Project 9: Casting/Molding. Mill
something out of wax using cad.py and the modela, make a mold out of
polyurethane, and make a plaster object.
I used Microsoft Paint to make an "F"-shaped shape with the word "art"
on it. Below is the file that I used.
I decided to use the 1/64" bit because of the small features of the
text. This made it take forEVER to render in cad.py and even longer to
mill.
For some reason the mill decided to poke a bunch of holes in the wax
before I got to it. Who knows what that was from. It was also
really difficult to clean out all the shavings.
I was only able to find small amounts of polyurethane, but used them
anyway and made my mold. I left it to set for about 16 hours and tried
to demold.
so sad, it did not work!! Look at the ugly blob:
I believe this happened for two reasons.
1. I did not use demolder.
2. Regardless of this, the polyurethane is super slimy gross. I
tried again and when I remixed the two components I was shocked to
realize that part B looked really different than my first attempt
(less translucent, different consistency).
I believe this is because it needs to be stirred and since I was using
the very bottom, the dregs, the backwash of part B, it didn't quite
work to crosslink the polyurethane.