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Three-dimensional printing of three-dimensional objects

  • US 10,369,629 B2
  • Filed: 03/01/2018
  • Issued: 08/06/2019
  • Est. Priority Date: 03/02/2017
  • Status: Active Grant
First Claim
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1. A three-dimensional object, comprising:

  • a plurality of layers of solid material that are bonded together to form a shape of the three-dimensional object, wherein the plurality of layers comprises;

    an interior portion of the three-dimensional object; and

    a skin portion that (a) is bonded with the interior portion and (b) comprises a second plurality of layers, wherein;

    (i) an exterior surface of the skin portion corresponds to at least a fraction of an exterior surface of the three-dimensional object,(ii) the exterior surface of the skin portion comprises a micro-texture of two-dimensional array of periodic peaks and valleys, wherein the exterior surface of the skin portion (1) has an arithmetic average of a roughness profile (Ra) value of at most about 30 micrometers and (2) is devoid of polishing marks, and(iii) (I) the interior portion has a first grain structure and the skin portion has a second grain structure that is different than the first grain structure and/or (II) the interior portion comprises a first plurality of grains and the skin portion comprises a second plurality of grains, and wherein the second plurality of grains are aligned differently than the first plurality of grains.

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