Making Complex Parts Easy With a Collapsible Core

If you've ever dealt with mold undercuts, you know that a collapsible core is basically a lifesaver for speeding up production and keeping your sanity. It's one of those engineering solutions that feels a bit like a magic trick when you first see it in action. You have a solid-looking piece of metal that somehow shrinks down to let a finished plastic part slide right off, even when that part has complex internal threads or deep grooves that would normally get stuck. ...

April 27, 2026 · 7 min · Riera Idan