this post was submitted on 22 Jul 2025
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Many people will say "just sand it down". But the extruder-printed plastic is still going to be porous as heck. A perfect place for germs.
Personally, I'd use the 3D model to create a negative mold of sorts, and then cast it out of something more human-friendly. But I haven't looked at the complexity of this model, this would have to be designed accordingly.
Your mold idea makes me wonder if cast aluminum could be practical for a shell for this.
How do you usually do that?
Do you create a negative of the model digitally or take a mold of the printed parts?
What kinds of human-friendly materials do you use? And do you need any special equipment for it?
The adult toys community would have some guides. You print the object, cast the mold around it and then fill the void with silicone afaik.
Is silicone rigid enough? Adult toys have slightly different requirements from many other 3D printed things.