Investment Casting with Salt Cores
Investment casting is used to produce precise components with complex geometries. Salt is an interesting material for this technology. Salt cores are produced by injection casting of molten salt, which produces casting moulds with high mechanical and thermal stability and smooth internal surfaces. The salt core dissolves easily from the part with pressurized water and can be removed without residues. The process is environmentally friendly and the salt core is easily and completely recyclable.
3D Printing of Salt Cores
The method has become more interesting in combination with 3D printing. In early 2022, researcher from ETH in Zurich published an article on “Light-Based Printing of Leachable Salt Molds for Facile Shaping of Complex Structures https://onlinelibrary.wiley.com/doi/10.1002/adma.202203878 The article describes 3D printing of salt molds as a universal, cost-effective, and sustainable new manufacturing method.