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The composition of hot runner system
May 23, 2017

The hot runner gating system can be understood as an extension of the injection molding machine. The function of the hot runner system is to adversely heat the thermoplastic melt near the forming die or directly into the mold. The hot runner can be heated independently and thermally insulated in the injection mold so that it can individually compensate for the heat loss due to contact with the "cold" mold.


Hot runner molds have been successfully used to process a wide range of plastic materials, and plastic materials that can be processed with cold runner molds all can be processed with hot runner molds. Its parts in the smallest of 0.1 grams or less, the largest in more than 30 kg. Hot runner mold in the electronics, automotive, medical, daily necessities, toys, packaging, construction, office equipment and other fields have a wide range of applications.


A successful hot runner mold application project requires multiple links to be protected. One of the most important of these two technical factors: First, the control of plastic temperature; the second is the control of plastic flow.


A typical hot runner system consists of the following parts:


First, Hot runner plate


The hot runner plate is the core element of the hot runner system. Commonly type of hot runner plate are: “一” type, H type, Y type, X font; On the structure,There are external heating hot runner plate and internal heating hot runner board.


Second, the nozzle (NOZZLE)


according to the nozzle structure,Hot runner mold have different forms, types are similar, but the various manufacturers of processing technology and implementation methods are very different, which determines the hot runner system quality and price differences.


As the hot nozzle form directly determines the hot runner system selection and mold design and manufacturing, and thus often corresponding to the hot runner system is divided into open hot runner system and needle valve hot runner system.


Third, hot runner temperature controller


The function of Hot runner temperature controller is to control the temperature of the hot runner system.Type have single point control,double point control and touch screen control.according to the needs of users,hot runner controller could be used with other components in-mold.

 300S-8-zones hot runner controller.jpg

Fourth, auxiliary parts, such as hot runner heater

The hot runner heater is an important part of the hot runner system, and its heating accuracy and service life have great influence on the control of the injection molding process and the stability of the hot runner system. Generally have heating rods, heating rings, tube heaters, coil heaters and so on.

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