Model for Developer: Mask with Rd 40 adapter.

thingiverse

This prototype mask is for testing purposes only, use at your own risk. It's not designed as a filtered mask; rather, it serves as a model for my research and development process. Don't forget that without fresh air, the human body will perish! This device is meant to teach me how masks function, not provide actual protection. The mask features two valves - one for incoming air and another for outgoing used air. You can insert a filter with an Rd 40 size (NATO Filter) on the incoming valve. This prototype is not air-tight due to the inherent space between layers in 3D printing. To improve its seal, apply filler or paint to close any gaps. For better results, use window seals around your face to create a tighter fit. Part P0178-4-4 and Part P0178-4-5 are essential for this project. Print Part P0178-4-5 twice, then cut it in half along the middle section to bend it into place. Apply heat with a lighter to make the material more pliable before bending. This will allow you to manipulate the valve's opening and closure. For optimal results, use both parts together: P0178-4-4 provides structural support, while P0178-4-5 helps maintain an air-tight seal by holding the opening closed when not in use.