An apparatus for building a three-dimensional article and a...

B - Operations – Transporting – 29 – C

Patent

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B29C 67/00 (2006.01)

Patent

CA 2622617

The invention provides an apparatus for building a three-dimensional article in sequential cross-sectional layers, which apparatus comprises: a powder delivery system comprising one or more reservoirs for delivering a powder (2) and a powder spreading system (16); a printing system (26) for delivering a liquid; a build chamber (1) comprising an outer wall (5), an inner wall (8) and a build platform (10) which is movable along the inner wall of the build chamber; and a powder recovery system; wherein the building chamber comprises a space defined by the upper portion between the inner wall and the outer wall of the building chamber and this space is in communication with the powder recovery system and/or the build platform is capable of releasing unused powder (directly) from the build chamber in a downward direction into the powder recovery system. The invention further provides a method building a three-dimensional article wherein use is made of said apparatus.

La présente invention concerne un appareil destiné à la fabrication d~un article tridimensionnel en couches présentant une section transversale séquentielle, lequel appareil comprend : un système de distribution de poudre ayant au moins un réservoir destiné à fournir une poudre (2) et un système d~étalement de poudre (16) ; un système d~impression (26) diffusant un liquide ; une chambre de formation (1) ayant une paroi externe (5), une paroi interne (8) et une plate-forme de formation (10) qui est mobile le long de la paroi interne de la chambre ; et un système de récupération de poudre. La chambre de formation comprend un espace déterminé par la partie supérieure se situant entre la paroi interne et celle externe de la chambre, ledit espace communiquant avec le système de récupération de poudre et/ou la plate-forme de formation et permettant de libérer la poudre inutilisée (directement) de la chambre de formation vers le bas en direction du système de récupération. La présente invention concerne également un procédé de fabrication de l~article tridimensionnel, ce procédé utilisant l~appareil décrit.

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