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Vibration Characteristics of Compaction Table for Expendable Pattern Casting Process through Changing Vibration Modes  

Lee, Kang-Rae (Korea Institute of Industrial Technology)
Choe, Kyeong-Hwan (Korea Institute of Industrial Technology)
Cho, Gue-Serb (Korea Institute of Industrial Technology)
Lee, Kyong-Whoan (Korea Institute of Industrial Technology)
Kim, Myung-Ho (School of Materials Science and Engineering, Inha University)
Rim, Kyung-Hwa (Dept. of Control System Engineering, Korea University of Technology and Education)
Kim, Ki-Young (Dept. of Advanced Materials Engineering, Korea University of Technology and Education)
Publication Information
Journal of Korea Foundry Society / v.24, no.5, 2004 , pp. 273-280 More about this Journal
Abstract
Vibrational motions of the compaction table were investigated to select the optimal operation conditions of sand filling and compaction for the EPC process. Their modes were measured at the nine points of the table with changing the relative rotation angles between the two eccentric mass vibrators which were attached parallel beneath the table. Well-defined vibration modes were measured at the center of the table but those of left and right sides of the table were distorted regardless of rotational angle differences. The distortion of vibration modes at both sides of the table were caused by the moment generated by offset positions of two eccentric masses. It was found that the uniform vibration modes would be gathered by controlling the relative distances between the rotating axis and the center of gravity in the compaction system at the various conditions of vibration modes and rotational angle differences.
Keywords
vibrating table; EPC; vibration mode; moment; rotational angle differences;
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  • Reference
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