Robins SPARK community mask v2

Model Description

Model ID 3DPX-013505Category Labware & DevicesDevice Use Safety and Personal Protective EquipmentKeyword(s) PPE, mask, FFF, FDM, TPU, HEPA filterDeveloped by the Robins SPARK Innovation Hub, Robins Air Force Base, in collaboration with Mercer University and the Air Force Advanced Technology and Training Center. This community mask provides the capability to utilize recommended filter substitutes like 1500 rated or above HEPA (demonstrates minimum removal efficiency of 99.97% particles greater than or equal to 0.3 um in diamter). NOTE: There are different variaties of HEPA which utilize synthetic materials; Please ensure the material you choose does not contain fiberglass. Additional information on HEPA via NIOSC documentation: The mask was printed in TPU material for mask flexibility to accommodate a better seal and with PLA for the inner filter adapter to secure filtration material. Successful qualitative fit tests were conducted at the Coliseum Medical Center, Macon. The design includes a larger filter area to allow for easier breathing.Silicone tubing was used around the inner edge of the mask to increase seal effectivenss (1/8" ID, 1/4" OD, 1/16" thickness). NOTE: This 3d Printed substitute does not guarantee 100% protection against the transmission of the COVID19 and is intended to use as is. However, it will at least offer some increased protection which has been reinforced by research in materials, design, and qualitative testing. Credit to the following:SrA Aaron Dabney, USAFSSgt Jason Barnhart, USAFSSgt Imani Burnett, USAFMSgt Benjamin Weiland, USAFMSgt Andrea Weiland, USAFMSgt Luis Torres-Salas, USAFDr. Joanna L. Thomas, Mercer University Mr. Jacob Sokolove, Mercer UniversityMr. Sagar Patel, Mercer UniversityMr. Colin Petherbridge, Mercer UniversityMr. Brian Weaver, AF Advanced Technology and Training CenterPlease contact Robins SPARK at for any questions. Segmentation Software Slic3r3D Modeling/CAD Software Autodesk Fusion 360Printer Make/Model Lulzbot Taz Workhorse Prusa Makerbot Method XPrint Units mmPrinter-specific Build Instructions Specific material TPU and PLANumber of prints per build 3Build time 6Pre- and Postprocessing Instructions Manufacturer Instructions:For print sizes: Use the following percentages for both sizes: 100% = Large, 95% = Medium, 90% = SmallMask - Utilized TPU and printed with a 0.4 nozzle at approx 230-240C (pending on type of TPU used; see optimal temps with your TPU manufacturer) with a layer height of .2mm and 20% infil. You can also chose to configure for 4 walls and 10% infil. When printing with TPU, slow down print speed to ensure a good print especially for the first layer (20 or even 15 mm/s). No retraction was used. TPU printing may take some time. PLA can also be used in place of TPU. In this case, adjust printer to match your optimal PLA temps (per manufacturer) and use same settings of .2mm layer height with a .4mm nozzle, 20% infil or increase walls to 4 walls and 10% infil.Mask Filter Adapter - This is the inner adapter piece that holds the filtration fabric in place. Use regular PLA filament (or harder type) to ensure filter will remain secure inside the mask to ensure a good seal. PLA insert was printed with a 0.4 nozzle at approximately 210-215C with a layer height of 0.2mm.Filtration Fabric - EnviroCare HEPA cloth vacuum bags (synthetic / polypropylene material) 2000 series (or better can be used) were utilized which provide up to 99.97% filtration of particles up to 0.01 micron. Cut fabric to the shape of the Mask Filter Adapter with at least 15-20mm overlap to enable it to wrap inwards when securing the Mask and Filter Adapter together.Assembly - When assembling the mask, filter adapter, and fabric, simply lay mask on flat surface with inside of mask facing up. Align filtration fabric inside the mask to match the shape of the opening (where the filter adapter will go). Finally, carefully align the filter adapter (trying to keep the overlapping fabric even) and simply push filter adapter into place to secure fabric with a tight fit. Strap - Regular bungee-like cord was utilized however any strap can be used. Cord can be fastened with a knot like shown in the pictures.Silicone Tube - The following silicone tube was utilized to provide additional seal reinforcement:McMaster-Carr Product #5236K506 High-Temperature Silicone Rubber Tubing for Air&water Soft, Durometer 35A, 1/8" ID, 1/4" OD, Opaque White, 25 ft. LengthSimply cut the silicone tubing to match a length that will cover the surface area that will contact your face. Cut with a little excess to ensure a completed circle when fastened to the mask. With a small amount of superglue, fasten silicone tubing along the inside and very edge of the mask (see photos). go slowly to ensure tubing is straight and adhering to the mask with no gaps. When the silicone tube reaches end to end (completing the circle around the mask), cut the excess to complete the circle leaving a hairline or two extra to ensure the ends are snug to one another (naturally pressing into each other). A little drop of glue on the ends can also seal the deal! If there are any noticeable gaps where air seems to be escaping near the chin area, additional tubing can be cut (slit longways into a half-circle) and fastened on top of first tubing layer. Attribution Instructions Pls credit Robins SPARK, Mercer University, and ATTC when applicable. Reviewer Notes Dear author, Thank you for submitting your design to the NIH 3D Print Exchange. You are receiving this message because your submission uses terminology that may not reflect the device function. Any term used in the title, description, or documentation must conform to the guidelines outlined by the FDA. There is no record of your device meeting the specific standards required to be labelled as a "N-95 Respirator Alternative” or "Respirator". Any instance of the terms "N-95 Respirator Alternative” or "Respirator" will be replaced with “community use face mask" so that there is no miscommunication with users of the NIH 3D print exchange about the efficacy of PPE on the site. Please let us know if you would prefer not to accept the changes, and we will instead place your design back into prototype status. Please let us know if the changes in terminology are not acceptable within 3 business days (1/15/21).Thank you. Dear author,Please add specific instructions for manufacturing and assembly and bill of materials (specifically source for HEPA filter) before further testing can be done.Thank you. This device is a general purpose face mask intended for use in the community and is not suitable for use by a healthcare professional or in a healthcare facility or environment, as described in FDA Guidance Enforcement Policy for Face Masks and Respirators During the Coronavirus Disease (COVID-19) Public Health Emergency, Section V B. This device has not been tested to assess the out-gassing limits of the material or their corresponding health effects.*These models sourced with permission from the NIH 3D Print Exchange*


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TDP Category Type Filename Size
General Instructions application/pdf images.pdf 2.30 MB
Native CAD Robins SPARK 4APR20 v2 Mask.dxf 64.00 MB
STEP File Robins SPARK 4APR20 v2 Mask.step 1.47 MB
STL File Robins SPARK 4APR20 v2 Mask_0.stl 1.78 MB
Blender-generated-x3d Robins SPARK 4APR20 v2 Mask_0.stl60bfc81767f05.x3d 1.23 MB
STL File Robins SPARK 4APR20 v2 Inner Filter Adapter_0.stl 1.16 MB


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