System and method for fastening insulating layer to sheet...

B - Operations – Transporting – 60 – R

Patent

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Details

B60R 13/08 (2006.01) B65C 7/00 (2006.01) B68G 7/08 (2006.01) B68G 7/12 (2006.01)

Patent

CA 2259953

A dash mat assembly (10) for installation in a vehicle includes an acoustic barrier layer (12) attached to an absorber layer (14). The acoustic barrier layer (12) is formed of relatively stiff material while the absorber layer (14) is formed of relatively flexible material. The inner surface of the acoustic barrier layer (12) is in direct contact with the outer surface of the absorber layer. Fasteners (16) are provided for attaching the layers together. Each fastener has an elongate pin (22) with opposite ends and a flexible holding flange (24, 26) integrally molded at each end of the pin (22). The flanges (24, 26) normally extend generally transverse to a central axis of the pin and the length of each flange is greater than a cross-sectional dimension of the pin. The fasteners (16) extend completely through the acoustic barrier layer (12) and can extend either partially or completely through the absorber layer (14). The length of the pin (22) is shorter than the combined thickness of the layers such that the layers are held together under compression. A method of attaching the layers together is also disclosed.

Ensemble mat (10) se plaçant à l'arrière d'un tableau de bord, destiné à être installé dans un véhicule et comprenant une couche antibruit (12) fixée à une couche absorbante (14). La couche antibruit (12) est composée d'un matériau relativement rigide tandis que la couche absorbante (14) est composée d'un matériau relativement souple. La surface interne de la couche antibruit (12) est en contact direct avec la surface externe de la couche absorbante. Des éléments de fixation (16) sont prévus pour fixer les couches ensemble. Chaque élément de fixation comprend une cheville allongée (22) dotée d'extrémités opposées et d'une collerette de retenue souple (24, 26), moulée en une seule pièce avec la cheville (22), à chacune de ses extrémités. Les collerettes (24, 26) s'étendent généralement de manière transversale par rapport à un axe central de la cheville et la longueur de chaque collerette est supérieure à la dimension de section de la cheville. Les dispositifs de fixation (16) traversent entièrement la couche antibruit (12) et peuvent s'étendre partiellement ou entièrement à travers la couche absorbante (14). La longueur de la cheville (22) est inférieure aux épaisseurs combinées des couches, de sorte que celles-ci soient maintenues ensemble sous compression. Un procédé de fixation des couches est également décrit.

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