Muzochitika zonse zopanga zamakono PCB, inki yakhala imodzi mwazinthu zofunikira kwambiri popanga ma PCB opanga mafakitale a PCB. Iwo ali ndi udindo wofunika kwambiri mu zipangizo PCB ndondomeko. Kupambana kapena kulephera kwa ntchito kwa inki kumakhudza mwachindunji zofunikira zonse zaumisiri ndi zizindikiro zamtundu wa kutumiza kwa PCB. Pachifukwa ichi, opanga PCB amaphatikiza kufunikira kwakukulu pakuchita kwa inki. Kuphatikiza pa kukhuthala kodziwika bwino kwa inki, thixotropy ngati inki nthawi zambiri anthu amanyalanyaza. Koma imakhala ndi gawo lofunikira kwambiri pakuwongolera kusindikiza pazenera.

Pansipa tikuwunika ndikuwunika mphamvu ya thixotropy mu dongosolo la PCB pakuchita kwa inki:

1. Sewero

Chophimba cha silika ndi chimodzi mwazinthu zofunika kwambiri pakusindikiza pazenera. Popanda chophimba, sikungatchulidwe kusindikiza chophimba. Kusindikiza pazenera ndi moyo waukadaulo wosindikizira pazenera. Zowonetsera zimakhala pafupifupi nsalu zonse za silika (zowona palinso nsalu zopanda silika).

M’makampani a PCB, omwe amagwiritsidwa ntchito kwambiri ndi ukonde wamtundu wa t. ma netiweki amtundu wa s ndi HD nthawi zambiri sagwiritsidwa ntchito pokhapokha pazosowa zapadera.

2. Inki

Amatanthauza zinthu zamtundu wa gelatinous zomwe zimagwiritsidwa ntchito pamatabwa osindikizidwa. Nthawi zambiri amapangidwa ndi ma resins opangira, zosungunulira zosasinthika, mafuta ndi zodzaza, ma desiccants, ma pigment ndi diluents. Nthawi zambiri amatchedwa inki.

Atatu. Angapo zofunika luso katundu PCB inki

Kaya khalidwe la inki PCB zabwino kwambiri, kwenikweni, n’zosatheka kusiya kuphatikiza zigawo zikuluzikulu pamwamba. Ubwino wabwino wa inki ndi chiwonetsero chokwanira cha sayansi, kupita patsogolo komanso kuteteza chilengedwe. Zimawonetsedwa mu:

(1) Viscosity: mwachidule kukhuthala kwamphamvu. Kawirikawiri amasonyezedwa ndi mamasukidwe akayendedwe, ndiko kuti, kukameta ubweya wa kumeta ubweya wa madzimadzi ogawanika ndi liwiro la gradient kumalo othamanga, gulu lapadziko lonse ndi Pa/sec (pa.s) kapena milliPascal/sec (mpa.s). Mu kupanga PCB, amatanthauza fluidity inki opangidwa ndi mphamvu kunja.

(2) Pulasitiki: Inkiyo ikapunduka ndi mphamvu yakunja, imasungabe zinthu zake zisanachitike. Pulasitiki ya inki imathandizira kuwongolera kulondola kosindikiza;

(3) Thixotropic: (thixotropic) Inki ndi gelatinous ikasiyidwa, ndipo mawonekedwe a viscosity amasintha akakhudza. Amatchedwanso thixotropic ndi sag resistance;

(4) Fluidity: (leveling) momwe inki imafalikira mozungulira ndi mphamvu yakunja. Fluidity ndi kubwereza kwa mamasukidwe akayendedwe, ndipo fluidity imagwirizana ndi pulasitiki ndi thixotropy wa inki. Mapulasitiki ndi thixotropy ndi aakulu, fluidity ndi yaikulu; fluidity ndi yaikulu, chizindikirocho ndi chosavuta kuwonjezera. Ndi madzi otsika, amatha kupanga mapangidwe a maukonde, zomwe zimapangitsa kupanga inki, yomwe imatchedwanso reticulation;

(5) Viscoelasticity: kumatanthauza kuthekera kwa inki yomwe imametedwa ndi kusweka inkiyo ikasulidwa ndi squeegee kuti ibwererenso mwachangu. Pamafunika kuti inki deformation liwiro mofulumira ndi inki rebounds mwamsanga kukhala opindulitsa kusindikiza;

(6) Kuuma: kuchedwetsa kuyanika kwa inki pazenera, kumakhala bwinoko, komanso kufulumira kwa inkiyo ikasamutsidwa ku gawo lapansi;

(7) Fineness: kukula kwa pigment ndi olimba zinthu particles, PCB inki zambiri zosakwana 10μm, ndi kukula kwa fineness ayenera kukhala osachepera gawo limodzi mwa magawo atatu a kutsegula mauna;

