US 12,343,755 B2
Installation for the application of a coating product and method for controlling such an installation
Cédric Le-Strat, Epernay (FR); and Ilhan Tel, Epernay (FR)
Assigned to EXEL INDUSTRIES, Epernay (FR)
Filed by EXEL INDUSTRIES, Epernay (FR)
Filed on Jun. 12, 2023, as Appl. No. 18/333,157.
Claims priority of application No. 2205743 (FR), filed on Jun. 14, 2022.
Prior Publication US 2023/0398566 A1, Dec. 14, 2023
Int. Cl. B05C 11/10 (2006.01); B05B 12/00 (2018.01); B05B 12/08 (2006.01); B05C 5/02 (2006.01); B05B 13/04 (2006.01)
CPC B05C 11/1007 (2013.01) [B05B 12/008 (2013.01); B05B 12/085 (2013.01); B05C 5/0279 (2013.01); B05B 13/0431 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An installation for the application of a coating product comprising a print head equipped with a plurality of nozzles and supplied by a source of coating product, each nozzle being controlled by a valve supplied by the source of coating product, the installation comprising:
a coating product accumulator installed on a circuit for the circulation of the coating product, which passes through the print head, comprising a deformable or movable wall delimiting, at least in part, a first chamber of variable volume supplied with coating product and a second chamber of variable volume supplied with gas, under a predetermined pressure, wherein the predetermined pressure for supplying the second chamber of variable volume is equal to a nominal operating pressure of the print head, and wherein the first chamber of variable volume is supplied or purged with coating product due to a difference between an instantaneous coating product ejection rate from the print head and a supply rate to the print head from the coating product source;
means for detecting a difference between the instantaneous ejection rate and the supply rate; and
a control unit configured to adjust an operating setpoint value of the coating product source as a function of the difference between the instantaneous ejection flow rate and the supply flow rate, in a direction to reduce this difference between the flow rates.