US 12,251,864 B2
Mold device and injection molding method
Tsukasa Ishiwata, Shizuoka (JP); Noriyuki Nakajima, Shizuoka (JP); Jyunya Sano, Shizuoka (JP); and Hiroya Ito, Shizuoka (JP)
Assigned to KOITO MANUFACTURING CO., LTD., Tokyo (JP)
Appl. No. 18/267,893
Filed by KOITO MANUFACTURING CO., LTD., Tokyo (JP)
PCT Filed Dec. 10, 2021, PCT No. PCT/JP2021/045625
§ 371(c)(1), (2) Date Jun. 16, 2023,
PCT Pub. No. WO2022/131165, PCT Pub. Date Jun. 23, 2022.
Claims priority of application No. 2020-210763 (JP), filed on Dec. 18, 2020.
Prior Publication US 2024/0066774 A1, Feb. 29, 2024
Int. Cl. B29C 45/16 (2006.01); B29C 45/26 (2006.01); B29C 45/32 (2006.01); B29C 45/33 (2006.01)
CPC B29C 45/32 (2013.01) [B29C 45/1675 (2013.01); B29C 45/2602 (2013.01); B29C 45/33 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A mold device comprising:
a primary mold including a cavity mold and a primary core mold, the primary mold being 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; and
a secondary mold including the cavity mold and a secondary core mold, the secondary mold being 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 being formed by clamping the cavity mold and the secondary core mold, the cavity mold being configured to hold the primary molded product,
wherein 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 protruding into the first cavity locks an end surface of the primary molded product to hold the primary molded product in the cavity mold, and
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.