Abstract: Cleaning method upon color-change in an electrostatic multi-color coating apparatus adapted to supply paints of a multiplicity of colors, a cleaning air and a cleaning thinner selectively from a color-change device by way of a paint supply channel and a paint hose to an electrostatic multi-color coating machine, comprises successively steps of supplying a cleaning air and a cleaning thinner to the paint supply channel and cleaning the inside thereof by removing to discharge the paint remaining in the paint supply channel to a liquid discharge tank, sucking the paint remaining in the electrostatic coating machine and in the paint hose connected at one end thereof to the electrostatic coating machine from the other end of the paint hose and discharging the paint thus sucked to the liquid discharge tank, and then supplying a cleaning thinner and a cleaning air to the paint hose and the electrostatic coating machine to clean the inside thereof.

Abstract: In a cleaning device upon color-change in an electrostatic multi-color electrostatic coating apparatus comprising first and second color-change devices each for supplying paints of a multiplicity of colors, cleaning air and thinner selectively through the first and second paint supply channels respectively and a valve mechanism disposed near the coating machine for supplying a paint supplied from the first or second color-change device through the first or second paint supply channel to the coating machine by way of a common paint hose, the valve mechanism comprises first and second switching valves each having exit channels for two ways connected to the first or supply channel, and low pressure air and thinner supply valves disposed respectively to a manifold in communication with the paint hose in which each one of exit channels for the first and second switching valves is connected by way of the manifold to the paint hose, while each the other of exit channels for the switching valve is connected by way of