Electric heating – Metal heating – Of cylinders
Patent
1989-09-06
1990-10-09
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 75, 219 1043, 219 1079, 75 1014, 75 1017, 4251748R, H05B 640
Patent
active
049622919
ABSTRACT:
An apparatus is disclosed for producing metal powder having a molten metal holding vessel with a generally cylindrical shaped bottom portion, a molten metal discharging runner located at the bottom portion of the holding vessel, a spraying chamber connected at a lower end of the discharging runner, a first induction heating coil having a diameter and surrounding the holding vessel, a second induction heating coil surrounding the discharging runner, and a ring-shaped magnetic shielding plate disposed between the second induction heating coil and the sliding gate. The discharging runner has a nozzle portion which includes a sliding gate made of ceramic. The sliding gate is movable for controlling the flow of the molten metal through the nozzle portion of the discharging runner. The spraying chamber has gas-jetting nozzles. The second induction heating coil has a diameter smaller than a diameter of the first induction heating coil.
REFERENCES:
patent: 2448690 (1948-09-01), Storm
patent: 4300031 (1981-11-01), Reboux et al.
patent: 4438310 (1984-03-01), Cachat
patent: 4534917 (1985-08-01), Walz
patent: 4762553 (1988-08-01), Savage et al.
patent: 4770718 (1988-09-01), Verhoeven et al.
Demukai Noboru
Fujita Senji
Daido Tokushuko Kabushiki Kaisha
Leung Philip H.
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