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:
Jul. 29, 2003
Filed:
Feb. 20, 2001
Jialin Shen, Blaubeuren, DE;
Jürgen Steinberger, Gröbenzell, DE;
DaimlerChrysler AG, , DE;
Abstract
A device and process for sintering a powder with a laser beam, and in particular, a rapid prototyping process involving selective laser sintering (SLS), with reduction in non-homogeneities, i.e., grooves or hollows due to complete melting of powder or poor material characteristics due to insufficient melting of powder. The problem is solved by a process and a device for homogenization of the temperature distribution in the part during its manufacture. For this, the temperature of the sinter powder is detected in the sinter point and the power of the laser is controlled depending upon the detected temperature. Geometric changes of the moveable detection area, as well as the changes in the chromatic adjustment, and beam correcting errors, all of which occur depending upon the position of the detection area on the upper surface of the powder bed, are taken into consideration. Thereby a more realistic determination of the temperature values is made possible from the measured temperature values.