| 摘要 |
PURPOSE:To improve reliability of soldering by providing a cylinder provided with a heater on its upper peripheral part while being thermally insulated from a high boiling point liquid inside a tank so as to perform electrode treatment by charging chip parts into the cylinder from the charging part. CONSTITUTION:An air layer 32 is formed on the upper part of a cylinder 28 and on the peripheral part of a heater 30 by a shielding plate 31 made of stainless steel thermally intercepted from the outside and holding insulation. Chip parts 7 are charged into the upper part 33 inside the cylinder having high temperature by a feeder 36, a line feeder 37 and a rotary chute 38. An Sn-Pb alloy plated film, which is the outermost layer of an electrode is melted in the upper part 33 of the cylinder to fall down to the low temperature part having a temperature gradient for being collected inside a takeoff net 39. This takeoff net 39 is pulled up from a normal temperature liquid surface 35 in order to take out treated chip parts 26. Thereby, the film itself on the outermost layer becomes a clean film containing no impurities so as to improve solder wetting and soldering reliability. |
