Building a Hand Cranked Shredder for Recycling Plastics 💪

Рет қаралды 250,087

4 жыл бұрын

Start your Squarespace free trial today at www.squarespace.com/cnckitchen and use code CNCKITCHEN to get 10% off your first purchase.
Let me show you how I built a hand-cranked shredder for recycling plastic waste. I want to use the shredded material to 3D print new parts from it. The shredder was sourced from the Precious Plastics Bazar and delivered as a box of sheet metal parts. Assembly was quiet easy only getting a proper hand crank was a challenge. I ended up with a 80cm long 25x25mm steel tube that is attached to the shaft via a laser-cut adapter. Similar particle size is very important during the process so I designed stackable and 3D-printable sieves that are used to obtain the different particle fractions.
Website article: www.cnckitchen.com/blog/87dmuenxzk111r2reov2wpt2ybojdv
💚 Support me 💚
Patreon: / cnckitchen
Join as a KZfaq member!
Original CNC Kitchen Threaded Inserts: geni.us/CNCKInsertsChoice
Merch: teespring.com/stores/cnckitchen
Buy an Original Prusa i3 printer: geni.us/CNCKPrusa
PayPal: www.paypal.me/CNCKitchen
Shop at Matterhackers(US): www.matterhackers.com/?aff=7479
Shop at 3DJake(EU): geni.us/zHvnB
🎙Check out my PODCAST with Tom Sanladerer
/ @themeltzone
📚Further information:
Precious Plastics: preciousplastic.com/
Hand crank adapter: www.prusaprinters.org/prints/...
Stackable Sieves: www.prusaprinters.org/prints/...
Direct Pellet Extruder: mahor.xyz/
Filastruder: www.filastruder.com/
⚙ My gear (Affiliate Links):
🎥 CAMERAS & LENSES
Panasonic GH5 - Professional 4k60 camera: geni.us/LMN0CmS
Panasonic GX80/GX85 - Great value system camera: geni.us/M2Sm
30mm f2.8 macro - Great Macro Lense (80% of my videos): geni.us/vEwqD
10-25mm f1.7 - Awesome Lense: geni.us/ZTBH
12-35mm f2.6 - Great Allround Lense: geni.us/S9GOsr
14-140mm f3.5-5.6 - My go-to travel lense: geni.us/fSAyKo
25mm f1.4 - Nice prime for photoraphy: geni.us/mqWM
🎙AUDIO
Rode Video Mic Pro - Shotgun mic: geni.us/6JFRdJ
Rode Film Maker Kit - Wireless mic: geni.us/XMD2N
Rode NT-USB - Studio Mic: geni.us/YVONvy
🔴 LIVE STREAMING
Elgatoo Stream Deck: geni.us/ppIiAL
Elgatoo HDMI USB Capture Card: geni.us/imhD
Logitech C920 - Overhead camera: geni.us/ViVgB
Follow me on Twitter: / cnc_kitchen
Follow me on Instagram: / cnckitchenyt
Disclaimer: This video was sponsored by Squarespace.

Пікірлер: 751

@CNCKitchen 4 жыл бұрын

Don't forget to share this video on Facebook, Reddit, Twitter and other social media!

@hyperhektor7733 4 жыл бұрын

you could use a reduction gearbox(1:12-15) + a drill or cordless drill to speed up the process, one other comment suggestet to preheat the parts like 60-100degrees (?)

@ts3dprints732 4 жыл бұрын

I was thinking a bicycle/motorcycle gear reduction could be made to help out. Maybe a concrete base to weigh it down and hold the gear reduction. The molds for the concrete could be 3d printed.

@coolfrost6 4 жыл бұрын

Teaching tech seemed to have good success using a cheap electric winch

@feds27 4 жыл бұрын

This idea seems good for a 1st pass before feeding the line through a filament former. www.kickstarter.com/projects/910418035/plastic-bottle-cutter

@TheBowersj 4 жыл бұрын

can you mix different plastics together and do a strength test on them, maybe you can make a stronger plastic yourself?

