plate stuck in antique crystal bowl

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  • LCHIEN
    Super Moderator
    • Dec 2002
    • 22011
    • Katy, TX, USA.
    • BT3000 vintage 1999

    #16
    did you get it out yet?

    Can you determine if its wedged in or if its sucked in by a vacuum?

    It mould be vacuumed in by differential pressure if say both were hot when being washed then put together and the cooling air contracted/ and the moisture made the seal.

    Wedging would have ocurred with a tight near interference fit.

    This is important to determine whether you need heat or cold to open them up.

    actually both would require heating the outer bowl, wedging might make it desireable to cool the inner plate if possible, or heating if vacuumed. Expand the trapped air and make the outer bowl larger would be the object.

    A shopvac would provide a firm "grip" on the plate when you can't get a hold of the edges. Using a funnel would increase the suction area, the holding power is proportional to the area of the seal attached to the back of the plate. But Even a 2.5" hose end should provide 30 pounds of lifting force with a 7 PSI (half an atmosphere) vacuum from a shop vac, and probably more as I recall a OK shopvac provides a good part of an atmosphere.

    warm the bowl with a hair dryer and lift the plate with a vacuum hose at the same time.
    Last edited by LCHIEN; 12-27-2009, 10:27 AM.
    Loring in Katy, TX USA
    If your only tool is a hammer, you tend to treat all problems as if they were nails.
    BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questions

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    • Alex Franke
      Veteran Member
      • Feb 2007
      • 2641
      • Chapel Hill, NC
      • Ryobi BT3100

      #17
      Thanks everyone! Great success!

      Oil didn't seem to help, but a suction cup worked like a charm. Both the plate and the bowl are still in tact. We didn't get a chance to try out any of the fancier methods -- we wanted to try those that we thought were the least risky first.
      online at http://www.theFrankes.com
      while ( !( succeed = try() ) ) ;
      "Life is short, Art long, Occasion sudden and dangerous, Experience deceitful, and Judgment difficult." -Hippocrates

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      • Richard in Smithville
        Veteran Member
        • Oct 2006
        • 3014
        • On the TARDIS
        • BT 3100

        #18
        Uh...can you put it back next holiday and try the hot water trick?


        Glad to here you cleared it up without any distruction. And never, never stack the dishes up like that again!
        From the "deep south" part of Canada

        Richard in Smithville

        http://richardspensandthings.blogspot.com/

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        • phi1l
          Senior Member
          • Oct 2009
          • 681
          • Madison, WI

          #19
          Hoooorrrraaayyyyy!!!!

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