You, our core audience, know more about injection molding than most. Some of you don't know anything about it at all. Whichever camp you're in, you should watch this video by Bill Hammack, a/k/a Engineer Guy, explaining the process because I guarantee you'll learn something new; not only does he provide clear explanations of the machines both inside and out, he reveals the history. (Which injection molding mavens among you knew it was pioneered in the 1800s—and was tangentially related to elephants and billiards?!?)
Current industrial design students: Did your current professors explain injection molding to you, and if so, using what methods? And if you don't mind sharing, what year are you, and what program do you attend?
Current industrial designers: Did you learn about injection molding on the job, or at school? If the former, who explained it to you and how?