Casting mold making system

摘要

In a casting mold making system for blowing and packing casting sand 41 accommodated in a receiver 2 of a blow head 1 into a cavity 36 in molding dies 35 by feeding pressurized gas into the receiver 2, the pressure of pressurized gas to be fed into the receiver 2 is discontinuously raised at least once in the course of feeding of pressurized gas into the receiver 2.