A researcher invented a magnetic 3D printing process

At the Zurich University of Applied Sciences (ETH), a doctoral student in the process engineering and mechanics department developed an additive manufacturing technique to create objects containing magnets in one go. Kai von Petersdorff-Campen dubbed his process ” Embedded magnet printing ” and made a prototype heart pump to demonstrate his progress. A magnetic 3D printing process that could change the way engineers develop and test their designs.

Magnetic 3D printing is still rather limited today, although researchers are looking into the issue. We know that certain initiatives have made it possible to develop hybrid materials, or even directly electronics. The Swiss PhD student wanted to look into the development of a magnetically charged plastic filament. A process that has been widely talked about around the world.

The prototype of the heart pump

A magnetic 3D printing process

The ” Embedded magnet printing ” process would consist of mixing a magnetic powder with the plastic to form a 3D printing filament. Using the technology of Fused Deposition Modeling and Prusa i3 3D printer these filaments are extracted layer by layer and form the desired part. This one would then be magnetised in an external field. Petersdorff-Campen explains that the main difficulty in the development of the magnetic filament was to find the right proportions to mix. He discovered that the stronger the magnetic powder added to the plastic pellets, the more the magnetic force increased which weakened the filament. The researcher finally managed to find a good balance between power (in terms of magnetism) and flexibility. “We tested various plastics and mixes until the filaments were flexible enough for printing but still had enough magnetic force,” Petersdorff-Campen added.