Screw Barrels for Yizhumi Injection Molding Machine

Screw Barrels for Yizhumi Injection Molding Machine Diameter: φ15-φ500 L/D ratio:15-55 Technical Parameter: Hardness After Hardening & Tempering:HB280-320 Nitrided hardness: 950-1100HV Nitrided layer depth:0.50-0.80mm Nitrided brittleness: Less than 2 level Surface roughness: Ra 0.4μm 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 Product classification: According to different ingredents and products the screw can be chosen: general type, pin type, barrier type, separation type, and gas-exhausting/vented type, etc.