Study on Effects of Foam-Filter for Reduction of Air-Trapping in Large-Size Sand Gravity Casting

대형 중력주물품의 기공발생 저감을 위한 다공성 필터 (Foam-Filter) 적용효과 분석

Yu, Jae Hyun;Lee, Ho Rim;Joo, Jeong A;Hwang, Yun Je;Shin, Bo Sung;Park, Sang Hu

  • Received : 2015.09.09
  • Accepted : 2016.01.22
  • Published : 2016.06.03


In this work, casting processes, such as filling and solidification, were simulated in order to accurately predict volume shrinkage defects in large-sized sand gravity casting. Turbulent flow of melted materials and a difference of solidification speed can cause volume shrinkage defects. In order to solve this problem and to understand the phenomenon, a porous filter application was studied. Two different porosities of 10 and 20 p.p.i filters were introduced into the gating system, and in view of the results so far achieved, the defect was dramatically reduced by 22%, compared to that without the use of the filter.


Shrinkage;Filling analysis;Solidification analysis;Heat transfer analysis;Foam filter


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Supported by : 한국연구재단, 미래창조 과학부