Screw and barrel for Extruder High quality alloy steel
Screw and barrel for Extruder
Lenght/Diameter Ratio:L/D=18~25
The compression ratio of the screw can be designed according to different raw materials and products. Use for PVC,PP,PE Material: Alloy-steel of high-quality 1)38CrMoAlA(JIS SACM645) 2)42CrMo(JIS SCM440)
1)Heat-treatment
2)Nitriding treatment
3)Hard-chrome electroplating
4)High-frequency quenching
5)Bimetallic alloy spray finishing
6)Vacuum quenching
Technical parameter1)Nitriding depth:0.5-0.8MM2)Nitriding hardness:900-1000HV3)Nitriding brittleness:Less than grade 14)Surface roughness:Ra 0.45)Linearity of the screw:0.015 MM6)Hardness of the chrome plating after nitriding:More than 950HV7)Chrome plating thickness:0.025-0.085MM
Parallel Twin Screw Barrel for Extruder
