Splicing method for splicing multiple mold core loosen pieces to form annular mold core

Abstract

The invention provides a splicing method for splicing multiple mold core loose pieces to form an annular mold core. The splicing method comprises the steps of providing a splicing disc, wherein a closed annular positioning ring is arranged on the splicing disc, a plurality of limiting clamping grooves are formed in the positioning ring, the number of the limiting clamping grooves is equal to the number of the mold core loose pieces, and the contour of the inner wall of each limiting clamping groove corresponds to part of the contour of the surface of each mold core loose piece one by one; firstly, sleeving the mold core loose pieces in the limiting clamping grooves correspondingly one by one; bonding the two adjacent core loose pieces together by using an adhesive; and after the adhesive is coagulated, splicing the mold core loose pieces to form the annular mold core. By adopting the technical scheme, the accurate positioning of the multiple mold core loose pieces is achieved through the splicing disc, so that the positioning error is reduced, and the bonding quality of the annular mold core is improved; and by using the adhesive containing bauxite and silica sol raw materials, compared with the prior art, the coagulating time is shortened, the bonding strength is improved, and the bonding quality of the annular mold core is guaranteed..

Description

technical field [0001] The invention relates to the technical field of casting technology, in particular to a splicing method for splicing several core loose blocks to form an annular core. Background technique [0002] In the investment casting process, ceramic cores are usually used to form the cavity of castings with complex shapes or difficult to form, as a special process method to simplify the difficulty of the process, reduce the cost and improve the qualified rate of castings. Some annular castings need to be placed with annular ceramic cores. Due to the characteristics of brittle and hard ceramic cores, it is difficult for thin-walled annular ceramic cores to be molded as a whole, and they are easy to break during the process. Therefore, the ceramic cores need to be separated Make several core blocks, and then splice these core blocks into annular ceramic cores. In the prior art, liquid glue is usually used for the splicing of annular ceramic cores. However, the exi...

AI Technical Summary

Problems solved by technology

Some annular castings need to be placed with annular ceramic cores. Due to the characteristics of brittle and hard ceramic cores, it is difficult for thin-walled annular ceramic cores to be molded as a whole, and they are easy to break during the process. Therefore, the ceramic cores need to be separated Make several core blocks, and then splice these core blocks into annular ceramic cores. In the prior art, liquid glue is usually used for the splicing of annular ceramic cores. However, the existing liquid glue generally does not have High temperature resistance, limited bonding strength, and during the bonding process, each core block is not positioned in space, which is likely to cause large errors in the joint surface, affecting the bonding quality of the finished annular ceramic core, and once the ring The bonding quality of the ceramic core is defective, which will make it difficult to release the casting after molding

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