Polasetiki e tsoetseng pele Granulation: Thekenoloji, Thepa le Litharollo tsa Zhuoyue Extruder

Mehleng ea ho eketseha ha tlhokomeliso ea tikoloho le maano a thata a paballo ea lisebelisoa, ho sebelisoa hape ka polasetiki e se e le taba ea bohlokoa haholo indastering lefatšeng ka bophara. Har'a mefuta e fapaneng ea mahlale a morao-rao a polasetiki, litšila tsa polasetiki tse recycling granulation li hlahella e le mokhoa o sebetsang, e sebetsang hantle, le mokhoa o sebetsang oa moruo o fetolang lisebelisoa tsa polasetiki tse lahliloeng hore e be li-granules tse ka sebelisoang hape. Li-granules tsena tse nchafalitsoeng li ka sebetsoa hape hore e be lihlahisoa tse ncha tsa polasetiki, ka maemo a ts'ebetso a bapisoang le a entsoeng ka thepa e sa tsoakoang, kahoo ho hlokomela ho potoloha ha mehloli ea 'nete le ho fokotsa moroalo oa tikoloho o bakoang ke litšila tsa polasetiki.

Zhuoyue, moetsi ea ka sehloohong oa lisebelisoa tsa extrusion, e ikemiselitse ho fana ka likhoele tsa tlhahiso ea granulation e phethahetseng bakeng sa mefuta eohle ea lipolasetiki tsa litšila, ho kenyelletsa le PP (Polypropylene), PE (Polyethylene), LDPE (Polyethylene ea Boima bo tlase), PET (Polyethylene Terephthalate), PS (Polystyrene), ABS (Acrylonitrile Butadiene Styrene), le ho feta. Ka theknoloji e tsoetseng pele ea extrusion le tsebo e tebileng ea ho tsosolosa polasetiki, Li-extruder tsa Zhuoyue li etselitsoe ho tobana le mathata a ikhethang a litšila tsa polasetiki, ho fana ka bokgabane, ho baballa matla, and high-quality solutions for enterprises engaged in plastic recycling.

1. An Overview of Waste Plastic Recycling Granulation

Waste plastic recycling granulation is a specialized process that converts various forms of waste plastics—such as plastic bottles, lifilimi, lijana, scraps from production lines, and post-consumer plastic waste—into uniform, high-quality plastic granules through a series of mechanical and thermal treatments. These recycled granules, also known as regranulates or reprocessed plastic pellets, can be directly used in injection molding, extrusion, blow molding, and other plastic processing methods to produce new products, ranging from packaging materials and construction components to automotive parts and daily necessities.

The core value of waste plastic recycling granulation lies in its ability to address the dual challenges of plastic waste disposal and resource scarcity. Unlike traditional waste plastic disposal methods such as landfilling and incineration, which pose severe environmental risks, recycling granulation achieves true resource recycling:

Environmental Protection: Landfilling of plastic waste occupies valuable land resources and can lead to soil and groundwater pollution, as plastics are non-biodegradable and can release harmful substances over time. Incineration, on the other hand, emits toxic gases (such as dioxins and carbon monoxide) and particulate matter, contributing to air pollution and global warming. Recycling granulation reduces the amount of plastic waste entering landfills and incinerators, ho fokotsa tšilafalo ea tikoloho le tlhahiso ea khabone.
Paballo ea Mehloli: Lipolasetiki li entsoe ka mafura a sa keng a nchafatsoa (joalo ka oli le khase ea tlhaho). Ka ho tsosolosa litšila tsa polasetiki ho li-granules tse ka sebelisoang hape, tlhokahalo ea lisebelisoa tsa polasetiki tsa moroetsana e fokotsehile, ho boloka mehloli ea bohlokoa ea mesaletsa ea lintho tsa khale le ho fokotsa tšebeliso ea matla e amanang le tlhahiso ea polasetiki e sa tsoa tsoaloa. Ho hakanngoa hore ho tsosolosa tone e le 'ngoe ea polasetiki ho ka boloka ho fihlela 7.4 libarele tsa oli le ho fokotsa tlhahiso ea khabone ka 1.5 lithane.
Melemo ea Moruo: Li-granules tsa polasetiki tse nchafalitsoeng li theko e tlase haholo ho feta lisebelisoa tsa polasetiki tse sa tsoakoang, e fanang ka poloko e kholo ea litšenyehelo bakeng sa bahlahisi. Bakeng sa likhoebo tse nchafatsang, mokgoa wa ho bokella, ho sebetsa, 'me lipolasetiki tsa litšila tsa granulating li ka hlahisa phaello e tsitsitseng, ho theha menyetla e mecha ea moruo le maemo a mosebetsi. Ho phaella moo, linaha tse ngata le libaka li fana ka likhothaletso tsa leano (joalo ka lithuso le likheo tsa lekhetho) bakeng sa lik'hamphani tsa polasetiki tse nchafatsang, ho matlafatsa ts'ebetso ea moruo ea ho recycle granulation.

Leha ho le joalo, boleng ba granule ea polasetiki e sebelisoang hape le ts'ebetso ea lihlahisoa tsa ho qetela tse nchafalitsoeng li itšetlehile haholo ka ts'ebetso ea granulation le lisebelisoa tse sebelisoang.. Lintho tse kang mofuta le bohloeki ba litšila tsa polasetiki, bokgabane ba ho hlopha le ho hlwekisa, mocheso le taolo ya ho kuta nakong ya extrusion, 'me moralo oa extruder kaofela li na le tšusumetso e kholo ho boleng ba sehlahisoa sa ho qetela. Ka hona, ho hlahisa e bonolo, loketseng, e sebetsang hantle, ho baballa matla, e baballang tikoloho, mme ts'ebetso ea granulation e sebetsang hantle moruong e fetohile sepheo sa lipatlisiso le nts'etsopele indastering ea polasetiki ea botjha.

