Apparatus for controlling the moisture content of foundry sand

Details Apparatus for controlling the moisture content of foundry sand Apparatus for controlling the moisture content of foundry sand

1979-06-27

1981-12-08

Baldwin, Robert D.

Metal founding

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

Responsive to thermal condition

164 5, B22C 508

Patent

active

043042899

ABSTRACT:
A sand moisture control system for a sand casting foundry system incorporates non contact sensing techniques for controlling the moisture content of foundry sand by the addition of water at the muller or mixing operation of a sand casting system. The temperature of the foundry return sand is measured by an infrared detector while moisture content is measured by a microwave detector along the conveyor feed input to the muller or at the return sand holding tank. Electrical outputs from each detector corresponding to temperature and moisture are integrated to provide a signal corresponding to the % of moisture deviation from a predetermined value and this signal is utilized to control the amount of water added to the Muller.

REFERENCES:
patent: 3172175 (1965-03-01), Hartley
patent: 3693079 (1972-09-01), Walker
patent: 4108188 (1978-08-01), McMullen et al.
patent: 4141404 (1979-02-01), McMullen

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