Granulation Production Line
A plastic pelletizing line is a system that is used to process plastic materials into small, uniform pellets. These pellets are then used as raw materials in the production of plastic products, such as injection molded parts, films, and sheets.
What Is Plastic Pelletizing Line?
A high-performance plastic pelletizing line is an essential plastic recycling system that transforms raw or recycled polymers into uniform recycled plastic pellets. These premium-grade pellets serve as foundational materials for manufacturing durable plastic products including injection molded components, high-quality plastic films, and industrial-grade sheets.
Key Components of a Plastic Pelletizing Line:
Pre-processing Stage: Advanced shredding and grinding equipment prepares materials for optimal melting consistency
Extrusion Technology: State-of-the-art screw extruders with temperature-controlled barrels ensure precise polymer melting
Die Face Cutting System: Specialized pelletizing dies produce consistent pellet geometry (2-5mm diameter typical)
Cooling & Classification: Integrated water circulation systems with centrifugal dryers achieve production-ready moisture levels
Material Versatility:
This plastic pellet production system efficiently processes:
Polyethylene (HDPE/LDPE)
Polypropylene (PP)
Polystyrene (PS)
PVC Compounds
Post-industrial and post-consumer recycled materials
Sustainability Advantages:
Modern plastic pelletizing recycling systems deliver dual environmental/economic benefits:
Reduces plastic waste volume by up to 90% through closed-loop recycling
Lowers carbon footprint compared to virgin plastic production
Increases material value with FDA-compliant reprocessed pellets
Supports circular economy initiatives across packaging, construction, and automotive industries
Technical Customization:
Each industrial pelletizing machine configuration is engineered based on:
Melt flow index (MFI) requirements
Thermal stability characteristics
Throughput capacity (100-5,000 kg/h options)
End-product specifications (optical clarity, tensile strength, etc.)
Workflow
01.
Extruder Mainframe
It’s suitable for PP PET PE film, HDPE LDPE and other plastic recycling.The extruder is paired with quantitative feeder, vacuum exhaust system, multiple constant temperature zones with automatic temperature control and air cooling system. The agglomeration granulator provided by Chenxing has the features of compact structure, simple operation, stable performance and high plasticization quality.
02.
Screen Changer
The screen changer can be used repeatedly. Chenxing automatic hydraulic screen changers can be installed directly on the terminal of the barrel and connected to all our standard granulation heads.Used to remove all contaminants from raw materials such as: PVC, PE, PP, PC, ABS and other recycled materials.
03.
Granulation Head
Pelletizing or die heads units are used in strand pelletizing systems for extrusion of granules.Chenxing pelletizing heads are used to produce thermoplastic granules from recycled plastic flakes, both virgin and recycled granules.
04.
Water Cutting Unit
Specially used for recycling polyethylene, polypropylene and other types of polymers. Most basic pelletizing line manufacturers can only pelletize PP, EPS by pulling and cutting them. Chenxing has overcome this technology perfectly and made it possible to apply water cutters to PP and EPS.
05.
Dewatering Unit
The moisture in the final granules is reduced to less than 2% through a vertical centrifugal dryer.The material is dried by transferring the particles to a centrifugal drying chamber via a built-in screw conveyor, which uses centrifugal force to shake the material dry and lift it to the outlet.
06.
Sieving Unit
The final granules material are screened out by a vibratory sifter for uniform granule size. The larger size plastic granules will be collected additionally.
07.
Blower & Silo Unit
The plastic granules are blown into the silo through the pipe under the action of the blower.
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Different Types Of The Pelletizing Line
- Water-ring pelletizing: This type of pelletizing system uses a water-ring cutter to cut the extruded material into pellets. The water-ring cutter uses a ring of water to cool the extruded material and cut it into pellets. This type of pelletizing line is commonly used for processing thermoplastic materials.
- Strand pelletizing: In a strand pelletizing system, the extruded material is cut into pellets using a strand cutter. The strand cutter cuts the extruded material into strands, which are then cooled and cut into pellets. This type of pelletizing line is commonly used for processing thermoset materials.
- Underwater pelletizing: In an underwater pelletizing system, the extruded material is cut into pellets using an underwater cutter. The underwater cutter cuts the extruded material into pellets while it is submerged in water. This type of pelletizing line is commonly used for processing thermoset materials.
- Air-cooling pelletizing: In an air-cooling pelletizing system, the extruded material is cooled using a stream of air. The cooled material is then cut into pellets using a cutter. This type of pelletizing line is commonly used for processing thermoplastic materials.
- Cryogenic pelletizing: In a cryogenic pelletizing system, the extruded material is cooled using a cryogenic fluid, such as liquid nitrogen. The cooled material is then cut into pellets using a cutter. This type of pelletizing line is commonly used for processing thermoset materials.
