METHOD OF MAKING CONSUMABLE PATTERNS WITH COMPLEX SURFACE RELIEF Russian patent published in 1994 - IPC

FIELD: casting production. SUBSTANCE: method comprises steps of pouring a prepared before hand composition on a base of gelatin and glycerin with addition of chalk and water into a flask, containing a master pattern, having a complex relief on its surface; solidifying the composition in atmospheric air and treating a shell mold, had been produced, after removal of the master pattern in a formalin solution over 0,5-1,5 hours; pouring in to the elastic mold, had been produced, the melt composition on a base of dibutyl/phthalate, setting it in air over a time period no less, than 10 hours, after crystallization removing a copy of the master pattern from the elastic mold and pouring into it a melt composition of pattern components, solidifying the composition and removing the master copy from it for producing the consumable pattern. EFFECT: simplified production process. 1 cl, 2 tbl