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helper
26/09/2017 at 22:53
0

@bboyjp

Carbon steel drill will work just fine.

helper
20/09/2017 at 22:58
0

Hello @juanbravo1992 !

I will try to answer your questions.

1.
A motor with lower then 1.5-2kW seems to be to weak for shredding thicker plastic (thou this depend on your reducer).
You can use a motor with higher power then 2kW, but they usually cost more, and is most likly to be 3-phased. Most households do not have 3-phase current.

2.
I believe that this was the best/most functional design to use. Others were tried, but this seemed to be the best. @davehakkens may know this?

If you shredd to fast the plastic can start to melt, and if you shredd slower then well, it goes slow…

I am aiming for something between 40-60 rpm for my shredder.

Hope this help you.

helper
20/09/2017 at 21:18
0

@jrizzato
Try to get as close as you can, I got a barrel with 20mm ID and a 20mm drill, this is really tight, need to sand the barrel and/or the drill a little..

It is a good idea to have some thickness on the wall of the barrel, my barrel got 4mm walls.

The 34.9×1.2 pipe would be the best of those of your two options.

helper
19/09/2017 at 22:12
3

@adidasmakerlab

Awesome!

helper
19/09/2017 at 22:09
0

@carlf
Great idea using acrylic molds! And nice cloth peg!

helper
19/09/2017 at 21:29
3

@jegor-m
About the alu. can melting, tried to cool it down fast?

helper
13/09/2017 at 07:07
2

Thank you, @flo-2 & @jegor-m !

That will be a great help in choosing the motor & reducer.

helper
12/09/2017 at 07:31
1

So, the questions should be, how much torque do you need?

I acctually got that question from the guys in R&D on Optinova when I asked for a motor…

helper
06/09/2017 at 05:59
0

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 🙂

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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helper
05/09/2017 at 17:33
0

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 17:04
0

The most particular thing is that our central dump is located in the crater of a volcano and every windy day we get a volcano that spits out plastic bags, literally.

I know its horrible, but I did laugh when I read it, now I got an image in my head of a volcano erupting plastic…

In reply to: Shredder r

helper
03/09/2017 at 09:23
1

Nice, did that myself erlier 🙂

Remember to check that the blades fit to 🙂

In reply to: Shredding #5 plastics

helper
26/08/2017 at 09:49
0

Thank you @jegor-m for the advice!

I got a lot of PP ready to be shredded once the shredder is finished 🙂

In reply to: Shredding #5 plastics

helper
26/08/2017 at 08:09
0

@sustainablewares

#5 – PP – Polypropylene.

Should not be a problem, many seems to use the shredder to shredd PP, When my shredder is done I will use it to shredd PP.

In reply to: New website V3

helper
23/08/2017 at 19:44
0

Yes, a link to the forums… (like the links, “home” – “the plan” – “machines” – and so on…)

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
21/08/2017 at 15:15
2

Looking good.

helper
21/08/2017 at 11:21
1

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
17/08/2017 at 02:56
0

@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
16/08/2017 at 17:14
5

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

Attachments:

In reply to: Handbook for shredder?

helper
16/08/2017 at 04:10
0

Hello @simtwo !

You can find the blueprints and info on all the machines here:

https://preciousplastic.com/en/videos/download/

helper
15/08/2017 at 04:55
0

Stainless Steel would be hte best, but you can make it in carbon steel to..

helper
15/08/2017 at 02:51
1

Good luck @iago !

In reply to: band heaters

helper
15/08/2017 at 00:13
0

Should not be a problem as long as your power supply can handle it..

helper
15/08/2017 at 00:03
4

Hey @iago !
It is a bearing (rolamento), this type of bearing got many names, Mounted bearing, Pillow Block bearing, Flange Bearing or a mixture of those name, technical name is “UCFL 204”.

Here is one from AliExpress with a good price; https://www.aliexpress.com/item/FL204-20mm-Bore-Self-aligning-Flange-Bearing-UC204/32795341714.html?spm=a2g0s.9042311.0.0.wH1S84

helper
13/08/2017 at 23:54
0

I think he is using the extruder and then some cutter machine?

In reply to: Fidget Spinner craze

helper
10/08/2017 at 21:25
1

use the fidget spinner craze to inspire tomorrow’s makers and engineers.

Thats so right @peterbug

helper
09/08/2017 at 23:34
0

Great idea!

Will try to guesting it!

Viewing 30 replies - 61 through 90 (of 129 total)