Metal founding – Process – With measuring – testing – inspecting – or condition determination
Patent
1974-08-12
1976-06-08
Shore, Ronald J.
Metal founding
Process
With measuring, testing, inspecting, or condition determination
164119, 164155, B22D 2714
Patent
active
039616622
ABSTRACT:
A method of controlling the rate of filling of a casting mold wherein a pressure P.sub.1 is applied to a chamber containing a crucible holding the molten material to be cast, a pressure P.sub.2 is provided in a chamber containing the mold, the mold is connected with the crucible by a tube conveying the molten material to the mold, and the molten material is displaced through the tube by a pressure differential .DELTA.p equal to P.sub.1 -P.sub.2, which comprises detecting the time derivatives dP.sub.2 /dt and d.DELTA.P/dt of the pressure in the chamber containing the mold and the pressure differential, respectively. The rate of variation of the pressure in the chamber of the mold is monitored to regulate the process while one of the other derivatives is compared with a set point value to control one of the pressures as a function of time to vary the rate of filling of the mold in accordance with a predetermined program.
REFERENCES:
patent: 2990592 (1961-07-01), Hursen
patent: 3196501 (1965-07-01), Balevsky et al.
patent: 3302253 (1967-02-01), Moriyama
patent: 3302254 (1967-02-01), Moriyama
patent: 3768542 (1973-10-01), Bosworth et al.
Balevski Angel Tonchev
Momchilov Emil Nikolov
Nenov Dragan Iliev
Nikolov Ivan Dimov
Dubno Herbert
Hampilos Gus T.
Institut po Metaloznanie i Technologia na Metalite
Ross Karl F.
Shore Ronald J.
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