| 摘要 |
PURPOSE:To prevent a heat transfer liquid from being discharged to the outside of a soldering device by lowering and rising guide rails of a heating liquid tank part by means of a vertical moving device. CONSTITUTION:A hydraulic cylinder operates and a movable base 63 descends when a printed circuit board 1 comes to movable rails 70. The rails 70 are, therefore, lowered as well respectively by means of supporting bars. The printed circuit board 1 is preheated in the part upper than the boundary face 6b of the vapor 6a layer of the heat transfer liquid 6. The preheated printed circuit board descends further to enter the vapor 6a layer where the circuit board is heated and soldered. The soldered printed circuit board 1 is returned to the home position as a movable base 63 is raised by the operation of the hydraulic cylinder and the rails 70 are raised as well. The vapor of the heat transfer liquid is thereby stagnated in the heating liquid tank 8 and the discharge of the vapor of the heat transfer liquid to the outside is prevented. |
