Tecnologie plastiche Soluzioni avanzate di lavorazione con tecnologia di estrusione bivite e applicazioni industriali

Con il rapido avanzamento dell’industrializzazione globale, la domanda di materiali ad alte prestazioni nel settore automobilistico, elettrici ed elettronici, costruzione, i campi medici e altri aumentano di giorno in giorno. Ingegneria delle materie plastiche, come materiale chiave ad alte prestazioni, hanno gradualmente sostituito i tradizionali materiali metallici e le plastiche generali in molti scenari applicativi fondamentali grazie alle loro eccellenti proprietà meccaniche, resistenza al calore, resistenza alla corrosione, stabilità dimensionale e lavorabilità. La tecnologia di estrusione bivite è la tecnologia di lavorazione principale dei composti plastici tecnici, e le prestazioni delle apparecchiature di estrusione determinano direttamente la qualità, efficienza produttiva ed effetto applicativo dei prodotti in plastica tecnica.

We are committed to providing professional twin-screw extrusion solutions for engineering plastics processing, relying on our independently developed and manufactured HTS series extruders with high-torque gearboxes, which are specially designed for the processing characteristics and application needs of engineering plastics. This article will comprehensively elaborate on the performance characteristics, classificazione, processing difficulties of engineering plastics, the core role of twin-screw extrusion technology in engineering plastics processing, the advantages of our HTS series extruders and their targeted adaptation to engineering plastics, as well as the specific application fields, processing techniques and common problems and solutions. By supplementing detailed technical parameters, processing details and industry application cases, l'articolo verrà arricchito di 3000-4000 parole, fornendo un riferimento completo e professionale per le imprese di lavorazione delle materie plastiche, tecnici e professionisti interessati.

1. Panoramica del settore dei materiali plastici per l'ingegneria e caratteristiche prestazionali principali

1.1 Situazione attuale e trend di sviluppo dell'industria dei materiali plastici

I tecnopolimeri si riferiscono a una classe di materiali plastici che possono essere utilizzati come materiali strutturali e sopportano carichi meccanici in un ampio intervallo di temperature. Rispetto alla plastica generale (come il polietilene PE, polipropilene PP, PVC cloruro di polivinile), i tecnopolimeri hanno prestazioni complete più eccellenti, e può soddisfare i severi requisiti di utilizzo nella produzione industriale e nella produzione di prodotti di fascia alta. Negli ultimi anni, trainato dal potenziamento delle industrie a valle, come quella automobilistica leggera, intelligenza elettrica ed elettronica, e dispositivi medici di fascia alta, il mercato globale dei tecnopolimeri ha mostrato un trend di crescita costante e rapido.

Secondo i dati rilevanti del settore, la dimensione del mercato globale dei tecnopolimeri è stata superata 100 miliardi di dollari americani, e si prevede che manterrà un tasso di crescita annuo composto pari a 7%-10% nei prossimi cinque anni. Tra loro, L’Asia-Pacifico è il più grande mercato mondiale di produzione e consumo di tecnopolimeri, rappresentando più di 55% della quota di mercato globale, principalmente a causa del rapido sviluppo del settore automobilistico, industrie elettriche ed elettroniche in Cina, India e altri paesi, nonché il miglioramento continuo della capacità di supporto industriale e del livello di innovazione tecnologica. Cina, come il più grande consumatore e produttore mondiale di tecnopolimeri, ha un’enorme richiesta di mercato, e la produzione e il consumo annuali crescono a un ritmo a due cifre, soprattutto nel campo dei veicoli a nuova energia, 5Comunicazioni G, e dispositivi medici, la domanda di tecnopolimeri ad alte prestazioni mostra un trend di crescita esplosivo.

Il trend di sviluppo dell’industria dei tecnopolimeri si riflette principalmente in cinque aspetti: Primo, alte prestazioni e funzionalizzazione. Con il continuo miglioramento dei requisiti di utilizzo nei campi a valle, i tecnopolimeri si stanno sviluppando verso una maggiore resistenza al calore, forza più elevata, migliore resistenza all'usura e funzioni speciali (come il ritardante di fiamma, antistatico, antibatterico, resistenza alle radiazioni), per adattarsi al duro ambiente di lavoro ad alta temperatura, alta pressione, corrosione e radiazioni; secondo, leggerezza e integrazione. Nel settore automobilistico, aerospaziale e altri campi, per raggiungere gli obiettivi di risparmio energetico e di riduzione delle emissioni, i tecnopolimeri sono sempre più utilizzati per sostituire i materiali metallici, e l'integrazione della progettazione del prodotto sta diventando sempre più elevata, che può ridurre il numero di parti, semplificare il processo produttivo e ridurre i costi; terzo, tutela dell’ambiente e riciclabilità. Con il rafforzamento delle politiche globali di protezione ambientale e il miglioramento della consapevolezza della protezione ambientale, lo sviluppo e l’applicazione di tecnopolimeri riciclabili, i tecnopolimeri biodegradabili e le tecnologie di lavorazione rispettose dell'ambiente sono diventati il ​​fulcro del settore, ridurre l’inquinamento ambientale causato dai rifiuti di plastica; quarto, intelligenza e precisione delle apparecchiature di lavorazione. I tecnopolimeri presentano elevate difficoltà di lavorazione e severi requisiti di qualità, che impongono requisiti più rigorosi per le apparecchiature di trattamento. Intelligente, estrusori bivite precisi ed efficienti e linee di produzione automatiche sono diventati la corrente principale del settore, realizzare il monitoraggio in tempo reale, regolazione automatica dei parametri e manutenzione predittiva del processo di lavorazione; quinto, diversificazione dei campi di applicazione. I tecnopolimeri si stanno gradualmente espandendo rispetto al settore automobilistico tradizionale, campi elettrici ed elettronici alla nuova energia, medico, aerospaziale, edilizia e altri settori emergenti, aprire nuovi spazi di mercato.

