Advanced Plastic Recycling Granulation: Technology, Equipment and Zhuoyue Extruder Solutions

In an era of increasing environmental awareness and stringent resource conservation policies, plastic recycling has become a critical focus for industries worldwide. Among the various plastic recycling technologies, waste plastic recycling granulation stands out as a practical, ua haujlwm tau zoo, and economically viable method that transforms discarded plastic materials into reusable granules. These recycled granules can be further processed into new plastic products, with performance levels comparable to those made from virgin materials, thus realizing true resource circulation and reducing the environmental burden caused by plastic waste.

Zhuoyue, a leading manufacturer of extrusion equipment, is committed to providing comprehensive recycling granulation production lines for all types of waste plastics, including PP (Polypropylene), PE (Polyethylene), LDPE (Low-Density Polyethylene), PET (u), PS (Polystyrene), ABS (Acrylonitrile Butadiene Styrene), and more. With advanced extrusion technology and in-depth expertise in plastic recycling, Zhuoyue’s extruders are tailored to meet the unique challenges of waste plastic granulation, delivering efficient, energy-saving, 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, films, thawv, 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, b, 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. Kev hlawv pov tseg, ntawm qhov tod tes, tso pa phem (xws li dioxins thiab carbon monoxide) thiab cov plua plav, ua rau huab cua paug thiab huab cua sov dua. Kev rov siv dua granulation txo cov yas pov tseg uas nkag mus rau hauv chaw pov tseg thiab chaw hlawv, txo kev paug ib puag ncig thiab pa carbon.
• Kev txuag peev txheej: Yas yog los ntawm roj fossil uas tsis rov siv tau (xws li roj thiab roj ntuj). Los ntawm kev rov siv yas pov tseg ua granules rov siv tau, kev xav tau yas tshiab raug txo, txuag cov peev txheej fossil muaj nqis thiab txo kev siv zog uas cuam tshuam nrog kev tsim yas tshiab. kwv yees tias kev rov siv dua ib tuj yas tuaj yeem txuag tau txog 7.4 barrels roj thiab txo pa carbon los ntawm 1.5 tons.
• Txiaj ntsig kev lag luam: Yas granules rov siv dua pheej yig dua yas tshiab, offering substantial cost savings for manufacturers. For recycling enterprises, the process of collecting, ua, and granulating waste plastics can generate stable profits, creating new economic opportunities and employment positions. Tsis tas li ntawd, many countries and regions offer policy incentives (such as subsidies and tax breaks) for plastic recycling enterprises, further enhancing the economic viability of recycling granulation.

However, the quality of recycled plastic granules and the performance of the final recycled products are highly dependent on the granulation process and equipment used. Factors such as the type and purity of waste plastic, the efficiency of sorting and cleaning, the temperature and shear control during extrusion, and the design of the extruder all have a significant impact on the final product quality. Therefore, developing a simple, yooj yim, ua haujlwm tau zoo, energy-saving, zoo rau ib puag ncig, thiab muaj txiaj ntsig nyiaj txiag tau dhau los ua lub ntsiab ntawm kev tshawb fawb thiab kev tsim kho tshiab hauv kev lag luam yas rov siv dua.

1.1 Cov yam ntxwv tseem ceeb ntawm cov granules yas rov siv dua

Kev ua tau zoo ntawm cov granules yas rov siv dua muaj kev sib raug zoo nrog hom yas pov tseg, qib ntawm kev contamination, thiab txheej txheem granulation. Feem ntau, granules rov siv zoo yuav tsum muaj cov yam ntxwv hauv qab no:

