Casting method of mold core of casting mold

Abstract

The invention discloses a casting method of a mold core of a casting mold. The method comprises the following steps: firstly, assembling and sealing a mould, and pouring liquid (water) from an inlet of the mould and then putting a sealing plug containing a water drainage conduit at a water filling hole; secondly, putting the mould in a sealed environment which has a designated cooling and heat insulation effect and is in a relatively-sealed condition; condensing the mould in the airtight environment and forming an ice body; then taking an obtained ice core out of the mould and putting into a designated environment for storage and later use; and finally, assembling the ice core into the mould, and performing wax injection, cooling and melting of the mold core to obtain a wax mould having arequired mold cavity. According to the process disclosed by the invention, environmental pollution is eliminated, a production period is shortened, waste of resources is avoided, a site working environment is improved, the problem of wax saponification is solved, and the quality stability of casting pieces is improved.

Description

technical field [0001] The invention mainly relates to the field of precision casting water-soluble cores, in particular to a method for replacing traditional urea cores and water-soluble wax cores. Background technique [0002] Existing methods for forming the inner cavity of precision casting wax molds include: metal core pulling (block core pulling and insert core pulling) Huff mold, urea core, water-soluble wax core, etc.; wherein, urea core and water-soluble wax core belong to water-soluble Sexual core; urea core and water-soluble wax overcome the disadvantage of complex inner cavity that cannot be core-pulled and take molds, and at the same time avoid inner cavity repair, and can make products with more complex shapes; but the biggest problem at present is: when making urea core, At 150°C, ammonia gas will be decomposed, which will pollute the environment and corrode the mold; urea will dissolve through water, if it is directly discharged, it will cause great environme...

AI Technical Summary

Problems solved by technology

[0002] Existing methods for forming the inner cavity of precision casting wax molds include: metal core pulling (block core pulling and insert core pulling) Huff mold, urea core, water-soluble wax core, etc.; wherein, urea core and water-soluble wax core belong to water-soluble Sexual core; urea core and water-soluble wax overcome the disadvantage of complex inner cavity that cannot be core-pulled and take molds, and at the same time avoid inner cavity repair, and can make products with more complex shapes; but the biggest problem at present is: when making urea core, At 150°C, ammonia gas will be decomposed, which will pollute the environment and corrode the mold; urea will dissolve through water, if it is directly discharged, it will cause great environmental pollution, and the cost of recycling and disposal will be too high, and the process of wax mold dissolution will be formed due to contact with the surface of the solution. Saponified wax affects the surface quality of the wax model and the performance of the wax; although the pollutant discharge of water-soluble wax is relatively small, it is particularly difficult to dissolve (generally, the urea core dissolves in a few minutes to tens of minutes, while the water-soluble wax takes several hours to dissolve. Even for a few days, during the period, the solubility of the solution decreases with the passage of time, and it needs to be adjusted) the time is too long, the manufacturing cost is high, and the cycle is long; during the dissolution process, the solution will also have a saponification reaction on the wax