In questo contesto, tecnologia di estrusione bivite, come tecnologia di lavorazione principale dei composti plastici tecnici, è diventata la chiave per migliorare la competitività delle imprese di tecnopolimeri. I tecnopolimeri sono sensibili al surriscaldamento e alla degradazione idrolitica, e hanno requisiti elevati sulla temperatura di lavorazione, forza di taglio, precisione del tempo di permanenza e del controllo della temperatura. I nostri estrusori della serie HTS sono appositamente progettati per le caratteristiche di lavorazione dei tecnopolimeri, con coppia elevata, ad alta velocità, controllo preciso della temperatura ed eccellente disperdibilità, which can effectively solve the processing difficulties of engineering plastics and help enterprises achieve high-quality, efficient and stable production.

1.2 Core Performance Characteristics of Engineering Plastics

Compared with general plastics and metal materials, engineering plastics have unique comprehensive performance, which determines their wide application in various industrial fields. The core performance characteristics of engineering plastics are mainly reflected in the following five aspects, which also put forward special requirements for their processing technology and equipment:

1.2.1 Excellent Heat Resistance and Cold Resistance

Engineering plastics have a wide temperature adaptation range, which can maintain good mechanical properties (forza, tenacità, hardness) in both high and low temperature environments. Rispetto alla plastica generale, che solitamente perdono le loro proprietà meccaniche a 80-120℃, la maggior parte dei tecnopolimeri può funzionare stabilmente a 100-250 ℃, e alcuni tecnopolimeri speciali (come PEEK, PI) può funzionare anche a temperature superiori a 300 ℃. Allo stesso tempo, i tecnopolimeri hanno anche una buona resistenza al freddo, che può mantenere una buona tenacità alle basse temperature (sotto -40℃), e non sono facili da fratturare. Queste prestazioni rendono i tecnopolimeri adatti all'uso in ambienti con temperature rigide, come parti di motori automobilistici (alta temperatura) e apparecchiature elettriche esterne (bassa temperatura).

L'eccellente resistenza al calore dei tecnopolimeri è dovuta principalmente alla loro speciale struttura molecolare (come gli anelli aromatici, anelli eterociclici) e forti forze intermolecolari, il che li rende difficili da sciogliere e decomporsi alle alte temperature. Tuttavia, ciò comporta anche alcune difficoltà di elaborazione: è necessaria una temperatura di lavorazione più elevata per farli sciogliere e plastificare, ed è necessario un controllo preciso della temperatura per evitare la decomposizione termica.

1.2.2 Buona resistenza alla corrosione e durata

I tecnopolimeri hanno un'eccellente stabilità chimica e resistenza alla corrosione, e non sono facili da corrodere dagli acidi, alcali, sali, solventi organici e altri prodotti chimici. Rispetto ai materiali metallici, che sono facili da arrugginire e corrodere, i tecnopolimeri hanno una durata di servizio più lunga in ambienti chimici difficili. Per esempio, poliammide (PA) i tecnopolimeri sono resistenti alla maggior parte dei solventi organici, agli acidi e agli alcali deboli; policarbonato (computer) i tecnopolimeri sono resistenti alla corrosione da parte di acidi e sali non ossidanti; polifenilene solfuro (PPS) engineering plastics are resistant to corrosion by almost all chemicals except strong oxidizing acids.

Inoltre, engineering plastics have good weather resistance and aging resistance, and are not easy to degrade and age under the action of sunlight, rain, oxygen and other environmental factors, which ensures their long-term stable use in outdoor and harsh environments. This performance makes engineering plastics widely used in chemical equipment, outdoor electrical equipment, automotive exterior parts and other fields.

1.2.3 Easy Processing and High Production Efficiency

Rispetto ai materiali metallici, engineering plastics have the advantages of easy processing, simple production process and high production efficiency. Metal materials usually need complex processing procedures such as forging, casting, lavorazione, which have high energy consumption, low efficiency and high cost; mentre i tecnopolimeri possono essere lavorati mediante estrusione, stampaggio ad iniezione, soffiaggio e altri metodi, che può realizzare la produzione di massa, semplificare il processo produttivo, ridurre il consumo energetico e i costi di produzione. Per esempio, il ciclo di lavorazione di un componente automobilistico in tecnopolimero mediante stampaggio a iniezione dura solo da pochi secondi a decine di secondi, mentre il ciclo di lavorazione della stessa parte metallica può durare da diverse ore a diversi giorni.

Tuttavia, anche i tecnopolimeri presentano alcune difficoltà di lavorazione: sono sensibili al surriscaldamento e alla degradazione idrolitica, e sono facili da decomporre se la temperatura di lavorazione è troppo elevata o il tempo di permanenza è troppo lungo; allo stesso tempo, alcuni tecnopolimeri (come PA) hanno un elevato assorbimento d'acqua, che influisce sull'effetto della lavorazione e sulla qualità del prodotto. Perciò, è necessario utilizzare apparecchiature di elaborazione professionali e tecniche di elaborazione scientifiche per garantire la qualità dell'elaborazione.

