Need ideas for lamination panel

Discussion in 'Fiberglass and Composite Boat Building' started by aaronhl, Apr 19, 2024.

  1. aaronhl
    Joined: Aug 2012
    Posts: 351
    Likes: 4, Points: 18, Legacy Rep: 10
    Location: Central Connecticut

    aaronhl Senior Member

    Soon I will need to make a panel approx 2 foot x 4 foot to be used as a panel for making thin sheets of fiberglass,

    I was considering spraying gelcoat over a piece of glass and then building up from there with a thicker core and then covered with fiberglass. The panel would have a smooth finish on one side, because of the glass I sprayed on, and then approx 5/8" thick overall once pulled from the glass...

    Do you think it is a good idea to use a piece of glass to make a smooth panel or do you have any other ideas, overall how do you think this projects sounds?

    The finished panel will be sprayed with pva and then I will lay fiberglass on top to be used for other projects that need a smooth face...I feel it would be a quick use of a makseshift mold, without having to do much finishing, sanding if I build up from the other way and gelcoat last...

    Wondering if I can even get a cheap cutoff of glass, would polyester eat through plexiglass??
     
  2. wet feet
    Joined: Nov 2004
    Posts: 1,432
    Likes: 453, Points: 83, Legacy Rep: 124
    Location: East Anglia,England

    wet feet Senior Member

    Glass will work very well,once coated with release agent.Which leads to the question of why you feel a need to make a panel to lay up on?If the glass is of the sort of thickness that is used for shop windows and similar,it will be more durable than the thinner stuff you might find in greenhouses.I wouldn't expect resin to attack acrylic sheet but would have concerns about some other plastics and would always test a small sample first.A heavy handed laminator who normally pounds the job with a rubber hammer to release an item ought not to be allowed near the project as it will require a more careful approach.
     
  3. TeddyDiver
    Joined: Dec 2007
    Posts: 2,623
    Likes: 139, Points: 73, Legacy Rep: 1650
    Location: Finland/Norway

    TeddyDiver Gollywobbler

    I made once poly/fg seats for a canoe on galvanized steel sheet. Worked fine without any release agent but dunno how that works on a long run. With epoxy I have used any flat sheet (usually ply) covered with brown pvc tape..
     
  4. comfisherman
    Joined: Apr 2009
    Posts: 684
    Likes: 345, Points: 63, Legacy Rep: 10
    Location: Alaska

    comfisherman Senior Member

    I have a table top that has a thick chunk of virgin tivar uhmw sheet. One side was smooth, we did a light sand of a burr or two and then a light polish (uhmw doesn't really polish but it did smooth out some transport scuffs. After that we just wax and layup straight to the uhmw, pops free just fine and dandy and makes a smooth finish.

    Had to box the support table as even 1/2 inch uhmw droops on longer spans. We essentially mounted it to a fabricated flush pallet.
     
  5. C. Dog
    Joined: May 2022
    Posts: 194
    Likes: 58, Points: 28
    Location: Coffs Harbour NSW Australia

    C. Dog Senior Member

    Building laminate like used on kitchen bench tops gives a large gloss surface if adequately supported.
     
  6. fallguy
    Joined: Dec 2016
    Posts: 7,707
    Likes: 1,708, Points: 123, Legacy Rep: 10
    Location: usa

    fallguy Senior Member

    Just buy a one inch mdf panel and do two lifts of epoxy and polish to 400 grit and 5 layers of wax and release agent. It won’t break.
     
  7. aaronhl
    Joined: Aug 2012
    Posts: 351
    Likes: 4, Points: 18, Legacy Rep: 10
    Location: Central Connecticut

    aaronhl Senior Member

    U might be right maybe the glass only would work rather than making a panel from it, I guess my concern is keeping it in the garage, might be heavy and delicate to move around...thanks for the ideas
     
  8. aaronhl
    Joined: Aug 2012
    Posts: 351
    Likes: 4, Points: 18, Legacy Rep: 10
    Location: Central Connecticut

    aaronhl Senior Member

    thank you everyone seems like i am on the ight track and may consider some other materials to pull from
     
  9. kapnD
    Joined: Jan 2003
    Posts: 1,305
    Likes: 414, Points: 83, Legacy Rep: 40
    Location: hawaii, usa

    kapnD Senior Member

    A surfaced plywood sheet would be safer to use than glass.
    I used to make fin panels for surfboard skegs (before they were molded plastics) on a thick glass sheet.
    Probably made a hundred panels before it inexplicably shattered overnight.
    I think the supports under it must have shifted. I’ll never know for sure, but it pointed up the hazards of using glass.
     
  10. C. Dog
    Joined: May 2022
    Posts: 194
    Likes: 58, Points: 28
    Location: Coffs Harbour NSW Australia

    C. Dog Senior Member

    Maybe a hot polyester brew on cold glass upset it? Laminated glass might be more robust, but I stand by Formica sheet.
     
    redreuben likes this.
  11. gonzo
    Joined: Aug 2002
    Posts: 16,836
    Likes: 1,736, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

  12. AndrewK
    Joined: Mar 2007
    Posts: 492
    Likes: 54, Points: 28, Legacy Rep: 344
    Location: Australia

    AndrewK Senior Member

    When I first started experimenting with resin infusion I wanted to see what was happening on the underside so I got a 1.9 x 0.9 m laminated safety glass as in ex shower screen from a demolition yard for $20, the aluminium frame was nice to have too.
    Since then continue to use this for small jobs requiring a glossy finish.

    For a very good finish but not as good as glass sheet I have not gone further than melamine coated mdf 25mm, I sort through the pile of cover sheets and select only sheets with one good face from the local plywood and veneer retailer.
    These have been $25 for the 1.2 x 2.4m and $30 for 1.8 x 2.4m.
     
    ondarvr likes this.
  13. ondarvr
    Joined: Dec 2005
    Posts: 2,971
    Likes: 606, Points: 113, Legacy Rep: 506
    Location: Monroe WA

    ondarvr Senior Member

    As mentioned, the glass itself works very well, many shops use them. Melamine works great too, both are easy to get, easy to work with, can be replaced at anytime quickly, and are relatively cheap.
     
    rxcomposite likes this.
  14. aaronhl
    Joined: Aug 2012
    Posts: 351
    Likes: 4, Points: 18, Legacy Rep: 10
    Location: Central Connecticut

    aaronhl Senior Member

    What do you mean by "surfaced" I am trying to save some effort by using something flat and glossy to simply spray PVA over to make the panel from...
     

  15. aaronhl
    Joined: Aug 2012
    Posts: 351
    Likes: 4, Points: 18, Legacy Rep: 10
    Location: Central Connecticut

    aaronhl Senior Member

    Ill have to look into the melamine wood cuz each piece ive purchased before sees like it has a texture...which i dont think will work
     
Loading...
Similar Threads
  1. magentawave
    Replies:
    4
    Views:
    1,653
  2. swade
    Replies:
    3
    Views:
    1,782
  3. shizlenut
    Replies:
    9
    Views:
    5,425
  4. CaptTator
    Replies:
    32
    Views:
    896
  5. Alistair Perrott
    Replies:
    3
    Views:
    846
  6. fallguy
    Replies:
    7
    Views:
    936
  7. fallguy
    Replies:
    11
    Views:
    954
  8. Wesley2022
    Replies:
    6
    Views:
    1,768
  9. Carlazzomark
    Replies:
    17
    Views:
    1,957
  10. vroomZOOM
    Replies:
    8
    Views:
    2,509
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.