| 摘要 |
PROBLEM TO BE SOLVED: To provide a coating material supply device capable of cleaning a pipe line between a coating material circulation pipe line, in which a pig is inserted, and a color change valve for color changing. SOLUTION: In the coating material supply device, in which the coating material circulation pipe line 41 with the inserted pig PG is connected to the changing valve 22a of a color change valve unit 2 provided on the upstream side of a coater 1, a stop valve 61 for opening and closing the pass of the coating material supplied from the coating material circulation pipe line 41, a 1st three way valve 62, to which a fluid for cleaning is supplied, and a 2nd three way valve 63, to which a fluid for pushing out is supplied, are provided successively from the upstream side in a coating material pipe line 6 for connecting the changing valve 22a to the coating material circulation pipe line 41. When the coating with the previous color is finished, a 2nd fluid C for pushing out and a fluid AR for pushing out are supplied to the 2nd three way valve 63 to push out the previous color coating material A remaining in the coating material pipe line 6 between the 2nd three way valve 63 and the coating material circulation pipe 41, and next, the fluid for cleaning is supplied to the 1st three way valve 62 to clean the coating material pipe line 6 between the 1st three way valve 62 and the changing valve 22a.
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