1.2.4 Eccellente stabilità dimensionale e isolamento elettrico

I tecnopolimeri hanno una buona stabilità dimensionale, e il tasso di restringimento è piccolo (Generalmente 0.3%-1.5%) durante la lavorazione e l'utilizzo, che può garantire l'accuratezza dimensionale dei prodotti ed evitare deformazioni. Questa prestazione è particolarmente importante per le parti di alta precisione, come i connettori elettrici, componentistica automobilistica di precisione, dispositivi medici, ecc. La buona stabilità dimensionale dei tecnopolimeri è dovuta principalmente alla loro elevata cristallinità, basso assorbimento d'acqua (ad eccezione di alcune varietà come PA) e forti forze intermolecolari.

Inoltre, la maggior parte dei tecnopolimeri hanno eccellenti prestazioni di isolamento elettrico, che può mantenere buone prestazioni di isolamento in un ampio intervallo di temperature e frequenze, e non sono facili da condurre elettricità e arco. Ciò rende i tecnopolimeri ampiamente utilizzati nei campi elettrici ed elettronici, come le schede di cablaggio, fascette per cavi, connettori, relè, motori e altri componenti elettrici.

1.2.5 Leggero ed elevata resistenza specifica, Eccezionale resistenza all'usura

I tecnopolimeri hanno le caratteristiche di leggerezza (la densità è 1/3-1/5 di materiali metallici) ed elevata forza specifica (la resistenza per unità di peso è equivalente o addirittura superiore a quella dei materiali metallici). Per esempio, la resistenza specifica della poliammide rinforzata con fibra di vetro (PA66+GF30) è superiore a quello del normale acciaio al carbonio, che può ridurre efficacemente il peso dei prodotti garantendo al tempo stesso le prestazioni meccaniche. Questa prestazione è particolarmente importante nel settore automobilistico, aerospaziale e altri campi che perseguono la leggerezza e il risparmio energetico, che può ridurre il consumo di carburante e le emissioni di carbonio.

Allo stesso tempo, i tecnopolimeri hanno anche un'eccezionale resistenza all'usura e all'attrito, e il coefficiente di attrito è piccolo, che può essere utilizzato nella produzione di parti resistenti all'usura (come gli ingranaggi, cuscinetti, blocchi scorrevoli) senza lubrificazione aggiuntiva o con minore lubrificazione, riducendo i costi di manutenzione dei prodotti. Per esempio, poliossimetilene (POM) i tecnopolimeri hanno un'eccellente resistenza all'usura e sono noti come “acciaio plastico”, che è ampiamente utilizzato nella produzione di ingranaggi automobilistici, componenti elettrici e altre parti resistenti all'usura.

1.3 Classificazione comune dei tecnopolimeri

I tecnopolimeri possono essere suddivisi in diversi tipi in base alla loro struttura chimica, livello di prestazione e campo di applicazione. I metodi di classificazione comuni sono i seguenti, 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 (computer), poliossimetilene (POM), polietilene tereftalato (ANIMALE DOMESTICO), polybutylene terephthalate (PBT), ecc. General engineering plastics are mainly used in automotive, elettrici ed elettronici, home appliances and other fields, such as automotive parts, electrical connectors, home appliance shells, ecc.
• Special Engineering Plastics: They have more excellent performance (such as higher heat resistance, resistenza alla corrosione, proprietà meccaniche) than general engineering plastics, but the production technology is complex and the price is high. The main varieties include polyphenylene sulfide (PPS), polyether ether ketone (SBIRCIARE), polyimide (PI), polysulfone (PSU), polyethersulfone (PES), ecc. Special engineering plastics are mainly used in high-end fields such as aerospace, dispositivi medici, new energy, and chemical equipment, such as aerospace components, medical implants, high-temperature resistant electrical components, ecc.

1.3.2 Classification by Chemical Structure

According to the chemical structure of the molecular chain, engineering plastics can be divided into polyamide (PA), policarbonato (computer), poliossimetilene (POM), polyester (ANIMALE DOMESTICO, PBT), polifenilene solfuro (PPS), polyether ether ketone (SBIRCIARE), ecc. Each type of engineering plastic has its own unique performance characteristics and processing requirements:

• Poliammide (PA): Also known as nylon, it has excellent mechanical strength, wear resistance, toughness and chemical resistance, but has high water absorption, which affects the dimensional stability. Common varieties include PA6, PA66, PA11, PA12, ecc. It is widely used in automotive parts (ingranaggi, cuscinetti, intake manifolds), electrical connectors, textile fibers, ecc.
• Policarbonato (computer): It has excellent transparency, forza d'impatto, 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), ecc.
• Polyoxymethylene (POM): It has excellent wear resistance, friction resistance, dimensional stability and mechanical strength, and is not easy to absorb water. It is known as “acciaio plastico” and is widely used in automotive parts (ingranaggi, blocchi scorrevoli), electrical components (switches, cuscinetti), mechanical parts, ecc.
• Polyester (ANIMALE DOMESTICO, PBT): PET has excellent transparency, heat resistance and mechanical strength, and is mainly used in fibers, film, bottles and other fields; PBT has excellent chemical resistance, electrical insulation and processing fluidity, and is widely used in electrical and electronic fields (connettori, relè), parti automobilistiche, ecc.
• Polyphenylene Sulfide (PPS): It has excellent heat resistance (long-term use temperature up to 200-220℃), resistenza alla corrosione, flame retardancy and electrical insulation, but has poor toughness. It is widely used in high-temperature resistant electrical components, automotive engine parts, chemical equipment, ecc.
• Polyether Ether Ketone (SBIRCIARE): It has excellent comprehensive performance, long-term use temperature up to 250-300℃, good corrosion resistance, mechanical strength and biocompatibility. It is mainly used in high-end fields such as aerospace, medical implants, and high-temperature resistant electrical components.

