mold thickness

Discussion in 'Fiberglass and Composite Boat Building' started by JEFFHEENAN, Oct 28, 2015.

  1. JEFFHEENAN
    Joined: Oct 2014
    Posts: 26
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    Location: MONTANA

    JEFFHEENAN Junior Member

    Hello, my question is how many layers of 1.5 0z should I make my mold? It is a 16 ft driftboat plug. How many layers can I apply at a time?
     
  2. TANSL
    Joined: Sep 2011
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    Location: Spain

    TANSL Senior Member

    It would be good to know how you built your mold, loads must withstand, how you intent reinforce it, and how many times you need to use it.
     
    Last edited: Oct 30, 2015
  3. waikikin
    Joined: Jan 2006
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    Location: Australia

    waikikin Senior Member

    Jeffheenan,

    You need to talk to your resin supplier, you may like to consider an alumina trihydrate filled resin system, they come highly recomended as a time saver especially for a small vessel.
    Otherwise you need to start with tooling gelcoat then surface tissue on the same day then a layer of 3/4 split strand chop the next then no more that two layers of 450gsm per day... until you have about 2.5-3 times the glass content of a finished hull.... you can after about 2700gsm lay some coremat or upica then same amount of laminate less the tissue & 3/4 split... then you need to frame up... along the keel, chines(if present- or bilge & sheer... try to avoid transverse framing in contact with exterior of tooling or minimise to light tabbing. There is your layup schedule to consider & if you need to employ split tooling or a have a rolling frame incorperated esp for ergonomics.

    Jeff.
     

  4. ondarvr
    Joined: Dec 2005
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    Location: Monroe WA

    ondarvr Senior Member

    Are you making the mold, or the plug? I wasn't 100% sure from your question.

    There is more to making a mold or plug than just how many layers of mat to use. Is this going to be a long term production mold, or a short term for you and a couple of buddies type thing?
     
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