3D Printing A Respirator – Part II – Available Online Resources
Over the last 48hrs, more designs appeared online. I decide to take time and collect the available online resources into one place. With many people off-work and considering how to prepare for medical shortages, many new ideas appear each day. Also, existing ideas get refined and updated, so keeping up-to-date with the latest can get challenging. You may also check out part I of this article, for further discussion regarding the hunt for a 3D printed respirator. This design rang in at 5 hours and 13 minutes print time on my Cube3D. Also, worth mentioning, I noticed vacuum bags perform well as a substitute filter media.
NEW http://jordanpelovitz.com/elevons-covid-19-respirator/ – Elevons respirator is a dual-filter design, I’m currently printing to test the default fit! Looks great, can’t wait to get it printed for critique. The designer concluded from feedback that the respirator needs two filter inlets for easy airflow. I like the look of this design, but I’ll need to print one, before I can offer more comments. The model looks very nice, and if it works I can start printing these asap.
https://www.billingsclinic.com/foundation/3d-printed-surgical-mask/ – This story comes out of Montana, with an effort spearheaded by Dr. Dusty Richardson at the Billings Clinic. They have source files available and instructions, with an in-depth write up. UPDATE: I printed one of these up, and it didn’t fit great. I will revisit this design later, but for now it doesn’t seem feasible for a large variety of faces. Still the housing seems very sturdy and the print goes by relatively quickly at 3.5 hours. This mask has a lot of promise if the fit improves.
https://docs.google.com/spreadsheets/d/1kXR0oOvdy2rVdrikFu8PWgCwcrKGRho1jy-caoBQ-TI/edit?usp=sharing – Shared Google Sheet that shows several 3D printed concepts for a broad-range approach to fighting Coronavirus, including ventilator valves and some devices for operating doors without touching the doorknob or door handle. There’s also an app designed to catalog products and track medical requests to go along with the spreadsheet available at https://3drenders.glideapp.io
https://www.thingiverse.com/thing:4145742 – 3M 7502 Cover. This thingiverse item plugs one of the holes on a dual-filter respirator from 3M. It took me about an hour to print one out, and I’ve got some feedback after a little testing. The plug fit was a little too tight in my opinion, and can benefit from a little sanding on the bottom to make the material on the base a bit thinner. After having used the dual-filter mask extensively, using only one filter felt restrictive. Still, in an emergency I would rather a single-filter, than nothing at all. I used the single-filter mask with the 3D printed plug, and washed my car, which is light aerobic activity. So, I think it would work to help extend the supply of available filters, but two-filters remain optimal for any serious exertion.