight and High Strength

The aerospace field has extremely high requirements on the performance of materials, and engineering plastics used in the aerospace field must have excellent high temperature resistance, low weight, high strength, corrosion resistance and radiation resistance. The main engineering plastics used in the aerospace field include PEEK, PI, fonte de alimentação, PES, etc., which are mainly used in aerospace components, aircraft interior parts, satellite components and other products. The core requirements for extrusion processing are: ultra-high precision, ultra-high temperature resistance, desempenho estável, which require the extruder to have the highest level of torque, speed and temperature control capacity.

Due to the extremely strict processing requirements of aerospace-grade engineering plastics, only the HTS SUPER series extruders can meet the demand. Its ultra-high torque transmission device, maximum 1000rpm speed and fully optimized key components can cope with the high viscosity and high temperature resistance of aerospace-grade materials (long-term use temperature up to 300℃); the laser-clad screw and barrel have extremely high wear resistance and corrosion resistance, which can adapt to the processing of high-hardness modifiers (such as carbon fiber, ceramic fiber); the intelligent PLC + cloud touch screen control system can realize precise control of extrusion parameters, and the remote monitoring and predictive maintenance function can ensure the stable operation of equipment in long-term continuous production; the customizable configuration can meet the special processing needs of various aerospace components, ensuring the high performance and high reliability of the product.

4.5 Chemical Field: Corrosion Resistance and Wear Resistance

The chemical field has harsh working environment, and engineering plastics used in the chemical field must have excellent corrosion resistance, resistência ao desgaste, high temperature resistance and pressure resistance. The main engineering plastics used in the chemical field include PPS, ESPIAR, PVDF (polyvinylidene fluoride), etc., which are mainly used in chemical equipment, pipelines, valves, pumps and other products. The core requirements for extrusion processing are: resistência à corrosão, resistência ao desgaste, desempenho estável, which require the extruder to have excellent wear resistance and corrosion resistance, and stable pressure control capacity.

For chemical pipelines and valves made of general corrosion-resistant engineering plastics (PPS, PVDF), the HTS PLUS series extruders are suitable. Its bimetallic composite screw and barrel have excellent corrosion resistance and wear resistance, which can adapt to the corrosion of chemical media and the wear of materials; the stable pressure control capacity can ensure the uniform wall thickness of pipelines and valves, avoiding leakage caused by uneven wall thickness. For high-pressure chemical equipment and corrosion-resistant components made of high-end corrosion-resistant engineering plastics (ESPIAR, PI), the HTS SUPER series extruders are required. Its ultra-high torque and stable conveying capacity can cope with the high viscosity of high-end corrosion-resistant materials, and the laser-clad screw and barrel have extremely high corrosion resistance and wear resistance, which can meet the long-term use requirements in harsh chemical environments; the precise temperature control can avoid thermal decomposition of materials, ensuring the corrosion resistance and pressure resistance of the product.

5. Common Problems and Solutions in Engineering Plastics Twin-Screw Extrusion Processing

In the actual twin-screw extrusion processing of engineering plastics, due to the influence of raw materials, parâmetros de processamento, equipment performance and other factors, various problems often occur, which affect the product quality and production efficiency. Abaixo, we will summarize the common problems in engineering plastics extrusion processing, analyze their causes, and provide corresponding solutions combined with the characteristics of our HTS series extruders, helping enterprises solve practical processing problems and improve production efficiency.

5.1 Problema 1: Thermal Decomposition and Discoloration of Materials

Symptoms: During the extrusion process, the material appears yellowing, blackening, carbonization and other phenomena, and the final product has discoloration, bolhas, cracks and other defects, and the mechanical properties are significantly reduced. This problem is mainly caused by the sensitivity of engineering plastics to overheating and hydrolytic degradation.

Causas: 1. The extrusion temperature is too high or the temperature of a certain section of the barrel is too high, resulting in thermal decomposition of the material; 2. The residence time of the material in the extruder is too long, leading to excessive heating and decomposition; 3. The raw materials are not dried thoroughly, and the moisture in the materials causes hydrolytic degradation during high-temperature processing; 4. The screw speed is too low, resulting in insufficient shear force and prolonged residence time; 5. The flow channel of the die head is blocked, resulting in material accumulation and local overheating.

Soluções: 1. Adjust the extrusion temperature according to the type of engineering plastic, strictly control the temperature of each section of the barrel and die head within the optimal range, and use the precise temperature control function of the HTS series extruders (temperature control precision ±1℃) to avoid local overheating; 2. Increase the screw speed appropriately (within the range suitable for the material) to shorten the residence time of the material. The HTS series extruders can reach a maximum speed of 1000rpm, which can effectively shorten the residence time to 1-3 minutos; 3. Strengthen the drying treatment of raw materials, strictly control the moisture content below 0.1%-0.2%, and use the drying device matched with the HTS series extruders to prevent the raw materials from absorbing moisture again during feeding; 4. Check and clean the die head regularly to ensure the smooth flow channel, avoid material accumulation; 5. If the problem persists, adjust the screw element combination, increase the number of conveying elements, and reduce the number of mixing elements to speed up the material conveying and shorten the residence time.

