Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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A Study on the Effects of the Filter on Flow Pattern of the Traditional Gating System by the Water Modeling Experiment

수모델 실험을 이용한 전통 탕구계의 유동 양상에 미치는 필터의 영향 연구

  • Hwang, Ho-Young (e-Design Group, Korea Institute of Industrial Technology) ;
  • Nam, Cheol-Hee (Department of Materials Science and Engineering, Kyoto University) ;
  • Choi, Young-Sim (e-Design Group, Korea Institute of Industrial Technology) ;
  • Hong, Jun-Ho (e-Design Group, Korea Institute of Industrial Technology)
  • 황호영 (한국생산기술연구원 사이버설계그룹) ;
  • 남철희 (교토대학교 재료과학 및 공학과 대학원) ;
  • 최영심 (한국생산기술연구원 사이버설계그룹) ;
  • 홍준호 (한국생산기술연구원 사이버설계그룹)
  • Received : 2016.10.19
  • Accepted : 2016.12.05
  • Published : 2016.12.09
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Abstract

Casting defects, which are closely related to entrapped air bubbles and metallic oxides, occur very frequently in the casting process. Many researchers have shown that these defects can be reduced by adopting an appropriate gating system design. But, it is difficult for field engineers to identify a specific gating system that is more appropriate for their products. In this study, we tried to draw a comparison of gating system designs with and without ceramic foam filters. A ceramic foam filter was added to the horizontal runner just after the sprue to prevent air bubble generation and to reduce turbulence without change of the gating system design. To verify the effects of initial pouring velocity, the experiment was conducted with four different amounts of water volume in the reservoir. Results of the water modeling experiment applying the filter showed remarkably changed flow characteristics. Although the study confirmed that use of the filter may change the flow characteristics, it needs to be noted that only filter use alone cannot solve all the problems caused by a poorly designed gating system.

Keywords

References

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