cmjets

Hello Friends:

I am experiencing with honey comb, someone has experience with this material ? At the moment I only made flat plates qith diferent materials, I put photos. In the fibre glass plates I put peel-ply in one side.

But... the question is how aply the epoxi over the second layer over the honey comb in a mold ???

Because this plates I made between glass and I laminate the fiber over each glass, but in a mold one layer is laminated direct over the mold and the second is laminated over the honey comb.

Many thanks in advance.

Regasd from Spain.
Carlos Márquez
_____________________________________
http://cmjets.blogspot.com.es/

Robrow

Carlos, you will get the best results using polyurethane sheet, comes in varying thicknesses and the thinner sheets will conform to compound curves if required. Vac bagging and resin infusion will yield the best results in terms of strength/weight ratio.

Hope that helps.

Rob.

cmjets

Hi Rob:

I made this plates only for see the structural strength, but now I want aply in the molds, with vacum of course, but the question is how to aply the layer on the honey comb ?

If I use infusion system the honey comb gaps will be filled, right ?

Thanks for your help.

Carlos Márquez
_____________________________________
http://cmjets.blogspot.com.es/

JetBravo

You would need to do it in two steps. First do your gel coat and fiberglass layer under vacuum as you would with any lay up and let it fully cure. Then the second step would be to apply a low viscosity resin as an adhesive for the honeycomb (nomex honeycomb is flexible) to stick too. Lay the honeycomb in the mold. Then you need to prepeg any of the fiberglass layers that will be applied over the honeycomb. Slow cure resin is a must, it will give you the time needed to place it properly and set up your vacuum. Then let it cure.

If you have an autoclave or oven you can do all of this in one step using prepeg cloth with a heat cured resin under a vacuum.

Good luck!

A7Bldr

My Feedback: (40)

I'm wondering why you couldn't lay out the correct amount of cloth on a flat table, wet it out, then, pick it up and lay it on the honeycomb?
Not too many of us have pre-preg.
Jim

Ron Stahl

My Feedback: (12)

Jim you can do that and for small pieces its ok. Here's what I do for large ones. Start with a layer of plastic, wet it out to stick the peelply to and them lay the glass or carbon in reverse order and wet it out. I now pick up the layup and with help flip it over onto the honeycomb. I remove the plastic layer and bag as usual.

cmjets

Hi:

Thanks. I will try follow these steps and them I will tell you.

Regards.
Carlos.

Flynstuff

My Feedback: (29)

Pre-Preg is not that hard to get. The best way is to lay-up and cure skins is under vac.
Then use film adhesive on inner skins, lay out the core put top skin on pull no more that 8-10 Inches and cure in oven @ 200Deg for about 2.5 hours.

The one problem you get with trying to use non cured material on core especially nomex is you will get imprints of the cells all over.

felicitero

comes in varying thicknesses and the thinner sheets will conform to compound curves if required.