1.1 Litšobotsi tsa Bohlokoa tsa Lithako tsa Plastiki tse Recycled

Ts'ebetso ea li-granules tsa polasetiki tse tsosolositsoeng li amana haufi-ufi le mofuta oa litšila tsa polasetiki, tekanyo ya tshilafatso, le mokhoa oa granulation. Ka kakaretso, li-granules tsa boleng bo holimo li tlameha ho ba le litšobotsi tse latelang:

Boholo bo sa Tšoaneng ba Karolo: Boholo bo tsitsitseng ba likaroloana bo tiisa ho fepa ho tsitsitseng nakong ea ts'ebetso e latelang (joalo ka ho bopa ente le extrusion), ho ntlafatsa ho lekana le boleng ba sehlahisoa sa ho qetela. Boholo ba likaroloana tsa granules tse sebelisoang hape hangata bo pakeng tsa 2mm le 5mm, ho itšetlehile ka litlhoko tsa kopo.
Tšilafalo e tlaase: Lintho tse silafatsang tse kang litšila, lerole, makumane a tšepe, pampiri, le lisebelisoa tse ling tseo e seng tsa polasetiki li ka ama haholo ts'ebetso ea li-granules tse tsosolositsoeng le sehlahisoa sa ho qetela. Ka hona, ho hlopha ka katleho le ho hloekisa litšila tsa polasetiki ho bohlokoa ho netefatsa maemo a tlase a litšila.
Plastiki e ntle le ts'ebetso ea ts'ebetso: Li-granules tse tsosolositsoeng li lokela ho ba le thepa e ntle ea ho qhibiliha le ho phalla, ho lumella ho sebetsa habonolo lihlahisoa tse ncha ntle le ho ama ts'ebetso ea ts'ebetso kapa boleng ba sehlahisoa. Sena se hloka taolo e nepahetseng ea mocheso le sekhahla sa ho kuta nakong ea ts'ebetso ea granulation ho qoba ho senyeha ho feteletseng ha sebopeho sa limolek'hule tsa polasetiki..
Thepa e tsitsitseng ea Mechini: Matla a tsitsinyehang, ho lelefatsa nakong ya kgefutso, matla a tshusumetso, le lisebelisoa tse ling tsa mechine ea li-granules tse tsosolositsoeng li lokela ho ba haufi ka hohle kamoo ho ka khonehang ho tsa lisebelisoa tsa moroetsana, ho netefatsa hore lihlahisoa tsa ho qetela tse sebelisoang hape li finyella litekanyetso tse hlokahalang tsa ts'ebetso.
Mongobo o Tlase: Mongobo o phahameng ka har'a li-granules tse tsosolositsoeng li ka baka liphoso tse kang li-bubble le mapetsong a sehlahisoa sa ho qetela nakong ea ts'ebetso.. Ka hona, drying steps are often required during the granulation process to reduce the moisture content to an acceptable level (typically below 0.5%).

1.2 Common Types of Waste Plastics for Granulation

Almost all types of thermoplastic plastics can be recycled and granulated, while thermosetting plastics (which cannot be melted and reprocessed) are not suitable for recycling granulation. The most common types of waste plastics used in recycling granulation include:

PP (Polypropylene): A widely used thermoplastic with good chemical resistance, mechanical properties, and processability. Common waste PP includes plastic buckets, lijana, caps, and production scraps. Recycled PP granules are often used to produce plastic pipes, auto parts, and packaging materials.
PE (Polyethylene): Divided into LDPE (Polyethylene ea Boima bo tlase) and HDPE (High-Density Polyethylene). LDPE is commonly used in plastic films, mekotlana, and bottles, ha HDPE e sebelisoa ka libarele, liphaephe, le lijana. Li-granules tsa PE tse tsosolositsoeng li loketse ho hlahisa lifilimi tsa polasetiki, liphaephe, le lihlahisoa tse entsoeng ka ente.
PET (Polyethylene Terephthalate): Se bonaletsang, polasetiki e thata e sebelisoang hangata ka libotlolong tsa seno, phuthelo ya dijo, le lihlahisoa tsa fiber. Li-granules tsa PET tse tsosolositsoeng li sebelisoa haholo tlhahisong ea likhoele tsa polyester, libotlolo tsa polasetiki, and packaging materials.
PS (Polystyrene): E fumaneha ka thata (joalo ka likopi tsa foam, lijana tsa lijo, le lintho tsa ho bapala tsa polasetiki) le foam (EPS, polystyrene e atolositsoeng) mefuta. Li-granules tsa PS tse tsosolositsoeng li ka sebelisoa ho hlahisa lintho tsa ho bapala tsa polasetiki, lisebelisoa tse khabisitsoeng, le lihlahisoa tsa foam.
ABS (Acrylonitrile Butadiene Styrene): Plastiki e sebetsang hantle e nang le tšusumetso e ntle, ho tiea, le ho hanyetsa mocheso. ABS ea litšila e tloaelehileng e kenyelletsa likhetla tsa polasetiki tsa lihlahisoa tsa elektroniki, auto parts, le lintho tsa ho bapala. Li-granules tsa ABS tse tsosolositsoeng li sebelisoa ho hlahisa likhetla tsa lihlahisoa tsa elektroniki, auto parts, le likarolo tse entsoeng ka ente.

Mehala ea tlhahiso ea granulation ea Zhuoyue e etselitsoe ho sebetsana le lipolasetiki tsohle tse boletsoeng ka holimo., e nang le litlhophiso tsa lisebelisoa tse ikhethileng ho fihlela litlhoko tse ikhethang tsa ts'ebetso ea mefuta e fapaneng ea polasetiki.

2. The Waste Plastic Recycling Granulation Process

Ts'ebetso ea granulation ea litšila ea polasetiki ea litšila hangata e na le mehato e mengata ea bohlokoa: ho bokelloa le ho hlopha litšila tsa polasetiki, ho hloekisa, ho thuba, ho omisa, extrusion granulation, phodiso, le ho poma. Mohato o mong le o mong o phetha karolo ea bohlokoa ho netefatsa boleng ba li-granules tsa ho qetela tse sebelisoang hape. Litekanyetso tse khethehileng tsa ts'ebetso li ka fapana ho latela mofuta oa polasetiki ea litšila, tekanyo ya tshilafatso, le boleng bo lakatsehang ba li-granules tse tsosolositsoeng.

