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The article discusses the technology of casting according to the smelted models, in particular, the processes of manufacturing wax models. We considered methods of manufacturing elements of model blocks with the use of molds and with the help of additive technologies. In this paper we showed the features of the application of additive technologies in the lost-wax casting. A simulation model has been developed to evaluate the effectiveness of using additive wax printing technologies to produce wax models. Based on the results of simulation modeling, conclusions were made about the feasibility of using additive technologies in casting according to smelted models.