Sand mold-producing method and apparatus

摘要

A sand mold-producing apparatus having a sand blower for vertically supplying sand with the help of a first flow of a pressurized air into a molding cavity in which a match plate carrying thereon a pattern is positioned, and an air injecting means for laterally injecting a second flow of a pressurized air having a pressure equal to or smaller than that of the first flow toward the pattern, so that the second flow of the pressurized air carries the sand toward every lateral pocketed pattern portion of the pattern and corners adjacent to the pattern during the supply of the sand into the molding cavity.