한국금형공학회:학술대회논문집

Korean Society of Die & Mold Engineering (한국금형공학회)
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The Effect of Filling Imbalances on the Molding Quality in the Multy-Cavity Injection Mold

다수캐비티 사출금형에서 충전 불균형이 성형 품질에 미치는 영향

  • Han, Dong-Yeop (Department of Mechanical Engineering Pukyong National University) ;
  • Jeong, Yeong-Deug (Department of Mechanical Engineering Pukyong National University)
  • 한동엽 (부경대학교 기계공학과 대학원) ;
  • 정영득 (부경대학교 기계공학부)
  • Published : 2008.06.24
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Abstract

The injection molding process is a predominant method for producing plastic parts. In order to maximize productivity and molding quality in a injection mold, it is important that each cavity in a multi-cavity injection mold is identical. This requires that cavity dimensions should be identical and delivery system of melt to each cavity have to be the same. Despite the geometrically balanced layout in multi-cavity injection mold more than 4 cavities, it has been observed that the filling in each cavity results in imbalances. Most of cases, this phenomenon of filling imbalances have a bad effect on dimension accuracy, warpage, molding appearance and strength of molding parts. In this study, experiment were conducted to investigate the effect of filling imbalances on the molding quality(surface gloss, shrinkage, tensile strength) in the multy-cavity injection mold.

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