| 摘要 |
A bath apparatus 12 reserves a liquid 13 as a heating medium and includes an input partition bath 31 , a first intermediate partition bath 32 , a heat partition bath 33 , a second intermediate partition bath 34 and a removing partition bath 35 that are divided by gates 21 through 24 and sequentially arranged in a direction in which a printed board assembly where components are loaded onto a printed board moves. The temperatures of liquids 13 - 31 and 13 - 32 in the input partition bath 31 and the first partition bath 32 are a preheating temperature. The temperature of a liquid 13 - 33 in the heat partition bath 33 is a soldering temperature. The gate 21 is gradually opened while the printed board assembly 11 is located in the first intermediate partition bath 32 and before the printed board assembly 11 is conveyed into the heat partition bath 33 . The liquid in the heat partition bath 33 is mixed with the liquid in the first intermediate partition bath 32 , and thus the temperature of the first intermediate partition bath 32 is gradually increased to the soldering temperature. The temperature of the printed board assembly 11 is gradually increased from the preheating temperature to the soldering temperature.
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