Wax mold molding method with ceramic core

Abstract

The invention discloses a method for forming a wax mold with a ceramic core. The design structure of the wax mold and the ceramic core is determined according to the designed casting. The inspection reference point is determined on the ceramic core, so that the designed casting and the inspection reference point on the ceramic core are mapped to each other; the ceramic core is manufactured according to the design structure, and the inspection reference point determined on the ceramic core is used as a supporting point. Use positioning pins to clamp the ceramic core in the wax mold; inject wax liquid into the cavity of the wax mold until the wax mold is formed, remove the positioning pins on the wax mold, and fill the positioning holes on the wax mold. The invention effectively improves the clamping and positioning accuracy of the ceramic core in the wax mold, enables the molded wax mold with the ceramic core to have good molding quality, effectively controls the reject rate, improves the qualification rate, and has good economical efficiency.

Description

technical field [0001] The invention relates to mold forming technology, in particular to a wax mold forming method with a ceramic core. Background technique [0002] In the investment casting process of castings, lost wax investment casting is a common process measure; for hollow castings, the key basic technology of lost wax investment casting is to design and manufacture matching wax molds with ceramic cores. There are many hollow castings. Now take the precision casting process of the hollow blade of the heavy-duty gas turbine turbine stage as an example to describe it in detail. [0003] The hollow blades of the turbine stage of the heavy-duty gas turbine are all manufactured by the lost wax precision casting process. The specific technical measures are: first, according to the designed hollow blade castings, manufacture high-temperature resistant ceramics that are similar in shape and size to the air-cooling channels of the hollow blade castings core; secondly, the ce...

AI Technical Summary

Problems solved by technology

In this technical measure, when the wax mold is formed, the clamping and positioning of the ceramic core in the wax mold is realized through the process section of the ceramic core, because the process section of the ceramic core is very easy to Deformation occurs, so that the clamping and positioning of the deformed part cannot be objectively guaranteed, which usually leads to low clamping and positioning accuracy of the ceramic core in the wax mold; in the industry, in order to improve the low structural accuracy of the process section The problems existing in the clamping and positioning of the ceramic core are usually wrapped with wax paper in the process section of the ceramic core, so that the ceramic core forms a flexible positioning in the wax mold. This technical measure cannot effectively solve the problem of the ceramic core in the wax mold. The problem of low positioning accuracy in the wax mold makes the molded wax mold unable to meet the design technical requirements, high scrap rate and poor economy

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