Forum Replies Created
You can run it with 230V or 460V, thou it is only 0.25 hp, and I think that would be to weak for the shredder.
1. Disasemble? but that could be a lot of work, clean out as best as you can and hope for the best?
2. I would presort the plastic by type and then color.
3. Non-stop. (depends on the engine)
4. Jaw coupling (as your image), allows for some misalignment.
Assembled the “Optinova” shredder unit, had some problem with the shredder jamming, spent some frustrating hours solving it. (do not rush and try to assemble the shredder unit fast, have patiance and take your time, when tighting the bolts, check if the axle spins, and make sure your bearings are the same (I had 3 slighly different bearing housing) )
Because I am doing this on my spare time, I usually only got like 1-2 hours each time. And because of the shredder unit problem, I did not get so much done as I hoped for.
Aligned the shredder unit and motor/gearbox on the frame, got some power tool failures.
Now there is the hopper and the electric part left to do.
Slowly getting there.
Yes, the fixed side will be 149mm (14 small knife and 13 large knives) and the rotating side will be 148mm (14 knives and 13 spacers), in theory.
In reality, the 5mm metal sheet that they cut the pieces from varies a bit, could be 4.8-5.2 or more/less, same thing with the 6mm sheet.
I just sanded my pieces quickly and made sure that the edges was clean and then I assembled the shredder without problems.
Small fixed knife (6mm) then large fixed knife (5mm) and repeat.
Rotating knife (5mm) then spacer (6mm) and repeat.
So one 5mm rotating knife fits into a space with 6mm.
Today I went and got the adapter for the motor, that the engineers from Optinova made. And it fitted perfect (awesome when something fits perfect and without problems on the first try 😛 )
Now I just need to reassemble the shredder unit, and then I can put the motor, shredder and frame together.
Slowly getting it done. 🙂
Hey @drakula16 and welcome!
The difference with using or not using stainless steel is that stainless is a bit harder (not a big issue), and it will not rust (bigger issue if your material that you are shredding is wet).
The motor is usually the hard part, finding the right one to a good price.
The best is to find a motor with reducer that gives you about 60rpm +/- 10.
In my case I did find a motor, and a separate reducer.
You can also use a chain drive.
Good luck with your build, and keep us up to date 🙂
Make sure that the bottom side is sturdy so the pressure will be equal, so the car jack (with one pressure point) will not bend the bottom.
Wow, good documentation, keep the good work up 🙂
Hey thats cool, what did it cost to build?
Do it work with all the recyclable plastic?
Or even with other plastics?
Well, for the shredder I would guess that you should use a particle filter, and for the extruder, injector and compressor I think you should use a gas filter. I would recommend using a half mask (thats what I am using).
But you could just use good ventilation with most of the termoplastics..
I edited the list..
This has been asked before.
List of hardware required for shredder
Here is the list on the nuts and screws (only for shredder 2.0 unit assembly) that I used.
Screw M10 (countersunk) x 30mm – 4pcs
Screw M8 x 25mm – 8pcs
Nut M10 – 6-8pcs (8pcs if using threaded rod)
Nut M8 – 8pcs
Washer M10 – 6-8pcs (8pcs if using threaded rod)
Washer M8 – 16pcs
Threaded rod/bolt M10 x 20cm – 2pcs
Instead of a threaded rod, I found 20cm long screws that I used, the nut can be nylock nuts, and the washers are optional.
The frame for the Optinova-shredder is more or less done, some paint and I need to change the bracket on the shredder unit. Now I am waiting for the guys at Optinova to lathe an adapter to the shredder-motor. Will be starting on making the hopper for the shredder.
About identifying plastic types.
This is from “User’s Guide to Plastic”, a book that is used in plastic related education.
Identifying plastic types by burning.
Material – Type of fire – Odor
ABS – Yellow flame with black smoke, drips – Very characteristic for ABS
PA-Nylon – Blue flame with yellow top, melts and drips with transparent and very fluid drops – Burnt wood
PC-Polycarbonate – Yellow flame with smoke, melts and chars
PE-Polyeten – Blue flame with yellow top, transparant drops that burns – Candles
POM-Acetalplastic – Blue flame without smoke – Ammonia
PP-Polypropen – Blue flame with yellow top, swells and drips – Sweet/Wool
PS – Yellow flame, with black sooting smoke – Citygas (?)
PVC – Yellow flame with green edges, softens – Sulphuracid
SAN – Yellow with black sooting smoke
low-density polyethylene is typically 105 to 115 °C
I think this info exist in an other post, about plastic materials in the forums.
Here is one: https://davehakkens.nl/community/forums/topic/types-of-plastic/
Sorry jegor-m for hijacking your post :S
Had the jaw coupling rebored. Getting closer and closer to finishing the shredder.
Hello there @lexuz and welcome!
We got some estonians here, @jegor-m with Precious Plastic Estonia.
As for recyling cable isolation;
If I understood it right there are 3 common types of plastic used for isolation in electric cables PVC, PUR and TPE.
TPE could be recycled
PUR can be recycled chemically
PVC (most common in cable isolation) is recyclable, but when heated PVC can produce dangerous fumes.