2007-03-14 06:09:36 · 3 answers · asked by kris 1 in Science & Mathematics ➔ Engineering
Sheets of metal and big presses. Saw them make pots this way in schindler's list last night, must be the same.
2007-03-14 06:12:54 · answer #1 · answered by Anonymous · 0⤊ 0⤋
I've owned two different pressure cookers. The oldest was made of cast aluminum (both pot and lid) and had been turned on a lathe to improve its finish. The newest has a stainless steel body, with a copper-clad bottom that was stamped into shape. It has a Pyrex lid. Both pressure cookers featured a weighted valve to regulate the maximum internal pressure. Both also are equipped with a safety valve that will blow out if the pressure regulator were to become plugged with a bit of food.
2007-03-14 13:35:31 · answer #2 · answered by Diogenes 7 · 1⤊ 0⤋
The only ones I've seen and used are cast aluminum. Standard casting techniques for aluminum can be Googled easily enough. I can even remember junior high school metal shop, where we cast several different aluminum objects. We even finished some things on a metal lathe to get a finer finish.
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2007-03-14 13:56:27 · answer #3 · answered by tlbs101 7 · 0⤊ 0⤋