infusing a multi part mold

Discussion in 'Fiberglass and Composite Boat Building' started by Fgayford, Jan 15, 2012.

  1. Fgayford
    Joined: Nov 2011
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    Location: Cambridge Ontario Canada

    Fgayford Junior Member

    How does one go about infusing a 3 part mold.The part lines would be air leaks. Is there a way?
    Thanks.
    Fred
     
  2. Herman
    Joined: Oct 2004
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    Location: The Netherlands

    Herman Senior Member

    Envelope bagging for small moulds.

    Or if that is not possible, I once infused a multipart mould (boat) which had a recess for a line of sealant tape. The mould builder had been thinking BEFORE making the mould. Quite impressive.

    Also possible but cumbersome is to bag the seam on the outside. Through-bolts then are a concern.
     
  3. Fgayford
    Joined: Nov 2011
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    Fgayford Junior Member

    Thanks Herman
    Was the recess line in between the flange before the bolts, kind of like an o ring arangement? If so I imagine you lay down the sealant tape in the groove and then bolt together squashing the tape for the seal.
    If not could you please explain further.
    Thanks again.
    Fred
     
  4. Herman
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    Herman Senior Member

    The recess should be near to the part. the bolts should be outside of the cavity, as these can only create havock. Trying to make bolts airtight is no fun.
     

  5. Herman
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    Location: The Netherlands

    Herman Senior Member

    Oh, there is also some special (reusable seals for them, but these are designed to go all the way round (RTM / RTM light.) where these are used for sealing the top mould on the bottom mould.
    Creating a subtle end arrangement for these seals is somewhat difficult.
     
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