Plastic Injection Molding

Well, if they're going to talk about - and briefly focus on - how Lego bricks are made (not Legos, ya savages), then I'm going to post the video.

Our material science class at Princeton High School doesn't get anywhere near practicing injection molding. One of our dreams out in the distance is to sometime get to lost wax casting, but that's about as close as we've considered. In this video, however, The Engineer Guy does a great job explaining the process of injection molding and a bit of the history of celluloid because one of the claimants for the invention of celluloid is the inventor of the injection molding process.

Plus there's the Lego connection...more of which after the break...






And here's the video that sent me down this rabbit hole...