Heatforming foam to compound curvature

Discussion in 'Materials' started by patrik111, Sep 14, 2007.

  1. patrik111
    Joined: Sep 2003
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    patrik111 Junior Member

    Hi,

    Is it possible to heatform compound curvature using corecell/Airex or similar foam core material?

    If so, to what extent?
    My purpose is a female stringed mould with termoformed foam for a beachcat hull. But avoiding the horizontal stripping.

    All input is greatly appriciated
     
  2. KnottyBuoyz
    Joined: Jul 2006
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    Location: Iroquois, Ontario

    KnottyBuoyz Provocateur & Raconteur

  3. patrik111
    Joined: Sep 2003
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    Location: Sweden

    patrik111 Junior Member

    Compound curvature

    Hi,

    What I am looking for is compound curvature, i.e. bent in two directions at the same point.

    The material I find in brochures etc indicate bending in one direction. To a certain extent, it seems to be possible to bend in two directions, but I have no data on how tight radius might be possible.

    BR
     
  4. patrik111
    Joined: Sep 2003
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    Location: Sweden

    patrik111 Junior Member

    It is possible!

    Heatforming Airex to compound shapes is possible. Although the radii possible is quite much larger than possible if curved in one direction only.

    BR
     
  5. lighterisfaster
    Joined: Apr 2007
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    Location: Montreal

    lighterisfaster New Member

    Thermoforming Corecell

    Hi patrik111

    Please contact me at andrew.bellamy@gurit.com and I will be happy to forward you a copy of the Corecell Thermoforming Guide.

    Best regards


    Andrew Bellamy
    Composites Processing Manager
    Gurit (Corecell)
     
  6. kengrome
    Joined: Jul 2006
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    Location: Gulf Coast USA

    kengrome Senior Member

    Hi Andrew,

    Maybe you can post it here so others can download and review it too ... :)
     

  7. FAST FRED
    Joined: Oct 2002
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    Location: Conn in summers , Ortona FL in winter , with big d

    FAST FRED Senior Member

    We have heated Airex into simple (33ft boat) compound curves with a duct from a normal home hot air furnace.

    The wall thermostat was paralleled with an of-on switch and the foam placed in a wide duct for a few min.

    Gloves are needed to remove the Airex and it was placed on the male plug and simply rubbed to get the shape.

    As with most Airex construction the sheet was fastened to the plug by sewing with a needle and heavy thread.
    After the outer skin was laid up the threads were slashed after the hull was rolled upright , and installed in a "keep the hull shape cradle".

    Nice method for one or two boats , but the hassle of long boarding the outer surface to acceptable yacht finish is long and very labor intensive (and boring)!


    I have seen builders that used a hot water tank , and weights to hold the Airex submerged to heat it.

    FF
     
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