Mold injection molding is a processing method used in mass production of some complex parts. The specific principle is that the heated and melted plastic raw materials are pushed by the screw of the injection molding machine into the mold cavity of the plastic mold under high pressure, and the plastic forming products are obtained after cooling and curing.

塑胶模具由动模和定模两部分组成，动模安装在注射成型机的移动模板上，定模安装在注射成型机的固定模板上。在注射成型时动模与定模闭合构成浇注系统和型腔，开模时动模和定模分离以便取出塑料制品。

The plastic mold is composed of a moving mold and a fixed mold. The moving mold is installed on the moving template of the injection molding machine, and the fixed mold is installed on the fixed template of the injection molding machine. During injection molding, the moving mold and the fixed mold are closed to form the gating system and cavity. When opening the mold, the moving mold and the fixed mold are separated to take out the plastic products.

模具的结构虽然由于塑料品种和性能、塑料制品的形状和结构以及注射机的类型等不同而可能千变万化，但是基本结构是一致的。模具主要由浇注系统、调温系统、成型零件和结构零件组成。其中浇注系统和成型零件是与塑料直接接触部分，并随塑料和制品而变化，是塑模中复杂，变化大，要求加工光洁度和精度高的部分。

Although the structure of the mold may vary due to the variety and performance of plastics, the shape and structure of plastic products and the type of injection machine, the basic structure is the same. The mold is mainly composed of gating system, temperature regulating system, forming parts and structural parts. The gating system and molding parts are the parts in direct contact with plastics and change with plastics and products. They are the parts in the plastic mold that are complex, change greatly and require high machining finish and precision.

注塑模具是一种生产塑胶制品的工具;也是赋予塑胶制品完整结构和精 确尺寸的工具。注塑成型是批量生产某些形状复杂部件时用到的一种加工方法。具体指将受热融化的塑料由注塑机高压射入模腔，经冷却固化后，得到成形品。

Injection mold is a tool for producing plastic products; It is also a tool for giving plastic products complete structure and precise dimensions. Injection molding is a processing method used in mass production of some complex parts. Specifically, the heated melted plastic is injected into the mold cavity by the injection molding machine under high pressure, and the formed product is obtained after cooling and curing.