need help. built a 2 pc. mold. its 48" long by 8 1/2" wide by 2 1/2" high. want to use strongest, lightest most flexible carbon fiber cloth that will get into all the sharp corners. finished boats will be sanded and painted. was thinking of using a bladder system. maybe bolting 2 parts of mold together and pouring 2 part flexible silicone into it with some bladders inside the silicone. slightly inflate bladders in the silicone and let harden. when laying up in the mold, the bladders can be inflated and push cloth into corners. is it doable?. thank for your help.
Sounds like you’d be better using a vacuum bag than the technique you described. Do you have a vacuum pump?
A bladder might deform the mould. Why not make two shells and bomd them
together?
What model boat is it?
I am trying to post pictures, but unable to. I will keep trying. it says security token is missing. whatever that means. notified administrator. my email is urbs00007@yahoo.com if someone wants to help me with this. thanks
Put them (pictures) up on Photobucket or other image storing site and then provide link here.
some photos <a href=“http://s1249.photobucket.com/user/urbs00007/media/P1000985_zpsrh8ldwek_1.jpg.html” target="_blank"><img src=“http://i1249.photobucket.com/albums/hh514/urbs00007/P1000985_zpsrh8ldwek_1.jpg” border=“0” alt=" photo P1000985_zpsrh8ldwek_1.jpg"/></a> 
Nice looking mold. Polyester?
yes, two molds then joined sounds like the way to go. would like to perfect this process with cheap polyester resin and a fiberglass cloth that would closely resemble carbon fiber to save money. then use epoxy and carbon cloth . what fiberglass cloth would work and what vacuum bagging supplies do i need. i have a vacuum pump. i would like to do infusion on this, too. thanks
yes it is. i just laid one up and found it difficult to cut the mat ( .75") to fit in the recessed area.see to the right in the pictures.
where can i buy infusion bag and supplies at a cheap price
There are many places, but I find these people have a great price and service.
http://compositeenvisions.com/
I use AVT in Indianapolis 317-546-6840
You can use fiberglass (7725 I think) and dye the resin 2 per cent black pigment . I would recommend wet-preg method as infusion for the first time would be a big challenge.
ready to try infusion process. I will use 6 oz. fiberglass cloth to keep cost down while learning the process. using composite envisions for supplies. some questions I have before ordering supplies. what size vacuum lines? what size spiral wrap and where to put it? where to start the resin flowing into the part? where to exit? Do I need to de-gas the resin? thanks guys, really appreciate your help here. see pics for reference.
your idea sounds like the way to go. i have all supplies on order. I will vacuum infuse top and bottom, then join together. my question is, how do i trim the top or bottom to get a nice seam which i can join together. when i laid up the 2 halves with fiberglass, i just trimmed excess with razor before layup hardened. with infusion, how can this be done?
I ordered their starter kit last spring. It has everything you need to get going. I have made flat parts using their epoxy without degassing and they turned out fine.
I will let others with more experience answer where the best places are to start and end infusion.