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 Posted: Wed Dec 2nd, 2020 03:40 am
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William Dunlap
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Joined: Fri Jan 31st, 2014
Location: Kula, Maui, Hawaii USA
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I've noticed some interest here in DIY projects. Highly commendable. I want to do a little brass casting myself here sometime in the near future. I just need something to reproduce that others want at this point.In order to get there, though, I'm going to need more tools. I've thought about the twin turbo torch approach that works, but is a bit dangerous, but recently I've looked into induction metal melting using electricity, specifically automotive batteries or 220v wall curent and a ZVS high frequency induction heating machine. 
Here's an example of one suitable for small parts casting. A graphite or ceraminc crucible sits inside the coils and high frequency voltage causes eddy currents in the target metal heating it to the melting point.


This kit is fully self contained and available on ebay for 140$. I think it comes from China....
Anyway, it's an inexpensive way to get into hobby casting at home. By the way, aluminum melts at such a low temperature that it might be the best way to get started.
Also, I have a lot of scrap brass around here I need to do something with....


Have fun.
Cheers,
Bill


If you want the fundamentals about how this is done, watch Mehdi's video on it. This guy cracks me up....







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 Posted: Wed Dec 2nd, 2020 07:10 am
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Jim Kovar
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Joined: Mon Feb 21st, 2011
Location:  Lincoln, Nebraska USA
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Mehdi is an absolute gas!   :thumbup

Wish I had had instructors
such as him, 30+ years ago!

Solid-State Devices and Circuit
Analysis would have been much
more interesting.   :D

Some of the funniest parts
of his vid only last a fraction
of a second.

I guess only e-dorks like me
would think the below was
funny?   :wondering:

I got a good chuckle from it.  :P


Last edited on Wed Dec 2nd, 2020 07:21 am by Jim Kovar

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 Posted: Wed Dec 2nd, 2020 07:17 am
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Jim Kovar
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Joined: Mon Feb 21st, 2011
Location:  Lincoln, Nebraska USA
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AKA a snubber.

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 Posted: Wed Dec 2nd, 2020 09:35 am
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Jim Kovar
AFCA Member


Joined: Mon Feb 21st, 2011
Location:  Lincoln, Nebraska USA
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Hey, Bill, I find the idea of a small
inductively heated (eddy current)
crucible furnace fascinating.

Here's a crucible furnace that's ready

to plug and play, though not inductive,
the price is very reasonable.



https://m.it.aliexpress.com/item/32554110640.html





Google translate...

Description:

1. 2kg Gold Melting Furnace: Vertical furnace is specially designed and built for melting metal by melting and alloy metal up to 1100OC.

2. 40 minutes for 2kg gold,

3. Overall dimensions :: 20 * 20 * 40mm,

4. Weight: 9kg,

5. Voltage: 220V, 50 / 60HZ.

Features:

1. High purity alumina fiber chamber for energy saving - chamber size: 60mm dia. x 150mm deep.

2. Precise temperature control, easy to read digital display and LED on / off indicator light.

3. Single temperature control point (Temperature only, no control for heeating and cooling and dwell speed).

4. Complete accessories are included for immediate use,

5. One heavy duty graphite crucible with 2KG capacity.


Two Kilograms is 4.4 pounds.

1,100 degrees celsius is
2,012 degrees fahrenheit.






Last edited on Wed Dec 2nd, 2020 10:03 am by Jim Kovar

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