Machine and method for forming molded foam cushions

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 44/16 (2006.01) B29C 44/18 (2006.01)

Patent

CA 2403801

A machine for forming molded foam cushions (48), including an apparatus for enclosing a foamable composition in a flexible bag (16); a mold (40) having a cavity and a closure mechanism and being movable between an open position and a closed position such that, when in the closed position, the closure mechanism and the cavity define an enclosed three-dimensional shape, the mold comprising a material capable of transferring sufficient heat to or from the cavity to maintain the cavity at a desired temperature; a device for controlling the temperature of the mold cavity; means for placing the bag in the mold cavity while the mold is in the open position, whereby, when the mold assumes the closed position, the foamable composition expands (14) within the cavity to form a foam cushion that substantially conforms to the three- dimensional shape; and means for pulling the foam cushion from the mold cavity.

Cette invention a trait à une machine destinée à la fabrication de coussins moulés en mousse (48), laquelle machine comporte un dispositif enfermant une composition susceptible de mousser dans une poche souple (16), un moule (40), à cavité et à mécanisme de fermeture pouvant se déplacer d'une position ouverte à une position fermé, de sorte que, en position fermée, le mécanisme de fermeture et la cavité définissent un espace tridimensionnel. Le moule contient un matériau capable de transférer suffisamment de chaleur vers la cavité ou émanant de celle-ci afin de maintenir celle-ci à la température souhaitée. La machine est également pourvue d'un dispositif de régulation de la température de la cavité du moule ainsi que de moyens permettant de placer la poche dans la cavité du moule lorsque celui-ci est ouvert. De ce fait, lorsque le moule est fermé, la composition susceptible de mousser entre en expansion et forme un coussin en mousse épousant la forme de l'espace tridimensionnel. La machine est également équipée d'un mécanisme destiné à extraire le coussin en mousse de la cavité du moule.

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