Covid Mask with exhale filter

thingiverse

This is my remix of COVID-19 Emergency Mask by Navakasi (https://www.thingiverse.com/thing:4267890) The file names have gotten away from me now, I know they are not quite the best, I promise to go through and rename/clean up this as soon as I can. <h1>Background</h1> One point that many people commented on for his mask was when you exhaled it was just straight going out of the mask with no filtration, which if an asymptomatic person were to use could spread the virus. To solve this, I replaced the unfiltered exhale valve with another threaded hole and created a scaled-down filter canister with a one-way exhale valve. <h1>Filters</h1> The filter canisters can be fitted with any number of filter materials such as cloth or makeup pads, etc... and since there are separate filters for breathing in and out, you should be able to use the same filters longer since you are not getting your inhale filters wet with your breath. <h1>Workaround for those without TPU/Flexible Filament</h1> The PLA plastic is too rigid for the parts that require flexing/sealing. I tried printing them out and using them, but even printing them as thin as I could did not work. Since I also do not have access to TPU, I came up with a workaround. You can use valveTemplate.stl to make your seals and valves out of material that you have on hand. The circle of the template is the same size as the seals so you can trace the template and cut the seal out of anything available. For the seals, I found that tracing the outside of the template on a flexible material creates very good seals. For the exhale filter, the inside of the template provides a great size to use. I have also put a marker in the center of the template so you can mark where to poke a hole in your material so you can insert it on the mask's pegs. <h1>Part List for Printing:</h1> <h3>Required Parts</h3> 1. LargeMask3Screw.stl 2. ScaledDownOutCartridge.stl 3. ScaledDownOutCap.stl 4. ScaledDownGrid.stl <h3>Option 1:</h3> 2. cartridge.STL 2. cap.STL 2. grid.STL <h3>Option 2:</h3> 2. cartridgeNoGrid.stl 2. cap.STL 4. grid.STL <h3>If you only have PLA and will need to make the seals out of cut material:</h3> 1. valveTemplate.stl <h3>If you have access to TPU/Flexible Printing Filament</h3> 3. seal.STL 3. valve.STL 2. brim_L.STL (For better fit, I have noticed that mine works without this though) Alternate to cartridge.STL: A good point was brought up by Vincent_CHASSE that the cartridge could be difficult to print as the original STL file made it almost impossible to use supports. To fix this, I uploaded cartridgeNoGrid.STL which removes the grid pattern attached to the cartridge so you can use supports. You will need to print 2 grid.STL so that you can sandwich your filtering material in between them Combined cap and grid: I uploaded gridCap.stl which combines the normal size grid and cap into one part, just in case you want to cut down on the parts count. It is essentially the one larger version of the cap that is on the exhale filter I am removing the work-in-progress tag as I believe that this mask should be pretty well off now, but I am always looking for feedback and comments and would gladly like to incorporate those in any way that I can to improve the design. <h1>Acknowledgments:</h1> If you like the design please make sure to share praise to the original creator Navakasi (https://www.thingiverse.com/Navakasi/about) as I would have no idea how to make this if I didn't use his mask to edit. Also, a big thank-you to Vincent_CHASSE who has been providing great feedback and ideas for the mask