Parallel twin screw  barrel
We are a professional manufacturer of screw and barrel that has been in this line for 10 years, we can supply and design all kinds of screw&barrel according to your requirments.

The parallel twin screw and barrel for extruder in many specifications.
The parallel twin screw's Abrasion resistant and corrosion resistant.

1. The parallel twin screw's material:
1): 38CrMoALA (JIS SACM645)
This kind of material is applicable to double alloy and common molding screw
2): 9Gr18MoV
3): 42CrMo

2. Technics:
1): Heat-treatment
2): Nitriding-treatment
3): Spray bimetallic-alloy coating.

3. Technical parameter:
1): Depth of Nitration Layer: 0.5-0.8mm
2): Hardness of Nitration: 900-1000HV
3): Fragility of Nitration: Less than grade 1
4): Roughness of the surface: Ra0.4
5): Straightness of the screw: 0.015mm
6): Surface hardness of Nitrated Cr coating Layer: >=950Hv
7): The thickness of Chrome-plating layer: 0.025-0.085mm
8): Depth of alloy Layer: >2m.