Method for producing a container provided with a container...

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 49/76 (2006.01) B29C 47/44 (2006.01) B29C 49/58 (2006.01)

Patent

CA 2587071

The invention relates to a method for producing a container, which is provided with a container opening and which has an, in essence, dimensionally stable outer layer and at least one internal layer made of thermoplastic materials of a different kind. Firstly, a parison consisting of at least two coaxial molten polymer tubes (2, 3), which have sufficient lengths for producing the container, is created between the closed separate parts of a blow mold (4) during a blowing process. A rigid blowing mandrel (5) with a balloon (6) placed thereon is guided through the mold and into the parison, whereupon the balloon (6) is inflated in the area of the container opening whereby pressing the at least two layers against the blow mold (4) where they then solidify. Finally, the pressure is directed through the blowing mandrel (5) and inside the parison.

L'invention concerne un procédé de production d'un contenant pourvu d'une ouverture, ce contenant comprenant une couche extérieure sensiblement indéformable et au moins une couche intérieure constituées de matières thermoplastiques différentes. Ce procédé consiste à produire une paraison à partir d'au moins deux tubes polymères coaxiaux (2, 3) à l'état fondu, ces tubes présentant des longueurs suffisantes pour produire le contenant, par un procédé de soufflage entre les parties fermées d'un moule de soufflage (4). Un mandrin de soufflage (5) rigide sur lequel est appliqué un ballon (6) est ensuite guidé à l'intérieur de la paraison à travers le moule, puis le ballon (6) est gonflé au niveau de l'ouverture du contenant de sorte que les couches soient plaquées contre le moule de soufflage (4) et se solidifient à cet endroit. La dernière étape consiste à appliquer une pression à l'intérieur de la paraison à travers le mandrin de soufflage (5).

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