FIELD: technological processes.
SUBSTANCE: invention relates to foundry. Shell mold is prepared by layer-by-layer application of the slurry onto the model and sprinkling each layer with a granular material. Mold is dried and cured. Model is melted. Sprinkling of the layers with granular material and drying are combined. Drying is carried out in the layer of the back-up granular material of the substrate under the action of the air pressure gradient. Difference in air pressure above and below the layer of the back-up granular material is created by vacuuming the space under a granular material layer.
EFFECT: provides an improvement in the quality of the shell molds produced.
1 cl, 1 dwg, 1 tbl
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