Screw barrel for injection moulding machine Screw diameter:Φ15mm-Φ360mm L/D=15-56 Length of screw and barrel/cylinder:8000mm According to different material and plastic products to design different screw structure ,compress rate and L/D! According to different material and plastic products to design different Barrel with exhaust system and IKV force load system! As per customers' demand,we can supply below: PVC/PE Film Blowing Screw; Blow Molding Screw; PS/PE/PP/ABS Sheet Extrusion Screw; PE Aluminum Plate;PPR Pipe Screw;EVA Extrusion Screw;HDPE High efficiency Screw;PET Straps Screw;XPS/EPE Foamed Screw;Granulation Screw,Vented single screw etc! Product screw barrel for injection moulding machine Hardness after hardening and tempering HB260 °~ Nitrided Hardness HV950°~1000° Nitrided Depth 0.5 0~0.7mm 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 0.8~2.0mm Alloy hardness HRC56°~65° Alloy iron,nickel,tungsten,molybdenum Types of screw 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.