Reusable Facemask (AG3D Montana Mask MOD)
Description
This is a modified facemask that is meant to be used for long durations (like an 8 hour shift. We have elongated the original mask to provide more room inside the mask. The flanged insert to install the feature is the same as the original file. We used a 0.35mm layer height with a 0.40mm nozzle. Final print time was just under 4 hours. TPU printing speed was turned down to 30-40% immediately following filament change. If you're interested in printing out a filter cut guide (as shown above in orange), the file is available here: (https://www.thingiverse.com/thing:4440660) We originally started 3D printing these in solid PETG material, but quickly realized that people were using cloth masks because they were just easier to wear long term. So we decided to work on a multi-material option that would provide comfort and still pass the leak test. We decided to print using both PETG for the filter area, and then TPU for the rest. The semi-flexible material provided a more comfortable fit and performed much better than the rigid mask for leak testing. We printed this on the Prusa i3 MK3, so having a direct drive extruder is crucial or it will be more difficult to do (i.e. bowden system). Since PETG and TPU extrude at pretty much the same temperature (we used 240*C), it was easy enough to add a material change Gcode in at layer 100. The trick is getting the TPU to extrude enough remaining PETG during filament change, because otherwise you might jam the TPU filament. We saw that using a higher speed to start filament loading worked better than slowly loading, as the filament would start to bend and wrap around the knurled gear. It's a bit of an experiement but comes out REALLY well if you get it down.
Statistics
Likes
6
Downloads
0