... abs,pvc,pp,pe,pa conical twin screw and barrel We ,Lucheng screw Machinery Factory, is one of the most professional screw and barrel manufacture/exporter in China, ... 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)5. Twin Parallel screw and barrel Co- ...