AFS Library

COMPUTERIZED SANDOLOGY FOR INSTANT SAND CONTROL

19700240
Journal: Modern Casting (March 1970), p. 131-133
Author: J. H. Schaum

It soon became apparent that the first barrier to computerized control of sand was the inability to reproduce sand tests accurately from test to test--proving out the old adage that one cannot control accurately until one can measure accurately and consistently. Sandology, the science of sand, appears to be far more complex than that of metallurgy in that the following tests must be made daily in order to control sand to metallurgy in that the following tests must be made daily in order to control sand to rigid performance: moisture, compactability, permeability, green compression strength, splitting strength and percent clay as measured with methylene blue. The AFS clay content, AFS grain fineness, combustibles and volatiles should be checked at least weekly. The greatest problem in sand control is being able to relate the interaction of these various sand properties when considered as a total concept. The computer has the ability to deal simultaneously with these variables in a molding sand mix. Here is how it works. Stored in the memory bank of a time sharing computer is a large mass of comparative data that directly applies to all foundry sand operations. This is the basic mix formulations and the structural properties which best suit their particular operations. A central computer control center is used to store all this data and made available on a time sharing basis. A remote keyboard terminal is located at each foundry using the system.



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