pvc screw
1.Shaft material: 40CrNiMoA
2.treatment:nitride(0.5-0.7mm)
3.surface hardness:HV950
4.chromate plating
pvc screw
Screw and barrel range
1.Injection molding machine | Clamping force:25kn-3,200kn |
2.Single screw extruder | Screw diameter:15mm-300mm |
LD ratio:15-46 | |
3.Conical twin screw extruder | Screw diameter:35mm-92mm |
4.Counter rotating parallel twin screw | Screw diameter:500mm-180mm |
L/D ration:16-35 | |
5.Co-rotating twin screw extruder | Screw diameter:25mm-120mm |
Screw technical specification:
Steel Material | DIN 41CrA1Mo7 / AST M4140 |
Heat Treatment | Tempered and nitride, nitride depth: 0.5 mm – 0.7mm |
Surface hardness: | HV900 – HV1, 000 |
Chromate plating: | Thickness 0.05 mm – 0.10 mm, hardness HV950 |
Special treatment: | Carbide coating (screw flight) and bimetallic barrel |
Screw straight tolerance | 0.015 mm/m |
Surface roughness | Ra 0.4μm |
