Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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A Study on the Filling Imbalances between Multi-Cavity in Hot-Runner Mold

핫러너 금형에서 다수 캐비티 사이에 발생하는 충전불균형에 관한 연구

  • 한성렬 (부경대학교 기계공학부 대학원) ;
  • 강철민 (부경대학교 기계공학부 대학원) ;
  • 한규택 (부경대학교 기계공학부) ;
  • 정영득 (부경대학교 기계공학부)
  • Published : 2005.09.01
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Abstract

Recently plastic parts are molded for the purpose of mass production in multi-cavity system. Therefore, designer is usually designing mold that has geometrically balanced runner lay-out for filling balance at each cavity. Although, mold is manufactured with geometrically balanced runner lay-out, there are actually filling imbalances in the cavities. These filling imbalances phenomenon are caused by complicated interaction between melt and mold. In this study, based on previous studies for filling imbalances in cold-runner mold, filling imbalances in hot-runner mold were investigated by CAE and injection molding experiments. ABS and PMMA as amorphous polymer, PA as crystalline polymer were used to compare the filling imbalances. There were different results of CAE and experiment. The filling imbalances decreased as injection rate increased without regard to kind of resins and were lower than the one of cold-runner.

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References

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