Considering these rules and also having very valuable tips and comments from my classmate Ashot Margaryan, who is a molding and casting specialist, I started to design two sided keychain in Fusion360.
I cut the extra parts using electrical cutter
I did casting with plastic in urethane mold as well for the comparison. On my first attempt I forgot to apply the release agent, so I destroyed the mold during the opening. I had to make the second mold and this time I was careful and applied the release agent.
The cast was very nice and smooth. If I would decide which mold to use to cast the plastic, I would choose the urethane, because it is more sticky and you can connect to parts together easily. Secondly, it has transparency, you can see the level of the cast and pour exactly needed amount, without having extra parts.
February 3, 2022