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Water-soluble, salt-based cores are used to produce complex casting components in foundry technology and offer numerous advantages compared to conventional sand cores.
Salt cores, or simply cores, are used in foundry technology to manufacture casting components as placeholders for cavities in casting molds. The metallic smelt forms an impression of the component shape and the salt core is flushed out once the component has cooled off. The lost mold technique is applied to the process, forming cavities in metal components. Compared to sand cores, which are commonly used in foundries, salt cores have the advantage that they are guaranteed to be absolutely residue-free. This increases process safety in manufacturing and the quality of the cast component.
The water-soluble salt-based cores in the shape of a ring are used in the conventional pressed disk method of production. The core-shooting process allows for complicated shapes and designs. Cores are manufactured in line with proven ceramic principles and materials are developed on the basis of special salt mixtures. Continuous system advancements already make it possible to use salt cores in die casting today. Moreover, suitable, emission-free, inorganic binder systems are also used.
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