Motion Study Problems

I would like to do a motion study and/or animation of an injection mould. The mould will have 3 movements. 1st movement is linear which opens the mould. 2nd motion is rotary for unscrewing the thread cores and the last movement is a further linear opening movement which ejects the part. I have managed to animate the first 2 movements but cannot get the last movement going. Need advise please!SolidworksGeneral