Mould parting delam

Discussion in 'Fiberglass and Composite Boat Building' started by fallguy, Apr 26, 2018.

  1. fallguy
    Joined: Dec 2016
    Posts: 3,086
    Likes: 357, Points: 83, Legacy Rep: 10
    Location: usa

    fallguy Senior Member

    Has anyone ever experienced delamination on vac table parting?

    I was wondering if heat blankets after vac is off would help. Plan to test.

    What is the typical time on the mold for super slow epoxies? We were releasing at 16 hours. There were no visible edge issues because we use a metal trowel, but there are visible issues in the middle where we popped the parts off the table. Maybe I need a 2’ long spatula!

    Any remedies; has anyone ever seen these parts fail in service?

    The delam is like a little line here and there, but no major single area. Still sucks....

    Amateur here....
     
  2. SamSam
    Joined: Feb 2005
    Posts: 3,859
    Likes: 180, Points: 63, Legacy Rep: 971
    Location: Coastal Georgia

    SamSam Senior Member

    Did you ever solve this problem?
     
  3. fallguy
    Joined: Dec 2016
    Posts: 3,086
    Likes: 357, Points: 83, Legacy Rep: 10
    Location: usa

    fallguy Senior Member

    I resolved it wasn’t parting delam, but I am still unhappy with my bondline adhesion between corecell M and 18oz biax with Silvertip using vac. I tried all but hand laminating so far. Backing off the vac just results in heavier parts.

    The title of the thread is sort of wrong....couldn’t figure out to change.

    I need to do some mad and out there tests and see if anything works or if nothing is any better.

    I’m a little worried the epoxy is the culprit.

    I followed the Gurit recommendations, but now goong to try some other epoxies, go away from the vac, etc. Honestly, I doubt anything will behave much better.

    The test results in a fine layer of glass; sheen/gloss on reverse.

    I sort of realized the issue by accident and assumed things were great.

    A few other guys have told me to expect it, but I am a bit annoyed.

    Going to even do an infusion test in a couple weeks. Got a lot of other stuff until then.
     
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