How to Improve Wear Resistance of Screw Barrels in High-Filler Applications
Introduction
High-filler compounds, such as calcium carbonate or glass fiber reinforced plastics, significantly increase wear on screw barrels.
1. Why Wear Resistance Matters
Abrasive materials accelerate barrel erosion, leading to:
- Reduced dimensional accuracy
- Output instability
- Frequent downtime
2. Material Selection Solutions
- Nitrided alloy steel
- Bimetallic inner liners
- Tungsten carbide coatings
3. Performance Comparison
| Material Type | Wear Resistance Level | Cost Level |
|---|---|---|
| Nitrided Steel | Medium | Low |
| Bimetallic Barrel | High | Medium |
| Carbide Coating | Very High | High |
Conclusion
Selecting appropriate wear-resistant materials ensures longer service life and reduces maintenance costs in high-filler extrusion systems.