| 摘要 |
PURPOSE:To control surely and safely the outflow rate of a molten non-ferrous metal by controlling the voltage to be impressed to an electromagnetic pump which is reverse-current driven by the induced current induced in the molten non-ferrous metal flowing out under the stored pressure and the magnetic field generated by a coil. CONSTITUTION:The induction type electromagnetic pump 6 is disposed to a supply pipe 3 provided with a heater 14 and a damper 7 for emergency stop in a method for storing the molten non-ferrous metal 5 of Al, etc. in a furnace 1 and discharging the molten metal through a tap hole 2 and the above-mentioned supply pipe 3 by the storage pressure thereof to a distributor 4 of a casting machine. The induced current is induced in the outflowing molten metal by the coil of the pump 6 and the pump 6 is reverse-current driven toward the furnace 1 side in the arrow 8 direction by such induced current and the magnetic field generated from the above-mentioned coil. The outflow rate of the molten metal is controlled by detecting the outflow speed of the molten metal 5 from the reading of a level gage 13 disposed to the distributor 4, feeding back the detected speed and controlling the voltage to be impressed to the above-mentioned coil to apply the damping voltage and to adjust the voltage.
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