Experimental Study on Effect of Sand Grain Size and Heat Dissipation on the Properties of Moulding Sand

Abstract

The rate of heat dissipation affects the solidification of the casting. A controlled cooling rate is necessary to produce defect-free castings. Sand qualities such as green compression strength, permeability, flow ability, mould hardness, and compactibility play a key role in controlled cooling or uniform heat flow across the casting. A research is executed in this paper to see how these properties affect the heat dissipation rate. The coarse grain and fine grain sand particle sizes are the most important influencing elements. The solidification time for casting in coarse, medium, and fine grains was noted in the results, and it was discovered that the cooling rate is better for coarse sand grains, as well as a relationship between solidification time and sand qualities was developed. During the experimental results it was observed that highest value of compactability was found to be 72% in case of medium sand, highest value of flowability was found out to be 87% in case of medium sand and highest value of permeability number was found in case of course sand particles i.e. 471.