5.2 Problema 2: Uneven Dispersion of Modifiers

Symptoms: The final product has uneven texture, obvious agglomeration of modifiers (such as glass fiber, fibra de carbono), and the mechanical properties (força, resistência, resistência ao desgaste) are uneven, which cannot meet the use requirements. This problem is common in the processing of modified engineering plastics.

Causas: 1. The premixing effect of raw materials is poor, and the modifiers are not uniformly adhered to the surface of the resin; 2. The screw speed is too low, resulting in insufficient shear force and kneading force, and the modifiers cannot be fully broken and dispersed; 3. The combination of screw elements is unreasonable, and the number of mixing elements and shearing elements is insufficient; 4. The extrusion temperature is too low, the material is not fully melted, and the modifiers cannot be uniformly dispersed in the resin matrix; 5. The particle size of the modifier is too large or uneven.

Soluções: 1. Optimize the premixing process, increase the mixing speed (800-1200rpm) and mixing time (5-10 minutos), add an appropriate amount of compatibilizer to improve the compatibility between the modifier and the resin, and use a high-speed mixer matched with the HTS series extruders to ensure uniform premixing; 2. Increase the screw speed appropriately, use the high-speed performance of the HTS series extruders to generate strong shear force and kneading force, and fully break the agglomerates of modifiers; 3. Adjust the combination of screw elements, increase the number of mixing elements and shearing elements, and use the modular screw design of the HTS series extruders to customize the optimal screw combination according to the type of modifier; 4. Properly increase the extrusion temperature to ensure that the material is fully melted, which is conducive to the uniform dispersion of modifiers; 5. Crush and sieve the modifier to ensure that its particle size is uniform (20-40 malha) and meets the processing requirements.

5.3 Problema 3: Wear of Screw and Barrel

Symptoms: After a period of use, the extrusion capacity of the extruder decreases, the shear force and mixing effect are reduced, the product quality is unstable, and even the screw and barrel are stuck. This problem is mainly caused by the wear of high-hardness modifiers (such as glass fiber, fibra de carbono) on the screw and barrel during the processing of reinforced engineering plastics.

Causas: 1. The screw and barrel are made of materials with poor wear resistance, which cannot resist the wear of high-hardness modifiers; 2. The filling amount of the modifier is too high (≥50%), and the wear is intensified; 3. The particle size of the modifier is too large, which increases the wear on the screw and barrel; 4. The extrusion pressure is too high, which increases the friction between the material and the screw and barrel; 5. The screw and barrel are not maintained regularly, and the material residue accelerates the wear.

Soluções: 1. Select extruders with high wear resistance, such as HTS PLUS series and HTS SUPER series. Their screws and barrels are made of imported wear-resistant alloy steel and undergo bimetallic composite treatment or laser cladding treatment, with surface hardness ≥65 HRC (HTS PLUS) and ≥70 HRC (HTS SUPER), which can effectively resist the wear of high-hardness modifiers; 2. Control the filling amount of the modifier within a reasonable range. If high filling amount is required, select the HTS SUPER series extruders with better wear resistance; 3. Crush and sieve the modifier to reduce its particle size and reduce wear; 4. Adjust the extrusion parameters to control the extrusion pressure within the optimal range (5-15MPa), avoid excessive pressure; 5. Regularly maintain the screw and barrel, clean the material residue in time, and apply lubricating oil appropriately to reduce friction and extend the service life. Além disso, our professional technical team can provide regular wear detection services for the screw and barrel, and put forward targeted replacement and maintenance suggestions.

5.4 Problema 4: Unstable Product Size and Dimensional Deformation

Symptoms: The size of the extruded product (such as granules, tubos, folhas) is uneven, the shrinkage rate exceeds the standard (＞1.5%), and the product has deformation, warpage and other phenomena, which affects the assembly and use of the product.

Causas: 1. The extrusion temperature is unstable, resulting in uneven melting and plasticization of the material, and uneven shrinkage during cooling; 2. The extrusion speed is unstable, leading to uneven extrusion amount and unstable product size; 3. The cooling speed is uneven, resulting in uneven internal and external stress of the product, leading to deformation; 4. The die head structure is unreasonable, the flow channel is not smooth, and the material flow is uneven; 5. The raw materials have high water absorption, and the moisture causes uneven shrinkage during processing.

Soluções: 1. Use the precise temperature control system of the HTS series extruders to ensure the stability of the extrusion temperature, and avoid temperature fluctuation; 2. Adjust the feeding speed and screw speed to ensure the stability of the extrusion speed, and use the frequency conversion speed regulation function of the HTS series extruders to realize the synchronous adjustment of feeding and extrusion; 3. Otimize o processo de resfriamento, ensure uniform cooling speed, adjust the cooling water temperature (20-30℃) and cooling time (2-5 minutos) for strip cooling, and use air cooling or water spray cooling for pipes and sheets to avoid uneven cooling; 4. Check and optimize the die head structure, ensure the smooth flow channel, and adjust the die head temperature to ensure uniform material flow; 5. Strengthen the drying treatment of raw materials, strictly control the moisture content, and reduce the impact of moisture on product shrinkage.

