Ender 3 Dragon Hotend Fan Shroud

thingiverse

This is a modification of the stock Ender 3 fan shroud (redrawn from scratch) to fit the Phaetus Dragon Hotend mounted to the stock carriage with a Precise Printer Parts Billet Hotend Mount. It also includes an attachment for a 5015 fan mount, and strain relief for the wire bundle. I wasn't satisfied with any of the available mounts or cooling solutions for use with the dragon, so this is what I developed. Improvements include: 1) Raising of the entire shroud so the cooling air is only blowing on the hotend heatsink, not the nozzle 2) Better sealing of the shroud to the bottom of the heatsink, so air is only blowing on the heatsink 3) Use of a 40x40x20mm fan in place of the stock 40x40x10mm for additional ariflow and quieter cooling options 4) Additional vent slots. Exit area now approximately equals inlet area; for ideal cooling, exit area would be 2x inlet area, but this is tough to achieve in such a confined space. 5) Provision for a 5015 part cooling fan duct. I used the cooling duct from this assembly: https://www.thingiverse.com/thing:2494642 Necessary Parts: 1) Precise Printer Parts Dragon/Mosquito Hotend Mount:https://preciseprinterparts.com/Billet-Hotend-Mount--Mosquito-hotend-to-replace-MK8MK10-hotends_p_12.html 2) 1x stock M3X6mm BHCS, used to attach the stock fan shroud to the hotend carriage 3) 1x M3 X 60mm SHCS, this goes through the fan to attach the shroud to the hotend carriage 4) 1x M3 X 20mm SHCS, for attaching the 5015 fan to the cooling part duct 5) 2x M3 nuts, 1 for attaching the 5015 fan to the cooling part duct, 1 for attaching the cooling part duct to the shroud 6) 1x M3 x 10mm SHCS, for attaching the 5015 duct assembly to the shroud.