@Ic3Fenix 4 жыл бұрын

You should consider replacing the long lever with a gearbox to make the spinning easier. Good job for the project :D

@LordtwoDark 4 жыл бұрын

Great idea, maybe a worm gearbox? you get allot of torque out of those but you need more rotations.

@Ic3Fenix 4 жыл бұрын

@@LordtwoDark With this setup he doesn't need it, spur gears are more efficient and the gearbox will be compacted, saving a lot of space. I'm a mechanical engineer as he is, it will be easy for him to do the math for this upgrade

@lucaseyraud4031 4 жыл бұрын

Yeah just two gears with 5:1 ratio or more would make a huge difference. You should find some easily on Internet with the proper axis diameter... Well done anyway, I was planning doing the same but 350 is quite expensive for myself.

@kyleadkins2717 4 жыл бұрын

I was going to suggest the same thing, i was actually going to suggest a real big gear reduction and then hook that gear reduction to a small predator engine. Predator engines are dirt cheap at harbor freight and they tend to have decent torque at the rpms they can run. Im not sure how well vented this shop is but a small predator engine with a big gear reduction with those blades would chew through most any plastic i would suspect. Ive seen the blade systems that precious plastics make and almost bought one myself for fun but i just dont need it but during the process of thinking about it i was curious on how to solve the 220 motor problem. For the home shop that doesnt have a welding power drop at 220 an electric motor just isnt cost effective. Then you have to consider the motor controllers and safety from such a system. Going to an internal combustion would solve those problems real quick and you wouldnt have to mess with complex electrical issues and you would likely get a more stable torque since you could add more fuel for more power.

@LFdu83 4 жыл бұрын

This, and a ratchet so he can push the lever up and pull with his own weight

@santiagoblandon3022 4 жыл бұрын

You recycle and do indoor exercise at the same time! perfect for this times of quarantine =D

@sambarnes1226 4 жыл бұрын

The things people are doing with THIS sudden mass of time available

@JoeMalovich 4 жыл бұрын

a 14 tooth to 72 tooth sprocket chain reduction would help for sure.

@lordkahtu96 4 жыл бұрын

Take the "trash" particles and melt them on a hotplate into a puck then re-shred the puck to proper size particles.

@SkaveRat 4 жыл бұрын

the problem is: there are quite a lot of metal shavings in there. you *really* don't want those in your final filament

@kelpygsus132 4 жыл бұрын

@@SkaveRat You could probably use a strong magnet to sift them out couldn't you?

@rizalardiansyah4486 4 жыл бұрын

@@kelpygsus132 that might work

@m1c4o 4 жыл бұрын

maybe you can use water, the metal will sink, and the plastic will float

@denispoppitz8323 4 жыл бұрын

@@kelpygsus132 I think some part were made of stainless steel = only partly magnetic

@matthewfeurtado8921 4 жыл бұрын

It would be interesting to test the strength of a print after being recycled multiple times comparing each one to fresh pla

@skyak4493 4 жыл бұрын

In auto parts we had tolerance levels for regrind of sprues and runners. I suspect PLA will not tolerate much regrind because of the "annealing" behavior changing the melt temp. Molecular weight distribution affects melt properties and strength and every mechanical break of plastic cuts chain lengths. ABS was fairly tolerant.

@make.anything 4 жыл бұрын

Awesome! I've been wanting to design a shredder like this, but the precious plastics prefabs sure are tempting. I just happened to source a beefy electric motor and gear train, but the handle solution is great

@MatthewSchoepf 4 жыл бұрын

Make Anything will you actually end up posting a video on it when it’s done ;) don’t forget about the filament maker.

@xvico613 4 жыл бұрын

Hello , we invite you to cooperate with our new 3d pinter model X5 , are you interested ? I also send you email .

@gentiligiuliano7882 2 жыл бұрын

I'm more worried of the price of the beefy gear reduction than of the beefy electric motor itself. I'm looking for a gear reduction rated for 500 Nm ... and they are expansive.

