Originally shared by Joe Spanier
All metal hotend I am working on. Going to try printing with it this weekend. All stainless barrel and nozzle aluminum heater block and heat sink.
you need fan for cooling.
Total cooling space should be more than 10 000mm2 + small fan.
Im Planning to add a duct and a 40x40 fan from the carriage. @Pawel_Dobrowolski where did that number come from? I scoured the internet looking for info like that. That seems like a huge amount of area also
Probably don’t want the nozzle to be stainless steel. You want the nozzle to be hot. Did you start with hex stock for that?
I want stainless so I can extrude corrosive materials like solder. This is an experiment anyway so if it fails it’s still science!
Yes I started with hex stock
Just be aware that stainless steel is a pretty damn good insulator, and is going to be very difficult to get up to temp.
Im aware. In Experiments Ive had to run the block to 250c to achieve efficient melting. Which wasnt an issue with the 40w heater core Im using and silicone tape for insulation.
Number comes from experiments and simulations which ware made for me at technical university. Simulations ware implemented in inventor(thermal MES) and than tested with working prototype.
is that 10000^2 mm or 10000^3 because if your saying 10000^2 thats a 100x100mm block of aluminum you would need to carry. How cool did your tests show it got too?
There are many all metal solutions out there with similar designs functioning without issue without carrying the giant block with them.
10 000mm2 of total surface. That is why e3d have such big radiator.
Cold end should be less than 60st C.