Drilling-NC-EDM-WEDM-die-saving polishing-assembly-die test. This is the general process. Time depends on the size of the mold and the complexity of the product. The bigger the mold, the more complicated it is. Need to use drilling machine, milling machine, lathe, boring machine, grinder, machining center (cnc), EDM, wire cutting machine and so on. Choose reliable machine tools and people to make molds.