Hello, I am a high school student looking for some info on different mold base components. My first one is the ejector sleeve. If anyone has a quick definition and some uses that would be great. As always thanks in advance.

Brock,
This may be a little hard to visualize but we'll give it a try. A ejector sleeve is a ejector pin with a hole in the middle which allows another pin to fit inside(a pin within a pin) the ejector sleeve lets say is .250 dia and the hole in the middle is(off the top of my head).156 dia. the sleeve is held in the ejector pin retainer plate the same way a regular ejector pin would be. there needs to be a hole thru your pin back-up plate, right underneath the sleeve, which will allow a longer core pin thats (.156 dia) located in your back clamp plate of the ejector box and held in place with a small retainer plate or by some other means. so what you have is a .156 dia pin that is stationary and when the ejection is cycled the sleeve will travel over the core pin, pushing the part off the stationary core pin. sleeves are used often to make the holes that screws will thread into holding various components in place in automobiles. If you have ever installed car audio components in your car you will see alot of these behind your dashboard. If this doesnt help let me know and I'll try and send you some pictures