Release agent?

[jgh4445]

A friend made me a couple of ingot molds for my WW alloy out of a type of old square tubing material. They turned out about 2 feet long by 2 inches wide by 1 inch deep. He used a grinder to smooth out some areas and the grinder left the usual rough spots on an otherwise, pretty smooth surface. Other than the old "smoke it with a candle" deal, what other type release aids could I use to insure I don't permanantly fill one of these home made molds?

[dubber123]

If they are truly square sided, it may be hard to get them to release no matter what, as all ingot moulds are tapered, being bigger at the top. I wouldn't fill both until you see it they will release at all. I believe Midway sells a spray product called drop out that might help.

[jgh4445]

Thanks guys. Hadn't considered any of that. Looks like a change to angle is called for.

[Calamity Jake]

Just drive a wedge of some kind between the walls to spread them open a little, 1°-2° on one side or both is all that is needed to get the ingots to fall out.
Be sure the welded ends ard angled out at the top also
Use a hand grinder to bevel the top edges a little will help.

[trooperdan]

Huh, I would have cast them full and then been here with a silly look on my face, asking how to undo what I have did! Someone is smarter than I, asking first!

[azcoyhunter]

I would think a little Rust would help to.

I know it helps mine

Clint

[jgh4445]

....and just how do you reckon I learned to ask first?

[birddog1520]

Cool,

I'm very new to casting my own and I'll have to remember that one.

Randy,The Birddog.

[RU shooter]

Back to the original release agent question just set them out in the back yard for a week or two and let them get some surface rust on them.

[runfiverun]

rust is a very good release agent
just not on your boolit moulds

runfiverun