Ingabe amanzi angavuza nge-silicone?

 

Amanzi Amanzi vs. Umhwamuko Wamanzi: “Ukuvuza” Okubili Okuhlukene

1) Ukuvuza kwamanzi oketshezi

I-silicone esetshenziswe kahle ivame ukuvimba amanzi acwebezelayo ngempumelelo. Ezimweni eziningi zokwehluleka kwezwe langempela, amanzi ayangena ngenxa yalokhu:

• Ukumbozwa kobuhlalu okungaphelele noma izindawo ezincane
• Ukulungiswa okungekuhle kwendawo (uwoyela, uthuli, izinto zokukhipha)
• Ukunyakaza okuphula umugqa wesibopho
• Amabhamuza omoya, izikhala, noma imifantu ngenxa yokulungiswa okungafanele
• I-chemistry ye-silicone engalungile ye-substrate (ukunamathela okuphansi)

I-silicone bead eqhubekayo, eboshwe kahle ingamelana nokuchaphazeka, imvula, ngisho nokucwiliswa isikhathi esifushane kuye ngomklamo, ukujiya, kanye nokwakheka kwamalunga.

2) Ukugeleza komhwamuko wamanzi

Ngisho noma i-silicone ingashintshi, ama-elastomer amaningi e-silicone avumela ukusabalala kancane komhwamuko wamanzi. Lokhu akusikho “ukuvuza” okubonakalayo njengomgodi—kufana nomswakama ohamba kancane kancane nge-membrane.

Ukuze kuvikelwe nge-elekthronikhi, lowo mehluko ubalulekile: i-PCB yakho ingase isabona ukuchayeka komswakama izinyanga/iminyaka uma i-silicone encapsulant ingangeniswa umhwamuko, noma ngabe ivimba amanzi acwebezelayo.

Kungani i-Silicone isetshenziswa njenge-Encapsulant

A isivikelo se-siliconeAkukhethelwanga nje kuphela ukuvimbela amanzi, kodwa nokuthembeka okuphelele:

• Izinga lokushisa elibanzi lesevisi:ama-silicone amaningi asebenza cishe kusukela-50°C kuya ku-+200°C, ngamamaki akhethekile aphezulu.
• Ukuguquguquka kanye nokukhululeka ekucindezelekeni:i-modulus ephansi isiza ukuvikela amalunga e-solder kanye nezingxenye ngesikhathi sokujikeleza kokushisa.
• Ukumelana ne-UV nesimo sezulu:i-silicone ibambelela kahle ngaphandle uma iqhathaniswa nama-polymer amaningi e-organic.
• Ukushisa ngogesi:ukusebenza kahle kwe-dielectric kusekela imiklamo ye-elekthronikhi enamandla aphezulu futhi ebucayi.

Ngamanye amazwi, i-silicone ivame ukuthuthukisa ukuqina kwesikhathi eside ngisho noma "isithiyo somswakama esiphelele" singeyona inhloso eyinhloko.

Yini Enquma Ukuthi Amanzi Adlula Ku-Silicone?

1) Ikhwalithi yokwelapha kanye nobukhulu

Ukwembozwa okuncane kulula ukuthi umhwamuko wamanzi ungene, kanti ubuhlalu obuncane kulula ukubufaka esikhumbeni. Ukuze kuvalwe, ukujiya okulinganayo kubalulekile. Ukuze kufakwe/kufakwe esikhumbeni, ukujiya okwandisiwe kunganciphisa ukudluliselwa komswakama futhi kuthuthukise ukuvikelwa kwemishini.

2) Ukunamathela ku-substrate

I-silicone inganamathela ngokuqinile, kodwa hhayi ngokuzenzakalelayo. Izinsimbi, ipulasitiki, kanye nezindawo ezimboziwe kungadinga:

• Ukusula/ukususa amafutha okunyibilikisa
• Ukuguguleka (lapho kufanele khona)
• I-primer eyenzelwe ukubopha i-silicone

Ekukhiqizeni, ukwehluleka kokunamathela kuyimbangela ephezulu "yokuvuza," noma ngabe i-silicone ngokwayo ilungile.

3) Ukukhetha izinto: i-RTV vs. ukwengeza-ukwelapha, okugcwalisiwe vs. okungagcwalisiwe

Akuwona wonke ama-silicone aziphatha ngendlela efanayo. Ukwakheka kuthinta:

• Ukuncipha lapho kuphulukiswa (ukuncipha okuphansi kunciphisa izikhala ezincane)
• I-Modulus (ukuguquguquka vs. ukuqina)
• Ukumelana namakhemikhali
• Izinga lokusabalala komswakama

Amanye ama-silicone agcwele kanye nezindlela ezikhethekile ezithuthukisiwe zezithiyo zinciphisa ukungena kwamanzi uma kuqhathaniswa nama-silicone ajwayelekile, aphefumula kalula.

4) Umklamo kanye nokunyakaza okuhlangene

Uma i-assembly ikhula/incipha, uphawu kumele luvumelane nokunyakaza ngaphandle kokuxebuka. Ukuqina kwe-silicone kuyinzuzo enkulu lapha, kodwa kuphela uma ukwakheka kwe-joint kunikeza indawo eyanele yokubopha futhi kugwema amakhona abukhali agxilisa ukucindezeleka.

Isiqondiso Esiwusizo: Lapho I-Silicone Yanele—Nalapho Inganele

I-silicone ngokuvamile iyisinqumo esihle uma udinga:

• Ukuvalwa kwesimo sezulu sangaphandle (imvula, ukuchaphaza)
• Ukumelana nokudlidliza/nokushisa komjikelezo
• Ukushisa ngogesi okune-cushioning yemishini

Cabanga ngezinye izindlela noma ezinye izithiyo uma udinga:

• Ukuvimbela isikhathi eside ukungena komswakama kuma-elekthronikhi abucayi
• Ukuvalwa kweqiniso "okungangenisi umoya" (i-silicone ayingenisi umoya)
• Ukucwiliswa okuqhubekayo okunomehluko wengcindezi

Kulezi zimo, onjiniyela bavame ukuhlanganisa amasu: i-silicone encapsulant yokuqeda ukucindezeleka + i-housing gasket + i-conformal coating + i-desiccant noma i-vent membrane, kuye ngendawo ezungezile.

Umugqa Ophansi

Amanzi ngokuvamile awavuzingokusebenzisai-silicone elungisiwe njengoketshezi—izinkinga eziningi zivela ekunamatheleni okubi, izikhala, noma amaphutha. Kodwa umhwamuko wamanzi ungangena nge-silicone, yingakho “ingangeni manzi” kanye “nengangeni umswakama” kungafani ngaso sonke isikhathi ekuvikelweni kwe-elekthronikhi. Uma ungitshela ibhokisi lakho lokusebenzisa (indawo evalekile yangaphandle, i-PCB potting, ukujula kokucwiliswa, ububanzi bokushisa), ngingancoma uhlobo olufanele lwe-silicone encapsulant, ukujiya okuqondiwe, kanye nokuhlolwa kokuqinisekisa (isilinganiso se-IP, ukuhlolwa kokucwiliswa, ukujikeleza kokushisa) ukuze kuhambisane nemigomo yakho yokuthembeka.