5.5 Problema 5: Low Extrusion Efficiency and High Energy Consumption

Symptoms: The production capacity of the extruder is lower than the design standard, the energy consumption per unit product is high, and the production cost is increased, which affects the economic benefits of the enterprise.

Causas: 1. The screw speed is too low, the conveying capacity is insufficient; 2. The extrusion temperature is too low, the material viscosity is too high, the conveying resistance is increased, and the production capacity is reduced; 3. The combination of screw elements is unreasonable, the conveying efficiency is low; 4. The feeding device is blocked or the feeding speed is insufficient, resulting in insufficient feeding; 5. The screw and barrel are worn, the conveying capacity is reduced, and the energy consumption is increased.

Soluções: 1. Increase the screw speed appropriately (within the range suitable for the material) to improve the conveying capacity and production efficiency. The HTS series extruders can reach a maximum speed of 1000rpm, which can significantly improve production efficiency; 2. Properly increase the extrusion temperature to reduce the material viscosity, reduce the conveying resistance, and improve the conveying efficiency; 3. Adjust the combination of screw elements, increase the number of conveying elements, optimize the screw lead and compression ratio, and improve the conveying efficiency. The modular screw design of the HTS series extruders can realize the quick adjustment of screw elements; 4. Check and clean the feeding device regularly, ensure the smooth feeding, and adjust the feeding speed to match the screw speed, avoid insufficient feeding; 5. Regularly detect the wear degree of the screw and barrel, replace the worn components in time, and maintain the conveying capacity of the extruder, reducing energy consumption. Além disso, the HTS series extruders adopt an optimized structural design and high-efficiency motor, which can reduce energy consumption by 15%-20% compared with ordinary extruders.

6. Conclusion and Future Development Trend

Plásticos de engenharia, como um material chave de alto desempenho, are playing an increasingly important role in global industrial upgrading, and twin-screw extrusion technology is the core support for the high-quality processing of engineering plastics. The performance of extrusion equipment directly determines the quality, eficiência de produção e efeito de aplicação de produtos plásticos de engenharia. Our HTS series twin-screw extruders, including HTS BASIC, HTS PLUS and HTS SUPER, are specially designed for the processing characteristics of engineering plastics (sensibilidade ao superaquecimento e degradação hidrolítica, altos requisitos em efeito de mistura e dispersão, alta viscosidade), with the advantages of high torque, alta velocidade, controle preciso de temperatura, excelente resistência ao desgaste, wide application range and intelligent control. They can provide targeted processing solutions for different types of engineering plastics and different scales of enterprises, helping enterprises solve processing difficulties, improve product quality and production efficiency, and enhance market competitiveness.

Ansioso para o futuro, with the continuous upgrading of downstream industries such as automotive lightweight, inteligência elétrica e eletrônica, new energy and medical high-endization, a demanda por alto desempenho, functional and environmentally friendly engineering plastics will continue to grow, which will also put forward higher requirements on twin-screw extrusion technology and equipment. The future development trend of engineering plastics twin-screw extruders will be mainly reflected in four aspects:

Primeiro, intelligence and digitalization. With the development of Industry 4.0, twin-screw extruders will be more integrated with intelligent technologies such as Internet of Things, big data and artificial intelligence. The HTS series extruders will further optimize the cloud control function, realize real-time monitoring, data analysis, predictive maintenance and intelligent adjustment of the entire production process, reduce labor intervention, and improve production efficiency and product consistency. Ao mesmo tempo, digital simulation technology will be widely used in the design and debugging of extruders, reducing the research and development cycle and debugging time of equipment.

Segundo, high performance and high efficiency. The demand for high-end engineering plastics (como PEEK, PI) will continue to increase, which will promote the continuous upgrading of extruder performance. The future extruders will have higher torque, higher speed and more precise temperature control capacity, and the key components (parafuso, barril, caixa de velocidades) will be further optimized to improve wear resistance, corrosion resistance and service life. Ao mesmo tempo, the energy consumption of the equipment will be further reduced, realizing high-efficiency and energy-saving production.

Terceiro, customization and diversification. Different application fields and different products have increasingly personalized requirements for extrusion processing. The future extruders will adopt a more flexible modular design, which can quickly replace screw elements, die heads and other components according to customer needs, realizing the processing of multiple varieties and small batches. Ao mesmo tempo, we will provide more personalized customized solutions according to the special processing needs of customers, meeting the diverse market demands.

Quarto, environmental protection and greenization. With the strengthening of global environmental protection policies, environmental protection will become an important development direction of extrusion equipment. The future extruders will adopt more environmentally friendly materials and manufacturing processes, reduce energy consumption and pollutant emissions; ao mesmo tempo, they will be more compatible with recyclable engineering plastics and biodegradable engineering plastics, promoting the green development of the engineering plastics industry.

We will always adhere to the concept of technological innovation, focus on the development needs of the engineering plastics industry, continuously invest in research and development, optimize the performance of HTS series extruders, improve after-sales service, and provide more professional, efficient and intelligent twin-screw extrusion solutions for global engineering plastics processing enterprises, helping the high-quality development of the engineering plastics industry.