• Loj Particle Sib Xws: Qhov loj particle sib xws pab kom muaj kev pub zaub mov ruaj khov thaum ua haujlwm tom qab (xws li injection molding thiab extrusion), txhim kho kev sib xws thiab zoo ntawm cov khoom kawg. Qhov loj ntawm granules rov siv dua feem ntau yog 2mm txog 5mm, nyob ntawm qhov xav tau ntawm daim ntawv thov.
• Tsis muaj kev contamination: Cov khoom paug xws li av, hmoov av, metal fragments, ntawv, and other non-plastic materials can significantly affect the performance of recycled granules and the final product. Therefore, effective sorting and cleaning of waste plastic are essential to ensure low contamination levels.
• Good Plasticity and Processability: Recycled granules should have good melting properties and flowability, allowing for easy processing into new products without affecting the processing efficiency or product quality. This requires precise control of the temperature and shear rate during the granulation process to avoid excessive degradation of the plastic molecular structure.
• Stable Mechanical Properties: The tensile strength, elongation at break, impact strength, and other mechanical properties of recycled granules should be as close as possible to those of virgin materials, kom paub tseeb tias cov khoom rov siv kawg ua tau raws li cov qauv ua tau zoo.
• Cov ntsiab lus noo noo tsawg: Cov ntsiab lus noo siab hauv cov granules rov siv dua tuaj yeem ua rau muaj kab mob xws li cov nplaim thiab tawg hauv cov khoom kawg thaum ua haujlwm. Therefore, cov kauj ruam qhuav feem ntau yuav tsum tau ua thaum granulation kom txo cov noo noo mus rau qib uas txais tau (feem ntau qis dua 0.5%).

1.2 Cov Hom Yas Pov Tseg Rau Granulation

Kwv yees txhua hom yas thermoplastic tuaj yeem rov siv thiab granulated, thaum thermosetting yas (uas tsis tuaj yeem yaj thiab rov ua dua) tsis haum rau kev rov siv granulation. Cov hom yas pov tseg feem ntau siv hauv kev rov siv granulation suav nrog:

• PP (Polypropylene): Ib hom thermoplastic siv dav uas muaj kev tiv thaiv tshuaj zoo, cov yam ntxwv tshuab, thiab yooj yim ua haujlwm. Cov pov tseg PP nrov suav nrog cov thoob yas, thawv, caps, and production scraps. Recycled PP granules are often used to produce plastic pipes, auto parts, and packaging materials.
• PE (Polyethylene): Divided into LDPE (Low-Density Polyethylene) and HDPE (Polyethylene Ntau Zog). LDPE is commonly used in plastic films, o, and bottles, while HDPE is used in barrels, yeeb nkab, thiab thawv. Recycled PE granules are suitable for producing plastic films, yeeb nkab, and injection-molded products.
• PET (u): A transparent, rigid plastic commonly used in beverage bottles, ntim khoom noj khoom haus, and fiber products. Recycled PET granules are widely used in the production of polyester fibers, plastic bottles, and packaging materials.
• PS (Polystyrene): Available in rigid (such as foam cups, v, and plastic toys) and foam (EPS, expanded polystyrene) forms. Recycled PS granules can be used to produce plastic toys, decorative materials, and foam products.
• ABS (Acrylonitrile Butadiene Styrene): A high-performance plastic with good impact strength, rigidity, and heat resistance. Common waste ABS includes plastic shells of electronic products, auto parts, thiab cov khoom ua si. Cov granules ABS rov siv dua siv los tsim cov plhaub khoom hluav taws xob, auto parts, thiab cov khoom txhaj tshuaj.

Zhuoyue cov kab tsim granulation rov siv tau tsim los tswj tag nrho cov yas pov tseg uas tau hais los saum toj no, nrog cov cuab yeej kho kom haum rau cov kev xav tau tshwj xeeb ntawm ntau hom yas.

2. Cov txheej txheem Granulation Rov Siv Yas Pov Tseg

Txheej txheem granulation yas pov tseg feem ntau muaj ntau kauj ruam tseem ceeb: kev sau thiab cais yas pov tseg, ntxuav, crushing, qhuav, extrusion granulation, txias, and cutting. Txhua kauj ruam muaj lub luag haujlwm tseem ceeb hauv kev xyuas kom zoo ntawm cov granules rov siv dua. Cov txheej txheem tshwj xeeb yuav txawv raws li hom yas pov tseg, qib ntawm kev contamination, thiab qhov zoo uas xav tau ntawm cov granules rov siv dua.