2.1 Ho bokella le ho Hlopha

Mohato oa pele oa ts'ebetso ea ho bokelloa ha granulation ke ho bokella le ho hlopha litšila tsa polasetiki. Lipolasetiki tsa litšila li bokelloa mehloling e fapaneng, ho kenyeletsa le malapa, liindasteri, libaka tsa khoebo, le mela ea tlhahiso. Ka lebaka la mefuta e mengata ea litšila tsa polasetiki le ho ba teng ha litšila, ho hlopha ho bohlokoa ho netefatsa boleng ba li-granules tse nchafalitsoeng.

Ho hlopha ho ka etsoa ka letsoho kapa ka mochini. Ho hlopha ka letsoho ho loketse ts'ebetso e nyane ea ho e sebelisa hape ho kenyelletsa ho arola mefuta e fapaneng ea lipolasetiki, ho tlosa ditshila tse senang polasetiki (joalo ka tšepe, pampiri, khalase, le litšila tsa lintho tse phelang), le ho hlopha lipolasetiki ka mebala le boleng. Ho hlopha ka mechine, on the other hand, e sebetsa hantle ebile e loketse lits'ebetso tse kholo, ka ho sebedisa dithekenoloji joalo ka karohano ya ditsietsi (karohano ya ho teba), karohano ea makenete, karohano ea electrostatic, le ho hlopha infrared ho arola mefuta e fapaneng ea polasetiki le ho tlosa litšila.

Ho hlopha ka katleho ho bohlokoa hobane ho kopanya mefuta e fapaneng ea polasetiki ho ka lebisa phokotsong e kholo ea ts'ebetso ea li-granules tse nchafalitsoeng.. Ka mohlala, ho kopanya PP le PET ho ka baka karohano ea mekhahlelo nakong ea extrusion, ho fella ka polasetiki e futsanehileng le thepa ea mochini ea li-granules.

2.2 Ho hloekisa

Ka mor'a ho hlopha, li-plastiki tse litšila lia hloekisoa ho tlosa litšila tse ka holimo tse kang litšila, lerole, oli, mafura, masalla a dijo, le li-label. Mokhoa oa ho hloekisa hangata o kenyelletsa mehato e mengata:

Ho hloekisa pele: Ho tlosa ditshila tse kgolo (joalo ka labels, caps, le likhechana tsa tšepe) le ditshila tse mahwahla ka borashe, foka, kapa ho kotula ka letsoho.
Ho hlatsoa: Ho kenya litšila tsa polasetiki ka har'a tharollo ea ho hloekisa (hangata metsi a nang le sesepa kapa alkali) ho tlosa oli, mafura, le masalla a lijo. Ho ferekanngoa kapa ho hloekisa ka ultrasonic ho ka sebelisoa ho ntlafatsa phello ea ho hloekisa.
Ho hlatsoa: Rinsing the cleaned plastics with clean water to remove any remaining cleaning solution and contaminants.
Dewatering: Removing excess water from the cleaned plastics using centrifuges, dewatering machines, or air drying to reduce the moisture content and facilitate subsequent processing.

The cleaning effect directly affects the quality of the recycled granules. Inadequate cleaning can lead to contamination of the granules, affecting their processability and mechanical properties. Ka mohlala, oil and grease residues can cause poor adhesion between the plastic molecules during extrusion, resulting in low tensile strength of the granules.

2.3 Crushing

After cleaning and dewatering, the waste plastics are crushed into small pieces (flakes or fragments) using a crusher. Crushing helps to increase the surface area of the plastic, facilitating melting and mixing during the extrusion process. It also helps to remove any remaining small contaminants that may be embedded in the plastic.

The type of crusher used depends on the type and form of the waste plastic. Common types of crushers include jaw crushers, hammer crushers, blade crushers, and granulators. For flexible plastics (such as plastic films and bags), blade crushers are typically used, while for rigid plastics (such as plastic bottles and containers), hammer crushers or jaw crushers are more suitable. The size of the crushed plastic pieces is usually between 5mm and 20mm, depending on the type of extruder used and the desired granule size.

2.4 Ho omisa

Even after dewatering, the crushed plastic pieces may still contain a certain amount of moisture. High moisture content can lead to defects such as bubbles, cracks, and poor surface quality in the recycled granules during extrusion. Ka hona, a drying step is necessary to reduce the moisture content of the crushed plastic pieces to an acceptable level (typically below 0.5%).

Common drying methods include hot air drying, vacuum drying, and infrared drying. Hot air drying is the most widely used method, which involves passing hot air (at a temperature of 80-120°C) through the crushed plastic pieces to evaporate the moisture. The drying time and temperature depend on the type of plastic and the initial moisture content. Ka mohlala, PET is more sensitive to moisture and requires higher drying temperatures (120-160°C) and longer drying times to ensure complete moisture removal.

2.5 Extrusion Granulation

Extrusion granulation is the core step in the waste plastic recycling granulation process. It involves melting, ho kopanya, and homogenizing the dried crushed plastic pieces using an extruder, then extruding the molten plastic through a die to form continuous strands, which are subsequently cooled and cut into uniform granules.

The extruder is the key equipment in this step, and its performance directly determines the quality and efficiency of the granulation process. There are two main types of extruders used in waste plastic recycling granulation: twin-screw extruders and single-screw extruders. Each type has its own advantages and is suitable for different types of waste plastics, as detailed in Section 3.

