Hello! I hope this post finds everyone well. JAMM is a group of four engineering students currently taking an Introduction to Engineering Design class (ME2300) remotely. Our latest assignment was to create a model for a face shield that could be 3D printed to help contribute to solving the ongoing lack of PPE. The attached files shows our developed design.
We incorporated many aspects of current masks when designing our model. The largest change we made was the way the mask would attach to the face- by the use of a "sunglasses" style fit. Along with having the frame rest against the wearer's face, there are two holes on the arms of the glasses that provide a spot to attach an external strap to fit the mask snugly to the face. We also added a visor-like guard to the top of the glasses, to eliminate any space between the forehead and the shield.
Printing wise, our model was made to be printed using an Ultimaker 3. The printing temperature would be set at 200°C, with the printing speed at 70mm/s. When printed, there would be a raft used, however, no supports.