| 摘要 |
<p>[PROBLEMS] In the conventional jet solder baths, there have been problem of nonuniform height of molten solder jetted out from a nozzle port of a secondary jetting nozzle, a problem of an oxide applied from the nozzle port and adhered on a printed board, and a problem of erosion of a member composing the jet solder bath. [MEANS FOR SOLVING PROBLEMS] In a jet solder bath, a cylinder is placed at one end of a duct, a spiral pump is arranged on the cylinder, and a horizontal width of a nozzle port is permitted to be narrower than that of the duct.</p> |
