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How to model perforation


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  • 3 weeks later...
Posted · How to model perforation

That is going to be a hard one. Even if you could model it, an FDM printer is not going to like it.


I have printed a flat plate sift, not curved like this, by playing with the infill-parameters: print only outer side walls, no bottom, no top layer, and then set the infill to maybe 70%. Then study the preview in Cura, and adjust as desired. This was achieved by playing with Cura-settings, not in CAD. But I don't know if there are any infill patterns suitable for this complex curved thing? My holes only had to go top-down, not sideways.


For modeling in CAD, I once created a simple flat pattern of holes, and extrapolated that over the model. But that was a *very simple* flat thing too. So I don't know if you could extrapolate and map a pattern of holes over a complex curve? But that is the basic idea:

- make a hole in a plate

- extrapolate that hole to fill the whole plate with holes

- then map that pattern over your model, like you would map a texture over a model


A very simple hole-pattern extrapolated over the bottom of this sift in CAD. Then edited as required.



A crude filter (designed as solid, without pores) printed without bottom layer: thus side walls were solid, but the bottom was only infill, so that bottom became porous due to the infill pattern. This was only for capturing chunks of dirt, not for fine dust, obviously.






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