Abstract: A mold assembly has an ejector assembly which includes a rotating camming device and a longitudinally sliding locking device. The ejector pins of the ejector assembly are replaced by rotating the camming device to slide the locking device into a disengaged position. The ejector pins are now free to be removed from the mold assembly. Once new ejector pins are inserted into the mold assembly the camming device is rotated back to its engaged position to lock the ejector pins into the mold assembly. The rotation of the camming device is in excess of 180.degree. which provides a locking feature in both the engaged and disengaged positions.