2.1 Kev Sau thiab Cais

Qhov kauj ruam thawj hauv txheej txheem rov siv dua granulation yog kev sau thiab cais cov yas pov tseg.. Cov yas pov tseg raug sau los ntawm ntau qhov chaw, xws li tsev neeg, kev lag luam, cov chaw lag luam, thiab kab ntau lawm.. Vim muaj ntau yam yas pov tseg thiab muaj cov kab mob, kev cais yog qhov tseem ceeb kom ntseeg tau tias cov granules rov siv tau zoo..

Kev cais tuaj yeem ua tau los ntawm tes lossis tshuab.. Kev cais tawm tes haum rau kev rov siv me me thiab suav nrog kev cais ntau hom yas, tshem tawm cov kab mob tsis yog yas (xws li hlau, ntawv, iav, thiab pov tseg organic), thiab cais yas raws xim thiab zoo.. Kev cais tshuab, ntawm qhov tod tes, ua tau zoo dua thiab haum rau kev ua haujlwm loj, siv cov thev naus laus zis xws li kev cais ntom ntom (kev cais tawm ntawm qhov chaw ntim), kev cais hlau nplaum, kev cais hluav taws xob., and infrared sorting to separate different plastic types and remove contaminants.

Effective sorting is critical because mixing different types of plastics can lead to a significant reduction in the performance of the recycled granules. Piv txwv li, mixing PP and PET can cause phase separation during extrusion, resulting in poor plasticity and mechanical properties of the granules.

2.2 Kev ntxuav

Tom qab sorting, the waste plastics are cleaned to remove surface contaminants such as dirt, hmoov av, oil, grease, food residues, and labels. The cleaning process typically involves several steps:

• Pre-cleaning: Removing large contaminants (such as labels, caps, and metal fragments) and coarse dirt through brushing, blowing, or manual picking.
• Ntxuav: Soaking the waste plastics in a cleaning solution (usually water with detergent or alkali) to remove oil, grease, and food residues. Kev ntxuav nrog kev ntxhov siab lossis ultrasonic tuaj yeem siv los txhim kho qhov kev ntxuav zoo.
• Kev ntxuav: Ntxuav cov yas huv nrog dej huv kom tshem tawm cov tshuaj ntxuav thiab cov kab mob seem.
• Kev tshem dej: Tshem dej ntau dhau ntawm cov yas huv siv centrifuge, cov tshuab tshem dej, lossis qhuav cua kom txo cov noo noo thiab pab txhawb kev ua haujlwm tom ntej.

Kev ntxuav cuam tshuam ncaj qha rau zoo ntawm cov granules rov siv dua. Kev ntxuav tsis txaus yuav ua rau cov granules muaj kab mob, cuam tshuam rau lawv txoj kev ua haujlwm thiab cov yam ntxwv tshuab. Piv txwv li, Cov roj thiab roj nplaum seem tuaj yeem ua rau cov yas nplaum tsis zoo thaum extrusion, Ua rau cov granules muaj zog rub qis.

2.3 Crushing

Tom qab ntxuav thiab tshem dej, cov yas pov tseg raug crushed ua me me (flakes lossis fragments) siv crusher. Crushing pab nce qhov chaw nto ntawm yas, pab kom yaj thiab sib xyaw thaum extrusion. Nws kuj pab tshem tawm tej yam me me uas tseem tshuav nyob hauv yas.

Hom crusher siv nyob ntawm hom thiab hom yas pov tseg. Hom crusher nrov muaj jaw crushers, hammer crushers, blade crushers, thiab granulators. Rau yas hloov tau (xws li yas zaj duab xis thiab hnab), blade crushers feem ntau siv, thaum rau yas ruaj khov (xws li raj yas thiab thawv), hammer crushers lossis jaw crushers haum dua. Qhov loj ntawm cov yas crusher feem ntau yog 5mm txog 20mm, nyob ntawm hom extruder siv thiab qhov loj granule xav tau.

