METHOD OF FORMING MOLTEN METAL Russian patent published in 1995 - IPC

FIELD: production of blanks. SUBSTANCE: at the stage of shaping the casting in a hollow punch a hydraulic pressure corresponding to the reactive pressure at the surface of the punch is maintained therein. During the solidification, the casting sustains additional pressure in its bulk due to an increase in the hydraulic pressure inside the punch to a level when the punch walls deform radially and axially within the elastic limit, said pressure being maintained until the end of solidification. EFFECT: improved quality of castings. 1 cl, 1 dwg