Vacuum Bagging honeycomb core

Discussion in 'Fiberglass and Composite Boat Building' started by ian_upton, May 23, 2007.

  1. Herman
    Joined: Oct 2004
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    Location: The Netherlands

    Herman Senior Member

    I sold the ABN-Amro Volvo70 boats their honeycomb. I guess they were OK with it...

    With infusion, you will surely fill the cells. Will make for a nice resin-rich laminate...

    One of my customers runs an autoclave, built (and sometimes used) for 12 bars, 400 degrees C. It is a relatively small autoclave (120x3 meter or so) and consumes 107 kW of heating power when heating up. I must admit it is research facility, which does help...
     
  2. rxcomposite
    Joined: Jan 2005
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    Location: Philippines

    rxcomposite Senior Member

     
  3. tunnels

    tunnels Previous Member

    Its 5 to 6 layers of glass plus carbon each side , not 56 layers !!
    The panels were used in the construction of Collision bulheads for up front and also watertight panels in the forward end and aft end of the engine room ,these panels were very big and ended up being fitted in two pieces . BY nesting panels together on the big table that had the same glass layups and specifications we were able to produce a lots of panels quickly and efficently with very little waste .
    We had to use human lifting power to move the big panels off the table as we had a tent built and suspended from the ceiling to completely cover and seal the table and 2 meters wide walking space around all sides for comfortable working space.
    So when one 16 mtr x 4 meter panel was release off the table then it had to be man handles out from under the tent and laid on timber laid on the floor to then be cut to the sizes of the bulkhead patterns that had been made !. :D
     
  4. rxcomposite
    Joined: Jan 2005
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    Location: Philippines

    rxcomposite Senior Member

    Tunnels,

    Ok. :) I thought you had a contract for bridge panels.

    Good idea. I do that also. Make the panel as large as I can then cut the parts needed. Saves materials and time.

    Cheers,
    Rx
     
  5. johnhazel
    Joined: Jun 2008
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    Location: Michigan

    johnhazel Senior Member

    In real life they dont. I have done this myself and know well (helped build) composites honeycomb sandwich in 3 separate shops. It's because the vaccume is everywhere inside the bag. The bag pushes against the part giving it a tight squeeze and there is not enouh resin in the cloth to move into the cells of the honeycomb. My experiencce is with fiber to resin ratio of about 1:1.
     

  6. tunnels

    tunnels Previous Member

    Personally i have never used Honeycomb for anything !I understand it has its place !. The amount of resin used in the glass would be a crusial factor also the thickness of the core its self .Like all things there tricks to what we do .

    Keep the information coming this is all good stuff!!:p
     
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