Bill Hammack, aka The Engineer Guy, gives a brief history of the injection machine. Originally created by John Wesley Hyatt to make billiard balls out of celluloid (rather than ivory), the machine has further developed to create more intricate objects we use everyday even LEGOs.
Bill details the key engineering principles underlying plastic injection molding. He describes its history and, then, reveals the intricate details of the process. He shows viewers where to found, on any injection-molding product, the markings created by injection molding. He closes with a description of the one of the finest examples of the injection molding: the Lego brick.
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