A 12 leaf (double layer) Iris box design. This box is essentially the same design as my 8 leaf iris box 'Octo-box', but with 12 instead of 8 leaves. The overall dimensions of the box are the same as the Octo-box, but this opens to a larger aperture. The mechanism parts utilise ridged pins and holes that clip together. The box is 80mm overall in diameter and the container opening is about 62mm in diameter. The box is opened by pushing the handle sections in an anti-clockwise direction.

No supports are required for this object.

This design was originally published on MyMiniFactory in late 2017 and has now been moved here as well. I have since designed many other iris boxes which you can find on my design page: https://www.thingiverse.com/BrienAllison/designs including an improved version of this design: Dodeca-box V2 https://www.thingiverse.com/thing:3665643. I also have other designs which you can find on my MyMiniFactory page: https://www.myminifactory.com/users/Brien%20Allison

The hinges of the mechanism use ridged pins and holes that clip together. The ridges alternate with 0.1mm layer heights, for this reason the parts must be printed with 0.1mm layer heights at the hinge and pin sections. Using adjustable layer heights in your slicer will allow you to print the majority of the parts at a thicker layer height for speed.

The effectiveness however of these hinges may depend on your specific printer and print settings, they shouldn't be either too tight or too loose. You could use contour xy compensation (ideamaker is a free slicer which does this) or alter your flow rate to adjust the fit for the hinges. The tolerance on the hinges is 0.15mm.

'top door 1' is a plain iris leaf for the top of the box while 'top door 2' is an iris leaf with a curved extension for opening the box. I recommend you print at least two of 'top door 2' (maximum of 6 as in the printed examples and assembly diagram) and arrange them on opposite sides of the box to allow ease of opening.