James Sute - Trenton MI, US Peter Hannish - Shelby Township MI, US Matthew Blaisdell - Canton MI, US Nicholas Howell - Grosse Pointe Park MI, US
International Classification:
A01G 25/09 B05B 17/04 A01G 27/00
US Classification:
239011000, 239001000, 239067000, 239069000
Abstract:
The invention concerns a two-part spray application system and method for applying a two-part spray on an object. First and second pumps have outlets, with the pressure at each outlet monitored by pressure transducers. During the spraying process for each object, the pressure at the outlet of each pump must exceed a minimum threshold pressure at least once, or a fault condition is indicated. Such fault conditions may indicate a leak or disconnect in a hose downstream of the pumps.
A paint circulation system includes a paint reservoir, a pressure transducer, a servo motor driven pump, an electronic servo drive and controller, one or more paint applicators in a spray booth and an isolation valve. The pressure transducer provides a signal to the controller indicating the current pressure in the system. The servo pump is controlled by the controller and servo drive, draws paint from the reservoir and maintains the desired pressure in the system. The isolation valve is downstream from the applicators and is closed when paint is requested by the applicators. When paint is flowing to the applicators, the servo drive adjusts pump speed to maintain the desired system pressure as sensed by the pressure transducer. When paint is not requested, the isolation valve is open and the servo pump motor operates to provide a minimum flow rate to circulate paint from, and return it to, the reservoir.