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How can I release CYANOACRYLATE (instant glue), heat maybe?

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John Hill:
I am considering machining  plates by bonding them to a holding piece with instant glue the theory being that moderate heat will release  them?

These are the side frames for my little nutating engine which really need to be nicely cleaned up more than I could easily do with abrasives etc.

sbwhart:
Hi John

Yes heat will release supper glue (can't spell cyanoacrylate)  I've used this method myself for holding thing whilst machining the biggest problem with it is that its a bit brittle and the bond can crack so you have to take really small cuts and feeds, if you can get hold of some two sided sticky tape that may work better, or try using a combination of glue and some form of mechanical fixing.

Old clockmakers use to use a thing they called a shellack chuck similar idea to using glue.

Hope this helps

Stew

bogstandard:
John,

If you look at it technically, ali is a very difficult material to 'stick' together. It forms it's own oxide coating in a matter of seconds after the original oxide layer is penetrated, it is for that reason it has fairly good corrosion resistance.

What's all this crap got to do with it sticking together?

Unless you coat the whole joint surface with superglue, the joint will most probably be very weak and won't last that long. The oxide layer that the glue is stuck to will just break away from the surface and a new oxide layer will be formed on the surface. Resulting in a very weak bond.

Stew has the right idea, and the one I use most of the time. Using double sided tape over both full surfaces will give a longer lasting and stronger bond. But don't use it if you are going to do any thru drilling, as the joint will most probably fail as you penetrate from one plate to the next.

John

John Rudd:
To answer the orig question...Acetone will dissolve a joint made with CA..

Mr blindbird:
Acetone? Ok good,i been wondering a few times as well what was needed...ever since i glued my indexfinger and thumb together when i wanted to prove superglue wasn that fast...but it was  :bang:

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