pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (27권1호 2-47)
Mold Cavity Filling by Gating Design in Vacuum Molding Process
진공흡입주형 주조법에서 탕구방안에 따른 주형 충전 양상
B ok Hyun Kang, K i Young K im, Myung Han K im *, and Young Myung H o n g **
Korea University of Technology and Education, *Chungbuk National University, **Korea Institute of Industrial Technology
Vacuum molding process(V-process) has several benefits such as a lower total production cost and a high quality casting comparing to the conventional sand molding. Influence of the gating design on the molten metal flow was investigated in this study. General criteria for the gating design of the castings and commercial codes for the flow and solidification analysis were used to attain the optimized gating design in V-process. Though mold cavity was filled smoothly under the low initial velocity of molten metal, molten metal dashed against the upper part of the mold before the completion of the mold filling with higher initial molten metal velocity and fell soon. This phenomenon may affect collapsing the mold shape, however it is thought that the possibility of burning out of the vinyl by the molten metal is not so high because vinyl is coated with refractory material.
vacuum molding process, gating design, flow analysis, initial velocity of molten metal.
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