N95 Respirator Prototype

thingiverse

UPDATED March 25, 2020 -- 8:40 AM (US ET) Photos of printed objects of V1.2 now available online. Medical professionals advised us to make changes for V1.3, which features larger slots for filter and airflow. Photos of V1.3 will be added as soon as the print finishes. Editable TinkerCad Files: V 1.2 https://www.tinkercad.com/things/4ZpMQAOoale V 1.3 (better filter air flow) https://www.tinkercad.com/things/kXAtk5TmIlc Instructions for V1.2: You will need to print one mask and two each of the "tapa" and "circulo honey" files. A possible fix for threading issues is mentioned in the comments. Instructions for V1.3: Print one mask, and two each of inner filter divider and outer filter guard. This design is being submitted for medical approval in the USA on March 25, 2020. Our Prusa MK3 with Hatchbox PLA has required some adjustments to print successfully. We applied a small amount of glue stick before starting the print and then adjusted the printer settings to slow down speed to 80 and nozzle temperature to 210. This change seems to have improved print integrity. We plan to switch to TPU and increase extruder flow as soon as we receive more TPU shipments. This design is an attempt to improve a faulty design from Copper 3D (copper3d.com/hackthepandemic), which may be a scam since they encourage printing using their high-priced "copper infused" PLACTIVE filament. We are testing this remix of their original design, which had significant gapping and leaking around the nose and chin. For assembly instructions, please visit the link above (assembly is pretty straightforward). Simply use a hair dryer or heat gun to make the PLA pliable, then shape it to fit your face. This has not been tested or approved as a medical device. Use at your own risk.