... 2)Nitriding treatment 3)Bimetallic welding PVC Injection molding machine single screw barrel We ,Lucheng screw Machinery Factory, is one of the most professional ... transportationThe production of screw barrel type:1. injection screw barrel, injection Molding screw barrel,screw tips/screw nozzle,2.single screw barrel3. Twin screw barrel4. Twin Conical screw and barrel(Co-rotating,Counter ...