CNC Mills
Description
"CNC Mills can use spinning blades to carve 3D forms out of blocks of material, including: wax (pictured), plastics, metals, woods, foams, etc. These can range from million dollar machines used to mill propellers for airplanes to the more accessible Craftsman CompuCarve which is available to the serious hobbyist for $2000. The output of CNC mills can be used as a finished product or an intermediary step. The image below is a wax ring that is ultimately turned to gold using an investment casting process." (http://replicatorinc.com/blog/2009/04/real-life-replicators-desktop-manufacturing-today/)