Quote Originally Posted by Tom View Post
Lost PLA casting, some have experimented with using solder to print circuits and simple objects. The solder flows too freely when melted which makes it hard to print, combine that with the fact that the solder dissolves the brass nozzle not many have printed in metal or even tried.
There are also those major problems. Metal flows too freely when melted. Also, there is the problem with oxidation, thermal expansion, etc...

The only feasible "metal 3d printing" seems to be SLS (Selective Laser Sintering), but unfortunately there are a bunch of patents restricting that process...

Eric