Dispensing – Molten metal dispensing – Flow controllers or assists
Patent
1980-08-18
1982-11-02
Scherbel, David A.
Dispensing
Molten metal dispensing
Flow controllers or assists
222 63, B22D 3902
Patent
active
043569404
ABSTRACT:
Apparatus for dispensing measured amounts of molten metal to a metal casting operation which is automatic in operation and capable of delivering extremely accurately controlled amounts of metal to the casting operation. A positive displacement pump delivers the molten metal from below the surface of the metal to a dispensing point and a pulse generator generates pulses in exact proportion to the displacement of the pump and delivers such pulses to counters, the counters being started in operation when the metal being pumped contacts a probe at the dispensing point, the counters stopping the pump when an exact amount of displacement of the pump has occurred. Rate multipliers are provided between the pulse generator and the counters to compensate for leakage in the pump, variations in volume delivered for a given displacement of the pump or other unanticipated variables.
REFERENCES:
patent: 3708088 (1973-01-01), Lesher
patent: 3797808 (1974-03-01), Ma et al.
patent: 3876191 (1975-04-01), Lauersdorf
patent: 3888388 (1975-06-01), Mahoney
patent: 3889849 (1975-06-01), Chandler, Jr.
patent: 3904078 (1975-09-01), Neff et al.
patent: 4078706 (1978-03-01), Hanuszczak
Lester Engineering Company
Scherbel David A.
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