The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 31, 2015
Filed:
Jan. 03, 2008
Daniel Jonasson, Göteborg, SE;
Morgan Larsson, Västra Frölunda, SE;
Ulf Ackelid, Göteborg, SE;
Anders Snis, Uddevalla, SE;
Tomas Lock, Göteborg, SE;
Daniel Jonasson, Göteborg, SE;
Morgan Larsson, Västra Frölunda, SE;
Ulf Ackelid, Göteborg, SE;
Anders Snis, Uddevalla, SE;
Tomas Lock, Göteborg, SE;
Arcam AB, Molndal, SE;
Abstract
The invention concerns a method 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, which method comprises the following steps: successive application of powder layers to a working area (), and fusing together successive layers of said three-dimensional object () by successively irradiating the powdery layers with said beam (). The invention is characterized in that it comprises the following steps: determining whether lifting of powdery material from the working area () occurs using a powder-lifting detection device (OO) capable of generating a signal (S) upon detection of lifting of powdery material from the working area (), and interrupting the irradiation of at least a part of the working area () where powder lifting occurs using the signal (S) generated by the powder-lifting detection device (O) for automatically trigging the interruption. The invention also concerns 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 means for successive application of powder layers to a work table, and a radiation gun () for delivering said beam () of charged particles, wherein the inventive apparatus () comprises a powder-lifting detection device () capable of generating a signal (S) upon detection of lifting of powdery material from the working area ().