Dry Mixes for Casting Manufacturing in Single and Small-Scale Production

Abstract

The paper considers the possibility of using unified dry mixes for machine-building enterprises with small-scale and single-piece production of castings. Dry mixes for production of expendable molds and rods have been developed. Their distinctive feature is that cladded CMC high-silica sand is used as a filler, and powder-like LST are used as a binder. All the ingredients of the mix are products of domestic and Russian production, are not scarce, are not expensive in price, are simple and safe to use. Experimental-industrial tests of the proposed dry mixes were carried out, and a pilot batch of castings was produced in the amount of 5 tons of good casting (small shaped cast-iron casting). Taking into account the specificity of the foundries at enterprises with single-piece and small-scale production, the features of their technical equipment, an engineering solution, focused directly on this segment, has been developed and proposed. The engineering solution relates to the manufacturing processes of casting molds and rods production, and consists in the development of formulations for dry foundry mixes. A distinctive feature of the formulations is: simplicity in use, versatility in functionality, reliance on the domestic resource base, which means that it is affordable, not expensive, and environmentally friendly, safe both for production personnel and for the environment, in the area where the industrial enterprise is located.