Method of molding a sand mold with the use of foamed sand, casting mold and sand mold

摘要

A method of molding a sand mold with a hardened layer in a predetermined thickness range of a outer-layer part from, comprising the following: a forming a cavity and a fill opening of a shape, so that a dimension b, which a greatest dimension between two points of intersection of straight lines, by a portion of a boundary region between the hollow space and the filler opening in the form of guiding, with respect to a boundary line of the section is less than a predetermined ratio with respect to a thickness dimension d of this part of a product section of the sand mold is, from which an inflation opening, which is formed in the inlet opening, wherein the product portion by the cavity of the mold is formed; and a filling of foamed sand into the hollow space of the filling opening of the mold made of.