B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 45/16 (2006.01) B29C 45/26 (2006.01) B29C 45/73 (2006.01)
Patent
CA 2380088
By managing a coating material injection time and the like parameters so that they may be controlled within specifically determined ranges, an in-mold coating formation method is provided for manufacturing a molded product coated with a coating layer having a uniform quality in its outside appearance. By continuously and unifyingly managing a mold opening amount and a mold closing force, an in-mold coating formation method and an in-mold coating formation apparatus are provided which are so formed that, if the control of a mold closing force and the control of a mold opening amount are continuously changed and at the same time a high precision and a high response are maintained, it is possible to enlarge a selectable range for selecting a molding condition, thereby producing an integrally formed molded product having an excellent outside appearance and whose coating layer has a high adhesion strength. Further, there are provided a mold having a specifically formed auxiliary cavity and an in-mold coating formation method which employs said mold, so that it is possible to prevent a coating material from leaking out of the mold, thereby shortening the molding formation cycle, and making it possible to manufacture a molded product having a stabilized quality. Moreover, by controlling an internal pressure in the mold cavity under a predetermined condition after the injection of the coating material, there is provided a further in-mold coating formation method which makes it possible to obtain an integrally formed molded product whose coating layer has a sufficient strength with the molded product, without having to use a special coating material and a special resin to be used for molding. In addition, by using a mold having a specifically shaped sub-cavity, there is provided a still further in-mold coating formation method which can keep mold temperature at a relatively low value, cause the coating material to cure at a predetermined temperature and within a predetermined time period, thereby shortening the molding formation cycle, improving the productivity, improving the physical properties of a coating layer, thus obtaining a good molded product.
L'invention porte sur un procédé et un dispositif de formation d'un revêtement sur les surfaces internes d'un moule métallique. Ce procédé permet, après obtention d'un produit constitué de résine thermoplastique, de former un corps constitué d'un film appliqué sur les surfaces du moule métallique en desserrant le moule métallique, en le remplissant de peinture et en le resserrant. Ce procédé se caractérise par la détermination d'un temps de démarrage du remplissage, d'un temps de remplissage et d'un temps écoulé jusqu'au resserrage du moule. L'invention porte également sur un moule métallique doté d'une cavité auxiliaire et destiné à être utilisé dans le procédé et le dispositif précités.
Arai Toshio
Kobayashi Kazuaki
Okahara Etsuo
Oota Kenji
Yamamoto Yoshiaki
Dai Nippon Toryo Co. Ltd.
Marks & Clerk
Ube Industries Ltd.
Ube Machinery Corporation Ltd.
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