2.4 Drying

Txawm tom qab tshem dej, 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. Therefore, a drying step is necessary to reduce the moisture content of the crushed plastic pieces to an acceptable level (feem ntau qis dua 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. Piv txwv li, 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 yog kauj ruam tseem ceeb hauv txheej txheem rov siv yas pov tseg. Nws muaj xws li yaj, sib xyaw, thiab ua kom cov yas tawg qhuav sib npaug siv extruder, tom qab ntawd extruding yas yaj los ntawm ib lub die los tsim cov hlua txuas ntxiv, uas tom qab ntawd txias thiab txiav ua granules sib npaug.

Extruder yog lub cuab yeej tseem ceeb hauv kauj ruam no, thiab nws qhov kev ua tau zoo ncaj qha txiav txim siab qhov zoo thiab kev ua tau zoo ntawm txheej txheem granulation. Muaj ob hom extruders tseem ceeb siv hauv kev rov siv yas pov tseg granulation: ob lub nplhaib extruders thiab ib lub nplhaib extruders. Txhua hom muaj nws tus kheej qhov zoo thiab haum rau ntau hom yas pov tseg, raws li tau piav qhia hauv tshooj 3.

Thaum extrusion granulation, ntau yam tseem ceeb ntawm txheej txheem yuav tsum tswj kom raug:

• Kub: 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. Piv txwv li, 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. However, 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, while excessively low pressure can result in uneven strands.

2.6 Txias thiab txiav

After extrusion through the die, the continuous plastic strands are cooled to solidify them. Cooling can be done using air cooling or water cooling. Water cooling is more efficient and is widely used in large-scale granulation operations, involving passing the strands through a water tank or water spray to quickly cool them to room temperature. Air cooling is suitable for small-scale operations or for plastics that are sensitive to water (xws li qee yam yas engineering).

Once the strands are cooled and solidified, they are cut into uniform granules using a pelletizer. The pelletizer is typically installed at the exit of the cooling system and can be adjusted to control the length of the granules (usually between 2mm and 5mm). Common types of pelletizers include strand pelletizers, water ring pelletizers, and underwater pelletizers. Strand pelletizers are the most widely used type for waste plastic recycling granulation, as they are simple in structure, easy to operate, and suitable for most types of plastics.

2.7 Screening and Packaging

After cutting, the recycled granules are screened using a vibrating screen to remove any oversized or undersized granules, ensuring uniform particle size. The screened granules are then dried again (if necessary) to remove any moisture absorbed during cooling, then packaged into bags or bulk containers for storage and transportation.

Packaging is an important step to prevent contamination and moisture absorption of the recycled granules. The packaging materials should be moisture-proof and clean, 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. Muaj ob hom extruders tseem ceeb siv hauv kev rov siv yas pov tseg granulation: ob lub nplhaib extruders thiab ib lub nplhaib 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, thiab PET. They consist of two parallel screws that rotate in the same direction (co-rotating) or opposite directions (counter-rotating) within a barrel. Co-rotating twin-screw extruders are more commonly used in plastic recycling due to their superior mixing and conveying capabilities.

