3k should be fine. As a rule I usually go off of the fabric's weight per yard/meter sq. So if I've got a 6k, 12oz cloth I want to match; I would use two 3k 6oz layers to make it work.
I'm not an engineer so I may be wrong in my assumption. However, going off of weight makes the most sense to me- That is when figuring out how much CF to use when selecting a different tow size.
I'm looking at your site, first, I'm gonna try to do a spoiler because I think is a easy project to get into the world of carbon fiber, I will send you some images, but i still have some doubts, the flox is just cotton with epoxy to give more firmness to epoxy to avoid this spill the edges, really?, and how many powerful is your vacuum pump, how many CFM's or torr is.
The spoiler project sounds great. The cotton flox creates a strong hard filler when added to the epoxy. If you just need a filler that's easy to work with, that doesn't have to be real strong, then glass balloons would be a better choice.
My vacuum is a Gast 5.5 cfm continuous run pump and pulls about 26" Hg. I've actually got the pump hooked up to a kit with an auto shut off switch and vacuum reservoir. You can get by with a lot less, but I like mine- Send me a PM for more details.
It mostly is joined together with the resin used in the layup. Because the EZ-poxy (resin) takes 12 hrs to cure, I decided to used 5 min epoxy to "tack" everything together. Then I filled the joints with flox and resin and then the carbon fiber reinforcement on top of that.
The best temperature for curing epoxy is relative to the epoxy used. I think that most hand-layup epoxies are recommended to be cured at 25 deg C. Some epoxies even have recommended post curing temperature and duration in order to get a stronger epoxy cure. Just check with the epoxy manufacturer's recommendations to get the best results.
For the EZ-Poxy I cured at around 25 deg C and then made sure it got up to about 50 deg C for a few hours to ensure a good post cure.
You'll have to watch the next video. The tubes were only tacked together with the 5 min epoxy. The tube joints were then filled with aircraft grade epoxy and a cotton-flox slurry/filler. Once the joints were filled and sanded smooth they got 3+ layers of carbon fiber reinforcement.
You're right though, joining your tubes together with only 5min epoxy is not a good idea- At least the kind I used; there's probably some type of 5 min epoxy out there that would work though. lol
Hey ... i just found a 3k Carbon fiber fabric here in brasil... is that good for that job?
LuizEggers 1 month ago
@LuizEggers
3k should be fine. As a rule I usually go off of the fabric's weight per yard/meter sq. So if I've got a 6k, 12oz cloth I want to match; I would use two 3k 6oz layers to make it work.
I'm not an engineer so I may be wrong in my assumption. However, going off of weight makes the most sense to me- That is when figuring out how much CF to use when selecting a different tow size.
Someone correct me if I'm wrong.
TheProjectJunkie1 1 month ago
Dude...i just like to build stuff like u. and i like bycicles too...i will be in contact with you ...its really really interesting
LuizEggers 1 month ago
@LuizEggers
Sounds great! Bikes are great projects to undertake so good luck with your endeavor.
TheProjectJunkie1 1 month ago
I'm looking at your site, first, I'm gonna try to do a spoiler because I think is a easy project to get into the world of carbon fiber, I will send you some images, but i still have some doubts, the flox is just cotton with epoxy to give more firmness to epoxy to avoid this spill the edges, really?, and how many powerful is your vacuum pump, how many CFM's or torr is.
AZURA888 2 months ago
@AZURA888
The spoiler project sounds great. The cotton flox creates a strong hard filler when added to the epoxy. If you just need a filler that's easy to work with, that doesn't have to be real strong, then glass balloons would be a better choice.
My vacuum is a Gast 5.5 cfm continuous run pump and pulls about 26" Hg. I've actually got the pump hooked up to a kit with an auto shut off switch and vacuum reservoir. You can get by with a lot less, but I like mine- Send me a PM for more details.
TheProjectJunkie1 2 months ago
Comment removed
AZURA888 2 months ago
Why the frame cannot just be joined with the resine used to do the carbon fiber tubes?.
AZURA888 2 months ago
@AZURA888
It mostly is joined together with the resin used in the layup. Because the EZ-poxy (resin) takes 12 hrs to cure, I decided to used 5 min epoxy to "tack" everything together. Then I filled the joints with flox and resin and then the carbon fiber reinforcement on top of that.
TheProjectJunkie1 2 months ago
How many celsius is the best temperature and the time.for curing the resine.
AZURA888 2 months ago
@AZURA888
The best temperature for curing epoxy is relative to the epoxy used. I think that most hand-layup epoxies are recommended to be cured at 25 deg C. Some epoxies even have recommended post curing temperature and duration in order to get a stronger epoxy cure. Just check with the epoxy manufacturer's recommendations to get the best results.
For the EZ-Poxy I cured at around 25 deg C and then made sure it got up to about 50 deg C for a few hours to ensure a good post cure.
TheProjectJunkie1 2 months ago
dayumm that's gonna be a nice bike.
kanimate 3 months ago
man using 5min epoxy for joining all tubes is not so good idea, because its not so strenght like slow curing epoxy!
pangrac1 3 months ago in playlist Další videa uživatele TheProjectJunkie1
@pangrac1
You'll have to watch the next video. The tubes were only tacked together with the 5 min epoxy. The tube joints were then filled with aircraft grade epoxy and a cotton-flox slurry/filler. Once the joints were filled and sanded smooth they got 3+ layers of carbon fiber reinforcement.
You're right though, joining your tubes together with only 5min epoxy is not a good idea- At least the kind I used; there's probably some type of 5 min epoxy out there that would work though. lol
TheProjectJunkie1 3 months ago