In some cases you might want a 3D print with a very permeable structure. For example when using a 3D print as a mold for vacuforming, the permeability is used to transport the air out. Another example is when combining 3D printing materials with casting materials; in order to optimize the adhesion between the two materials, the casting materials permeates a bit into the 3D printed structure.
There are several ways in which to create such a structure. In this post I describe one which consists of a couple of simple Cura settings.
The idea is to print the whole object with infill only, so we set the Top/Bottom Thickness and the Wall Thickness to zero.
Then we set the Infill Pattern to Zig Zag and the Infill Density to 50%.
Now here’s the catch: we set the Infill Line Directions to [ 0,0,0,0,0,0,90,90,90,90,90,90 ]
We end up with a print which is rather porous and has little resistance to air flow.
I’ve printed one with TPU. Here’s the result.
I’ve been having trouble getting my chairs at home not to scratch my floor and after several failed attempts at solving the problem I have considered the solution which should have been obvious to me: 3D printing the anti-scratch thingies!
The final working design envelops the foot of the chair and plugs into the hole in the foot of the chair.