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SergioLavalle01
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Hi: I want to make a hollow tube for an aerobar shaped lik " _/ " I was thinking on making it with an inflatable blader and a epoxy mould sliced in 2. What do you recomend?
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MAVERICK
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Hey Sergio,
I've heard on here somwhere that somebody have used RTV silicone for this sort of job, I think the idea is that you would make your split mould then fill it solid with silicone. then remove this from the mould after it has cured and wrap it with carbon (I bet the carbon fibre braided sleeve would be great for your job) when you clamp this into the mould you put it into an oven and the silicone expands with heat putting pressure on the laminate. For an inflatable bladder you could use a latex bike inner tube... you would need to cap the ends though, and make sure your mould was tough otherwise it'd go bang in a big way!
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mhdghoul
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at ec they have tubes from cf with many diameters u can cut it and attatch it angled the way you want and stiff it from inside and out side too
best regards mhd alghoul mhdghoul@hotmail.com youtube channel :atmospherejo link is http://www.youtube.com/user/atmospherejo?ob=0&feature=results_main
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ant...
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MAVERICK (13/03/2012)
Hey Sergio,
I've heard on here somwhere that somebody have used RTV silicone for this sort of job, I think the idea is that you would make your split mould then fill it solid with silicone. then remove this from the mould after it has cured and wrap it with carbon (I bet the carbon fibre braided sleeve would be great for your job) when you clamp this into the mould you put it into an oven and the silicone expands with heat putting pressure on the laminate. For an inflatable bladder you could use a latex bike inner tube... you would need to cap the ends though, and make sure your mould was tough otherwise it'd go bang in a big way! Maverick - I like this idea, im gonna try this one day. If you were making a tube though, how would you get the silicone out? mhdgoul's idea seems best for this situation IMO, making tubes that look nice and straight is a pain. Id like to know where you could get the equipment to make your own inflatable bladers though???
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Matthieu Libeert
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Hi, I'm planning to do the same kind of stuff but on an easier scale, just for testing the technique... This is the way I think i will do it: I've ordered the Carbon braided sleeve 10mm a few days ago and the shipment will arrive tomorrow I think 1. I'll go get a PVC-tube, and cut it in halve 2. apply mouldrelease on both halves 3. Put an innertube of a bikewheel on the inside of the Carbon Fiber braided sleeve (also with lots of mouldrelease) 4. Coat the Sleeve with epoxy 5. Close the 2 PVC-tubes with some ductape I guess 6. Inflate with some compressed air 7. Let it cure If possible I will pick something other than PVC so I could maybe put it in an oven to cure it with some heat.
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jim
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babolat uses prepreg carbon in an aluminum halved mold. they roll the precise layers of prepreg into this mold and then they pressurize the mold to push the carbon out into the mold. then they send it into the oven. the raquets come out precise every time. i'm not sure you can improve this engineeing, but if you have any ideas, i'd sure like to see them.
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Manu
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hello! I also want to make carbon tube, in my case the most important is the lowest cost, my method will be the next, impregnated with epoxy a piece of carbon fiber cloth in a plane, allow it to reach its gel state, and use it as a pre-preg. Once I have this wrap it inan aluminum tube with mold release this tube is placed in a mold that I made properly to have the outer diameter desire and finally a curing oven. Once fully cured, with a slightblow to the aluminum tube that goes inside the carbon tube and ready to make more tubes!
www.ktuning.es https://www.facebook.com/Ktuning.es/
www.carboncycleparts.com
https://www.facebook.com/CarbonCycleParts/
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prsw
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Yes, EC do you have any contacts with materials for making bladers? Ant, the silicone can be removed because it is cut up like a puzzle, it fits together but you can remove it piece by piece from one end of tube. This is how BST make CF wheels for motorcycles, they claim to have a patent for the method.
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H4RTM4N
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Hey guys, This is a very interesting post. I want to make a long, hollow CF/EP tube to record with my GoPro. I could use an aluminum tube to make a half-mould. From there, I would make two halves and then glue them together. However, the joint would be visible and the tube wouldn't be as strong as a hollow, one-piece CF/EP tube. Using an Inflatable Bladder would certainly be the best idea. I carried out some research and I found some interesting videos/posts from a very clever guy that makes his own R/C planes. Making an Inflation Bladder for Assisted Composite Part Fabricationhttps://vimeo.com/10665397Layup of The Wyoming Wind Works DLG Fuselagehttps://vimeo.com/35648020Demolding of the Wyoming Wind Works DLG Fusehttps://vimeo.com/37883424I still don't understand how putting reinforcements and resin in each side of the mould separately ends up in a solid piece when the mould is closed. There has to be some overlapping that the bladder is pressing against the mould or another clever solution. Trying to find and answer to this, I found this interesting post: Closed-Mold Vacuum Infusion with a Bladder |
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Zebra
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For simple shapes like a tube, you could use a regular long balloon as your inflatable bladder. You won't even need a compressor. You just blow up the ballon inside the tube cavity until there is enough pressure. The. Pop it when it's cured.
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