SWIRLING PREVENTING TYPE MOLD SPRUE AND CASTING METHOD

摘要

PROBLEM TO BE SOLVED: To prevent the generation of swirling of molten metal in a sprue even in the case of being non-matching state between the sprue and a pouring vessel by composing the sprue of a wall part forming the sprue part of free molten metal from the pouring vessel and a lower opening part pouring the molten metal into a mold and arranging plural swirling preventing ribs parted the peripheral direction around the peripheral edge part of the sprue part on the wall part and extended toward the lower opening part. SOLUTION: The conical sprue 30 is composed of the wall part 30a forming a lower contracted receiving part 31 for receiving the free molten steel flow poured from the pouring vessel and the lower conical hole 30b, with which the molten metal can be made flow into a shell mold from the sprue through the wall part. The sprue wall part 30a forms the smooth edge part 30c continued with the uppermost part and plural swirling preventing ribs reinducing or deviating the free molten metal flow toward the center of the receiving part 31 and thus, parting in the peripheral direction around the peripheral edge part of the receiving part 31 in the state reducing the generation of the swirling of the molten metal and extended toward the lower opening part.