Summary The Silvana adapter for Decathlon face masks can be used for CPAP assistance to help fight the COVID-19 disease. The functional design is inspired on Charlotte valve from Italy, redesigned from scratch with the philosophy of making it directly printable as clean as possible on commonday 3D printers. Project information: http://help4corona.eu/ Originally there were four configurations: Small / Small-d / Large / Large-d. From April 6, 2020 many more configurations are available. The more common "Small" version fits Decathlon Subea model 1 (white connector, size approx. 45x19 mm). The (older) "Large" version, from v1.0 having configuration "W" fits Decathlon Subea model 2 (transparent connector, size approx. 53x23 mm). The "D" configuration (prior to v1.0 indicated by suffix "-d") indicates that exhaust port has 22M port size (conical 22 mm male) for standard ventilation equipment. The "C" configuration (prior to v1.0 without "-d" suffix) the exhaust port has outer diameter 19.4 mm, matching specific ventilation valves as used in the original Charlotte adapter design from Italy and from v1.0 having depth 20 mm and tapered 1.43° (1:40). "F" indicates 22F output port; "FF" also has a 22F input port "T" (from v1.0) indicates dual input port. V Vincent Groenhuis Silvana Decathlon face mask adapters VIEW IN BROWSER updated 10. 4. 2020 | published 9. 4. 2020 3D MODEL ONLY
Transcript
Summary
The Silvana adapter for Decathlon face masks can be used for CPAPassistance to help fight the COVID-19 disease. The functional design isinspired on Charlotte valve from Italy, redesigned from scratch with thephilosophy of making it directly printable as clean as possible oncommonday 3D printers.
Project information: http://help4corona.eu/
Originally there were four configurations: Small / Small-d / Large / Large-d.From April 6, 2020 many more configurations are available.
The more common "Small" version fits Decathlon Subea model 1 (whiteconnector, size approx. 45x19 mm). The (older) "Large" version, from v1.0having configuration "W" fits Decathlon Subea model 2 (transparentconnector, size approx. 53x23 mm).
The "D" configuration (prior to v1.0 indicated by suffix "-d") indicates thatexhaust port has 22M port size (conical 22 mm male) for standardventilation equipment.
The "C" configuration (prior to v1.0 without "-d" suffix) the exhaust porthas outer diameter 19.4 mm, matching specific ventilation valves as usedin the original Charlotte adapter design from Italy and from v1.0 havingdepth 20 mm and tapered 1.43° (1:40).
"F" indicates 22F output port; "FF" also has a 22F input port
"L" indicates loose fit, to be used if the normal version is too tight due todimensional variations.
"N" (till v1.1 only): indicates no support structures are included, to be usedfor 3D printers which do not need supports (or generate these already).From v1.2 supports are not needed for the small adapter.
The following configuration combinations are available for directdownload: C, CL, D, DL, F, FL, TD, TDL, TF, TFL, CW, DW, FW, TCW, TDW,TFFW
Single-port output for "PPE" purposes (be warned about effectiveness):check https://www.prusaprinters.org/prints/29147-valentine-decathlon-face-mask-adapters
Decathlon masks come in five different sizes, but it seems that theconnector type is not directly related to mask size. The "small" size is theold, mainstream version. The "large" size is relatively new.
NO supports needed. 0.2 mm layer height is fine. After printing (v1.1 andearlier): remove the support parts (X or L shaped). Do not attempt toremove the square-shaped central shaft in v1.2 and later.
Developed by Robotics and Mechatronics, University of Twente, in closecollaboration with TechMed (UT), IHU Strasbourg and various otherpartners.
Feature requests are welcome, e.g. a configuration with specific port indifferent length or connector size. E-mail [email protected] to discuss.
