DIY Cheapest Plastic Bottle Extruder, Recycle HDPE Milk Jugs Into Filament




Introduction: DIY Cheapest Plastic Bottle Extruder, Recycle HDPE Milk Jugs Into Filament

we're gonna see how to recycle milk jugs and soda caps into filament
by melting them with the heat of a cheap soldering iron

you need:

  • one empty CO2 cartidge
  • one soldering iron
  • insulating material (ex rockwool)
  • one piston that fits inside the CO2 cartidge
  • a vice or some clamps

Step 1: Manual Bottle Extruder With a Solder Iron

i wanted to know if i could recycle HDPE (milk bottle) at home so i made a ghetto hot end with a solder iron, clamped a CO2 cartidge on it it finaly melt and i got 5 mm of rough and strong filament by pressing with a piston tool i need a mechanical process to get a regular filament i can make pellets again with it for the moment :) i'll also need more heat to make the hdpe more fluid and make the extrusion smoother and maybe some insulation on the hot end.

Step 2: ​DIY HDPE EXTRUDER (from the Ghetto)

recycle your milk jugs and many more things into 3D printable filament

i've hacked a solder iron to make my heating source,60W !!! way more powerfull than my first attempt my auger is made of a 15 mm wood drill bit, my electric drill and a vice i made about 3 meters of filament with 1.5 grinded bottles and many losses the non regular diameter goes from 2 to 4 mm.

Step 3: Step 3 : Rewind the Heating Filament and Add Motor

i rewound the filament directly on the metal tube to increase the heating
it works , a bit too much i'll have to moderate it
i also added a support structure made of wood and a drill motor to run the drill bit anticlockwise

bottle extruder

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    1 year ago on Step 3



    6 years ago

    Impressive. I'm sure you could mold it into virtually any shape you'd want or need. Bravo!


    7 years ago on Introduction

    This is really great!

    As for your temperature problem, you should be able to find a variable temperature soldering iron. Then you could experiment with different temperatures until you find the ideal setting.

    Have you tried using any of this filament in your 3D printer or are you not yet at that stage?


    8 years ago on Introduction

    That's a really good way to reuse plastic! Would you get better heat transfer if you used some heatsink goop (that white cream) or solder between the iron and cartridge?


    8 years ago on Introduction

    Our local garbage collection company has donated to our city park benches where the traditional wood parts are made with lumber from recycled plastic jugs. They could probably take a direct nuclear attack and remain standing. I always thought it would be great to use this stuff diy. Thanks for a great start!