Z. Żółkiewicz, A. Karwiński

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Summary. In the full mould process, the polystyrene pattern which fi lls the mould cavity is subjected to pouring of this mould with liquid metal to the effect of high temperature (1600 0C) and passes from the solid state into liquid and gas. During this process some solid and gaseous products of the thermal destruction of the pattern are created. The kinetics of this process depends on the temperature of evaporation and, though to a smaller extent, on the pattern density, which, combined with the mould parameters, parameters of a ceramic coating, i.e. its thickness, permeability, and resistance to the effect of high temperatures, parameters of a granular material fi lling the mould and parameters of a technological process, including the technique of pouring and design. The mould cavity is fi lled with a pattern made of foamed polystyrene which on pouring of mould with liquid metal undergoes total destruction.

Key words: Evaporative pattern technology, casting, pattern, pattern made of foamed polystyrene, ferrous alloys

"2012 vol.1 No. 2"

an international quarterly journal on economics of technology and modelling processes