Abstract

In the injection molding process, the filling process will be easier and, in most cases, the surface quality will be significantly improved if the mold surface temperature is high. However, as the temperature of the mold plates rises, the cooling process takes longer, the injection molding cycle takes longer, and the cost of production rises. The most important thing is to keep the mold temperature under control, which means heating the mold surface to the required temperature while keeping the injection cycle time to a minimum. In this research, hot air was used as the heat source for raising the cavity temperature to over 200 °C with a heating time of 20 s. At the end of heating process, the temperature was collected at 10 points for comparison. In addition, the temperature distribution was also discussed.

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