Forum Replies Created

Viewing 30 replies - 1,111 through 1,140 (of 1,149 total)
sort on most likes
warrior
17/05/2016 at 17:52
0

Well, cigarette filters are made of cellulose, so I believe they could be recycled to create paper or cardboard, but not plastic.
They probably make plastic using the external package wrapper only 😀

Attachments:
warrior
17/05/2016 at 17:47
0

Welcome @rahmatgozali 😀

warrior
17/05/2016 at 17:46
0

Welcome @afsyah

warrior
17/05/2016 at 17:45
0

Welcome @yolande 😀

warrior
17/05/2016 at 17:45
4

I will share my shredder as soon as I complete it, I had a hard time finding an affordable motorreductor, but finally, I was able to get in contact with someone who has a 1/2 monophasic motorreductor that doesn’t require me to sell a kidney.
There is a chance that this motor doesn’t work (and that I waste a lot of money) considering that the recommended motor power is 2KW (around 2.6HP) and the motor I’m getting is only half HP, but if it works, I will let you know so that other people can opt for a cheaper motor.

Just to give you an idea of how expensive those motors are down here in Costa Rica:

*2HP Monophasic 220v motorreductor (new): $1582
*1.5HP Monophasic 220v motorreductor (used): $1016
*1HP Monophasic 220v motorreductor (new): $1484
*1/2HP Monophasic 110v motorreductor (used, the one I’m about to purchase): $300

I found a video of a guy who used an 1/2HP motorreductor for an elevator, and it’s capable of lifting 100 kilos, so I assume 1/2HP should be more than enough to shred plastic.

In reply to: Hello from Bogor

warrior
17/05/2016 at 17:24
0

Welcome @mrastra
I actually had to google “Bogor” to know where it was located 😀

In reply to: Howdy From Texas!

warrior
17/05/2016 at 03:41
0

Welcome @cadena 😀

In reply to: Hello from Costa Rica

warrior
17/05/2016 at 03:40
0

Eso compa, bienvenido 😉

In reply to: Hello form Texas

warrior
17/05/2016 at 03:36
0

Welcome @johnd
@timmy is from texas as well, you might help each other with the machines construction:

Who needs a shredder?

In reply to: Hello from Brazil

warrior
17/05/2016 at 03:35
0

Welcome @renatocamargo 😀

warrior
17/05/2016 at 03:32
0

Welcome @tyoolip 😀

warrior
17/05/2016 at 03:21
0

Both plastics can be recycled, but you would need to experiment with melting both kinds of plastics to see how the final product could behave.

Here are a few resources:

EVA melting point: 250°F (96°C)

Rubber melting point: 356°F (180°C) or 750°F~1000°F if it’s tires/vulcanized rubber When you melt rubber, it “Devulcanizes“, which means it loses elasticity and will need to be vulcanized again depending on what you want to do with the final rubber product. Also, melting vulcanized rubber releases toxic gases that are highly contaminant for the environment, and can affect your health if you breath the fumes.

In reply to: Who needs a shredder?

warrior
17/05/2016 at 03:07
0

Looking forward to hear back from you 😀

warrior
16/05/2016 at 20:52
1

Another idea:

Once the water used to wash your plastic get’s dirty, you can clean it first with a thin mesh to remove any solids, and then evaporate and condensate the water to make it clean again. Building an evaporator should not be complicated or costly. You just need to add a resistor on one of your recipients (the one with dirty water) to heat the water and start the evaporation process, and then a tube that transports and cools down that vapor to be deposited into another container.

warrior
16/05/2016 at 19:24
0

@cotrini7 disculpa la respuesta tardía. Preferiblemente debes usar un motor monofásico. Los motores monofásicos pueden ser conectados a las tomas eléctricas de 110v o 220v de las casas, mientras que un motor trifásico requiere de una instalación eléctrica especial que normalmente solo se encuentra en talleres de electromecánica.

In reply to: Making the Shredder

warrior
16/05/2016 at 19:10
0

@drillbit Look at Timmy’s reply on this thread

Looking for a machine builder or CNC cutter for Shredder – Saint Paul, MN

warrior
16/05/2016 at 19:00
1

Yes, some plastics release gases that are not deadly, but irritant for your eyes. I would be more concerned about how clean is your plastic, and not how toxic it might be. For instance, I would not eat from a plate/cup/spoon made with recycled bottles that you got from a sewer.