@ThomasTheFapEngine 4 жыл бұрын

Good to see people repping precious plastics. Nice touch trying the hand crank method, great video

@Mobile_Dom 4 жыл бұрын

i'd love to see a review or at least a more detailed look at that pellet extruder.

@CNCKitchen 4 жыл бұрын

Will do!

@foolishafraid562 4 жыл бұрын

@@CNCKitchen I'd also love to see a review of the extruder. 3d printing with waste PET would give people a nearly infinite source of material.

@roebyroeby1 3 ай бұрын

Hey@@CNCKitchen, or Stefan if you prefer. I'm curious about the performance of the Mahor V4, as I intend to buy it to make 3D printed prosthetics for amputees in Kenya. A local company makes recycled injection molding polypropylene pellets. Previously, I've already been using PP in the 3D prints because it's the strongest for the least amount of money. You probably can imagine that I've seen my fair share of failed PP prints, and had to optimize my printing process a lot. Eventually, by tweaking the design and getting a heated chamber, the prints come out excellent. I'm curious now if the Mahor V4 could achieve the same quality. If this were possible, I would be able to make prosthetics out of 100% recycled PP. I'm a big fan of your work, I learn a lot from your videos, could you please help me with this endeavor? Wish you all the best!

@fooman2108 2 жыл бұрын

Loved watching the camera doing the jitterbug on the table! LOL

@alangregg7171 4 жыл бұрын

i don't subscribe to many KZfaqrs. While watching this video i realized that even tho i have watched dozens of your work, i had not yet committed to a subscription. I have always enjoyed your videos, and today you have earned it.

@CNCKitchen 4 жыл бұрын

Thanks.

@Randomguy_1911 4 жыл бұрын

You could shred a bunch of benchies to create enough particles for a giant mixed color benchy

@robertcullipher3492 4 жыл бұрын

Add a powerful magnet in each filter stage to collect the metal shavings.

@arrgh- 4 жыл бұрын

water would have the same result, the plastic should swim. Update, I have to correct myself, water has a density of 997-1000 kg per cubicmeter, ABS has a density of 1030-1060 kg per cubicmeter, so per se ABS should sink :-(. Milk has the same density as ABS but I would not recommend it.

@robertcullipher3492 4 жыл бұрын

arrgh I originally thought water until I remembered how hydroscopic this plastic can be. Keeping it dry gives the most consistent experience.

@fataxe1 4 жыл бұрын

I thought he said it was stainless steel. Some grades have no magnetic properties, so a magnet may not work.

@jjcc8379 4 жыл бұрын

If those are stainless shavings there might not be of any help. Aisi 304 / 1.4301 , the most common stainless alloy , is non ferromagnetic . There are good ferromagnetic stainless alloys, but chances are a magnet won't help here.

@arrgh- 4 жыл бұрын

@@robertcullipher3492 just thought to divide the smallest parts from the metal. most plastic shouldnt be harmed and the water should disappear with the heating.

@goldbunny1973 4 жыл бұрын

Hi Stefan. Have you tried lightly warming the plastic in a microwave before tossing it into the shredder? That should reduce resistance without completely losing structural intgrity. Perhaps a geared link to the crank would increase torque & reduce back strain?

@jakegarrett8109 4 жыл бұрын

Might even do PLA in the winter (incredibly brittle, like I had my 3mm filament flying to pieces and showering my face and room like a frag grenade earlier today because it was so brittle coming off the roll...). So maybe for fun video get either dry ice or liquid nitrogen and dunk the part in it so it really explodes in that shredder (I think the parts should make a cool fog effect when they snap if they are cold enough and atmospheric conditions are correct). Useful? Probably not... But cool! (Im still not sure why the filament was so brittle, but warning it up helped a lot!)

@goldbunny1973 4 жыл бұрын

@@teeemm6415 A microwave could warm plastic by inductive heat; Stoneware can be heated to HOT by having something microwaveable in contact with it, so place the plastic in secondary contact and it'll be heated. You're not trying to heat it to it's melting point, only soften it's structure so it'll granulate more easily. Just my thought, could be wrong, can't test it as my microwave is currently offline : ) Someone could run a test tho..

