Abstract: Provided are: an instrument panel capable of stably deploying a deployment part; and a method for manufacturing the instrument panel. An instrument panel is provided with: a base part; and a deployment part which is surrounded by the base part, faces an air bag, and includes a tear line, wherein a slit structure including a plurality of slits arranged so as to surround the tear line is formed in the deployment part.

Abstract: Provided are: an instrument panel capable of stably deploying a deployment part; and a method for manufacturing the instrument panel. An instrument panel is provided with: a base part; and a deployment part which is surrounded by the base part, faces an air bag, and includes a tear line, wherein a slit structure including a plurality of slits arranged so as to surround the tear line is formed in the deployment part.

Abstract: Provided are an injection mold and an injection molding method by which a boundary line between a first material and a second material curved so as to be sharply bent like a round chamfered shape can be formed reliably in a desired position, and a molded article molded using the injection mold and the injection molding method. The sum of a length w of an inclined-part forming part 51a and a length y of a thinned-part forming part 51b in a width direction of a linear part or a width direction of a curved part is at least equal to a prescribed value, and the thinned-part forming part 51b forming the curved part has a second length y longer than a first length in the width direction of the curved part.

Abstract: Provided are an injection mold and an injection molding method by which a boundary line between a first material and a second material curved so as to be sharply bent like a round chamfered shape can be formed reliably in a desired position, and a molded article molded using the injection mold and the injection molding method. The sum of a length w of an inclined-part forming part 51a and a length y of a thinned-part forming part 51b in a width direction of a linear part or a width direction of a curved part is at least equal to a prescribed value, and the thinned-part forming part 51b forming the curved part has a second length y longer than a first length in the width direction of the curved part.

Abstract: An injection molding apparatus includes an injector that obtains molten resin by melting resin, and injects the molten resin, a hot runner that is a flowing path of the molten resin, and a temperature rising part that is provided in a part of the hot runner, and increases a temperature of the molten resin to be higher than a melting temperature in the injector.

Abstract: An injection molding apparatus includes an injector that obtains molten resin by melting resin, and injects the molten resin, a hot runner that is a flowing path of the molten resin, and a temperature rising part that is provided in a part of the hot runner, and increases a temperature of the molten resin to be higher than a melting temperature in the injector.