Ngaba amanzi angavuza nge-silicone?

 

Amanzi Alulwelo vs. Umphunga Wamanzi: “Ukuvuza” Okubini Okwahlukileyo

1) Ukuvuza kwamanzi olwelo

I-silicone esetyenziswe kakuhle idla ngokuvala amanzi amdaka ngokufanelekileyo. Kwiimeko ezininzi zokusilela kwehlabathi lokwenyani, amanzi angena ngenxa yezi zinto zilandelayo:

• Ukugqunywa kweentsimbi okungaphelelanga okanye amabala amancinci
• Ukulungiswa komphezulu okungalunganga (ioyile, uthuli, izinto ezikhupha izinto)
• Intshukumo eyaphula umgca wokubopha
• Amaqamza omoya, imingxunya, okanye imifantu ngenxa yokungalungiswa kakuhle
• I-chemistry ye-silicone engalunganga kwi-substrate (ukunamathela okuphantsi)

I-silicone bead eqhubekayo nebotshelelwe kakuhle inokumelana nokuchaphaza, imvula, kwanokuntywiliselwa okwethutyana kuxhomekeke kuyilo, ubukhulu, kunye nejiyometri yamalungu.

2) Ukuntywiliselwa komphunga wamanzi

Nokuba i-silicone ayiphelelanga, ii-silicone elastomers ezininzi zivumela ukusasazeka kancinci komphunga wamanzi. Oku akubonakali ngathi “kuvuza” njengomngxuma—kufana nokufuma okuhamba kancinci kancinci kwi-membrane.

Ukukhusela izixhobo ze-elektroniki, loo mahluko ubalulekile: i-PCB yakho isenokubona ukuchatshazelwa kukufuma kangangeenyanga/iminyaka ukuba i-silicone encapsulant iyakwazi ukungena ngomphunga, nokuba ivala amanzi angamanzi.

Kutheni iSilicone isetyenziswa njenge-Encapsulant

A isigqubuthelo sesiliconeayikhethwanga nje kuphela ngenxa yokuthintela amanzi, kodwa ngenxa yokuthembeka kwayo yonke:

• Ubushushu benkonzo ebanzi:iisilicone ezininzi zisebenza phantse ukusuka-50°C ukuya ku +200°C, kunye namanqaku akhethekileyo aphezulu.
• Ukuguquguquka kunye nokunciphisa uxinzelelo:i-modulus ephantsi inceda ukukhusela amalungu e-solder kunye nezinto ezisetyenziswayo ngexesha lokujikeleza kobushushu.
• Ukumelana ne-UV kunye nemozulu:i-silicone ihlala kakuhle ngaphandle xa ithelekiswa nee-polymers ezininzi zendalo.
• Ubushushu bombane:ukusebenza kakuhle kwe-dielectric kuxhasa uyilo lwe-elektroniki olune-voltage ephezulu kunye nolunobuthathaka.

Ngamanye amazwi, i-silicone idla ngokuphucula ukuqina kwexesha elide nokuba "umqobo ogqibeleleyo wokufuma" awungowona njongo iphambili.

Yintoni egqiba ukuba amanzi adlula kwi-silicone?

1) Umgangatho wokuphilisa kunye nobukhulu

Ukwaleka okubhityileyo kulula ukuba umphunga wamanzi ungene, kwaye amabala abhityileyo kulula ukuwafaka amabala. Ukuze kuvalwe, ubukhulu obuhambelanayo bubalulekile. Ukuze kufakwe/kufakwe i-capsulation, ukwanda kobukhulu kunokucothisa ukuhanjiswa komswakama kwaye kuphucule ukhuseleko loomatshini.

2) Ukunamathela kwisiseko

I-silicone inokunamathela ngokuqinileyo, kodwa inganamatheli ngokuzenzekelayo. Iintsimbi, iiplastiki, kunye neendawo ezigqunyiweyo zinokufuna:

• Ukusula/ukususa amafutha kwisinyibilikisi
• Ukukrala (apho kufanelekileyo)
• I-primer eyenzelwe ukubopha i-silicone

Kwimveliso, ukusilela kokunamathela sesona sizathu siphambili "sokuvuza," nokuba i-silicone ngokwayo ilungile.

3) Ukukhetha izinto: i-RTV vs. ukongezwa-unyango, ukuzaliswa vs. okungazaliswanga

Ayizizo zonke ii-silicone eziziphatha ngendlela efanayo. Ukwenziwa kwe-formulation kuchaphazela oku kulandelayo:

• Ukuncipha xa kunyangwa (ukuncipha okuphantsi kunciphisa izikhewu ezincinci)
• Imodulus (ukuguqa ngokuchasene nokuqina)
• Ukumelana neekhemikhali
• Izinga lokusasazeka komswakama

Ezinye ii-silicone ezizalisiweyo kunye neefomyula ezikhethekileyo eziphuculweyo zinciphisa ukungena kwamanzi xa kuthelekiswa nee-silicone eziqhelekileyo neziphefumla kakhulu.

4) Uyilo kunye nentshukumo edibeneyo

Ukuba indibano iyakhula/iyancipha, isitywini kufuneka sivumelane nentshukumo ngaphandle kokuxobuka. Ukuqina kwesilicone yeyona nzuzo inkulu apha, kodwa kuphela ukuba uyilo lwejoyinti lubonelela ngendawo efanelekileyo yokubopha kwaye luphepha iikona ezibukhali ezigxininisa uxinzelelo.

Isikhokelo Esisebenzayo: Xa I-Silicone Yanele—Naxa Ingekho

I-silicone idla ngokuba lukhetho oluhle xa ufuna:

• Ukuvalwa kwemozulu yangaphandle (imvula, ukutshiza)
• Ukumelana nokungcangcazela/nobushushu bokujikeleza
• Ubushushu bombane obune-cushioning yoomatshini

Cinga ngezinye iindlela okanye ezinye izithintelo xa ufuna:

• Ukuthintela ixesha elide ukungena komswakama kwii-elektroniki ezibuthathaka
• Ukutywinwa "okungatshiyo" ngokwenene (i-silicone ayitshiyo)
• Ukuntywiliselwa okuqhubekayo kunye noxinzelelo oluhlukeneyo

Kwezi meko, iinjineli zihlala zidibanisa amaqhinga: i-silicone encapsulant yokuphelisa uxinzelelo + i-housing gasket + i-conformal coating + i-desiccant okanye i-vent membrane, kuxhomekeke kwimeko-bume.

Okukwintsusa

Amanzi adla ngokungavuzingokusebenzisai-silicone elungisiweyo njengolwelo—iingxaki ezininzi zivela ekunamatheleni kakubi, izikhewu, okanye iziphene. Kodwa umphunga wamanzi unokungena kwi-silicone, yiyo loo nto "ingangeni manzi" kunye "nengangeni manzi" zingasoloko zifana kukhuseleko lwe-elektroniki. Ukuba undixelela imeko yakho yokusebenzisa (indawo evalekileyo yangaphandle, i-PCB potting, ubunzulu bokuntywiliselwa, uluhlu lobushushu), ndingacebisa uhlobo olufanelekileyo lwe-silicone encapsulant, ubukhulu bethagethi, kunye novavanyo lokuqinisekisa (uvavanyo lwe-IP, uvavanyo lokuntywila, ukujikeleza kobushushu) ukuze kuhambelane neenjongo zakho zokuthembeka.