Conical Twin Screw for PVC Extruder 

Quality requirements and technical standard: The products use 38CrMoAlA material, the surface hardness after hardening HV ≥ 920. Finish machining and nitriding, nitrided case depth: 0.5-0.8mm. Whole barrel inner hole use SKD, screw surface spray bimetallic. The design of this screw is suitable for SPC production. We insist on "Quality is our culture" as our core way of management and administration. Customer is the first and most important. We are committed to meet customer needs with high quality and low price products.