Prusa MK3S extended fan shroud

thingiverse

This is Prusa MK3S little modified fan shroud. I had problem with cooling on the back of object. Symmetrical object - front overhang printed OK but back was melted. So, took original Prusa fan shroud, cut it half, extended sides, added some small plates to guide airflow away from nozzle itself and made it solid again. To compare just load it together with original to your slicer. Result was better on the same print, but only marginally. Seems there are needed some modelling tools to make it work better, I do not have... UPDATE V2 14.04.2019 Did think about cooling one more time. Prusa stock seems to be optimized for max airflow. On the other hand, cooling of certain place should be result of air speed on that specific place. It is not the same, as general max airflow around nozzle. So made V2, where openings are little more restricted with additional plates. This should increase the pressure and airspeed around nozzle. Did test and seems marginally better again. So V2 is with smaller openings, restricted more on bottom of the shroud. This results little silenced vent also.