Coating in multiple injection molding part cavities

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 45/16 (2006.01)

Patent

CA 2520185

A molding apparatus includes a mold (12, 14) defining a plurality of mold cavities (34, 36). Fluidly connected to the mold cavities (34, 36) are one or more first composition injectors (30) via a sprue passageway (38) and one or more second composition injectors (32) via injector passageway (62) for delivery of, respectively, the molten material from which the molded article is to be formed and a composition to coat the article so formed. A runner section (40) is fluidly connected to said sprue passageway (38) and said plurality of mold cavities (34, 36). The second injector passageway (62) is fluidly connected to the runner sectoin (40) at an intersection (68).

La présente invention concerne un appareil de moulage qui comprend un moule (12, 14) définissant une pluralité de cavités de moule (34, 36). Les cavités de moule (34, 36) se trouvent en connexion fluidique avec un ou plusieurs injecteurs d'une première composition (30) via un passage de carotte (38), et avec un ou plusieurs injecteurs d'une seconde composition (32) via un passage d'injecteur (62), lesquels injecteurs permettent la distribution, respectivement, de la matière fondue dans laquelle l'article moulé sera réalisé et d'une composition destinée à revêtir l'article formé. Une section canal secondaire d'injection (40) se trouve en connexion fluidique avec le passage de carotte précité (38) et la pluralité de cavités de moule (34, 36). Le second passage d'injecteur (62) se trouve en connexion fluidique avec la section canal secondaire d'injection (40) à une intersection (68).

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