@3D Universe, thanks for the video. Are you concerned that the seal between the plastic frame filter insert, filter material, and mask can be compromised by the bunching up of the filter material, particularly in the corners?
This is awesome. I designed one as well based off of the Montana mask and the popular covid19 3 part mask on thingiverse. I redesigned the front to be less boxy, have the front faceplate as part of the mask rather than seperate. I also added a 10mm hole in the front to allow a pen or pencil to push the filter grid out. Makes replacing the filter easier. I also scaled the body a little so that it doesnt push on the nose so much. I then used 100% silicone caulk to make a bead around the edge for comfort and to seal the mask better. Printed tons of them
Awesome ! I've heard that we also need to protect our eyes and ears. That the virus can still get in through the eyes and ears. My questions are: What is the size of the virus and what is the size of the filter perforations? (Obviously the perforations "holes" have to be smaller than the virus)
Hello, I just used your model using my CR10-S printer using TPU filament. During the final 25% I experienced a shift in the model. If anyone have any specific setting for the CR-10S using TPU for printing this model. Although the print failed, I believe this was a well designed mask. Any information would be a great help.
Have you considered printing these using polypropylene (like the filter material)? It's reasonably flexible, has good chemical resistance, and the whole mask could likely be autoclaved or sterilized with EtO.
Awesome work. been following you for a while in regards to this mask and have made many of them in different styles. They keep getting better. My only suggestion would be to make the strap holes a little larger so that the mask can accommodate many different types of straps. I use shoe strings right now because it's been hard to find anything else right now and believe or not it's pretty hard to get the shoe strings through the current holes. Keep up the great work. Looking forward to future versions. ;)
Any thought regarding C02 poisoning? We are researching masks and found our 3M respirators have a release valve to allow for the expelling of dangerous C02. The warning seemed rather serious if this valve was to be impeded. Thoughts?
For the filters we're using (the MERV-15 bag filters from McMaster), we cut the bags open so it's a large flat sheet of filter material. So the square piece of filter material ends up being a single layer. We're still testing to see whether it might be best to use two layers of this filter material. We'll update the documentation with our findings soon.
I have a teenage daughter who's face size is smaller than the smallest XS sized mask. Is it OK to scale the design down to fit her face (bridge of nose to chin of about 97 mm)? Any recommendations on how best to do this, or should I just uniformly scale the XS design down along all 3 axes? Will there be any problem with the mask being too shallow to fit her face if I scale uniformly? Thanks for the excellent work on this!!
Could you please provide the height / width / length measurements in millimeters of the mask parts in the various sizes in the Design Documentation in Google Docs? Only the Length is currently listed in the Document. I want to get some of these done by a local 3d Printer (as I do not have a 3d Printer myself), and they require the aforementioned measurements, when submitting an order. Also, as to Material types, I assume that I would check the "Plastic" box on the Order Form -- the selections are Acrylic, Composite, Metal, Plastic, Precious Metal, Other -- and then in either the "Details" or "Notes" section on the Order Form, specify TPU as the desired construction material ... Does this sound correct? Thanks so much for all of the hard work of you and your team! I'd also come to the conclusion, after researching, that the Montana Mask seemed the most promising design. However, I had seen User/Maker comments describing drawbacks to it, and having no experience in modifying CAD files, I didn't know how I could correct them. I was very happy to have found your modified design, which corrected all of the noted shortcomings!! Keep up the great work!!!
OK, full dimensions for all sizes have been added to the Google Doc. Yes, you would want to request to have these printed in TPU for the mask body and PLA for the filter frame component. Depending on the 3D printing service you're using, they may or may not have the ability to print TPU. Good luck!
I also forgot to ask ... With regard to the Bag Air Filters that you are using from McMaster-Carr, any of the MERV 15 would be appropriate, right? In your answer to a question below, regarding the bags themselves, you stated that "[you] cut the bags open so it's a large flat sheet of filter material. So the square piece of filter material ends up being a single layer." Is there any special method to the cutting of the bags, so that one ends up with one large piece? It sounds like each bag has more than one layer to it ... Is there any material (charcoal, fiber, etc.) in between the layers? Does it matter which side of the squares cut from the bags is facing out from the mask and facing in toward the mask wearer? Do the square pieces cut need to be cleaned in any way, before placing them into the mask? I realize that one gets many filters from the bags, but if necessary would it be advisable to sanitize them (e.g., with hydrogen peroxide) for reuse? Finally, in the Design Documentation, you indicate that the cut filter size is 2.5 inches square ... Does that measurement fit all the Filter Frame sizes XS to XL?
