Tongfa Plastics Machinery Co., Ltd is specilaized plastics machinery manufacturer in Zhoushan City, China. The conical co-rotating twin-screw extruder we invented has been granted the China National Patent of Invention(Patent No.:ZL 200510118915.3). The conical co-rotating twin screw extruder is a new technology, it works with possible highest mixing effect and extrusion pressure, but with a low power consumption. The conical co-rotating twin-screw extrusion machine is able to manufacturer a large range of plastics like PP, PS, PE, ABS, PC and PVC, wooden plastic to tube, plate and film, as well as pelletizing.