Nitrided Blown Film Extruder Screw Barrel with 38CrMoAlA
This nitrided blown film extruder screw barrel is dedicated to various blown film & cast film equipment—including PE, PO, PP, PPO blown film machines, as well as PVC/TPU/PET/PBT film production lines. It has been verified by numerous customers: even when processing materials mixed with waste/recycled plastics or calcium powder, it maintains excellent plasticizing effect, with higher output than standard screw barrels on the market. We also offer high-speed blown film screw barrel options for efficient continuous production.
The JCD Series blown film screw barrel adopts high-quality materials (38CrMoAlA alloy steel, SACM645 chrome-molybdenum steel, or bimetallic coating) and precision processing. Its stable plasticizing performance and wear resistance make it suitable for both general and high-demand blown film scenarios.
Key Specifications
| Parameter |
Detail |
| Applicable Equipment |
PE/PO/PP Blown Film Machine, PVC/TPU/PET Cast Film Equipment |
| Screw Material |
38CrMoAlA, SACM645, Bimetallic Coating (Optional) |
| Screw Diameter |
Φ30mm-Φ200mm |
| L/D Ratio |
15:1-35:1 |
| Overall Hardness |
HRC58°-68° (Nitrided Hardness: HRC62°-65°) |
| Nitriding Depth |
0.4mm-0.7mm |
| Straightness |
0.015mm/1000mm |
| Processing Technology |
72H Quenching (HB260-290), 168H Vacuum Gas Nitriding |
| Applicable Materials |
PE, PO, PP, PVC, TPU, PBT, PET (Including Waste/Recycled Plastics + Calcium Powder) |
Frequently Asked Questions (FAQ)
Q: Can it handle materials mixed with waste/recycled plastics or calcium powder?
A: Yes—its optimized screw structure ensures excellent plasticizing effect even for materials containing 20%+ waste/recycled plastics or calcium powder, avoiding uneven melting and film quality defects.
Q: What’s the advantage of the high-speed blown film option?
A: The high-speed version is designed with a special thread structure, which improves extrusion efficiency by 15% while maintaining stable film thickness, suitable for large-scale continuous production lines.
Q: How long is its service life when processing abrasive materials (e.g., calcium powder)?
A: Thanks to 38CrMoAlA material + 168H nitriding treatment, its wear resistance is 20% higher than standard screws, with a service life of 12,000+ working hours for calcium powder-containing materials.
With 72-hour quenching and 168-hour vacuum gas nitriding processes, the JCD Series blown film screw barrel achieves precise straightness (0.015mm/1000mm) and stable hardness. It solves the difficulty points of poor plasticization, low output and short service life when processing mixed materials, becoming the preferred component for blown film manufacturers pursuing cost-effectiveness and efficiency.
