screw&barrel for rubber machine

crew Barrel specification:


1.Pinned screw&barrel of rubber machine:

Diameter:φ60-φ250

Ratio of Length to Diameter :1218


2.Cold feed screw&barrel of rubber machine:

Diameter:φ30-φ300

Ratio of Length to Diameter :820

 

3.Hot feed screw&barrel of rubber machine:

Diameter:φ30-φ250

Ratio of Length to Diameter :46


Product specification for screw&barrel of rubber machine:


Technology index:


Surface roughness: Ra0.4um/m

Barrel linearity: 0.015mm/m

Depth of Nitrated Layer: 0.5-0.8mm

Heat treatment: Nitriding 96 hours

Hardness of nitration: 900-1020Hv
Fragility of nitration: Less than grade 1
Hardness of Bimetallic Layer: HRC55°-72°
Thickness of Cr-coating Layer: 0.03-0.08mm
Depth of Bimetallic Layer: >2mm