Genius in its simplicity.
http://deltaprinter.co.za/hotend/water-cooled-hotend.html
nice heat sink. teeheehee it might work. hopefully
My issue is the soldering. My solder melts at 235.
Use silver solder, soldering temp at 690 degrees celsius:
They are already using a 56% silver solder. Unless that heavily creeps, I wouldn’t worry about it too much.
@NathanielStenzel Water is very effective with a high heat carrying capacity to remove the heat above the heat break - no pumping required. Copper and silver both have about twice the thermal conductivity compared to aluminium to transfer heat from the heater element and no other metal better than stainless steel for the thermal break. I tried glass as a thermal break but could not get it working - to brittle and easily broken - the hotend is working great with both ABS and PLA.
@Herman_Steyn …do you mean that this is the entire radiator as well? No tubes carrying water from heat sink to external radiator?
Plastic tubes to a small tank outside the printing chamber - no radiator needed - as long as there are no air trapped in the pipes it will circulate water by convection. With long prints 6-7 hours you may feel the difference in temperature between the pipes at the tank 800 mm away. For short prints the difference in temperature between the two pipes only noticeable within 200 mm from the hotend.