Summary
-Desktop 3D printing is a rapidly developing industry, but metal printing still relies on expensive laser technology, putting it out of reach of most consumers.
- However, Rapidia’s cast-to-sinter method offers a cheaper alternative, using a tech reminiscent of lost-wax casting to 3D-print ceramic or metal objects.
- The process involves printing the model with resin, then using the print to create a mould out of silicone rubber.
- The mould is then filled with a mixture of metal powder and a water-based binder, and the block frozen at -40C.
- This results in a composite stronger than pure ice, and the mould is removed, with the frozen part then freeze-dried and treated in a vacuum sintering oven to give the final product.
- While the method offers high-resolution prints, the most expensive element is the vacuum sintering furnace, with a cheaper ceramic sintering oven working better for ceramic-only prints.