Nylon and Carbon Fibre 3D printer

[Dan Newman]

http://markforged.com/

In the FAQ section, there's a question regarding whether or not the
filament can be used with other printers. The answer is no, the
special patent pending print head is required. There's also the implication
in the marketing material that this filament is different from filament
with lots of chopped up carbon fibre. Possibly a reference and contrast
to the stuff over on Kickstarter.

So what's a kinematic coupling? MIT's PERG (Precision Engineering
Research Group) has some web pages on the topic,

http://kinematiccouplings.org/

Dan

[Jetguy]

Cool link.

I did a lot of studying and thought on this one and there was a question in the UM forum about if this was real and how does it work.

My response,

It appears to be an H-bot gantry system (might be Core XY but you need to see the entire belt path).

I think they are extruding a filament that has a long fiber already embedded through the center. The trick is they have a chopper to cut the filament mid stream.

In other words, pretty normal extruder except when you stop extruding, you have a string that must be cut at the nozzle tip or maybe they somehow cut before it's fed into the hot end letting the other cut end push it though.

It is cool, it really does work, I think one could experimentally try to copy the effect.

You need a filastruder to make the filament with the embedded fiber inside. And that's what makes this different, it's a long fiber instead of tiny cut fibers. You gain proper strength this way. I also see ways to walk around a patent if they have one. Like I said, you could cut before or after the hot end, but after the nozzle might be a little trickier. Before the nozzle is a logical method and as I said, I could easily see a system after the filament drive section that lets something shear the filament and thread but still serves as a guide so the cut piece is pushed through. Notice how they only use the fiber on cartain paths and infill on a perimiter. This works with my theory because they want one long thread wound and bonded in, then cut at the end.

 

 

 

[David Yu]

Very cool. The filament is 550 dollars a pound! Ouch

So you say the carbon fiber is embedded in plastic filament and will be chopped up in the extruder. The sample on the website say one long continuous fiber. 

[Kurt @ VR-FX]

Yes - one long Carbon fiber within the Filament - but, after you print a piece - and you Stop Printing - THAT is when the Carbon Fiber MUST be cut to end the print job.

-K-

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[David Yu]

ah i got it thanks

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[Kurt @ VR-FX]

NP!
:-)
-K-

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[John Steven Jacob]

That’s quite expensive for a filament. But I think it’s very cool to experiment for printing different objects. I’m wondering if you can use the Carbon Fibre 3D printer with this premium Nylon Filament: http://www.3d2print.net/shop/product-category/premium-filament/taulman-nylon/

Noong Miyerkules, Enero 29 2014 11:34:48 UTC+8, si Dan Newman ay sumulat: