Engineerguy Bill Hammack gives an absolutely excellent walkthrough on how plastic injection molding works. He also gives a brief history of how that technology came to be, following a $10,000 prize in 1860s & ’70s dollars (now $3M) to invent what would become celluloid, which eventually aided the invention of plastic injection molding.
Bill’s walkthrough is one of the best explainer videos I’ve watched on this subject – from the animations to the terminology (check ring, parting line, hot runners, ejector pin witness marks, and more!) and techniques explained, simply and clearly. Watch it below!
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