Screw barrel for film
Film Screw Barrel
Film screw barrels are essential components in extrusion equipment designed specifically for processing plastic films. These screw barrels play a crucial role in melting, mixing, and extruding plastic resins into thin, continuous films with precise thickness control, excellent surface quality, and uniform properties.
Types of screw :
Gradual, saltation, wave, screen, double screen, distributary、 separating, exhausting, dowel.mixed smelting、double screws、 three screws、 more screws、 granulating ,etc.
material | 38CrMoAlA | straightness | 0.015mm/m |
hardness after quenching and tempering | HB240-280 | inside & outside diametre tolerance | ≤0.02mm |
hardness after nitridation | HV900-1000 | circular run-out | <0.04mm |
depth of nitrided layer | 0.5-0.7mm | screw length tolerance | ≤0.03mm |
brittleness after nitridation: | ≤second level | key &spine tolerance grade: | Grade 7 |
surface roughness | Ra0.4μm |
Technical Information for single screw barrel | |||
Main Base materials | 1.38CrMoAlA (SACM645) | Main Alloy Materials | 1. Ni-based alloy/Deloro alloy |
2. SKD-61 (Special Tool Steel) | 2. Tungsten carbide/Wolfram carbide | ||
3. 42CrMo (Ultrahigh StrengthSteel) | 3. NiCo-based alloy | ||
4. DC53 (Cold WorkDie Steel) | 4. Fe-based alloy | ||
5. W6Mo5Cr4V2 (High-SpeedToolSteel) | 5. Co-based alloy | ||
Processing Technics | 1. Heat treatment | Technical parameters | Nitriding layer depth:0.5-0.8mm |
2. Quenching | Nitrided hardness:900-1000HV | ||
3. Nitriding treatment | Bimetallic layer depth:3 mm | ||
4. Bimetallic alloy welding for screw | Bimetallic hardness:57~69HRC | ||
5. Bimetallic alloy centrifugal casting for barrel | Hard-chrome plating hardness after nitriding:≥950HV | ||
6. Hard-chrome electroplating | Chrome-plating layer depth:0.03-0.09mm | ||
Linearity of screw:0.015mm | Surface roughness:Ra 0.4 | ||
Benefits
Precision and Consistency in Film Thickness
Film screw barrels from Shanghai Hannshine ensure uniform distribution of molten plastic resin, resulting in consistent film thickness and excellent dimensional stability. This enhances product performance and reduces material waste.
Enhanced Wear Resistance and Durability
Crafted from high-grade materials such as nitrided steel and bimetallic alloys, our film screw barrels offer exceptional wear resistance and prolonged service life. This minimizes downtime and maintenance costs, ensuring continuous operation.
Optimized Design for Efficiency
With advanced screw geometry and surface treatments, our screw barrels optimize melt homogeneity, cooling efficiency, and line speed control. This improves production efficiency, reduces energy consumption, and enhances throughput rates.
Customization Options
We provide customization options to meet specific customer needs, including screw diameter, L/D ratio, flight design, and material composition. Our engineering expertise ensures that each film screw barrel is tailored for maximum performance and reliability.
