Week 4

At the end of Week 3 (Friday, May 1st), we presented our project proposal to the class. After some feedback from the instructors and TA's we continued to work on our CAD model. The base structure of the model, as pictured below has not changed, but we did change the dimensions of the seal. The seal is now a tube with an outer radius of 1.5mm and an inner radius of 1mm. The T shape that fits into the edge of the mask is .25mm deep, with a width of 1.5mm. The seal is also pictured below, both as a sketch view and as a 3D view.

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In class during week 4 (which is week 5 of class time, as the project started on Friday of Week 1), we discussed manufacturing techniques. This led to the discussion of how exactly we want this product to be produced. Some of the components are standardized components that are much easier to simply purchase, such as the screws that hold each of the filter pieces together and the strap that will hold the mask to the face. Other components are too advanced for us to reliably produce in the shop, such as the filter itself. The remaining components are what we will manufacture in the shop ourselves. This includes the mask itself, which will be 3D printed, the silicon seal, which can be molded and several cartridge components of the filter, which will also be 3D printed. The difficulty in this lies within the printing of the face mask itself. The face mask, being shaped to the face, has a geometry that is difficult to print. We will begin to work on figuring out this problem over the next few weeks.

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At the end of week 4, we were able to deliver a new iteration of our model, as well as have a more complete understanding of what we need to do to begin to manufacture the product. Our goals for week 5 are to begin the computer aided analysis of each of our components, and to be able to move into week 6 almost able to print.

Thanks for joining our group on this journey!

-ENGR113S Group 8