I tried to cast aluminum last week
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I tried to cast aluminum last week
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
http://www.youtube.com/watch?v=RxDDQwhhoU4
Re: I tried to cast aluminum last week
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.
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.
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Re: I tried to cast aluminum last week
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.
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.
metiz wrote: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.
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Re: I tried to cast aluminum last week
Be carefulJohansson wrote: 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
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.“
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Re: I tried to cast aluminum last week
Not bad for a frying pan!hinote wrote: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.“
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.
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Re: I tried to cast aluminum last week
Bet you wish you hadn't flattened that big pulsejet now, eh? Heat and vibration, all in one convenient & efficient package :)Johansson wrote:…make a more serious attempt later with an oil burning forge…
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Re: I tried to cast aluminum last week
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...tufty wrote:Bet you wish you hadn't flattened that big pulsejet now, eh? Heat and vibration, all in one convenient & efficient package
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Re: I tried to cast aluminum last week
The old thread was a re-incarnation of several threads killed before it.tufty wrote:Bet you wish you hadn't flattened that big pulsejet now, eh? Heat and vibration, all in one convenient & efficient packageJohansson wrote:…make a more serious attempt later with an oil burning forge…
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