Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
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Flow Analysis of Filling Imbalance according to Runner Shapes in Injection Mold

사출금형의 러너시스템 형상에 따른 충전불균형 유동해석 모델

  • Jang, Min-Kyu (Undergraduate School of Mechanical Engineering, Pukyong National University) ;
  • Go, Seung-Woo (Undergraduate School of Mechanical Engineering, Pukyong National University) ;
  • Kim, Yeong-Min (Undergraduate School of Mechanical Engineering, Pukyong National University) ;
  • Noh, Byeong-Su (Graduate School of Mechanical Engineering, Pukyong National University) ;
  • Jeong, Yeong-Deug (School of Mechanical Engineering, Pukyong National University)
  • 장민규 (부경대학교 기계공학부) ;
  • 고승우 (부경대학교 기계공학부) ;
  • 김영민 (부경대학교 기계공학부) ;
  • 노병수 (부경대학교 기계공학부 대학원) ;
  • 정영득 (부경대학교 기계공학부)
  • Received : 2008.06.11
  • Accepted : 2008.09.26
  • Published : 2008.10.01
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Abstract

Almost all injection molds have multi-cavity runner system for mass production, which are designed with geometrically balanced runner system in order to accomplish filling balance between cavity to cavity during processing; However, even though geometrically balanced runner is used, filling imbalances have been observed. In these day, the CAE has been used widely in injection molding. However, CAE with fusion mesh can't indicate such as jetting, flow mark and filling imbalance in multi cavity mold. In this study, we investigated the filling imbalance according to runner shapes by CAE analysis. As a result in CAE, in case of binary branch runner system, filling imbalance was indicated between cavity to cavity, but the flow pattern of each cavity uniformed in unary branch runner system.

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