Comment Comment by petertodd Aluminum is used for injection molds:https://www.protolabs.com/resources/blog/injection-molding-a...https://www.moldmakingtechnology.com/articles/lets-be-clear-...tl;dr: the molds aren't as durable, and can't do certain things as well as steel molds can. But for small volumes and simpler designs that doesn't matter, so they are quite commonly used. parent petertodd 5 years ago
https://www.protolabs.com/resources/blog/injection-molding-a...
https://www.moldmakingtechnology.com/articles/lets-be-clear-...
tl;dr: the molds aren't as durable, and can't do certain things as well as steel molds can. But for small volumes and simpler designs that doesn't matter, so they are quite commonly used.