Activated Charcoal Mask - Version 2

thingiverse

Hey Everyone! I made my revised version a few months ago and have now distributed over 120 masks to my community. In the process of doing so, I discovered some issues with the original design: 1) After upgrading my hot end, I found that my machine had been printing inaccurately, resulting in an interference fit on the threads, which I used to seal between the receptacle and the mask. I've since upgraded the mask design to provide a conical sealing surface for the receptacle portion to butt up against. 2) The receptacle I designed previously was too tall, so I shortened it slightly. I also improved the design of the threads slightly. 3) The clamp piece was way too big and wasted material, so I shortened it. 4) I added a little stiffener to increase the strength of the side flap. With these changes, It winds up using about 12% less material and seals way better. Also, I highly recommend using some weather stripping to improve the fit around the face! Below is a carry-over from the previous design: Hi Everyone! I created a 3-filter replacement for my 3M respirator filters (https://www.thingiverse.com/thing:4247406), and someone asked if I could adapt it into the Nanohack COVID-19 mask, so I remixed the version from Lafactoria3D (https://www.thingiverse.com/thing:4225667). I have printed and tested it. If you've already printed the receptacle, clamp, and grate from my other filter project, no need to recreate them here - they are exactly the same. Just print the mask part and you should be good to go! Filter assembly: To assemble each filter cartridge, follow the pictures above and place a cotton pad at the bottom of a receptacle, then put just a little bit of activated charcoal powder, then another cotton pad, then the grate with the little nub pointing upward, and then thread the clamp on top. Additional note: for better sealing on the threads, I highly recommend either using Teflon tape, caulk, or hot glue to help seal the threaded surfaces. General critique on the basic mask: It's a good design, and needs to be tailored a bit to each person's face to get an adequate seal, which is beyond what I can design with hard plastic. However, this should be solvable by either gooping up some silicone caulk or some cooled-down hot glue (just something that is a little bit squishy). Good Luck and Stay Safe! FaceCoveringChallenge