Injection molding machine is a common plastic machinery. For operators who use and purchase injection molding machines, they should first understand the performance of a good injection molding machine and which aspects need to be evaluated before choosing a satisfactory injection molding machine. Purchase the technical parameters of the injection molding machine. When users choose injection molding machines, they can be judged by vertical or horizontal comparison. The so-called " longitudinal " means that the main technical parameters of the injection molding machine should meet industry standards and be reviewed according to industry standards. The so-called " horizontal " is to compare the technical parameters of similar injection molding machines at home and abroad. Therefore, this is a very careful scientific work. According to the material, shape, structure, and application fields and specific occasions of injection molded products ; according to the structure, quality, precision, number of cavities, type of runners, and structure, shape, and size of the mold; according to the day, month, and size of the product The annual production capacity and the degree of automation are used to select various parameters of the injection molding machine.