Two-fighted Screw Elements

Name: Two-fighted Screw Elements
Brand: NANJING LESUN SCREW CO.,LTD

Two-fighted conveying screw elements, under the conditions of Do/Di ranging from 1.55 to 1.8, achieve the optimal balance between free volume and high torque bearing capacity, thus dominating in the co-rotating twin screw compounding extruders. The Two-fighted conveying screw elements with long-pitch are prevalently utilized in the screw feeding zone and the venting zone, where the material is typically partially filled. Short-pitch screw elements are mainly employed for pressurization or to space kneading blocks to increase residence time and facilitate material melting.

Technical Details of Two-fighted Screw Elements

Model：Φ18mm~φ400mm
Material：N00/W6/HIP
Properties: Wear-resisting, Corrode-resisting and Durable

The materials for selection and the heat treatment

△ The nitrided steel, N00 72h two-stage gas nitriding);
△ The high-speed tool steel, W6 (vacuum quenching);
△ The die steel, D2(1.2379, SKD11,K110) (quenching + tempering);
△ The bimetal composite rods (inside tough, outside hard or corrosion resistant), supplied by SAAR company from German or HTM company from Swiss;
△ Other special materials such as Hastelloy, W-C, nickel-based alloy, etc.

Two-fighted Screw Elements Function

1. Excellent material performance
2. Short and limited residence time
3. Good self-wiping

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