Patent ID: 6726082
Filing Date: 2004-04-27
Classification: B23K

Abstract:
A soldering apparatus for soldering a printed wiring board, comprising:a solder vessel containing molten solder; a nozzle disposed in said vessel and having a first opening at one end thereof and a second opening at the other end thereof, said first opening being disposed above the surface level of the molten solder contained in said vessel; and an electromagnetic pump secured in said vessel and including: a tubular member defining a solder flow path therein and having an inlet and an outlet connected to said second opening of said nozzle such that the molten solder can flow from said inlet to said outlet through said path, one or more cores, and one or more electrically energizable coils, said tubular member, said cores and said coils being immersed in the molten solder below the surface level of the molten solder so that thermal energy generated by the electromagnetic pump is transferred to the solder, said electromagnetic pump being arranged to generate a moving magnetic field in said path when said coils are electrically energized, so that the molten solder is fed from said inlet to said outlet and is projected from said first opening of said nozzle to form a solder wave.