Patent ID: 8302835

Claim:
A point flow soldering apparatus for soldering lead of electronic component, the apparatus comprising a solder bath, and a jet nozzle which flows out the solder contained in the solder bath upward, the electronic component being positioned over the jet nozzle so as to be away from it by a predetermined distance, characterized in that the jet nozzle contains: an outer cylinder which has openings at an end and the other end thereof along an axial direction, the opening at the end thereof being positioned inside the solder bath, the opening at the other end thereof being positioned outside the solder bath; an inner cylinder which is installed inside the outer cylinder and has openings at an end and the other end thereof along the axial direction, the opening at the end thereof being positioned inside the solder bath, the opening at the other end thereof being positioned outside the solder bath; and a nozzle cap which has an insert hole for allowing the lead to be inserted and completely covers the openings at the other ends of the inner and outer cylinders, such that said openings at the other ends are exposed to air via only a part of the insert hole, wherein the solder contained in the solder bath is flown from inside of the inner cylinder to the nozzle cap to fill the nozzle cap with the solder up to the top of the insert hole, the solder filling the nozzle cap up to the top of the insert hole solders the lead inserted into the insert hole, and the solder is then flown downward from between the inner and outer cylinders.