LOW PRESSURE DIE CASTING MACHINE CONTROL SYSTEM Russian patent published in 1997 - IPC

FIELD: metallurgy. SUBSTANCE: control system has multiplier with high pressure cavity connected to piston cavities of ingot ejector cylinders. Stem cavities of ingot ejector cylinders are normally communicated with discharge manifold. Each piston and stem cavity of multiplier is connected through respective electrically controlled three-positional distributor with supply and discharge mains. Multiplier may be alternatively started so that ingot ejector cylinders initially undercut die-mold and then eject ingot from mold top. Volume of high pressure cavity of multiplier is equal to half the total volume of working cavities of ingot ejector cylinders. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 2 cl, 2 dwg