a casting method for manufacturing various types of ceramics products having an intricate configuration and a partly diversified wall thickness , such as compressor scroll blade and a screw rotor , by casting a slurry including ceramics , etc . in a mold , includes an arrangement wherein the mold is partly or entirely formed of a flexible gel material which can be melted by heating at a temperature lower than the boiling point of the dispersion medium , whereby the stresses generated when molding the product can be mitigated . thus , the molding of a product having a high level of dimensional accuracy can be carried out with ease .