3D-printed Stackable Face Shields

Here is a finished print batch of 12 stacked face shields. I designed the shield frames to be stackable so that I can print a whole batch of frames stacked on top of each other every day. They easily snap off each other after printing. 

I was getting some major print errors because I was printing some of the layers too fast and too cold. I did some experimenting by modifying the G-code files to be able to get a perfect printing result. 

Here is a diagram of how I modified the speed and temperature of the printing process in order to get perfect stacking adhesion. 

Here is a 3D model of the modular, stackable design that maximizes the print volume of my home 3D-printer.