US 11,919,241 B1
Optimized nozzle design for drop-on-demand printers and methods thereof
Christoforos Somarakis, Gilroy, CA (US); Svyatoslav Korneev, San Jose, CA (US); Saigopal Nelaturi, Mountain View, CA (US); and Adrian Lew, Stanford, CA (US)
Assigned to XEROX CORPORATION, Norwalk, CT (US)
Filed by XEROX CORPORATION, Norwalk, CT (US)
Filed on Feb. 25, 2021, as Appl. No. 17/185,826.
Int. Cl. B29C 64/386 (2017.01); B22F 10/80 (2021.01); B22F 12/53 (2021.01); B29C 64/209 (2017.01); B33Y 30/00 (2015.01); B33Y 50/00 (2015.01); G06F 30/10 (2020.01); G06F 30/20 (2020.01)
CPC B29C 64/386 (2017.08) [B22F 10/80 (2021.01); B33Y 50/00 (2014.12); G06F 30/10 (2020.01); G06F 30/20 (2020.01); B22F 12/53 (2021.01); B29C 64/209 (2017.08); B33Y 30/00 (2014.12)] 30 Claims
OG exemplary drawing
 
1. A method for designing a nozzle for jetting printing material in a printing system, the method comprising:
selecting a surface tension and viscosity of a printing material at a jetting temperature;
selecting a drop volume of the printing material; and
constructing a constricted axisymmetric dissipative section of the nozzle, comprising:
defining a length of the constricted axisymmetric dissipative section with respect to an orifice length;
defining a cross-sectional area of the constricted axisymmetric dissipative section;
defining a diameter of constriction, dc, of the constricted axisymmetric dissipative section that is approximately constant along the length of the constricted axisymmetric dissipative section; and
expelling a build material from the nozzle, the nozzle comprising the defined length and cross-sectional area of the constricted axisymmetric dissipative section; and wherein
a relaxation time, τ, of the nozzle is independent of the defined length of the constricted axisymmetric dissipative section and is proportional to dc2.