parallel twin screw and barrel for plastic extruder machine

Specifications

1. Diameter of screw: D20-D300mm

2. L/D ratio of screw: 10 - 50

3. Injection amount of screw barrel: 45g - 200g

4.Tempering hardness:HB280-320

5. Nitride hardness:HV850-1000

6.Nitride Layer thickness::0.45-0.7mm

7.Nitride brittleness: less than 2 grade

8.SUrface roughness:Ra 0.4

9.Screw straightness:0.0015mm

10.surface chromium-plating's hardness after nitriding : more than 900HV

11.Chromium-plating thickness:0.025-0.1mm

12.Bimetallic hardness:HRC50-65