Multi-layered blown film forming apparatus and multi-layered...

B - Operations – Transporting – 29 – C

Patent

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B29C 55/28 (2006.01)

Patent

CA 2536367

A multi-layered blown film forming apparatus contains an adapter provided to supply a multiple types of resins, a forming die provided on a downstream side in an axial direction of the adapter, and a temperature controller mechanism. Molten resins of multiple types are individually fed to the forming die through the adapter. The forming die contains a main body, a multi-layer structure of a plurality of single-layer thin film dies disposed in an inner portion of the main body in an axial direction to produce a plurality of resin thin films corresponding to the molten resins of the multiple types, and a first annular path formed between main body and the multi-layer structure. A multi-layered thin film in which the plurality of resin thin films are overlaid is passed through the first annular path and is outputted as a multi-layered thin annular film. The temperature controller mechanism controls individual temperatures of the plurality of single-layer thin film forming dies independently.

L'invention concerne une machine à mouler une feuille soufflée multi-couche. Cette machine comprend un adaptateur permettant de délivrer de multiples types de résines, un moule installé sur la face axialement en aval de l'adaptateur, et un mécanisme de contrôle de température. Les multiples types de résines fondues sont individuellement cédés au moule par l'adaptateur. Le moule comprend également un corps, un laminat d'une pluralité de moules de minces feuilles monocouches axialement disposés dans le corps et générant la mince feuille de la résine correspondante, parmi les multiples types de résines fondues, et un premier passage annulaire formé entre le corps et le laminat. Une mince feuille multi-couche, constituée de la pluralité de minces feuilles laminées l'une sur l'autre, sort sous la forme d'une feuille annulaire multicouche à minces feuilles du premier passage annulaire, et le mécanisme de commande de température commande indépendamment les températures de la pluralité des moules de minces feuilles mono-couches.

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