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Hi @friedrich, this look great! especially for small prototypes and testing, have you got a CAD for this yet? I scored a very old but very tough drill press for a carton of beer a few weeks ago (mine was newer but I seem to have killed it!)
I would love to try this out. 🙂 the drill press does a tiny bit of work in our workshop, this would make it much more useful too.
Thanks for all that info…although most of it goes over my head.
In Australia we have some pretty strong regulations around elecrical equipment and the safety requirements for a school here seem to change in each state which is why we build “to order”. (What suits one group is not suitable for another group)
But…. every state has one thing in common as a safety feature and that is that the hopper cannot be removed “by hand” it must require a tool, those luggage clips would not pass safety requirements here. (We use nut and bolt, its 10 seconds to undo but requires a spanner so little fingers cant open it by accident)
Worksafe (our local safety officers) came through our work space to asses safety for school groups/community tours, I would be happy to share their report and recommendations if it is any use to anyone?
I think you are doing a great job btw, and I dont expect you to make things work for Australia (that’s my job and my electricians job) but I thought it might be useful info for other Aussies.
Good luck with your network connections 🙂 I look forward to hearing your thoughts.
@PPme I just re-read the OP and I should be posting this as a new topic so I am moving it there. 🙂 will copy the conversation as it is so far so its not doubling up.
@ppme I am not sure how mining is confusing but the definition is: The extraction of minerals or other materials from the Earth, usually from an ore body, lode, vein, seam etc, but in this case, a landfill.
I guess I see it differently – the industries around plastic manufacturing are well established and the processes are pretty much setup. This didnt just get started.
I am fully aware that what I propose can’t be done just with these machines but I thought this thread was for ideas that did not necessarily use PP machines so shared it here.
I guess it always will come back to the limitations of these particular machines for some people. (I got the same response when I shared the fact we have been asked to see if we can provide 57 million bio-balls to a local fish farm… regardless its a great project that would see a lot of recycled plastic replace the need for new materials and provide jobs here in our local community0, all some folks could do was harp about PP machine limitations!).
The thing with PPmachines is they use the exact same processes the “big boys” do – just scaled down for more accessibility, so I have absolutly no problem moving a different brand/flavour/type into my workshop if it meets the end goal.
Please look outside the PP box, I would really like to hear your thoughts on this if the machinery was NOT the issue – which it isnt, all of the necessary machinery already exists in commercial form – I just want to divert it’s use to mining plastic rather than minerals but at this point cant see a way to make it “float” (pun intended)
I wan to mine landfill sites for plastic waste…
I don’t know how (some kind of floatation process maybe) but I am in my 50’s and deeply aware of the 50 years of plastic I am leaving behind and the damage this plastic could do once it breaks downinto microplastics.
maybe if we could make it valuable enough then maybe we could encourage industries to mine it back out?
Thoughts? Am I completely nuts or could this be done and how??
These could easily be made by injection but the molds need to be made. Are you ok to pay for the molds?
Cant wait to see your results Adzie, someone donated us an old ironing press, I modified it a bit so it wouldnt switch off when it got ho and made some half decent sheets in a quick experiment.
My only suggestion would be, use thin tin sheets to sandwich the shred inside the press and then when you take it out, put it under a flat weight. The thin sheet wont take much extra time to heat up but it will help the plastic cool slower. This worked in my little experiment (wish I took pics now!) to stop it curling/buckling as it cooled.
I should add… we aussies are an innovative lot and I hope to see machine improvements and innovations over time too, connecting with each other means this knowledge is shared and new endeavours can be supported. <3
It isnt a plan, just a hope 🙂
Hmm… I hear you and I can see your points and you are right, it is all about the end goal 🙂
For me, the end goal is simply to have a one stop spot to find connections to the community for those already looking ($1 for every post I see that says “is there anyone in sydney/melbourne etc”… I would be wealthy enough for all 4 machines plus version 4 lol)
I have no 5 year plan for a community I did not establish, only a 5 year plan to work hard to support that community.
What you suggest is more in the line of promoting to a wider audience but this is simply a tool for the existing and growing community to use. The community themselves are doing all the promoting 🙂 – DJ’ing their own experience.
If someone coms along who wants to do more (or better) , they can jump on in. For now this is what I offer based on my own time, skills, $$$ for registration etc
reply @ppboys Thanks!
