In times of the COVID-19 pandemic, plenty of makers, engineers and entreperneurs have joined forces worldwide to produce non-invasive nasal cannula based NIV respirators in order to fulfill the high demand for them. This proposal was created as a way to aid engineers in the production of such equipment. In this case, I realized that industrial face masks with double filter for gases (type 2400) of the Mexican brand Cabel, could be adapted into face masks for NIV respirators by 3D printing 3 pieces.
The product’s filters are changed by applying enough pressure to cause a temporary deformation of the rubber main piece. Hence, these filters could be removed and changed by the pieces that would work as a cap for one of the holes, and connectors to the inhalator and exhalator ports.
The 2400 model is only produced in black rubber, which is not useful for medical-grade products. Nevertheless, Cabel brand has other industrial face masks produced in beige rubber. Therefore, the 2400 face masks could be produced in a light color.
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*Note* I calculated the width of the respirator tubes using various grab cad models, for which this measurement should be checked out and probably adjusted before printing.
