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Additive manufacturing process with dynamic heat flow control

  • US 10,086,564 B2
  • Filed: 10/04/2013
  • Issued: 10/02/2018
  • Est. Priority Date: 10/04/2013
  • Status: Active Grant
First Claim
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1. A method for printing a three-dimensional part with an additive manufacturing system, the method comprising:

  • feeding a consumable material to a liquefier tube retained by the additive manufacturing system at a first feed rate;

    heating the liquefier tube over multiple heating zones to heat the consumable material received in the liquefier tube to a target temperature such that the consumable material melts while preventing thermal degradation;

    feeding the consumable material to the liquefier tube at a second feed rate that is greater than the first feed rate;

    adjusting the heating of the liquefier tube over the multiple heating zones based at least in part of an increase of the feed rate of the consumable material to the second feed rate to the liquefier tube wherein an upper zone imparts heat to the consumable material at a temperature above a target temperature of the consumable material and a lower zone imparts heat at a lower temperature to a temperature below the target temperature such that the consumable material does not thermally degrade; and

    extruding the molten consumable material from a nozzle retained by the liquefier tube at the increased feed rate with substantially no thermal degradation of the liquefied consumable material.

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