Design of statistical experiments to optimise the composition of clay-bonded moulding sand mixtures containing organic additives

Abstract

Regression equations relating the response of green compression strength, shatter index and bulk density of moulding sand with variations in amounts of active clay, dead clay, moisture and a chosen organic additive have been developed and reported by the authors in an earlier paper. The usefulness of regression equations in optimizing the composition of the moulding sand to achieve the requisite properties is shown in this paper.Illustrative nomograms have been constructed which give optimal combination of the amounts of active clay and organic additives for known amounts of dead clay and moisture.