During extrusion granulation, several key process parameters need to be precisely controlled:

Temperature: The temperature of the extruder barrel and die is critical for melting the plastic and ensuring good mixing and homogenization. Different types of plastics have different melting points, and the barrel temperature is typically set 10-30°C above the melting point of the plastic to ensure complete melting. Ka mohlala, the barrel temperature for PP is usually 170-220°C, while for PET it is 260-280°C. Excessively high temperatures can cause thermal degradation of the plastic, leading to a reduction in the mechanical properties of the recycled granules, while excessively low temperatures can result in incomplete melting and poor mixing.
Shear Rate: The shear rate is determined by the screw speed and the screw design. A suitable shear rate helps to homogenize the molten plastic, disperse any remaining contaminants, and improve the plasticity of the granules. Leha ho le joalo, excessively high shear rates can cause mechanical degradation of the plastic molecular structure, leading to reduced performance.
Screw Speed: The screw speed affects the throughput, melting efficiency, and mixing quality. Higher screw speeds can increase the throughput but may reduce the melting and mixing efficiency, while lower screw speeds can improve the mixing quality but reduce the throughput. The optimal screw speed depends on the type of plastic, the extruder type, and the desired granule quality.
Extrusion Pressure: The extrusion pressure is determined by the die design, screw speed, and material viscosity. Stable extrusion pressure ensures uniform strand formation and consistent granule size. Excessively high pressure can cause die blockage, athe khatello e tlase haholo e ka fella ka likhoele tse sa lekanang.

2.6 Ho pholisa le ho Seha

Ka mor'a extrusion ka lefu, likhoele tsa polasetiki tse tsoelang pele lia pholisoe ho li tiisa. Ho pholisa ho ka etsoa ka ho futhumatsa moea kapa ho futhumatsa metsi. Pholiso ea metsi e sebetsa hantle haholoanyane 'me e sebelisoa haholo lits'ebetsong tse kholo tsa granulation, Ho kenyelletsa ho fetisa likhoele ka tanka ea metsi kapa sefafatsi sa metsi ho li pholisa kapele mocheso oa kamore. Pholiso ea moea e loketse lits'ebetso tse nyane kapa lipolasetiki tse utloang metsi (joalo ka lipolasetiki tse ling tsa boenjiniere).

Hang ha likhoele li pholile 'me li tiisitsoe, li khaola ka li-granules tse tšoanang ho sebelisa pelletizer. Pelletizer e atisa ho kenngoa ha ho tsoa mochine o pholileng 'me e ka fetoloa ho laola bolelele ba li-granules. (hangata pakeng tsa 2mm le 5mm). Mefuta e tloaelehileng ea li-pelletizers e kenyelletsa strand pelletizers, li-pelletizers tsa metsi, le li-pelletizer tse ka tlas'a metsi. Li-pelletizer tsa Strand ke mofuta o sebelisoang ka ho fetesisa bakeng sa litšila tsa polasetiki ea litšila, kaha li bonolo ka sebopeho, bonolo ho sebetsa, 'me e loketse mefuta e mengata ea polasetiki.

2.7 Screening le Packaging

Ka mor'a ho khaola, li-granules tse tsosolositsoeng li hlahlojoa ho sebelisoa skrine e sisinyehang ho tlosa granule efe kapa efe e kholo kapa e tlase., ho netefatsa boholo ba likaroloana tse tšoanang. Li-granules tse sirelelitsoeng li omisitsoe hape (ha ho hlokahala) ho tlosa mongobo ofe kapa ofe o monyetsoeng nakong ya ho hatsela, ebe li phutheloa ka mekotleng kapa lijaneng tse ngata bakeng sa polokelo le lipalangoang.

Ho paka ke mohato oa bohlokoa oa ho thibela tšilafalo le ho monya ha mongobo ha li-granules tse tsosolositsoeng.. Lisebelisoa tsa ho paka li lokela ho ba tse thibelang mongobo le ho hloeka, and the granules should be stored in a dry, ventilated, and clean warehouse to maintain their quality.

3. Extruder Selection for Waste Plastic Recycling Granulation

As mentioned earlier, the extruder is the core equipment in the waste plastic recycling granulation process. The selection of the right extruder depends on the type of waste plastic, the desired granule quality, the production volume, and the budget. There are two main types of extruders used in waste plastic recycling granulation: twin-screw extruders and single-screw extruders. Each type has its own unique advantages and is suitable for different applications.

3.1 Twin-screw Extruders for Recycling Granulation

Twin-screw extruders are widely used in the recycling granulation of engineering plastics and plastics with high contamination levels, such as ABS, PS, and PET. They consist of two parallel screws that rotate in the same direction (co-rotating) or opposite directions (counter-rotating) within a barrel. Li-extruder tsa "twin-screw" tse kopanyang li sebelisoa hangata ho nchafatsa polasetiki ka lebaka la bokhoni ba tsona ba ho kopanya le ho tsamaisa..

3.1.1 Melemo ea Bohlokoa ea Li-Twin-screw Extruders

Ho Fepa Lintho Tse Bonolo: Li-extruder tse peli-screw li na le bokhoni bo matla ba ho fetisa, e lumellang ho fepa habonolo ha likotoana tsa polasetiki tse pshatlehileng, le haeba di sa lekane ka sebopeho kapa di na le palo e itseng ya ditshila. Sena se fokotsa tlhokahalo ea ho sebetsa pele ho lisebelisoa le ho ntlafatsa katleho ea tlhahiso.
Nako e Khutšoane ea ho Lula ha Lintho: Nako ea bolulo ea thepa ka mafahla-screw extruder e khutšoanyane (ka tlwaelo 1-5 metsotso) ha e bapisoa le li-extruder tse nang le sekoahelo se le seng. Sena se thusa ho qoba ho senyeha ha mocheso oa polasetiki, haholo-holo bakeng sa lipolasetiki tse sa utloeng mocheso joalo ka PET le ABS, e ka senyehang ha bonolo ha e le mochesong o phahameng nako e telele. Short residence time also reduces energy consumption and improves production efficiency.
Excellent Venting Effect: Twin-screw extruders are equipped with venting ports that allow for the removal of moisture, volatile gases, and air from the molten plastic. The meshing part of the screws provides effective mixing, and the self-cleaning function of the venting section ensures that the material can achieve complete surface renewal, allowing for efficient removal of volatile substances. This helps to improve the quality of the recycled granules by reducing the number of bubbles and defects.
Superior Mixing and Plasticizing Effect: The co-rotating twin-screw extruders have strong shear and mixing capabilities, which can effectively homogenize the molten plastic, disperse contaminants, and mix additives (such as stabilizers, antioxidants, and colorants) uniformly. This ensures that the recycled granules have consistent properties and good processability.
Low Specific Power Consumption: Despite their high performance, twin-screw extruders have low specific power consumption (power consumption per unit output), making them more energy-efficient compared to single-screw extruders for certain applications. This helps to reduce operating costs for recycling enterprises.
High Volume Power: Twin-screw extruders have a high volume power (power per unit volume of the barrel), which means they can process a large amount of material in a small space. This makes them suitable for large-scale production operations with limited space.

