PURPOSE: To manufacture efficiently a uniform, smooth conductive core by sintering and molding a continuous iron fiber nonwoven body by hot-pressing at reducing atmosphere with heat resistant rollers which are installed in a heating section and a heat resistant and shock resistant endless belt with grooves.
CONSTITUTION: A nonwoven body 8 placed on an endless belt with grooves 4 comprising a carbon plate, silicon nitride ceramic plate, silicon carbide ceramic plate is introduced into a gas replacing chamber 1 and after air in the nonwoven body is replaced by an atmosphere gas mixture comprising nitrogen and hydrogen, the nonwoven body is fed to a heating zone 2. The nonwoven body is roller- pressed with several rollers 5 comprising heat resistant carbon, quartz, silicon nitride, or silicon carbide, which are installed in the heating zone 2. Because the nonwoven body is roller-pressed in a semi-molten state, a desired thick conductive core can be manufactured by one sintering without repeating process of preliminary sintering, press-molding, sintering, and press-molding.
TAKESHIMA KENJI
OSHITANI MASAHIKO
