Negative pressure updraught pouring device and method
AssigneeMei Ta Industrial Co., Ltd.
InventorYu-San CHEN
Life of this patent
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Abstract
A negative pressure updraught pouring device and method are provided. A melting furnace has a top end covered by a flat plate with a suction pipe that has a bottom end dipped into the molten steel in the melting furnace. A mold is placed on the flat plate and the mold's flow path system is connected with the suction pipe. A chamber is covered on the mold and the flat plate, and the air inside the chamber is drawn out to reduce the air pressure inside the chamber and the mold cavity. When the mold cavity is filled with molten steel, a driving assembly is used to move a blocker to substantially block the flow of the molten steel in the flow path system. The negative air pressure is relieved to flow the molten steel inside the flow path system back into the melting furnace.
Claims10
A negative pressure updraught pouring device provided for a plurality of molds to form a plurality of casts, where each mold has a mold cavity, a flow path system, and an air passage, the mold cavity and the flow path system are connected with each other inside the mold while the air passage is connected with the mold cavity, and each mold is a sand mold and its air passage on the mold is a gap between sand grains of the sand mold;
- a flat plate having a suction pipe is covered onto a top end of a melting furnace;
- the mold is placed on the flat plate, and the flow path system of the mold is connected with a top end of the suction pipe;
- a chamber is connected with an extraction device and is placed over the mold and the flat plate to draw the air inside the chamber out;
- the negative pressure updraught pouring device is characterized in that:
- a blocker is provided within the mold, where the blocker has one end provided with a driving assembly for driving the blocker so as to move another end of the blocker to block substantially the flow path system in the mold.
Dependencies are inferred from the claim text.