Application of Visualization Die Casting System to Study the Effect of Feed Geometry on Melt Filling Angle in Die Casting Molds

• Main Authors: Huang, Ci-Wun, 黃麒文
• Other Authors: Juang, Shuei-Wan
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/30802510826031389386

碩士 === 國立臺灣海洋大學 === 機械與機電工程學系 === 105 === In the die casting processes, the gating design would be one of major factors affecting the casting quality. If the design is undesirable, the filling pattern of melt into the die cavity would be improper, resulting in defects and poor quality castings. For instance, as melt passing the gate, it might impact the mold. This would lead the erosive action on the mold by the melt with high velocity and temperature. The aims of this study are to apply CAE techniques and visualization system to study the influence of gate thickness, land length, land angles and feed angles on the filling direction into the die cavity, respectively, in order to diminish the direct erosion on mold and improve the flow behavior of the melt. In the study, a numerical experiment is conducted with water by using a commercial software to simulate the flow behavior. Then a visualization system is used to verify its reliability of the numerical experiment by obtaining the influence of gate thickness, land length, land angle, and feed angle on the flow angle into the cavities. The studied results evidently showed that the land angle plays the most significant effect on the flow angle, than the gate thickness. It was found that the effect of feed angle on the flow angle is not apparent. The results obtained from the study would give die makers a valuable reference to design the feed geometry without direct eroding the mold.