Method and apparatus for producing parts by selective sintering

摘要: A method and apparatus (10) for selectively sintering a layer of powder to produce part comprising plurality sintered layers. The includes computer (40) controlling laser (12) direct the energy onto mass. either determines or is programmed with boundaries desired cross-sectional regions part. For each cross-section, aim beam scanned over switched on sinter only within cross-section. Powder applied successive layers until completed formed. may consist plastic, metal, ceramic, polymer substance. In preferred embodiment, directed in continuous raster scan turned when aimed particular cross-section being Preferably, dispensing mechanism drum which moved horizontally across target area counter-rotated smooth distribute an even area. downdraft system provides controlled temperature air flow through moderate during sintering.