Counter-pressure molding of urethane foam

Details Counter-pressure molding of urethane foam Counter-pressure molding of urethane foam

B - Operations, Transporting

60

R

B60R 13/02 (2006.01) B29C 44/10 (2006.01) B29C 44/12 (2006.01) B29C 44/58 (2006.01) B29C 70/00 (2006.01)

Patent

CA 2389872

A method for manufacturing a vehicle trim panel with a urethane foam using a counter or positive pressure to eliminate void defects inherent in the molding of urethane foams. During molding of the trim panel, a positive pressure is applied to the outer layer that forms the exterior or viewable surface of the trim panel to counteract the migration of air bubbles to the top surface of the urethane foam forming the core of the trim panel.

La présente invention concerne un procédé de fabrication d'un panneau de garnissage pour véhicule en mousse d'uréthane selon lequel on utilise une contre-pression ou une pression positive pour éliminer les poches d'air inhérentes au moulage des mousses d'uréthane. Au cours du moulage du panneau de garnissage, on applique une pression positive sur la couche extérieure qui forme la surface extérieure ou visible du panneau de garnissage pour contrecarrer la migration des bulles d'air vers la surface supérieure de la mousse d'uréthane qui forme le noyau du panneau de garnissage.

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