3.1.2 Suitable Applications for Twin-screw Extruders

Twin-screw extruders are particularly suitable for the recycling granulation of the following plastics:

ABS: Plastiki e sebetsang hantle haholo e sebelisoang haholo lihlahisoa tsa elektronike, auto parts, le lintho tsa ho bapala. ABS e utloa mocheso 'me e hloka nako e khutšoanyane ea ho lula le ho kopanya hantle, ho etsa li-fahla-screw extruders khetho e nepahetseng.
PS: PS ka bobeli e thata le e foam e ka sebelisoa hape ho sebelisoa li-extruder tsa mafahla. Bokhoni ba ho kopanya bo holimo ba li-twin-screw extruder bo thusa ho qhala lisele tse setseng tsa foam le litšila., ho netefatsa boleng bo botle ba granule.
PET: PET e tsotella haholo mongobo le mocheso, 'me e hloka taolo e nepahetseng ea mocheso le nako e khutšoanyane ea bolulo. Li-extruder tse peli tse nang le bokhoni bo botle ba ho kenya moea le ho laola mocheso li loketse PET ea ho tsosolosa granulation..
Lipolasetiki tsa Boenjiniere: Li-plastiki tse ling tsa boenjiniere tse kang PC (Polycarbonate), PA (Polyamide), le POM (Polyoxymethylene) e ka boela ea sebelisoa hape ho sebelisoa li-extruder tse mafahla, ka lebaka la bokhoni ba bona bo holimo ba ho kopanya le ho etsa polasetiki.

3.2 Li-Extruder tse nang le sekoahelo se le seng bakeng sa ho Recycling Granulation

Li-extruder tse nang le sekoahelo se le seng li bonolo haholoanyane ka sebopeho, theko e tlase, le bonolo ho boloka bapisoa le mafahla-screw extruders. Li na le screw e le 'ngoe e potolohang ka har'a moqomo, ho tsamaisa le ho qhibilihisa sesebedisoa ka ho hohlana le ho kuta pakeng tsa screw le barrel. Li-extruder tse nang le sekoaelo se le seng li sebelisoa haholo molemong oa ho nchafatsa lipolasetiki tsa sepheo se akaretsang joalo ka PP., PE, le LDPE.

3.2.1 Melemo ea Bohlokoa ea Li-Extruder tsa Single-screw

Bolelele bo Khutšoane ba Screw le Nako ea Bolulo: Li-extruder tsa "screw" tse nang le "single-screw extruder" hangata li na le bolelele bo bokhuts'oane ba sekoti ha se bapisoa le li-extruder tse peli, e bakang nako e kgutshwane ya ho dula ha thepa. Sena se thusa ho qoba ho senyeha ha mocheso oa polasetiki, haholo-holo bakeng sa li-plastiki tse bonolo tse kang PE le LDPE, which have lower melting points and are prone to degradation.
Cost-Effective: Waste plastic recycling often involves materials with high levels of contaminants, which can cause significant wear and tear on the extruder screw and barrel. Single-screw extruders are simpler in structure and use less expensive materials, making them more cost-effective to replace and maintain compared to twin-screw extruders. This is particularly important for small and medium-sized recycling enterprises with limited budgets.
Suitable for Soft Plastics: The material conveying efficiency of single-screw extruders depends on the friction performance of the solid material and the viscosity of the melt. Soft plastics such as PP, PE, and LDPE have good friction performance and low melt viscosity, making them ideal for processing with single-screw extruders. These plastics can be conveyed and melted efficiently, ho netefatsa boleng bo botle ba granule.
Simple Operation and Maintenance: Single-screw extruders have a simple structure, with fewer moving parts, making them easy to operate and maintain. This reduces the need for skilled operators and lowers maintenance costs, which is beneficial for small-scale recycling operations.

3.2.2 Suitable Applications for Single-screw Extruders

Single-screw extruders are particularly suitable for the recycling granulation of the following plastics:

PP (Polypropylene): PP is a soft plastic with good friction performance and processability, making it ideal for processing with single-screw extruders. Recycled PP granules produced using single-screw extruders have good mechanical properties and can be used in a wide range of applications.
PE (Polyethylene): Both LDPE and HDPE are suitable for processing with single-screw extruders. LDPE, in particular, is a soft plastic with low melt viscosity, which can be conveyed and melted efficiently by single-screw extruders. Recycled PE granules are widely used in the production of plastic films and pipes.
LDPE (Polyethylene ea Boima bo tlase): LDPE is commonly used in plastic films and bags, which are easy to crush and process. Single-screw extruders are ideal for LDPE recycling granulation, as they can handle the soft material efficiently and cost-effectively.

3.3 Key Factors for Extruder Selection

When selecting an extruder for waste plastic recycling granulation, the following key factors should be considered:

Type of Waste Plastic: As discussed earlier, twin-screw extruders are suitable for engineering plastics (ABS, PS, PET) and plastics with high contamination levels, athe li-extruder tse nang le sekoaelo se le seng li loketse lipolasetiki tsa morero o akaretsang (PP, PE, LDPE).
Bolumo ba Tlhahiso: Bakeng sa tlhahiso e kholo (ho feta 500kg/h), mafahla-screw extruders ba loketse haholoanyane ka lebaka la ho throughput bona phahameng le bokgoni. Bakeng sa tlhahiso e nyane (ka tlase ho 200kg/h), li-extruder tsa single-screw li na le litšenyehelo tse ngata ebile lia sebetsa.
Litlhoko tsa Boleng ba Granule: Haeba li-granules tsa boleng bo holimo tse nang le thepa e ts'oanang le tšilafalo e tlase lia hlokahala (joalo ka likarolo tsa likoloi le lihlahisoa tsa elektroniki), mafahla-screw extruders ke khetho e ntle ka lebaka la bokhoni ba bona ba ho kopanya le ho etsa polasetiki. Bakeng sa likopo tse akaretsang (joalo ka lifilimi tsa polasetiki le lihlahisoa tse entsoeng ka ente ea boemo bo tlase), li-extruder tse nang le sekoahelo se le seng li ka fihlela litlhoko ka theko e tlase.
Tekanyetso: Li-extruder tse peli-screw li bitsa chelete e ngata ho feta li-extruder tsa single-screw, both in terms of initial investment and maintenance costs. Ka hona, enterprises with limited budgets may prefer single-screw extruders for general-purpose plastic recycling.
Energy Consumption: Bakeng sa tlhahiso e kholo, energy consumption is an important consideration. Twin-screw extruders have lower specific power consumption, making them more energy-efficient for high-volume operations. Single-screw extruders may be more energy-efficient for small-scale operations due to their simpler structure.

