FIELD: metallurgy.
SUBSTANCE: method includes manufacture of the model in the mould by filling the mould with preliminary foamed expandable polystyrene raw beads with diameter 3-5 mm and layer thickness of 8-10 mm; the subsequent addition of modifying or alloying additives layer on the top in the form of the grains, dust, powder or pieces with thickness 1-2 mm and final foaming of expanded polystyrene raw beads to produce the model; model assembling in the model unit, painting of the unit with the antistick coating, drying, placing of the model unit in the moulding box, its filling with the support material, sealing, vacuuming and pouring of the metal.
EFFECT: method allows to manufacture the models from expanded polystyrene raw beads in moulds with uniform or gradient content and distribution of the modifying and alloying additives.
4 cl, 3 ex
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