I really pondered on this and how to do it best and for now, I think simple works 🙂
I also wanted to moderate it a bit so we dont have lots of links who don’t respond after a while and did not want to reinvent the wheel you guys already built so well, so it all links back to the original PP site, the new discord etc.
Over time I would like to add events to the map and very happy to add suppliers as the community recomends them but so far firepants in Adelaide (Laser cutting) and myself are the only suppliers I can find for Aus.
reply @cartlintech I am hosting it as an addon behind my own site so there is no additional cost and I have loads of bandwidth (this site uses very little)
If you are curious, you can ping or you could just ask me 🙂 I am hosted with VentraIP and have been for quite a few years now. (Also located in a secure data centre in Brisbane) Very happy with their service and support – Ive built 18 sites with them so far (for other people) as well as my own and now this one.
If, over time the Australian PP Community want me to shift it or register differently then we can develop further. The .com.au is currently registered to my ABN. When the community gets big enough to register as an org, this can tranfer to the orgs ABN/IBR. For now, this is just a wee gifty to all of us to help out <3
Rachel, that is your call really. PPboys is right about what tools and skills you will need. You need to decide what is best for your situation. DIY will save money if you have the tools/skills but could end up costing a lot more if you have to set up a workshop first.
I can supply custom molds if you have the cad/design files, to a max depth of 20mm
My email if you need more info is [email protected].
I have sent one over to Remida/Jellyfish plastics, along with two injection machines. Preparing another set now for a school in Perth. I am not sure where to source parts there but happy to help you suss it out.
Which bit do you need?
I am in Darwin but happy to help you get started. I build the machines here, the injection machine being the simplest mechanically. I have listed injection machines in the Bazaar (MoreThanTencents) if you just want to buy outright, as well as molds but if you want to build your own I would be happy to offer support and help.
I do know of one guy on the Sunshine Coast (Chris Morrison are you here?) who is getting a space up and running and building their own machines but I am not sure how to tag him on this post 🙂 not sure how far along he is but check the map, he was on there and does respond to messages.
I don’t think your age makes any difference, it is a great project to start and it is not technically difficult but will take lots of trial and error to get what you want and that is all part of the adventure 🙂 go for it!
Tropical Darwin here, we share some challenges including humidity messing with filaments etc. Darwin Plastic Makers Space is just about ready to start work in their space and are planning exactly what you describe – a recycled washing machine and tumble dryer.
The waste water which is likely to contain small plastic particles will go to a settling tank with a fliter (stage one) and then will be pumped through another filter before being used again as pre rinse (before washing) or to water small trees we are planting and gifting to help offset our carbon footprint.
Just the question I came here to ask!
I am just assembling our extruder and want to make blocks/tiles with it (as well as extruded things) and am working on some mold designs, I have a thought that the molds need release holes because the extruded plastic will keep flowing under pressure and I could see this might be dangerous (or at least problematic)
I did see some post on here from someone already doing this but I cant find it now? In theory, there is no reason it wont work, just needs the right vision and design 😉
For the whole shredder it depends how you assemble it (We mount ours differently with the motor beneath the bench so its not the same) but for the shredder box Z(blade assembly) we use:
4 x 10mmx25mm (countersunk for bearings)
8 x 8mm x25mm + Nuts (Box sides)
4 x 6mm x 25mm (sieve)
You also need 4 x 10mm nuts for the threaded rod.
Hope that helps
I have just gotten round to thanking you for this tool!
We used it in the very beginning when looking at shredder motors, we finally settled on a 2.2kw 4 pole single phase with a 25:1 reduction after consulting our supplier and your handy dandy xcel tool.
Great job, great tool! Thank you
I have been a bit flat out, sorry not to respond quicker.
We had a talk with our metal supplier about hardened steel, there is no problem to make this and it is actually a little cheaper but he didnt think it would make much difference to the wear? We are going to build one in hardened steel and see how it goes and we can make them if someone asks but for now all our orders are for stainless.
My build times rely on a team of folks who have different timelines 🙂 not sure it would be helpful for anyone else but for the shredder box, once everything is in one place (laser cut parts, axle, sieve, bearings, bolts, anlges) then it only takes a couple of hours to clean up the parts and assemble and then under an hour to weld the end boxes and seive.
