Kai von Petersdorff-Campen, a doctoral student in the Department of Mechanical and Process Engineering at ETH Zürich, Switzerland,a 3D printing technique has been developed to make products containing magnets. He demonstrated his method, called "Embedded magnet printing," by 3D printing an artificial heart pump prototype, and won the first prize for prototyping from the American Society for Artificial Internal Organs (ASAIO).Artificial heart pumps are not only products with complex geometric shapes, but more importantly, they contain magnets - research is still in its infancy in the field of 3D printing using magnets. Petersdorff-Campen’s heart pump is therefore one of the first prototypes with magnetic components manufactured using 3D printing.
This spring, the 26-year-old doctoral student developed a prototype. Petersdorff-Campen calls his newly developed method “embedded magnet printing”. The key is to make sure the magnets are 3D printed directly in the plastic.Magnetic powder and plastic are mixed before printing and then processed into filaments. Using FDM technology, these filaments are printed as nozzles, which automatically output computer-generated shapes, as well as its various components.The printing is then magnetized in an external magnetic field.The plastic heart pump prototype took 15 hours to print.