Conical Twin Screw Barrel for PVC Pipe Extruder

Product Description

The conical twin-screw is mainly used for processing products such as pipes, profiles, sheets, and wood-plastic composites. It adopts a low-shear screw design, which can reduce the risk of material thermal decomposition. The twin-screw is divided into conveying, shearing, dispersion, and mixing sections. The material passes through the screws to undergo physical modification and mixing, featuring efficient plasticization and uniform mixing.

Technical Specification

Material:High quality 38CrMoAlA
Process:Advanced nitriding & bimetallic process
Hardness After Hardening & Tempering:HB280-320
Nitrided Hardness:HV900-1000
Nitrided Case Depth:0.45-0.8mm

Material:38CrMoAIA,SACM645,AISI4140,SKD61,GHII3

Quenching Hardness:HRC55-62

Nitrided Brittleness:Less than Grade 2

Surface Roughness:Ra 0.4

Screw Straightness:0.015MM

Chromium plating layer hardness after nitriding:HV≥950HV

Chrome plate thickness:0.05-0.10MM

Alloy Depth:2.0-3.0MM

Screw Cooling:

1.Inside is water/oil cooling system
2.Outside is oil cooling system
Barrel Cooling
1.Outside is air cooling system
2.Outside is copper pipe around cooling system

Accessories:Stop ring and washers to adjust the space between screw and barrel

 Technical Parameter