Magnetisches Filament gesucht

[micpic 4]

Hallo Forum,

 

ich bin auf der Suche nach einem eigenmagnetischem Filament. Also nicht Eisenhaltiges Filament, sondern eben eines das schon einen Eigenmagnetismus hat. Ich habe gelesen, das ein Doktorand aus der Schweiz eines entwickelt hat. Finde aber keine Vertriebsinfos. Kann auch sein, das es noch nicht auf dem Markt ist.

 

Sollte es kein eigenmagnetisches geben, dann würde ich einen Erfahrungstipp brauchen welches in einen hohen Eisenanteil hat und wie es sich drucken lässt.

 

Drucker ist ein Ultimaker 3 Ext.

 

Viele Grüße

 

Michael

 

 

[geert_2 558]

I hope you speak a bit of English.

 

As far as I know, almost all magnets lose their magnetic characteristics at elevated temperatures, because the iron (or other) magnetic particles become looser and their alignment changes into random. For neodymium this is around 80...90°C if I remember well (but verify it, as I could be wrong).

 

3D-printing is done above 200°C...

 

So, I think you would need to print a magnetisable material, and then later turn that into a permanent magnet by exposing it to a very strong magnetic field. I don't know how that is done exactly, maybe at somewhat elevated temperature? Probably you can Google how permanent magnets are made?

 

Or maybe you could use a magnetisable material, for example iron-filled filament, and then put some very strong permanent magnets close to the nozzle (but out of the heat), so they align the freshly printed particles while still molten, during the printing? So that when cooled, they keep that orientation? Not sure if this would work, but it might be the easiest method to try.

 

Use an abrasive-resistant nozzle for this.

 

[micpic 4]

Hi Geert_2,

 

yes i understand what you say. I know it was clear thats impossible to print magnetic materials. I think so strange forward of my idea to use it for my prototypes 😉

 

I think it it not possible to magnetized the material direct in the near of the nozzle. The magnet will click on the nozzle. I do a small test with one of my magnet´s. After a distance < 4 cm the magnet jump up to the nozzle.

 

The second problem is the iron based filament will rusty after a small time. So i must print the first 1mm with TPU then the next 3 mm with  iron-filled filament the 1mm with Carbon. I think the  iron-filled filament in 3 mm it not strong enough to hold my parts.

 

But i will test it the next 14 days.

 

 

Do you have a recommendation for ferrous filament.

 

Thanks

Michael