阶梯浇注系统中从分配直浇道底端引入金属液的效果

Effect of Introducing Molten Metal from the Bottom of Distributing Sprue in Step Gating System

用FLOW-3D软件分别对金属液从分配直浇道顶端引入以及底端引入两种阶梯浇注系统进行了充型数值模拟,获得了各层内浇道充型顺序和流入金属液质量占比。结果表明,底端引入式阶梯浇注系统可以实现自下而上的逐层充型目标,底层内浇道充型金属液量可以降到45%以下。

The filling process of two types of step gating systems in which molten metal introduced from the top or bottom of the distribution sprue was numerically simulated by FLOW-3D,the mold filling sequence and inflow mass percentage of the molten metal in the ingate of each layer were obtained.The results showed that the bottom entry step gating system can achieve the goal of bottom-up layer by layer inflow,and the mass percentage of the molten metal flowing from the bottom ingate can be reduced to less than 45%.