赤外ふく射支援による精密射出成形法に関する研究 : 第2報, 計算機シミュレーションによる樹脂内および金型内温度分布の予測

概要

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In this study, a numerical simulation for analyzing the temperature and velocity distributions within the polymer melt was performed for an innovative injection molding process. The most important characteristic of this process is that infrared radiation energy is applied in order to control the temperature distributions within the molten polymer during the filling stage. The model used in the present study assumes that molten polymer flows at constant mean velocity between two parallel mold walls. One mold is made from metal and the other from material that is transparent to the radiation. The governing equations were solved by a finite-difference method using the control volume approach under realistic molding conditions, and the effects of radiation heating on the temperature profiles were investigated. The results clearly showed that the radiation heating prevented the usual temperature drop in the vicinity of the molded polymer surface, and decreased the shear rate within the flow passage. It was also shows that the efect on the process time (decrease in productivity). caused by this process, was much smaller than that caused by the conventional process which utilizes conduction heating.
一般社団法人日本機械学会の論文
1997-09-25