Three-dimensional printer with cooled protective sheet separator
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United States of America Patent
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Aug 21, 2018
Grant Date -
Mar 24, 2016
app pub date -
May 9, 2014
filing date -
May 13, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A three-dimensional printer (100) having a means for cooling (124) the uppermost surface of a material bed in a region immediately before a deposited layer of material (e.g. powder) at the uppermost surface is separated from a protective sheet (116). The protective sheet (116) provides a physical barrier between the deposited layer of material and a thermal print head (114) during printing. The separation of the protective sheet from the material bed may occur to create a distribution gap for a new layer of powder to be deposited (118). The cooling means may facilitate separation of the protective sheet from the deposited layer, and especially from the portion of that layer that has been heat-treated in the preceding printing pass. The cooling means may be an actively cooled surface on a separator that formed part of the print head.
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