METHOD OF PRODUCING HIGH-POROSITY CASTS Russian patent published in 2014 - IPC B22D25/00 

FIELD: metallurgy.

SUBSTANCE: water soluble filler is heated in furnace and pouted in heated metal mould. After teeming the metal into the mould, filler is impregnated with the melt on exposure to centrifugal forces. Mould rpm is defined by the formula $$n=\sqrt{\frac{(200÷300)g}{4{\pi }^{2}R}},$$ c^-1, where R is cast revolution radius, m; g is acceleration of gravity, m/s². Cast solidified, filler is removed with the help of running water and ultrasound oscillations applied to the cast.

EFFECT: simplified process, lower labour input, enhanced process performances.

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