3.1.1 Key Advantages of Twin-screw Extruders

• Easy Material Feeding: Twin-screw extruders have a strong conveying capacity, which allows for easy feeding of crushed plastic pieces, even if they are irregular in shape or have a certain amount of contaminants. This reduces the need for pre-processing of the material and improves production efficiency.
• Short Material Residence Time: The residence time of the material in the twin-screw extruder is short (feem ntau 1-5 feeb) compared to single-screw extruders. This helps to avoid thermal degradation of the plastic, especially for heat-sensitive plastics such as PET and ABS, which can degrade easily when exposed to high temperatures for a long time. 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, thiab colorants) sib npaug. Qhov no xyuas kom cov granules rov siv dua muaj cov yam ntxwv ruaj khov thiab yooj yim ua haujlwm.
• Kev Siv Hluav Taws Xob Tshwj Xeeb Tsawg: Txawm tias lawv ua tau zoo, ob lub nplhaib extruders muaj kev siv hluav taws xob tshwj xeeb tsawg (kev siv hluav taws xob ib qho khoom tawm), ua rau lawv siv hluav taws xob zoo dua piv rau ib lub nplhaib extruders rau qee qhov kev siv. Qhov no pab txo nqi khiav haujlwm rau cov tuam txhab rov siv dua.
• Hwj Chim Ntau Ntau: Ob Lub Nplhaib Extruders muaj hwj chim ntau (Lub zog ib qho ntim ntawm lub thawv), uas txhais tau tias lawv tuaj yeem ua haujlwm ntau yam khoom hauv ib qho chaw me me. Qhov no ua rau lawv haum rau kev tsim khoom loj nrog chaw txwv.

3.1.2 Kev Siv Zoo Rau Cov Extruder Ob Lub Nplhaib

Cov Extruder Ob Lub Nplhaib tshwj xeeb haum rau kev rov ua dua cov granulation ntawm cov yas hauv qab no:

• ABS: Ib hom yas muaj zog uas siv dav hauv cov khoom hluav taws xob, auto parts, thiab cov khoom ua si. ABS muaj kev cuam tshuam rau kub thiab xav tau sijhawm nyob luv thiab sib xyaw zoo, ua rau ob lub tshuab extruders yog qhov kev xaiv zoo tshaj.
• PS: Ob hom yas ruaj khov thiab ua npuas tuaj yeem rov siv tau siv ob lub tshuab extruder. Kev sib xyaw zoo tshaj ntawm ob lub tshuab ua luam yeeb pab kom cov hlwb ua npuas thiab cov kab mob seem tawg, ua kom granule zoo zoo.
• PET: PET muaj kev cuam tshuam zoo rau dej thiab kub, thiab xav tau kev tswj kub kom raug thiab lub sijhawm nyob luv. Cov tshuab ob lub ntsia hlau uas muaj peev xwm tso cua tawm thiab tswj kub zoo haum rau PET rov siv granulation.
• Engineering plastics: Lwm yam yas tshuab xws li PC (Polycarbonate), PA (Polyamide), thiab POM (Polyoxymethylene) kuj rov siv tau siv ob lub tshuab extruder, ua tsaug rau lawv qhov kev sib xyaw thiab ua kom yas zoo dua.

3.2 Single-screw Extruders for Recycling Granulation

Single-screw extruders are simpler in structure, lower in cost, and easier to maintain compared to twin-screw extruders. They consist of a single screw that rotates within a barrel, conveying and melting the material through friction and shear between the screw and the barrel. Single-screw extruders are widely used in the recycling granulation of general-purpose plastics such as PP, PE, and LDPE.

3.2.1 Key Advantages of Single-screw Extruders

• Short Screw Length and Residence Time: Single-screw extruders typically have a shorter screw length compared to twin-screw extruders, resulting in shorter material residence time. This helps to avoid thermal degradation of the plastic, especially for soft plastics such as PE and 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, ua kom granule zoo zoo.
• 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, uas tuaj yeem thauj thiab yaj tau zoo los ntawm ib lub nplhaib extruders. Cov granules PE rov siv dua tau siv dav hauv kev tsim cov yas zaj duab xis thiab raj.
• LDPE (Low-Density Polyethylene): LDPE feem ntau siv hauv cov yas zaj duab xis thiab hnab, uas yooj yim crush thiab processed. Cov tshuab extruder ib lub nplhaib yog qhov zoo tshaj plaws rau LDPE rov ua dua cov granulation, vim lawv tuaj yeem tuav cov khoom mos tau zoo thiab pheej yig.

