I was asked to add texture to an injection mold. I've never done this before, but heard that you can use sand blasting. I first tried an air eraser, which didn't work well. Then a full-sized sand blasting cabinet, which did work.
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00:00 Open
01:08 Intro, CAD, and CAM
03:48 Milling the mold
05:51 Masking the mold
08:27 Sandblasting
09:02 Removing the tape
10:52 Re-machining the bosses
11:29 Injection Molding
17:34 Wrapup