Specifications
Gas vented screw & barrel have free drying, save energy, high output, produce film more brighter and so on advantage. Gas vented screw & barrel is one of important screw barrel. It have free drying, save energy, high output, extruder speed fast, producing film more brighter than ordinary screw and barrel and so on excellent characters.
Size: | screw diameter : ø90-ø150mm L/D : 20/1 ~25/1 |
Material | 38CrMoAlA 40CrMo 42CrMo High quality alloy steel |
Technology | Nitriding treatment Alloy coating sparying Heating treatment Screw fully hardening |
Specification | Depth of nitrition layer 0.5-0.8mm Nitriding treatment,surface Hardness:HV≥900-1000 Fragility of nitrition :less than grade 1 Surface roughtness :Ra 0.4um Surface of hardness of nitrated Cr coating layer ≥950HV Thickness of Cr coating layer :0.03-0.08mm |
Product appliance | Granulation ,PP,PE,PA,PC,ABS,AS etc |
