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Quick Question About Epoxy
Posted: Wed Apr 02, 2008 11:22 am
by e1337
Can a marine grade epoxy hold up to 1000psi? Also can it hold up to liquid CO2? And is it possible to turn on a lathe?
-e1337
Posted: Wed Apr 02, 2008 11:29 am
by Carlman
umm it all depends on what you are bonding really
as to lathe, maybe but why?
Re: Quick Question About Epoxy
Posted: Wed Apr 02, 2008 11:29 am
by jackssmirkingrevenge
e1337 wrote:Can a marine grade epoxy hold up to 1000psi?
If it's thick enough, sure.
Also can it hold up to liquid CO<sub>2</sub>?
In terms of pressure, yes, but I'm not sure how it would be affected by temperature.
And is it possible to turn on a lathe?
Once fully cured, certainly.
Posted: Wed Apr 02, 2008 12:02 pm
by ALIHISGREAT
i'm thinking a 1000psi piston cannon made entirely from reinforced marine grade epoxy
Posted: Wed Apr 02, 2008 2:49 pm
by psycix
Wouldnt it be wiser to take a piston made of alluminium in that case?
That one wont break.
Posted: Wed Apr 02, 2008 3:25 pm
by e1337
i'm thinking a 1000psi piston cannon made entirely from reinforced marine grade epoxy
I making a paintball gun made of scratch, I'm picking up my lathe this weekend and I ordered pipe off of Mcmasters and my reg/drop forward off of amazon. The gun's design is based on the Nelson pump (google it and it will have an animation). And I was thinking about making the innards (hammer, sear, bolt, valve seat, etc.) out of cast epoxy, also the grip, hopper, pump handle, and the body that goes around the pipe that hold the "stuff" together will be made of either red wood, cedar, or balsa with a shiny finish.
-e1337
http://www.stockclasspaintball.com/imag ... Nelson.gif
Posted: Wed Apr 02, 2008 3:31 pm
by ALIHISGREAT
could be easier to machine it out of metal..... but i'm not sure, sounds like a cool project though.
Alasdair.
Posted: Wed Apr 02, 2008 4:26 pm
by jackssmirkingrevenge
hammer, sear, bolt
All things best made out of metal as it's more resistant to impacts and general wear and tear.
Posted: Wed Apr 02, 2008 4:30 pm
by Gippeto
Do you really want to do this?
Do you have the tensile strength of the epoxy? You will need this to calculate the thickness of pressure bearing parts and for the strength of any threaded parts as well.
Then consider, have you mixed the epoxy PERFECTLY? Has it cured under ideal conditions? Any deviation will render your calculations useless.
Epoxy is generally used to hold the stress bearing members (glass or carbon fibers) in place, not to carry loads.
If you have some way of SAFELY proving the pieces, then go for it.
Otherwise, you are making a potentially fatal mistake.
