A twin screw extruder is one of the most advanced machines in modern plastics processing. It is widely used in compounding, pelletizing, and recycling of engineering plastics, filled materials, and blends. At HONGQI, we specialize in twin screw plastic pelletizing extrusion machines that are designed for high efficiency, consistent pellet quality, and stable operation. Understanding how this machine works will help manufacturers see why it is essential for producing high-performance plastic materials.
A twin screw extruder operates with two parallel screws rotating inside a barrel. These screws can rotate either in the same direction (co-rotating) or opposite directions (counter-rotating). As raw materials are fed into the hopper, the screws transport, compress, and shear the materials forward, ensuring thorough mixing and plasticization.
The continuous interaction between the two screws provides:
Efficient melting of polymers
Excellent dispersion of fillers, pigments, or glass fibers
Uniform mixing for high-quality pelletizing
This makes twin screw extruders superior for complex plastic formulations compared to single screw designs.
Feeding System
Plastic resins, additives, or recycled flakes are consistently fed into the extruder. The controlled feeding ensures accurate dosing and stable production.
Screws and Barrel
The heart of the machine, designed with modular Screw Elements. The intermeshing design enables intensive mixing, allowing materials like PA, PC, or ABS to be processed even with high glass fiber reinforcement.
Heating and Cooling Zones
The barrel has multiple temperature zones. Each zone is precisely controlled to ensure polymers melt evenly without degradation.
Screen Changer and Die
At HONGQI, we manufacture our own screen changers, which filter impurities and ensure clean, uniform melt flow before pelletizing.
Pelletizing System
After extrusion, the material is cut into pellets. Our water cooling pelletizing system provides smooth pellets, stable dimensions, and excellent cooling efficiency.
Compared with single screw extruders, twin screw machines offer distinct benefits:
Superior Mixing Performance
The co-rotating design ensures efficient shearing and dispersion, making it ideal for glass fiber reinforced plastics.
High Output Capacity
Twin screws handle large material loads at high speeds, increasing productivity without sacrificing quality.
Wide Processing Range
Suitable for polyolefins, engineering plastics, biodegradable resins, and recycled materials.
Stable Pellet Quality
Uniform dispersion and water cooling pelletizing ensure consistent pellet size and mechanical properties.
Customizable Design
Modular screw elements and precise CNC machining allow configuration for specific materials and applications.
One of the key strengths of our HONGQI twin screw extruder is in recycling PA or PC materials with 35–40% glass fiber content. Traditional single screw machines may struggle with high wear and poor mixing, but twin screw extruders are capable of:
Withstanding the abrasion of glass fiber
Ensuring proper dispersion of reinforcement
Producing high-strength pellets for automotive, electronics, and industrial applications
This makes our equipment an excellent solution for sustainable plastic recycling and high-performance material production.
20+ years of professional manufacturing experience
Advanced CNC machining for precision screw elements and key parts
Self-developed screen changers for uninterrupted production
High-speed operation with energy-efficient motors and inverters
Proven water cooling pelletizing system for superior pellet quality
Our twin screw extruders are built to meet the demands of modern plastics manufacturing, combining reliability, high throughput, and material flexibility.
✅ Learn more about our Twin Screw Plastic Pelletizing Extrusion Machine at HONGQI and discover how we can provide customized extrusion solutions for your production line.
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