BE Mask (Version 1.3.4)

This model has not been assessed for community use or in a clinical setting. Further optimization may be required.

Submitted by:

BE Team

Thu, 2020-05-21 13:15

Vertical Tabs

General Information

Model ID

3DPX-014408

Category

Labware & Devices

Device Use

Safety and Personal Protective Equipment

Keyword(s)

PPE, BE Mask, FDM, TPU, mask

The BE Mask is a 3D-printable reusable mask with replaceable filter inserts. Our documentation describes our use of novel materials, fit considerations, assembly process, seal, sizing and filter cartridge efficacy.

Full documentation can be found here.

3D Modeling/CAD Software

Autodesk Fusion 360

Model Origin

Hybrid: data + illustration

External Derivative Source

Montana Mask

How to Make

Printer Technology/Material

Flexible

Polylactic Acid (PLA)

Printer Make/Model

Ultimaker S5 and S3

Dremel 3D45 when printing TPU

as well as the Prusa MK2 for PLA

Print Units

Scale At Given Print Units

real-world size

Printer-specific Build Instructions

Number of prints per build

N/A

Build time

It can take 2.5 hours to 6 hours to print a mask, depending on nozzle size, layer height, print speed, and other settings

Pre- and Postprocessing Instructions

Printing FAQ

Q. What kind of 3D printer and settings do you recommend?

A. While many printers may be suitable to print the BE mask, we offer specific settings for the Ultimaker S5 and S3 and Dremel 3D45 when printing TPU, as well as the Prusa MK2 for printing PLA (see our Printer Setting Details below). When it comes to settings, every printer is different. If you have found better settings for these or other printers, please share your results on the BE Hub space.

For our general TPU printing process, we have used:

Extruder Temp: 225-235C (depends on TPU brand)
0.25-0.32mm layer height
15% infill
2 shells
4 top solid layers
3 bottom solid layers
To minimize print time, consider using a 0.8mm nozzle
Print speed: 25mm/sec (30mm/sec for infill)
Fan speed: 50%
106% flow rate
Built without supports

Q. How long does it take to print?

A. It can take 2.5 hours to 6 hours to print a mask, depending on nozzle size, layer height, print speed, and other settings. Your printer bed may be large enough to “batch print” multiple masks in a single run, but this may lead to some “stringing” between masks when printing in TPU, which requires additional cleanup after the print. Before attempting a batch print, we suggest you get the settings right for a single mask.

Q. What mask materials do you recommend for production?

A. We designed for a semi-flex TPU mask body, and a PLA filter insert. TPU is flexible, it conforms to the contours of the face for better seal and comfort. PLA is relatively rigid, it’s better for holding the filter firmly in place. For new printers, we recommend the TPU Print Test before creating masks as a quality check. For more information on our materials, please review our Biocompatibility Assessment and Materials within our Testing and Validation.

Q. How many masks can you create with a 1kg spool of material?

A. Each mask uses about 45-55g of TPU material, depending on the mask size being made. This means you can expect to make around 20 masks with each 1kg spool of material.

Files and Downloads

Files for this design are available with version notes. 3 mask sizes and filter frame cartridges included.

STL Files

CAD Files

Files are also available on Thingiverse and YouMagine

Printer Setting Details

2.85mm TPU

(settings based on Ultimaker S5 and S3 using 3D Universe Terrafilum TPU):

3D Universe Terrafilum TPU

Extruder Temp: 235C
Bed Temp: No heat with Magigoo or glue stick applied, or 40-60C without any adhesive
2 shells
1.5mm top/bottom thickness
15% infill (cross 3D infill pattern if using Cura)
Print speed: 25mm/sec (30mm/sec for infill)
Flow rate: 106%
Retraction enabled
Retraction distance: 10mm
Retraction speed: 15mm/sec
Retraction extra prime amount: 0.4mm3
Fan speed: 50%
Coasting enabled
To minimize print time, consider using a 0.8mm nozzle and 0.4mm layer height

1.75mm TPU

(settings based on Dremel 3D45 using Kodak Flex 98 filament):

Kodak Flex 98 Filament

Extruder Temp: 235C
Bed Temp: No heat
2 shells
1.5mm top/bottom thickness
15% infill (cross 3D infill pattern if using Cura)
Print speed: 25mm/sec (30mm/sec for infill)
Retraction enabled
Retraction distance: 6mm
Retraction speed: 25mm/sec
Retraction extra prime amount: 0.2mm3
Fan speed: 50%
Coasting enabled
To minimize print time, consider using a 0.8mm nozzle and 0.4mm layer height

1.75mm PLA

(settings used on a Prusa MK2 printer):

Use standard PLA settings (depends on the brand of PLA and type of printer)
0.20mm first layer height; 0.32mm layer height
20% infill
Consider using a larger nozzle and thicker layers to reduce print time

Attribution

Attribution Instructions

License

Hardware License

CERN OHL-P

Documentation License

CC BY 4.0 International

Please refer to the following the guidelines for the OSHWA certification program. The CERN-OHL-P is roughly analogous to the MIT open source software license, and the CC BY 4.0 will cover all of your documentation and other supporting information. Together these are designed to clear the way for a larger community to jump in to make/modify/improve the gear while retaining a sense of origin.

Attribution

If supplied, attribution provides the name of the creator and attribution parties, a copyright notice, a license notice, a disclaimer notice, and a link to the material. You must indicate if you modified the material and retain an indication of previous modifications. Example below:

This project link is a design derivative of the BE Mask created by the Buffalo e-NABLE Team.
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License (CC BY 4.0) and CERN OHL-P. Material has been modified from the Version 1.3.2

Disclaimer

The 3D printed mask information presented here is intended to assist the general public during the current global pandemic related to COVID-19 and the related nationwide shortage of personal protective equipment. Please be aware that this mask design is not intended to replace standard protective equipment such as N95 masks or surgical masks when that equipment is available. The use of these 3D printed masks has not been fully tested and has not been approved by federal or state authorities. The individuals associated with developing and producing this mask design assume no liability and make no representations, warranties, or guarantees regarding the safety, efficacy, or appropriate use of these masks in any particular situation. Each facility should test each batch of masks prior to relying on them for protection. Use of this information for any purpose is at the maker’s and user’s own risk

Documentation

Supplemental Documentation

BE Mask v1.3.2-20200521T165832Z-001.zip

Reviewer Notes

Dear author,

In order to proceed with your submission, we need to make sure specific print instructions are included in your design for users to properly recreate the model.

Please include best printing parameters for your design and update the submission at your earliest convenience.

Sincerely,

VA REVIEW TEAM