METHOD OF PREPARING SANDS IN PRODUCTION OF THIN-WALLED CASTINGS IN SAND-CLAY MOULDS

摘要

the invention u043eu0442u043du043eu0441u0438u0442u0441u00a0 to u043bu0438u0442u0435u0439u043du043eu043cu0443 production, in particular to technology u043fu043eu043bu0443u0447u0435u043du0438u00a0 castings of u043cu0430u0440u0433u0430u043du0446u043eu0432u0438u0441u0442u044bu0445 steels. the purpose of u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u00a0 - improving the stability properties of the mixture and the quality of castings. freshening up the sand clay mixtures u043eu0441u0443u0449u0435u0441u0442u0432u043bu00a0u0435u0442u0441u00a0 u0442u0435u0440u043cu043eu043eu0431u0440u0430u0431u043eu0442u0430u043du043du044bu043c in 400...900u0441 filler with a period equal to ni = [2.2 + 0.02 (ti - 1420) i], where ni is the number of revolutions u0441u043cu0435u0441 and;ti - u043du0430u0447u0430u043bu044cu043du0430u00a0 temperature metal to reseal,;mi is the mass of the castings.;and in a quantity equal to ai =.... (90 - ni, ni is the number of (mass) u043eu0441u0432u0435u0436u0435u043du0438u00a0, kg. u0440u0435u0430u043bu0438u0437u0430u0446u0438u00a0 u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u00a0 further u043fu043eu0437u0432u043eu043bu00a0u0435u0442 save raw and u0448u0438u0445u0442u043eu0432u044bu0435 materials.