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Sand casting | Voxeljet
In sand casting 3D printing technology, sand molds are made from fine quartz sand . These are used, for example, for grey and steel casting and for the production of castable metals such as aluminum, brass or magnesium . In addition to prototype or tool production , sand casting molds from the 3D printer are also used for the production of designer furniture, for restorations, in architecture and in the aerospace industry.
THE PROCEDURE
Quartz sand or polymers layer by layer to the mold
Furan Direct Binding (FDB)
Furan direct binding (FDB) is used in the production of the sand molds. The particle material (quartz sand) is applied to the construction surface in thin layers and selectively printed and bonded with binder by a high-resolution print head in accordance with the component data. These work steps are repeated until the desired component height is reached. Unbonded material residues are then removed. Some 3D printers that use the FBD process also use plastic, such as PMMA (polymethyl methacrylate), as a material.
The advantages
- Huge installation spaces: An outstanding advantage of the sand casting 3D printers is their extremely large installation space of up to 4000 x 2000 x 1000 mm. This means that even large casting molds can be produced, for example for turbine housings.
- Sustainability: Another advantage is the ecological sustainability of quartz sand as the material used: this raw material is considered to be available in practically unlimited quantities worldwide.