This past week I was ask by a company who does some mold design and also a lot of part cradles, what functionality inside of Inventor would allow me to do this. Well the answer is using derived components. My example is very simple consisting of a upper and lower portion of a mold and an item I would like to create a mold from. Of course this is just a couple simple blocks that don't have all the detail as a proper mold would like dowel holes etc...