How to fix draft angles?

[jeremiasbazan99 (Jeremiasbazan)]

Hey! So I’ve been trying to create a 3d printable mold to cast concrete (it’s a labubu, don’t ask) but the model I’ve imported is full of little imperfections that will make casting likely impossible. Is there a quick way of fixing these? I’ve tried creating a tapered curve from the edges (pic 3) but I can’t seem to figure out how to blend it gracefully into the main model.
Anyway, thanks in advance

[jessesn (Jessesn Chen)]

@jeremiasbazan99

Hey! So I’ve been trying to create a 3d printable mold to cast concrete (it’s a labubu, don’t ask) but the model I’ve imported is full of little imperfections that will make casting likely impossible. Is there a quick way of fixing these? I’ve tried creating a tapered curve from the edges (pic 3) but I can’t seem to figure out how to blend it gracefully into the main model.
Anyway, thanks in advance

Privide a simple NURBS model workflow for your reference:

1. Use the DraftAngleAnalysis to creat the Max Draft Curve
2. Extrude a surface or polysurface with a draft angle based on the Max Draft Curve
3. Use BooleanDifference to remove areas with undercuts.

This is a basic workflow. If the model is complex, especiall when the parting surface is not a simple plane, this process will require more patience and additional steps.

[ftzuk]

Also if you’re printing a master and using that to cast silicone molds then you can get away with some undercut.

[jeremiasbazan99 (Jeremiasbazan)]

Oh that’s perfect! I missed the draft curve option.
Thank you very much!!.

update: ok I tried it but the draft curves self-intersect and create weird shapes which cause the booleansplit / booleandifference to fail. Will keep trying.

[jessesn (Jessesn Chen)]

@jeremiasbazan99

update: ok I tried it but the draft curves self-intersect and create weird shapes which cause the booleansplit / booleandifference to fail. Will keep trying.

Could you share your 3dm file?