Respirator Mask and valves

thingiverse

It isn't difficult to do the right thing. This is available for everyone in the world to use for good. My thanks go out to Dr. Richardson and Dr. Zaugg, creators of the Montana Mask, who inspired me to take action, and Jacob Morin who helped with the design. Files should include the original mask (Mask 1), a ribbed design (Mask 2), the parts needed for printing filters (and casting as required) as well as a mold for the mask. My primary goal in sharing this is to have people with 3D printers provide molds to those without, so they can buy silicone and gloves and make multiple high-performance masks at a relatively low cost. 1. 3D printing is just one step; it's not the solution to creating functional masks. 3D printed masks are hard, uncomfortable, and don't conform to create a seal on the face. 2. We need to make a mold where we can coat with a flexible, durable material that can hold the filtration element. 3. My approach is to use a strong, flexible material called Dragon Skin made by Smooth on. It's easy to clean, skin-safe, and only costs $200 for 2 gallons or under $50 for small kits. Spray the inside of the mold with Ease Release, a separating agent that prevents the silicone from sticking to the mold. Follow product guidelines. After applying the separating agent, Dragon Skin can be poured into the mold (around 250 grams per mask) and roto cast/sloshed until it solidifies. It cures quickly and can be brushed around or moved with a gloved finger until it starts to "gum up" and solidify. Purchase Dragon Skin here: https://www.reynoldsam.com/product/dragon-skin/ You will be casting copies in Dragon Skin, not molding a master object. I'll upload a video soon of me pulling casts from the mold. Ease Release can be purchased here: https://www.reynoldsam.com/product/ease-release-200/ 4. Once the mask is thick enough, it can be pulled out of the mold. Punch 4 holes for the straps on the sides and then cut out the center circle for the filter piece to fit through. 5. The filter piece looks like an Avocado with a threaded tube extending from it. This fits into the mask from within. 6. There's a small CIRCLE X piece that fits into the front of the Avocado, holding the filter material in place. 7. Place filter material over the CIRCLE X. Depending on the length of the threads, you may need to secure the AVOCADO with a nut or use the end cap to hold it in place against the CIRCLE X and provide compression. 7A. The AVOCADO X doesn't require printing out the X piece; however, if you're molding and pouring plastic copies, using the AVOCADO NO X is much easier. The Billings Clinic is currently purchasing medical-grade filtering material from High Tech Filters, but you may be able to find something local that meets medical requirements. https://www.flowmarkhightech.com/ This isn't a complicated device or mold. If I can make them in my basement, I'd love to see big industry take the next step and produce these masks everywhere. If we print the molds and distribute them, almost anyone can make masks from home regardless of their 3D printing capability. It literally takes mixing cups, a Popsicle stick, and gloves. A separating agent will help the mold too, but the cost per mask becomes reasonably low quickly. Go forth and do good things.