Obviously.
Balance Base
A section through the mold, showing clearances to bottom and top of the hemisphere
Roughing out the positive mold from machinable wax
Make chips, not war!
The wax mold finished with a 6mm ball end mill
The wax mold with illuminated from the back, showing edge cuts
Kit for making the silicone mold
Casting the silicone mold into the wax positive
The cast concrete part with a shrinkage crack on the top surface
The cast part popped out of the mold with no problems
A preview of the base doing its thing
A view of the cast part upside-down
Files
Fusion 360 Archive (372kB) - cactus-base-mold_v3.f3d
TODOs
☑ Design a 3D mold
☑ Machine it
☑ Cast parts from it
Links
Fab Academy 2016 - Molding and Casting
View the design in the browser - View on Autodesk 360