PURPOSE: To shorten soldering time and prevent the thermal deterioration of an enamel wire by using an electric soldering iron having a chip cartridge capable of regularly holding the surface temperature at the Curie temperature.
CONSTITUTION: The chip top end part 1 of an electric soldering iron consists of copper, and a heater part 2 has an inner layer consisting of copper and a surface layer consisting of a magnetic body having the Curie temperature ranging from 300°C to 500°C. A high frequency current is carried to an induction coil 3 wound on the heater part 2 to apply a high frequency magnetic field, and the temperature of the heater part 2 is automatically regulated to the Curie temperature. When an electric part using a brazing ester imide wire as an enamel wire is manufactured by using the thus-constituted electric soldering iron, the soldering time of the enamel wire for a terminal can be shortened, the thermal deterioration of the enamel wire by overheat effect is prevented, and a highly reliable electric part can be manufactured.
YAMAMOTO YOSHIKAZU
AIMONO YUJI
