605 プラスチック射出成形金型の冷却管配置設計(J02-1 解析・設計の高度化・最適化(1),J02 解析・設計の高度化・最適化)

抄録

In this paper, a design procedure to decide a cooling pipe system in plastic injection moldings is presented. When plastic products are molded, residual stresses that cause warps and cracks in some years after molding are generated by a nonuniformity of temperature cooling rate in the die. The shape and layout design of cooling pipe system is the most effective factor for the improvement of distributions of coolant flow and temperature in the die. In this study, the distributions are analyzed by the Finite Element Method (FEM). Then, to reduce the residual stresses, an optimum cooling pipe system to give a uniform temperature distribution in the die is proposed. It is found how effective the cooling pipe system is given in the optimum design.