BOTTOM HOLE OUTLET TYPE FLOATING METAL MELTING DEVICE

Japanese Patent JP3570083

B2

PROBLEM TO BE SOLVED: To melt and remove the remaining metal in the vicinity of the outlet of a crucible to operate continuously by taking out molten metal from a bottom hole outlet type floating metal melting device, then reducing a of a power factor improving capacitor, and carrying a current through an induction coil at a higher frequency than the normal frequency.
SOLUTION: A metal put in a good conductor metal crucible to which longitudinally long slits are formed at almost equal intervals in heated an melted in the floating state, with an alternating magnetic field from an induction coil arranged on the outer circumferential side of the crucible, and molten metal is taken out from a flow out post in the bottom by operating a stop. In a bottom hole outlet type floating metal melting device, high-frequency AC current obtained by connecting a three-phase AC power source to an AC power source 4b or 4a, comprising a rectify circuit and a switching element is supplied to the induction coil 3. In the current supply circuit, a fixed capacitor 11 and a variable capacitor 12 connected in parallel is connected to the induction coil 3, in parallel or in series with the induction coil 3. After the molten metal has been taken out, power factor is reduced by opening the variable capacitor 12, current is supplied at to melt and remove the remaining metal a high frequency higher than the frequency in the normal operation.

Hideaki Tadano
Masaki Sakuma
Kengo Kainuma

JP13045496A

September 29, 2004

May 27, 1996

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Fuji Electric Systems Co., Ltd.

H05B6/32; F27B14/06; (IPC1-7): H05B6/32; F27B14/06

JP5174963A
JP8285463A
JP515950A
JP7245182A

Masaharu Shinobe

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