In rapid prototyping, one aspect that is important, is mold design. Actual approaches to make a mold in a computational way, works well, but usually if the object is parametrized otherwise in some case does not have the desire precision. Beside this, using the actual approach, tends to be complex, because some steps are difficult to fix in case there are problems. The focus of our work is to create an alternative methodology that works with every type of object, that is at least equally fast, and precise, and avoid these steps. The result we got, were optimistic, and it could impact the area of rapid prototyping to make molds in an easier way. Finally, our future work, is to make our approach automatized.