Plastic extruders can be divided into single-screw extruders, twin-screw extruders and multi-screw extruders according to the number of screws. At present, single-screw extruders are the most widely used and are suitable for extrusion processing of general materials. Shengxin The working principle of plastic machinery extruder. The extrusion molding process is the molding processing method with the largest variety, the most changes, the high productivity, the strong adaptability, the wide range of uses and the largest proportion of output in the field of polymer processing. The melt (or viscous fluid) of the polymer is formed through a certain shape of the die under the extrusion action of the extruder screw, and the product is a continuous profile with a constant cross-sectional shape. More detailed content is required.