4. Zhuoyue Extruder Series for Waste Plastic Recycling Granulation

Zhuoyue offers a comprehensive range of extruders specifically designed for waste plastic recycling granulation, including twin-screw extruders and single-screw extruders. The extruder series are tailored to meet the specific needs of different types of waste plastics, production volumes, and granule quality requirements, ho kopanya tshebetso e phahameng, bokgabane, ho baballa matla, le ho boloka litšenyehelo. The main extruder series akarelletsa ZTE series le HTE series, e 'ngoe le e' ngoe e na le likarolo tse ikhethang le melemo ho lumellana le maemo a fapaneng a ts'ebeliso.

4.1 Likarolo tsa Botekgeniki tsa Core tsa Zhuoyue Extruders

Li-extruder tsohle tsa Zhuoyue bakeng sa granulation ea litšila tsa polasetiki li arolelana likarolo tsa mantlha tsa tekheniki tse li etsang hore e be tse loketseng maemo a thata a polasetiki., joalo ka maemo a phahameng a tšoaetso, libopeho tse sa tloaelehang tsa lintho, le mefuta e fapaneng ea thepa:

Kaho e Matla: Li-extruder tsa Zhuoyue li hahiloe ka thepa ea boleng bo holimo (joalo ka tšepe ea alloy bakeng sa likurufu le libarele) ho mamella matsapa a bakoang ke ditshila tsa dipolasitiki. Li-screws le libarele li tšoaroa ka phekolo e khethehileng ea holim'a metsi (joalo ka nitriding le hard chrome plating) ho ntlafatsa bophelo ba bona ba ts'ireletso le ts'ebeletso ea bona.
Taolo e Nepahetseng ea Mocheso: Li-extruders li na le lisebelisoa tse tsoetseng pele tsa ho laola mocheso, ho kenyeletsa libaka tse futhumatsang le libaka tsa ho futhumatsa, ho netefatsa taolo e nepahetseng ea moqomo le mocheso o shoang. Sena se thusa ho qoba ho senyeha ha mocheso oa polasetiki le ho netefatsa ho qhibiliha ka ho feletseng le ho kopanya.
Phetiso e Sebetsang le Ho Kopanya: Meralo ea li-screw e ntlafalitsoe bakeng sa tšebeliso ea litšila ea polasetiki, e nang le bokhoni bo matlafalitsoeng ba ho fetisa le bokhoni ba ho kopanya. Li-extruder tsa Twin-screw li na le li-screws tse potolohang hammoho tse nang le lintlha tse ntlafalitsoeng tsa sefofane ho netefatsa ho kopanya ho holimo le ho homogenization., athe li-extruder tse nang le sekoaelo se le seng li na le li-screw tse etselitsoeng ka ho khetheha ho ntlafatsa bokhoni ba ho tsamaisa lipolasetiki tse bonolo.
Ts'ebetso e ntle ea Venting: Twin-screw extruders are equipped with multiple venting ports to remove moisture, volatile gases, and air from the molten plastic, ensuring high-quality granules with minimal defects. The self-cleaning function of the venting section ensures efficient venting even with contaminated materials.
Energy-Saving Design: Zhuoyue extruders adopt energy-saving technologies such as variable frequency drives (VFD) and optimized motor configurations to reduce energy consumption. This helps to lower operating costs for recycling enterprises.
Easy Operation and Maintenance: The extruders are designed with user-friendly interfaces and simple structures, making them easy to operate and maintain. The screws and barrels can be easily disassembled for cleaning and replacement, reducing downtime.
Customizable Configurations: Zhuoyue extruders can be customized with different screw lengths, diameters, and configurations to meet the specific needs of different types of waste plastics and production volumes. Ka mohlala, extruders for PET recycling can be equipped with special drying systems and venting ports to ensure complete moisture removal.

4.2 ZTE Series Extruders

The ZTE series is Zhuoyue’s cost-effective extruder series, designed for small and medium-sized recycling enterprises and general-purpose waste plastic recycling granulation. This series offers excellent cost-performance ratio, with parameters designed to suit most common waste plastics, ho kenyelletsa le PP, PE, LDPE, and general-purpose ABS and PS. The ZTE series includes both single-screw and twin-screw extruders, providing flexible options for different applications.

4.2.1 Key Features of ZTE Series Extruders

Excellent Cost-Performance Ratio: The ZTE series is designed to provide reliable performance at a competitive price, making it the ideal choice for enterprises with limited budgets or small-scale production needs. The initial investment and maintenance costs are significantly lower than high-end extruders, while still meeting the basic requirements of waste plastic recycling granulation.
Versatile Parameter Design: The parameters of the ZTE series are designed to suit most common waste plastics, ho kenyelletsa le PP, PE, LDPE, ABS, le PS. This versatility allows enterprises to process multiple types of waste plastics with a single extruder, improving production flexibility and reducing equipment investment.
Reliable Operation: The ZTE series adopts a reliable standard transmission system and simple structure, ensuring stable operation even in harsh recycling environments. The screws and barrels are designed to handle contaminants in waste plastics, reducing the risk of equipment failure.
Low Maintenance Costs: The simple structure of the ZTE series makes it easy to maintain, with fewer moving parts and lower maintenance requirements. The screws and barrels can be easily replaced when worn, reducing downtime and maintenance costs.
Suitable for Small to Medium-Scale Production: The ZTE series is available in a range of sizes, with throughputs ranging from 50kg/h to 500kg/h, making it suitable for small to medium-scale recycling operations.

