Apparatus for rapidly producing shaped articles, e.g. of ceramic, by laser-induced sintering and/or fusion of particles, includes particle transporting annular doctor blade with particle compressing roller

摘要

In apparatus for rapid production of shaped articles (1), comprising at lesat one article construction chamber (2) with an article support (5), a reservoir for particles (3), a driven annular doctor blade (6) for transporting particles from the reservoir to the chamber and a laser (4) for sintering and/or fusing the particles, at least one rotatably mounted roller is located in the annular doctor blade to compress the particles. The parent patent, , describes apparatus for rapid production of shaped articles (1), comprising at least one article construction chamber (2) with an article support (5), a reservoir for particles (3), a driven doctor blade (6) for transporting particles from the reservoir to the chamber and a laser (4). The laser beam is guided over the cross-sectional surface of the chamber and contacts the particle layer so that the particles (and any underlying layer(s)) are sintered and/or fused together. In this patent of addition, at least one rotatably mounted roller is located in the annular doctor blade to compress the particles.