Tilt type gravity molding device

Abstract

To eliminate the need for a riser and for reduction in tilt speed and to enable molten metal contained in a mold to be pressurized by gas appropriately, a tilt type gravity molding device including a mold which can tilt between a fallen position and a standing position raised approximately 90 degrees from the fallen position, a pouring gate mold in which a pouring gate guiding the molten metal to a cavity of a molded article is formed, and a bowl-like member which stores the molten metal and pours the molten metal into the pouring gate in accordance with tilt of the mold includes closing means which is provided between the pouring gate and the cavity and can open and close the pouring gate, a gas inlet 9 which is provided at an upper portion of the mold at the standing position, prevents the molten metal from flowing out of the mold, and allows only gas to pass therethrough, and gas supplying means which allows high-pressure gas to be supplied to the gas inlet.

1 . A tilt type gravity molding device comprising:
 a mold which forms a cavity forming a molded article and tilts between a fallen position and a standing position raised approximately 90 degrees from the fallen position;   a pouring gate mold in which a pouring gate guiding molten metal to the cavity is formed;   a bowl-like member which stores the molten metal and pours the molten metal into the pouring gate in accordance with the tilt of the mold;   closing means which is provided between the pouring gate and the cavity of the mold and can open and close the pouring gate;   a gas inlet which is provided at an upper portion of the mold at the standing position and has a gas valve preventing the molten metal from flowing out of the mold and allowing gas to pass therethrough; and   gas supplying means which allows high-pressure gas to be supplied to the gas inlet.   
     
     
         2 . The tilt type gravity molding device according to  claim 1 , further comprising cooling means which can cool the mold. 
     
     
         3 . The tilt type gravity molding device according to  claim 1 , wherein a plurality of gas inlets, each of which is identical with the gas inlet, are provided at regular intervals from one another. 
     
     
         4 . The tilt type gravity molding device according to  claim 1 , wherein the molded article is a tire wheel. 
     
     
         5 . The tilt type gravity molding device according to  claim 1 , wherein the pouring gate is divided at least into plural pieces.