The Shield, Mk IX

For a couple weeks, our makerspace has been printing PPE for local doctors and front line workers. We quickly fell in love with Joel Telling's "Manta Ray" face shield, as it combined the best of two NIH-approved models, the Prusa Shield, and The 3D Verkstan shield. With nearly 1,000 pieces of PPE printed, the most significant feedback we recieved from those who had used both of the other shields was that the Manta Ray put the shield material too close to the user's face, making it more prone to fogging from breath. After a number of revisions, this shield visor is the end result, and we feel it brings together the best of all current NIH-approved shield designs. It has the curved front and distance from the face that makes the Prusa shield superior. It also features a headband that holds to the head on its own and doesn't require a band for most users.

There are four files included:

Shield Mk IX - This is a single-print copy of the shield.
2stack Shield Mk IX - This is a stack of two shields using shims to seperate the models from one another easily.
8stack Shield Mk IX - Similar to the two-stack, for those who would like to print large numbers, or run their printers overnight.
Shield Mk IX cap - this is a printable cap to the model that provides a reduced opening between the user and the shield. Pressure fits into the shield openings, so no adhesive is needed.

Instructions for great printing are in the print instructions tab, but one important consideration for the multi-stacks is that they are optomized for a .28 layer height, and "print thin walls" (or your slicer's equivalent) should be enabled to make sure the shims print. The rest of the settings can be tweaked to best suit your machine.