degass or gas vented screw and barrel for pelletizer and recycling machine
Size: screw diameter:Φ20-Φ500mm
Maximum screw length:10000mm
Barrel inner bore diameter:Φ500mm
Material: 38CrMoAlA
high quality alloy steel
Technology: nitriding treatment,
alloy coating spraying,
heating treatment,
screw fully hardening,
Depth of nitrition layer: 0.5-0.8mm
Nitriding treatment, surface hardness: HV≥900-1000
Fragility of nitrition: less than grade 1
Surface roughness: Ra 0.4um
Streightness of screw: 0.015mm
Surface of hardness of nitrated Cr coating layer: ≥950HV
Hardness of Cr coating layer: HRC55-62
Thickness of alloy plating: 0.03-0.08mm
Depth of alloy layer:2mm
Used for granulation,PP, PE, PA, PC, ABS,AS etc
We can manufacture various kinds of screw barrels according to the customers requirement
degassing screw and barrel for pelletizer or recycling machine