No,Shell Mold Casting and investment casting (lost wax casting) are two different casting processes.
Although they both belong to the category of precision casting, there are significant differences in process principles, materials and applications:
Difference in process principles
Investment casting (lost wax casting):
Use fusible materials (such as wax or foam plastics) to make a prototype, and wrap the surface with multiple layers of refractory materials to form a shell. After heating, the prototype is melted away to obtain a casting without a parting surface, and then the molten metal is poured. Its core features are “investment mold” and “no parting surface”.
Shell casting:
By heating and solidifying the coated sand (resin sand) on the metal template, a thin shell-shaped casting mold (usually a combination of two half shell molds) is formed. There is no need to melt the prototype, and the molten metal is directly poured. Its core is “coated sand shell mold” and “parting surface combination”.
Differences in materials and processes
The mold material of investment casting is wax or polystyrene, which needs to be coated with refractory coating multiple times and baked at high temperature;
Shell casting uses resin sand, which is quickly formed by heating, and the process is simpler.
Application scenarios
Investment casting is suitable for high-precision, complex small parts (such as turbine blades);
Shell casting is mostly used for medium-precision, large-volume small and medium-sized castings (such as gears and valves).
Of course, although both belong to precision casting, shell casting is not an alias or subcategory of investment casting, but an independent process branch. If you need large-scale casting needs, you can choose to cooperate with Mulan Metal. Mulan Metal has 12 years of custom casting experience, customers in more than 30 countries, and complete certificates to meet the needs of customers in different countries.
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