Coloring 3D Prints With Sharpies

sharpies

Printing objects in full color easily is one of the paramount goals of the ‘squirting plastic’ 3D printer scene, and so far all experiments have relied on multiple colors of filament, and sometimes multiple extruders. This, of course, requires a stock of different colored filaments, but [Mathew Beebe] has a different idea: why not dye a natural colored filament just before it’s fed into a printer? Following his intuition, [Mathew] is doing some experiments with the common Sharpie marker, and the resulting prints look much better than you would expect.

The basic procedure or this technique is to drill a hole in the butt end of the Sharpie, pull out the felt in the tip, and feed a length of filament through the marker before it goes into the extruder. The filament is dyed with the Sharpie ink, and the resulting print retains the color of the marker.

Despite the simplicity of the technique, the results are astonishing. An off-white ‘natural’ filament is easily transformed into any one of the colors found in Sharpies.

Besides the common Sharpie, there’s a slightly more interesting application  of this technique of coloring 3D printer filament; as anyone who has ever been in a dorm room with a blacklight knows, you can use the dye inside a common highlighter to make some wicked cool UV-sensitive liquor bottles. Whether the ‘Sharpie technique’ works with highlighters or other markers is as yet unknown, but it does deserve at least a little experimentation.

Video below.

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Filament Extruder Pumps Out 1kg/hour!

3d printer filament factory

3D printers are awesome, and while the plastic filament may not be as much as a rip off as printer ink (yet), it’s still marked up at least 500%! If you really want to break free, you’re going to need your own filament extruder.

ABS, a typical printing material, will run you about $30 USD per kilogram. Don’t get us wrong, that will go a long way — but did you know ABS pellets (technically processed MORE than filament) can be as cheap as $3-4/kg?

What if you could buy the pellets, and make your own filament with them? If you do a lot of printing, this could save you a lot of money. We’ve seen lots of different filament extruders here on Hackaday, and here’s yet another iteration — capable of extruding at an extremely fast rate of 1kg per hour! [Ian McMill] was inspired by [Xabbax’s] Low Cost Filament Extruder, and has put together an excellent Instructable guide on how to make your own — with his own flair of course.

Take a look!

Recycling Plastic With Liquid Nitrogen

Ln2

Recycling 3D printer filament isn’t a new idea, and in fact there are quite a few devices out there that will take chunks ABS, PLA, or just about any other thermoplastic and turn them into printer filament. The problem comes when someone mentions recycling plastic parts and turning them into filament ready to be used again. Plastics can only be recycled so many times, and there’s also the problem of grinding up your octopodes and companion cubes into something a filament extruder will accept.

The solution, it appears, is to freeze the plastic parts to be recycled before grinding them up. Chopping up plastic parts at room temperature imparts a lot of energy into the plastic before breaking. Freezing the parts to below their brittle transition temperature means the resulting chips will have clean cuts, something much more amenable to the mechanics of filament extruders.

The setup for this experiment consisted of cooling PLA plastic with liquid nitrogen and putting the frozen parts in a cheap, As Seen On TV blender. The resulting chips were smaller than the plastic pellets found in injection molding manufacturing plants, but will feed into the extruder well enough.

Liquid nitrogen might be overkill in this case; the goal is to cool the plastic down below its brittle transition temperature, which for most plastics is about -40° (420° R). Dry ice will do the job just as well, and is also available at most Walmarts.



            

The LATHON Dual Nozzle 3D Printer

lathon

Our friends at Freeside Atlanta have been keeping busy despite the city-stopping snowstorms they’ve been suffering recently. This time it’s a 3D printer with dual extrusion: the LATHON printer. [Nohtal] bought his first 3D printer only two years ago, but his experiences led him to build his own to overcome some of the issues he encountered with standard printers.

The LATHON keeps the bed stable and instead moves only the nozzles, using Bowden extrusion to reduce the weight on the moving parts. A key feature is the addition of a second nozzle, which usually limits the print area. The LATHON, however, maintains a 12″x9″x8″ build volume thanks to the Bowden extruders. [Nohtal] documents the majority of his build process on Freeside’s blog, including using a plastic from GE called Ultem 2300 for the print bed, and running the printer through its paces with a slew of materials: ABS, PLA, HIPS, Nylon, TPE, Wood, and Carbon Fiber. You can find more information on the Kickstarter page or at lathon.net

Check out some videos below!

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The FilaWinder

filawinder

The latest addition to the line of 3D printer accessories is the FilaWinder, a tool for winding your filament neatly onto a spool. If you’ve abandoned buying your filament by the reel in favor of making your own from cheaper pellets—such as the Lyman Extruder, the Filabot Wee, or other alternatives, including the winder’s companion product, the FilaStruder—then you’ve likely had to roll everything up by hand, perhaps after it flopped around on the floor first.

The FilaWinder spools for you while the filament extrudes, using a sensor to adjust the winding the speed to match extrusion rates as well as running it through some PTFE tube to gently coil it as it moves along. Perhaps most important, the FilaWinder provides a guide arm to direct the filament back and forth across the reel as it spools up, to keep it evenly distributed. Swing by their Thingaverse page for a list of printable pieces and their assembly guide can be found here, as well as on YouTube. You can see an overview video of the FilaWinder winding away after the break.

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Low Cost Filament Extruder

Here’s a great low cost filament extruder solution. It uses basic parts available from any hardware store, and a few 3D printed ones — estimated cost is well under $100.

It’s very similar to the Lyman Filament Extruder, but can be built for even less money. By using 200C set-point heaters, his setup requires absolutely no electronics — although a cheap PID controller from China could give him more extrusion capabilities with temperature control… Regardless, the system appears to make good filament and he uses it exclusively for his personal filament consumption in his Delta printer. He’s even hacked up the ABS casing of a refrigerator, ground it down, and turned it into filament using this machine! If you’re hungry for more details, the full build log and discussion can be found on the RepRap forums.

He also has a guide on making your own ABS color masterbatch to make your own filament colors!

[Thanks Liam!]

3D Printering: Alternative Filaments

printering

ABS and PLA are the backbones of the 3D printing world. They’re both easy to obtain and are good enough for most applications. They are not, however, the be-all, end-all filaments for all your 3D printing needs. Depending on your design, you may need something that is much tougher, much more flexible, or simply has a different appearance or texture. Here are a few alternative plastics for your RepRap, Makerbot, or other 3D printer:

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