Injection Molding Screw Barrel

Base Material

1)38CrMoAlA(JIS SACM645);2)Cr12MOV(JIS SKD-11);
3)4Cr5MoSiV1(JIS    SKD-61);4)42CrMo(AISI 4140)

Bimetallic Alloy Materials

1)Fe-based   alloy  2)Ni-based alloy/Deloro alloy 
 3)Co-based alloy  4)NiCo-based alloy 
 5)Tungsten carbide/Wolfram carbide

Double-alloy level

Level A - containing    Tungsten of 40%
Level B - containing tungsten of 25%
Level C - containing tungsten of 9.5%

Surface Treatment

Heat Treatment
High Frequency Treatment
Nitriding treatment(120 Hours):
Depth of Nitrided Layer: 0.5-0.8 mm
Hardness of Nitrided  Layer: 900-1020Hv (HRC56°-65°)
Hard Chrome Plating treatment:
Thickness of Hard Chrome Plating Layer: 0.05-0.10mm
 Hardness   of Hard Chrome Plating Layer: ≥950HV
 Nickel alloy plating.treatment:
 Bimetallic Barrel/Cylinder: Centrifugal Casting (Inlay Alloy)
 Bimetallic    Screw: Plasma Alloy Coating Spraying
 Depth of Bimetallic Layer: >2mm
 Hardness of Bimetallic Layer: HRC55°-72°
 Spraying corrosion wear-resisting dual metal    layers

Basic information

Roughness of the   surface:Ra0.4um
Linearity of the screw: ≤0.015mm
Linear axis limit: ≤0.02mm
Hardness after Hardening & Tempering: HB240-280
Fragility of Nitration:≤Two class

Material Application

1)General Plastics
2)ABS,PA,PC,PE,PET,PP,PS,EVA,PU,PVC,U-PVC,etc
3)PA + GF(Glass Fiber)
4)Flame-resistant Reinforced Plastics
5)Modified Engineering Plastics
6)All kinds of Mixed Recycled Material(in Scrap or Granule), PVC + 30% CaCo3,    etc