FIELD: foundry.
SUBSTANCE: invention relates to foundry. Device for making a hollow lost-wax model comprises mould (1) with cavity and steel punch (2). Punch installed with possibility of movement in mould cavity contains guide (3) and deforming (5) sections and stroke limiter. Guide section (3) is made so that to ensure adjoining to opposite part (4) of the mould cavity surface. Punch deforming section surface comprises a thermal circuit providing controlled heating of the model material to the melting temperature, which allows melting the layer of model material adjacent to the deforming section of the punch when it is removed from the lost-wax model.
EFFECT: removal of the punch from formed lost-wax model without distortion of its geometry.
1 cl, 2 dwg, 1 ex
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