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Method for producing a three-dimensional object by means of laser sintering

A technology for three-dimensional objects and objects, which is applied in the direction of processing and manufacturing, solid material additive processing, additive processing, etc., can solve problems such as the inability to eliminate layer coating defects in a targeted manner, and the impossibility of accurate identification

Active Publication Date: 2010-03-24
EOS ELECTRO OPTICAL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is not possible to accurately identify areas with missing layer coatings, so that targeted elimination of defects in layer coatings is not possible

Method used

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  • Method for producing a three-dimensional object by means of laser sintering
  • Method for producing a three-dimensional object by means of laser sintering
  • Method for producing a three-dimensional object by means of laser sintering

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Embodiment Construction

[0017] as from figure 1 As can be seen most clearly, the laser sintering device according to the invention has an upwardly and downwardly open structural frame 1 with an upper edge 2 . A structural platform 3 is arranged in the structural frame, and the structural platform is connected with a vertical transmission device 4, through which the structural platform can move up and down in the vertical direction. A hardening device in the form of a laser 6 and a beam deflection system 7 is arranged above the upper edge 2 . Furthermore, there is an applicator 8 for applying powdery material. The applicator comprises, for example, a container extending transversely over the processing area, which can be filled with a reserve powder and has a discharge opening 5 extending transversely over the processing area on its bottom face. Furthermore, the spreader usually has at least one blade 8 a for producing a powder layer with a predetermined thickness. The laser 6 , the beam deflectio...

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Abstract

A method of manufacturing three-dimensional objects by laser sintering is provided, the object is formed by solidifying powder material layer by layer at locations in each layer corresponding to the object by means of laser radiation, wherein an IR-radiation image in an applied powder layer is detected, characterized in that defects and / or geometrical irregularities in the applied powder layer are determined on the basis of the IR-radiation image.

Description

technical field [0001] The invention relates to a method for producing three-dimensional objects by means of laser sintering. Background technique [0002] A method for producing three-dimensional objects by means of laser sintering is known, for example, from EP 1 466 718 A2. An infrared camera is used there to detect the instantaneous temperature of the uppermost powder layer. The temperature images taken are used to readjust the radiant heating system via the temperature control system. Undesirable shrinkage can thus be reduced by controlling the temperature in the uppermost layer of the partially stratified bed. [0003] EP 1 296 788 B1 discloses a method for producing a three-dimensional object by melting powdered material layer by layer at the locations of the individual layers corresponding to the object by means of an electron gun. Cameras are used to detect the surface properties of the surface layer in the powder bed (Pulverbett), which locally measure the tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C67/00
CPCB29C67/0077B29C64/153B33Y10/00B33Y30/00
Inventor J·菲利皮T·马特斯
Owner EOS ELECTRO OPTICAL SYST
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