I wanted something to cool the plastic as it comes out of the nozzle but didn't want it to be bulky since my printers is somewhat small and didn't want to make the usable volume even smaller. So I replaced the stock piece with my own and the stock fan with a 40mm one. Basically it's the stock piece but at the bottom air is directed towards the nozzle.
Note: I have my fan set at 60% for perimeters and 30% for infill at 80% or so, depending on the fan, the hotend can be cooled so much that it won't be able to reach the temperature you want.
Update: Added a second version that should be easier to remove support from, isn't as close to the heater block, has exit slots if the back is blocked, and directs air more towards the nozzle though it will be somewhat harder for air to move through.
I'm designer for shapeways here: https://www.shapeways.com/designer/jonathanmarch/hire-me
| e3d_v6_40mm.stl | 2.8MB | |
| e3d_v6_40mmV2.stl | 3.6MB |
