Аннотация
The possibility of using models of complex composition in the technology of casting according to gasified models was studied. Mathematical planning of the experiment was carried out in order to determine the optimal ratio between foundry and building polystyrene foam. Experiments were carried out to determine the dependence of the roughness of the casting on the composition of the model and the thickness of the non-stick coating, as well as the dependence of the gas permeability of the model on the thickness of the non-stick coating. Studied the behavior of expanded polystyrene at different temperatures and exposure time. The composition of the models was chosen, consisting of 60% foundry and 40% building polystyrene foam.