Montana Mask - Makerspace Live!

Montana Mask - Makerspace Live!


Relevant Links:

Make the Masks for the STL files:
Ultimaker Cura is the Slicing engine I used:

Transcript:


William: "Hello Makers! Today we're going to be 3D printing a filtration mask using a small, budget printer.

For this project we will need elastic bands (though I have string pictured), and we'll need some filtration material like a cutoff from an N-95 respiratior.

We're printing in black and white [Oops, black PLA] on a Monoprice Select Mini.

Be sure to check us out on Facebook and in person when we resume operation!

Today we'll be printing the Montana Mask which can be found at Makethemasks.com.
The Montana Mask is a 3D printed respirator which can be used and is designed to help stretch out the supply of N-95 respirators.
 You can find the files under the "Make the Mask" subsection of that website, under 3D printing files. 
I have them downloaded already right here.

So now that we have the files: the first thing we're going to do is we're going to load up Cura which I have loaded right here and we're going to drag the .stl's into it. 

Now, notice right away that it is too big for my printer as well. However...
I think we can get pretty close (lowers scale to 80%) to full size. I'm going to go ahead and twist it around so that it is laying flat and laying upwards. So that we're not printing a big dome.
That looks pretty good, I might be able to make it a teensy bit bigger but I think on this axis that's as close as we're going to get.
So we're going to go ahead and hit slice after we look at the printing profiles.
We're selecting a thicker layer height (fast mode) with 30% infil.
The support type we're selecting is brim and we should be good to go.

Hit slice! The estimate is 2 hours and 31 minutes which is lower than I would guess will be the real final result.

Lets save the STLs to a place we can find them, like the desktop.
Lets make note of the scale we've chosen, 80%. 

Right click and clear off the built plate. Lets drag the other STL file into Cura and rotate it to make sure its not standing up. Place the thickest parts at the bottom and reduce the scale.
For this print we're going to select raft.
Hit slice and save to the same location.

Once we have our G-Code here we're going to have to send it to the 3D printer. The way I do this at home is through Octoprint which is a Linux distribution that helps people use 3D printers. You'll see here that it lets me do an easy time-lapse and I can use the camera to look at the 3D print as it goes which is nice if I'm in the other room or something. It will also tell me things like the temperature and what its up to and I can look at the G-code as it executes.
You'll notice I'm already printing the mask. And that the stl is stored here.
The printer thinks it will take 8 hours which is probably closer to correct. I'm not sure why the G-code thinks it will take 2 and a half hours but time will tell.
We'll just let it go!

Now that the first print is done, lets print out the filter frame. So lets click on this...
and its already loaded up into the printer. So lets hit print and it will pre-heat everything and give us an estimate of 40 minutes.

The parts are printed out, so now we're going to look at the assembly instructions.
We can scroll down on the same page where we got the .stls for the mask to where the instructions are.
Which I already have open right here!
Really there's just a few instructions: One is to sand the parts of the mask which will touch the face with 200 grit sandpaper and string in elastic bands around the back of the mask through the tabs.
As well as to use a 2.5 sq.in. cutoff from an N-95 respirator.
So lets go do that!

So here we have the bill of materials: we have the elastic band, we have the mask right here, we have the filter flange, and this little piece of paper towel and I have this little stick to help poke the elastic band through the holes. So the first thing we're going to do is we're going to sand all the edges that make contact with the face so that they will be nice and smooth.
Now, anytime you're sanding you should wear a face mask. We're just gonna take the sandpaper here and sand all the edges and take care of these stringy bits in the middle here.

So now we're gonna go wash it in some warm soapy water and let it dry off so that none of this particulate gets into people's noses. 

Now we're going to go ahead and put the filter in. The filter goes like this and we're going to use this with this lip / flange kind of thing on the outside. And we're going to push the filter in until you hear it snap and click into place and you have youuurself a mask with a filter! 
Now a lot of the times people are cutting up the N-95 masks and you can get about 5 of them through one of these, though if you're going to do that you should wash these masks frequently.

Now we're going to finish assembling the mask. I don't have any elastic at some so we're going to use bits of string. On the mask print here there are these little four holes and thats where we're going to put the string through.

So there we go! IT IS ASSEMBLED."

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