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Precious Plastic Åland

This topic contains 34 replies, has 8 voices, and was last updated by  Michael 8 months ago.

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Michael ashrak

Precious Plastic Åland

02/06/2017 at 09:47

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.

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helper
25/07/2017 at 10:10
4

Finally the laser-cut parts arrived!

Big thanks to @katharinaelleke for organizing the the group order!

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warrior
26/07/2017 at 08:50
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@ashrak, you’re welcome 🙂
Looking forward to seeing your shredder built!

helper
16/08/2017 at 17:14
5

Went and got some more materials to the shredder and extruder today 🙂

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warrior
16/08/2017 at 22:40
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@ashrak,

Nice to see the components ready! We are going to be ordering components soon as well, so please post about some challenges you may come along.

helper
17/08/2017 at 02:56
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@jegor-m

Yes, I will!

Next week I will get the shredder axle/shaft made by the guys at the workshop where I work, hopefully I have sanded the lasercut parts by then, so I can start assemble the shredder 🙂

helper
21/08/2017 at 11:21
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My wife caught me…. working!

My sanding machine broke down, so I acctually have to do some work :S

Trying to get the lasercut part sanded so I can get an exact measurement on the shredder axle/shaft.

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helper
22/08/2017 at 11:53
2

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.

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helper
05/09/2017 at 17:33
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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).

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helper
05/09/2017 at 17:36
1

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.

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warrior
05/09/2017 at 18:58
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@ashrak,

Michael, it’s good to see the shredder shaping up. The tooling photos are a nice bonus as well.

Have you got the motor already?

helper
06/09/2017 at 05:59
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Yeah, i got a used 2.2 kW motor and a 3 kW motor, got some reducers that hopefully can be fitted together with the motors. But for the shredder that I am building for Optinova I Think I will use a new motor with reducer 🙂

warrior
06/10/2017 at 22:56
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@ashrak, super nice to see the machines slowly coming together.
And I especially like that you show the community how basic the tools can be!
Keep it up! 🙂

helper
09/10/2017 at 15:49
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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 😛

helper
29/01/2018 at 04:51
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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.

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warrior
29/01/2018 at 09:35
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@ashrak,

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?

helper
29/01/2018 at 16:02
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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. 🙂

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warrior
30/01/2018 at 15:55
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@ashrak The jaw coupling is best if you can find one the right size. Better to use for the extruder as well if you can. A solid coupling needs to be very precisely aligned or it will cause problems (binding, jamming, flexing, wearing other components)

helper
17/02/2018 at 10:34
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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.

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new
17/02/2018 at 14:52
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Как можно получить схемы,или чертежи? Заранее спасибо.

helper
17/02/2018 at 17:55
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@ivanshtiru
You can find the blueprints for the machines in the download section here on the website, as for the frame, you might have to improvise a little depending on what motor you have.

dedicated
17/02/2018 at 23:31
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This coulb be a cheaper and good solution to coupling differen size of shaft, could be 19 to 24 or 24… it cost about 15€

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helper
18/02/2018 at 11:37
1

Thank you for the suggestion @fabirihotmail-com .

The jaw coupling I ordered costed just under 40€ for 3 sets, and also they allow for some misalignment. 🙂

dedicated
18/02/2018 at 17:29
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@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.

helper
19/02/2018 at 09:23
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@fabirihotmail-com
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 🙂

I found the jaw coupling on eBay https://www.ebay.com/itm/L-Jaw-Couplings-Complete-With-Element-Insert-Lovejoy-Couplings-L035-L050-150/162579511138?hash=item25da7e7762:m:mwB5sj68wFzCOfZCzhbs96Q

warrior
19/02/2018 at 14:11
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@ashrak

What size jaw coupling did you buy? The torque ratings don’t make much sense, but I would think you would need at least the L-090 for the shredder, better the L-099.

helper
19/02/2018 at 18:21
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@andyn

I was looking at the max bore sizes, and took the ones with 19 and 24mm (L070 & L075) just to discovered they all are 6 & 8mm. So they need to be rebored.

Yeah, the torque rating do not make much sense.

Got the couplings today, and will rebore them and try them.

helper
20/02/2018 at 16:50
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Had the jaw coupling rebored. Getting closer and closer to finishing the shredder.

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helper
24/02/2018 at 15:57
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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.

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helper
06/03/2018 at 15:59
1

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. 🙂

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warrior
10/03/2018 at 01:04
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We had some problems with our image uploader @ashrak, should be temp fixed now and properly next week Sorry for that. Nice process topic you have here! love it 😀

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