Part rubber part hardcase GRP tooling

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  • He Who Shall Not Be Named
    Moderator
    • Aug 2008
    • 12254

    #16
    Originally posted by trout
    What is that black box with fibers coming out?
    Again pictures to pour over.
    It's called a 'chop-gun'. It both cuts a long glass rope into short length shards, and sprays them onto the wetted GRP lay-up. Like so: https://youtu.be/XHQYYRl5fjw

    I found it the only economical way of quickly building up a GRP hull that has facetted surfaces and deep draft cavities. Traditional hand lay-up of glass cloth just won't cut it with such a tool of complex geometry.





    Also, using industrial spray equipment to lay down the PVC barrier and gel-coat expedited the work immensely.



    David
    Who is John Galt?

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    • Subculture
      Admiral
      • Feb 2009
      • 2119

      #17


      Regarding joining two halves of a hull, I saw this vid sometime back which inspired me using a custom made bladder to get the join to conform. I love those elegant lightweight layups the aeroplane guys make.
      Last edited by Subculture; 03-17-2019, 07:17 PM.

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      • He Who Shall Not Be Named
        Moderator
        • Aug 2008
        • 12254

        #18
        Originally posted by Subculture


        Regarding joining two halves of a hull, I saw this vid sometime back which inspired me using a custom made bladder to get the join to conform. I love those elegant lightweight layups the aeroplane guys make.
        Thanks for putting me onto these videos, Andy. I'll spend the next six hours watching GRP porn. Wow! This guy has it all in one sock!

        David
        Who is John Galt?

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        • Subculture
          Admiral
          • Feb 2009
          • 2119

          #19
          The other videos found interesting was this one, again a fuselage moulding, but slightly more conventional technique.


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          • Bob Gato
            Captain
            • Feb 2019
            • 826

            #20
            Thanks David for posting that-It tends to keep the gears turning-

            Admiral Trout-I think that black box with the fibers is a glass chopper-I am pretty sure it sprays chopped glass into the resin coated mold-hence the mess on the floor!

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