F - Mech Eng,Light,Heat,Weapons – 16 – D
Patent
F - Mech Eng,Light,Heat,Weapons
16
D
F16D 3/84 (2006.01) B29C 45/03 (2006.01) B29C 45/14 (2006.01) F16J 3/04 (2006.01) F16J 15/52 (2006.01)
Patent
CA 2477520
There is disclosed a boot for a constant-velocity universal joint, in which a secondary molded portion including a thick portion is formed in a large-diameter side end portion of a primary molded member, and the boot is easily pulled out of a core mold. The boot is downsized and lightened to reduce costs. A manufacturing method includes: a step of forming a secondary molding space 43 between an inner peripheral surface of a large-diameter side end portion 3 of the primary molded member and an outer peripheral surface of a core mold 69; a step of injecting a molten material into the secondary molding space to mold the secondary molded portion; and a step of integrally molding a secondary molded member on the inner peripheral surface of the large-diameter side end portion of the primary molded member to form a boot 1, moving a removable portion 83 of a second mold section 79 of the core mold 69 which abuts on at least the end portion of the thick portion in the vicinity of the bellows portion in a central axial direction of the core mold to remove the removable portion from an undercut portion 17a of a thick portion 17 just before separating the boot from the core mold, and separating the core mold 69 from the boot 1 in this state.
Sueoka Kazuhiko
Takada Yasuji
Fukoku Co. Ltd.
Kirby Eades Gale Baker
LandOfFree
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