The lost wax casting of heat-resistant customized castings includes two types, solid molding and ceramic shell molding. The latter is an improved method of the former. For the production of the ceramic shell molding, is like the solid mold method, only after a slurry dipping and sand sprinkling(or floating sand), and do not carry out the packet modulo, but repeatedly do the slurry dipping and sand sprinkling until the desired thickness of the shell is obtained.
When the heat-resistant customized casting in casting, drying, heating, melting out wax, heating at high temperature after pouring. Process can be local automation, in this way, it can save manpower, improve production rate and the production cost is also very low.
Ceramic shell mold is thinner, after pouring, the cooling rate of heat-resistant customized casting is relatively high and uniform. It is because of this, the mechanical properties will be better and the dimensional stability performance is also better.
When casting the workpiece, we need to bake the casting mold first, remove the water vapor and prevent the explosion from splashing by increasing the mold temperature. Baking will use a blow lamp or red iron to operate, to prepare for the drying of the paint. Pay attention to cleaning the casting mold, push the asbestos pad, lock its front cover, and put the nozzle on.
After the pouring of the heat resistant customized casting is finished, in order to get the refined grain structure, there is proper water spray cooling. Pay attention to the temperature and time control, to avoid affecting the thickness of the paint. It should also pay attention to maintaining related safety performance when operating.