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