A method of forming metal spheres includes ejecting a precisely measured droplet of molten metal from a molten metal mass, buffering the molten metal droplet to reduce the internal kinetic energy of the droplet without solidifying the droplet and cooling the buffered droplet until the droplet solidifies...http://www.google.de/patents/US7097687?utm_source=gb-gplus-sharePatent US7097687 - Process for fabricating metal spheres
