Abstract：In this paper, milling cutter was prepared, by metal injection molding (MIM) process under four gate patterns with different numbers and locations. Combined with Cross-WLF viscosity model, the influence of the gate patterns on powder concentration was analyzed using Moldflow2017 software. The results show that the position and the number of the gates can affect the distributions of the powder in the milling cutter. While filling, the pressure has little effect on the distribution of powder concentration. For, different gate patterns, the change of shear rate of the feeding is different during the filling process, thus the distribution of powder concentration appears obvious difference. Using two gates in the end of handle plane, while filling, the distribution of powder concentration is in the range of ±0.5%. The powder distribution is evenly distributed, which meets the requirements of injection molding process. It is the optimal gate patterns when milling cutter is prepared by MIM.
刘飞, 李文明. 数值模拟研究浇口方式对粉末注射成形铣刀粉体分布的影响[J]. 粉末冶金材料科学与工程, 2018, 23(3): 292-297.
LIU Fei, LI Wenming. Numerical simulation research on the effect of gate patterns on powder volume fraction variation of MIM milling cutter. Materials Science and Engineering of Powder Metallurgy, 2018, 23(3): 292-297.
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2018, Vol. 23 