4.2.2 ZTE Series Model Parameters

The ZTE series includes both single-screw and twin-screw extruders, with parameters tailored to different types of waste plastics. The following table details the parameters of the ZTE series twin-screw extruders, suitable for ABS, PS, and PET recycling granulation:

Mohlala	Torque e khethehileng (N.m/Cm³)	Matla a motlakase (Kw)	Output speed（rpm）	Slot depth ratio D0/Di	Suitable Plastics
25	6	7.5	600	1.55	PS, Small-scale ABS
35	6	18.5	600	1.55	PS, ABS, LDPE
50	6	55	600	1.55/1.68	ABS, PS, PET (Small-scale)
65	6	110	600	1.55/1.68	ABS, PS, PET
75	6	160	600	1.55/1.68	ABS, PS, PET, PP
95	6	300	600	1.55/1.68	ABS, PS, PET, PP, PE

The ZTE series single-screw extruders are mainly used for PP, PE, and LDPE recycling granulation, with parameters optimized for soft plastics. The screws are designed with enhanced conveying capacity to handle the irregular shapes of crushed plastic films and bottles, ensuring efficient production.

4.2.3 Application Scenarios for ZTE Series

The ZTE series is ideal for the following application scenarios:

Small and medium-sized recycling enterprises with limited budgets.
General-purpose waste plastic recycling, ho kenyelletsa le PP, PE, LDPE, ABS, le PS.
Production of general-purpose recycled granules for plastic films, low-grade injection-molded products, and construction components.
Enterprises new to plastic recycling, thanks to the easy operation and low maintenance requirements of the ZTE series.

4.3 HTE Series Extruders

The HTE series is Zhuoyue’s mid-range extruder series, designed to bridge the gap between cost-effective extruders (such as ZTE series) and high-end extruders. This series combines high performance with high cost-effectiveness, delivering higher output while reducing energy consumption. The HTE series includes both twin-screw and single-screw extruders, suitable for medium to large-scale waste plastic recycling granulation.

4.3.1 Key Features of HTE Series Extruders

Balanced Performance and Cost-Effectiveness: The HTE series offers higher performance than the ZTE series, including better mixing capabilities, tlhahiso e phahameng, and more precise temperature control, while maintaining a competitive price. This makes it suitable for enterprises that require higher granule quality but do not want to invest in high-end extruders.
Energy-Saving and High Output: The HTE series is optimized for energy efficiency, with advanced motor configurations and variable frequency drives (VFD) to reduce energy consumption. At the same time, the extruders have higher throughput, allowing for medium to large-scale production (500kg/h to 1000kg/h) with lower energy costs.
Reasonable Torque and Power Configuration: The HTE series has a reasonable torque and power configuration, ensuring stable and efficient production even when processing plastics with high contamination levels or varying properties. The twin-screw extruders have higher torque density, making them suitable for processing engineering plastics such as ABS and PET, while the single-screw extruders are optimized for soft plastics such as PP and PE.
Dual-Speed Options for Partial Models: Some models of the HTE series are equipped with dual-speed options, allowing for flexible adjustment of the screw speed to suit different types of plastics and production requirements. This expands the application range of the extruders, making them suitable for multiple plastic types.
Enhanced Wear Resistance: The screws and barrels of the HTE series are made of high-quality alloy steel and treated with advanced surface treatments to improve their wear resistance, ensuring a long service life even in harsh recycling environments.
Advanced Control System: The HTE series is equipped with advanced PLC control systems, allowing for automatic control of temperature, screw speed, extrusion pressure, le likarolo tse ling tsa bohlokoa. Sena se ntlafatsa botsitso le botsitso ba ts'ebetso ea granulation, ho netefatsa boleng bo tšoanang ba granule.

4.3.2 HTE Series Model Parameters

The HTE series twin-screw extruders e loketse ABS, PS, PET, PP, PE, and LDPE recycling granulation, e nang le li-parameter tse ntlafalitsoeng bakeng sa ts'ebetso e phahameng le bokhoni. Tafole e latelang e hlakisa li-parameter tse khethehileng:

Mohlala	Torque e khethehileng (N.m/Cm³)	Matla a motlakase (Kw)	Output speed（rpm）	Slot depth ratio D0/Di	Suitable Plastics	Phello (kg/h)
25	9	11	600	1.55	PS, ABS, LDPE	50-100
35	9	30	600	1.55	PS, ABS, PE, LDPE	100-200
35	9	45	1000	1.55	PS, ABS, PE, LDPE	200-300
50	9	75	600	1.55/1.68	ABS, PS, PET, PP	300-500
50	9	110	900	1.55/1.68	ABS, PS, PET, PP	500-700
65	9	160	600	1.55/1.68	ABS, PS, PET, PP, PE	700-900
65	9	220	900	1.55/1.68	ABS, PS, PET, PP, PE	900-1200
75	9	250	600	1.55/1.68	ABS, PS, PET, PP, PE, LDPE	1200-1500
75	9	315	900	1.55/1.68	ABS, PS, PET, PP, PE, LDPE	1500-1800
95	9	400	600	1.55/1.68	Lipolasetiki tsohle tse tloaelehileng tsa litšila	1800-2200

Letoto la HTE li-single-screw extruder li ntlafalitsoe bakeng sa PP, PE, and LDPE recycling granulation, e nang le ts'ebetso e phahameng le ts'ebeliso e ntle ea matla ha e bapisoa le letoto la ZTE. Li loketse tlhahiso e mahareng le e kholo ea li-granules tse nchafalitsoeng bakeng sa lifilimi tsa polasetiki, liphaephe, le lihlahisoa tse entsoeng ka ente.

