Insert element for cavity sealing

B - Operations – Transporting – 60 – R

Patent

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Details

B60R 13/08 (2006.01) B62D 29/00 (2006.01) C08J 9/10 (2006.01)

Patent

CA 2410621

An insert element (8) for sealing cavities (6, 7) in vehicle body carriers (4) has sealing means constituted by a foamable material (11) which is secured in the cavities (6, 7) by securing means (9). The insert element (8) comprises a foamable material (11) and a support structure (10) which comprises a frame (13) and an inner part (14) for carrying the foamable material (11). The frame (13) has at least two lateral and not immediately oppositely arranged support faces (12), and carries securing means (9). With this arrangement, the foamable material can completely engulf the securing means (9) with foam during the foaming process and can flow into apertures of an intermediate metal sheet (5) foreseen for receiving the securing means (9). This ensures that these apertures are impermeably sealed against air and noise during the foaming process. The foamable material is preferably constituted of a thermoplastic polymer which can form a closed-celled foam, thus increasing the noise insulating and noise absorbing properties, whilst also acting as a moisture barrier and an airtight sealant.

L'invention concerne un élément d'insertion (8) permettant de sceller des cavités (6, 7) dans des supports de corps (4) de véhicules et possédant un dispositif d'étanchéité constitué d'une matière expansible (11) qui est fixée dans les cavités (6, 7) au moyen d'un dispositif de fixation (9). L'élément d'insertion (8) comprend une matière expansible (11) et une structure de support (10) dotée d'un cadre (13) et d'une partie interne (14) servant à soutenir ladite matière (11). Le cadre (13) présente au moins deux surfaces de support (12) latérales qui ne sont pas situées complètement à l'opposé, et soutient un dispositif de fixation (9). A l'aide de cette disposition, ladite matière peut envelopper complètement le dispositif de fixation (9) avec de la mousse pendant le processus de moussage et peut s'écouler dans des ouvertures d'une feuille métallique intermédiaire (5) destinée à recevoir le dispositif de fixation (9). Ceci permet de garantir que ces ouvertures sont hermétiques pendant le processus de moussage. La matière expansible est, de préférence, constituée d'un polymère thermoplastique qui peut former une mousse à cellules fermées, ce qui accroît les propriétés d'absorption sonore et d'insonorisation, tandis que la matière agit comme une membrane étanche et un produit d'étanchéité.

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