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Improvement of Mold Filling in Aluminum Gravity Die Casting by Vacuum Suction  

Kim, Jeong-Kook (Shin Young Unique Co)
Kim, Ki-Young (Korea University of Technology and Education)
Publication Information
Journal of Korea Foundry Society / v.29, no.3, 2009 , pp. 138-143 More about this Journal
Abstract
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.
Keywords
Brake master cylinder; Vacuum suction; Misrun; Burr;
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  • Reference
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