Abstract: Whole kernel corn is ground and sifted to separate a coarse particle fraction which is then heated with lime and water to a temperature of at least 71.degree. C. and below 100.degree. C., preferably about 99.degree. C. or less, for up to about 15 minutes. A fine particle fraction from the sifting step can be combined with the heat treated coarse fraction. The resulting heat treated mixture is then dried under a vacuum while continuously mixing for at least about 20 minutes to obtain a dried masa flour having a moisture content of about 7% to about 12% by weight. Thereafter, the dried masa flour can be ground while maintaining the temperature below the gelatinization temperature to reduce the particle size of the masa flour without further gelatinization.

Abstract: In the production of foundry mold parts by the method described in U.S. Pat. No. 3,739,834, the production rate is increased by employing a foundry sand mix which can be cured by means of a gaseous curing agent and carrying out curing of the pressed mold part while the mold part is supported at the pressing station.

Abstract: Apparatus for continuous, high speed production of foundry mould parts by pressing them from a continuous bed of foundry sand mix which is based on a curable binder, pressing of the part being carried out at a time when the mix has adequate plastic flowability for pressure moulding and adequate potential curability to assure a strong, rigid cured product. Advantageous embodiments include curing means operating in conjunction with the pressing means.