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Re: [casting] vacuum pump

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  • Rob de Bie
    Try this table to get an idea: http://www.nandor.com/conversiontable.stm In my experience, you need around 30 mbar (third column) to degass silicone rubber.
    Message 1 of 15 , Jan 9, 2010
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      Try this table to get an idea:

      http://www.nandor.com/conversiontable.stm

      In my experience, you need around 30 mbar (third column) to degass
      silicone rubber. For resins I like to down further, say between 2 and
      5 mbar, otherwise it can take a long time for the bubbles to break.

      Rob

      At 01:27 09-01-2010, you wrote:
      >Hi,
      >having had some great advice from Ted, I am now at the stage of
      >purchasing a vacuum pump for my desiccator.
      >Most of the posts I have read advise a pump that can pull at least
      >29 inches but here is my problem. all the pumps I have seen on ebay
      >talk of these Details:
      >
      >
      >
      >Pumping Speed (litre/min)
      >Ultimate Vacuum (micron)
      >Ultimate Vacuum (mbar)
      >
      >please help.
      >a very baffled Nigel in the UK
      >
      >
      >
      >------------------------------------
      >
      >Yahoo! Groups Links
      >
      >
      >
    • Nigel Ford
      signatureNice one Rob. I ve copied it for reference. Nigel [Non-text portions of this message have been removed]
      Message 2 of 15 , Jan 10, 2010
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        signatureNice one Rob. I've copied it for reference.






        Nigel





        [Non-text portions of this message have been removed]
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