@Xiph1980 4 жыл бұрын

Please don't do this. It makes it more difficult and you run the risk of gumming the entire device up. Freeze the parts, you want them to be brittle, not plasticized.

@goldbunny1973 4 жыл бұрын

@@Xiph1980 You're not "liquifying" the plastic. Can you test your freeze theory? Perhaps Stefan would like to try a few methods and make a video showing what happened?He's very good at Scientific Test comparisons.

@goldbunny1973 4 жыл бұрын

@@jakegarrett8109 LOL! Sounds like a video waiting to be made.

@Pyrowizurd 4 жыл бұрын

Recylce follow up? Finally! Thank you so much!

@SefPinney 4 жыл бұрын

For your hand cranked version, I believe a precious shredder with ½ to ⅔ the blade gauge widths and a smaller hook area would suit a lower load human setup. It would still run fine with a smaller motor. “Not biting off more than it can chew.”

@nesnduma 4 жыл бұрын

I really appreciate all your work to recycle printing material. Please go on!

@OneArmyVideos 4 жыл бұрын

nice one

@CKOD 4 жыл бұрын

Their marketplace is an interesting concept for connecting local business that would normally deal with primarily commercial customers, to consumers. Rather than having to pester fab shops to find one thats willing and isnt givng you a "I dont wanna spend the time on this but will if you really wanna pay" sort of quote, you can find a place that is willing to do it, has the setup for the project done already, and understands whats being built. Plus the fab shop gets to use whatever resources they invest in setting up multiple times. (Only have to do the CAD on the laser/plasma cutter once, only have to dial in the kerf compensation once)

@petetheprettygooddog 3 жыл бұрын

Stefan, you have excellent videos. You do a good job of explaining engineering related concepts. . Keep up the good work.

@Zitropat 4 жыл бұрын

Thank you Stefan and channel suscribers for this great project and their improvements!

@Dosman0026 4 жыл бұрын

Really Cool! since day one, I have kept every failed print/support. So I can one day recycle it all.

@alexanderthomas2660 4 жыл бұрын

Nice. It's good to see a company selling tools specifically for recycling plastics. I still keep all the failed prints I have ever made, as well as little scraps like supports and brims, in the hopes of ever being able to recycle them into new filament.

@chatroux399 4 жыл бұрын

great video !!! very good project

@Aarmadale 4 жыл бұрын

Paint the inside of the box with a thick layer of paint and add a strong magnet to the output to help with the contamination, and throw a gearbox on that handle!

@GarbageDevon 4 жыл бұрын

Great video! I have a Previous Plastic shredder. I find that using the shredder first, and then putting the plastic in a blender gives a small particle size. I love the design of the stackable sieves! I will try them out!

@maximilian.arnold 4 жыл бұрын

What a work out!

@adama1294 4 жыл бұрын

I would add some gearing to that lever.

@madisondrum9179 3 жыл бұрын

thank you! i was scared to buy it without seeing it first

@jeremyporterfield1611 3 жыл бұрын

Just watching this - your sieves look and operate very similar to the aggregate measuring sieves used in stone mining / quarrying operations. As a prior materials engineer, one thing to note is that sieve hole sizes only guarantee your pieces are less than the hole size for the 2nd longest side of any particular piece - if you think about it, you could get an infinitely long piece through one of the holes as long as the 2nd and 3rd dimension sizes are smaller than the sieve. Granted, the space between the sieves in your "sieve stack" will limit this somewhat, but it's something to keep in mind while processing. Great video - really enjoy your thorough testing!

@dimitar4y 2 ай бұрын

im sorry, but that lever... Oh my lord that lever. The effort. The sheer will.

@mikemckittrick7872 4 жыл бұрын

Greetings. Great video as usual. Here's a suggestion. Give yourself some mechanical advantage by adding a couple of gears. Perhaps a 3" dia gear at the shredder and driven by a 1" dia gear at the crank. Then you can reduce the length of the crank somewhat making it easier to crank while still having overall mechanical advantage.

@RobertNoronha Жыл бұрын

Excellent !!

