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This is a cartridge design that fits the Self-Assembly Filtration for Emergencies (S.A.F.E) Cartridge System designed and released by the medical university of South Carolina (MUSC). The license they release it under is VERY restrictive and will not allow me to repost any of the files they designed, so I had to completely design these easier to print parts myself…..but the dimensions and function are compatible so the same assembly process and function is still there. Go here for the mask STL, and original files and instructions on how to make these masks and filters:
https://web.musc.edu/innovation/covid-19-innovation
MUSC did a great job on this design, and the mask designs are awesome as is. but the filter cartridge was not optimized for printing and had lots of overhangs and wasted time with lots of support.
Some of the improvements in my design:
-No large flat overhang on the body, reduces support material considerably, only a line is required
-FDM optimized valve vent hole orientation. no support materiel to remove
-alignment marks so you do not glue the lid on incorrectly
-slide on valve cover, so you can easily remove it to inspect or service the valve, and no support material to remove
-wide foot on body so brim is not required
-optimized thickness in body so up to a 0.8mm nozzle can be used to speed up production.
-created a 3D printable template, so you can easilly cut the rubber needed for the valve with scissors
This article was first featured at https://ift.tt/33Xjzzt on March 30, 2020 at 10:16PM by 1013
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