Blow molding machine of the type which always exposes the top of a core box and a feed mechanism molding sand using the action of depression of the blow head.

摘要

MOLDING BLOW AT THE TOP OF BOX CORES (1) IS ALWAYS OPEN, AND A HEAD BLOWN (6) is pressed against the upper surface of said core box ONLY WHEN THE SAND MOLDING IS BLOWN. MECHANISM FEEDER ARENA HAS A feed tank ARENA (5) COMMUNICATING WITH A FEEDER compressed air through a duct having a valve SUPPLY AND EXPULSION (9) and coupled, via a hose (12) or conduit FIXED HEAD WITH bLOWING communicating with said feeder PNEUMATIC THROUGH A duct having a blow valve (8). The molding sand can be fed automatically HEAD MOLDING TAKING ADVANTAGE OF THE DIFFERENCE OF INTERNAL PRESSURE BETWEEN THE HEAD OF BLOWING AND TANK FEEDING ARENA, without requiring PLACE A HOPPER SAND MOLDING ON TOP CASTING MACHINE.