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Poured Epoxy for complicated gas ports.

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Unread postAuthor: ALIHISGREAT » Fri Jan 04, 2008 6:58 am

jackssmirkingrevenge wrote:nothing wrong with being careful ;)


well i can see this is going nowhere and we will never agree :roll:

and now for some slightly more on topic discussion, would you be able to reinforce epoxy pycrete style and would it make a big difference to strength?
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Unread postAuthor: SPG » Fri Jan 04, 2008 6:58 am

us sniper wrote:Why did you put the magazine in the valve? Why not just do it like the gun JSR just made. That would make it much less complicated to build .


Cos his didn't work? :wink:

Although actually it's to try something different.
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Unread postAuthor: jackssmirkingrevenge » Fri Jan 04, 2008 7:40 am

ALIHISGREAT wrote:would you be able to reinforce epoxy pycrete style and would it make a big difference to strength?


I have done this in the past by mixing wood shavings or similar filler in with the epoxy, it tends to reduce strength but if you're using it as a filler as in SPG's case you can save on a bit of epoxy.

Cos his didn't work?


Well, in the light of recent ideas and developments, perhaps it would have worked if it looked something like this?
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Unread postAuthor: ALIHISGREAT » Fri Jan 04, 2008 7:48 am

I have done this in the past by mixing wood shavings or similar filler in with the epoxy, it tends to reduce strength but if you're using it as a filler as in SPG's case you can save on a bit of epoxy.


reduces strength? thats wierd :? i wonder why?
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Unread postAuthor: jackssmirkingrevenge » Fri Jan 04, 2008 7:49 am

It depends what tyou're using as a filler, if you use steel mesh for example then the result is stronger
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Unread postAuthor: ALIHISGREAT » Fri Jan 04, 2008 7:52 am

jackssmirkingrevenge wrote:It depends what tyou're using as a filler, if you use steel mesh for example then the result is stronger


i was planning on using something fiberous although steel mesh is a good idea...
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Unread postAuthor: Hotwired » Fri Jan 04, 2008 8:38 am

It needs to be a material that is fibrous and tougher than the matrix you're putting it in.

Small flakes don't work. Pykrete is a special case.

If you mixed epoxy with steel wool you'd have a godawfully tough substance.
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Unread postAuthor: ALIHISGREAT » Fri Jan 04, 2008 9:05 am

If you mixed epoxy with steel wool you'd have a godawfully tough substance.


thats one of the things i was thning abot using, do you think epoxy combined with something like steel wool or mesh would make a strong enough piston for use i a qev at 400psi or will there be a risk of chipping or cracking?
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Unread postAuthor: jackssmirkingrevenge » Fri Jan 04, 2008 9:18 am

assuming it has a rubber bumper it should hold up, how thick would it be though?
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Unread postAuthor: POLAND_SPUD » Fri Jan 04, 2008 10:43 am

ALIHISGREAT so you are actually building this....? plizz post your results as soon as it's ready...

wouldn't a solid disc made from rubber work better? you could add something to make it more stiff, like glueing it with a smaller steel disc... but it would be better if JSR commented on this...
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Unread postAuthor: ALIHISGREAT » Fri Jan 04, 2008 8:10 pm

POLAND_SPUD wrote:ALIHISGREAT so you are actually building this....? plizz post your results as soon as it's ready...

wouldn't a solid disc made from rubber work better? you could add something to make it more stiff, like glueing it with a smaller steel disc... but it would be better if JSR commented on this...


well i'm not making "this" i'm thinking about modding a qev for higher pressures and i kind of highjacked the topic :oops: and for that a solid rubber disc would work very well (thats why they already have them in :) ) but it would be hard making a perfect disc :( so i am exploring other ideas like an epoxy piston which would need reinforcement or a plastic piston (teflon maybe) cut from a rod (which would solve the 'perfect disc' problem) but there are many things i need to think about first like the thickness of the piston already in the qev and if its worth increasing the thickness for use with higher pressures etc. maybe i will open up my qev tomorow and have a look :) but as i do not want to invade SPG's thread any longer if you wish to discuss this more can you please post in my '400psi ultra valve' thread

http://www.spudfiles.com/forums/400psi-ultra-valve-t12445,start,15.html
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Unread postAuthor: TwitchTheAussie » Fri Jan 04, 2008 11:36 pm

jackssmirkingrevenge wrote:I don't really have any secrets here, forums are for sharing :)


I do believe so far Ive uncovered two illegitimate children. And not knowing where ya live. Thats a bit weird :?
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