1.3.3 Classificazione per campo di applicazione

According to the application field, engineering plastics can be divided into automotive-grade engineering plastics, electrical-grade engineering plastics, medical-grade engineering plastics, tecnopolimeri di grado aerospaziale, ecc. Diversi campi di applicazione hanno requisiti diversi in termini di prestazioni dei tecnopolimeri. Per esempio, i tecnopolimeri di tipo automobilistico richiedono una buona resistenza al calore, resistenza agli urti e resistenza agli agenti atmosferici; i tecnopolimeri di grado elettrico richiedono un buon isolamento elettrico e proprietà ignifughe; le plastiche tecniche per uso medico richiedono una buona biocompatibilità e sterilità; i tecnopolimeri di grado aerospaziale richiedono una buona resistenza alle alte temperature, peso ridotto e alta resistenza.

2. Tecnologia di lavorazione principale dei materiali plastici tecnici: Tecnologia di estrusione a doppia vite

La lavorazione dei tecnopolimeri comprende principalmente l'estrusione, stampaggio ad iniezione, soffiaggio, stampaggio e altri metodi, tra cui la tecnologia di estrusione bivite è la tecnologia di base per la produzione di compound di tecnopolimeri (come i tecnopolimeri modificati, tecnopolimeri rinforzati) and semi-finished products (such as pipes, fogli, fibre). Rispetto alla tecnologia di estrusione a vite singola, twin-screw extrusion technology has the advantages of strong shearing force, good mixing effect, controllo preciso della 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

As mentioned earlier, engineering plastics have excellent comprehensive performance, but their processing difficulty is also higher than that of general plastics, mainly due to their special molecular structure and performance characteristics. The main processing difficulties of engineering plastics and the corresponding requirements for extrusion equipment are as follows:

2.1.1 Sensitivity to Overheating and Hydrolytic Degradation

Most engineering plastics (come PA, PBT, PPS) are sensitive to overheating and hydrolytic degradation. If the processing temperature is too high or the residence time in the extruder is too long, the molecular chain of the engineering plastic will break, resulting in thermal decomposition, which will reduce the mechanical properties, heat resistance and other performance of the product, and even cause discoloration, carbonization and other defects. Inoltre, alcuni tecnopolimeri (come PA) hanno un elevato assorbimento d'acqua, 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: Primo, precisa capacità di controllo della temperatura, che può controllare rigorosamente la temperatura di lavorazione entro l'intervallo ottimale dei tecnopolimeri, evitare il surriscaldamento locale, e la precisione del controllo della temperatura dovrebbe raggiungere ±1℃; secondo, breve tempo di permanenza, che può ridurre il tempo di permanenza del materiale nel cilindro dell'estrusore, evitare la decomposizione termica e la degradazione idrolitica. Gli estrusori bivite presentano il vantaggio di un breve tempo di permanenza (Generalmente 1-5 minuti) e controllo preciso della temperatura, che sono più adatti alla lavorazione dei tecnopolimeri rispetto agli estrusori monovite (tempo di residenza 5-10 minuti).

2.1.2 Requisiti elevati sull'effetto di miscelazione e dispersione

Nella lavorazione delle materie plastiche, spesso è necessario aggiungere modificatori (come la fibra di vetro, fibra di carbonio, talco, ritardanti di fiamma, compatibilizzanti) per migliorare le prestazioni del prodotto (come quello di rinforzo, indurimento, ritardante di fiamma). Per esempio, l'aggiunta di fibra di vetro al PA può migliorarne la resistenza e la stabilità dimensionale; l'aggiunta di ritardanti di fiamma al PBT può migliorarne il ritardo di fiamma. La miscelazione e la dispersione uniformi dei modificatori nella matrice della plastica tecnica sono cruciali per le prestazioni del prodotto finale. Se l'effetto di miscelazione e dispersione è scarso, i modificatori si agglomeranno, con conseguente prestazione irregolare del prodotto, e persino ridurre le proprietà meccaniche del prodotto.

Ciò richiede che l'attrezzatura di estrusione abbia una forte forza di taglio e capacità di miscelazione. Gli estrusori bivite adottano una struttura bivite corotante o controrotante che si intreccia, e il movimento relativo tra le viti può generare una forte forza di taglio e forza di impasto, che può rompere completamente gli agglomerati di modificanti, rendere i modificatori uniformemente dispersi nella matrice del tecnopolimero, and ensure the mixing and dispersing effect. Inoltre, the modular design of the twin-screw can freely combine different screw elements (such as conveying elements, elementi di miscelazione, shearing elements) 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 la vite e il cilindro hanno scarsa resistenza all'usura, saranno indossati rapidamente, resulting in reduced shearing force and mixing capacity of the extruder, affecting the product quality and reducing the service life of the equipment.