With everything in place for a complete machine, (shredder box already assembled) assembling everything else only takes a few hours, the longest (timewise) part of the machine build is cutting and welding/bolting the frame and waiting for the electrician to wire it all up.
Testing and adjusting – It is great when you flick the switch and everything just works (surprisingly, most of the time!)- when this doesn’t happen as it should, adjusting and getting it right can take some time. I spent around 16hours on the box I mentioned above when it was plasma cut, just sanding and fitting.
My partner has been exploring laser cutters so we can do this ourselves but I think it will be a long time before we can afford this. He is enjoying looking, I don’t want to slow his excitement 😉 The guys we use now are brilliant and happy to work with us on customisation or changes to the plans so it works this way for us, for now.
The blades are not ready yet, I just put all the parts together when I took a break and liked how they looked so I took a pic… Will upload another pic when this one is finished for you to have a look and approve the blades 😉
As for plasma being cheaper, as I said in my post, for us here, plasma was $80 more expensive so it may be worth shopping around your area?
As for a “proper setup” yep, my fabricator has all that and I have access to all the workshop tools I need but for the for average joe, making these shredders in their shed -a drill press and lathe for example are not something they might have access to.
This post is for them.
Good morning, Well done on your first melt G!
For the record, More Than Ten Cents is based in Darwin 😉 we don’t mind shipping the machines around Australia.
We are also starting a plastic makers space here in Darwin, similar but a little different to the original PP setup. The plan is a community space anyone can come and explore/use and to also run education sessions and makers workshops. (kind of like a Men’s Shed but different)
My suggestion to you guys in Sydney is to decide what you want to do (do you want a community space or a workshop for you self?) Once you have a plan, run with it, tell everyone you meet what your plan is, badger your local member for support, show folks the PP videos to explain your plan and watch the magic happen.
We have been really humbled by the support we have been given and these kinds of initiatives are obviously something the wider Australian community supports.
Our goal is to help communities establish 100 plastic makers spaces across Australia by This time next year 😀
I would prefer that, then at least you have someone to verify what you are doing and maybe ask some questions.
I contacted Standards Australia when we first started this project and they just directed me to the above standard. The standard is great in a lot of ways for assessing and minimising risk and defining procedures and policies but it is not really what I was hoping for.
I have even spoken with consumer affairs who handle complaints when products fail (thinking maybe they must map products against something?) but no luck there either.
@sonik that is not actually what I said…
I am very aware of OHS requirements in a workplace setting, as are the fabricators and engineer I have working on the shredders and this is why we have added the modifications I mentioned in my post and are looking at further modifications in future batches. (Also, all our machines are tested and electrically tagged by a licensed electrician before shipping.)
To inform these design changes we drew on the Australian Standard AS/NZS 4024.1201:2014: Safety of machinery – General principles for design – Risk assessment and risk reduction but this is not a system of compliance it is a guide.
I make no secret that we are a work in progress and I sincerely hope we never stop trying to improve both our design and our practices but it would be a little easier if there were some system of compliance (like an ISO standard) that we could map our machines against.
We purchased 3 shredders with different kinds of blades in our quest to shred plastic before we found this site. None of these were successful and we actually blew the motors up on two of them.
We also killed 2 household blenders (tried with and without water) and an officeworks CD shredder (I actually thought this was going to work but it just clogged constantly)
I forgot to add, one of the hopper designs we are still considering for our next batch has a bend in it which means the blades can’t be reached from the top of the hopper.
The issue of the spinning axle is another safety concern we address with a simple cover.
We are building the shredder for commercial sale here in Darwin and the higher hopper and kill switch are very important, we are also adding some safety/warning signage.
Monash University in Melbourne Australia have been working on exactly this idea and launched their machine about a week ago. They are marked on the Precious Plastic map and I am sure they would be very helpful if you reached out to them.
So… at this point in this discussion, stainless is not recommended but hardened steel is ok?
I have been speaking with our metal supplier and it seems hardened steel is not difficult for us to switch to if this is necessary and possibly it will make the machines final price cheaper. We have been working with 400 stainless steel so far but for machines we sell we would like to be sure we are making the best effort we can to provide a good, durable product.
This post took me by surprise I must say and the fact it is now sticky at the top of every forum raises big alarm bells for me but some of the comments from others saying they have not had similar problems etc suggest this is not necessarily an issue for everyone.
Some clarity would be great 🙂