Screw and barrel made of nitrided 38CrMoALA wear resistant, corrosion resistant, high strength pvc wire coating machineApplication : This kind of extruder has wide application . adopt different screw structure types, installed with siutable die head and downstream equipments, can produce all kinds of polymer products, can produce from HDPE, PP, ABS, PVC, PET, PC, PS and other plastics material to ...