This is an interesting project as it stems out from a core multi-directional project with MIT Center for Bits and Atoms in which the 3DEXPERIENCE Lab and SIMULA teams are involved. 

The single piece face shield design will be made using a process known as die cutting. Machines will cut the design from thousands of flat sheets per hour. Once boxes of these flat sheets arrive at hospitals, health care professionals can quickly fold them into three-dimensional face shields before adjusting for their faces.

http://news.mit.edu/2020/face-shield-ppe-manufacture-covid-19-0331

Extending the life of face masks

When used correctly, face masks should be changed every time a doctor or nurse treats a new patient. However, over the past month, many health care professionals have been asked to wear one face mask per day. That one mask could carry virus particles — potentially contributing to the spread of Covid-19 within hospitals and endangering health care professionals.

High-rate mass manufacturing

The die cutter machines used in mass manufacturing will produce the flat face shields at a rate of 50,000 shields per day in a few weeks. The manufacturer will continue to ramp up and increase the rate of manufacturing further with the ability to fabricate in more than 80 facilities nationwide.

Video here : https://youtu.be/WFjBvpcP2cE