Commit 444084ae authored by Matt Carney's avatar Matt Carney

updates for 2020-04-13

parent 422c8f23
......@@ -4,17 +4,27 @@ We aim to mass produced using traditional manufacturing proceses a resuable, ste
We have identified an ideal candidate filter media working with https://www.hollingsworth-vose.com/ that meets spec for our given cross-sectional area.
We are cutting tools on Monday (2020-04-06) and shipping first articles to Atorlabs in FL for NIOSH testing, Wakeforest Baptist Hospital in NC for particle testing. If those pass we will then forward samples to MGH for final testing and verification.
Likely there will be a design update prior to final scaleup.
Main progress is being tracked inside a private (private in order to manage Signal/Noise ratio) slack channel on http://helpfulengineering.org
A quick update of progress from 2020-04-01 can be found [here](https://docs.google.com/presentation/d/1jY9FE1if-1H9EG4_PTsXMSJp7RggyXXnRyWPLdJphJE/edit?usp=sharing)
A little more info can be found at https://maskproject.tech
## 2020-04-13
First tooled component from our prototype LSR facility in OR [at Kaos Softwear](https://www.kaossoftwear.com/).
Cutting molds on horizontal and vertical mills.
![alt text](media/horizontalMilling.jpg "Horizontal mill for prototype mold bases.")
![alt text](media/verticalMilling.jpg "Vertical mill for prototype mold bases.")
Main progress is being tracked inside a private (private in order to manage Signal/Noise ratio) slack channel on http://helpfulengineering.org
First tooled components from Protolabs should be shipping today.
A little more info can be found at https://maskproject.tech
We are testing filter material at four different particulate testing facilities: CBA, MIT Chem. Eng. Smith College, Wakeforest University. Some important factors is that air velocity changed kinetic energy of particles. Non-woven media relies on electrostatic charges that may act differently with different particle types: NaCl will be havior differently from Au or Latex spheres, or incense smoke. These are all good particles to test, but likely to produce different results than the NaCl specified in the N95 specifications.
We are also coordinating with some Media Lab member companies that can do bacterial challenges to the filters.
In order to better understand air velocity and residual CO2 in the masks we are moving forward with CFD analysis. Suchit Jain from Solidworks has been helping us get moving on this. We are starting with an analysis that has been tested on prototype hardware already such that we can validate our simulation. Once simulation aligns reasonably well with collected data we can assume it the filter media and boundary conditions are reasonablly appropriate to be used for design iterations.
![alt text](media/simulation_01.png "Top plot is CO2 content, and bottom plot is air velocity at the filter.")
## 2020-04-07
......@@ -41,9 +51,18 @@ Specific ASTM testing results/needs requested for our effort :
Our MASKproject.tech is in line for testing at MGH, though validating filter data sooner than later would really expedite fixing design challenges. We've got 200 masks incoming Friday from the injection molders and have NIOSH ongoing, but the ASTM filtration validation at higher velocity is really important to validate efficacy.
## 2020-04-06
We are cutting tools on Monday (2020-04-06) and shipping first articles to Atorlabs in FL for NIOSH testing, Wakeforest Baptist Hospital in NC for particle testing. If those pass we will then forward samples to MGH for final testing and verification.
Likely there will be a design update prior to final scaleup.
## 2020-04-05
Here is an exploded view, and below that is testing at a NIOSH testing facility from over the weekend. The face mask shown is already outdated.
![alt text](media/Exploded - 2020-4-4A.PNG "Exploded View")
![alt text](media/testingNIOSH.jpg "Testing to NIOSH standards")
## 2020-04-01
A quick update of progress from 2020-04-01 can be found [here](https://docs.google.com/presentation/d/1jY9FE1if-1H9EG4_PTsXMSJp7RggyXXnRyWPLdJphJE/edit?usp=sharing)
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