Flow cut-off method and apparatus for foundry installations

Details Flow cut-off method and apparatus for foundry installations Flow cut-off method and apparatus for foundry installations

1978-08-29

1980-10-14

Baldwin, Robert D.

Metal founding

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

Control of feed material enroute to shaping area

164 4, B22D 4600

Patent

active

042275652

ABSTRACT:
A foundry installation control device is disclosed for causing a rapid cut off of a molten metal flow at the time when a mold is full. Two detectors are provided, one of which collects information concerning the instantaneous rate of metal flow pouring from a ladle into a sprue cup while the other collects information on the level of the molten metal in the cup. An electronic circuit connected to the outputs of the two detectors produces a mold filling signal which undergoes a sharp fluctuation at the precise moment when filling is completed. This signal is compared with an instruction value and causes the generation of a flow cut-off signal which triggers the cessation of pouring by righting of the ladle in the case of a tilting ladle, closing of the stopper in the case of a bottom-pour ladle, or closing the discharge valve in the case of a pressure ladle.

REFERENCES:
patent: 2946943 (1960-07-01), Nye et al.
patent: 3252099 (1966-05-01), Dodd
patent: 4134444 (1979-01-01), Fujie et al.
patent: 4137504 (1979-01-01), Simmons

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