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  • Pressure die cast 'pressure pot'

    Discussion in 'Metal casting & moulding' started by wizardofid, Sep 1, 2009.

    1. wizardofid

      wizardofid Active Member

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      I know cookware is routinely pressure die cast. But has anyone come across a pressure die cast pressure-cooker? Given that there will be flanges and undercuts to ensure sealing with the lid, will it be possible to manufacture pot and lid by the die-casting process? Most of the pressure-cookers I have come across are made by deep drawing for the pot and shallow drawing for the lid, with another operation to form the flange and the formed feature to help with locking.

      'pressure cookers' may also be called 'pressure pots' depending on which country you are in. Thanks in advance for the help with the responses.
       
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    3. mvalenti

      mvalenti Well-Known Member

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      The only light I could shed is forging. I have done high pressure equipment, 10-150ksi, all of the pressure vessels were manufactured by forging. Materials were certified, sharpy impact and such. Machining and then hydrotesting. I'm not familiar with pressure die casting tho. What is the typical grain structure in the finished part?
       
    4. stewlenox

      stewlenox Active Member

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      When I was a teenager I used to go to a lot of flea markets. At one of these I bought a cast aluminum pressure cooker which had flanges that faced in on the lid, and some that faced out on the pot. They were angled slightly, so that when the handles were aligned (each half had a handle) it tightened. It had some kind of latch to keep it from moving, once tightened.I believe it was made by the "Presto" company...but I'm not sure. It was a long time ago. The pot would have been easy to cast, but the lid would have to have been turned to get out of the mold. I hope this helps.
       

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