In plastics extrusion molding equipment, plastic extrusion machine is usually referred to as the host, and subsequent equipment with matching plastic extrusion molding machine is referred to as the auxiliary. Plastic extruder after 100 years of development, has been developed from the original single screw derived double screw, screw, even without the screw, and other models. Plastic extruder (host) and pipes, films, with material, monofilament, flat wire, packing tape, squeeze net, plate (sheet material), special-shaped material, granulation, such as cable coated all kinds of plastic molding auxiliary machinery, all kinds of plastic extrusion molding production lines, production of various plastic products. Therefore, plastic extrusion machinery for no matter now or in the future, are widely used in plastic processing industry of one of the models.