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Print head nozzle for use with additive manufacturing system

  • US 10,029,415 B2
  • Filed: 08/16/2012
  • Issued: 07/24/2018
  • Est. Priority Date: 08/16/2012
  • Status: Active Grant
First Claim
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1. A nozzle for use with a print head in an extrusion-based additive manufacturing system, the nozzle comprising:

  • an inlet end configured to be secured to a flow channel of the print head;

    a tip end offset longitudinally from the inlet end;

    a tip pipe extending longitudinally at least part way between the inlet end to the tip end;

    the tip end comprising;

    an outlet port of the tip pipe configured to extrude molten material from the print head, the outlet port having a first diameter;

    an inner ring having a second diameter that is larger than the first diameter, wherein the inner ring is substantially concentric and co-planar with the outlet port, wherein the first diameter and the second diameter define a substantially planar surface therebetween;

    an outer ring comprising a knife edge having a third diameter at the knife edge that is larger than the second diameter, wherein the outer ring is substantially concentric and co-planar with the inner ring; and

    at least one annular recessed groove having an opening located between the inner ring and the outer ring, wherein the nozzle is configured to produce smooth extruded roads of material having a first width and a second width, wherein the first width is substantially that of the second diameter and the second width is substantially that of the third diameter, wherein the at least one annular recessed groove is configured to accept a flowable material extruded from the outlet port such that at least a portion of the extruded flowable material is accepted by the at least one annular recessed groove such that the extruded flowable material contacts and is guided by the outer ring to form the road of material and the second width.

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