I've seen a couple casting setups where a fellow was feeding one pot with another pot in an over/under arrangement to premelt the lead and get it up to temp. I'd like to set up something like this. I'm currently using my lee 4/20 pot that's been heavily modified and it works great, just don't like the temp fluctuations from sprues and ingots. So, I'm considering a second 4/20 pot, or possibly a 10 lb production pot and feeding it from above with my 4/20. I'd be adding a pid to the lower pot if I go this route, so I'd only benefit from it if the valve is a lot superior to the 4/20 (I modified the valve also on the4/20) The other benefit of this system would be a constant level in the casting pot which regulates the flow rate into the mold. This flow rate can vary by quite a lot depending on the lead height in the pot.
does anyone know of any examples of this I can see? A google search didn't turn much up.
My concerns are that the upper pot will splash when it pours into the lower pot.
Im even thinking about float valves like toilets have to auto-feed the lower pot. Crazy?