Ciò richiede che la vite e il cilindro dell'estrusore siano realizzati con materiali resistenti all'usura di alta qualità e lavorati con tecnologia di produzione avanzata. Our HTS series extruders adopt imported wear-resistant alloy steel for the screw and barrel, e sottoposti a trattamento composito bimetallico o trattamento di rivestimento laser, which greatly improves the wear resistance and corrosion resistance of the screw and barrel, and can adapt to the processing of reinforced engineering plastics with high hardness modifiers.

2.1.4 High Requirements on Processing Fluidity and Pressure Control

Some engineering plastics (such as PPS, SBIRCIARE) have high viscosity and poor processing fluidity, which require the extruder to have strong conveying capacity and pressure control capacity to ensure the smooth progress of extrusion. If the conveying capacity is insufficient or the pressure control is unstable, 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. L'intreccio delle viti gemelle può generare una forte forza di pompaggio, che può trasportare efficacemente materiali plastici tecnici ad alta viscosità; allo stesso tempo, l'estrusore è dotato di un sensore di pressione ad alta precisione, che può monitorare la pressione di estrusione in tempo reale e regolare automaticamente la velocità della vite e la velocità di alimentazione per garantire la stabilità della pressione di estrusione e il regolare avanzamento della lavorazione.

2.2 Principio di funzionamento e flusso del processo di estrusione bivite di tecnopolimeri

Il processo di estrusione bivite dei tecnopolimeri è un processo fisico e chimico complesso, che comporta l’interazione di molteplici fattori come la temperatura, pressione, forza di taglio e tempo. Lo scopo principale è quello di fondere e plastificare le materie prime e i modificatori della plastica tecnica, mescolarli uniformemente, e poi estruderli nella forma richiesta (come le particelle, tubi, fogli, fibre) attraverso la testa della filiera. Il principio di funzionamento specifico e il flusso del processo sono i seguenti:

2.2.1 Pretrattamento delle materie prime

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 (come PA, computer, POM), modifiers (come la fibra di vetro, fibra di carbonio, talco, ritardanti di fiamma), compatibilizzanti, lubricants and other additives. The pretreatment steps are as follows:

• Drying Treatment: Most engineering plastics (come PA, PBT, PPS) hanno un elevato assorbimento d'acqua, and the moisture in the raw materials will cause hydrolytic degradation during high-temperature processing, resulting in product defects (such as bubbles, cracks, reduced mechanical properties). Perciò, the raw materials must be dried before processing. The drying temperature and time are determined according to the type of engineering plastic: Per esempio, PA6 is dried at 80-100℃ for 4-6 ore, PA66 is dried at 100-120℃ for 6-8 ore, PBT is dried at 120-140℃ for 2-4 ore, PPS is dried at 150-160℃ for 3-5 ore. 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 giri/min, and the mixing time is 5-10 minuti. 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 (come la fibra di vetro), 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 maglia.

2.2.2 Alimentazione e trasporto

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. La tramoggia di alimentazione è inoltre dotata di un dispositivo di asciugatura per evitare che le materie prime assorbano nuovamente umidità durante l'alimentazione.

2.2.3 Fusione, Miscelazione e taglio

I materiali che entrano nella cavità di estrusione dell'estrusore bivite vengono spinti in avanti continuamente dalle viti rotanti. La cavità di estrusione è composta da una vite e un cilindro, e il volume della cavità di estrusione diminuisce gradualmente lungo la direzione dell'asse. Quando le viti ruotano, i materiali vengono gradualmente compressi sotto l'azione delle viti e della canna, e la pressione nella cavità di estrusione aumenta gradualmente (generalmente 5-15 MPa).

Allo stesso tempo, i materiali sono sottoposti a forti forze di taglio e di attrito generate dal movimento relativo tra le viti e la canna, così come tra le eliche. La forza di taglio e la forza di attrito possono rompere completamente gli agglomerati di modificanti, rendere i modificatori uniformemente dispersi nella resina tecnoplastica fusa, e promuovere la fusione e la compatibilità tra il modificatore e la resina. La forza di attrito può anche generare una certa quantità di calore, che è combinato con il riscaldamento esterno della botte (riscaldamento elettrico o riscaldamento a vapore) per far sì che la resina plastica tecnica si sciolga e plastifichi gradualmente.

La canna dell'estrusore è solitamente divisa in 4-6 temperature control sections (feeding section, melting section, mixing section, homogenizing section, die head section), and the temperature of each section is precisely controlled according to the type of engineering plastic. Per esempio, 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 (granuli), 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, fogli, fibre, 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, tubi, fogli). 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 minuti; 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 (granuli), 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.

Inoltre, il prodotto finale deve inoltre essere sottoposto a fasi di post-elaborazione come lo screening, ispezione e imballaggio. La fase di screening consiste nel rimuovere i prodotti non qualificati (come troppo grande, particelle troppo piccole o agglomerate); la fase di ispezione consiste nel rilevare le prestazioni (come la resistenza meccanica, resistenza al calore, precisione dimensionale) del prodotto per garantire che soddisfi le esigenze del cliente; la fase di confezionamento consiste nell'imballare il prodotto qualificato in modo sigillato e a prova di umidità per evitare che il prodotto assorba umidità e comprometta la qualità.

