Method and device for producing miniature objects or...

B - Operations – Transporting – 22 – F

Patent

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Details

B22F 3/105 (2006.01) B29C 67/00 (2006.01)

Patent

CA 2517374

The invention relates to methods and devices for producing miniature bodies or microstructured bodies on a support in a processing chamber in a vacuum or protective gas atmosphere, using laser beams of at least one laser that is placed inside or outside said chamber, whereby the laser beams are guided over the surface of the support that is provided with particles. The miniature bodies and the microstructured bodies are formed from particles that are applied in layers. Spacer bodies, which are likewise configured from particles that are applied in layers, are situated between the support and the miniature bodies. Said spacer bodies are produced by irradiation by the laser beams in such a way that particles are sintered in a partially planar, planar or linear manner on the corresponding plane to form small spacer bodies that have contact area structures and voids and can thus be destroyed and subsequently removed from the support and the miniature bodies or microstructured bodies. Spacer bodies are simultaneously formed with a static stability, allowing a secure positioning of the miniature bodies or microstructured bodies in relation to one another on the support and/or in the powder bed.

L'invention concerne un procédé et des dispositifs permettant de produire des corps miniatures ou corps microstructurés sur un support dans une chambre d'usinage par les faisceaux laser d'au moins un laser placé à l'intérieur ou à l'extérieur de la chambre d'usinage sous vide ou en présence d'un gaz protecteur. Les faisceaux laser sont guidés au-dessus de la surface du support par des particules. Les corps miniatures ou microstructurés sont constitués de particules appliquées par couches. Des distanceurs, situés entre le support et les corps miniatures ou microstructurés, sont également constitués de particules appliquées par couches. Ces distanceurs sont produits par exposition aux faisceaux laser de telle manière que les particules s'agglomèrent de manière partiellement plate, plate ou linéaire dans le plan concerné, ce qui permet d'obtenir des distanceurs qui présentent de petites structures à zones de contact et des vides et sont donc destructibles. Ainsi, les distanceurs peuvent être séparés du support et des corps miniatures ou microstructurés. Simultanément, les distanceurs se forment avec une solidité statique de telle manière que les corps miniatures ou corps microstructurés sont positionnés l'un contre l'autre de manière sûre sur le support et/ou dans le lit de poudre.

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