Abstract
The amount of deformation and the force for pattern drawing of frozen sand molds containing bentonite or ferro-silicon dust (SiO2 content ; about 85%) which has a subsidiary binding effect with moisture were investigated. The frozen sand mold containing bentonite 2 to 6% and moisture several percents considerably shrinks at freezing, but one containing ferro-silicon dust in place of bentonite shrinks a little. The resistant force for pattern drawing has a relation to the amount of deformation of the mold. The resistant force is remarkably reduced by adding such materials that drop the freezing point of water.