2.3 Fattori chiave che influenzano l’effetto dell’estrusione bivite dei tecnopolimeri

L'effetto dell'estrusione bivite influisce direttamente sulla qualità e sulle prestazioni dei prodotti in plastica tecnica. Ci sono molti fattori che influenzano l'effetto dell'estrusione, comprendendo principalmente le caratteristiche della materia prima, rapporto della formula, premixing effect, extrusion parameters and die head structure. 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. Per esempio, 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. The purity of raw materials is also very important; impurities in raw materials (such as metals, stones, dust) will not only affect the product quality, but also wear the screw and barrel of the extruder, and even cause equipment blockage.

2.3.2 Formula Ratio

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. Per esempio, adding 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. Anche il tipo e il dosaggio degli additivi devono essere ragionevolmente abbinati: 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, migliorare la fluidità della lavorazione, 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 Effetto di premiscelazione

Premixing is the foundation of extrusion processing. The uniformity of premixing directly affects the mixing and dispersing effect of modifiers during extrusion. Se la premiscelazione non è uniforme, 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. Per garantire l'effetto di premiscelazione, è necessario controllare la velocità di miscelazione, tempo di miscelazione e temperatura di miscelazione: the mixing speed is 800-1200 giri/min, il tempo di miscelazione è 5-10 minuti, e la temperatura di miscelazione è controllata a 40-60 ℃ (una temperatura adeguata può migliorare l'adesione degli additivi e favorire una miscelazione uniforme).

2.3.4 Parametri di estrusione

Extrusion parameters are the most important factors affecting the extrusion effect, includendo principalmente la velocità della vite, temperatura di estrusione e pressione di estrusione.

• Velocità della vite: The screw speed of twin-screw extruders for engineering plastics generally ranges from 100 A 1000 giri/min. Our HTS series extruders can reach a maximum speed of 1000 giri/min. Maggiore è la velocità della vite, maggiore è la forza di taglio e la forza di attrito ricevuta dai materiali, the better the mixing and dispersing effect of modifiers, e maggiore è l'efficienza produttiva. Tuttavia, se la velocità della vite è troppo alta, il tempo di permanenza dei materiali nella cavità di estrusione è troppo breve, resulting in incomplete melting of the resin, insufficient mixing of materials, and uneven product quality; se la velocità della vite è troppo bassa, la forza di taglio e la forza di attrito sono insufficienti, the modifiers cannot be fully dispersed, e l'efficienza produttiva è bassa. The screw speed should be adjusted according to the type of engineering plastic and the type of modifier: for high-viscosity engineering plastics (such as PPS, SBIRCIARE), 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.
• Extrusion Temperature: 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. The temperature of the feeding section is lower (slightly higher than the drying temperature of the raw materials), which is mainly to prevent the materials from caking and ensure smooth feeding; the temperature of the melting section is medium, which is mainly to promote the melting and plasticization of the resin; the temperature of the mixing section is higher, 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.
• Extrusion Pressure: 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. Tuttavia, 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 (granuli), 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

We have long been engaged in the research, development and production of high-performance twin-screw extruders, and have accumulated rich experience in the field of engineering plastics processing. According to the processing characteristics of engineering plastics (sensitivity to overheating and hydrolytic degradation, high requirements on mixing and dispersing effect, high viscosity) and application needs, we have developed the HTS series twin-screw extruders specially for engineering plastics processing. Our HTS series extruders adopt high-torque gearboxes, with a specific torque of 14Nm/cm³ and a maximum speed of up to 1000rpm, which can obtain higher output, shorter residence time, better dispersibility and more precise temperature control, perfectly adapting to the processing needs of various engineering plastics.

3.1 Core Advantages of HTS Series Extruders for Engineering Plastics Processing

3.1.1 High Torque and High Speed, High Production Efficiency

Engineering plastics have high viscosity and poor processing fluidity, 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.

Allo stesso 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, che può rompere completamente gli agglomerati di modificanti, make the modifiers uniformly dispersed in the resin matrix, and improve the mixing and dispersing effect. Inoltre, 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 minuti, which is much shorter than that of ordinary twin-screw extruders (5-10 minuti) and single-screw extruders (10-15 minuti). 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.

Inoltre, 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 Controllo preciso della temperatura, Prestazioni stabili

The HTS series extruders adopt an advanced intelligent temperature control system, che può realizzare un controllo preciso della temperatura di ciascuna sezione del barilotto e della testa dello stampo. The temperature control precision can reach ±1℃, che può controllare rigorosamente la temperatura di lavorazione entro l'intervallo ottimale dei tecnopolimeri, avoid local overheating and thermal decomposition of the material. Il sistema di controllo della temperatura è dotato di una funzione di monitoraggio e allarme in tempo reale: if the temperature of any section exceeds the set range, the system will issue an alarm prompt in time, and even automatically adjust the heating power or shut down the equipment if necessary, to avoid equipment failure and product quality problems.

Inoltre, the barrel of the HTS series extruders adopts a double-layer jacket design, which can realize rapid heating and cooling, and improve the response speed of temperature control. The die head is also equipped with an independent temperature control device, which ensures the uniform temperature of the die head and the stable shaping of the product.

