In the production of plastic products, many of them are produced by extrusion. As long as the extrusion process is used in the production process, a plastic extruder is used for extrusion molding. The extrusion line of plastic products includes two parts: granulation and extrusion. This is because plastic products are usually produced by extrusion of plastic granules during production, so we first make plastic raw materials when we produce our products. Granulation and extrusion before plastic pellets can be used to produce the product. The production of plastic granules is to match the raw materials according to the specific product quality, and all the raw materials are mixed according to the formula, and finally these materials are uniformly mixed in the mixer. After the raw materials are evenly mixed, they can be put into the plastic granulator for extrusion. At this time, the plastic pellet machine extrudes a plurality of cylindrical strip products. After the product is cooled by water, it is pulled to the pelletizer for pelletizing. We can get the plastic pellets we need. For example, plastic products are selected according to the size of the product to select the appropriate type of plastic extruder for feeding extrusion. The plastic particles enter the screw barrel through the feeding system of the extruder, and then are cut by the screw. A series of processing such as compression, mixing, etc., and finally the plastic raw material is extruded into the extruder at the die of the plastic extruder to obtain the shape of the product we need. After the product is extruded, it needs to be cooled by water to get the products we need.