3.3 Cov ntsiab lus tseem ceeb rau kev xaiv Extruder

Thaum xaiv ib qho extruder rau kev rov siv yas pov tseg granulation, cov ntsiab lus tseem ceeb hauv qab no yuav tsum tau xav txog:

• Hom Yas Pov Tseg: Raws li tau tham ua ntej, cov extruders ob lub nplhaib haum rau cov yas engineering (ABS, PS, PET) thiab cov yas uas muaj qib contamination siab, thaum ib lub nplhaib extruders haum rau cov yas siv dav dav (PP, PE, LDPE).
• Ntau lawm ntim: Rau kev tsim khoom loj (ntau tshaj 500kg/h), Twin-screw extruders haum dua vim lawv muaj peev xwm ua tau zoo thiab ua haujlwm tau zoo. Rau kev tsim khoom me me (tsawg dua 200kg/h), single-screw extruders pheej yig dua thiab siv tau zoo dua.
• Granule Quality Requirements: Yog xav tau cov granules rov siv zoo uas muaj cov yam ntxwv sib npaug thiab tsis muaj kuab paug ntau (xws li rau cov khoom tsheb thiab cov khoom hluav taws xob), twin-screw extruders yog qhov zoo dua vim lawv muaj peev xwm sib xyaw thiab ua kom yas zoo dua. Rau kev siv dav dav (xws li yas zaj duab xis thiab cov khoom txhaj txhaj qis qib), single-screw extruders ua tau raws li cov kev xav tau nrog tus nqi qis dua.
• Pob nyiaj siv: Ob lub screw extruders kim dua ib tug screw, ob qho tib si hauv kev nqis peev thawj zaug thiab tus nqi kho. Therefore, Cov tuam txhab uas muaj nyiaj txiag tsawg tej zaum yuav nyiam extruders ib lub nplhaib rau kev rov siv yas dav dav.
• Kev siv hluav taws xob: Rau kev tsim khoom loj, Kev siv hluav taws xob yog ib qho tseem ceeb. Extruders ob lub nplhaib siv hluav taws xob tsawg dua, Ua rau lawv siv hluav taws xob zoo dua rau kev ua haujlwm ntau. Extruders ib lub nplhaib tej zaum yuav txuag hluav taws xob ntau dua rau cov haujlwm me me vim lawv cov qauv yooj yim dua.

4. Zhuoyue Extruder Series rau Kev Rov Siv Yas Pov Tseg Granulation

Zhuoyue muab ntau yam extruders tsim tshwj xeeb rau kev rov ua dua yas pov tseg granulation, Muaj ob lub nplhaib extruders thiab ib lub nplhaib extruder. Cov series extruder yog tsim tshwj xeeb rau cov kev xav tau tshwj xeeb ntawm ntau hom yas pov tseg, Qhov ntau ntawm kev tsim khoom, Thiab cov cai zoo ntawm granule, Ua ke kev ua tau zoo siab, m, energy-saving, Thiab kev txuag nqi. Cov series tseem ceeb ntawm extruder suav nrog ZTE series thiab HTE series, txhua tus muaj cov yam ntxwv tshwj xeeb thiab qhov zoo kom haum rau ntau yam kev siv.

4.1 Cov yam ntxwv tseem ceeb ntawm Zhuoyue Extruders

Tag nrho Zhuoyue extruders rau kev rov siv yas pov tseg thiab granulation muaj ib pawg tseem ceeb ntawm cov yam ntxwv tseem ceeb uas ua rau lawv haum rau cov xwm txheej nyuaj ntawm kev rov siv yas, xws li qib contamination siab, cov qauv khoom tsis sib xws, thiab cov yam ntxwv khoom sib txawv:

