| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide "a coating applicator" easily returning to a circulation state after a coating liquid is forcedly fed.SOLUTION: A coating applicator 10 comprises: a coating head 11; a supply tank 13 for supplying a coating liquid; a buffer tank 16 provided in a pipe 15a through which the coating liquid returns to the supply tank 13 from the coating head 11; a circulation pump 17 provided in a pipe 15b between the buffer tank 16 and the supply tank 13; and a negative-pressure unit 31 for supplying negative pressure to the supply tank 13, and circulates the coating liquid by the circulation pump 17 in a state of putting the supply tank 13 under negative pressure. The coating applicator 10 comprises: a supply tank pressure sensor 51; a buffer tank pressure sensor 52; an electromagnetic on-off valve 21 provided in the pipe 15a; and a control device 60 for controlling the electromagnetic on-off valve 21. The control device 60 is constituted for putting the electromagnetic on-off valve 21 in an opening state on condition that a pressure difference between supply tank 13 pressure and buffer tank pressure 16 is within a predetermined range of a pressure difference between the supply tank 13 and the buffer tank 16 maintained when circulating the coating liquid, after the electromagnetic on-off valve 21 is closed.</p> |
