Plastic Shredder
| MachineInfoBox Plastic Shredder | |
|---|---|
| |
| Synonyms: | DE: Kunststoffschredder, Plastikschredder, Kunststoffschneidmühle, Plastikschneidmühle |
| Material: | plastics |
| Access Requirements: | Plastic Shredder Introduction |
| Manual: | preciousplastic.com (build instructions) |
| Tutors: | Lukas NitramLegov |
This machine is still under construction, but over time the page should contain more and more information!
The shredder is the first machine we are building for the Precious Plastic project as all the other machines require small, somewhat uniform pieces of plastic as their raw material.
We should remember to take some photos with each step, so that we can put together a nice build log like this one in the end!
Materials
Armin got the laser cut parts and two flange bearings; they are in a box in the metal workshop.
Lukas contributed a piece of 27 mm (Schlüsselweite) hexagonal steel.
Components:
- 3 kW, approx. 1500 rpm Drehstrom-Asynchron-Motor
- gearbox: 20:1
- electronic components:
- emergency stop: TBD (similar to the one at the CNC router)
- 1xMotorschutzschalter 6,3-10A Gekauftes Modell:
- 2xLeißtungsschutzschalter mit Hilfskontakten Gekauftes Modell: DIL EM 01 G mit 22 DIL E
- 2xLeuchttaster für rechts- linkslauf
- Stopp Taster
- 3Phasen Hauptschalter
Missing:
- electronic components:
- z.b.Gehäuse mit Hutschiene
- z.b. Netzteil 230v zu 24V Output:>500mA
- hopper cover safety switch (should stop motor when open)
We have a small selection of perforated metal plate (Lochblech) that could be adapted (cut and perhaps re-drilled) to be the "sieves" determining the particle size that comes out of the shredder.
Other materials include threaded rods and other metal parts that we should already have at the Space.
Tasks
The following tasks should be sufficient in order to assemble the shredder. If everybody is fine with github, we can also move this task list into a project on github. Please contact Martin if you want this to be done.
| Number | Relevant Part | Task | Status | Responsible | possible tools |
|---|---|---|---|---|---|
| 1 | Shredder | Buy laser cut parts for the shredder itself | Done | Armin | - |
| 2 | Shredder | Buy the hexagonal Steel | Done | Lukas | - |
| 3 | Shredder | Adjust the hexagonal steel | Done | Johannes, Armin | Metal Lathe |
| 4 | Shredder | Assemble the Shredder | Done | Flor | - |
| 4.1 | Shredder | sharpen the blades | mostly(?) done | Flor, Armin | bench grinder |
| 4.2 | Shredder | harden the blades | not started | who else would like to help? | Luca's & Chris' furnace?! |
| 5 | Shredder | weld the assembled shredder parts together | Done | Luzian | Welding Transformer |
| 6 | Shredder | make a hand crank for first tests | Done | - | |
| 7 | Motor | set up suitable motor - we have a motor (3 kW, 1500 rpm) and ordered a gear box (target speed approx. 70 rpm), they need to be mated | Done | Johannes, Lukas | hacksaw & clamps as makeshift gear puller |
| 8 | Motor | attach the gearbox to the shredder axis | Done | who else would like to help? | metal lathe |
| 9 | Motor | switches - select & install an emergency stop, direction selector and a Motorschutzschalter | Done | Johannes, who else would like to help? | - |
| 10 | Framework | design the framework | Done | Armin, who else would like to help? | - |
| 11 | Framework | buy the needed parts | Done | who else would like to help? | - |
| 12 | Framework | Assemble the framework | Done | who else would like to help? | Welding Transformer |
| 13 | Hopper | Decide on the Material | Done (all metal, window could be added later) | - | - |
| 14 | Hopper | Assemble the hopper | Done | Flor | Welding Transformer |
| 15 | Hopper | add a clear cover and a safety switch (endstop) that recognizes when the cover is open
|
Done | who else would like to help? | - |
| 16 | Overall | put it all together.
Mount it to table and create particle size filter. |
Done | who else would like to help? | - |
| 17 | Overall | security check, define the introduction | In progress | at least 1 manager, who else would like to help? | - |
Vorläufiger Strohmlaufplan:
