Yazaki Corporation

Kazuhiko Hiraguchi

Kenji Takahashi

Takashi Masuda

Hiroshi Murashita

Norio Kawamura

Toshimi Nakashima

Junich Hamamoto

Junichi Hamamoto

A molding and tentatively retaining mold of the invention has a plurality of molds which are relatively movable with respect to a fixed mold, and molds a housing and rear holders and , which are respectively independent, in a plurality of cavities formed in cooperation with the fixed mold. When the rear holders and are relatively moved with respect to the housing by a pair of rear-holder tentatively retaining cylinders after molding, and are tentatively retained, the amount of movement of a pair of third movable molds is set to be greater by a predetermined amount than an amount of movement necessary for tentatively retaining the rear holders and , and the third movable molds after movement are stopped at the moved positions until a predetermined time elapses.

Molding and tentatively retaining mold and method of molding and tentative retention

A molding and tentatively retaining mold of the invention has a plurality of molds which are relatively movable with respect to a fixed mold, and molds a housing and rear holders and which are respectively independent, in a plurality of cavities formed in cooperation with the fixed mold. When rear holders and after molding are relatively moved with respect to a housing by movable molds and and are tentatively retained, a runner for a cavity for molding the housing is kept connected to the housing through a tunnel gate In addition, a portion of the fourth movable mold for forming the cavity in the housing is kept fitted to the housing as it was during molding.

In a production apparatus ( ), after rear holders ( ) and a housing body ( ) are molded by molding die cavities, slides ( ) are moved apart from the housing body ( ). Then, cylinders ( ) are driven to move the rear holders ( ), holders ( ) and the slides ( ) together with slide plates ( ), so that the rear holders ( ) are located in opposed relation to the housing body ( ). Then, cylinders ( ) are driven to move the rear holders ( ) toward the housing body ( ), thereby provisionally retaining the rear holders ( ) on the housing body ( ). Therefore, the amount of movement of the slides ( ) is small, and it is not necessary to provide any space for holding the slides ( ), moved into their respective stand-by positions, and therefore the small-size design of the production apparatus can be achieved, and also the production efficiency can be enhanced.

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Shizuoka, Japan

Kazuhiko Hiraguchi