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Materials Used To Make WTC Discs, End Caps

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  • Materials Used To Make WTC Discs, End Caps

    Hello
    I was thinking of building a few WTC for my own use. After thinking about it I have to ask here. What materials would be Good to use to make "discs" ( End caps, section discs)? What I planned on doing was use a Larger diameter mold and pour a mixed material to solidify and then turn down on my lathe and make O ring groves etc.
    Important factors at least I think; water proof/resistant, shrink resistant, temperature variation safe, light.

    Anyone ever made your own discs? Besides using a plastic disc and turning them to a desired diameter?

    Interested in seeing what is used.
    Thanks
    George

  • #2
    https://www.alumilite.com/store/p/66...-RC-3-Tan.aspx

    David
    "... well, that takes care of Jorgenson's theory!"

    Comment


    • #3
      Wow was not expecting you to respond. Thanks
      However, a LONG TIME AGO, did you not have a problem with some product you used to make your discs and experiencing shrinkage?
      I thought about using marine bondo etc. Will have to look for a source of resin here in Canada.
      Thanks
      George

      Sorry forgot to ask, if I use the resin product, what is BEST to use as to make sure it does not stick to my larger round molds, I was thinking of just Cheap, unused PVC pipe cut into discs for the round large molds but what to use so the resin don`t stick, duct tape? Plastic wrap?
      Last edited by george; 08-31-2018, 10:13 PM.

      Comment


      • #4
        Originally posted by george View Post
        Wow was not expecting you to respond. Thanks
        However, a LONG TIME AGO, did you not have a problem with some product you used to make your discs and experiencing shrinkage?
        I thought about using marine bondo etc. Will have to look for a source of resin here in Canada.
        Thanks
        George

        Sorry forgot to ask, if I use the resin product, what is BEST to use as to make sure it does not stick to my larger round molds, I was thinking of just Cheap, unused PVC pipe cut into discs for the round large molds but what to use so the resin don`t stick, duct tape? Plastic wrap?
        I cast ALL resin bulkheads oversized in diameter. As the tolerance of Lexan tube is sloppy, I custom machine (lathe or mill) each resin bulkhead to fit the cylinder with a very slight interference fit.










        I swear by this mold/part release agent http://www.mann-release.com/erelese2.htm

        David
        Last edited by He Who Shall Not Be Named; 08-31-2018, 10:51 PM.
        "... well, that takes care of Jorgenson's theory!"

        Comment


        • #5
          Thank You for your information/reply/help.
          George

          Comment


          • #6
            anytime.

            David
            "... well, that takes care of Jorgenson's theory!"

            Comment


            • #7
              If you want too turn end caps why cast your material? Buy a piece of 3 or 4 inch solid PVC rod , knurl turn groove and part .
              save time effort and money.

              Comment


              • #8
                Any material better to work with then others, in terms of sticking the seal casing to the disc? So they don`t pop apart under vacuum/pressure? What do you use to glue the push rod casings and drive shaft casings to the disc?

                Comment


                • #9
                  Nasty old RTV sealant/gasket-maker/whatever











                  David
                  "... well, that takes care of Jorgenson's theory!"

                  Comment


                  • #10
                    Hello
                    Thanks again for the info. Time to go PYC shopping and RTV from Canadian Tire.
                    George

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