US 11,865,779 B2
Apparatus, system and method of providing a FFF printing nozzle
Erik Gjovik, St. Petersburg, FL (US); and William J. MacNeish, III, St. Petersburg, FL (US)
Assigned to JABIL INC., St. Petersburg, FL (US)
Filed by JABIL INC., St. Petersburg, FL (US)
Filed on Aug. 4, 2021, as Appl. No. 17/393,883.
Application 17/393,883 is a continuation of application No. 16/322,650, previously published as PCT/US2017/045086, filed on Aug. 2, 2017.
Claims priority of provisional application 62/371,614, filed on Aug. 5, 2016.
Prior Publication US 2022/0024127 A1, Jan. 27, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B29C 64/209 (2017.01); B33Y 30/00 (2015.01); B33Y 50/00 (2015.01); B29C 64/386 (2017.01); B29C 64/118 (2017.01); B29C 64/295 (2017.01); B33Y 50/02 (2015.01)
CPC B29C 64/209 (2017.08) [B29C 64/118 (2017.08); B29C 64/295 (2017.08); B29C 64/386 (2017.08); B33Y 30/00 (2014.12); B33Y 50/00 (2014.12); B33Y 50/02 (2014.12)] 7 Claims
OG exemplary drawing
 
1. A fused deposition printhead for additive manufacturing, capable of receiving a solid print material at an input thereof for extrusion as a liquid from an output thereof, comprising:
a heat-conductive nozzle having a non-heat-conductive chamber therewithin configured to receive the solid print material at an input thereof and extruding the liquid at an output thereof;
a deposited insulative coating on an outermost surface of the heat-conductive nozzle;
a heat-conductive sensor under the deposited insulative coating and connected to a portion of the heat-conductive nozzle, and the heat-conductive sensor configured to transmit information regarding the portion of the heat-conductive nozzle through the insulative coating;
a resistive wire heating element wound around both the insulative coating and the heat-conductive nozzle and configured to progressively heat the solid into the liquid between the input and the output; and
a non-heat-conducting sheath enclosing the insulative coating, the heat-conductive nozzle and the heat-conductive sensor, and having therein embedded the resistive wire heating element; and
a low-emissivity material partially, substantially, or completely surrounding the outside of the non-heat-conducting sheath and configured to reflect infrared energy toward the heat-conductive nozzle.