METHOD FOR MAKING MOLDS Russian patent published in 1994 - IPC

FIELD: production of molds. SUBSTANCE: method involves in layers application to flexible mold of a mixture of dispersed metal powders in aqueous solution of macromolecular compounds, density 0.06/-10.0 Pa. s. Relation of volumetric fraction of macromolecular compound solutions in suspension to volume of cavities between metal powder particles after shaking down shall not be more than 1.6 and less than 1.2. After applying suspension layers to required thickness, mold is taken out and produced blank is heat-treated in reducing atmosphere. To ensure required accuracy of reproduced relief and surface finish of articles, average dimensions of metal powder particles are limited in accordance with mathematical dependence of particle roughness upon their size. EFFECT: higher efficiency. 3 cl, 3 tbl