Patent ID: 7135139

Claim:
A method of producing a molded object, comprising steps of: filling a cavity of a mold assembly with resin so as to form at least one surface of the molded object in a predetermined shape with at least one transfer surface of the cavity; and cooling the resin filled in the cavity so as to solidify the resin; wherein when the resin in the cavity is cooled, as the resin in the cavity shrinks and a pressure in the cavity becomes lower than a pressure of an atmospheric air guided through a communicating path communicating with a surface of a molding insertion member that forms another surface of the molded object other than the surface formed in the predetermined shape by the at least one transfer surface of the cavity, at a side opposite to a cavity side and outside of the mold assembly, the atmospheric air is sucked into the communicating path toward the molding insertion member and the molding insertion member is deformed toward the cavity so as to form a sink at the another surface of the molded object and to bring the at least one surface of the molded object into tight contact with the at least one transfer surface of the cavity.