<![CDATA[SoliForum - 3D Printing Community — Kickstarter For Plastic Shredder]]> https://www.soliforum.com/topic/15826/kickstarter-for-plastic-shredder/ Mon, 27 Sep 2021 15:42:55 +0000 PunBB <![CDATA[Re: Kickstarter For Plastic Shredder]]> https://www.soliforum.com/post/155001/#p155001 Lots of these shredders are really expensive.  Precious plastics is great for getting ideas on designs, but even with its relatively low costs, their shredder isn't always affordable by maker spaces, schools, people who just wanna mess around at home, etc.  But you can build a shredder with washers, plywood and a few basic things you can get on CL or at Home Depot, for under 100 bucks, and the main cost is a used gear motor.  But, if you make small blades, you don't need a giant motor; even 600 in-lbs or a bit less torque will work.  Check out this video:  https://www.youtube.com/watch?v=Kv72UHO-0c8 for how to make one.  Hope it helps some of you who want to make one.

]]> Mon, 27 Sep 2021 15:42:55 +0000 https://www.soliforum.com/post/155001/#p155001 <![CDATA[Re: Kickstarter For Plastic Shredder]]> https://www.soliforum.com/post/131028/#p131028 Yea i saw that, thanks. keep up to date with the dev blog on my website for the shredder and i hope to get more prototypes and also those expansion modules for the funnel and the motor designed and priced out. any other questions about the project just ask thanks.

]]> Fri, 13 Jan 2017 10:04:03 +0000 https://www.soliforum.com/post/131028/#p131028 <![CDATA[Re: Kickstarter For Plastic Shredder]]> https://www.soliforum.com/post/130823/#p130823 I bought one on pre-order (emailhere=spam), looking forward to when it will be starting producing in February. It would make my reclaiming of failed prints a lot easier.

edit: wardjr helping keep your inbox spam free smile

]]> Mon, 09 Jan 2017 21:26:25 +0000 https://www.soliforum.com/post/130823/#p130823 <![CDATA[Re: Kickstarter For Plastic Shredder]]> https://www.soliforum.com/post/130588/#p130588 Nice! Needs a motor though. I get the liability issues, so perhaps just provide a way to connect one without too much fuss. Maybe have the hand crank held on to a square or hex drive perhaps? 1/2" socket wrench adapter? Just some thoughts that might help you sell more of them without opening yourself up to liability issues. If I do something stupid like attach my impact wrench to it, that's not on you. smile

]]> Thu, 05 Jan 2017 23:00:30 +0000 https://www.soliforum.com/post/130588/#p130588 <![CDATA[Re: Kickstarter For Plastic Shredder]]> https://www.soliforum.com/post/130456/#p130456 As the Kickstarter comes to a close and i have done a lot of work on it since i have gone on break i have been able to drop the price. I have been able to drop the price down to 125$ from 350$. This is because now i am going to mill it out instead of waterjetting. This will basically drop price of machining down by 3 times but increase time of machining by 3 times.

I have them on sale on my website right now. here http://www.thegreenengineers.com/store/ … -shredder/

also keep up to date on my dev blog for the reclaimer http://www.thegreenengineers.com/blogs/ … -dev-blog/

]]> Wed, 04 Jan 2017 10:30:54 +0000 https://www.soliforum.com/post/130456/#p130456 <![CDATA[Re: Kickstarter For Plastic Shredder]]> https://www.soliforum.com/post/129286/#p129286 I wonder why anyone has commented about the Precious Plastic Shredder: https://preciousplastic.com/en/videos/build/shredder/
It's opensource, laser cutting the parts costs around $350 plus gear motor and frame, it's fully documented and has a huge community of builders and helpers at https://davehakkens.nl/community/forums/. The shredder proposed here would require to hook up a gear motor (add $300-$400 more) and you also need a metal frame to fix it steady. A hand crank is only feasible for shredding vegetables or plants in general, unless you are a super human with 300 kilos of muscle capable of hand shredding hard plastic.

]]> Fri, 16 Dec 2016 21:24:00 +0000 https://www.soliforum.com/post/129286/#p129286 <![CDATA[Re: Kickstarter For Plastic Shredder]]> https://www.soliforum.com/post/129172/#p129172 The main problems with the grinder are heat, input size and viable output.
Like an industrial extruder, the plastic in the grinder experiences enough shear to generate heat. It becomes noticeable after grinding for about 5 minutes by hand.
Due to the size of the opening, the grinder can only handle chunks about the size of a ping-pong ball if they have an irregular shape that catches on the auger. An actual ping pong ball would have to be split into pieces before the grinder could process it.
Finally, the grinder could only manage about a cup of shredded plastic in a minute. In the best scenario, it might make double that, but only with a strong, fast motor and "quick" pieces of plastic.

