pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (29권3호 138-143)
Improvement of Mold Filling in Aluminum Gravity Die Casting by Vacuum Suction
알루미늄 합금의 중력금형주조 시 진공감압을 이용한 충전성 개선
Jeong-Kook Kim, Ki-Young Kim*
Shin Young Unique Co, *Korea University of Technology and Education
Vacuum suction is applied to the mold during pouring in the inclined gravity die casting to remove defects such as misrun and gas porosity in the brake master cylinder. Casting defects are observed after solidification and their cause is analyzed by using the calculated results with commercial solidification and flow analysis code(ZCAST). The optimum vacuum suction is -2 cmHg, and when the start time of vacuum suction is 3 seconds after pouring, better filled result is obtained by holding it for 15 seconds. Reproducibility test under the optimum conditions attained from the above pouring tests is performed, and it is confirmed that these pouring conditions can be applied to the mass production immediately.
Brake master cylinder, Vacuum suction, Misrun, Burr.
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