As far as we're aware, any MERV-15 filter would be okay, but the specific part number referenced in our documentation is the only one we've tested. In terms of cutting the bags open. There's a seam that goes around the outer edges that needs to be cut. There are also strips of material running vertically down the length of the filter every few inches to connect the two sides together. Those strips can be pulled off carefully. Then you should be left with one large sheet of filter material. As far as we're aware, there is no material between the filter layers. It appears to be the same material all the way through. The same 2.5 inch square size should work for all mask sizes. There will just be a little extra margin around the edges for the smaller size masks, which is okay.
@@3duniverseOrgWelcomesYou Thanks for the information, regarding cutting the bags and the cut size for the filter! As to the MERV-15 Air Bag Filter mentioned in the Design Documentation, there is only a link provided to a McMaster-Carr Bag Air Filters page, which has listings for MERV 10, 12 & 15 Bags, in a variety of sizes (with different part numbers) for each. I assume that any of the MERV-15 Air Bag Filters listed on that page will suffice. (The Gasket, which also has a link to a McMaster-Carr website, does open to the page of a specific part number 4869A68.)
couldn't you make it just 1 filter size in a effort to get manufacturers to make and sell the best ONE filter that would be more compliant with the CDC. It is cheaper to tool up to make 1 filter then 5 sizes. yes i know that if i am making them it doesn't matter.
We explored that option, but with the current design, we would have to standardize on the smallest size in order to make the filter size the same for all 5 sizes. The result is a 23% reduction in the filter surface area at the large size. We are working on alternate approaches that would allow for standardized filter sizes and even the ability to attach standard filter cartridges, but that will come in a future version of the design.
@@3duniverseOrgWelcomesYou Also we are not in normal times , as having a list of filters to harvest raw materials allows for more supply, aka what is on stock now / in county vs slow boat to china etc. Keep in mind these filters may be used in infrastructure 🏥 as their intended purpose aka building filter . We are living in times of scarcity, try to get the copper filament .
My wife works for a doctor and he found out I had a 3d printer, he has offered to buy me a new printer up to $600 so I can print masks for some of his patients. Any printer recommendations? Thank you.
Yes, thermoforming is recommended if you decide to print the mask in PLA. Our testing shows that it doesn't provide a good enough seal on the face without that.
That seems like it might reduce the protection the mask provides to others. One of the best things mask wearing can do is reduce transmission in both directions, so it seems you would want both inhalation and exhalation to pass through the filter.
Hi, thanks for improving the design. I was wondering if it could be possible for you to share all the parameter to print with an ultimaker S5 and TPU material (maybe a screenshot of each section). I have one at work. I am quite novice in printing with this model and do not want to make any mistake. Thanks for your answer
@@3duniverseOrgWelcomesYou Hi Thanks for the answer. I have print some with the MDflex TPU materials but I can see some "stringing-effect" any idea on how I could improve the printing quality. Thanks for the input
@@pepanouillot4634 That depends a lot on the printer and the material being used. A lower temperature might help. You could also try increasing the retraction distance and retraction speed a bit. Even if there is some stringing, that's pretty easy to clean up. Just use a sharp blade to trim away most of the strings, then use a heat gun to melt away any remaining strings.
@@kimballwiggins3976 It should take no more than 5 hours to print, so you may want to have another look at your settings. Try using 0.32mm layer height with 2 shells and 15% infill. That should get you to around 5 hours or a little less.
@@3duniverseOrgWelcomesYou What is your recommendation with a 0.8mm nozzle? I just purchased TPU filament and would like to print as many as I can at once. I have the Merv 16 filter just waiting to be used. Did you find out if one layer or 2 layers would suffice? Thanks in advance.
@3D Universe, thanks for the video. Are you concerned that the seal between the plastic frame filter insert, filter material, and mask can be compromised by the bunching up of the filter material, particularly in the corners?
This is awesome. I designed one as well based off of the Montana mask and the popular covid19 3 part mask on thingiverse. I redesigned the front to be less boxy, have the front faceplate as part of the mask rather than seperate. I also added a 10mm hole in the front to allow a pen or pencil to push the filter grid out. Makes replacing the filter easier. I also scaled the body a little so that it doesnt push on the nose so much. I then used 100% silicone caulk to make a bead around the edge for comfort and to seal the mask better. Printed tons of them
Awesome ! I've heard that we also need to protect our eyes and ears. That the virus can still get in through the eyes and ears. My questions are: What is the size of the virus and what is the size of the filter perforations? (Obviously the perforations "holes" have to be smaller than the virus)
Hello,
I just used your model using my CR10-S printer using TPU filament.
