Additive Manufacturing Methods for Improved Curl Control and Sidewall Quality
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United States of America Patent
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Issued Date -
May 31, 2012
app pub date -
Nov 29, 2010
filing date -
Nov 29, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
There is provided methods and apparatus for improving the accuracy of three-dimensional objects formed by additive manufacturing. By depositing or hardening build material within the interior of the layers in certain patterns, the stresses that lead to curl in the object can be isolated and controlled. Similarly, certain patterns for depositing or hardening the build material provide for reduced layer thicknesses to improve the sidewall quality of the object being formed. The patterns within the interior of the layers can include gaps or voids for particular layers being deposited or hardened, and the gaps or voids can be partially filled, fully filled, or not filled at all when subsequent layers are deposited or hardened. Accordingly, the accuracy of three-dimensional objects formed by additive manufacturing is improved.
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