Changelog:
-- Small version: -- v1.3 April 9: Corrected 22M/22F connectors with propertaper angle (was 1:20, now 1:40) v1.2 April 7: Redesigned central shaft,eliminated supports and "N" configuration, reshaped steep overhangs,increased wall thickness in "C" configuration v1.1 April 6: DLN, FL, TFLconfigurations: fixed configuration inconsistencies v1.0 April 6: Rebrandingto "Silvana" name, release of v1.0, new configuration scheme. Added 3-port and 22F (22 mm conical female) exhaust port variants. Tightness ofnon-"L" model improved. 22M tubes start at 21.7 mm instead of 21.5 mmfor better fit with external pieces. The "C" configuration (20M exhaust) haslonger fitting and is now tapered, to fit external pieces better. v0.8.7_LooseApril 3: Slight modification of v0.8.7 with loose fit, in case v0.8.7 is tootight due to dimensional variations. (Model labeled "v0.8.7L") v0.8.7 April2: Text embossed instead of debossed to avoid (too) thin walls at locationsof text v0.8.6 April 1: Redesigned clamping mechanism: tapered walls forrigid claming and rubber ring now only for sealing. Adapter is now easierto push in fitting. v0.8.5.1 March 30: Fixed error in small-d_v0.8.5 (wrong
connector type exported) (warning: v0.8.5(.1) is (too) tight!) v0.8.5 March30 Adjusted mask-adapter connection to improve tightness; tapered intakeport mask-adapter connection for improved sealing; adjusted output portsto conform to ISO5356-1 (22 mm tapered); resolved slicing error (warning:v0.8.5(.1) is (too) tight!) v0.8.4 March 29 Output ports conical: 22 mm 1°v0.8.3 March 29 Eliminated bridges / difficult overhangs in intake airwayv0.8.2 March 27, Extra room for rubber ring around mask connector v0.8.1March 27, Small fix to improve printability of bridge v0.8 March 27,Improved small version, better attachment, wider connection left/rightside, exhaust connection angled further away to allow 2 filters, thinnerwalls so less material needed so you can print solid. v0.7 March 26: firstversion but note that attachment does not separate intake/exhaustproperly yet.
-- Large version: -- v1.1b April 9: Published FW, TDW, TCW, TFFWconfigurations; put "Front"/"Back" signs on body; put flow direction arrowson certain configurations v1.0 April 6: Renamed to "Silvana", from v1.0 the"Large" version is indicated by the "W" configuration in the name, e.g."Silvana-DW-1.0" v0.9.8 March 30: Adjusted output ports to conform toISO5356-1 (22 mm tapered); tapered intake port mask-adapter connectionfor improved sealing; resolved slicing error; moved texts to higher positionto avoid thin walls v0.9.7 March 29: Output ports conical 22 mm 1° v0.9.6March 29: Removed last patch of bridging in intake port v0.9.5 March 28:Minor adjustments v0.9.4 March 28: Improved printabilty v0.9.3 March 28:Fixed printing imperfections v0.9.2 March 28: Fixed inconsistent wallthickness on exhaust port v0.9.1 March 28: Reinforced potential weak spotv0.9 March 28: improved sealing of center shaft, improved 3d printability,varioud minor improvements v0.6 March 26: first version.
Costumes & Accessories > Masks
medical mask face adapter
NO supports needed. Print 100% solid to avoid creation of internal cavitieswhich may trap liquids.
After printing remove the two X or L shaped support pillars from the maintube (2nd photo).
Then, carefully inspect the intake airway for loose strands of filament (ifany) and remove them with pliers. (The part is carefully designed to limitoverhangs to 45° and minimize difficult bridging features in the intakepathway; further improvements ongoing).
Model Files (.stl, .3mf, .obj, .amf) DOWNLOAD ALL FILES
4.4 MBupdated 7. 4. 2020
4.4 MBupdated 7. 4. 2020
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4.4 MBupdated 7. 4. 2020
Some very thin hairs of filament may still be present which are difficult toobserve by the human eye. These can be eliminated with a heat gun,blowing hot air through the intake airway in both directions for a shorttime (2 seconds). After this step carefully inspect the airway again.
The exhaust airway cannot be inspected entirely due to the hiddenstructures, but this aspect is less critical as air only flows away from thepatient. Still, try to detect and eliminate loose strands of filament (if any)and use a heat gun to eliminate thin hairs.
Sterilization (not recommended for porous materials): PLA adapterswithstand up to 65°. PETG/CPE at least 80°. CPE+ and exotic materialseven higher.
You can try elevated temperatures (e.g. 80° for PLA) as long as the part isnot under stress. It will retain its shape and return to normal strength aftercooling.
Chemical sterilization: should be possible; experiment UV sterilization: notrecommended as parts are opaque which blocks UV.
Please let me know ([email protected]) if anything is incorrect andshould be updated.
