Molded panels with integrally molded open cell grids

Details Molded panels with integrally molded open cell grids Molded panels with integrally molded open cell grids

D - Textiles, Paper

21

J

D21J 3/00 (2006.01) D21J 3/12 (2006.01)

Patent

CA 2238350

Stressed-skin panels (20) are provided having internal open-cell grids (22) molded from material such as fibers, and methods and apparatus for the production thereof are disclosed. The invention utilizes a porous screen (10, 14) having a plurality of elastomeric pads (12) spaced apart thereon. Fiber dispersed in fluid is introduced into the apparatus and over and around the pads. Pressure exerted thereon expels fluid through the screen (10, 14) and consolidates the fibers to form a panel (20). The pads (12) are designed and constructed in a manner so as to consolidate the fiber mat located below the pads compressed by the pressure (24), so that the finished panel includes integrally-molded flange (24). The height, shape and/or spacing of the pads in the present invention advantageously provide improved mold release and greater resistance to compression set after repeated use. The pads provide greater consistency and improved quality in the flange formation on the panels.

Panneaux à revêtement travaillant (20) comportant des réseaux de cellules ouvertes intérieures, moulés dans des matériaux tels que fibres, et procédés et appareils permettant leur fabrication. On utilise un filtre poreux (10, 14) sur lequel se trouvent une pluralité de blocs d'élastomère (12) espacés. Des fibres dispersées dans un fluide sont introduites dans l'appareil, ainsi que sur les blocs et autour. La pression exercé sur les panneaux chasse le fluide, qui traverse le filtre (10, 14), ce qui solidifie les fibres et forme un panneau (20). Les blocs (12) sont conçus et fabriqués de telle façon qu'ils solidifient la nappe de fibres situé sous les blocs et comprimé par la pression (24), de sorte que le panneau fini comprend un rebord moulé de façon solidaire (24). La hauteur, la forme et/ou l'espacement des blocs selon l'invention assurent de façon avantageuse le démoulage et une grande résistance à la compression après un usage répété. Les blocs assurent une grande régularité et une qualité améliorée dans la formation de rebords sur les panneaux.

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