pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (25권4호 168-172)
The Behavior of Chill Layers with Temperature Variation of Shot Sleeve in Aluminum Diecasting Process
알루미늄 다이캐스팅 공정에서 사출 슬리브 온도변화에 따른 파단칠층의 거동
Jin-young Park, Eok-soo Kim*, Ik-min Park**
Dongnam precision Co., *Korea Institute of Industrial Technology, **Pusan National University
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℃ 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℃ 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.
Chill layer, Computer simulation, Sleeve heat control unit, Valve body.
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