During the final 25% I experienced a shift in the model.
If anyone have any specific setting for the CR-10S using TPU for printing this model.
Although the print failed, I believe this was a well designed mask.
Any information would be a great help.
Have you considered printing these using polypropylene (like the filter material)? It's reasonably flexible, has good chemical resistance, and the whole mask could likely be autoclaved or sterilized with EtO.
I don't have a 3D printer. Where can I buy some of these for family members?
Awesome work. been following you for a while in regards to this mask and have made many of them in different styles. They keep getting better. My only suggestion would be to make the strap holes a little larger so that the mask can accommodate many different types of straps. I use shoe strings right now because it's been hard to find anything else right now and believe or not it's pretty hard to get the shoe strings through the current holes. Keep up the great work. Looking forward to future versions. ;)
Can you make a version available with a 4.5" filter? these 2.5" masks are difficult to breathe in.
Any thought regarding C02 poisoning? We are researching masks and found our 3M respirators have a release valve to allow for the expelling of dangerous C02. The warning seemed rather serious if this valve was to be impeded. Thoughts?
Testing is still in progress, but so far, the test results have shown no significant build-up of CO2 in the mask
Do you use all layers of the filter?
For the filters we're using (the MERV-15 bag filters from McMaster), we cut the bags open so it's a large flat sheet of filter material. So the square piece of filter material ends up being a single layer. We're still testing to see whether it might be best to use two layers of this filter material. We'll update the documentation with our findings soon.
How often should the filter be changed?
I have a teenage daughter who's face size is smaller than the smallest XS sized mask. Is it OK to scale the design down to fit her face (bridge of nose to chin of about 97 mm)? Any recommendations on how best to do this, or should I just uniformly scale the XS design down along all 3 axes? Will there be any problem with the mask being too shallow to fit her face if I scale uniformly? Thanks for the excellent work on this!!
Yes, you can scale it down as needed. Just be sure to scale the mask and the filter frame by the same amount.
Thank you for this! From an RN.
Could you please provide the height / width / length measurements in millimeters of the mask parts in the various sizes in the Design Documentation in Google Docs? Only the Length is currently listed in the Document. I want to get some of these done by a local 3d Printer (as I do not have a 3d Printer myself), and they require the aforementioned measurements, when submitting an order. Also, as to Material types, I assume that I would check the "Plastic" box on the Order Form -- the selections are Acrylic, Composite, Metal, Plastic, Precious Metal, Other -- and then in either the "Details" or "Notes" section on the Order Form, specify TPU as the desired construction material ... Does this sound correct?
Thanks so much for all of the hard work of you and your team! I'd also come to the conclusion, after researching, that the Montana Mask seemed the most promising design. However, I had seen User/Maker comments describing drawbacks to it, and having no experience in modifying CAD files, I didn't know how I could correct them. I was very happy to have found your modified design, which corrected all of the noted shortcomings!!
Keep up the great work!!!
OK, full dimensions for all sizes have been added to the Google Doc. Yes, you would want to request to have these printed in TPU for the mask body and PLA for the filter frame component. Depending on the 3D printing service you're using, they may or may not have the ability to print TPU. Good luck!
@@3duniverseOrgWelcomesYou Thanks so much for the update to the Design Documentation, regarding the added measurements, I appreciate it!
I also forgot to ask ... With regard to the Bag Air Filters that you are using from McMaster-Carr, any of the MERV 15 would be appropriate, right?
In your answer to a question below, regarding the bags themselves, you stated that "[you] cut the bags open so it's a large flat sheet of filter material. So the square piece of filter material ends up being a single layer." Is there any special method to the cutting of the bags, so that one ends up with one large piece? It sounds like each bag has more than one layer to it ... Is there any material (charcoal, fiber, etc.) in between the layers? Does it matter which side of the squares cut from the bags is facing out from the mask and facing in toward the mask wearer? Do the square pieces cut need to be cleaned in any way, before placing them into the mask? I realize that one gets many filters from the bags, but if necessary would it be advisable to sanitize them (e.g., with hydrogen peroxide) for reuse? Finally, in the Design Documentation, you indicate that the cut filter size is 2.5 inches square ... Does that measurement fit all the Filter Frame sizes XS to XL?
As far as we're aware, any MERV-15 filter would be okay, but the specific part number referenced in our documentation is the only one we've tested.
