Parallel Twin Screw Barrel Bimetallic Screw Barrel

Technical Paremeters for parallel twin screw and barrel

Steel Material 38GrMoAlA,42GrMo

Hardness after hardening &tempering HB:280-320
Hardness &Tempering time 72 hours

Nitrided hardness HV:850-1000

Nitrided time 120hours

Depth of nitriding case 0.50-0.80mm

Nitrided Brittleness less than grade 2

Surface Roughness Ra:0.4

surface hardness of chromium- plating after Nitriding >HV900

Depth of chromium -plating 0.025-0.10mm

Alloy Hardness HRC:50-65

Alloy Depth 0.8-2.0mm

Application:

PE, PP, ABS, rubber, various high glass fiber, mineral fiber and PPA,PPS, PA6T, LCP,VO fire protection, ferrous power, magnetic powder, etc.

For recylced plastic material, PVC + 30% CaCo3, etc

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