Really cool demonstration from Scott on injection molding, he fabricated a small hand driven injection molder using the book: Secrets of Building a Plastic Injection Molding Machine as a guide. The end result is a functional machine capable of injecting plastic into a variety of parts, all fabricated from basic tools and a small lathe.
Unfortunately the shear pins let loose while applying a little too much pressure to inject plastic, but he of course brought along some “production” parts that show incredible potential for so little cost.
Two shots with the injection molder or with two colors of plastic yields different color hubs/color swirls
Thanks for the pictures Scott!