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a few Carbon Fiber questions guys

Printed From: the12volt.com
Forum Name: Fiberglass, Fabrication, and Interiors
Forum Discription: Fiberglass Kick Panels, Subwoofer Enclosures, Plexiglas, Fabrics, Materials, Finishes, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=48867
Printed Date: April 29, 2024 at 5:17 AM


Topic: a few Carbon Fiber questions guys

Posted By: Captanham
Subject: a few Carbon Fiber questions guys
Date Posted: January 29, 2005 at 11:15 AM

ok, so i'm not to bad with the fiberglassing thing, and i have read about cf, i know all the resins you have to use, and stuff like that..... my question is that when you see carbon fiber, it looks like it has some depth in the texture.. is this effect acheived with only one layer of mat? and what kind of tricks are there to maintaining a steady texture without having seams show up especially on complicated designs with many curves? that's the only think i've really wondered about, i figure on something like the hood of a car that people just use one really big matt, but for dashes and what not... i'm not sure, cause there isn't a way that i can figure to get one mat to curve like you would need it to curve to not have to cut it and get seams, anyways, write me, haha

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Replies:

Posted By: TheSaint421
Date Posted: January 30, 2005 at 9:05 AM

first off, when you see a nice curved CF piece, usually it's done in a negative mold... you get the 'depth' in the weave because there is a lot more epoxy resin used in CF opposed to whats used per layer in fiberglass. the inside of the mold (outside of the finished piece) is very, very smooth, and thats why you get that nice thick layer of resin on the outside of the CF piece.  without a negative mold, or a mold period, eliminating the seams will be next to impossible..

If you wanted to make some flat panels, then take a piece of glass, ( real glass ) and lay a square of Cf on it, soak it in resin, then take another piece of glass and sandwich the Cf in between, then you could make flat piece to use as accents or whatever, and you would get a nice deep weave pattern in the piece. but other than that your options are limited

The Saint





Posted By: bluetruck
Date Posted: January 30, 2005 at 2:31 PM
CF is very hard and very expensive. the only way i know to learn to do it is (A) have deep pockets for trial and error or (B) apprentice with a pro. good luck bro.




Posted By: Captanham
Date Posted: January 30, 2005 at 3:54 PM
yea, i was just going to f**k around, do some of my dash stuff, i know it's costly, but i'm willing to waste a little money just to learn sh*t, encase i would ever have to do it, but i'm not going to waste tons and tons trying to be an expert at it, i don't think it would be too hard to do small flat stuff, but i didn't know about coating sh*t like dash panels or things like that, haha

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Posted By: Captanham
Date Posted: January 30, 2005 at 3:56 PM
haha thank god it censors me, i might curse a little to much, haha, but yea, thanks for your help guys, i might buy some just to f**k around, but i don't think i'll really try to get into it that much, has any of you guys done any big sh*t with C F?

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Posted By: FORSFED
Date Posted: February 03, 2005 at 3:42 PM
You'd be surprised how well CF will lay around curves and bends, but a lot of it has to do with the weave you use. Two of the most common weaves are the plain weave and twill weave. The plain works well for flat panels and doesn't wrap around things easily. Twill weave on the other hand easily molds around contours because the way the fibers are woven allow it to move easier. I made a carbon fiber overlay of the dash in my Talon with a twill weave. Here are a couple of pics::posted_image




Posted By: FORSFED
Date Posted: February 03, 2005 at 3:46 PM
And one of the finished dash in the car::posted_image




Posted By: FORSFED
Date Posted: February 03, 2005 at 3:58 PM
Hmmm, not sure why that didn't work, I'll try this one
posted_image




Posted By: Captanham
Date Posted: February 04, 2005 at 9:03 AM

that's cool, that looks really good man, i might try it, the only cf place i know of is select, i can get clear resin anywere, do you know of any other places to get the mat or is select my best bet there?



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Posted By: dowmace
Date Posted: February 04, 2005 at 12:03 PM
www.fibreglast.com they sell all the CF stuff you'll need at I'd say fairly good prices.

If your going to do anything big you need to learn about a technique called vacuum bagging it's how you can get those pieces so smooth and not have to sand and ruin your CF look.




Posted By: Captanham
Date Posted: February 04, 2005 at 12:14 PM
can you tell me anything about that process? does it involve expensive equipment, i'm at a shop, but we don't really focus much on the fab stuff, so i don't really have a budget for equip..  or is there a site that i can look at to learn more about the process? thanks for all your help so far

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Posted By: Captanham
Date Posted: February 04, 2005 at 12:29 PM
also, what is the difference between kevlar hybrids? i know the kevlar is suposed to have a lot more strength, but is it a lot harder to lay also? and the main reason i'm curious about this is because the kevlar is the only colored cf i have found, would it be just as easy to dye the clear resen? any recomendations here? and i looked up vacuming, it doesnt look THAT complicated, it basically says on that site you posted that the vacuming is just to get rid of excess resin, would that make it perfectly smooth for sure? sorry to ask so many questions, i'm just trying to not go into this blind. thanks for your hel

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If you use it. Suport it. Donate to the 12 volt!




Posted By: FORSFED
Date Posted: February 04, 2005 at 1:12 PM
What you're saying isn't completely true. There are about three useful techniques that can be used to lay CF, all of which when done correctly will give you an absolutely beautiful piece of work. As a matter of fact, it's more about the finishing process that gives it the look.

The dash overlay I did was simply an overlay, no vacuuming involved. Overlays work very well and give you a nice result. The glass method mentioned earlier works awesome for flat strutcural panels. The thing vacuum bagging does better is that it makes your part as light as possible. Say you use 5oz of mat, the vacuum squeezes out all the excess resin you may have used so that the final piece only has a max of 5oz of resin. And actually when released from the mold it actually comes out looking like raw CF and would need to be gel coated for that deeper, glossy look. It really just comes down to what your after, looks, lightweight, functionality, etc to choose the right method. You also need to consider cost in the matter. Overlays are cheap because all you need is resin and mat. Vacuuming gets spendy because you need the pump, molds of all your parts, vacuum bags, filler material, the "sponge" material that soaks the resin, and the list goes on. Hope that helps put it in a little more perspective.






Posted By: FORSFED
Date Posted: February 04, 2005 at 1:15 PM
I was trying to quote dowace in that last post, sorry.





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