3M half mask filters

Last crawled date: 4 years, 2 months ago

SK: K nakresleniu tychto filtrov na 3M polomasku ma priviedol zufaly stav z nedostatku respiratorov a filtrov v poslednej dobe kvoli koronavirusu. Musim hned na zaciatku pripomenut ze samotny virus je tak nesmierne maly ze nema problem preniknut cez vacsinu filtrov. Virus sa da zachytit pokial sa nachadza v kvapockach pri kychnuti a podobnej cinnosti.
Filtre ktore som nakreslil, su prisposobene na pouzitie obycajnych papierovych kapesnikov. Predpokladam totiz, ze kapesnikov je vsade v obchodoch dostatok a nie su ekonomicky drahe. Dalsia vec, ze v pripade potreby sa daju vymienat kedykolvek je to potrebne. Zacal som preto kreslit verziu malych filtrov, do ktorych som umiestnil jeden cely papierovy kapesnik v poskladanej podobe. Samozrejme kapesnik sa sklada z 3 vrstiev a je 5x prelozeny. Takze sa cez neho dalo len tazko dychat. Takze v malom filtri treba pouzit len polovicu vrstiev papieroveho kapesnika. Pre maly filter som nakreslil 3 verzie krytov filtra. Jedna je nakreslena so zubkami na zacvaknutie. V tejto verzii by nemali trcat z okrajov filtra kraje papieroveho kapesnika. Druha verzia krytu je nakreslena bez zubkov na zacvaknutie. Tam sa kapesnik iba polozi a zatlaci telom filtra. Okraje ktore trcia sa odstrihnu. Tretia verzia krytu je nakreslena s mriezkou.
Pokial by niekto potreboval dat do filtrov viac vrstiev cez ktore sa tazko dycha, alebo nejaky ucinnejsi filter cez ktory sa tiez tazsie dycha, nakreslil som aj vacsiu verziu. Je to velkost zhruba smartfonu. Tam som nakreslil dve verzie krytov. Jedna je klasicka s velkou dierou, a druha verzia je s mriezkou. Tam som nekreslil ziadne zubky na fixovanie krytu filtra na telo filtra. Tam predpokladam prelozenie papieroveho kapesnika alebo ineho media cez okraj filtra a odstrihnutie zbytku.
Samotne filtre som nakreslil s pomerne presnym bajonetovym zavitom firmy 3M ktore pouziva na polomaskach. Ja som skusal vytlacit tieto dielce len z PLA plastu, ale predpokladam ze nebude problem ich vytlacit z akehokolvek ineho dostupneho plastu. Tlacil som ich s 0,2mm kvalitou. Filtre su optimalizovane na tlacenie cez PrusaSlicer poslednej dostupnej verzie s tryskou 0,4 mm. (Upozornujem na podporu sliceru v Cinskom jazyku) Podpory su nutne, ale je dobre nastavit vzdialenost podpory od objektu v ose z na 0,5 mm.
Samotne telo filtra je dobre tlacit v polohe bajonet hore.
Kryty filtrov sa daju tlacit z obidvoch stran v pohode. Samozrejme verzie s mriezkou je dobre tlacit s mriezkou na posteli.
Okrem toho sa daju tieto filtre pouzit aj v piemysle v prasnom prostredi. Zistil som ze sa v pohode zmestia aj do zvaracej masky.
Pokial je niekto ochotny ma za tuto sadu filtrov odmenit, poprosil by som na bitcoinovu penazenku ktora je uverejnena v obrazkoch.
No a pokial mate k 3M polomaske originalne uhlikove filtre s prachovymi filtrami a chybaju vam k nim kryty prachoveho filtra, tu si ich mozete stiahnut a u seba vytlacit - https://www.thingiverse.com/thing:3982639
k stiahnutiu su tieto subory:
3M small filter
3M small filter cover version 1
3M small filter cover version 2
3M small filter housing with grille
3M large filter
3M large filter cover
3M large filter housing with grille
To draw these filters on a 3M half mask, I was brought to a desperate state of lack of respirators and filters recently due to coronavirus. I have to remind you at the beginning that the virus itself is so extremely small that it has no problem to penetrate most of the filters. The virus can be detected when it is found in droplets on leavening and similar activity.
The filters I have drawn are customized to use ordinary tissue. I suppose that handkerchiefs are enough in stores and not economically expensive. Another thing that can be exchanged whenever necessary. So I started to draw a version of small filters, in which I placed one whole paper handkerchief in a folded form. Of course the handkerchief consists of 3 layers and is folded 5 times. So it was hard to breathe through it. So only half the layers of a tissue should be used in a small filter. For small filter I drew 3 versions of filter covers. One is drawn with click teeth. In this version, they should not stick from the edges of the filter edge of the paper handkerchief. The second version of the cover is drawn with no teeth to click. There, the handkerchief is only placed and pushed through the filter body. The edges of the friction are cut off. The third version of the cover is drawn with a grid.
If somebody needed to put more layers through the filters that make it hard to breathe, or some more effective filter through which they also get heavier, I also drew a larger version. It's about the size of a smartphone. There I drew two versions of covers. One is classic with a large hole, and the other version is with a grid. There I did not draw any teeth to fix the filter cover to the filter body. There I assume that a paper handkerchief or other medium is placed over the edge of the filter and the residue is cut off.
The filters I drew with a relatively accurate bayonet thread of 3M, which uses half masks. I have tried to print these parts only from PLA plastic, but I assume that it will not be a problem to print them from any other available plastic. I pushed them with 0.2mm quality. The filters are optimized for printing through the PrusaSlicer last available version with a 0.4 mm nozzle. (Please note the support of the Chinese language slicer) Supports are necessary, but it is good to set the support distance from the z-axis object to 0.5 mm.
The filter body itself is well pushed in the bayonet position up.
Filter covers can be pushed from both sides at ease. Of course the version with the grid is well pushed with the grid on the bed.
In addition, these filters can also be used in industry in the dust environment. I found that they fit well into the welding mask.
If someone is willing to reward me for this set of filters, I would ask for a bitcoin wallet that is posted in the pictures.
And if you have a 3M half mask with original dust filters with dust filters and you miss the dust filter covers, here you can download and print with you - https://www.thingiverse.com/thing:3982639
the following files are available for download:
3M small filter
3M small filter cover version 1
3M small filter cover version 2
3M small filter housing with grille
3M large filter
3M large filter cover
3M large filter housing with grille