FIELD: metallurgy. SUBSTANCE: mould has a working chamber formed by cooled bush 2 and core 4 with channels 5 located at a distance S from the bush. Bush 2 and core 4 are made from a heat-conducting material of a certain hardness. The ratio between the distance from the core channels to the bush and the minimum size of the working cavity of the mould is 0.1-0.3, and the bush material hardness is larger than that of the core by a factor of 3-9 at constant initial heat-conductivity. EFFECT: improved structure. 2
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