Precision casting molding process

Abstract

The invention discloses a precision casting molding process. The molding process steps are as follows: (1) put the wax material into a mixer, heat it to 45-48°C, and stir it into a paste; Insert the two die sleeve holes of the flexible mold sleeve into the flexible mold sleeve, and place the three in the mold cavity of the metal mold, and then make them close the upper and lower molds; (3) put the paste wax Inject into the mold at a pressure of 3.5 atmospheres, respectively pour the wax mold of the casting body and the wax mold of the sprue, and cool at room temperature for 30-60 minutes; (4) Open the upper and lower molds of the metal mold, and place the two The metal column mold is pulled out, the wax mold of the casting body and the gate part are removed from the mold, and then placed in a water pool to cool to 22-27°C, and taken out for later use; (5) The wax mold of the casting body made in step (4) is trimmed, Then, the sprue wax pattern and the casting body wax pattern are bonded together with a hot knife at 150° C. to obtain a casting wax pattern. The technological process is simple and easy to operate, the casting has good compactness, and the overall specification is consistent, the size is stable, the shape and position error is small, and the yield is high.

Description

technical field [0001] The invention belongs to casting technology, in particular to a precision casting forming technology. Background technique [0002] In the production of products, molds have been widely used, especially in the foundry industry. Although the casting process has been greatly developed, it still generally adopts traditional sand mold casting and metal casting, and the disadvantage of this method is that the density of the castings is different, which affects the durability of the castings; the castings processed by the traditional method are different. The structure and specifications of the parts are not the same, the process is complicated, and it is very difficult to repair the welding and grinding of the central part of the processed casting. Contents of the invention [0003] In order to overcome the above-mentioned problems existing in the prior art field, the purpose of the present invention is to provide a precision casting molding process, whi...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above-mentioned problems existing in the prior art field, the object of the present invention is to provide a precision casting molding process, which solves the problems that the existing wax pattern process is complex and the central part of the processed casting is difficult to repair welding and grinding