Precious Plastic Åland
Finally got my thumb out.. And made a page on Facebook https://www.facebook.com/preciousplasticaland/ it is in Swedish and English.
Our first project is to build a shredder and a extruder to recycle 3D-prints for Optinova. (The Optinova Group is one of the leading global suppliers of advanced tubing solutions for the global medical device industry)
Will share the development and solutions here on the forum and on our FB page.
Did some more sanding and grinding, I did not need to do so much sanding on the parts, but I did need to use a small metal file (rasp) on the holes (first image).
Also did some preassembly to check that everything fits correctly. (second image)
Now I am waiting for the axle/shaft to get done.
Thank you @jegor-m for the advice to stack the blades to check the combined width, my axle/shaft will be 149 mm instead of 148 mm.Toggle replies
Alright, I have not had so much time working with the shredder, but yesterday I did some hours of work.
The guys at the workshop at my work did a great job with the axle/shaft. If you are going to have someone else make your axle/shaft for you, I recommend you also bring one of the bearings with you, so you get a perfect fit.
The assembly with almost without problems, only one of the countersunk holes in the sideplate for the bearing was not deep enough, also I needed to use some washers/spacers between the side plate and the bearings.
I am going to change some of the screws to shorter ones (not needed but it will look nicer).Toggle replies
Also I tried to use as basic tools as I could, and noticed that you do not need so many tools. (this is for assemble the shredder)
Angle grinder, powerdrill, drill stand, vice, countersink (up to 20.5 mm or you can use a big drill), small files/rasps, rubber hammer, center punch, drills (10.5 mm & 9 mm), spanners (in my case 15 mm & 17 mm) threading tap (M5). And protective gear of course.
Thank you @katharinaelleke !
It is a really slow going atm, about to make the frame, but we are about to start installing floor heating in the house, so my workspace is filled up with other stuff right now.
Yeah, you do not need advanced Tools to asseble it, thou it would help making it easier 😛Toggle replies
Okey, so this hold up was a bit longer than expected, but now after some house renovation, broken sewer pipe and a surgery, things are starting to happen again.
After some days fighting with faulty equipment and tools, I finally manage to weld some frames (first image).
Also I will list what tool I used (second image).
Angle grinder (grinding disc and cutting disc), measuring tape, L-square/set-square, wire-brush, (cinder) hammer, welding machine (Arc-welder/stick welder) and of course safety equipment (googles, ear protection, gloves, welding mask.Toggle replies
Nicely done! I like how you add the tooling used as well.
You even use ear protection. An HSE engineer would be proud of you 🙂.
On the side note, I’ve seen some guys use the same motor and reducer to run both the shredder and the extruder. What is RPM of your reducer like? Any plans for making an interchangeable system?Toggle replies
Yes @jegor-m , I do use them 😛 I want to be able to listen to my kids in the future 😀
The motor I am using is a 3-phase 2.2kW with 2820rpm and a 60/1 reducer, so that leaves me with about 47rmp on the shredder. I found these on the scrapyard and it cost me about 30€ I think, need to connect the motor and reducer somehow (think i will be going for the idea Dave used to connect the extruder and motor (first image), and then a jaw coupling for the shredder and reducer (second image) ).
I do not have any plans on making an interchangeable system, because I got a bunch of used motors and reducers.
But if I would find an suitable motor with reducer and a VFD, then I might look into the option on trying a interchangeable system.
And as for the tools, it is for others that are getting started and need to know what to get/buy. 🙂Toggle replies
Small update, have ordered the jaw coupling for my shredder and gotten the motor with reducer from Optinova.
The motor is a used one in good condition from Lenze.
The interesting part is that it is only 1kW at 400v 87Hz, but gives 262Nm @ 35rpm.
The engineers say it should work…
Also sketched up the frame with shredder and motor (without electic box, hopper and shelves) during my lunch.Toggle replies
@ashrak Wheere did you buy this coupling so cheap? Usually it cost about 30€ each….
The coupling in the photo is to change shaft diameter usually from 19 to 24 that is the most common size for gear reductors, if there is no shaft (male) you put the shredder shaft directly inside the gear reductor hole.Toggle replies
Oh now I see! Thanks, I will need to do that with the Optinova motor, but luckily the guys at the Optinova workshop said they will lathe one for me 🙂
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. 🙂Toggle replies
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