Overview of Twin Screw Extrusion Plastic Pelletizer Machine

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Equipment Nature: A high-efficiency professional industrial equipment specially designed for processing various plastic waste materials (including PP, PE, LDPE, HDPE, ABS, PS, etc.) into uniform and high-quality plastic pellets through processes of crushing, twin-screw extrusion melting, filtering, shaping and cutting; adopts co-rotating twin-screw design, featuring strong material adaptability and mixing capacity.
Applicable Materials: Mixed plastic waste (PP/PE/LDPE/HDPE blends), contaminated plastic film, plastic pipe scraps, plastic bottle flakes, injection molding leftovers, blow molding waste, plastic sheet scraps, ABS/PS plastic waste, etc.
Core Processes: Integration of the entire process from plastic crushing, feeding, twin-screw extrusion melting, filtering & impurity removing, shaping, cooling to pelletizing; the twin-screw extrusion module is the core part, realizing efficient conveying, mixing and melting of materials.
Core Value: Breaks through the limitation of single-screw machines that are only suitable for single-type plastics; realizes efficient recycling of mixed and high-impurity plastic waste, solving the problem of difficult recycling of complex plastic waste; the produced pellets have uniform quality and stable performance, and can be directly reused for producing plastic products; helps enterprises reduce raw material procurement costs by 35-60% and improve resource utilization efficiency.
Applicable Enterprises: Large-scale plastic recycling centers, comprehensive plastic product manufacturers, waste treatment plants, plastic packaging material processing enterprises, chemical plastic processing enterprises.

Key Types of Twin Screw Extrusion Plastic Pelletizer Machine

Core Product Portfolio & Application Scenarios

Twin Screw Extrusion Plastic Pelletizing Machine

The Twin Screw Extrusion Plastic Pelletizing Machine is designed for high-performance compounding, mixing, and granulation of PP, PE, ABS, PET, and filled or reinforced plastics (e.g., with CaCO₃, talc, or glass fiber). Featuring co-rotating intermeshing screws, precise temperature control, and modular barrel design, it ensures excellent dispersion, degassing, and melt homogeneity. Integrated with underwater or strand pelletizing, the system delivers uniform, high-quality pellets—ideal for masterbatch, engineering plastics, and recycled compound production.

Underwater Pelletizer Machine for Thermoplastics Elastomer

The underwater pelletizer machine for thermoplastic elastomers (TPE/TPR/TPV) is a high-precision system that cuts molten polymer strands directly underwater into uniform, spherical pellets. Designed for heat-sensitive and sticky materials, it ensures excellent surface finish, minimal dust, and consistent particle size. Integrated with a melt pump and die plate, the system offers stable pressure and high throughput—ideal for producing premium-grade TPE pellets used in automotive, medical, and consumer goods applications.

Complete Process Flow & Equipment Configuration

Disassembly of the entire production process and detailed description of each functional module

HDPE Pelletizing Line Sub-module Specifications

Sub-module Name	Composition	Function
HDPE Crushing Module	Special HDPE crusher (high-toughness blade), discharge conveyor, metal detector	Crush large pieces of HDPE materials into small fragments (3-5cm) to facilitate subsequent melting; detect and remove metal impurities in HDPE materials to protect the follow-up equipment.
HDPE Cleaning & Dewatering Module	Bubble cleaning tank, high-pressure spray device, centrifugal dehydrator	Remove soil, oil stains, ink and other pollutants on the surface of crushed HDPE fragments; dehydrate the cleaned HDPE fragments to moisture content ≤1% to avoid bubbles in the melting process.
Feeding Module	Speed-adjustable spiral feeder, hopper, level sensor	Realize uniform and continuous feeding of dehydrated HDPE fragments; adjust feeding speed according to the melting state of the extruder; avoid material accumulation or insufficient feeding.
Melting & Extrusion Module	Screw extruder (single/double screw optional), multi-zone heating system, temperature control device	Heat and melt the HDPE fragments uniformly; adjust the heating temperature according to the type of HDPE material (HDPE film: 180-230℃, HDPE pipe/bottle flakes: 190-240℃); extrude the molten HDPE into a continuous strip through the die head.
Filtering & Impurity Removing Module	Coarse filter, fine filter, magnetic separator, backwashing device	Deeply remove residual impurities in the molten HDPE; the magnetic separator specifically removes metal impurities; the backwashing device can clean the filter screen online without stopping the machine, ensuring continuous production.
Shaping & Cooling Module	Shaping die, water cooling tank, air cooling device, conveyor belt	Shape the extruded HDPE strip into a fixed diameter; cool the HDPE strip quickly through water cooling and air cooling to ensure its hardness and shape stability.
Pelletizing Module	High-speed pelletizing cutter, cutter gap adjustment device, particle separator	Cut the cooled HDPE strip into uniform pellets; adjust the cutter gap to control the pellet size (2-6mm); separate the HDPE pellets from the cutting debris.
Drying & Screening Module	Hot air dryer, vibrating screen, cyclone separator	Dry the HDPE pellets to remove surface moisture (moisture content ≤0.3%); screen out unqualified HDPE pellets (too large/too small); separate the pellets from the residual dust.
Control & Electrical Module	PLC control cabinet, touch screen, various sensors (temperature/pressure/current/level)	Realize automatic control of the entire HDPE pelletizing production line; monitor key parameters in real time; alarm and shut down automatically when abnormal conditions occur; record production data for traceability.

