Apparatus for controlling the rate of filling of casting molds

Details Apparatus for controlling the rate of filling of casting molds Apparatus for controlling the rate of filling of casting molds

1976-01-23

1977-09-27

Shore, Ronald J.

Metal founding

Control means responsive to or actuated by means sensing or...

Control of feed material enroute to shaping area

164 4, 164119, 164309, B22D 1706, B22D 1732

Patent

active

040505030

ABSTRACT:
An apparatus for casting a molten material in which the mold is received in one chamber and the molten material is received in another chamber, the two chambers being subject to different pressures so that a tube connecting them can deliver the molten material from the second chamber to the first under a pressure differential. Signal-producing apparatus connected to the mold chambers produce signals representing the two pressures and the pressure differential, the signal-producing apparatus being connected to differentiating apparatus whose output produces time derivatives of the pressures and pressure differential. The time derivatives can be used to control the pressures via a comparator to which a reference value or set point signal is applied thereby varying the rate of filling of the mold in accordance with a predetermined program.

REFERENCES:
patent: 1013548 (1912-01-01), Grey
patent: 2461723 (1949-02-01), Cowan
patent: 2990592 (1961-07-01), Hursen
patent: 3196501 (1965-07-01), Balevski et al.
patent: 3302253 (1967-02-01), Moriyama
patent: 3302254 (1967-02-01), Moriyama
patent: 3358746 (1967-12-01), Crowe
patent: 3532154 (1970-10-01), Balevski et al.
patent: 3768542 (1973-10-01), Bosworth et al.

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