Twin Parallel Screw Barrel for PVC Extrusion Line 

Specifications 1.Screw and barrel for plastic machine 2.Over 30 years experience in screw and barrel 3.Direct manufacture of screw and barrel          Twin Parallel Screw Barrel for PVC Pipe Extrusion Line     • Detailed Specifications    Base Material 1)38CrMoAlA(JIS SACM645) 2)Cr12MOV(JIS SKD-11) 3)4Cr5MoSiV1(JIS SKD-61)  4)42CrMo(AISI 4140)  Bimetallic Alloy Materials 1)Fe-based alloy  2)Ni-based alloy/Deloro alloy 3)Co-based alloy  4)NiCo-based alloy 5)Tungsten carbide/Wolfram carbide  Double-alloy level Level A - containing Tungsten of 40% Level B - containing tungsten of 25% Level C - containing tungsten of 9.5% Surface Treatment Heat Treatment High Frequency Treatment Nitriding treatment(120 Hours) Depth of Nitrided Layer: 0.5-0.8 mm Hardness of Nitrided Layer: 900-1020Hv (HRC56°-65°) Hard Chrome Plating treatment: Thickness of Hard Chrome Plating Layer: 0.05-0.10mm H…