BOTTOM RUNNER WITH ROUND SECTION OF CHANNEL FOR FEEDING METAL Russian patent published in 1995 - IPC

FIELD: casting of metals. SUBSTANCE: end pipe and nozzle channels of standard type have expansions at the point of their connection. Expansions may have the form of bevels or any other one. Their max diameter is 1,3 1,5 diameter of bottom runner channel. Their height ranges within broad limits. Height range in the end pipe is approximately 0,1 0,3 diameter of bottom runner channel. Height range in the nozzle is 0,1 1,0 diameter of bottom runner channel. EFFECT: enhanced efficiency. 2 cl, 6 dwg, 1 tbl