Preforming thermoplastic ducts

B - Operations – Transporting – 29 – B

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B29B 11/00 (2006.01) B29C 51/00 (2006.01) B29C 53/00 (2006.01) B29C 53/04 (2006.01) B29C 53/36 (2006.01) B64D 13/00 (2006.01) F16L 9/22 (2006.01) F24F 13/02 (2006.01)

Patent

CA 2435027

There are provided apparatuses and related methods for preforming sheets to form preforms for forming ducts. The preforms can be formed of a thermoplastic material, such as flat sheets of reinforced thermoplastic, which can be lightweight, strong, and perform well in flammability, smoke, and toxicity tests. The apparatus includes a heater for heating the sheet to a processing temperature and a structure for configuring the sheet to a desired shape of the duct. For example, rollers, rods, tubes, or a funnel can be used to bend the sheet.

On présente des appareils et des procédés connexes de préformage de feuilles pour créer des préformes destinées à former des conduites. Les préformes peuvent être formées à partir d'un matériau thermoplastique, tel que des feuilles plates de thermoplastique renforcé, qui peut être de poids léger, solide et à bon rendement dans les tests d'inflammabilité, de fumée et de toxicité. L'appareil comprend un dispositif de chauffage pour chauffer la feuille à une température de traitement et une structure pour configurer la feuille à une forme souhaitée de la conduite. Par exemple, on peut utiliser des rouleaux, des tiges, des tubes ou un entonnoir pour plier la feuille.

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