Twin Screw Extruder Screw Design

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°

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),etc

General Terms

Means of transport: Ocean,Air,Express

Production time: About 25 days after we receive the deposit and lead time will different according to the order quantity!

Our products advantages

1)High productivity        2)Wonderful plasticizing

3) low energy consumption  4)Wearable and Durable

5)Fast and On time delivery  6)Best customer service!