Geekery: The Magic of Injection Molding

How do these plastic pellets become parts for our favorite games and hobby?

Ok, so it’s not really magic.

Plastic injection molding is used to create millions of different products. In this video Bill Hammack –  a chemical engineering professor at the University of Illinois – details the key engineering principles underlying plastic injection molding, and the technology’s history.

Bill runs a science centered YouTube channel – take the time to check it out. To learn more about how billiards went from using ivory to using plastic check out this fascinating article.


Did you learn anything new?

  • I_am_Alpharius

    Eerie sense of deja-vu…..

    • Author is very sick right now – had to pull from the archives for today’s column.

      • I_am_Alpharius

        Ah. Fair play. Hope they get better.

      • euansmith

        All the best to you all.

  • Stonewall

    Are those not perler beads in the first picture…

  • Mike Ptacnik

    maybe people will finally start saying NOR (new on runner) not NOS… WHICH IS WRONG!!! 🙂

  • dave long island

    I don’t care what the guy says, it is magic. And they’re all sorcerers, capable of conjuring up plastic bits. I say we nuke them all for morbid. It’s the only way to be sure… lol

    • Hagwert

      Hudson….. ” Frickin A “

    • benvoliothefirst

      “for morbid,” can’t tell if you’re making a joke or just don’t know the line is “from Orbit.”

      This was a really great video! The sprues vs. runners thing blew my mind. I’ve been so wrong for so long!

      • dave long island

        Oh okay. I always heard it as ‘for morbid’. I kind of like it better that way, too… LOL. But thanks for correcting me on that, though!