Introduction: Crayon Pen

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As a student, it is obviously very important to have pens that write well, but you also want to have a pen that stands out from the rest. So, if you really want to make a statement you need something a little extra. After seeing this Instructables crayon challenge, I recognized a perfect opportunity to create an out-of-the-ordinary pen.

This Instructable will walk you through creating your very own crayon pen!

Supplies

For this project you will need the following supplies:

  1. 3D printer (this is a small print so any printer should work)
  2. 3D printer filament (I used black for my trials and green PLA for the final version).
  3. Markers (for coloring the pen at the end)
  4. Tinkercad link below
  5. Optional: Tinkercad if you want to adjust the design at all.

Step 1: 3D Design

There are two main parts to this design: the barrel and the click piece.

Using Tinkercad, I modeled a click piece which would click into the holes of the barrel. The idea is that when you click down, the point slides into the bottom hole. To move it back up, simply press on the point and the spring will push it back up

Depending on which type of ink you want to use, you may have to adjust the radius of the hole on the pen's tip.

Here is the STL file for the design:

Attachments

Step 2: First Trials

As with most 3D printing, it may take a couple of tries until you get the correct print.

My main area of focus were:

  1. Getting the click piece be just the right size in comparison to the barrel (not too tight, not too loose)
  2. Making sure the opening at the tip of the barrel is the right diameter
  3. Making sure the point that extrudes from the click piece is flexible enough to be functional
  4. Making the design look like a crayon

Warning: Depending on your printer, you may need to make adjustments or sand down pieces.

Step 3: Gathering Parts

To get all the parts, you need to disassemble another pen, and cut down the ink cartridge to fit inside this crayon. Once you have everything, just assemble this pen as you would any other pen.

I based my model on the ink cartridge of a Pilot G2 pen, so those are the parts I put in this pen. If you want to use the ink cartridge of a different type of pen, you will have to adjust the insides of this design.

Step 4: Final Product

The crayon pen is complete!