Extrusion Conical twin screw barrel

Extrusion Conical twin screw barrel 1.Conical twin screw Conical twin screw is suitable for extrusion processing PVC pipe,sheet and plate Super conical twin-screw,applied to process of PVC pipes and shape. 2. parallel twin screw Counter twin screw and barrel is suitbale for extrusion processing PVC pipe,sheet ,pvc granule Co-rotating Twin Barrel-Screw, applied to the process of PVC and other materials. Main specification Counter-twin screw and barrel: Φ50mm-Φ180mm L/D=16 33 Conical screw and barrel of double hole: Φ35mm-Φ105mm TECHNICAL SPECIFICATIONS: MaterialSACM645,38CrMoALA,SKD61...Hardness after Hardning&TermperingHB240-280Gas Nitrided timeOver96hoursSurface harndnessHRC58-62°CNitrided Brittleness≥Grade 2Nitrided Case depth0.5-0.8mmSurface RoughnessRa0.4Screw Straightness0.015mmSurface Chromium-plating's Hardness after nitriding:≥900HBChromium-Plating Depth0.05-0.10mmAlloy HardnessHRC50-65°CDepth of Alloy Layer0.8-2.0spray welding on easy damage surface with imported alloy of plasma ion to prolong process life of screw.