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Parallel twin screw barrel
Diameter: 45-200 according to customers demands)
L/D ratio:16-35
The compression ratio of screw can be designed according to different products and mixtures.
Technical Parameter:
Hardness After Hardening & Tempering:HB280-320
Nitrided hardness: 950-1100HV
Nitrided layer depth:0.50-0.80mm
Nitrided brittleness:  level 2
Surface roughness: Ra 0.4m
Linearity of screw: 0.015mm/m
Bimetallic layer depth: 3mm
Bimetallic hardness: HRC60-72
Hard-chrome plating hardness after nitriding: 950HV
Chrome-plating layer depth: 0.025~0.10mm
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