... on developing screw and barrel for more injection and extruder machine models- Main market: South America,Eastern Europe,Mid East ... alloy coating spraying, heat-treatmentAppliance: PVC, PP, PE, PA, PC, ABS .etcDepth of Nitrated Layer: 0.5-0.7mmHardness of nitration: 950 ... screw barrel, injection Molding screw barrel,screw tips/screw nozzle,2.single screw barrel3. Twin screw barrel4. Twin Conical screw ...