METHOD FOR MAKING THREE-DIMENSIONAL PRODUCTS OF POWDER COMPOSITION Russian patent published in 2000 - IPC

FIELD: powder metallurgy, namely processes for making complex-shape models with inner cavities. SUBSTANCE: method comprises successive layer by layer arranging of powdered composition in machine tool; treating each layer with laser irradiation and extracting product from machine tool at removing powder composition excess at formation of three-dimensional product; using as powder composition sieved mixtures of metallic powders, for example nickel, chromium, aluminium, ferrum, titanium, brass based powders, with polymeric powders of polycarbonate or polyamide with specific size of metal or polymer particles 20-160 micrometers at ratio (4-12) mass parts of metal containing powder to one mass part of polymeric powder; after extracting product from machine tool and removing powder composition excess, treating product by cementing solution, for example by polyvinyl acetate or silicate base cement and successively drying it. EFFECT: enhanced efficiency. 1 dwg, 2 ex