Plastics only release gases (contaminants) when they are heated, and not all plastics release such gases. Once the plastic cools down, it is safe to be used for food consumption. Just as a security measure, you might want to clean your final plastic products with a mix of isopropyl alcohol + water + 1 drop of chlorine, to make sure they are as sterile as possible.

warrior
16/05/2016 at 17:52
0

The bigger pieces will continue to rotate inside of the shredder until they are small enough to pass through the mesh

warrior
13/05/2016 at 00:47
0

@cadena Look at Timmy’s reply on this thread

Looking for a machine builder or CNC cutter for Shredder – Saint Paul, MN

warrior
13/05/2016 at 00:46
0

Look at those colors <3

warrior
13/05/2016 at 00:33
0

One way would be to use an Oven to melt the plastic into a thin sheet, wait for it to cooldown, then crack it with a hammer, and shred it again.

warrior
13/05/2016 at 00:32
0

Here’s an idea. Pour some concrete in a wooden or plastic box, then cover it with a plastic bag or a sheet of thin plastic. Rub your door knob with oil or grease and then insert half of the door knob, over the plastic covered concrete. Finally, pour more concrete to cover the top half of the door knob. Once the concrete is dry, you can take the top “concrete mold” part, remove your door knob, fill any holes in the concrete to make the interior smooth, and there you have it.

The end result should look somewhat like this:

Attachments:

In reply to: Shredder motor

warrior
13/05/2016 at 00:24
4

Just fyi, normally, the worm gearbox (Motor reductor) costs more than the motor itself. You will not find a motor with less than 1000rpm in the market, so you will need to buy a reductor, or buy a motor with the reductor preinstalled, or build your own reductor with pulley belts like this one:

warrior
13/05/2016 at 00:21
0

@godpepper just to give you an idea, I spent $300 in the motor with a reductor, plus $400 for the laser cutted parts, plus the cost of making the frame either in Wood or Metal. The only way a project like this could be affordable, is if you have access to scrapyards (which are virtually non-existent in Costa Rica) 😉

In reply to: samples

warrior
13/05/2016 at 00:15
0

I believe you can look at what other people are creating in the “Share your plastic creations” subforum and ask them directly 😉

warrior
12/05/2016 at 20:44
0

I saw this post a few weeks ago and was hoping that someone would provide an answer, but it looks like no one else has experimented with different motors.
The basic requirements of the motor are:
*Needs to be strong
*Needs to be slow

In my personal opinion, “Strong” means 1/4HP or more. A washing machine motor usually has 1/4 horse power

Next question, once you have the motor, how can you make it go slow?
The only answer to this is either getting a reductor and adapting it to your motor, or building your own reductor with a pulleys system, like these guys did:

Pulleys RPM calculator: http://www.blocklayer.com/pulley-belteng.aspx

I decided to just go ahead and buy a 1/2hp motor that already comes with it’s own reductor, like the one Dave used on his Shredder video. It wasn’t cheap (almost $300 motor + reductor), but it was the less painful way to get the motor I needed

warrior
11/05/2016 at 20:59
2

I’m from Costa Rica and I’m building the Shredder and the Extruder. I’m not a metal worker and don’t have any machines to help you myself, but I can share all I have learned and researched so far.

My email is: [email protected]

Just as a heads-up, as you probably know already, Costa Rica is an expensive place to buy pretty much anything. So if you are thinking about making a Shredder, the costs involved will probably be the same as buying a professional shredder in US and shipping it by Sea to Costa Rica. I requested a quotation of the Shredder blades to a plasma cutting company in San Jose named “CEC” http://plasmacut.cr, and just those metal parts would cost me $500 plus another ~$350 for the motor with reductor, plus the costs of building the frame.

For the other machines (Filament extruder, compresion, injection) you can buy many of the parts in any local hardware store like “EPA” or “El Lagar”, and any parts you can’t find here, you can get them from Amazon and ship them to Costa Rica with http://smartcouriercr.com/ or any other PO BOX Company.

warrior
11/05/2016 at 20:48
0

It’s simple. A round Tube with this measures 34x26x4MM means that it has a thickness of 4mm, the external diameter is 34mm and the internal diameter is 26mm

A = 34mm
B = 26mm
C = 4mm

The dimensions doesn’t have to be exact, but make sure that the drill fits perfectly inside of the tube, which means that the Internal dimension (B) is the most important to consider.

Viewing 30 replies - 1,111 through 1,140 (of 1,149 total)