Forum Replies Created
@leflora I like your idea.
For Recycle Rebuild the shareholders of our PP business are community members, but in the sense, we try and spread the wealth. Our profits are split by the cause, depending on the community. Savings, Education, Product Development, Community Cleanups/Events. So sadly we don’t aim to provide shares in the larger sense.
However, what we aim to do is provide $1 = 1kg of trash donation/investment. Not quite the same, but can provide investors with peace of mind.
In the Version 2.1 it is 3mm and that is what I have on my shredder 😀
I completely agree with your suggestion about creating regional costs, but first I feel to get there the rate card needs to have a good broad spectrum of items that most PP workshops need to set up. Are there any items in my rate card example that are missing but in your experience is crucial for your set up?
Personally, I found the need for a Jigsaw to be something I never expected and a belt sander.
I just posted a rate card and budget calculator on a different thread for this kind of project to help you understand your budget. The link is here.
I would start by finding the items on the rate card and their costs. If you have any questions please reach out.
After talking to @siemenb on the phone a few weeks ago I have decided to release a rough draft of the Project Budget Calculator that is based off the excel my organisation uses to understand how much a project would cost.
Because its such a large topic on its own, I have decided to create another forum topic here.
Hope this helps someone.
This is fantastic work! I really appreciate the effort that has gone into this!
Will there be any more research done on the remaining types of plastics?
I was just in Nepal from September to December. An amazing country with real need for recycling.
I, unfortunately, have committed to a PP project in Dominica for the next few months. However, I did set up and budget a school build project in Nepal and understand some of the difficulties with working within such a country and as I said I am working in Dominica setting up a project. I have a full budget that we can modify on a call and shape to give you an idea of the costs behind your plan if you are interested?
Its a shame your project didn’t come up sooner! I’d have been there in person, but I will provide as much support as I can!
Not sure if you have found the excel person you are looking for or shown the community the manual but I wanted to express my interest to help. I am the founder of a recycling charity (so I understand excel/money) and am currently setting up a community-run project in Dominica.
I currently use a series of excels I developed in my previous job as a Project Manager for an international non-profit.
I like your mind, I have been thinking the same thing. However, in Dominica finding one of these is trick. I will continue to work on this (because my arms are getting sore) and post any updates I make, once I find one lying on the side of the street.
In other news, we took the hand-cranked shredder to the beach yesterday to recycle plastic collected during a beach clean up and it got a lot of attention!
I’ll get onto creating a new thread, I just wanted to make sure I contributed to the growth of your invention!
@timslab Thanks for inspiring us to build something similar.
My team at Recycle Rebuild took this design and made it with an increased number of recycled materials (minus the shredder and bearing) (maybe we call it V2.2?). We did this by swapping out the laser cut gears for used motorbike sprockets and chains, bringing the cost down significantly. Each set is a 1:2.5 ratio so we used two. To ensure the chains remain tensioned we have added little bolts to tension the chain. Almost everything is welded, however, a lot could be bolted.
Our weights on the end of the flywheel are also recycled from old truck leaf springs. We also compacted the design down to what we felt was the smallest we could make it using this approach.
A quick list of stats:
Flywheel Diameter: 97cm (38″)
Frame Length: 102cm (40″)
Depth: Bar width plus the size of the shredder. 26cm (10″)
The only challenge that we had mostly limited I suspect to our location (Dominica) is that the final sprocket that connected to our steel hex bar would always break. It is the connection with the most pressure. We tried a bolt lock, it stripped the bar, we tried a key it stripped the bar further. So we welded fully.
The machine is very powerful, and a strong person behind the handle can apply a lot of pressure. So far we can do most PET bottles, (but struggle a little on solid blob sections and have no problem with HDPE caps and other similar items.
It is my full-time job to help Dominica develop its socially run recycling industry and my passion to help the PP community. So any questions you have on the machine or any dimensions you need I am always available to help.
@davehakkens, Love the idea! I used to spend my summers on an ecovillage in Scotland learning about sustainable sewage treatment and sustainable architecture. I assume that has something to do with why I ended up becoming an architect!
I sadly don’t know of any land in Europe but if you need any help when it comes to sustainable architecture and building count me in!
I can’t wait to see how this turns out!
We haven’t tried blocks in Dominica and I doubt we will for a few reasons.
1. The product would take too long to make with PP machines to make the option financially viable or scalable for non-profits. Most charities build 60-100 houses a month.
2. The only PP machine that could potentially make the blocks is a compression oven. However, all ovens on the island are gas not electric.
We would rather approach this in terms of planks.
1. Planks can be made from the injection machine if designed cleverly enough.
2. Plank construction leaves a cavity space that can be infilled with biocrete or other material.
3. The production time is faster per m2 than a block.
4. The same configuration has the potential to be used to replace tongue and groove panelling on internal applications. Such as undersides of roofs.
This is why I like the original plank concept in that “Lego House” forum over bricks.
No problem, and good luck on your recycling!
Yes exactly, a blunt blade still cuts but requires more pressure and is more likely to deform. I personally haven’t had the chance to test myself. My shredder is hand powered and is currently being modified.
Would it be possible to create a 3d printed stamp, and then make a mould using the aluminium cast method? Would the aluminium be durable and detailed enough?
We created a medium-sized version of this on the cheap ($45) using old cooking griddles
To create the device we bought two cooking griddles (Amazon link to exact model). One is flipped and placed on top to create two independently heated plates that can be pressed.
The following modifications were made:
The bottom plate is unaltered other than cutting out the top left corner to prevent the top plates electronic housing coming into contact with the bottom heated plate when pressed fully.
The top plate also has this modification to prevent the same happening with the bottom electronics.
The top plate has had all the handles removed and been angle grinded smaller removing the rim of the plate so that it fits snuggly inside the rim of the bottom plate. We then drilled several holes around the outside of the plates, with bolts, nuts and washers that we could tighten with a spanner/wrench once heated to create the pressure.
Fundamentally that is the list of changes. It creates near perfect sheets from most plastic types but the temperature control is not very accurate and we would recommend modifying to use the PID controller and sensors. (Should be easy)
We would also recommend to build/weld a steel rig that can better apply pressure to the plates in the centre without compressing the heating ring as we tend to find the plates bow a little in the centre when placed under high levels of stress.
We are happy to answer any questions. For us, this was our first “PP machine”.
I too would like to know this.
Hey, Can anyone help continue this thread by providing some information on Plastic type + oven temperature + heat duration + cool duration?
This information is key and I have been searching these forms for a long time to no avail 🙁