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pISSN : 1598-706X / eISSN : 2288-8381


한국주조공학회지 (25권4호 173-178)

The Effects of Vacuum-Molding Process Conditions on the Fluidity of A356 Alloy

A365 알루미늄합금의 유동도에 미치는 진공흡입조형 조건의 영향

Youngjin Oh, Eunsik Kim, Myunghan Kim, Youngrnyung Hong*

Chungbuk National University, *Korea Institute of Industrial Technology


The vacuum molding process is one of the clean-foundry molding-processes that can recycle molding sands repeatedly, because molding can be accomplished by introducing vacuum only among dry molding sands in flask. The effects of molding conditions such as sand grain fineness, vacuum pressure and coating thickness on the fluidity of A356 Al alloy were studied and the results was obtained that the fluidity length was decreased as the sand grain fineness number and coating thikness were decreased and the vacuum pressure was increased. A large amount of heat removal from the molten metal resulting from the vacuum suction during the vacuum molding process was the principal cause of this decrease in fluidity.


Vacuum molding process, F luidity, A356 alloy, Sand grain fineness, Vacuum pressure, Coating thickness.