| 摘要 |
<p>A coating device (10) is constructed such that a cleaning liquid ejection valve unit (14) for mixing cleaning liquid and air and ejecting the mixture is connected to an upstream portion of a coating material pipe path (11), where a coating material passes, of a block body (12), that coating material valve units (13) for switching between coating colors and supplying a coating material of a specific color to the painting material pipe path (11) are connected to an intermediate section (11c) of the pipe path (11), and that a coating material ejection device (18) is connected to a downstream portion (11b) of the coating material pipe path (11). A cleaning liquid nozzle is directed so that the cleaning liquid flows along the inner wall of a cross section of the coating material pipe path (11). Further, the cross section of the pipe path (11) is formed in a non-circular shape such as an ellipse. In removal of coating material remaining in the pipe path (11), the construction reduces attenuation of cavitation vibration (kinetic energy) of the cleaning liquid and reduces the amount of use of the cleaning liquid.</p> |
