Parallel twin screw barrel
Diameter: φ45-φ200 (according to the demands of customers)
L/D ratio:16-35
The compression ratio of screws can be designed according to different products and mixtures.
Technical Parameter:
Hardness After Hardening & Tempering:HB280-320
Nitrided hardness: HV850-1000
Nitrided layer depth:0.50-0.80mm
Nitrided brittleness: ≤ Grade Ⅱ
Surface roughness: Ra 0.4μm
Linearity of screw: 0.015mm
Bimetallic layer depth: ≥2mm
Bimetallic hardness: HRC60-72
Hard-chrome plating hardness after nitriding: ≥900HV
Chrome-plating layer depth: 0.025-0.10mm
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