3D printers commonly use materials that have low deformation temperatures to make printing with these materials easier. This is problematic if you need to thermally sterilize a 3D printed part. The solution is to use a heat-resistant material with a high-temperature 3D printer… generally with a price tag over $25k.
Enter the Cerebus High Temperature 3D printer, detailed in a pre-print by Noah G. Skrzypczak, Nagendra G. Tanikella, and Joshua M. Pearce. The Cerebus is under $1000, has a heated bed and space heater allowing temperatures up to 200 C, and a printing hot end with temperatures up to 500 C to print high temperature materials.
The project is immense, but the preprint is thorough, with pictures of each part, and step-by-step assembly instructions. All the files you will need to create this 3D printer are stored on the projects OSF page. This includes CAD and STL files, Firmware and Software, and general documentation used or mentioned in the preprint.
As an aside, Pearce’s group at Michigan Tech has a lot of cool projects, including an open source 3D metal printer.