Umatshini wokuprinta we-Solder sisixhobo esibalulekileyo kwicandelo elingaphambili lomgca we-SMT, ngokukodwa usebenzisa i-stencil ukuprinta i-solder paste kwi-pad echaziweyo, i-solder enhle okanye embi yokuprinta i-paste, ichaphazela ngokuthe ngqo umgangatho wokugqibela we-solder.Oku kulandelayo ukucacisa ulwazi lobugcisa kumatshini woshicilelo izicwangciso parameters inkqubo.
1. Uxinzelelo lwe-squeegee.
Uxinzelelo lwe-squeegee kufuneka lusekelwe kwiimfuno zemveliso yemveliso.Uxinzelelo luncinci kakhulu, kunokubakho iimeko ezimbini: i-squeegee kwinkqubo yokuqhubela phambili amandla ehla nayo incinci, iya kubangela ukuvuza kobuninzi bokushicilela okunganeleyo;okwesibini, i-squeegee ayisondelanga kumphezulu we-stencil, ukushicilela ngenxa yobukho besithuba esincinci phakathi kwe-squeegee kunye ne-PCB, ukwandisa ubukhulu bokushicilela.Ukongeza, uxinzelelo lwe-squeegee luncinci kakhulu luya kwenza umphezulu we-stencil ukuba ushiye umaleko we-solder paste, kulula ukubangela ukuba imizobo incamathele kunye nezinye iziphene zokuprinta.Ngokuchasene noko, uxinzelelo lwe-squeegee lukhulu kakhulu luya kukhokelela ngokulula kushicilelo lwe-solder paste luncinci kakhulu, kwaye lude lonakalise i-stencil.
2. I-angle ye-scraper.
I-engile ye-Scraper idla ngokuba yi-45 ° ~ 60 °, intlama ye-solder ene-rolling elungileyo.Ubungakanani be-angle ye-scraper buchaphazela ubungakanani be-vertical force ye-scraper kwi-paste ye-solder, i-angle encinci, inkulu i-vertical force.Ngokutshintsha i-angle ye-scraper inokutshintsha uxinzelelo oluveliswa yi-scraper.
3. Ukuqina kwe-squeegee
Ubunzima be-squeegee buya kuchaphazela ubuninzi be-solder eprintiweyo.I-squeegee ethambileyo kakhulu iya kukhokelela ekuzikeni kwintlama ye-solder, ngoko ke kufuneka kusetyenziswe i-squeegee eqinile okanye i-metal squeegee, ngokubanzi kusetyenziswa i-stainless steel squeegee.
4. Isantya sokushicilela
Isantya soshicilelo siqhele ukusetwa kwi-15 ~ 100 mm / s.Ukuba isantya sicotha kakhulu, i-solder paste viscosity inkulu, akukho lula ukuphosakela ushicilelo, kwaye ichaphazela ukusebenza kakuhle koshicilelo.Isantya sikhawuleza kakhulu, i-squeegee ngexesha lokuvula itemplate lifutshane kakhulu, i-solder paste ayikwazi ukungena ngokupheleleyo ekuvuleni, kulula ukubangela ukuba i-solder paste ingagcwali okanye ukuvuza kweziphene.
5. Isikhewu sokuprinta
Umsantsa woshicilelo ubhekisa kumgama ophakathi komphezulu osezantsi westencil kunye nomphezulu wePCB, ushicilelo lwestencil lunokwahlulwa lube ziintlobo ezimbini zoshicilelo olungaqhagamshelwanga.Ushicilelo lwestencil olunomsantsa phakathi kwePCB lubizwa ngokuba yi-non-contact printing, i-gap jikelele ye-0 ~ 1.27mm, akukho ndlela yokushicilela i-gap ebizwa ngokuba yi-contact printing.Ukuprintwa koqhagamshelwano lokwahlula ngokuthe nkqo kwestencil kunokwenza umgangatho woshicilelo uchatshazelwe ngu-Z omncinci, ngakumbi kwi-pitch pitch solder paste printing.Ukuba ubukhulu be-stencil bufanelekile, ukuprintwa koqhagamshelwano kusetyenziswa ngokubanzi.
6. Ukukhutshwa kwesantya
Xa i-squeegee igqiba i-stroke yokushicilela, isantya se-stencil esishiya i-PCB sibizwa ngokuba yi-demoulding speed.Ukulungelelaniswa okufanelekileyo kwesantya sokukhululwa, ukuze i-stencil ishiye i-PCB xa kukho inkqubo yokuhlala emfutshane, ukuze i-solder paste evela kwiindawo zokuvula i-stencil ikhululwe ngokupheleleyo (demolded), ukuze ufumane i-Z best solder paste graphics.Isantya sokwahlula sePCB kunye nestencil siya kuba nefuthe elikhulu kwisiphumo soshicilelo.Ixesha lokudiliza lide kakhulu, kulula ukuya ezantsi kwi-stencil residual solder paste;ixesha lokudiliza lifutshane kakhulu, alifanelekanga kwi-solder paste ethe tye, echaphazela ukucaca kwayo.
7. Ukucoca i-stencil frequency
Ukucoca i-stencil yinto yokuqinisekisa umgangatho wokushicilela, ukucoca ezantsi kwestencil kwinkqubo yokushicilela ukuphelisa ukungcola ezantsi, okunceda ukuthintela ukungcoliswa kwe-PCB.Ukucoca ngokuqhelekileyo kwenziwa nge-ethanol ye-anhydrous njengesisombululo sokucoca.Ukuba kukho intlama ye-solder eseleyo ekuvuleni kwe-stencil ngaphambi kokuveliswa, kufuneka ihlambuluke ngaphambi kokusetyenziswa, kwaye kuqinisekiswe ukuba akukho sisombululo sokucoca sihlala, ngaphandle koko siya kuchaphazela i-soldering ye-solder paste.Ngokuqhelekileyo kuchazwe ukuba i-stencil kufuneka ihlanjululwe ngesandla nge-stencil yokusula iphepha rhoqo ngemizuzu engama-30, kwaye i-stencil kufuneka ihlambuluke nge-ultrasonic kunye notywala emva kokuvelisa ukuqinisekisa ukuba akukho ntlama ye-solder eseleyo kwindawo yokuvula i-stencil.
Ixesha lokuposa: Dec-09-2021