US 11,701,813 B2
Methods for three-dimensionally printing and associated multi-input print heads and systems
Travis Alexander Busbee, Somerville, MA (US)
Assigned to Kornit Digital Technologies Ltd., Rosh HaAyin (IL)
Filed by Kornit Digital Technologies Ltd., Rosh HaAyin (IL)
Filed on Aug. 26, 2020, as Appl. No. 17/3,089.
Application 17/003,089 is a continuation in part of application No. 15/907,122, filed on Feb. 27, 2018, abandoned.
Claims priority of provisional application 62/555,874, filed on Sep. 8, 2017.
Claims priority of provisional application 62/555,886, filed on Sep. 8, 2017.
Claims priority of provisional application 62/464,363, filed on Feb. 27, 2017.
Prior Publication US 2021/0039306 A1, Feb. 11, 2021
Int. Cl. B29C 64/112 (2017.01); B29C 64/245 (2017.01); B29C 64/227 (2017.01); B29C 64/314 (2017.01); B29C 64/336 (2017.01); B29C 64/209 (2017.01); B33Y 10/00 (2015.01); B33Y 40/10 (2020.01); B33Y 70/00 (2020.01); B29L 31/50 (2006.01); B29K 75/00 (2006.01); B29K 67/00 (2006.01); B29K 77/00 (2006.01); B29K 55/02 (2006.01)
CPC B29C 64/112 (2017.08) [B29C 64/209 (2017.08); B29C 64/227 (2017.08); B29C 64/245 (2017.08); B29C 64/314 (2017.08); B29C 64/336 (2017.08); B29K 2023/06 (2013.01); B29K 2055/02 (2013.01); B29K 2067/003 (2013.01); B29K 2075/00 (2013.01); B29K 2077/00 (2013.01); B29L 2031/505 (2013.01); B33Y 10/00 (2014.12); B33Y 40/10 (2020.01); B33Y 70/00 (2014.12)] 17 Claims
OG exemplary drawing
 
1. A method for printing a three-dimensional thermoplastic part, using a print head having a microfluidic printing nozzle, the method comprising:
heating to a temperature greater than 100 degrees Celsius, by use of at least one heating device, a mixing chamber of the microfluidic printing nozzle;
pumping, into the mixing chamber, at least a first fluid polymeric material and a second fluid polymeric material through at least a first inlet and a second inlet respectively, by use of a first pump and a second pump respectively, wherein each of the first pump and the second pump comprises a rotary positive displacement pump;
actively mixing at least the first fluid polymeric material and the second fluid polymeric material using an impeller in the mixing chamber; and
extruding the mixture of at least the first fluid polymeric material and the second fluid polymeric material onto a substrate, thereby to print the three-dimensional thermoplastic part.