{"id":10880,"date":"2018-12-25T15:00:01","date_gmt":"2018-12-25T15:00:01","guid":{"rendered":"https:\/\/www.3dnatives.com\/en\/?p=10880"},"modified":"2019-09-03T09:15:27","modified_gmt":"2019-09-03T09:15:27","slug":"researcher-magnetic-3d-printing-process-251220185","status":"publish","type":"post","link":"https:\/\/www.3dnatives.com\/en\/researcher-magnetic-3d-printing-process-251220185\/","title":{"rendered":"A researcher invented a magnetic 3D printing process"},"content":{"rendered":"

At the\u00a0Zurich 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.\u00a0Kai von Petersdorff-Campen dubbed his process ”\u00a0Embedded magnet printing<\/em>\u00a0” and made a prototype heart pump to demonstrate his progress.\u00a0A magnetic 3D printing process that could change the way engineers develop and test their designs.<\/p>\n

Magnetic 3D printing is still rather limited today, although researchers are looking into the issue.\u00a0We know that certain initiatives have made it possible to develop\u00a0hybrid materials<\/a>, or even directly\u00a0electronics<\/a>.\u00a0The 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.<\/p>\n

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The prototype of the heart pump<\/p><\/div>\n<\/div>\n

A magnetic 3D printing process<\/h3>\n

The ”\u00a0Embedded magnet printing<\/em>\u00a0” process would consist of mixing a magnetic powder with the plastic to form a 3D printing filament.\u00a0Using the technology of\u00a0Fused Deposition Modeling<\/a>\u00a0and\u00a0Prusa i3 3D printer<\/a> these filaments are extracted layer by layer and form the desired part.\u00a0This one would then be magnetised in an external field.\u00a0Petersdorff-Campen explains that the main difficulty in the development of the magnetic filament was to find the right proportions to mix.\u00a0He discovered that the stronger the magnetic powder added to the plastic pellets, the more the magnetic force increased which weakened the filament.\u00a0The researcher finally managed to find a good balance between power (in terms of magnetism) and flexibility.\u00a0“We tested various plastics and mixes until the filaments were flexible enough for printing but still had enough magnetic force,<\/em>” Petersdorff-Campen added.<\/p>

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Petersdorff-Campen tested his method by creating a rotating heart pump prototype that incorporates magnets. The latter being the critical components of the object.\u00a0Its prototype has been imagined to be geometrically and magnetically complex.\u00a0He explains; “My goal was not to make a good heart pump, but to demonstrate the principle of how it can be produced in a single step.<\/em>” It took 15 hours to print the artificial heart pump, consisting of 10 pieces of which contained 8 magnets.<\/p>\n

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Photo credits: ETH Zurich<\/p><\/div>\n<\/div>\n

At the testing stage<\/h3>\n

The Swiss confirms that his research is only intended to test the principle of integrated magnetic printing;\u00a0he claims that his filaments are not for sale.\u00a0He concludes: “There is still a lot to improve in terms of material and processing; I wouldn\u2019t want to have such a device implanted.<\/em>” This method could be used to make electric motors, used in home appliances, hard drives or speakers.\u00a0You can find more information on\u00a0the ETH Zurich website<\/a>\u00a0and in the video below:<\/p>\n