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Structural form and application advantages of hot runner plastic injection mold

Mar 22, 2019

The structure of the hot runner plastic injection mold can be simply divided into two types, one is a single-point hot runner injection mold, and the single-point gate hot runner is a single nozzle that directly injects the melt into the cavity, or the melt is heated. The nozzle first enters the normal flow path and then enters the cavity.


There is also a multi-point hot runner plastic injection mold that splits the molten plastic into the nozzles through the hot runner plate and into the cavity or the common flow path. It is suitable for single-chamber multi-point feeding or multi-cavity. Injection mold, its basic structure. This mold is provided with a hot runner plate and a secondary heat gun.

 The molding cycle of the hot runner plastic injection mold is shortened. Since there is no limitation of the cooling time of the sprue system, the workpiece can be ejected in time after being solidified. Many thin-walled parts produced with hot runner molds have a molding cycle of less than 5 seconds; and there is no production cost because hot runner technology is an effective way to reduce material costs by reducing material costs.

 During the hot runner plastic injection molding process, the plastic melt temperature is accurately controlled in the runner system. Plastics can flow into the cavities in a more uniform state, resulting in consistent quality parts. The hot runner molding parts have good gate quality, low residual stress after demolding, and small deformation of parts. Therefore, many high quality products on the market are produced by hot runner molds.