PET Bottles to Filament

Sven L.

PET Bottles to Filament
« on May 31st, 2015, 09:23 PM »
Hi everyone,

I am intending to develop my own version of a filament-producing machine. It won't use pellets, because those still have to be purchased and shipped. Why to spend money? My machine will convert directly plastic waste to filament. But advises are needed.

POWDERIZING PLASTIC BOTTLES

I am not intending to use shredders, I am thinking about a fast-rotating rasping blade. This is a round metal blade that has on its surface a lot of rasps and  - so my idea - also vertical knife blades. There are plenty small holes in order to allow the small, rasped plastic shreds to leave the rotating rasp disc and not to overheat and cloak. What do you think - could that work?

PRESS SCREW

I am playing with the thought, to mount the rotating press screw vertically and not horizontally. Are there any reasons against a vertical mounting?

And how long should the press screw be? Please advise me.

CUSTOM PARTS

Finally, I need to get URLs of locations, that can produce custom-built parts. Florida is closest to my own location. Thanks.

element 119

Re: PET Bottles to Filament
« Reply #1, on May 31st, 2015, 10:48 PM »
If have ever done any woodworking they make rotary drum sanders, some are oscillating that go up and down but instead of drum sandpaper they also make a drum rasps. They also have different diameter drum rasps.

You could save some money using these "rotary drum rasps".   http://www.grainger.com/product/EAZYPOWER-Rotary-Drum-Rasp-29UJ08?s_pp=false&picUrl=//static.grainger.com/rp/s/is/image/Grainger/29UJ08_AS01?$smthumb$


Maybe save some money over getting something custom made.

Hope this helps.

element119

Sven L.

Re: PET Bottles to Filament
« Reply #2, on June 1st, 2015, 12:46 AM »
Not bad, - good thinking! I found something similar, but cannot upload here the image. Google for "Roto Rasp". That is how I got my initial idea. But I need such a disk with a radius of 8 inch, in order to facilitate each type of PET plastic bottle, that is the problem. Any ideas?

Lynx


Sven L.

Re: PET Bottles to Filament
« Reply #4, on June 1st, 2015, 11:26 PM »
Hi, thanks for the interesting advise about the "own bench". Sounds logical, but I have to consider time and effort this will take. I think, what I need most, at this point of time, is some sort of sponsoring. I am looking at Kickstarter, and make thoughts to open my project there.

I still might open here my "own bench", still, for the sake of getting good advise and the expertise of persons like Russ and others. Give me just some time to think about it.

For now, I still have to figure out how best to powderize PET plastic bottles. :-)

Lynx

Re: PET Bottles to Filament
« Reply #5, on June 2nd, 2015, 12:41 AM »
Quote from Sven L. on June 1st, 2015, 11:26 PM
Hi, thanks for the interesting advise about the "own bench". Sounds logical, but I have to consider time and effort this will take.
Actually there's no difference between posting in your own bench as opposed to posting elsewhere in the forum, the only "downside" is that you get moderator privileges for your own bench, that way you can moderate (I.E delete, edit, move etc) posts to your own liking, provided of course that you don't break any forum rules along the way, which basically means as long as you stay out of inflicting personal insults to other members you're free to moderate the posts in your own bench any way you see fit.

Good luck :-)