公开(公告)号：EP2231352A4

公开(公告)日：2013-03-27

申请号：EP08705182

申请日：2008-01-03

Applicant: ARCAM AB

Inventor： JONASSON DANIEL ,  LARSSON MORGAN ,  ACKELID ULF ,  SNIS ANDERS ,  LOCK TOMAS

IPC: B22F3/105 ,  B29C67/00

CPC classification number: B29C64/20 ,  B22F3/1055 ,  B22F2003/1056 ,  B22F2003/1057 ,  B22F2999/00 ,  B29C64/153 ,  B29C64/386 ,  B29C64/393 ,  B29C67/0085 ,  B29L2009/00 ,  B33Y30/00 ,  Y02P10/295 ,  B22F2203/03

Abstract: The invention concerns a method 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, which method comprises the following steps: successive application of powder layers to a working area (5), and fusing together successive layers of said three-dimensional object (6) by successively irradiating the powdery layers with said beam (4). The invention is characterized in that it comprises the following steps: determining whether lifting of powdery material from the working area (5) occurs using a powder-lifting detection device (10, 10a, 10b, 10c, 1Od, 1Oe) capable of generating a signal (S) upon detection of lifting of powdery material from the working area (5), and interrupting the irradiation of at least a part of the working area (5) where powder lifting occurs using the signal (S) generated by the powder-lifting detection device (10, 10a, 10b, 10c, 10d, 1Oe) for automatically trigging the interruption. The invention also 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).