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Color three dimensional printing

  • US 9,169,968 B2
  • Filed: 06/10/2013
  • Issued: 10/27/2015
  • Est. Priority Date: 06/08/2012
  • Status: Active Grant
First Claim
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1. An extruder for use in an additive manufacturing system, the extruder comprising:

  • a first port to receive a first filament of a first build material having a first color;

    a second port to receive a second filament of a second build material having a second color;

    an extrusion port; and

    a cavity coupled in fluid communication with the first port, the second port, and the extrusion port, the cavity including one or more baffles to mix the first build material with the second build material while passing in a liquid state to the extrusion port, thereby producing a build material, wherein the baffles include one or more torsion inducing elements to alter flow of build material through the cavity and promote mixing.

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