Koito Manufacturing Company, Ltd.

Koito Manufacturing., Ltd.

Tsukasa Ishiwata

Hiroya Ito

Takatoshi Inoue

Noriyuki Nakajima

Jyunya Sano

A mold device includes a primary mold and a secondary mold. The primary mold includes a cavity mold and a primary core mold. The primary mold is configured to inject a first resin material into a first cavity to mold a primary molded product, the first cavity being formed by clamping the cavity mold and the primary core mold. The secondary mold includes the cavity mold and a secondary core mold. The secondary mold is configured to inject a second resin material into a second cavity to stack mold a secondary molded product on a peripheral edge of the primary molded product. The second cavity is formed by clamping the cavity mold and the secondary core mold. The cavity mold is configured to hold the primary molded product. The cavity mold includes a primary molded product holding portion configured to project into and retract from the first cavity, on a parting line of the primary mold. The secondary core mold includes a slide portion configured to project into and retract from the second cavity on a parting line of the secondary mold. The slide portion having a shape that complements the primary molded product holding portion. At the time of mold opening in primary molding, the primary molded product holding portion protrudes into the first cavity locks an end surface of the primary molded product to hold the primary molded product in the cavity mold. At the time of mold clamping in secondary molding, the primary molded product holding portion retracts from the second cavity and the slide portion slides relative to the primary molded product holding portion to protrude into the second cavity, to define the second cavity.

Mold device and injection molding method

A resin-molded component includes a first molding part, and a second molding part. A portion of the first molding part and a portion of the second molding part are laminated in a direction of connecting an outer surface and an inner surface of the resin-molded component to provide a laminated portion. A portion of the second molding part is provided as an exposed portion. Each of portions of the laminated portion is located at least on opposite sides across the exposed portion. A one-side surface of the exposed portion in the laminating direction of the laminated portion is configured as a portion of the outer surface and the other-side surface thereof is configured as a portion of the inner surface.

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Shizuoka, Japan

Tsukasa Ishiwata