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29 votes
Accepted

How to recycle filament material from printed parts?

There are a few options. Machines are available which grind the used plastic into fine pieces, melt it down, and extrude it as filament to be reused. Filabot is perhaps the most well known. Depending ...
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  • 1,493
8 votes
Accepted

Making your own filament

Quality depends on 3 things: Quality of pellets (purity, fillers, color) Where/how they are stored before and during the extrusion (humidity, contaminants) Have a filter in your extruder to get rid ...
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  • 934
7 votes
Accepted

Conversion of 3 mm ABS filament to 1.75 mm

In theory, making filament is easy. You take a 3 mm hotend with a 1.75 mm hole, and extrude the 3 mm (sometimes actually 2.85 mm) filament, let it cool, and then reel it up. In ...
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  • 1,803
7 votes

How to recycle filament material from printed parts?

If you're more interested in the recycling and reuse aspect than the re-print aspect, you could melt all the scrap filament onto a cookie sheet or into a bar (like in a bread ban). You could then ...
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6 votes
Accepted

What types of pigments can be used when making your own filaments?

The normal way pigment is added to filament (or any other extruded plastic product) is by mixing "masterbatch" pellets containing a high concentration of dye with the raw resin pellets. (https://en....
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  • 6,446
6 votes
Accepted

Can general purpose polystryene (not HIPS) be used for 3D printing?

In principle, it should work fine as a filament, since it's used extensively in the plastic extrusion industry, but I don't think you'd get great material properties out of it. ABS and HIPS ...
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  • 6,446
6 votes

Making your own filament

You can basically use any machine that pulverizes your pellets into small pieces. One guy on 3dhubs, explained it in details. My conclusion is that you can recycle everything using this data ...
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5 votes

Making your own filament

Producing own filament is a challenging task. I see main pitfall in producing filament so it has same quality as you get in shop. You have to: constant round-shape diameter diameter tolerance ±0.05 ...
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  • 1,911
5 votes

Conversion of 3 mm ABS filament to 1.75 mm

The best option is to find somebody in need of 3 mm filament and trade them for it (either in exchange for 1.75 mm filament or in exchange for legal tender with which to buy said filament). ...
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4 votes

How does the Filament production process work?

Some general comments about the process used (plastic extrusion): The plastic extrusion process is not simple- many textbooks dense with equations have been written about it. The lowest cost ...
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3 votes

Conversion of 3 mm ABS filament to 1.75 mm

You could build a machine that has a nozzle with 3 mm input hole and 1.75 mm output hole, based on some designs for filament making machines. Or you could just cut the filament into little peaces and ...
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  • 1,076
2 votes

Filament mixer?

OK, it just turned up on Thingiverse that someone has demonstrated a trivial machine to do exactly what I asked for: any FDM printer. Its sounds crazy, but it works! This technique will allow you to ...
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2 votes

How does the Filament production process work?

I do my own filaments and its pretty simple. The real key for quality is stability of everything. The temperature, the movement of the air around cooling part, the extrusion force, both internal and ...
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2 votes
Accepted

What type of plastic can be used to produce your own filament?

Filament manufacturers (for example, Colorfabb) also sell pellets, price per kilo would be about 10 times less than the same plastic in filament form. Out of household garbage only ABS can be easily ...
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Only top scored, non community-wiki answers of a minimum length are eligible