Jinsheng Bimetallic Plastic Machinery Factory was established in 2004. It was developed as a large-scale and comprehensive company specializing in manufacturing the kinds of Screws and Barrels in Zhoushan.such as bimetallic barrel & screw conical twin screws & barrels parallel twin screws & barrelssingle screw &barrel rubber screw & barrel planetary screw & barrel and components apply for injection molding machine and extruder machine .