Plastic Injection Molding Explained, and how Billiards and Elephant Ivory Lead to its Invention!
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!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
