I guess most hobbyists have a theoretical knowledge of how miniatures are made: someone sculpts a master or "green", from which a mould is then made, and miniatures are cast from metal, resin or plastic using the mould (sometimes spun in a centrifuge, or pressurised to get rid of bubbles). But until just now I'd never seen what a miniatures production line looks like.

Here are some pictures from Purple Pawn's visit to Iron Wind Metals, manufacturers of BattleTech miniatures (among others):

Inside Iron Wind Metals

More pics here (scroll down to about 1/4 from the top of the page).