3.1.4 Excellent Mixing and Dispersing Effect

The HTS series extruders adopt an intermeshing co-rotating twin-screw structure, with a reasonable screw pitch, progettazione del rapporto di compressione e piombo. L'intreccio e la rotazione delle viti gemelle possono generare una forte forza di taglio e di impasto, che può rompere completamente gli agglomerati di modificanti (come la fibra di vetro, fibra di carbonio, 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 (such as conveying elements, elementi di miscelazione, shearing elements) can be freely combined according to the type of engineering plastic and modifier. Per esempio, 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 (such as PPS), more mixing elements can be configured to improve the mixing effect and ensure the uniform viscosity of the material.

3.1.5 High Wear Resistance, Lunga durata

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 (come 38CrMoAlA), e sottoposti a trattamento composito bimetallico o trattamento di rivestimento 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), che ha una resistenza all'usura e alla corrosione estremamente forte, and can effectively resist the wear caused by high-hardness modifiers. Ciò prolunga notevolmente la durata della vite e del cilindro: 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.

Inoltre, forniamo anche servizi professionali di rilevamento dell'usura per la vite e il cilindro. Il nostro team tecnico rileverà regolarmente per i clienti il ​​grado di usura della vite e del cilindro, emettere un rapporto di usura dettagliato, e avanzare suggerimenti mirati per la sostituzione e la manutenzione, ensuring that customers only replace components when necessary, avoiding unnecessary waste.

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, computer, POM, ANIMALE DOMESTICO, PBT) and special engineering plastics (PPS, SBIRCIARE, PSU, 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, ecc.

The modular design of the HTS series extruders (vite, botte, morire testa, ecc.) 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, without replacing the entire equipment, which reduces the cost of equipment transformation and improves the flexibility and adaptability of the equipment. Inoltre, the HTS series extruders can also be matched with different auxiliary equipment (such as high-speed mixers, 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, che è semplice ed intuitivo, facile da usare. Il sistema può memorizzare più set di formule di prodotto e parametri di lavorazione. When customers produce different types of engineering plastics, devono solo chiamare la formula e i parametri corrispondenti, senza ripetuti debugging, che consente di risparmiare tempo e migliorare l'efficienza produttiva.

The system is also equipped with a real-time monitoring function, which can monitor the key parameters of the extrusion process (such as temperature, pressione, velocità della vite, feeding speed) 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.

Inoltre, the HTS series extruders adopt a reasonable structural design, which makes the maintenance more convenient. La vite, botte, la testa e gli altri componenti possono essere smontati e assemblati rapidamente, che riduce il tempo di manutenzione e l'intensità del lavoro. Il nostro team di assistenza post-vendita fornirà un'installazione professionale, servizi di commissioning e formazione per i clienti, garantire che i clienti possano utilizzare l'attrezzatura senza problemi.

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, low noise, 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, ANIMALE DOMESTICO, PBT) and low-to-medium modified engineering plastics (such as glass fiber reinforced PA with filling amount ≤30%).

In terms of structural design, 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. One of the biggest advantages of this series is that it can provide flexible options through different configuration combinations. Customers can choose different screw elements, teste di morire, feeding devices, drying devices and post-processing equipment according to their own product types, production capacity and budget, so as to form a production line suitable for their own needs. The HTS BASIC series extruders have a reasonable price, which can help enterprises reduce the initial investment cost.

3.2.2 HTS PLUS Series Extruders: High-Performance Choice for Engineering Plastics and Modified Products

The HTS PLUS series extruders adopt high-torque gearboxes independently developed and manufactured by us, 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 (such as PPS), which is suitable for medium and large-scale engineering plastics processing enterprises that pursue high performance and high efficiency.

Gli estrusori della serie HTS PLUS hanno un diametro della vite che varia da 65 mm a 110 mm, un rapporto di compressione di 5～10, and a screw speed range of 200～800 rpm. La vite e la canna adottano un trattamento composito bimetallico, che ha una maggiore resistenza all'usura e alla corrosione (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, che può realizzare un controllo preciso dei parametri di estrusione e un monitoraggio in tempo reale dei dati di produzione, 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 (such as 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 Estrusori serie HTS SUPER: Top-End Choice for High-End Engineering Plastics

Gli estrusori della serie HTS SUPER adottano l'ultimo dispositivo di trasmissione della coppia ultraelevata sviluppato indipendentemente da noi, with a specific torque of 14Nm/cm³ and a maximum speed of up to 1000rpm. Puntando alle caratteristiche di coppia elevata e alta velocità di questa serie, il design strutturale di ciascun componente chiave dell'estrusore è stato completamente ottimizzato, che è la nostra serie di estrusori di fascia alta, che rappresenta il livello avanzato dello sviluppo degli estrusori in Cina. This series of extruders is mainly designed for the processing of high-end special engineering plastics (come PEEK, PI, PSU, 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.

