Injection Mold

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.

Injection mold can be divided into thermosetting plastic mold and thermoplastic plastic mold according to the molding characteristics; According to the molding process, it can be divided into transfer mold, blow mold, casting mold, thermoforming mold, hot pressing mold (compression mold), injection mold, etc. the hot pressing mold can be divided into overflow type, semi overflow type and non overflow type in the way of overflow, and the injection mold can be divided into cold runner mold and hot runner mold in the way of gating system; According to the loading and unloading mode, it can be divided into mobile type and fixed type.

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. Among them, the gating system and molding parts are the parts in direct contact with plastics and change with plastics and products. They are the most complex and changing parts in the plastic mold, which require the highest machining finish and precision.

The injection mold consists 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. In order to reduce the heavy workload of mold design and manufacturing, most injection molds use standard mold bases.