Plastic granulator screw and barrel
This ion nitrided cast film extruder screw barrel is engineered for high-precision cast film production equipment—specializing in processing PET, TPU, PBT and other high-demand plastic films (e.g., food packaging films, electronic protective films). It’s designed to solve the pain points of uneven film thickness and poor surface finish in high-precision casting, ensuring consistent ultra-thin film quality (0.01mm-0.1mm) during continuous production.
Adopting 38CrMoAlA/SACM645 alloy steel and advanced ion nitriding technology, this screw barrel achieves higher hardness uniformity and surface smoothness than conventional gas nitrided screws. It has been verified by precision film manufacturers: its plasticizing effect ensures 95%+ film thickness uniformity, with no visible defects on the film surface.
Key Specifications
| Parameter |
Detail |
| Applicable Equipment |
High-Precision PET/TPU/PBT Cast Film Extrusion Machine |
| Screw Material |
38CrMoAlA, SACM645 Alloy Steel |
| Processing Technology |
72H Quenching (HB260-290), 168H Ion Nitriding |
| Nitrided Hardness |
HRC62°-68° (Uniform Hardness Distribution) |
| Nitriding Depth |
0.4mm-0.7mm |
| Screw Diameter |
Φ30mm-Φ200mm |
| L/D Ratio |
20:1-35:1 (Optimized for High Precision Plasticizing) |
| Straightness |
0.01mm/1000mm (High Precision Requirement) |
| Applicable Materials |
PET, TPU, PBT, High-Precision Plastic Resins |
| Film Thickness Adaptation |
0.01mm-0.1mm (Ultra-Thin High-Precision Films) |
Frequently Asked Questions (FAQ)
Q: What’s the advantage of ion nitriding over conventional gas nitriding for cast films?
A: Ion nitriding provides more uniform surface hardness and smoother texture, which reduces material friction and adhesion during high-precision plasticizing—effectively avoiding film surface scratches and thickness fluctuations.
Q: Can it handle ultra-thin high-precision films (e.g., 0.01mm PET film)?
A: Yes—its optimized L/D ratio (20:1-35:1) and precise plasticizing performance ensure stable material flow, maintaining 95%+ thickness uniformity for 0.01mm ultra-thin films.
Q: What’s the service life when producing high-precision films continuously?
A: Thanks to ion nitriding’s wear resistance, it maintains stable performance for 18,000+ working hours in continuous high-precision casting, reducing screw replacement frequency by 30% compared to standard screws.
With 72-hour quenching and 168-hour ion nitriding, this screw barrel achieves strict straightness (0.01mm/1000mm) and uniform hardness—key for high-precision cast film production. It solves the core pain points of poor film uniformity and surface defects in high-end casting scenarios, becoming the preferred component for precision film manufacturers (e.g., food packaging, electronic protection film suppliers).
