With 3D printing, we end up with a lot of spools. As a STEM educator, I have for long wondered how to play with the 3D filament spools before recycling them. Yes, kids might make a big toy car. However, I wanted to build something more mathematically appealing.
Here is a dodecaheral joint or connector, with the right dihedral angle, that can be used to build a huge dodecahedron using 12 spools. Most spools have a flange with a raised edge. So I decided to take advantage of that to design a joint with a groove (8.4 mm wide) that can snap onto the spools and can slide around. The joint curves are designed with respect to a spool with a 100-mm radius.
As shown in in the pictures, it works well. With the empty spools on hand, I was able to make a half-dedecahedron.
STEAM educator, learning from and working with K-12 STEAM teachers to explore new ideas of teaching and engagement. I firmly believe ART is at the core of STEM learning or all human learning! I owe my ideas and designs to the hundreds of K-12 children and teachers and university professors I have had the pleasure of working with, in multiple disciplines-- math, science,engineering language arts, social studies, early childhood education and more! All mistakes, of course, are mine! There is no warranty or liability whatsoever implied or explicit behind the designs or ideas. They are all posted for their potential educational values.
When working with children, please strictly observe all safety and health procedures! Please refer to the NSTA safety guides: http://www.nsta.org/safety/.
LGBU Contact: LGBU@SIU.EDU