| 摘要 |
A casting apparatus for producing a casting by pouring a metal melt into a gas-permeable casting mold by gravity, comprising: a gas-permeable casting mold comprising a cavity including a sprue composed of a tubular portion and a cup portion having a larger diameter than that of the tubular portion to receive the metal melt, a runner constituting a flow path of the metal melt supplied through the sprue, and a product-forming cavity to be filled with the metal melt sent through the runner; a means for pouring the metal melt into the sprue by gravity; a gas-blowing unit comprising a gas-ejecting member to be connected to the sprue; and a mechanism for moving the gas-ejecting member; the gas-ejecting-member-moving mechanism placing the gas-ejecting member at a position just above the tubular portion and not interfering with gravity pouring of the metal melt, and moving it downward for connection to the tubular portion; the gas-blowing unit having blowing a gas to fill the product-forming cavity with the metal melt. A casting device used to obtain a cast article by gravity casting of molten metal into a porous mold, said casting device having: a porous mold having, as a cavity, at least a sprue part comprising an introduction pipe portion and a sprue cup portion which has a larger diameter than the introduction pipe portion and which receives the molten metal, a runner part forming a flow path for the molten metal supplied from the sprue part, and a product formation part which is filled with molten metal via the runner part; a pouring device capable of gravity-pouring molten metal into the sprue part; a gas-feeding device equipped with a gas discharge part capable of being connected to the sprue part; and a gas discharge part moving device capable of moving the gas discharge part. The gas discharge part moving device lowers the gas discharge part, which had been arranged at a position that is directly above the introduction pipe portion and does not obstruct the gravity-pouring of the molten metal, so as to connect the gas discharge part to the introduction pipe portion. The gas-feeding device feeds a gas so as to fill the product formation part with the molten metal. |
