| 摘要 |
PURPOSE:To prevent generation of thermal stress and strain and to obtain a product having good quality by soldering a material to be soldered without collapsing the thermal equil. state thereof. CONSTITUTION:A material to be soldered is carried by a conveyor 5 into a flux tank 1, where a flux is coated thereon, then the material enters the inside of a thermal equil. tank 6 constituted of an atmosphere furnace or the like where the material is preheated to about the temp. of the solder in a soldering tank disposed in the tank 6. The material heated to a set soldering temp. is dipped in the soldering tank and is thus subjected to soldering. The material is thereafter moved into a cooling tank 7 constituted of an atmosphere furnace set with a gentle temp. gradient, and is slowly cooled without coolapsing the thermal equil. state, and thereafter the material is discharged from the furnace. |
