Screw cylinders for PP film blowing machine

• Specification

Screw diameter: Ø15-300MM       L/D:15-55
Barrel diameter:  Ø25-500MM        Length:300-800MM

• Material

38CrMoAlA(JIS SACM645)
42CrMo(AISI 4140)

Cr12MOV(JIS SKD-11) 
4Cr5MoSiV1(JIS SKD-61)

9Cr18MoV,etc

• Parameter

Depth of Nitrated Layer: 0.5-0.8mm
Heat treatment: Nitriding 96 hours
Hardness of nitration: 900-1020Hv
Fragility of nitration: Less than grade 1
Surface roughness: Ra 0.4um

• Screw species:

High-efficient serial, gradual change serial, sudden change serial, wave serial, barrier serial, twin barrel serial, conical serial, spider serial, separate serial, venting serial, pin serial, mixing serial, double head, three head, multi-head , palletizing,etc.

Special type suit for special appliance.If any interest,contact us for detailed.