• Kev tsim kho ruaj khov: Zhuoyue extruders yog tsim nrog cov khoom zoo siab (xws li alloy steel rau screws thiab barrels) kom tiv taus kev puas tsuaj los ntawm cov kab mob hauv cov yas pov tseg. Cov screws thiab barrels tau kho nrog kev kho tshwj xeeb ntawm nto (xws li nitriding thiab hard chrome plating) txhawm rau txhim kho lawv qhov tiv taus hnav thiab lub neej siv.
• Kev Tswj Kub Kom Zoo: The extruders are equipped with advanced temperature control systems, including heating zones and cooling zones, to ensure precise control of the barrel and die temperature. This helps to avoid thermal degradation of the plastic and ensure complete melting and mixing.
• Efficient Conveying and Mixing: The screw designs are optimized for waste plastic recycling, with enhanced conveying capacity and mixing capabilities. Twin-screw extruders feature co-rotating screws with optimized flight profiles to ensure superior mixing and homogenization, while single-screw extruders have specially designed screws to improve conveying efficiency for soft plastics.
• Excellent Venting Performance: 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. Piv txwv li, 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, including 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, including PP, PE, LDPE, ABS, thiab 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:

Model	torque tshwj xeeb (N.m/Cm³)	Lub zog tsav loj (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, including PP, PE, LDPE, ABS, thiab 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, kev ua tau zoo dua, 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, and other key parameters. This improves the stability and consistency of the granulation process, ensuring uniform granule quality.

4.3.2 HTE Series Model Parameters

H, PS, PET, PP, PE, and LDPE recycling granulation, T. E:

Model	torque tshwj xeeb (N.m/Cm³)	Lub zog tsav loj (kW)	Output speed（rpm）	Slot depth ratio D0/Di	Suitable Plastics	Throughput (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	All common waste plastics	1800-2200

s, PE, and LDPE recycling granulation, e. r, yeeb nkab, and injection-molded products.

4.3.3 i

e:

• s.
• Recycling of multiple types of waste plastics, including PP, PE, LDPE, ABS, PS, thiab PET.
• o, b, 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. Piv txwv li:

• 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, n, pelletizers, and screening equipment, to provide a one-stop solution for enterprises.

Zhuoyue’s professional R&D team works closely with customers to understand their specific needs and provide tailored solutions that meet their production requirements and budget.

5. Best Practices for Waste Plastic Recycling Granulation with Zhuoyue Extruders

To ensure the best performance and granule quality when using Zhuoyue extruders for waste plastic recycling granulation, the following best practices are recommended:

5.1 Proper Sorting and Cleaning

Effective sorting and cleaning are essential to reduce the wear and tear on the extruder and ensure high-quality granules. Separate different types of plastics to avoid mixing, and remove non-plastic contaminants (xws li hlau, ntawv, and glass) as much as possible. Thoroughly clean the waste plastics to remove oil, grease, and food residues, which can affect the mixing and plasticizing effect.

5.2 Optimal Drying

Ensure that the crushed plastic pieces are properly dried to reduce the moisture content to below 0.5%. For moisture-sensitive plastics such as PET, use high-temperature drying (120-160°C) for a sufficient period to ensure complete moisture removal. This helps to avoid bubbles and defects in the recycled granules.

5.3 Precise Process Parameter Control

Adjust the extruder parameters (such as temperature, screw speed, and extrusion pressure) according to the type of waste plastic. Follow the recommended parameter settings provided by Zhuoyue, and make adjustments based on the actual material properties and granule quality. Avoid excessively high temperatures or shear rates, which can cause plastic degradation.

5.4 Kev Saib Xyuas Tsis tu ncua

Regularly inspect and maintain the extruder to ensure its normal operation. Clean the screws and barrels regularly to remove any accumulated material or contaminants. Check the wear of the screws and barrels, and replace them when necessary. Lubricate the moving parts regularly to reduce friction and extend the service life of the extruder.

5.5 Use of Additives (If Necessary)

For waste plastics with severe degradation or poor performance, consider adding additives such as stabilizers, antioxidants, and plasticizers to improve the quality of the recycled granules. Consult Zhuoyue’s technical team to select the appropriate additives and dosage.

6. Xaus

Waste plastic recycling granulation is a critical technology for realizing resource circulation and environmental protection, offering significant economic, environmental, and social benefits. 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, Ua ke kev ua tau zoo siab, m, energy-saving, Thiab kev txuag nqi. 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, qhov tseeb tswj kub, 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.