| 摘要 |
PROBLEM TO BE SOLVED: To effectively raise or keep temperatures of treatment liquids in a degreasing tank and a chemical conversion tank both for immersing the above automotive body therein, in a process for coating the automotive body, and to reduce a cost for keeping the temperatures of the liquids. SOLUTION: The temperature-raising system 20 comprises a hot water tank 22 filled with hot water heated by steam supplied from outside, the degreasing tank 24 filled with a degreasing liquid, the chemical conversion tank 26 filled with a chemical conversion liquid, a leakage prevention valve 28 connected to a pipe for connecting the above degreasing tank 24 with the hot water tank 22, a recovery tank 30 for recovering a liquid accumulated in the above pipe and the like, a pump 32 for circulating the liquid which has been accumulated in the above recovery tank 30, to the hot water tank 22, and a heat exchanger 34 for exchanging heat between the hot water and the chemical conversion liquid, which is arranged between the above hot water tank 22 and the chemical conversion tank 26 through several pipelines. COPYRIGHT: (C)2004,JPO&NCIPI
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