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The Behavior of Chill Layers with Temperature Variation of Shot Sleeve in Aluminum Diecasting Process  

Park, Jin-Young (R&D Center, Dongnam precision Co., Ltd.)
Kim, Eok-Soo (Pusan R&D Center, Korea Institute of Industrial Technology)
Park, Ik-Min (Dept. of Metallurgical Engineering, Pusan National University)
Publication Information
Journal of Korea Foundry Society / v.25, no.4, 2005 , pp. 168-172 More about this Journal
Abstract
In this study, the effects of chill layers occurred in shot sleeve on the molten metal filling were analyzed through computer simulation and the behavior of chill layers with temperature variation of shot sleeve set from 200 to $280^{\circ}C$ was also investigated. The simulation results showed the chill layers set in the in-gates during the injection process change the main filling direction and cause turbulent flow pattern, resulting in porosities inside the castings. The amount of chill layers with the increasing temperature of shot sleeve was considerably reduced. And particularly, at the setting temperature of $280^{\circ}C$ by heat control unit, the big reduction in chill layers, excellent trimmed surface and the highest densification were achieved, suggesting that as the optimal sleeve condition in diecasting, especially for the highly complex parts like valve body.
Keywords
Chill layer; Computer simulation; Sleeve heat control unit; Valve body;
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  • Reference
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