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Vibrating Casting Table

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  • #31
    Never thought of using the washing machine. Trouble is the wife never washes when I need a vibrating table.

    Bernd
    New York, Vermont & Northern Rwy. - Route of the Black Diamonds

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    • mwbpequod
      mwbpequod commented
      Editing a comment
      Use the drier -- don't need laundry in it!

  • #32
    Originally posted by DaveInTheHat View Post
    I use a plaster called Strong Cast and add a 1 drop of Finish Jet Dry. I use cold water. Seems to have solved the bubble problem for me.
    Still playing around with different solution. Haven't done any casting lately. I'll have to try your solution next time.

    Bernd
    New York, Vermont & Northern Rwy. - Route of the Black Diamonds

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    • #33
      When I used to work in the dental lab field we had a vibrating table which was basically a table mounted to an electric coil that vibrated at what I assume was 60 hz. It lost a bit of its shake so I replaced it. In turn I took the old one and used it for the base of my vibrating which I designed to have a track or set of ways on top so I could place keyed mold plates that holds my molds while pouring. I found that the vibrating is good for shaking the plaster int the tight spots, but if I rapped the ways with a rubber hammer I could really move the plaster across the mold. Both action work well together.

      I want to mention that I found that poor pouring practice is 90% the cause of bubbles. If the plaster goes in sloppy, you will get bubbles on the surface. Mind you, this can be something as simple as twitching or tilting the pouring vessel too fast and some plaster splashes into the mold. It's best to pour from one end and let the plaster slowly roll over the mold face to help push the air out. Rap and vibrate while pouring and moving the pour across the mold until full.

      Another side note. you will rarely get 100% bubbles free castings. With more magnification you will see more and more, but you can get close. It's part skill, part voodoo and part luck.
      Russ

      It's not Practice makes Perfect, It's Perfect Practice makes Perfect

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      • #34
        Thanks for the added info. I discovered the tricks you mentioned and I did get better molds.

        Bernd
        New York, Vermont & Northern Rwy. - Route of the Black Diamonds

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        • #35
          It's part skill, part voodoo and part luck.

          That, coming from you Russ-where your business is castings, is one valuable statement!

          Thank you!
          Carl

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          • #36
            I can make a video of my operation which is set up for production and a bit over the top for most modelers. However, as with anything one should be able to get a few ideas of their own from what I show. If anyone is interested.
            Russ

            It's not Practice makes Perfect, It's Perfect Practice makes Perfect

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            • #37
              Have at it Russ. Let's see what you have. The more information the better.

              Bernd
              New York, Vermont & Northern Rwy. - Route of the Black Diamonds

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              • #38
                Agreed. I 2nd that video ! Thanks.
                Carl

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