Wanhao Duplicator 4X - Top cover plate for MK9 extruder

thingiverse

This week, I upgraded the MK8 extruder in my Wanhao Duplicator 4X to the MK9 version with a kit purchased from ultimate3dprintingstore.com. Unfortunately, when I tried to put the top cover plate on, it didn't fit anymore! The new extruder has a "bulge" at the top that doesn't allow the original plate to attach properly, resulting in a loose piece that might fall down during printing. The piece, sold separately, costs $15 for the plastic version and $30 for the aluminum one. So, I decided to search on Thingiverse and although I found a lot of innovative designs, none of them could fit in my 3D printer: The holes for the screws and filament guides didn't line up properly or the size was too big. In the end, I decided to make my own and I'm sharing it in the hopes that it might help someone in a similar situation. If you need this part for a quick replacement, use the following settings: ABS, 10% infill; No raft, no supports; Bed temperature: 110°C; 5 solid top layers; 2 outer shells; And it should print in an hour or less with enough strength to be reliable. If you want to use it as a permanent part of your printer, increase the infill to 20% and the solid layers to 10, both on the top and the bottom.