Anti-deformation embedded block and mold shell forming method with flat bottom plate

Abstract

The invention discloses an anti-deformation embedded block and a forming method for a mold case with a flat bottom plate. The anti-deformation embedded block used for forming a wax mold bottom plate of a single crystal directional vane module comprises a round plate with a flat outer surface, and the round plate is used for being embedded in a wax mold bottom plate forming mold to form a flat forming surface of the wax mold bottom plate. A flowing hole which is throughout a plate body of the round plate and used for mutual flowing of wax materials in an upper cavity and a lower cavity of the round plate and deformation resistance in the solidification process of the wax materials is formed in the round plate. The round plate is further provided with a positioning part used for positioning the round plate when the round plate is embedded in the wax mold bottom plate forming mold. The deformation of the wax mold in the solidification process of the wax materials can be effectively inhibited, deformation of the wax mold caused by surface tension of slurry in the case making process can also be inhibited, and the anti-deformation embedded block and the forming method for the mold case with the flat bottom plate are suitable for single crystal directional vane investment pattern precision casting of various aero-engines and industrial gas turbines.

Description

technical field [0001] The invention relates to the technical field of investment casting of single crystal oriented blades of aero-engines and industrial gas turbines, in particular, to an anti-deformation embedded block used for forming a wax mold base plate of a single crystal oriented blade module. In addition, the invention also relates to a mold shell forming method with a flat bottom plate of a single crystal oriented blade. Background technique [0002] Aero-engine and industrial gas turbine single crystal directional blade investment casting technology, the directional blade requires the bottom of the mold shell to be hollowed out during the casting process, so that the molten metal can directly contact the water-cooled crystallizing plate, so that the metal can be strongly cooled to build a large Temperature gradient. The fluidity of high-temperature molten metal is very strong, coupled with the effect of large static pressure head, the molten metal is prone to br...

AI Technical Summary

Problems solved by technology

[0003] The invention provides an anti-deformation embedded block for forming a wax mold bottom plate of a single crystal directional blade module and a mold shell molding method with a flat bottom plate of a single crystal directional blade to solve the problem of the precision of the existing single crystal directional blade investment mold. In the casting technology, the mold shell at the bottom of the module is formed by a disc wax mold, and the disc-shaped wax mold is prone to uneven shrinkage and deformation of the wax mold due to its large area, and the wax mold is in the process of coating the shell. Because of the surface tension of the slurry, the deformation of the wax mold will be aggravated, and the bottom plate of the mold shell formed by it is easy to deform; at present, the method of manually polishing the bottom plate mold shell can only be used to ensure the flatness of the bottom, which is not only time-consuming and labor-intensive but also easy The technical problem of causing slag inclusions to enter the formwork from the bottom and causing blade slag inclusion defects

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