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J. Korean Ceram. Soc. > Volume 46(3); 2009 > Article
Journal of the Korean Ceramic Society 2009;46(3): 229.
doi: https://doi.org/10.4191/kcers.2009.46.3.229
유동방향과 밀도이방성 분석을 위한 세라믹 분말사출성형 해석
곽태수, 서원선1
국립진주산업대학교 기계공학과
1요업(세라믹)기술원 그린세라믹본부
Simulation of Ceramic Powder Injection Molding Process to Clarify the Change of Sintering Shrinkage Depending on Flow Direction
Tae-Soo Kwak, Won-Seon Seo1
Department of Mechanical Engineering, Jinju National University
1Green Ceramic Division, KICET
ABSTRACT
This study has focused on manufacturing technique of powder injection molding of watch case made from zirconia powder. A series of computer simulation process was applied to prediction of the flow pattern in the inside of the mould to clarifying the change of sintering shrinkage depended on flow direction. The material properties of melted feedstock inclusive of the PVT graph and thermal viscosity flowage properties were measured for obtaining the input data in computer simulation. Also, molding experiment was conducted and the results of experiment showed that good agreement with simulation results for flow pattern and weld line location. On the other hand, gravity and inertia effect have an influence on velocity of melt front because of high density of ceramic powder particles in powder injection molding against the polymer injection molding process. In the experiment, the position of melt front was compared with upper gate and lower gate position. The gravity and inertia effect could be confirmed in the experimental results.
Key words: Modeling/model, Shrinkage, Zirconia, Simulation, Powders
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