This is my setup that I did in creative. I just recently started playing gregtech 6 so I’m a noob at the mod but anyway. This design is very cheap, only requiring one sensor. It currently makes bronze, but can probably do any alloy. If the temperature reaches more than 1357 K it will cast the bronze to the 4 molds it has and activates the droppers which will shoot 3 ingots of copper and one ingot of tin into the crucible cooling it down to about 400 K.
It also has some problems. Firstly it doesn’t shutdown automatically and that’s what the lever on the side is for which blocks the burning box and also disables the droppers, but it doesn’t work all that well. And secondly when the droppers are empty the crucible will melt down but that can be easily fixed with some comparators.
Edit: In the pictures I used a bronze burning box which is slow af, but because of the four molds a tungsten burning box also worked, anything higher tier than that and the metal wasn’t cooling down fast enough. Also the back dropper was only activated by quasi-connectivity which made it dispense a second later than the others for some reason. Just replace the brick block on top of it with a redstone dust.
Edit 2: So I redesigned it a little. It’s more bulky than the previous design, but it automatically shuts off when one of the droppers gets empty. The ladder is there to stop items from getting stuck on the sensor.
