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Filling Imbalance in 3 Plate Type Injection Molds with Multi-Cavity  

제덕근 (부경대학교 대학원 정밀기계공학과)
정영득 (부경대학교 기계공학부)
Publication Information
Journal of the Korean Society for Precision Engineering / v.21, no.6, 2004 , pp. 117-121 More about this Journal
Abstract
Injection molding is the one of the most important processes for mass production of plastic parts. Usually injection molds for mass production are constituted to multi-cavity runner system to manufacture the more parts at a time. Multi-cavity molds are designed to geometrically balanced runner system to uniformly fill to each cavity. But, when injection molding is performed using a mold with balanced runner system filling imbalances are occurred between the cavity to cavity. The previous studies by Beaumont at. all reported that filling imbalance occurred by thermal unbalance on the mold and viscosity variation of resins and so on. In this study, we conducted experiments in order to know the causes of filling imbalance for 3 plate type mold with 8 cavities. And we exhibited a new so called 4BF mold (4 plate type Balanced Filling Mold) to be possible filling balance. We conducted a experimental injection molding to verify the efficiency of the 4BF mold. In the results of the experiment, we could confirmed the balanced filling possibility of the 4BF mold.
Keywords
filling imbalance; Runner system; 3 Plate type mold; PP; ABS; 4BF mold(4 Plate Type Balanced Filling Mold;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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