@abbosbek7251 Жыл бұрын

Thank you CNC kitchen

@andyspoo2 4 жыл бұрын

With all the test prints you do, you probably create more waste than most 3D users. Recycling is the way to go for you.

@RomanoPRODUCTION 4 жыл бұрын

Ya ya ya Thank you Mr Kitchen ❤

@bobbylittle6996 4 жыл бұрын

I worked with an industrial shredder 25 years ago for a bit. You definitely need a flywheel for that small shredder. Also a hammer-mill style is much better design so that it can retract the cutting head. That way the cutter head still rotates and does not hang up. When I need electric motors, I use one from an old washing machine, there tuff and cheap or free. The motor uses V groove pulley so you can make a simple friction culch to engage the cutter head. In case of a catastrophic stop the belt will slip, very safe. The company that made that shredder could make a hammer-mill cutting head small enough to.

@SidneyCritic 4 жыл бұрын

Metal doesn't like rubbing especially stainless, it galls and picks up and gets worse, so it's best to fix the clearance.

@frozenprakash 2 жыл бұрын

5:58 First person every to tell the kW rather than in horses !! Wow, keep the great work : )

@Sandwich4321 4 жыл бұрын

You should add a big beefy gearbox to that

@time4sign 3 жыл бұрын

Thank you for sharing.

@john-lucdiazirizarry4524 4 жыл бұрын

Wow... I've never been this early! Sweet!

@sipandrei6403 4 жыл бұрын

Nice bike!

@chrisdixonstudios 3 жыл бұрын

An electric or manual boat trailer winch will easily crank the shredder! Your pellet extruder looks awesome..can't wait to see how you do that. Thanks for your efforts.

@pv8685 3 жыл бұрын

ich hab den titel gelesen und hab mir gedacht: "ach im leben dreht stefan den shredder nicht von hand durch". dann hab ich den riesen hebel gesehen und da war mir alles klar. bist echt ein genie auf deinem gebiet. weiter so!

@EugeneVanDerMill 4 жыл бұрын

Looks like a nice Workout

@MrFreon1990 4 жыл бұрын

I wish i could leave more than one likefor such wonderful video!

@handy-capoutdoors4063 2 жыл бұрын

Between this and the filliatruder I think I can make a fairly good recycling stand. Thank you. Can't wait to start making projects.

@wordreet 4 жыл бұрын

Ah, I see you used a spiral flute tap at first. They are the weakest type and not really suitable for manually starting a thread in steel. Normally a hand tapped hole will require 3 stages. A start (first) tap, which has a loooong taper, so that it aligns itself with the hole. Then a second tap to form most of the depth of the thread, and finally a finishing or bottoming tap to get as much depth as necessary. For anyone reading this, if the thread is required all the way through, then the finishing tap is not needed.

@hellelujahh 4 жыл бұрын

Thanks, this is some great advice!

@JustPlainGrey 4 жыл бұрын

I love this idea 😍. I have limited shop space and have limited funds but this it perfect 👌. Muscle is the way to go 💪. Thanks dude

@rickyh2896 4 жыл бұрын

would be super cool to see you build a gearbox for it! (probably not 3d printed but maybe a thick planetary gearbox might distribute the force enough to be partially 3d printed?)

@GregDaCrack 3 жыл бұрын

Du machst wirklich einen großartigen Job hier auf KZfaq. Der Erfolg sei dir gegönnt!

@mrMacGoover 6 ай бұрын

A simple reduction gear and built in hand crank would be from a boat winch that usually attach to the front of a boat trailer.

@trischas.2809 4 жыл бұрын

First of all, you could shorten the crank by using a star-gearing. You would need to crank twice as often though. This also would have the benefit of possibly not throwing around the machine. Then, you need to mount it to the bench sturdier, but for a first test, this loos good!

@VictorTereschenko 4 жыл бұрын

A lowering gearbox and a ratchet will be a nice addition

@nikond90ful1 4 жыл бұрын

Thanks for the video.

