PURPOSE: To prevent the generation of defects due to gas and soot of a casting in the stage of charging molten metal into flaskless longitudinally split casting molds, by putting a suction box communicating with a vacuum pump on the top surface of the casting molds, sucking the air from the inside of the casting molds and sucking the gas forcibly when the gas are generated in the molds.
CONSTITUTION: Many casting molds 2, 1a, 1kW3 are arrayed horizontally to form product cavities 4aW4g, and a suction box 8 is brought into contact with the top surfaces of the molds 1aW3. The inside of the casting molds is sucked 9 by driving a vacuum pump. While the suction operation is continued, molten metal is charged into a sprue 7 and is fed into the cavity 4a; further the molten metal runs through a common runner 6 and is charged from a gate 5b into the cavity 4b. The molten metal is charged successively into the cavities 4cW4g. The gas generated during this time is sucked away by the suction effect of the box 8; therefore, the generation of the defects due to gas and soot in the casting is prevented.
UNOSAKI NAGATO
KOMORI TOSHINAO
TOYODA SHIGEHIRO
| JPS51109214A | 1976-09-28 | |||
| JPS3912818Y1 |