Method and device for producing three-dimensional bodies

B - Operations – Transporting – 22 – F

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B22F 3/10 (2006.01) B22F 3/105 (2006.01) B23K 9/04 (2006.01) B23K 10/02 (2006.01) B29C 67/00 (2006.01) G05B 19/4099 (2006.01) H05B 3/60 (2006.01) H05B 7/20 (2006.01)

Patent

CA 2162561

Method to create three-dimensional bodies (30), for example models, formers, finished products, semi-finished products, among others, from a medium (12) consisting of particles, by producing a number of cross-sectional layers (25), each and every one representing a cross section of an object that has to be manufactured, whereby by means of an energy producing device (22a), which moves over the medium, the particles, in the just then topmost layer, in chosen areas, are connected at least with each other or with each other and with a preceding layer, in accordance with signals from a control unit (20). Particles that are not connected in respective layers are removed. The energy producing device (22a), which comprises at least one electrode (22b), forms one of the poles in a circuit, where the other pole is constituted of said medium (12), which is electrically conducting or semiconducting when these poles are connected to at least a voltage source (40), whereby energy waves are formed between said electrode and said medium (12), for example in form of at least an electric arc or heat, that connect the material particles of said medium by changing the physical characteristics of said particles in said chosen area (25).

Procédé de production de corps (30) en trois dimensions, tels que, entre autres, des maquettes, des gabarits, des produits finis et semi-finis, à partir d'un support (12) composé de particules et consistant à produire plusieurs couches (25) de section transversale représentant chacune une section d'un objet devant à fabriquer. Un dispositif (22a) produisant de l'énergie se déplace au-dessus du support de façon à relier les particules, dans des zones choisies de la couche se trouvant alors au sommet, au moins entre elles ou entre elles et à une couche précédente, en fonction de signaux provenant d'une unité de commande (20). Les particules qui ne sont pas reliées dans des couches respectives sont enlevées. Le dispositif (22a) produisant l'énergie, qui comprend au moins une électrode (22b), constitue l'un des pôles d'un circuit, tandis que l'autre pôle est constitué dudit support (12) qui est électroconducteur ou semi-conducteur lorsque ces pôles sont reliés à au moins une source de tension, de sorte que des ondes d'énergies sont formées entre l'électrode et le support (12), par exemple sous forme d'au moins un arc électrique ou de chaleur, ces ondes reliant les particules de matériau du support en modifiant leurs caractéristiques physiques dans la zone choisie (25).

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