Above is our shredder project.  It’s still problematic.  I reinforced it, so that the coupling doesn’t spread when it stalls, and so that the pressure relief is set low enough that it doesn’t stall the electric motor when the shredder stalls.

What we still don’t have is enough torque.  But I’m wondering…if the clearance on the blades was ti…[Read more]

I have no experience with this, but have you tried shredding them?

edit: from what I found online, nylon’s melting point is either 218°C or 257°C not sure what the difference is though

Boa tarde Miguel, espero que esteja a gozar de boa saúde, deste lado fala o Sérgio, eu sou angolano e também ando procurar trabalhar com este projeto em Angola, Luanda, gostaria de manter contacto contigo e saber se poderíamos mergulhar juntos nesta mega ideia, neste momento estou a viver em Portugal. Assim que ler esta sms, espero que se int…[Read more]

Since the forum has been shutdown and there is little to no long-term visibility for ANY PP related content, we continue on http://plastic-hub.com/blog (currently WIP).

Hello,
I have never used a precious plastic machine (though I would like;)) but I think I have the answer to your question by watching the videos of precious plastic: “How to finish precious plastic object” or something similar.
To make large dense cubes they make a welded mold ( outer part and a “pusher” ) which they put in the compression…[Read more]

Machine with 4″ bore cylinder.

My current machine uses this 5″ bore cylinder:
https://www.baileyhydraulics.com/Chief-TC3-3000-PSI-Tie-Rod-Cylinders-5-x-16-2-Rod-Dia-

I’ve also built a machine using a 4″ bore cylinder:
https://www.baileyhydraulics.com/Maxim-TC-2500-PSI-Tie-Rod-Cylinders_64

I’ll upload an image of that machine.

The smaller cylinder should be adequate for most…[Read more]

We want to upgrade our injector to have pneumatics.  Do you have the details on the pneumatic cylinder you used? How large of a volume tank do you need on your compressor for that cylinder? Any lessons learned that you can share with us before we start? Thanks!

I have had the same discussion for years!!! But I think more and more people are making molds, so I hope the prices get down, so the complexity.  In Mexico we are looking for alternatives, for example we use the inyection machine to melt the plastic and the use a press https://www.youtube.com/watch?v=Z0LP8aTaj_0&t=92s

Saludos desde México