This Process can be used for the home made DIY projects for hobbyist activity. A single mold tool almost 12-24 Hrs time to get cure while in the process of making the part, depends up on the grade of the resin you took for making the mold. There are some fact curing resin which can be cure rapidly and gives the grate result while casting the part. 

Process of implementing is very simple you just need the one contener and the 3D print which can be fit into that contener. then mix the resin as per the mention in the specification most resin has 1:1 ration depends up on the curing agent the ratio may change. then place the 3D printer part into the contener and pore the resin mixture on to it, make sure that no air should be trapped while poring the material on to the 3D printed part. Let it cure properly then remove the 3D printed part from the contener and remove the object as well. your silicon die is ready to use for casting. Put some powder before poring the mix of binder and the iron powder. The mixture of metal powder and the binder should be 1:1, but in some cast the ration may change due to the availability of the casting material.