Double metal screw and barrel Diameter :??60~??250mm materials :38CrMoAIA (JIS SACM645) Application: WPC. PVC. PE .PP. Super high molecular sheet, 1/2 high calcium buckle, 50 -400 high Calcium pip, 50 -300 high calcium profile , soft PVC sheet, XPS-PVC ETC,PP , PE.ABS,PVC. Pelletzing , pipe, profile, sheet and etc.... Heat-Treatment : Gas Nitrided or Bimetallic or Special alloy inner hole centrifugal casting Hardness :>950Hv Advantages: 1.good plasticization, high productivity, small shear force, stable pressure, less wear and tear and low cost. 2.lower rotation speed, smaller shear stress between the small screw 3.parallel twin screw barrel is successfully applied in PVC plate , pipe, profile, pellet and mould, at the same time, it solved the techical problem of low foaming , high foaming , high filling ,wear and corrosion. About JIAWEI SCREW AND BARREL : Our Strength: We have an experience professional manufacturing and designing Plastic machines, varied Screws and Barrels and spares. We concentrate on improving quality, updating design and enhancing service. Our products: Screws Barrels for Injection, Extrusion, and Blow Molding applications; relevant accessories; plastic processing machinery. Location advantage: located in China's Screw Town - Jintang Town in Zhoushan City, near to Ningbo Port and Shanghai Port. Market areas: global sales network reaching South America, Eastern Europe, Southeast Asia, Africa, Oceania and the Middle East. We promise: We assure the customer benefits, We provide competitive price, We Emphasis On Cooperation.