MOLD FORMING METHOD

The purpose of the present invention is to provide a mold forming method that can partially increase the density of a mold even in locations wherein a pattern is concave with respect to a parting surface and can make the density of the mold substantially uniform. Provided is a mold forming method for forming a mold of casting sand using a casting frame and a pattern plate, comprising: a step for forming a forming space using the casting frame, a molding flask having a lower opening connectable to an upper opening in the casting frame, a squeeze head mechanism having a squeeze board capable ofentering and withdrawing from the molding flask and a plurality of squeeze feet penetrating the squeeze board and being capable of being raised and lowered relative to the squeeze board, and the pattern plate; a step for filling the forming space with casting sand within a casting sand filling hopper for storing casting sand; and a step for lowering the squeeze head mechanism and squeezing the casting sand. Simultaneously