Repairing method for assembly and splicing of split wax molds in investment casting process

Abstract

The invention discloses a repairing method for assembly and splicing of split wax molds in the investment casting process, which comprises the steps as follows: premelting liquid wax (2); after splicing the wax molds, drawing the liquid wax (2) with a rubber head dropper (1) to drop at a binding part; rotating the wax molds to allow the liquid wax to flow along a binding surface; and allowing the liquid wax (2) to permeate into a splicing part gap (3) when the liquid wax (2) encounters the splicing part gap (3), so as to be filled in the splicing part gap (3). The repairing method is simple in operation and practical, and can be used for repairing the wax molds with narrower inner cavities. For casts in complicated structures, split molds can be used for manufacturing the wax molds, so that the mold making cost can be lowered.

Description

technical field [0001] The invention belongs to the technical field of investment casting, and in particular relates to a repair method for combined splicing of split wax patterns. Background technique [0002] In the process of investment casting, the combined splicing of split wax patterns is more common, that is, more than two split wax patterns are spliced ​​to form a whole wax pattern. In the actual production process, due to the self-shrinkage of each split wax pattern, As well as the deviation in mold manufacturing, the shape of the joint part is different from the theoretical shape. When splicing the wax mold, there are more or less certain gaps on the joint surface of the joint part; The "gap" in the wax pattern splicing is not repaired, resulting in the "gap" of the casting and being scrapped. For the "gap" of splicing wax models and the cracks of wax models, the most commonly used method at present is to brush or smear wax paste, but for wax models with narrow in...

AI Technical Summary

Problems solved by technology

[0002] In the process of investment casting, the combined splicing of split wax patterns is more common, that is, more than two split wax patterns are spliced ​​to form a whole wax pattern. In the actual production process, due to the self-shrinkage of each split wax pattern, As well as the deviation in mold manufacturing, the shape of the joint part is different from the theoretical shape. When splicing the wax mold, there are more or less certain gaps on the joint surface of the joint part; The "gap" in the splicing of the wax pattern is not repaired, resulting in the "gap" of the casting and being scrapped

For the "gap" of splicing wax models and the cracks of wax models, the most commonly used method at present is to brush or smear wax paste, but for wax models with narrow inner cavities, this method is inconvenient or impossible to operate. The adhesion between the paste and the wax pattern is small, and it is easy to cause cracks in the subsequent operation process, resulting in "gap" in the casting

Images