Extrusion Conical Double screw barrel

Extrusion Conical Double screw barrel screw and barrel for extrusion molding machine,blow moulding machine 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.