Powder distribution in additive manufacturing of three-dimensional articles
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United States of America Patent
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Nov 29, 2016
Grant Date -
Mar 12, 2015
app pub date -
Apr 15, 2014
filing date -
Sep 6, 2013
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Abstract
The present invention relates to a method for forming a three-dimensional article through successive fusion of parts of at least one layer of a powder bed provided on a work table. Said method comprising the steps of: providing at least a first and second powder tank, providing a first type of powder in said first powder tank having a first particle size distribution, providing a second type of powder in said second powder tank having a second particle size distribution, providing a first sub-layer of said first type of powder on said work table, providing a second sub-layer of said second type of powder on top of said first layer of said first type of powder, fusing said first and second sub-layers simultaneously with a high energy beam from a high energy beam source for forming a first cross section of said three-dimensional article.
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