@Xenu321 Ай бұрын

I am thinking about doing something similar but for composting trash and garden material Thanks for sharing

@robertt9342 2 жыл бұрын

Seems like the flywheel you mentioned combined with some reduction gearing could make things a lot easier for you. Maybe include a spring mechanism to store energy too.

@manuelpadua2113 8 ай бұрын

Really late response but a quick fix for the metal shaving would be a magnet to sweep through it.

@Comatoasta 4 жыл бұрын

Get in touch with the guy that makes the Lego torture tests, where he takes lego engines and adds gear ratios to it to make it give a whole load more torque. that should be a small enough engine

@marksams1037 4 жыл бұрын

Man I want your Mauser calipers! Those are awesome

@DirkLarien 2 жыл бұрын

Dear Stefan. When you saw something, you smoothly pull and push back and forth. no downward pressure is needed.

@morrispicturestudios4458 2 жыл бұрын

One thing you can do is to use a small washing machine motor along with gears to cutdown the heavy work on the motor but make the torch higher.

@MixedGears 4 жыл бұрын

For your next project, you can shred PET bottles and try to 3D print. So we can find out, if we can save on filament =)

@andreyansimov5442 4 жыл бұрын

If you look at professional shredders, it is totally different mechanics, blades, blades config and tolerance. It means everything

@hypeedits558 4 жыл бұрын

You need more views and subs man!

@theunholyghoster4293 4 жыл бұрын

you should print some filament on the print bed from shredded material then shred it one more time to get even and soother print. that or make a cutter that takes the rough re-melted material and cuts it into the recommended size for you remelter another thing you can try is getting an arbor press and smashing all the prints you plan on recycling. this will make them thinner and easier to shread.

@agerken 4 жыл бұрын

Shredding benchys to print benchys that’s what I like to see!

@KwaterbugBUTCHER 2 жыл бұрын

You could get a small griddle and cook mats to remelt together the small bits that are to small to use , a strong magnet could pull out metal debris and garment vacuum(that pulls lint fluff off) could be enough for wood shaving

@ChrisRiley 4 жыл бұрын

That poor benchy...great video man, thanks!

@Jake_Productions 4 жыл бұрын

here is an idea. if you get a nut attached to the end of the input shaft you can use a large pneumatic impact gun to drive it. pneumatic impact guns can provide up to 1200 ft lbs of torque so it should work.

@birdmun 4 жыл бұрын

To help find the high spots you could always use permanent marker on the teeth and rotate the cutters then file at the scrubbed points to knock down the high spots. Rinse and repeat until you don't see any bald permanent marker spots after rotating.

@CNCKitchen 4 жыл бұрын

Good point! Should have thought about that.

@___echo___ 4 жыл бұрын

I cant wait for this to be refined and produced by larger companies in the future, if this works fdm will have the advantage over SLA as far as recyclability goes

@athermaqsood8309 2 жыл бұрын

Haha Nice! Now you definitely know the importance of motors :)))

@bigbearnelson 4 жыл бұрын

That's pretty cool. We make a lot of 3d printer waste in my school district and this would be great hooked up to a torque wrench from the shop.

@Barskor1 4 жыл бұрын

Normally unusable plastics can be mixed with sand and or gravel heated and molded to form tiles and bricks add some carbon dust for UV protection and color uniformity you can tile your roof pave your driveway, garden path, the back alley behind your home and so on.

@rodsnyder6020 4 жыл бұрын

Ive been thinking about doing this myself for quite a while now. It is just so tempting to make filament out of waste and print cool things with it. with these PET bottles you might not even have to add virgin material to the mix. Really cool! I guess you will add a gear to the handcrank? The way it is now you could charge people to use it for a workout in times of this toiletpaper-noodle-pandemic.

