Carbon overlay

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fallguy1000
* Bateau Builder - Expert *
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Joined: Tue Jan 12, 2010 12:25 am

Re: Carbon overlay

Post by fallguy1000 »

So, the stack is as follows:

1. Vac table
2. Wax
3. 1/4" tempered glass
4. Wax, left slight smearing
5. Pretty thick coating of sunshield.
6. Epoxy
7. Carbon/aramid
8. 6 oz woven
9. Peelply
10. 10mm bleeder
11. Breathe media
12. Bag

I might have effed it up and gone too soon, but I was way over an hour from spray time.???

If the surface is all effed; it will mean my epoxy and sunshield combined.

I would do it differently next time and roll the wetted glass onto the Sunshield to make sure to not overwork or disturb the poly layer. (If the surface seems off).

Or. I could go a little more catalyst. This was just a sample!
4FECFDCE-EEFF-47BC-B04D-A4095C8DEEF1.jpeg
My boat build is here -------->

viewtopic.php?f=12&t=62495

fallguy1000
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Posts: 10198
Joined: Tue Jan 12, 2010 12:25 am

Re: Carbon overlay

Post by fallguy1000 »

Well. Some lessons learned.

Next time a little more catalyst. It did not kick quick enough.

Will wet out carbon on plastic amd move to the mould.

The epoxy wax uneven because I poured it on top the sunshield.

This led to waviness.

The Sunshield got pushed away during wetout on the edges.

Sample again Thursday.

This is sanded 400 grit and stop on fail.
77D44513-0F94-4E8F-A1ED-97AA7C0D0257.jpeg
My boat build is here -------->

viewtopic.php?f=12&t=62495

fallguy1000
* Bateau Builder - Expert *
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Joined: Tue Jan 12, 2010 12:25 am

Re: Carbon overlay

Post by fallguy1000 »

So, finally some success!

I made a new part. Built a dust tent.

I had a lot of trouble with the Sunshield fisheyeing.

I was about to give up; But it seemed like the fisheyes were shrinking.

Finally, I sprayed a couple more coats and the stuff sheeted out!

Another forum guy told me my wax is wrong. Too slick actually.

Anyhow, I heated the mold all day today and the part looks good!

So, tomorrow, a trip for different wax...

The back of the part has an excess of resin here. I think the bleeder release had a crease.
265BF4D4-4AB0-4C86-883E-E8DC3D1FB321.jpeg
Dust tent
902E1F35-A608-408E-AEF6-75B351CD1B43.jpeg
Prior to spraying I think.
780634E3-E40A-44D1-9C38-8713E995C8C3.jpeg
The sample part looks good except the ridgelines show through.
F8B2CD03-D3E7-42FE-A979-2C3058ADE711.jpeg
My boat build is here -------->

viewtopic.php?f=12&t=62495

fallguy1000
* Bateau Builder - Expert *
* Bateau Builder - Expert *
Posts: 10198
Joined: Tue Jan 12, 2010 12:25 am

Re: Carbon overlay

Post by fallguy1000 »

Well, what a weekend.

Friday, I sprayed the mould. It cratered. For those that don't know what a crater is... I give you craters. Just under the size of a dime.
8F21B11E-ED8E-4FD2-A39C-A7279E55C1DC.jpeg
Took the topcoat off Saturday. It was 12 mils. I was hoping for 20; so obviously thin. But I was out of Sunshield.

Today, got more Sunshield and sprayed a whole quart on the mould. First batch had acetone. Second none. Both backbrushed and sprayed over. I think it'll work. Very few defects. Hoping it cures and tomorrow I will lay the carbon.
My boat build is here -------->

viewtopic.php?f=12&t=62495

fallguy1000
* Bateau Builder - Expert *
* Bateau Builder - Expert *
Posts: 10198
Joined: Tue Jan 12, 2010 12:25 am

Re: Carbon overlay

Post by fallguy1000 »

It is under the glass. Looks stellar.

One flaw on an edge; shoukd cut away.

The glass has polyester overspray under; disregard.
80BF4FA4-2F7C-4586-9527-C4AC29B1DC59.jpeg
My boat build is here -------->

viewtopic.php?f=12&t=62495

Jeff
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Posts: 8436
Joined: Fri Apr 29, 2016 12:17 pm
Location: Vero Beach

Re: Carbon overlay

Post by Jeff »

Nice work FallGuy!!! Jeff

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