I tried to cast aluminum last week

[Johansson]

I did an attempt to cast an aluminum block for my soon-to-be TV94 gas turbine, it was great fun even though the cast part came out less than perfect.

http://www.youtube.com/watch?v=RxDDQwhhoU4

[metiz]

Holy aluminium casting, batman!

Try a vibrating surface plate to get rid of any airbubbles when casting. Also try preheating whatever you're casting in (is that a pie shape? ) so the aluminium solidifies more evenly.

[Johansson]

Yup, a pie shape indeed. It will never be its old self again...

Besides the things you´ve pointed out I should have guessed that the teflon coating in the pie shape would burn and cause cavities, but it was only a primary test and did indeed inspire us to make a more serious attempt later with an oil burning forge and better quality aluminum.

Holy aluminium casting, batman!

Try a vibrating surface plate to get rid of any airbubbles when casting. Also try preheating whatever you're casting in (is that a pie shape? ) so the aluminium solidifies more evenly.

[hinote]

Besides the things you´ve pointed out I should have guessed that the teflon coating in the pie shape would burn and cause cavities, but it was only a primary test and did indeed inspire us to make a more serious attempt later with an oil burning forge and better quality aluminum

Be careful

At 680°F Teflon pans release at least six toxic gases, including two carcinogens, two global pollutants, and MFA, a chemical lethal to humans at low doses. At temperatures that DuPont scientists claim are reached on stovetop drip pans (1000°F), non-stick coatings break down to a chemical warfare agent known as PFIB, and a chemical analog of the WWII nerve gas phosgene.“

[Johansson]

Be careful

At 680°F Teflon pans release at least six toxic gases, including two carcinogens, two global pollutants, and MFA, a chemical lethal to humans at low doses. At temperatures that DuPont scientists claim are reached on stovetop drip pans (1000°F), non-stick coatings break down to a chemical warfare agent known as PFIB, and a chemical analog of the WWII nerve gas phosgene.“

Not bad for a frying pan!

Fortunately we were doing the casting outside on a windy day so we were more likely to suffocate from the nearby cows farting than from the teflon gasses.

[tufty]

…make a more serious attempt later with an oil burning forge…

Bet you wish you hadn't flattened that big pulsejet now, eh? Heat and vibration, all in one convenient & efficient package :)

[metiz]

Rofl you read my mind

[Johansson]

Bet you wish you hadn't flattened that big pulsejet now, eh? Heat and vibration, all in one convenient & efficient package

If it actually ran it would have been the best heater ever, but at the time when I crunched it it wasn´t even capable of toasting bread...

[teresap989]

…make a more serious attempt later with an oil burning forge…

Bet you wish you hadn't flattened that big pulsejet now, eh? Heat and vibration, all in one convenient & efficient package

The old thread was a re-incarnation of several threads killed before it.



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