Device and method for applying layers of a powder material onto a surface

A technology of powder material and material conveying device, which is applied in the direction of solid material additive processing, additive processing, and process efficiency improvement, etc., can solve the problems of non-reuse, thermal damage, etc., and achieve the effect of small thermal load

Active Publication Date: 2007-12-19
EOS ELECTRO OPTICAL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case, depending on the material, especially when using polymers, the material accumulated in the edge reg

Method used

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  • Device and method for applying layers of a powder material onto a surface
  • Device and method for applying layers of a powder material onto a surface
  • Device and method for applying layers of a powder material onto a surface

Examples

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Example Embodiment

[0018] Figure 1 shows a laser sintering apparatus as an embodiment of an apparatus for producing a three-dimensional object in which the apparatus and method of the present invention are employed. The laser sintering apparatus has a container 1 which is open towards the top. Inside the container 1 is arranged a support 2 for supporting the object 3 to be formed. The support 2 can be moved up and down in the vertical direction 1 within the container 1 by means of a drive device 4 . The upper edge of the container 1 defines a working plane 5 (production area). Arranged above the working plane 5 is an irradiation device 6 in the form of a laser, which emits a directed laser beam, which is deflected onto the working plane 5 by means of a deflection device 7 . Next, an applicator 8 is provided for applying the powder material to be cured on the surface of the support 2 or on a recently cured layer. The applicator 8 can be moved back and forth between two end positions above the ...

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PUM

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Abstract

A method for applying powder onto a substrate, e.g. to produce three dimensional items secured by laser sintering, has a reciprocating scraper (8) to move excess powder to collecting systems (11) each side of the substrate holder. The item is built up in layers and the collected powder is recycled to the other side of the scraper while the dosing rate is adjusted to ensure an even coating. The powder is pre-warmed during dosing and is subsequently heated to the process temperature. The recycling means comprise two rotating cylinders rotating in opposite directions.

Description

technical field [0001] The invention relates to a method according to the preamble of claim 1 or 12 for applying a layer of powder material to a surface, and a device according to the preamble of claim 19 for producing such a three-dimensional object. Background technique [0002] Such a device and a method for applying layers of powder material are known, for example, from DE 195 14 740 C1. The coater for laser sintering devices described in DE19514740C1 has a single blade which moves the stored coating material ahead of itself during the coating process. The problem here is that the stock of coating material is either too small to apply a complete layer within the work area (build area), or the stock is greater than what is required for one layer so that excess material is removed from the work area. s material. This excess material can no longer be used to apply other coatings, so it must be collected in special collection containers and results in excessive material co...

Claims

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Application Information

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IPC IPC(8): B22F3/00B29C67/00B22F3/105
CPCB22F3/1055B29C67/0077B28B1/29B28B1/001B22F2003/1059B29C64/153B33Y30/00Y02P10/25B22F12/13B22F12/67B22F12/224B22F12/90B22F10/28B22F10/73B22F10/37B22F12/50Y02P10/20
Inventor H·佩雷特T·哈尔德J·菲利皮P·凯勒G·坎茨勒M·格特
Owner EOS ELECTRO OPTICAL SYST
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