Apparatus for controlling a pressure-type furnace for pouring mo

Details Apparatus for controlling a pressure-type furnace for pouring mo Apparatus for controlling a pressure-type furnace for pouring mo

1982-02-03

1984-05-01

Rutledge, L. Dewayne

Metallurgical apparatus

With control means responsive to sensed condition

With analyzer or computation means

222595, 222590, 266 91, B22D 3900

Patent

active

044456700

ABSTRACT:
A method and apparatus for controlling the pouring of molten metals in a pressure-type furnace is provided. The furnace includes a reservoir for storing the molten metal, a first passage for supplying the metal to the reservoir, and a second passage for supplying the metal stored in the reservoir to a pouring chamber where they are poured into a mold. A gas having a predetermined pressure is supplied to a pressure chamber disposed above the reservoir. An output signal from a load cell is generated representative of the amount of the metal contained in the furnace. The output signals are processed in a sampling circuit to obtain a rate of variation signal representative of variations in the amount of the metal stored in the furnace. The rate of variation signal is compared in a comparator circuit with a reference value to generate a replenishment signal indicating that the molten metal is being replenished. Excessive gas supplied to the pressure chamber is released in response to the replenishment signal so that the molten metal is poured evenly as the metal is replenished.

REFERENCES:
patent: 3412899 (1968-11-01), Sutter
patent: 3998365 (1976-12-01), Lethen et al.

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