PET bottles to filament, pt1 - bottle cutter

okay today I'd like to show you my paultruder setup which is similar to other examples that I've seen online which are very impressive but I've added a couple of unique features myself that I'd be that I'd like for people to see and maybe be able to make use of so here we go um I'll share most of the files or all of the files for for the various parts that I've designed uh when I get around to it this is the bottle cutter and I've already cut a strip I'll cut the beginning of a strip out of the bottom of this bottle so let's start by feeding that in and then we put a weight on top this this weight is a bit too small it's full of rocks and metal nuts uh it's it's too small it needs to be about twice as big to hold enough um I'll put a couple of rolls of tape on top of it for now which I tested before and that makes it about right that's about 900 grams in total which is sort of the minimum you need for this particular Chi plastic bottle um but for other types you you want less than a kilo um so hopefully about 900 grams is about where you want it for most bottles uh but yeah hopefully it works with this one anyway we start pulling start pulling so there's nothing too out of the ordinary about this yet let's just check the thickness I haven't perfectly adjusted this yet as it's beginning to do a particular bottle of thickness will fluctuate a little bit before it sort of settles consistently we're looking for 6.5 millimeters for this exact type of bottle this Chi drink bottle um I've tested already any thicker than that won't fit any wider than that sorry won't fit through the pulltruder but we sort of want it as wide as we can having it fit through the pulltruder we're now at 6.2 millimeters you want 6.5 let's just see if it settles a little bit still at only 6.15 um so we'll adjust this screw here a bit it's an M5 screw and it's it's determining the width 6.43 it's pretty good 6.48 we're almost there 6.49 wow only 0.01 millimeters left to go six by four six oh no we've gone back down okay better just turn that a tiny bit more I can't remember exactly how many uh how many points of a millimeter you get per per turn exactly it's an M5 thread um but you've sort of got to do it experiment with it a little bit anyway okay so hopefully we're getting around 6.5 yeah 6.49 millimeters so this works fairly consistently of course you don't need to get it 100 consistent but the more different phases of the filament production protrusion that I can get as accurate as possible the more accurate the finished filaments will be okay so we're almost getting to the label which you'll notice I haven't removed that's because this bottle cutter has a special feature that I haven't seen elsewhere which is a slot for a chisel to remove the label now obviously you'll see this leaves some residue compared to other methods of washing off the label Gunk with acetone or anything like that but that's far too time consuming in my opinion I wouldn't bother to do this if I had to carefully wash and scrub at every bottle and also since the aim here is to save some plastic from the landfill if I was having to use acetone straight out of another plastic bottle and also more chemicals being released into the environment that would sort of defeat the purpose a little bit in my opinion of trying to do this on on a big-ish scale or at least to actually try and make some usable filament from this with the purpose being to that tiny satisfaction of stopping a little bit of plastic going to the landfill okay so almost at the label got the Chisel in place um now I should add this Chi plastic bottle um the label is actually only just attached with a little bit of glue so this this is way easier than some other bottle labels you'll you'll struggle a little bit um this thumb thumb screw is to adjust the thickness so I have the Chisel blade sits away from from there it's actually a bit of metal I've I've got down there a leftover piece of PCB stencil just to make sure the friction doesn't get on the pla plastic itself um that the bottle cutter is made of uh hopefully I think I've got this thickness around about right but as as you can see mostly the label is just coming off by itself because it's actually not much glue on this bottle at all but you'll see in some places there we go that's where the glue is and it's coming off reasonably well you got to be careful sometimes you cut into the plastic which I've sort of I don't know a bit of label has come through so it takes some experimenting to get everything just right that's better

Channel: 3d_olympics

Views: 15,985

Keywords: pultruder pultrusion recycle bottle cutter pet 3d filament

Id: pJCJTd4651Y

Length: 6min 58sec (418 seconds)

Published: Mon May 15 2023