conical twin screw barrel for pvc

conical twin extruderscrew and barrel for pvc screw extruder screw and barrel for plastic extrusion machinery key words: plastic extruder screw and barrel, plastic extrusion machinery screw, screw barrel, screw cylinder, plastic extruder screw barrel, plastic screw barrel, screw barrel for plastic extruder, screw and barrel for plastic extrusion machine, screw barrel for plastic extrusion machinery, single screw barrel Size:screw diameter:Φ20-Φ500mm Maximum screw length:10000mm Barrel inner bore diameter:Φ500mm Material: 38CrMoAlA 40CrMo 42CrMo high quality alloy steelTechnology: nitriding treatment, alloy coating spraying, heating treatment, screw fully hardening,Depth of nitrition layer: 0.5-0.8mm Nitriding treatment, surface hardness: HV≥900-1000 Fragility of nitrition: less than grade 1 Surface roughness: Ra 0.4um Streightness of screw: 0.015mm Surface of hardness of nitrated Cr coating layer: ≥950HV Hardness of Cr coating layer: HRC55-62 Thickness of alloy plating: 0.03-0.08mm Depth of alloy layer:2mm Used for granulation,PP, PE, PA, PC, ABS,AS etc We can manufacture various kinds of screw barrels according to the customers requirement