I’m making a CF hood. I’ll be making 2 pieces; the outer skin and the inner frame. (This will be very similar to the hood “dual twill” did.)
My question is; once I have made the two pieces, what is the best way to bond them together?
I use Marine grade Bostik Marine adhesive.
we use Hysol’s EA9394 epoxy. Just make sure whatever epoxy you use, that the 2 joining surfaces are roughed up (50-80 grit), or you used peelply in those areas during cure.
since we are on the subject…anyone wanna clue a brotha in on what they would use to seam together a “tank” of sorts?
Imagine you have two halve and not any real way to tape it together like you would with say a tube…what would work there?
Im seriously thinking of attempting a MC gas tank…but Im pretty sure Ill ruin it about 27 times.
hmm…I would say any sort of high-strength epoxy.
Hell, you could also invest in water-soluable tooling mold stuff (like plaster, but washes right away, and is machinable!) in a compression mold.
You will have a one piece tank.
However, I don’t know how normal CF tanks are made…
Been making bikes tanks for about 2 years. These are made of fibre glass, and the 2 halves are bonded together using polyester bonding paste.
Not had any problems whatsoever, but know there can be problems with the high ethanol fuels used in the US.
Chris
poly binding paste?
Do you just “butt” the two edges up with the paste applied?
Is that like a contact cement?
Awwwww…“trials biking”…I loved that in my younger days but I got hurt more doing that than the many years of MotoCross racing!
Polyester bonding paste is that PER with micro ballons or talc?
I have in the past made bonding paste by adding colloidal silica to lay up resin. While working very well, making bonding paste in this way is very messing, and as MEK must be added before the silica, it does take quite a long while to harden.
Now use ready mixed bonding paste, which comes in a 5kg container, and just needs MEK adding. This is far easier than mixing your own, and hardens far quicker.
Finally anyone thinking of making tanks in the US would probably be well advised to look at lay up using vinyl ester, as this is far more resistant to alcohol fuels than poly.
Chris
Yea when I was working on building racing yachts we used to mix aerosil with are resin to make a glue, this is extreamly strong especially when used with epoxy. To give you some idea we used to glue carbon plates into the bulkhead and this would take around 13 tons of pulling load!
If you want to fill areas then a qcil is better as it is strong yet more sandable.