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SoliForum - 3D Printing Community → The Latest in 3D Printing → filamaker
Hi everyone,
Here's a new filament extruder that grinds as well.
Not very impressed and a high price tag not to mention plastic pellets are so cheap I don't really see the value.
what do you guys think?
http://fabbaloo.com/blog/2013/10/8/recy … maker.html
Moved to The Latest in 3D Printing - lets keep topics in the Filastruder subforum to just posts about the Filastruder, to keep things simple.
The grinder is something he's been working on for a while! The base price (and shipping - that probably weighs ~15kg, so 150+ for shipping) is a bummer, but perhaps it will drop as he gets into production!
Otherwise it looks par for the course - wood boring auger, heaterband, motor. I wonder if he has a way of filtering the melt before extrusion. Recycling prints won't be much fun without one.
No problem Tim
I wasn't quite sure if I should paste it there or here.
I just want the grinder.
The grinder has been open source for a while, you can take the plans to a machine shop if you like.
The grinder has been open source for a while, you can take the plans to a machine shop if you like.
Id rather pay for one. No free time but lots of $ to spend.
Just so happens I own a machine shop 
elmoret wrote:The grinder has been open source for a while, you can take the plans to a machine shop if you like.
Id rather pay for one. No free time but lots of $ to spend.
Right. So walk into a machine shop with the plans and a pile of money, come back a week later for your grinder. 
Just to let everyone know I will give discounts in the forum for machining.
Just PM with what every you may want
Just curious... what is so special about the grinder? Can't you use like a coffee grinder or something?
Just curious... what is so special about the grinder? Can't you use like a coffee grinder or something?
There's two types of coffee grinders - blade type and burr type.
I've tried the blade type, it does not work. The blades get bent by the prints.
I've also tried the burr type, it works okay if you are starting with pellets and making them smaller. Good for masterbatch.
You really need a *shredder*, not a grinder. Paper shredders aren't powerful enough.
I think if you were sufficiently motivated you could make a grinder based on the theory of this: http://www.youtube.com/watch?v=K1a1QB4h1oA
Instead of making the cutting heads use ten or twelve (or whatever) of these:
http://www.harborfreight.com/4-in-24-to … 68400.html
Start with a circular saw for the first shaft, standard saw arbor for the second shaft, a couple gears or bicycle chain and sprocket to connect the two shafts, print a housing to fit it all together... plastic grinder! I'd bet it would eat aluminum cans too.
Just to let everyone know I will give discounts in the forum for machining.
Just PM with what every you may want
Let me know what you will charge to build the grinder shown above.
print a housing to fit it all together...
Not a chance this will work. The forces needed are impressive to shred parts of any decent thickness.
12 saw blades will give you a shredder ~ 1.5" wide. That doesn't handle many parts.
Marcus' open source files are here:
https://grabcad.com/library/mini-shredder--1
I'd estimate the cost for a one off at real machine shop rates to be ~$500, maybe cheaper if they have a waterjet. Marcus says you need a motor capable of 10 RPM and 180 N-M, which is NOT trivial. That's a 1/3 HP gearmotor, a quick search puts that at around $300+.
At $800, you'd need to shred ~200lbs of failed prints to make back your investment.
Marcus' open source files are here:
https://grabcad.com/library/mini-shredder--1
I'd estimate the cost for a one off at real machine shop rates to be ~$500, maybe cheaper if they have a waterjet. Marcus says you need a motor capable of 10 RPM and 180 N-M, which is NOT trivial. That's a 1/3 HP gearmotor, a quick search puts that at around $300+.
At $800, you'd need to shred ~200lbs of failed prints to make back your investment.
I want the hand crank version...
I want it more for the novelty value than the return on my investment.
Ah fair enough. If you're only using it casually, you probably don't need tool steel which will cut down on costs as well.
elmoret wrote:Marcus' open source files are here:
https://grabcad.com/library/mini-shredder--1
I'd estimate the cost for a one off at real machine shop rates to be ~$500, maybe cheaper if they have a waterjet. Marcus says you need a motor capable of 10 RPM and 180 N-M, which is NOT trivial. That's a 1/3 HP gearmotor, a quick search puts that at around $300+.
At $800, you'd need to shred ~200lbs of failed prints to make back your investment.
I want the hand crank version...
I want it more for the novelty value than the return on my investment.
This is the version I would want...go to about the 0:58 mark if you don't want to see the construction.
http://www.youtube.com/watch?v=Xn80EAikqjs
I wonder if that comes in a hand crank version.
This is the hand crank version -
This is the hand crank version -
The archaic shredder... Awesome!
Well before I saw this thread I was just sort of spitballing an idea that it migh tbe possible to grind smaller pieces simply using the auger and pipe opening design of the filastruder. I assume pieces caught between the opening in the pipe and the edge of the auger would get sheared off. You wouldn't want to do this while also trying to make filament.. if it's at all viable I'd have a separate setup just for that.
Any thoughts? I'd rather have something that could deal with larger pieces anyway.
That would work better for pelletizing filament, but that is a pretty useful application on its own.
Looks like I can do this for about $380
However tool steel will not be used
it will be replaced my hardened steel
let me know if your interested.
tool steel will bring up the cost to $420.00
$380 with a hand crank, I assume?
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