Method and system for improving fired mold precision casting formwork surface layer quality and medium

Abstract

The invention provides a method and system for improving the fired mold precision casting formwork surface layer quality and a medium. The method comprises the steps of 1, cleaning the surface of a waxy mold before a formwork surface layer is prepared on the surface of the waxy film; 2, before the formwork surface layer is prepared, adding a surface wetting agent into formwork surface layer slurry, and performing stirring to be uniform; 3, immersing the waxy mold into the formwork surface layer slurry with the inclination angle of 45 degrees; 4, taking out the waxy mold, and pouring sand; 5, determining whether or not the surface of the waxy mold and an inner cavity are completely covered with casting sand. The casting surface quality is improved, internal inclusions are reduced, and the method can be used for manufacturing precision casting formwork surface layers of various alloys. The method can be used for waxy mold cleaning and formwork surface layer preparation procedures for precision casting of various fired molds such as low-temperature wax and medium-temperature wax.

Description

technical field [0001] The invention relates to the field of investment precision casting, in particular to a method, system and medium for improving the quality of the shell surface layer of investment precision casting. Background technique [0002] The outline size of the overall wax mold for large complex thin-walled precision castings often exceeds 1m, and there are often complex structures such as numerous bosses and cavities. Therefore, when using wax molds to make shells, the uniformity of surface slurry coating Very difficult. [0003] The problem caused by uneven coating on the surface of the wax pattern is that the surface layer of the mold shell is uneven or even leaked, which eventually makes the surface roughness of the casting, and it is easy to increase the inclusions inside the casting due to the peeling off of the surface layer mold shell. Therefore, improving the slurry coatability of the mold shell surface layer on the surface of the wax pattern is an im...

AI Technical Summary

Problems solved by technology

[0004] The existing technical means mainly use ethers such as propylene glycol methyl ether to clean the wax mold, which often cannot completely clean the surface and inner cavity of the wax mold, nor can it ensure sufficient contact between the surface layer slurry and the wax mold and its own protection. Dense, as a result, it is difficult for the surface layer of the mold shell to adhere closely to the surface of the wax pattern, making the surface ceramic layer peel off in the process of subsequent dewaxing or casting metal

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