The purpose of this is to feed the molten metal to the mold cavity as the molten metal solidifies and shrinks, and thereby prevents voids in the main casting.
其目的是当熔化金属凝固和收缩时往型腔里补充熔化金属，从而防止在主铸件中产生孔隙。
Shrinkage cavity predication is main purpose of casting simulation.
预测缩孔缺陷产生是铸件凝固模拟的主要目的。
Gypsum powder can be classified according to purpose: building materials using gypsum powder, gypsum powder chemicals used, mold used gypsum powder, gypsum powder and food casting gypsum powder.
石膏粉根据用途可分为：建材用石膏粉、化工用石膏粉、模具用石膏粉、食品用石膏粉和铸造用石膏粉等。
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