Zhoushan Qunying Plastic Machinery Manufactory

To all our old or new friends: Thanks for your visiting.Qunying screw, our is one of the best machinery parts supplier in China.We cooperate with many machine factories.We produce screw and barrel over 10 years in China,rich experience in producing or designing.Choose Qunying, you best choice! Technical Parameters for screw and barrel: Diameter: Ø15-Ø300 L/D ratio:15-55 Or other according to requirement, we are rich experience in producing and designing! Product Plastic bimetallic film blowing screw barrel Material 38 CrMoAlA(JIS SACM645); 42 CrMo(AISI 4140) Cr12MoV(JIS SKD-11);4Cr5MoSiV1(JIS SKD-61) Nitrided Hardness HV900°~1000° Hardness after hardening and tempering HB260 ° Nitrided Depth 0.5~0.7mm Nitrided Brittleness above 2 stage Surface Roughness Ra0.4 Screw straightness 0.015mm Hardess of surface chromium-plating after Nitriding HV≥950HV Chromium plating Depth 0.05~0.10mm Alloy Depth 0.8~3.0mm Alloy hardness HRC56°~65° Alloy(bimetallic) iron,nickel,tungsten,molybdenum Types of screw barrel Gradual type,mutant type,wave type,barrier type,double screen type,shunt type,separation type,exhaust type,pin type,mixed type,double-head type,three-head type,multi head type etc.