The working principle of injection molds is based on the thermoplastic properties of plastics and the injection pressure of injection molding machines. Firstly, plastic particles are heated and plasticized inside the barrel of the injection molding machine, forming a molten state. Then, the injection molding machine injects the molten plastic into the mold cavity through high pressure. In the mold, the plastic is cooled and solidified to form the desired shape and structure. Finally, by opening the mold, the formed plastic product is taken out of the mold.

Injection mold is a tool used for producing plastic products, whose main function is to give plastic products a complete structure and precise dimensions. Injection molding is a commonly used processing method for mass production of complex shaped parts. The specific process is to inject the melted plastic into the mold cavity of the mold under high pressure from the injection molding machine, and after cooling and solidification, obtain the required formed product.