Old School Bookmark Mould

- Plastic,Craft,Prototyping,Product Design,Opensource

- Plastic,Craft,Prototyping,Product Design,Opensource
INJECTION
PP
PRODUCT

How to Make a Bookmark

Create a bookmark or marker using repurposed plastic. Avoid the need for new materials by utilizing existing resources.

Browse Files

Table of Contents

  1. 1

    CNC your mould

    Mould-Making Instructions

    Download the files provided and either CNC-mill them or send them to a mould maker.

    Use an aluminum plate with a thickness of 0.39 inches (10 mm). Each side of the finished mould should measure 3.94 x 5.91 inches (10 x 15 cm).

    alu drawing rendered-185fc94100a.jpg - Plastic,Craft,Prototyping,Product Design,Opensource

    alu drawing rendered-185fc94100a.jpg - Plastic,Craft,Prototyping,Product Design,Opensource
  2. 2

    Alternative: Buy The mould

    We offer this mold for purchase if you are unable to produce it yourself.

    Screenshot_20230129_041837-185fca9563c.png - Plastic,Craft,Prototyping,Product Design,Opensource

    Screenshot_20230129_041837-185fca9563c.png - Plastic,Craft,Prototyping,Product Design,Opensource
  3. 3

    Time to inject

    Your mold should appear as shown when ready.

    Given the thin object, preheat the mold to approximately 176°F (80°C) to facilitate easier injection.

    Untitled-2.png - Plastic,Craft,Prototyping,Product Design,Opensource
    Untitled-2.png - Plastic,Craft,Prototyping,Product Design,Opensource

    Untitled-2.png - Plastic,Craft,Prototyping,Product Design,Opensource
    Untitled-2.png - Plastic,Craft,Prototyping,Product Design,Opensource
  4. 4

    Inject the parts

    Time to inject. The plastic should be evenly melted to spread smoothly into the mold (mould). It may flow out of the nozzle due to gravity, so use a valve to control the release, opening it just before injecting. Act quickly and maintain pressure for a few seconds to prevent sink marks as the plastic cools under pressure.

    After injection, open the mold (mould) promptly. Delays can make it more difficult to release the object due to plastic shrinkage.

    6849E8FE-FF60-4669-9A09-A0186CA91FC9-185fcacb193.jpeg - Plastic,Craft,Prototyping,Product Design,Opensource
    62b05182de7b58ef75ad8d8ea3aa9bd0-185fcacbf90.jpg - Plastic,Craft,Prototyping,Product Design,Opensource
    0e5c791751ef05a1968036b3db99f14d-185fcacce6d.jpg - Plastic,Craft,Prototyping,Product Design,Opensource

    6849E8FE-FF60-4669-9A09-A0186CA91FC9-185fcacb193.jpeg - Plastic,Craft,Prototyping,Product Design,Opensource
    62b05182de7b58ef75ad8d8ea3aa9bd0-185fcacbf90.jpg - Plastic,Craft,Prototyping,Product Design,Opensource
    0e5c791751ef05a1968036b3db99f14d-185fcacce6d.jpg - Plastic,Craft,Prototyping,Product Design,Opensource

Software

  • Mould design files [insert-link]

Hardware

  • CNC milling machine [insert-link]
  • Aluminium plate (10mm thickness) [insert-link]
  • Pre-made mould (optional purchase) [insert-link]
  • Plastic injection machine with valve [insert-link]
  • Heating device (for preheating to 80°C) [insert-link]

Tools

  • Temperature gauge/thermometer [insert-link]
  • Pressure clamp or press [insert-link]
  • Safety gloves (heat-resistant) [insert-link]
  • Timer (for cooling/pressure phases) [insert-link]
  • Valve-controlled nozzle attachment [insert-link]

Articles

Books

Papers

YouTube

Opensource Designs