Hello to mold designers and makers,
I have been in this end of machining since the 1970's and have worked on molds from miniature for medical to large automotive die-cast and plastic injection molds. A fascinating career and a rare sub-skill of machining. I hope you get an opportunity to learn, apply and prosper. A clue, this was a family trade, really difficult to get a start in if not into mold making trade.