Modified Material Extruder Screw Barrel for Plastic Compounding
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 difficulty 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 difficulty 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).
