Forum Replies Created
Each PID should have it’s own thermocouple and its own heating element(s). Wiring the same thermocouple to multiple PIDs defies the purpose of having multiple PIDs for fine tuning the temps.
If one of your PIDs is working fine, I assume you wired something incorrectly in the other 3. I can’t tell what could be wrong without pictures, but I suggest making sure that you wired the SSR relay with the right polarity. If you invert the SSR polarity, it won’t turn on.
Have you tried melting the plastic in an oven? The only thing to keep in mind is that you need to keep the temperature withing the melting point of the plastic to avoid burning it. It’s pretty much the same principle of the Compression machine.
@craigt63 I haven’t tried myself so I can’t tell for sure if it would work. I googled “Plastic pallets” and found that there are indeed pallets made out of plastic, but the design is a little different from wood pallets, they are made with a more complex structure to support weight.
I guess you will need to try and test 🙂
Welcome to Precious Plastic @craigt63
Making shipping pallets out of plastic is not very practical, at least not if you are shipping heavy objects. First, the plastic planks will bend if something heavy is put on them, so you would need to extrude some pretty thick planks to avoid this. Second, heat will deform the pallets over time. And third, it would require a lot of plastic. If you managed to make plastic planks, it would be better to use them for making furniture or dog houses, rather than pallets.
Just my 2 cents.
You can cut long strips of cable insulation and use it to weave baskets or coasters
From old machines you can salvage belts, electrical wiring, switches. You can use an old washing machine to wash your plastic.
I suggests looking for all agricultural motors or searching for scrapyards, you might be lucky and find a good worm gear reducer and/or a strong motor.
If you find anything that you consider might be valuable/useful, post it here and we will let give you ideas of how you might use it.
Hola @mamani y @hora1966
Hasta donde sé no hay nadie fabricando las máquinas en Argentina de forma oficial, aunque en Chile si hay un fabricante, tal vez les sirva: https://bazar.preciousplastic.com/en/nicolasu
Copio aquí a algunos otros Argentinos que están interesados en el proyecto:
There are a couple things you can do to easily remove your plastic parts from the moulds:
#1: Make sure that the internal walls of your mould are as smooth as possible. If your mould has any type of texture, the molten plastic will adhere to them.
#2: Use a mould release agent: You can buy mould release in spray cans, or make your own with cooking oil. Here are some examples:
I recommend you to have a look at the bazar, there are several machine builders around UK and spread across Europe, I’m sure one of them can hook you up with a machine.
It depends on how small you want your shredder plastic, I wouldn’t chose anything less than 6mm diameter to avoid clogging
Welcome to Precious Plastic @sandeepy
Your motor is not going to work. Good/strong washing machine motors are usually close to 0.5hp, and you need at least 5 times more power to shred plastic.
You could try reducing the gear to gain more torque, but you would end up with a shredder spinning at 10RPM.
Chewing “gum base” is made out of natural incredients, but many brands of chewing gum also have synthetic ingredients added into the formula https://en.wikipedia.org/wiki/Chewing_gum#Gum_base
@jeana Don’t trust in the blueprint measurements. I have found that they were probably created and never updated, while the CAD files received multiple updates over the time (For instance, the blueprints will tell that you need 15 knives but only 14 are used in the shredder).
About the Imperial conversion, its not as easy as just using a converter. Metric steel and Imperial steel are different. For instance, you can find 3mm metric steel, but you will never find a 3mm imperial equivalent, the closest is 1/8″ which is 3.175mm. That difference in thickness means that the shredder files (walls, screw holes) had to be resized, not just converted to imperial.
All size proportions for the shredder Knives were left untouched in the new Imperial design, the only thing I changed is the thickness of the files, but of course you cannot see that on a 2D file 🙂
Just Fyi, the Knives and spacers used here are not the original PP files, I’m using the files redesigned by @keesdeligt where the hex holes are “1 instead of 27mm. You can see his topic at http://onearmy.world/community/forums/topic/shredder-modifications/
A winch sounds great, slow as fuck but powerful. I was also thinking about experimenting with a roller shutter door motor, you can find them on aliexpress for less than $150 and these things can lift 600kg. This one for instance has an output torque of over 400n.m which is plenty for the Shredder
No need to add more fuel to the argument buddy. The design is yours, you don’t have to share it with anyone, period. If anyone wants to force you to share your designs, just tell them to F*** themselves.
If anyone wants to take the original PP shredder design, build a shredder, paint it Pink and sell it as a “Premium Shredder” for $20.000, go for it.
If anyone wants to modify the original PP designs and keep the modified designs for themselves, who cares.
If anyone wants to make a clothes pin mould and they don’t want to share the designs because they are looking to make profit out of it, and then someone reverse-engineer the mould and shares it with everyone? Sorry, you should have waited for the patent to be fully approved before showing everyone your product, now deal with with
The point is, people should stop complicating themselves about this open source crap. Precious Plastic was given to the world for free and people can do whatever they want with it. The only thing you should not do is selling the original PP designs, but someone has to be really dumb to buy something that is available for free.
By the way, don’t worry about Dave, he’s well fed and can afford his weekly dose of chocolate. Royalties, tips, and any other fees given to the project are optional, no one HAS to give money to PP if they don’t want to, because the project was never intended to be a money-making thing.