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HomeTwin Screw Parallel Counter-rotating Extruder
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TwinScrew’s counter-rotating twin screw extruder is engineered to deliver consistent, high-quality output in PVC profile, pipe, and pelletizing applications. Designed with a parallel twin-screw configuration, this extruder delivers superior melt homogeneity while reducing shear stress, making it ideal for heat-sensitive materials such as rigid PVC.
With over 30 years of manufacturing experience, TwinScrew integrates world-class components and modular engineering into every machine—ensuring high performance, long lifespan, and easy maintenance.
Key Features
- High Specific Output – Optimized screw design maximizes throughput with minimal energy consumption.
- Superior Melt Quality – Uniform plasticizing through intermeshing screw geometry.
- Low Shear Processing – Ideal for thermal-sensitive materials like uPVC and WPC.
- Stable Pressure Control – Supports precise dimensional stability for profiles and pipes.
- Long Service Life – Bimetallic barrels and wear-resistant screws ensure durability.
- Modular Design – Easy integration with downstream equipment such as calibration tables, pelletizers, and haul-offs.
Typical Applications
- PVC Window & Door Profiles
- PVC Conduits & Plumbing Pipes
- WPC Decorative Panels
- PVC Pelletizing (Rigid & Flexible Formulations)
Counter-Rotating vs Co-Rotating Twin Screw Extruders
While both extruder types offer twin-screw performance, the choice depends heavily on material behavior and processing goals:
| Feature | Counter-Rotating | Co-Rotating |
|---|---|---|
| Screw Direction | Opposite | Same |
| Ideal for | PVC, Heat-sensitive materials | Compounding, Mixing-intensive tasks |
| Shear Rate | Lower (gentler on materials) | Higher (more energy input) |
| Output Stability | Very Stable | High, but may require tighter control |
| Application Examples | PVC profiles, WPC panels, uPVC pipes | Filler compounding, Masterbatch |
Counter-rotating extruders are especially effective for PVC processing due to their low-shear, high-pressure features. This ensures smooth extrusion without degrading the material, particularly when producing rigid PVC profiles or foam core pipes.