Had an incident where I obviously have pushed my graphite crucible a bit too much… 23 castings… I think I dumped my quite large sprue buttom down in the crucible a bit to hard when I dumped in the silver and it broke off the buttom. Dident notice before everything was melted. Nevertheless i had to turn it upside down with molten metal, safe to say i had sweaty palms!
However got most of it out, hoever some of the metal i couldent get out… And now cooled down… Seems pretty stuck… The theromostate seem to be working fine… Bit clueless how to proceed…
Brand is Forno Elettrico - Italy! Bought from a Danish Jewelry retailer !
Crucible is from tiger Gmbh
Cant complain on any of the products. Been using them for two years now… Just my own fault i would assume being to rough on the crucible!
Spoke with my retailer, and will drive down with the machine tomorrow to take a look at it together!
However the silver is pretty good melted together with the ceramic inlay material, not sure how i will get it off! And i dont think that i would be a good idea having a puddle of molten silver in my melting oven floating around at the bottom every time i make a melt :3
Might need to order spare parts from italy i assume, however right now the delay in production is just a headache, hehe!
I melt bronze at 1070C and use RioGrande’s 3KG graphite crucible in a custom electric furnace from Mellen. New crucibles weigh about 400 grams. Each of my casting sessions burns off about 10 grams. I discard the crucible when it’s weight is at 250 grams.
I get about 15 uses at the temperatures I use and the 2 hour time duration of my casting sessions. Silver melts at a lower temperature so you might get more use from your crucible.
I once ran a crucible down to 200 grams just to see what would happen. At that point I drilled the walls at the base of the crucible to measure the remaining thickness. It was very thin!
