Printed Assembly.jpg
Project data
Authors Kyle Barie
Completed 2015
Made? Yes
Replicated? No
Cost USD $ 18.79
Export to Open Know How Manifest
Page data
Type Project
Keywords 3D printing, bottle stripper, cords, osat, plastic recycling, weaving, utility blades, plastic
SDGs Sustainable Development Goals SDG11 Sustainable cities and communities
SDG12 Responsible consumption and production
Authors Kyle Barie
Kathy Nativi
Published 2015
License CC BY-SA 3.0
Affiliations MTU
Michigan_Tech's_Open_Sustainability_Technology_Lab
MY4777
Language English (en)
Page views 1,255


In many countries, disposing of PET bottles has caused a major problem. Recycling these bottles proves a difficult challenge. This Bottle Stripper turns PET bottles into long strips that can be used to weave baskets, use as fishing line, use as a type of rope, or possibly even as 3D printer filament. This design spools the strips automatically as it operates.

Bill of Materials[edit | edit source]

  1. 1 - File:BottleStripper v2.stl
  2. 1 - File:Mounting Base v2.stl
  3. 1 - File:Razor Clamp v2.stl
  4. 2 - File:Spool Clamp v2.stl
  5. 1 - File:Spool Handle 1 v2.stl
  6. 1 - File:Spool Handle 2 v2.stl
  7. 1 - File:Spool Rod v2.stl
  8. 2 - File:Spool Stand v2.stl
  9. 6 - M3X10mm Bolts
  10. 8 - M3X16mm Bolts
  11. 14 - M3 Nuts
  12. 10-20 - M3 Washers
  13. Many - Standard Utility Blades

Tools needed[edit | edit source]

  • Athena Delta RepRap or equivalent 3D printer
  • PLA or ABS plastic filament
  • .STL Slicer program (Cura/Slic3r/etc.)
  • Appropriate driver for chosen bolts

Skills and knowledge needed[edit | edit source]

  • Proficient knowledge in 3D printer operation
  • Basic mechanical assembly skills

Technical Specifications and Assembly Instructions[edit | edit source]

  1. Download files listed above
  2. Print specified number of parts
  3. Clean parts as needed with a razor blade
  4. Assemble parts as shown in the Completed Assembly photo above.
    1. Use 10mm bolts to clamp razor blade and spool rod
    2. Use 16mm bolts to secure parts to base (add washers as needed if bolts stick too far past bottom of the base)

Common Problems and Solutions[edit | edit source]

  • Cutting slots may need trimming before use
  • Bottles tend to begin to cut into plastic stripper over time. May need to replace with metal substitute.

Cost savings[edit | edit source]

  • ~252grams plastic filament - ~$7.32USD @ $29USD/kg
  • $1.89 in hardware from McMaster.com
  • 50 pack of utility blades $9.58 on Amazon
  • Total cost ~$18.79
  • No commercial equivalent can be found (other self made solutions, but no detailed drawings found)
  • Savings is in time from self-spooling action

Additional Files[edit | edit source]

Below is are the .SCAD files used to create this device.

References[edit | edit source]

  1. Utility Knife Blade Inventor model. Converted into .STL for use in OpenSCAD: https://grabcad.com/library/standard-utility-knife-blade
  2. http://www.utsumi.com.br/pet/English/filetador/index.html
  3. http://web.archive.org/web/20160222000558/http://www.livedebris.org:80/Photos/Art%20photos/Tutorials/bottle%20cutter%20tutorial.pdf
  4. https://www.appropedia.org/PET_Bottle_Shredder