One of the products of the plant where my Dad worked was blanks for aluminum tanks
(of all sorts). I think his retirement
plaque, made from one of them, is around here someplace. It's basically a big hockey puck
they put into a press and extrude the whole tank in one blow. I'm not exactly sure how the neck is formed.
They also used to ship big insulated crucibles of molten metal off to various casting plants within a hundred miles or so. I always gave those trucks a wide berth on the freeway. Most people probably had no idea what they were...
Ah... thnx for the vid. Pretty cool.