Polymer additive layer manufacturing
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United States of America Patent
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Nov 29, 2016
Grant Date -
Jul 17, 2014
app pub date -
May 9, 2012
filing date -
May 20, 2011
priority date (Note) -
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Abstract
An additive layer manufacturing method for producing a shaped article, comprising providing a powdered thermoplastic polymer material (7, 8) having a re-solidification temperature at most 10% below its melting temperature on the Celsius scale, depositing successive layers of the powdered polymer material (7, 8) and selectively sintering each layer prior to deposition of the subsequent layer so as to form the article, wherein during its production the article is maintained at a temperature above the glass transition temperature and significantly below the re-solidification temperature of the polymer.
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