| 摘要 |
PURPOSE:To obtain a clad were with improved wetting properties by cutting a long conductive metal wire into several pieces and making an area without solder flat after adhering solder to the surface of outer periphery of the long conductive metal wire in a certain gap and turning it into one piece when producing a metal wire material for lead terminals of each electronic component. CONSTITUTION:A long conductive metal wire 10 is allowed to pass between a backing roll 20 and a transfer roll 21 and a solder paste 11 is adhered to the surface of the metal wire 10 while it exists between these rolls. For adhering, a paste 11 is applied to a stainless roll 23 with recesses at certain gap from a paste pot 22 with a solder and a binder or a flux, the extra paste 11 is eliminated by a doctor blade 24, and the paste 11 is transferred to the roll 21. After that, heat treating is performed to make the metal wire 10 and solder into a solid piece, it is cut individually, and the edge part where no solder is adhered is flattened for obtaining a clad wire. |
