[GUIDE] Combine filaments- cut the waste from the 3D filaments

Anyone who enjoys printing, after some time will find themselves with a lot of leftover filaments, why not combine filaments? Pieces too short to be used, but at the same time too long to be thrown away. When we find ourselves with a piece of wire ranging from 50 cm to 3/4 meters we don’t know what to do with it, and we treat it like any other existential doubt to which we don’t find an answer, we put it away.

What if I proposed to dust off (in the true sense of the word) and find a use for these leftovers, joining them to form a filament long enough to actually create something useful? Impossible to re-epond? No, it’s possible and much easier than you think.
Moreover, this process can be carried out with everyday objects that (maybe) you already have at home! Here is one of our most useful guides!

Required material

As already mentioned, all we’re gonna need are these four items:

Flame lighter/lighter
Thermosetting tube 2 mm in diameter


Combine filaments: Procedure

First get the two pieces of filaments leftovers you want to join and clean them from any accumulation of dust. Now with the scissors make a cut to the garment that you want to join, at an angle, with the scissors. And repeat the same procedure to the other thread.
Join the two parts so that they match as precisely as possible and through the lighter heat this union briefly. Until the two pieces are slightly connected, just enough not to detach them moving only one.

Wait patiently for the filaments to return to room temperature. After about 2 minutes, you can thread the heat-shrinkable sheath, a prepared piece of about 3 cm in length, to one end of the wire and stop it at the part you need to weld. With the lighter you have to heat up the entire sheath. It will retract taking the shape of the underlying filament, and then insist particularly at the point of welding. The heat-shrinkable sheath will ensure that your filaments maintains the desired diameter, works as a bag of containment.

Once everything is hot, you can see it with your eye or with the help of a temperature probe, with your hands you can try to compress the wire inside the sheath, trying to push it in or trying to mix it with rotating movements. filament tools leftover

This part can be repeated if you feel you have not been incisive, or if filaments has cooled down too quickly.

Do this process and wait 20 minutes to make sure the material has returned to room temperature. Alternatively you can help yourself with a compressor, a can of compressed air or liquid nitrogen.
Now all that is left is to remove the heat-shrink tubing with the help of the cutter.

Here is your perfectly welded filament!

Combine filaments: Some Tips

combine filaments

This process requires a minimum of manual skill and experience, it is likely that it will not succeed the first time, apply yourself and do not give up!

The combine filaments so joined are very resistant to traction but, like a poorly preserved, not very resistant to cutting. Try not to bend it right next to the weld.

If this guide seems too difficult to you, you can watch our video. In the video you can see how simple this process is in reality:

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