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사출금형에서 균형충전을 위한 새로운 러너시스템 멜트버퍼
정영득(Y. D. Jeong),장민규(M. K. Jang) 한국소성·가공학회 2009 소성가공 : 한국소성가공학회지 Vol.18 No.2
The injection mold with multi-cavity is essential for mass production of plastic products. Multi-cavity molds are designed to geometrically balanced runner system to uniformly fill to each cavity. However, despite geometrical balanced runner system, filling imbalances between cavity to cavity have always been observed in injection molding. To solve these problems, many studies such as Melt Flipper, RC Pin, and others have been presented. The results of these studies have been an effect on filling balances in multi-cavity molds. But, those have had a limitation that additional insert parts must have existed in the mold. In this study, a new runner system is suggested for filling balance between cavity to cavity using “Melt-Buffer” with simple change of runner shape. A series of simulation to confirm feasibility of Melt-Buffer?s effects was conducted using injection molding CAE program. Also, a series of injection molding experiment was conducted using plastic materials such as ABS and PP. As results of this study, feasibilities of filling balances by Melt-Buffer were confirmed.
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