Injection molding die

An injection molding die, comprising:

• a cavity die having a molding recess formed thereon, the molding recess molding a molded-product main body on which a design surface of a resin molded product is formed;
• and
• a core die that exists to be openable and closable with respect to the cavity die and forms a cavity having the molding recess between the cavity die and the core die, when the core die is closed and coupled to the cavity die,
• the injection molding die being used in a resin molding method of causing a design surface of the resin molded product during molding to be brought into close contact with the cavity die by setting temperatures of the cavity die and the core die to be higher than or equal to a deformation temperature of a resin to be molded, wherein
• the core die has a back side molding surface, a projected-portion molding recess, and a ventilation pass, which are formed therein,
• the back side molding surface molds a back surface side on an opposite side of a top surface side on which the design surface is to be formed, by use of an inner surface of the molding recess of the cavity die of the molded-product main body,
• the projected-portion molding recess molds a projected portion that is depressed from the back side molding surface and protrudes from a back surface of the molded-product main body,
• the ventilation pass is formed to open at the back side molding surface and introduces gas from an outside of the cavity into an inside of the cavity, and
• an entirety of the back side molding surface of the core die is located in a range of 100 mm which is a shortest distance from an opening portion of the ventilation pass of the back side molding surface of the core die along the back side molding surface.