Method for forming cast article by slip casting

A method for forming a cast article by slip casting through casting of a slip into a casting mold composed mainly of gypsum and removing of the casting mold after solidification of the slip, which comprises making an integrated casting mold composed of a first layer on the cavity side of the casting mold and a second layer having a higher heat-resisting strength than that of the first layer and capable of repeated use on the back side of the first layer as the casting mold, heating the integrated casting mold prior to casting the slip into the integrated casting mold, the integrated casting mold being heated at a temperature of 120.degree.-130.degree. C. such that the strength of the first layer is lowered, but is kept within a shape-maintainable range, then casting the slip into the integrated casting mold, and removing the first layer therefrom, thereby obtaining a green body, whereby cracks and internal stresses in the green body due to the strength of the first layer are avoided.

A method for forming a cast article by slip casting through casting of a slip into a casting mold, the casting mold being made of a material whose strength is reduced by heating, which comprises heating the casting mold prior to casting the slip therein, said casting mold being heated at a temperature of 120.degree.-130.degree. C. such that the strength of the casting mold is lowered, but is kept within a shape-maintainable range, then casting the slip into the casting mold, forming a green body from the slip, and removing the casting mold, whereby cracks and internal stresses in the green body due to the strength of the casting mold are avoided.