Remixed Cover Plate(MK4 carriage, V6 Hotend, BLTouch) [original by Maleh3Dprntx]

thingiverse

As per my make, the original cover plate didn't allow sufficient airflow over the heat sink due to high back pressure caused by the original design on my cheap stock fan. I can feel air being pushed out from the intake. To fix this, I simply enlarged the hole in the middle section and it works very well now. My hot end is not suffering from heat creep problems now. Please note that this is the MK4, V6, BL Touch version. 27/05/2020 - Version 2 uses more deliberate lofted cuts for better airflow. The edges of the intake have been increased to a diameter of 38mm for 40mm fans. This significantly reduces backpressure on the top part of the fan. 29/05/2020 - Version 3, my final edit, has an increased outer diameter of 39mm, which is the maximum possible increment without enlarging the overall part. It consists of a full first layer with a 0.2mm height for better bed adhesion with PETG and a higher success rate for printing. V3 also features fillets for better airflow. 29/05/2020 - The fan shroud has been designed to move the fan further, increasing air volume before it compresses into the heat sink area. It's the first part that got better airflow before I amended the cover. Now, it fits over a 40mm fan and pushes it 5mm further out. Definitely improved airflow using this along with the larger cover. 3/06/2020 - The order of the parts has been shifted (v3 is now the first part), and the current photo of the print head with hot end sock and BLTouch has been uploaded. YES, I can finally use the hot end sock without heat creep again! The only downside is that it's harder to get the first few layers right when printing on clean ultrabase due to small infills required on PETG. I tested airflow using a thin piece of receipt paper. The amount of back-pressure has significantly reduced such that about 95% of the intake area "sucks in" the paper. Credits to Maleh3Dprntx for the awesome design!