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Epoxy question

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: dewey-1 » Wed Mar 31, 2010 2:23 pm

Most household type of "Super Glues" are worse than an epoxy type for the simple reason that moisture will breakdown the bond.

article;
http://www.wisegeek.com/what-is-cyanoacrylate-glue.htm

There are industrial types that use a primer/surface conditioner that help a lot. These activators help the bond become stronger.

See PermaBond here;
http://www.adhesivewarehouse.com/

A proper surface preparation is required for any adhesive to work properly.
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Unread postAuthor: jackssmirkingrevenge » Wed Mar 31, 2010 2:41 pm

I had missed this :roll:

If you rough up the surface properly (use a file to cut a number of grooves), clean the surface well and prepare the epoxy correctly, allowing enough curing time, there is no reason why good epoxy should not hold.
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Unread postAuthor: Demon » Wed Mar 31, 2010 3:12 pm

I will give another go at the epoxy then with proper sanding and all the cleaning ...

I will tell you how it went.
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Unread postAuthor: dewey-1 » Wed Mar 31, 2010 5:00 pm

jackssmirkingrevenge wrote:I had missed this :roll:



Some one has to cover for you when you became blind from excessive hours in that bat cave! :D
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Unread postAuthor: Coodude26 » Wed Mar 31, 2010 10:34 pm

Demon wrote:I maybe found something ...

I could try to make grooves on the 4 aluminium surfaces wich are in contact and fill those grooves with epoxy.



Good idea, that would give it much better mechanical strength. Also go to a hardware store and get some new epoxy...make sure the packaging specifically says it works on epoxy, don't worry you'll find some.
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Unread postAuthor: jackssmirkingrevenge » Thu Apr 01, 2010 5:21 am

dewey-1 wrote:Some one has to cover for you when you became blind from excessive hours in that bat cave! :D


I'm actually away from the cave at the moment, on "Operation Barbarossa" ;)

За Родину!


:D :D :D
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Unread postAuthor: Gun Freak » Sat Apr 03, 2010 5:10 pm

I have a question about epoxy, I just didn't want to start a new thread with the exact same title. :D
Do epoxy pistons dry hard or somewhat squishy?
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Unread postAuthor: dewey-1 » Sat Apr 03, 2010 6:39 pm

Have you ever tried a google search?
Learn to use it and you may be amazed what you can learn!



http://en.wikipedia.org/wiki/Epoxy
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Unread postAuthor: Gun Freak » Sat Apr 03, 2010 7:52 pm

Jesus chill out I just had a simple question!
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Unread postAuthor: Hawkeye » Sat Apr 03, 2010 8:53 pm

Simple questions are the questions that are answered with little effort by a search.
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Unread postAuthor: Gun Freak » Sat Apr 03, 2010 9:53 pm

By the time you said all those negative comments, you could have answered my dang question a hundred times.
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Unread postAuthor: hi » Sat Apr 03, 2010 10:00 pm

why not solder it?
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Unread postAuthor: Hawkeye » Sat Apr 03, 2010 11:05 pm

It's Aluminum....
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Unread postAuthor: ramses » Sun Apr 04, 2010 9:45 am

hi wrote:why not solder it?


I was thinking the same thing. Aluminum can be soldered, but you need special flux and, IIRC, solder
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Unread postAuthor: Demon » Sun Apr 04, 2010 5:16 pm

I dont have anything to solder ( well my grandpa as a complete oxy-acetylen torch kit with regulators but i dont know how to use it )

I will make two hole beneath the part that failed, put a cylindrical piece of metal and adjust the height with metal shims. ( its simple and adjustable )
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