Fiber aggregate molding method

B - Operations – Transporting – 68 – G

Patent

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Details

B68G 7/06 (2006.01) B29C 39/04 (2006.01) B29C 39/24 (2006.01) D04H 1/02 (2006.01) D04H 1/54 (2006.01) D04H 1/62 (2006.01)

Patent

CA 2244731

This invention provides a method for producing a cushion structure having excellent quality in a short time by the final heat-molding of a fiber aggregate containing binder fibers by compression molding a fiber aggregate in multiple stages leaving the thermal shrinkage margin, passing hot gas through a by-pass channel on the side wall part of the molded article to eliminate the problem of insufficient heating of the side face of the molded article and detecting the completion of the filling of the fiber aggregate into the mold cavity by the pressure variation in the mold cavity.

La présente invention concerne un procédé permettant de fabriquer rapidement une structure de coussin de haute qualité. Selon ce procédé, lors de l'étape finale du moulage thermique d'assemblages de fibres contenant un liant et la transformation ultérieure de ces assemblages en structure de coussin, le moulage est effectué par une compression en plusieurs étapes desdits assemblages, compte tenu d'une marge de retrait par refroidissement, et un passage de dérivation est aménagé, lequel est destiné à laisser passer un vent chaud sur une partie de la face latérale du produit moulé afin d'éviter un déficit de chaleur sur cette même partie de surface latérale, une variation de la pression dans la cavité du moule métallique indiquant que le remplissage de ladite cavité par les assemblages de fibres est terminé.

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