The new investigation method of a permeability of ceramic moulds applied
in the investment casting technology, is presented in the paper.
Some concepts of performing permeability measurements are shown.
Investigations in which the influence of the solid phase fraction in
the liquid ceramic moulding sand (LCMS) on a permeability of a multi-layer
ceramic mould were performed and discussed. The
permeability was estimated during two the most important stages of the
technological process: in the first – after wax melting and in the
second – after mould annealing. Also an influence of the matrix grain sizes
(material for sprinkling) on a ceramic mould permeability was
estimated.