PVC Extrusion Woes? Fix Product Deformation & Shark Skin for Perfect Results!

High-quality PVC granules are the foundation of durable plastic products, but extrusion issues like product deformation and shark skin phenomenon can disrupt production.  As a trusted PVC granule manufacturer, we break down the causes of these problems and share practical solutions to optimize your PVC extrusion process and ensure consistent output.

1.  Product Deformation in PVC Extrusion: Causes & Fixes

Root Causes:

Uneven melt temperature: Inconsistent heating leads to irregular cooling and shrinkage.

Poor cooling efficiency: Improper cooling practices or tank setup cause warping. 

Solutions:

Mold & Process Adjustments:

Calibrate screw temperature zones for uniform heating.

Optimize cooling practices by ensuring proper cooling tank configuration (e.g., adjusting water flow or temperature gradients).

Speed Synchronization:

Align extrusion speed with traction speed to reduce post-cooling stress.

2.  Tackling the Shark Skin Phenomenon

Why It Happens:

Excessive shear rates at the die: Friction disrupts melt flow, creating surface roughness.

Low melt temperature: Hinders smooth material discharge from the die.

How to Resolve It:

Process & Material Optimization:

Increase melt temperature to improve flow and reduce shear stress.

Use high-quality PVC granules with optimized melt stability to prevent fractures.

Die Adjustments:

Modify die geometry (e.g., smoother transitions) for uniform discharge.

3.  Why Partner with Small Boss?

As a leading PVC granule manufacturer, we provide:

Premium PVC granules: Engineered for smooth extrusion, minimizing shark skin and deformation risks.

Technical expertise: Guidance on process parameters optimization, including temperature and speed calibration.

Consistent material quality: Uniform particle size and composition for reliable melt flow.

FAQ: PVC Extrusion Troubleshooting

Q: How does cooling efficiency affect PVC product quality?

A: Proper cooling prevents warping by ensuring even shrinkage.  Adjust water flow and temperature gradients in your cooling tank for balanced results.

Q: Can shark skin be fixed without raising melt temperature?

A: Yes!  Optimizing die geometry and using high-grade PVC granules with superior flow properties can mitigate this issue.

Conclusion

Addressing PVC extrusion challenges like deformation and shark skin requires precise melt temperature control, optimized cooling practices, and high-quality raw materials.  By partnering with a reliable PVC granule manufacturer, you gain access to materials and expertise that streamline production and enhance product quality.

Upgrade your extrusion process today!  Contact us for high-quality PVC granules and tailored technical support.