@3dprintingcave778 4 жыл бұрын

I really like this idea of reusing the plastics and wish more people and business would get involved and come up with a solution that works very easy and be very cheap, if we had something very easy and cheap u would have people maybe going out of there way to pick up plastic pieces like bottles and straws whatever,,, I don't know how a mixture of all sorts of different plastics would work in a 3d printer,, but thank you for doing a video on this and I hope u keep going with it and maybe more people like you will jump in

@joemulkerins5250 4 жыл бұрын

I have the same ongoing project. I think we are close to something great with recycling old waste plastic into new usable objects 😁

@yonggor 4 жыл бұрын

it's important for the shape of shredder to fit the uses. this shredder has huge but not so strong tooth, which should be good for breaking down thin and soft material quickly (i.e. polystyrene, pop can, cardboard). for 5mm chips and hand-cranked, the tooth profile should smaller and finer.

@BionicleFreek99 2 жыл бұрын

I feel like adding a bit of gearing to increase the torque would make this work a lot better.

@ftrueck 4 жыл бұрын

you can melt the small particles back to bigger chunks so you can re-shred them

@antonwinter630 4 жыл бұрын

thats fantastic. i didnt know about the PP marketplace.

@TheFreaxTux 4 жыл бұрын

I already have a full box of waste stacked up, even though I just want to do 3D printing as a hobbyist, and it's been less than 6 months I've had it. Most possible reason is that my printer is a DIY and wasn't ideally designed at first. I would definitely consider to buy one if I had a proper workshop myself!

@im1066 4 жыл бұрын

I'm curious to see the quality of the recycled prints with the pellet extruder, and if there are strength issues compared to the manufactured versions.

@wordreet 4 жыл бұрын

I'm saving all my failed prints anyway. When I have a few kilos, maybe I'll send it to you.

@Megabobster 4 жыл бұрын

What I've been doing is saving the boxes the filament spools come in and putting scrap/waste back into it. Mixed colors go in with black since it will affect the color less. I've only used PLA so far but mixed materials would likely not be reusable.

@wordreet 4 жыл бұрын

@@Megabobster Oh yeah, I didn't mention that it's all PLA.

@Akyomi777 4 жыл бұрын

@@wordreet also good thing about PLA filament is that its biodegradeable

@ratdetecting4780 4 жыл бұрын

Great vid. Am just waiting for shredder blades etc. to come back from being laser cut. Gives good ideas on low cost mods, if you don't have welder etc.

@klyddmeisters 3 жыл бұрын

add a massive flywheel that you spin up. And a flap so you can send down some materials when the flywheel is spinning fast.

@tna2me197 2 жыл бұрын

You should try mounting it to a geared down stationary bike. That would be awesome

@Fasel99 4 жыл бұрын

Sehr cool, dass du auf preciousplastic aufmerksam gemacht hast :) Ich bin auch schon eine Weile dabei, mir einen Schredder und Extruder zu bauen :) Mit den Plänen von preciousplastic

@rpnct 3 жыл бұрын

So benchy is also a benchmark for plastic shredders.

@Muzkaw 4 жыл бұрын

A planetary gearbox is quite compact and you could rotate the other end with your impact driver

@JanTec3D 4 жыл бұрын

nice!

@MixedGears 4 жыл бұрын

Precious plastics has started a nice recycling project. Shredding energie, reextruding energie, filtering, cleaning, I wonder how big of a shop you should have to make a sustainable business. For example my filament provider, doesn't recycle neither theirs clean scrap, cause plastics behave totaly different after the first heat, second, I guess overalll is a very challage thing to succede.

@diegomolinaf 4 жыл бұрын

Six months in the future, Stefan bumps into a friend: -Hi Stefan! Long time no see. What happened to you? You look like a bodybuilder! -I'm shredding plastic. -... WHAT?

@aman11283 4 жыл бұрын

You could go as far as to say at that point he'd be shredded.

@morphman86 2 жыл бұрын

As with so many other tutorials and showcases on KZfaq: "Today I will show you how I made this shredder. First step, buy a shredder."

@karlklops3810 4 жыл бұрын

Good Idea. but i think the big problem are the way to agressive teeth of the shredder. Thats why its so hard to crank. if you compare it with the tooth profile of industrial shredders, you see the difference. :)

@CNCKitchen 4 жыл бұрын

That's what I'm thinking as well. Though the long teeth grab the parts way more effective.