Thingiverse
Hard Shell Filter Mask by ksihota
by Thingiverse
Last crawled date: 5 years, 1 month ago
Note: this is a dust filter mask. Masks are not useful for the general public to use as a way of stopping viruses. Proper medical masks should be used by medical staff. This mask does not filter anything on its own. You must supply your own filter material for your intended purposes.
Updates
Summary
I had previously made a mask printed in TPU that could be printed flat and snapped together.https://www.thingiverse.com/thing:4224005
I decided that some users may not be able to print TPU on their printers so I designed a new Hard Shell mask that can be printed in PLA.
It is designed to require no supports and is thin and light.
It has a couple of different filter cartridges that can be used depending on the material you have available for filters. These are the same as the ones for the TPU mask I made.
There is no valve in this model as it only has a single Inlet/outlet port. If needed it could be redesigned to include two ports and valves.
The shell can be adjusted to individual faces by placing it in hot water and then carefully adjusting the shape (nose area.)
I just ran the upper nose piece under the hot water tap till it softened slightly and bent the area I needed to reshape it to fit the bridge of my nose.
Foam or other padding can also be applied to the inner edges but that would make it harder to keep clean.
I have included 3 versions of the mask. One has a plain cartridge sleeve and works with cartridges printed in TPU. The 2nd has a threaded cartridge sleeve and will fit threaded cartridges printed in PLA. The thread on this is M40 x 3 which has been adjusted slightly to make it a little easier to fit together. The 3rd has no sleeve and could be used by designing a threaded coupler.
Filter cartridges printed in PLA do not flex well so they do not slide easily over the unthreaded sleeve. If you prefer this method and are printing in PLA you could try to scale the unthreaded cartridge to fit it over the unthreaded sleeve.
I have also included a thin separator that can be used to help hold some filter material in place, if needed.
Please let me know if there are changes needed.
I did try printing this design in TPU but the filament I had would not allow me to print it without any supports. If you have some flexible filament that would hold its shape while printing you may have better success. Of course by printing in TPU the print would also take quite a bit longer than in PLA.
Updates
Summary
I had previously made a mask printed in TPU that could be printed flat and snapped together.https://www.thingiverse.com/thing:4224005
I decided that some users may not be able to print TPU on their printers so I designed a new Hard Shell mask that can be printed in PLA.
It is designed to require no supports and is thin and light.
It has a couple of different filter cartridges that can be used depending on the material you have available for filters. These are the same as the ones for the TPU mask I made.
There is no valve in this model as it only has a single Inlet/outlet port. If needed it could be redesigned to include two ports and valves.
The shell can be adjusted to individual faces by placing it in hot water and then carefully adjusting the shape (nose area.)
I just ran the upper nose piece under the hot water tap till it softened slightly and bent the area I needed to reshape it to fit the bridge of my nose.
Foam or other padding can also be applied to the inner edges but that would make it harder to keep clean.
I have included 3 versions of the mask. One has a plain cartridge sleeve and works with cartridges printed in TPU. The 2nd has a threaded cartridge sleeve and will fit threaded cartridges printed in PLA. The thread on this is M40 x 3 which has been adjusted slightly to make it a little easier to fit together. The 3rd has no sleeve and could be used by designing a threaded coupler.
Filter cartridges printed in PLA do not flex well so they do not slide easily over the unthreaded sleeve. If you prefer this method and are printing in PLA you could try to scale the unthreaded cartridge to fit it over the unthreaded sleeve.
I have also included a thin separator that can be used to help hold some filter material in place, if needed.
Please let me know if there are changes needed.
I did try printing this design in TPU but the filament I had would not allow me to print it without any supports. If you have some flexible filament that would hold its shape while printing you may have better success. Of course by printing in TPU the print would also take quite a bit longer than in PLA.