Technical Parameters

Quantitative presentation of key technical indicators of the equipment

Twin-Screw Extrusion Pelletizing Line Technical Indicators

Technical Indicator	Specific Content	Description
Processing Capacity	100-2000kg/h	Varies by model (standard type: 300-1500kg/h; enhanced high-impurity type: 200-1200kg/h; engineering plastic special type: 100-800kg/h); can be customized according to project needs.
Applicable Materials	PP, PE, LDPE, HDPE, ABS, PS, PC, PA and other plastic waste, their blends, and plastic materials with impurity content ≤15%	Different models are matched with different plastic materials; the enhanced type is suitable for high-impurity materials, and the special type is suitable for engineering plastics.
Pellet Diameter	2-6mm	Customizable according to downstream processing requirements; size error ≤±0.1mm; pellet shape is regular cylindrical.
Pellet Moisture Content	≤0.3%	Ensure the pellets can be directly stored and reused for production without secondary drying.
Screw Diameter	40-180mm	Corresponds to the processing capacity; the larger the diameter, the higher the processing efficiency; the screw is made of high-wear-resistant alloy steel.
Heating Temperature	150-300℃	Multi-zone adjustable (5-8 zones); precise control according to plastic material type (common plastics: 150-240℃; engineering plastics: 220-300℃); temperature error ≤±2℃.
Power Consumption	30-150kW	Varies by processing capacity and model; energy consumption per unit output is 15-20% lower than that of single-screw pelletizing machines.
Overall Dimensions	Customized	Typical size range: 8m×2.5m×3.5m - 20m×4m×5m; can be optimized according to the workshop space and process layout.
Installation Requirement	Indoor workshop, flat concrete foundation, 380V three-phase voltage, water supply and drainage system, ventilation system	Voltage can be customized according to the requirements of different countries/regions; the integrated model needs to be equipped with a sewage treatment device.
Certifications	CE, ISO 9001, SGS	Complies with mainstream global market access standards, ensuring cross-border sales and use.

Value Advantages for Customers

High Production Efficiency & Energy Saving

Strong Adaptability

Stable & High-Purity Products

Reliable Quality & Stable Operation

Comprehensive After-Sales Support

Frequently Asked Questions

Can the machine process mixed plastic materials?

Yes. Twin-screw plastic pelletizing machine is specially designed for mixed plastic materials; it can uniformly mix and melt different types of plastics. For materials with large differences in properties, a pre-mixing module can be added to ensure pellet quality.

What is the daily maintenance requirement?

Daily maintenance mainly includes: 1) Clean the feeding hopper and filter screen regularly to avoid impurity accumulation; 2) Check the wear of the screw and cutter, and replace them in time if there is excessive wear; 3) Lubricate the transmission parts (bearing, gearbox) regularly; 4) Check the heating system and temperature sensor to ensure accurate temperature control.

Is it necessary to dry the plastic materials before feeding?

Yes. It is recommended to dry the plastic materials (especially recycled plastic flakes) to a moisture content of ≤1% before feeding. Excessive moisture will cause bubbles in the pellets, affecting product quality. We can configure a pre-drying module according to customer needs.

What is the delivery time and payment terms?

The delivery time for standard models is 20-30 days; customized models take 35-45 days. We support flexible payment terms (T/T, L/C, DP) and accept small-batch trial orders. For bulk orders, we provide preferential pricing and phased delivery services.

Do you provide sample testing services?

Yes. Customers can send their plastic material samples to us, and we will use our pelletizing machine to process them into finished pellets and send the samples back for inspection. We also provide test reports (pellet size, moisture content, purity) to help customers confirm the equipment’s performance. The courier cost is borne by the customer.