Gli estrusori della serie HTS SUPER hanno un diametro della vite che varia da 80 mm a 130 mm, un rapporto di compressione di 6～12, and a screw speed range of 250～1000 rpm. La vite e il cilindro adottano acciaio legato resistente all'usura importato e tecnologia di rivestimento laser, 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, strong customization, multi-function and stable performance, which can meet the most stringent processing requirements of high-end engineering plastics. The short residence time (1-2 minuti) and precise temperature control can effectively avoid the thermal decomposition of special engineering plastics, ensuring the excellent performance of the product. Inoltre, 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, le imprese devono considerare in modo globale le proprie esigenze produttive, tipi di prodotto, processing scale, budget and other factors to ensure that the selected equipment can meet the actual processing needs and bring maximum economic benefits. The following are some specific selection suggestions:

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, ANIMALE DOMESTICO, 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 (quantità di riempimento 30%-50%, such as glass fiber reinforced PA, carbon fiber reinforced PBT) and special engineering plastics with moderate processing difficulty (such as 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 (SBIRCIARE, PI, PSU, 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 (such as flame retardants, compatibilizzanti, reinforcing agents) allo stesso 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. Per esempio, 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. Inoltre, 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. Inoltre, enterprises should also consider the after-sales service of the equipment. Our HTS series extruders provide a complete after-sales service system, compresa l'installazione, messa in servizio, technical training, 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, granulatore, screening machine, packaging machine, ecc. 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. Per esempio, 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

Ingegneria delle materie plastiche, with their excellent comprehensive performance, have been widely used in automotive, elettrici ed elettronici, medico, aerospaziale, chimico, 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. Sotto, 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: Leggero, 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, computer, PBT, PPS, ecc., which are mainly used in engine parts, interior parts, exterior parts and electrical components. The core requirements for extrusion processing are: leggero, high temperature resistance, wear resistance, dimensional stability and low VOC (composti organici volatili), 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, door panels, 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 (SBIRCIARE, 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.

Caso di studio: 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 minuti) 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% A 99%, and the production cost is reduced by 15%, which has won high recognition from the enterprise.

4.2 Electrical and Electronic Field: Isolamento elettrico, 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, relè, motori, fascette per cavi, lamp covers and other components. The core requirements for extrusion processing are: excellent electrical insulation, ritardante di fiamma, stabilità dimensionale, 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, connettori) made of general engineering plastics (PA6, PBT, computer), 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, PSU, 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, SBIRCIARE, PSU, ecc., which are mainly used in medical containers, cateteri medici, medical implants, surgical instruments and other products. The core requirements for extrusion processing are: high precision, no pollution, prestazione stabile, 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, medical implants) made of medical-grade special engineering plastics (medical-grade PEEK, 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 (Good Manufacturing Practice) 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, PSU, PES, ecc., 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, prestazione stabile, 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, wear resistance, high temperature resistance and pressure resistance. The main engineering plastics used in the chemical field include PPS, SBIRCIARE, PVDF (polyvinylidene fluoride), ecc., which are mainly used in chemical equipment, pipelines, valves, pumps and other products. The core requirements for extrusion processing are: resistenza alla corrosione, wear resistance, prestazione stabile, 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 (SBIRCIARE, 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, parametri di elaborazione, equipment performance and other factors, various problems often occur, which affect the product quality and production efficiency. Sotto, 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 Problem 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, bolle, 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.

Causes: 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.

Solutions: 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 minuti; 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 Problem 2: Uneven Dispersion of Modifiers

Symptoms: The final product has uneven texture, obvious agglomeration of modifiers (come la fibra di vetro, fibra di carbonio), and the mechanical properties (forza, tenacità, wear resistance) are uneven, which cannot meet the use requirements. This problem is common in the processing of modified engineering plastics.

Causes: 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.

Solutions: 1. Optimize the premixing process, increase the mixing speed (800-1200giri/min) and mixing time (5-10 minuti), 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 maglia) and meets the processing requirements.

5.3 Problem 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 (come la fibra di vetro, fibra di carbonio) on the screw and barrel during the processing of reinforced engineering plastics.

Causes: 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.

Solutions: 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. Inoltre, our professional technical team can provide regular wear detection services for the screw and barrel, e avanzare suggerimenti mirati per la sostituzione e la manutenzione.

5.4 Problem 4: Unstable Product Size and Dimensional Deformation

Symptoms: The size of the extruded product (such as granules, tubi, fogli) 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.

Causes: 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.

Solutions: 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. Optimize the cooling process, ensure uniform cooling speed, adjust the cooling water temperature (20-30℃) and cooling time (2-5 minuti) 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 Problem 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.

Causes: 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.

Solutions: 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. Inoltre, 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

Ingegneria delle materie plastiche, come materiale chiave ad alte prestazioni, 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, efficienza produttiva ed effetto applicativo dei prodotti in plastica tecnica. Our HTS series twin-screw extruders, including HTS BASIC, HTS PLUS and HTS SUPER, are specially designed for the processing characteristics of engineering plastics (sensitivity to overheating and hydrolytic degradation, high requirements on mixing and dispersing effect, high viscosity), with the advantages of high torque, ad alta velocità, controllo preciso della temperatura, excellent wear resistance, 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.

Looking forward to the future, with the continuous upgrading of downstream industries such as automotive lightweight, intelligenza elettrica ed elettronica, new energy and medical high-endization, the demand for high-performance, 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:

Primo, 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. Allo stesso 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.

Secondo, high performance and high efficiency. The demand for high-end engineering plastics (come 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 (vite, botte, cambio) will be further optimized to improve wear resistance, corrosion resistance and service life. Allo stesso tempo, the energy consumption of the equipment will be further reduced, realizing high-efficiency and energy-saving production.

Terzo, 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. Allo stesso 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; allo stesso 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.