Casting pressurizing device, casting pressurizing system and casting pressurizing method

Abstract

The invention discloses a casting pressurizing device which is used for pressing molten metal in a pouring system after the molten metal is poured. The casting pressurizing device comprises a pressurizing cover and a pressure pipeline, one end of the pressurizing cover is provided with a sealing connection portion connected with a pouring cup of the pouring system, and the pressure pipeline is connected with a compressed air source and hermetically communicated with the other end of the pressurizing cover. Compared with traditional gravity sand mold or metal mold casting, the casting pressurizing device has the advantages that the molten metal in a casting mold can be pressed, each portion of the molten metal in the casting mold has positive pressure, the molten metal is solidified under the pressure, the mold-filling capacity of the molten metal and compactness of a casting are improved, the defects such as short run, cold shut, shrinkage porosity and shrinkage cavity of the casting are decreased, and the yield of the casting is improved. The invention further discloses a casting pressurizing system with the casting pressurizing device and a casting pressurizing method adopting the casting pressurizing device.

Description

technical field [0001] The invention relates to the technical field of casting equipment, more specifically, to a casting pressurization device, a casting pressurization system and a casting pressurization method. Background technique [0002] Casting filling refers to the process of filling the molten alloy liquid into the casting cavity through a certain flow channel during the casting process. In the casting process of thin-walled castings, it is usually difficult to fill the mold with alloy liquid, which leads to defects such as insufficient pouring and cold shut in the final casting, and the casting is scrapped. For alloys with large shrinkage tendency and mushy solidification, feeding difficulties often exist during the casting process, resulting in defects such as shrinkage cavities and shrinkage porosity in castings. [0003] The above two situations greatly reduce the yield of castings. For light alloys, the currently known high-pressure, low-pressure, and differe...

AI Technical Summary

Problems solved by technology

[0006] This patent can achieve pressurization of molten metal to a certain extent, but this pressurization method exposes the upper surface of the mold to the pressure, which is opposite to the filling direction and acts as a counter pressure, which is not conducive to the alloy liquid filling

In addition, because this method uses a special sand box, it is necessary to put the pre-made sand mold into the special sand box. For mass production, a large number of special sand boxes are needed, which not only costs a lot, but also complicates the process.

[0007] Therefore, how to avoid the drawbacks that the upper surface of the mold is also exposed to the pressure, which is not conducive to the filling of the molten metal there, has become a technical problem to be solved urgently by those skilled in the art.

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