This hand fan has a mechanical look with a simple opening and closing mechanism. I added a standard blade in the files if you want to create your fan design.
Parts
This hand fan design consists of only four parts and prints without any support.
The base blade has an attached cylinder to stack the other blades on top of each other. A bolt holds everything together by screwing into the top of the cylinder with inner threads.
The blade has two orientations, a stopper on one side and an inset on the other. This mechanism limits the blade rotation. In total, there are 11 of these blades needed for the fan.
The top blade is very similar to the other, but the inset is removed to create a flat top surface. So it is entirely optional.
Files
I made the fan in Blender. If you want to alter the design, I included the blend file in the attached files. The model has an animation of the opening and closing of the fan, scrubbing the timeline to preview the rotation of the blades.
I also included an empty fan blade model, which you can use to make a custom design.
I used the standard '0.2mm Quality' for my printer settings and tweaked the infill and the top/bottom solid layers amount.
Infill
Having a lightweight and sturdy fan is critical for displacing air. Therefore, I used a low % infill ratio of 10% with the honeycomb fill pattern (for aesthetic reasons).
Horizontal Shells
To see the infill on the transparent PETG blades, I decreased the top and bottom solid layers to 2.
I: Novice printing knowledge
II: Intermediate understanding
III: Experienced
Materials
I used two different PETG filaments for the 11 fan blades in the photos. (Prusament PETG Clear, Prusament PETG Prusa Galaxy Black)
The author marked this model as their own original creation.