METHOD AND APPARATUS FOR PRODUCING THREE-DIMENSIONAL OBJECTS

摘要

The invention concerns an apparatus (1) for producing three-dimensional objects (6) layer by layer using a powdery material which can be solidified by irradiating it with a beam (4) of charged particles, said apparatus (1) comprising means for successive application of powder layers to a work table, and a radiation gun (3) for delivering said beam (4) of charged particles, wherein the inventive apparatus (1) comprises a powder-lifting detection device (10, 10a, 10b, 10c, 10d, 10e) capable of generating a signal (S) upon detection of lifting of powdery material from the working area (5).

主权项

1. An apparatus for producing three-dimensional objects layer by layer using a powdery material which can be solidified by irradiating it with a beam of charged particles, said apparatus comprising:
a powder supply portion configured for successive application of one or more layers of a powdery material to a work table; a radiation gun configured for delivering said beam of charged particles and successively irradiating at least a part of the working area where the powdery material are applied, so as to fuse together successive layers of said three-dimensional object; and at least one powder-lifting detection device configured for:
generating a detection signal upon detection of lifting of at least a portion of said powdery material from the working area; andbased upon the generated detection signal, automatically interrupting the irradiation of at least a part of the working area where the powder lifting occurs.