Fired mold shell manufacturing process using coating transferring method

Abstract

The invention discloses a fired mold shell manufacturing process using a coating transferring method. The manufacturing process particularly comprises the process steps that a release agent is pouredon a cotton gauze, and the release agent is slightly coated to the surface of a wax pattern with the cotton gauze; after the release agent on the surface of the wax pattern forms a film, the wax pattern slowly immerses into transferred coating, slow rotation is carried out until a layer of transferred coating is evenly attached to the surface of the wax pattern, the wax pattern is taken out, and even coating is carried out with a hairbrush; quartz sand is scattered to the surface of the coated wax pattern, the quartz sand is scattered to the surface of the wax pattern after the coating does not drop downwards, and then the wax pattern is soaked into a hardening agent to be hardened; after hardening, the wax pattern is taken out to be subject to air drying, the wax pattern is placed into aboric acid solution to be boiled until the wax pattern in a sand mold shell is completely fused and discharged, the sand mold shell is obtained, then roasting is carried out, and a sand mold die is obtained. According to the fired mold shell manufacturing process, the boric acid solution is adopted for boiling and demolding the sand pattern, quick wax dissolving can be achieved, meanwhile, the dissolving capacity of the transferred coating is weak, and coating anti-falling dissolving while demolding can be achieved.

Description

technical field [0001] The invention belongs to the field of precision castings and relates to a process for preparing investment mold shells using a coating transfer method. Background technique [0002] The transfer coating method is also called non-occupancy coating technology. This process can make the sand casting production gradually achieve the appearance quality similar to that of precision casting castings. It is a brand-new development direction of technology, but it is still difficult to popularize it in production practice on a large scale at present, due to the difficulty of mold release, coating sticking, solvent transfer and other problems. Contents of the invention [0003] The purpose of the present invention is to provide a preparation process for investment mold shells using the paint transfer method. The process boils the prepared wax patterns in boric acid solution, which can effectively remove the wax patterns in the sand shells. At the same time, due...

AI Technical Summary

Problems solved by technology

[0002] The transfer coating method is also called non-occupancy coating technology. This process can make the sand casting production gradually achieve the appearance quality similar to that of precision casting castings. It is a new development direction of technology, but it is still difficult to promote it on a large scale in production practice, due to the difficulty of mold release, coating sticking, solvent transfer and other problems