Filtered Face Mask

grabcad

A 3D printable face mask with a tight-fitting filter cover, utilizing a replaceable cloth-type filter. Designed specifically for the Covid-19 pandemic. After printing the mask using FDM technology, it's essential to seal it with epoxy or enamel to ensure an airtight fit, as FDM printing is not inherently airtight. For optimal results, use a filter material that can capture particles down to 3 microns in size. Cutting up a house air conditioning system air filter can be an effective option, as demonstrated by the use of an MPR-rated filter with 2500, equivalent to about 13.5 MERV rating and an efficiency of around 96.5%. The inner filter box cover must fit snugly within the mask, trapping the material securely between them. Using too thick a material may compromise the seal, necessitating resizing of the cover to achieve a proper fit. An additional layer of protection can be achieved by cutting sufficient material to cover the entire inside of the mask; however, this step is not strictly necessary if the mask is sealed properly. This extra layer will provide enhanced security without causing significant issues, provided it forms correctly to the shape of the mask. Two Solidworks files have been uploaded: Covid-19 Filter Mask-JB300 Imported.SLDPRT and Covid-19 Filter Mask-JB300.SLDASM. The latter file features a deleted imported .STL file, which is available in the former for reference purposes. The assembly, STL, and STEP (AP214) files were generated from the second Solidworks file. A simulated cloth version has been included, albeit with an imperfect representation due to limited knowledge of realistic cloth simulation. Visually appealing attachment points were initially added using edge fillets; however, this approach resulted in suboptimal printing quality, leading to their removal. It's exciting to see how others can improve upon and build upon this design, and feedback is encouraged through a message.