Attention should be paid to the nozzle temperature and the mold temperature when performing injection molding. The main reason is that the temperature of the nozzle will affect the plasticization and flow of the plastic. The temperature of the mold mainly affects the flow and cooling of the plastic. If the control is not good, it will have a great impact on its internal performance and the quality of the barrel. Normally, the temperature of the nozzle is usually slightly lower than the maximum temperature of the barrel; the temperature of the mold depends on the crystallinity of the plastic, the size and structure of the product, and the performance requirements. Therefore, in the injection molding process of Shandong plastic barrels, temperature control is very important.