In terms of cutting the bags open. There's a seam that goes around the outer edges that needs to be cut. There are also strips of material running vertically down the length of the filter every few inches to connect the two sides together. Those strips can be pulled off carefully. Then you should be left with one large sheet of filter material. As far as we're aware, there is no material between the filter layers. It appears to be the same material all the way through.
The same 2.5 inch square size should work for all mask sizes. There will just be a little extra margin around the edges for the smaller size masks, which is okay.
@@3duniverseOrgWelcomesYou Thanks for the information, regarding cutting the bags and the cut size for the filter! As to the MERV-15 Air Bag Filter mentioned in the Design Documentation, there is only a link provided to a McMaster-Carr Bag Air Filters page, which has listings for MERV 10, 12 & 15 Bags, in a variety of sizes (with different part numbers) for each. I assume that any of the MERV-15 Air Bag Filters listed on that page will suffice.
(The Gasket, which also has a link to a McMaster-Carr website, does open to the page of a specific part number 4869A68.)
couldn't you make it just 1 filter size in a effort to get manufacturers to make and sell the best ONE filter that would be more compliant with the CDC. It is cheaper to tool up to make 1 filter then 5 sizes. yes i know that if i am making them it doesn't matter.
We explored that option, but with the current design, we would have to standardize on the smallest size in order to make the filter size the same for all 5 sizes. The result is a 23% reduction in the filter surface area at the large size. We are working on alternate approaches that would allow for standardized filter sizes and even the ability to attach standard filter cartridges, but that will come in a future version of the design.
@@3duniverseOrgWelcomesYou Also we are not in normal times , as having a list of filters to harvest raw materials allows for more supply, aka what is on stock now / in county vs slow boat to china etc. Keep in mind these filters may be used in infrastructure 🏥 as their intended purpose aka building filter . We are living in times of scarcity, try to get the copper filament .
what printer do you recommend to make these that is affordable?
cr-10s i a good choice , easy to assemble , also the Prusa is a nicer upgrade .
My wife works for a doctor and he found out I had a 3d printer, he has offered to buy me a new printer up to $600 so I can print masks for some of his patients. Any printer recommendations? Thank you.
Check out the Creality CR-10S
I have the Creality CR-X, but Creality CR-10S is a great printer .
could you heat up the mask if it is printed in PLA and form it to an individuals face just like the copper 3d mask
Yes, thermoforming is recommended if you decide to print the mask in PLA. Our testing shows that it doesn't provide a good enough seal on the face without that.
Thanks
awesome! 🤘😲🤘
Is it possible to add an exhale valve to the design?
That seems like it might reduce the protection the mask provides to others. One of the best things mask wearing can do is reduce transmission in both directions, so it seems you would want both inhalation and exhalation to pass through the filter.
Hi, thanks for improving the design. I was wondering if it could be possible for you to share all the parameter to print with an ultimaker S5 and TPU material (maybe a screenshot of each section). I have one at work. I am quite novice in printing with this model and do not want to make any mistake. Thanks for your answer
Yes, you’ll fine all of those settings in the documentation: docs.google.com/document/d/1n_1V9ROD3AiEMlA5_u5XAlIYw52CTDHddm8hrRz7xGM
@@3duniverseOrgWelcomesYou Hi Thanks for the answer. I have print some with the MDflex TPU materials but I can see some "stringing-effect" any idea on how I could improve the printing quality. Thanks for the input
@@pepanouillot4634 That depends a lot on the printer and the material being used. A lower temperature might help. You could also try increasing the retraction distance and retraction speed a bit. Even if there is some stringing, that's pretty easy to clean up. Just use a sharp blade to trim away most of the strings, then use a heat gun to melt away any remaining strings.
Amazing...🙌
i sliced the large with tpu with your settings. it says
16+ hours. is this normal? thanks! be safe
Depends on your layer height. With 0.3mm layers, it should be around 5 hrs. Using a 0.8mm nozzle will reduce it further.
Thanks. I was able to get it down to 10.5 hours with a 0.5 nozzle
@@kimballwiggins3976 It should take no more than 5 hours to print, so you may want to have another look at your settings. Try using 0.32mm layer height with 2 shells and 15% infill. That should get you to around 5 hours or a little less.
@@3duniverseOrgWelcomesYou What is your recommendation with a 0.8mm nozzle? I just purchased TPU filament and would like to print as many as I can at once. I have the Merv 16 filter just waiting to be used. Did you find out if one layer or 2 layers would suffice? Thanks in advance.