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Ribbon liquefier and method of use in extrusion-based digital manufacturing systems

  • US 10,500,829 B2
  • Filed: 05/02/2017
  • Issued: 12/10/2019
  • Est. Priority Date: 09/30/2009
  • Status: Active Grant
First Claim
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1. A method for building a three-dimensional model in an extrusion-based additive manufacturing system, the method comprising:

  • heating a liquefier retained by the extrusion-based digital manufacturing system, the liquefier having a non-cylindrical static channel with an inlet end and an outlet end;

    feeding a non-cylindrical filament into the inlet end of the static channel of the heated liquefier;

    melting the non-cylindrical filament in the static channel to at least an extrudable state with the heat to provide a molten material;

    moving the molten material from the non-cylindrical static channel to an extrusion tip disposed at the outlet end of the channel with a viscosity-pump action of the fed non-cylindrical filament wherein the extrusion tip has a substantially circular cross-section;

    extruding the molten material from the extrusion tip; and

    depositing the extruded material as a road to form at least a portion of a layer of the three-dimensional model.

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