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RE: REFLECTOR: Bulkhead Installation
I concur with David:
- put the layups on plastic, one layer at a time, and
- squeegee the heck out of them to remove excess epoxy, but
- don't tear or distort the fibers!
- let it start to get tacky
- lay it up on the vertical surface (an oxymoron?)
- babysit it! keep pressing and smoothing by hand, until it wants to stay put
- (it won't want to stay put, but...) remove the plastic, put on peel-ply
- while doing other useful work to pass the time away, continue to squeegee
stiple the layup until it stays in-place on its own accord, and excess
is into the peel-ply
- go eat dinner
- come back and stiple some more before bedtime
- go to bed
- look at it next morning; by golly, it worked!!!
I never needed to "clamp" any layup, even vertical.
At 08:54 AM 1/15/99 -0500, you wrote:
>From: "Schweitzer, Bill" <firstname.lastname@example.org>
>> I learned that doing multiple layer triax layup is a real gravity defying
>> challenge. We always wet-out the glass on plastic, so that all the plies
>> were well connected and equally wet and well squeegeed (sp?). Then we
>Doing just about any layup on plastic first is the way to go, and the
>thicker/more complex the layup, the more useful it is. But, when
>you have multi-ply triax layups that have to be vertical, I like the
>idea of letting the layup gel a bit before placing it. (Low flow, but
>still very tacky.) Leaving the plastic in place after the layup is put in
>place also slows drainage.
>In fact, though I never tried it, you could have peel ply as the first
>layer on the plastic so it faces out when the plastic is removed.
>Peel ply is great for protecting the glass surfaces from enviromental
>contamination before more layers are added.
>> The trick is to CLAMP EVERYTHING in place with good solid, stiff pieces of
>Be careful about clamping, as you can use too much pressure and
>squeeze out too much epoxy.