Tungsten Carbide Sprayed Screw Segments for WPC Compounding
These tungsten carbide sprayed screw segments are high-performance
components for co-rotating parallel twin-screw extruders, specially
engineered for WPC (Wood-Plastic Composite) compounding and extrusion. Crafted from a robust 38CrMoAlA/SACM645 alloy steel base, their
surfaces are precision-coated with a dense tungsten carbide layer,
delivering exceptional wear resistance that far outperforms
standard nitrided or bimetallic segments—critical for processing
highly abrasive WPC materials containing wood fiber, calcium
carbonate, and other fillers.
The optimized geometry of these segments ensures efficient material
conveying, uniform mixing of wood powder and polymer resin, and
stable plasticizing, even under the high-torque, high-load
conditions of WPC production. This directly translates to reduced
downtime, extended component life, and consistent quality of WPC
profiles, decking, and furniture components.
Key Specifications
| Parameter | Detail |
|---|
| Product Type | Tungsten Carbide Sprayed Screw Segments |
| Base Material | 38CrMoAlA / SACM645 Alloy Steel |
| Surface Treatment | Tungsten Carbide Thermal Spraying |
| Tungsten Carbide Hardness | HRC 65–72 |
| Coating Depth | 0.3–0.8 mm |
| Applicable Equipment | Co-Rotating Parallel Twin-Screw Extruders (Φ35–Φ150mm) |
| Applicable Materials | WPC (Wood-Plastic Composites), PE/PP Wood Powder Composites,
High-Fill WPC Compounds |
| Customization | Customizable to match extruder model, screw diameter, and element
geometry (conveying blocks, kneading blocks) |
Frequently Asked Questions (FAQ)
Q: Why is tungsten carbide spraying ideal for WPC compounding?
A: WPC materials contain wood fiber and mineral fillers that are
highly abrasive. Tungsten carbide’s extreme hardness (HRC 65–72)
provides 2–3 times the wear resistance of standard segments,
significantly extending service life and reducing replacement
frequency.
Q: Can these segments handle high wood powder content in WPC?
A: Yes. The dense tungsten carbide coating resists abrasion from
wood fibers, while the optimized segment geometry ensures uniform
mixing and stable extrusion even with wood powder content as high
as 60–70%.
Q: Are these segments compatible with my existing co-rotating
extruder?
A: Yes. We provide full customization based on your extruder model,
screw diameter, and specific element design to ensure perfect
compatibility and optimal performance for your WPC production line.
By combining a high-strength alloy base with advanced tungsten
carbide spraying technology, these screw segments solve the core
difficulty points of rapid wear, inconsistent mixing, and frequent
component replacement in WPC compounding. They are the preferred
choice for manufacturers of WPC decking, profiles, and furniture,
delivering reliable performance and cost efficiency in
high-abrasion production environments.
