SAND SLINGER APPARATUS Russian patent published in 2003 - IPC

FIELD: foundry, metallurgy, possibly manufacture of casting molds and lining of metallurgical vessels. SUBSTANCE: sand slinger apparatus includes housing, loading hopper, two rotors arranged one inside another. Rotors are rotated by means of common drive unit; their rotation axes are mutually shifted. Cylindrical slide valve of pneumatic pulse head includes two pipes with slits parallel relative to their common axis. Said pipes are joined by their cone surfaces with possibility of mutually opposite rotation by means of common drive unit. It provides quick increase of pressure over working chamber and quick closing of slide valve after block of molding sand leaves guiding branch pipe. EFFECT: lowered consumption of compressed air, increased kinetic energy of molding sand block, enhanced degree of compaction of casting molds and lining of metallurgical vessels. 4 dwg