The file '3 Squares Geometric Model. A Straw Craft Project With 3D Printed Connectors. 3D Printer Model' is (stl) file type, size is 36.4KB.
3 Squares Geometric Model. A straw craft project with 3D printed connectors.
This model is a 3D Brunnian link, none of the squares intersect each other. This is similar to the Borromean Rings.
Files –
S-10mm 1x
S4-10mm 4x
The diameters are 10mm and can be scale to any diameter. Eg – if a diameter of 11.6mm is required, just scale the part to 116%.
The large straws in this model have a nominal diameter of 12mm. For this pack of straws which I obtain the internal diameter vary between 11.3 to 11.8 mm for different colors.
The length of the straw for the side is 92mm and can be adjusted for a tighter or looser fit. Hence the ratio of the inner diameter to length is 11.5 : 92 or about 1 : 8
Straws come in many sizes and variations of the diameter. We will need some trial and error to get a good fit.
Link to 3D CAD viewer for the complete assembly -
https://grabcad.com/library/3-squares-geometric-sculpture-1
This is printed in PLA with support.
Full disclosure: Straw connectors and geometric models are not my own original idea. The concept exists (or has existed) commercially, and there are many people tinkering with this on Thingiverse.
S-10mm.stl | 30.7KB | |
S4-10mm.stl | 122.7KB |