4.3.3 Maemo a Kopo bakeng sa Letoto la HTE

Letoto la HTE le loketse maemo a latelang a ts'ebeliso:

Likhoebo tse mahareng ho isa ho tse kholo tse sebelisang botjha tse nang le litlhoko tse phahameng tsa boleng ba granule.
Ho tsosolosoa ha mefuta e mengata ea litšila tsa polasetiki, ho kenyelletsa le PP, PE, LDPE, ABS, PS, and PET.
Production of high-quality recycled granules for automotive parts, electronic product accessories, and high-grade injection-molded products.
Enterprises that focus on energy efficiency and cost reduction, thanks to the energy-saving design of the HTE series.

4.4 Customized Solutions from Zhuoyue

In addition to the standard ZTE and HTE series, Zhuoyue also provides customized extruder solutions for special waste plastic recycling needs. Ka mohlala:

Customized extruders for high-contamination waste plastics, equipped with enhanced filtering systems to remove contaminants.
Extruders for heat-sensitive plastics such as PET and PC, equipped with special drying systems and low-shear screws to avoid thermal degradation.
Complete recycling granulation production lines, including crushers, dryers, extruders, li-pellets, and screening equipment, ho fana ka tharollo ea sebaka se le seng bakeng sa likhoebo.

Setsebi sa Zhuoyue R&Sehlopha sa D se sebetsa haufi-ufi le bareki ho utloisisa litlhoko tsa bona tse khethehileng le ho fana ka litharollo tse lumellanang le litlhoko tsa bona tsa tlhahiso le tekanyetso.

5. Mekhoa e Molemo ka ho Fetisisa ea ho Hlakola Plastic Recycling Granulation e nang le Zhuoyue Extruders

Ho netefatsa ts'ebetso e ntle ka ho fetesisa le boleng ba granule ha o sebelisa li-extruder tsa Zhuoyue bakeng sa litšila tsa polasetiki tse sebelisang botjha granulation., mekhoa e latelang e molemo ka ho fetisisa e buelloa:

5.1 Tlhophiso e Nepahetseng le Tlhoekiso

Ho hlopha le ho hloekisa ka katleho ho bohlokoa ho fokotsa ho khathala le ho taboha ho extruder le ho netefatsa li-granules tsa boleng bo holimo.. Arola mefuta e fapaneng ea polasetiki ho qoba ho tsoakana, le ho tlosa litšila tse seng tsa polasetiki (joalo ka tšepe, pampiri, le khalase) ka moo ho ka kgonehang. Hloekisa ka ho feletseng litšila tsa polasetiki ho tlosa oli, mafura, le masalla a lijo, e ka amang phello ea ho kopanya le ho etsa polasetiki.

5.2 Ho Omisa ka ho Fetisisa

Netefatsa hore likotoana tsa polasetiki tse pshatlehileng li omisitsoe hantle ho fokotsa mongobo ho ea tlase 0.5%. Bakeng sa lipolasetiki tse sa utloeleng mongobo joalo ka PET, sebelisa ho omisa ka mocheso o phahameng (120-160°C) bakeng sa nako e lekaneng ho netefatsa ho tlosoa ha mongobo ka ho feletseng. Sena se thusa ho qoba li-bubble le likoli ho li-granules tse nchafalitsoeng.

5.3 Taolo e nepahetseng ea Parameter ea Ts'ebetso

Fetola li-parameter tsa extruder (joalo ka mocheso, screw speed, le khatello ea extrusion) ho ya ka mofuta wa polasetiki e senyehileng. Latela litlhophiso tse khothaletsoang tsa paramethara tse fanoeng ke Zhuoyue, 'me u etse liphetoho ho latela thepa ea sebele le boleng ba granule. Qoba lithempereichara tse phahameng ka ho feteletseng kapa likhahla tsa ho kuta, e ka bakang ho senyeha ha polasetiki.

5.4 Tlhokomelo ea Kamehla

Kamehla hlahloba le ho boloka extruder ho netefatsa ts'ebetso ea eona e tloaelehileng. Hloekisa li-screws le libarele khafetsa ho tlosa lintho tse bokeletsoeng kapa litšila. Hlahloba ho khathala ha li-screws le barrel, le ho li nkela sebaka ha ho hlokahala. Lubricate likarolo tse tsamaeang khafetsa ho fokotsa likhohlano le ho lelefatsa bophelo ba ts'ebeletso ea extruder.

5.5 Tšebeliso ea li-additives (Haeba ho Hlokahala)

Bakeng sa litšila tsa polasetiki tse nang le ho senyeha ho matla kapa ho se sebetse hantle, nahana ka ho eketsa li-additives tse kang stabilizers, antioxidants, le li-plasticizers ho ntlafatsa boleng ba li-granules tse nchafalitsoeng. Ikopanye le sehlopha sa tekheniki sa Zhuoyue ho khetha li-additives le litekanyetso tse nepahetseng.

6. Qetello

Granulation ea litšila ea polasetiki ea litšila ke theknoloji ea bohlokoa bakeng sa ho lemoha phepelo ea lisebelisoa le ts'ireletso ea tikoloho, e fanang ka bohlokoa ba moruo, tikoloho, le melemo ea sechaba. The quality and efficiency of the granulation process depend largely on the extruder used, and selecting the right extruder is essential for the success of a plastic recycling enterprise.

Zhuoyue’s ZTE series and HTE series extruders are specifically designed for waste plastic recycling granulation, ho kopanya tshebetso e phahameng, bokgabane, ho baballa matla, le ho boloka litšenyehelo. The ZTE series provides a cost-effective solution for small and medium-sized enterprises and general-purpose plastic recycling, while the HTE series offers balanced performance and cost-effectiveness for medium to large-scale production with higher quality requirements. With robust construction, precise temperature control, superior mixing capabilities, and customizable configurations, Zhuoyue extruders can handle all types of waste plastics, from PP and PE to ABS and PET, delivering high-quality recycled granules for a wide range of applications.

As a leader in extrusion technology, Zhuoyue is committed to providing advanced, reliable, and cost-effective solutions for the plastic recycling industry. With professional R&D, high-quality products, and comprehensive after-sales service, Zhuoyue helps enterprises unlock the full potential of waste plastic recycling, contributing to a more sustainable and environmentally friendly future.

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