55/110 Conical Vented Twin Screw Barrel

Hardness of nitration: 950-1020HV

Fragility of nitration: Less than grade 1

Roughness of the surface:Ra 0.4um

Linearity of the screw:0.015mm

Chromium-plating layer thickness:0.03-0.08mm

Hardness of double alloys: HRC55-62

Depth of double alloys:>2 mm

The surface hard chromium plating hardness after nitrogenation:>=950HV

Guarantee: Common Nitrided: approx 2 years    Bimetallic : much longer lifetime

Technical standard:

1.Material: 38C rMoALA

2.Hardness of modulator: HB260-290

3.Hardness of nitrification:800-1050HV

4.Depth of nitrification layer: 0.4-0.7mm

Double-alloy technical standard:

Double-alloy level:

1.Level A - containing tungsten of 40%

2.Level B - containing tungsten of 25%

3.Level C - containing tungsten of 9.5%

4.Hardness of alloy: HRC56-65o

Applied scope of plastic: applied for PVC and WPC material, has a high output and stable performance.

1.Components of alloy powder: Ni + Co + Cr + W + Si + Fe + B + C

2.Depth of alloy layer: 1.2 mm-2.0 mm

3.Hardness of alloy: HRC>65°

Two stage type of barrel (material of powder outlet is Cr12MoMV, vacuum quenching)
and screw (powder output is treated by alloy), the using lifespan is long as twice
as common ones.The twin screws and barrel can be equipped in differents