]]> Wed, 14 Dec 2016 12:54:31 +0000 https://www.soliforum.com/post/129172/#p129172 <![CDATA[Re: Kickstarter For Plastic Shredder]]> https://www.soliforum.com/post/129171/#p129171 If you spend $65 or more for a good one with a pulley, and attach a powerful motor to it, the grinder can actually shear larger chunks where the auger meets the edge of the "hopper." As long as the parts can get into the opening, the part gets sheared bit by bit until it reaches the cutting plate, where it is either split or shaved into pieces smaller than the holes in the cutting plate.
http://www.soliforum.com/topic/15731/an … lastruder/

]]> Wed, 14 Dec 2016 12:43:22 +0000 https://www.soliforum.com/post/129171/#p129171 <![CDATA[Re: Kickstarter For Plastic Shredder]]> https://www.soliforum.com/post/129149/#p129149 I didn't know that a meat grinder was an effective machine. I watched a few videos and it doesn't look like it works. Is it a viable alternative?

]]> Wed, 14 Dec 2016 01:26:12 +0000 https://www.soliforum.com/post/129149/#p129149 <![CDATA[Re: Kickstarter For Plastic Shredder]]> https://www.soliforum.com/post/129110/#p129110 yea i check it out there prices are pretty good. however i can do it cheaper on my end because of my own access to a waterjet.

]]> Tue, 13 Dec 2016 02:15:45 +0000 https://www.soliforum.com/post/129110/#p129110 <![CDATA[Re: Kickstarter For Plastic Shredder]]> https://www.soliforum.com/post/129102/#p129102 TheGreenEngineers wrote:

the reclaimer 6"x6"x3.5" has over 80 pieces. 24 of them are 1/4" blades so at 5 dollars a blade so 120 right. And if it is from china from all the talking I have done with china it is 100$ shipping per unit so that's $220. the lowest I have been quoted from china is 200 dollars shipped. The most I have been quoted is $600.

Not from China, it would be made in the US - BigBlueSaw. It'd be less than $120, you're rounding up and not considering the discount tier after 1000 blades. I'm not sure there's value in having the shredder quite that large in terms of maximizing interested customers (if it is too large, it will be too expensive for folks to be interested). I think most folks can get their parts down to baseball size, its going from baseball size to granulate that is difficult. Remember too that the more blades you have, the more torque you need - stronger shafts, bearings, gears, and possibly motor.

The "$100" number mentioned was just for the waterjet parts.

Just trying to help.

]]> Tue, 13 Dec 2016 00:34:39 +0000 https://www.soliforum.com/post/129102/#p129102 <![CDATA[Re: Kickstarter For Plastic Shredder]]> https://www.soliforum.com/post/129099/#p129099 sure I realize that that might not be applicable to you guys as a filament shredder. but another application that I have been advertising it as is for shredding any wood for composting and other hard organic materials.

]]> Mon, 12 Dec 2016 22:36:56 +0000 https://www.soliforum.com/post/129099/#p129099 <![CDATA[Re: Kickstarter For Plastic Shredder]]> https://www.soliforum.com/post/129098/#p129098 the reason why shredders are more expensive is because of the versatility. Some industrial grade shredders are engineered with so much strength that they can shred cars. Try to do that with a meat shredder. I just did some analysis of the shredder and the max shear I found capable of 280Mpa if max hardened (this is for a not yet optimized design). That is enough to shear brass and aluminum and anything softer try to do that with a meat shredder.

]]> Mon, 12 Dec 2016 22:32:44 +0000 https://www.soliforum.com/post/129098/#p129098 <![CDATA[Re: Kickstarter For Plastic Shredder]]> https://www.soliforum.com/post/129097/#p129097 the reclaimer 6"x6"x3.5" has over 80 pieces. 24 of them are 1/4" blades so at 5 dollars a blade so 120 right. And if it is from china from all the talking I have done with china it is 100$ shipping per unit so that's $220. the lowest I have been quoted from china is 200 dollars shipped. The most I have been quoted is $600.

]]> Mon, 12 Dec 2016 21:59:33 +0000 https://www.soliforum.com/post/129097/#p129097 <![CDATA[Re: Kickstarter For Plastic Shredder]]> https://www.soliforum.com/post/129096/#p129096 I was just about to say that casting might be the way to go, since I can easily get a decent meat/bone grinder for under $75, but custom-manufactured units like industrial shredders always seem to cost a fortune. While the upfront costs are staggering, I could easily see a robust $150-$200 unit achieving a couple dozen grand on Kickstarter. Another $50-$100 for a motor, drive system, and safety housing, and it could be a winner.
Of course, it's a bit late to go this way for the Kickstarter, and the housing might be more expensive than my guess here, but one can hope...

]]> Mon, 12 Dec 2016 21:17:20 +0000 https://www.soliforum.com/post/129096/#p129096