3D Printed parametric 40mm gaz-mask canister

Cartouche paramétrique de masque à gaz de 40mm imprimé en 3D (version francaise ici)

1 - Design and usage

⚠️ WARNING : Please don't use a 3D printed canister (or even our mask) in life threatening situations ! ⚠️

This filter canister works by holding a filtering material - usully activated charcoal - in between two securelly held mask/filter pieces.

The center sleeve is made to hold both the mask/filter pieces, using the pressure of the two outer shell part being screwed in together around the sleeve.

This repository also provides a plug to use instead of a canister for masks that have two threads for canister - like the one we provide at distorsion/3D-printed-parametric-gaz-mask - which you can print from the 3Dfiles/nato_thread_plug.stl file.

2 - Assembly

Once you have printed all the requiered pieces as described in the 3D printing section, the assembly is simply done in three steps :

Coming soon !

Coming soon !

Coming soon !

3 - 3D printing

To assemble a full canister, you need to need to print :

• 1 sleeve from 3Dfiles/canister_sleeve.stl
• 1 cap from 3Dfiles/canister_cap.stl
• 1 main body from 3Dfiles/canister_main_body.stl

You can also print a plug to use instead of a canister for masks that have two threads for canister - like the one we provide at distorsion/3D-printed-parametric-gaz-mask - which you can print from the 3Dfiles/nato_thread_plug.stl file.

There is no particular printing parameters or material requierments to make this canister properly work. Note that every file provided can be printed without support :

• print the plug (3Dfiles/nato_thread_plug.stl) with the flat face facing down.
• print the sleeve with one of the open end pointing down.
• print the cap with the flat face pointing down.
• print the main body with the 40mm thread pointing down, you can add a skirt to support it better if you fear it falling over mid-print.

4 - Parameters

If you want to changes the parameters of this design, you can edit the Freecad file 3Dfiles/40mm_gaz_mask_canister.FCStd, which is fully parametric, with parameters present in the Spreadsheet.

If you want/need to change parameters, we would suggest you play with them and try to understand the impact of each parameters. We will only explain a small selection of important parameters that you are most likely to have to edit.

We will only describe a few parameters that you are most likely to have to change.

4.a - Structural parameters

wall_thickness : [default=2.7mm] The wall thickness accross the print (except for the strap attachment point). Can be tweeked to make the print either stronger or weaker but lighter and faster to print.

snap_fit_clearance : [default=0.09mm] The clearance between two objects that would fit togeteher with difficulty. Also impact the clearance betwen threads.

4.b - Geometrical parameters

Coming soon !