3M mask to DAR filter adapter [v5]

grabcad

Here is the rewritten text: Adapter Piece for Standard 3M Half-Face Mask Now Available with Improved Formatting! A revised adapter piece for standard 3M half-face masks (6000, 7000 and FF-400 series) has been uploaded to PrusaPrinters.org. The new design addresses some of the issues present in the original version: 1. A rectangular, asymmetric shape makes it easier to handle when coupling/decoupling with the mask. 2. The adapter's shape provides instant visual feedback on correct placement - a feature missing from the cylindrical version. 3. The filter has been directed towards the back and sides, offering several advantages: a. Air inlet is directed away from the patient side, not towards it. b. Upwards air inlet position is closer to the intended use as described by the manufacturer's product specification. c. Re-positioning of the filter allows for greater freedom of movement when a face shield is used. 4. A wider flange offers extra seal around the adapter-mask interface, missing from the original design. 5. Filter piece is inserted in a way that even accidental removal of the cap from filter's luer-lock port does not expose the user to unfiltered air. A second filter can be replaced with a simple cap (soon to be added) to reduce filter use - breathing is comfortable with one filter. Printing Instructions: * 0.2 mm layer height, 3 walls, PLA or PETG, no supports * Use random Z-seam position for improved tightness * Make sure flow rate is properly calibrated to avoid under-extrusions in outer perimeters Please note that the mask itself does not provide filtration of exhaled air! It is only intended to protect healthy individuals, such as healthcare workers. This design would benefit from proper and rigorous testing to determine seal quality and maximum holding pressure. Please contact me if you're interested in helping out. WARNING! This adapter might not be suitable for use with 3M masks without proper testing. Use at your own risk! To print the adapter, follow these parameters: * 0.2 mm layer height * Minimum 3 walls * Filling >20% * No supports needed! Use the "random Z-seam" option to increase seal tightness. The adapter has been designed for crisis situations and is a one-time-use product. Its effectiveness relies on design assumptions and experience with similar constructions. Use at your own risk - ensure you follow proper use guidelines for Personal Protective Equipment (PPE) available in your facility. If you have a method for objective, instrument-based evaluation of seal tightness under varying pressures, please contact me.