(8) Kukanika: Inki ikanyamulidwa ndi fosholo ya inki, mlingo wa inki wonga silika ukatambasula umatchedwa kuti zingwe. Ulusi wa inki ndi wautali, ndipo pali ulusi wambiri pamtunda wa inki ndi malo osindikizira, kupangitsa gawo lapansi ndi mbale yosindikizira kukhala zodetsedwa, kapena kulephera kusindikiza;

(9) Transparency ndi kubisala mphamvu ya inki: Pakuti PCB inki, zofunika zosiyanasiyana zimaperekedwa kwa kuwonekera ndi kubisa mphamvu ya inki malinga ndi ntchito zosiyanasiyana ndi zofunika. Nthawi zambiri, ma inki ozungulira, ma inki oyendetsa ndi ma inki amafunikira mphamvu zobisalira. Kukana kwa solder kumakhala kosavuta.

(10) Chemical kukana inki: PCB inki ali mfundo okhwima asidi, zamchere, mchere ndi zosungunulira malinga ndi zolinga zosiyanasiyana;

(11) kukana thupi la inki: PCB inki ayenera kukumana kukana zikande kunja, kukana matenthedwe mantha, makina peel kukana, ndi kukwaniritsa zosiyanasiyana okhwima magetsi ntchito zofunika;

(12) Chitetezo ndi chitetezo cha chilengedwe cha inki: Inki ya PCB imayenera kukhala yopanda poizoni, yopanda fungo, yotetezeka komanso yosamalira chilengedwe.

Pamwambapa tafotokoza mwachidule za ma inki khumi ndi awiri a PCB. Pakati pawo, mu ntchito yeniyeni ya kusindikiza chophimba, vuto la mamasukidwe akayendedwe limagwirizana kwambiri ndi woyendetsa. Kukhuthala kwake ndikofunikira kwambiri pakusalala kwa chophimba cha silika. Choncho, mu PCB inki zikalata luso ndi malipoti qc, mamasukidwe akayendedwe amalembedwa momveka bwino, kusonyeza pansi pa zinthu ndi mtundu wanji kukhuthala kuyesa chida ntchito. Mu ndondomeko yeniyeni yosindikizira, ngati kukhuthala kwa inki ndikwambiri, zidzakhala zovuta kusindikiza, ndipo m’mphepete mwazithunzizo zidzakhala zovuta kwambiri. Pofuna kupititsa patsogolo kusindikiza, chowonda chidzawonjezedwa kuti chiwongolero cha viscosity chikwaniritse zofunikira. Koma sikovuta kupeza kuti nthawi zambiri, kuti mupeze chisankho choyenera (chigamulo), ziribe kanthu momwe mumagwiritsa ntchito mamasukidwe amtundu wanji, sikutheka kukwaniritsa. Chifukwa chiyani? Nditafufuza mozama, ndinapeza kuti kukhuthala kwa inki ndi chinthu chofunikira, koma osati chokhacho. Palinso chinthu china chofunika kwambiri: thixotropy. Zikukhudzanso kulondola kwa zosindikiza.

Zinayi. Thixotropy

Viscosity ndi thixotropy ndi malingaliro awiri osiyana thupi. Zitha kumveka kuti thixotropy ndi chizindikiro cha kusintha kwa makatoni a inki.

Pamene inki ili pa kutentha kwina kosalekeza, poganiza kuti zosungunulira mu inki sizimasungunuka mwamsanga, kukhuthala kwa inki sikudzasintha panthawiyi. The mamasukidwe akayendedwe alibe chochita ndi nthawi. The mamasukidwe akayendedwe si variable, koma mosalekeza.

Pamene inki imayikidwa ku mphamvu yakunja (kugwedeza), kukhuthala kumasintha. Pamene mphamvu ikupitirirabe, kukhuthala kumapitirirabe kuchepa, koma sikudzagwa mpaka kalekale, ndikuyima ikafika malire ena. Mphamvu yakunja ikatha, pakatha nthawi yoyima, inkiyo imatha kubwereranso ku chikhalidwe choyambirira. Timatcha mtundu uwu wa zinthu zosinthika zakuthupi kuti kukhuthala kwa inki kumachepa ndi kukulitsa nthawi pansi pa mphamvu yakunja, koma mphamvu yakunja ikatha, imatha kubwereranso kukhuthala koyambirira monga thixotropy. Thixotropy ndi nthawi yosinthika yokhudzana ndi nthawi pansi pa zochita za mphamvu yakunja.

Pansi pa zochita za mphamvu zakunja, kufupikitsa nthawi ya mphamvu, ndi kuchepa koonekeratu kwa viscosity, timatcha inki iyi thixotropy ndi yaikulu; m’malo mwake, ngati kutsika kwa viscosity sikudziwika, kumanenedwa kuti thixotropy ndi yaying’ono.

5. Njira yochitira zinthu ndikuwongolera inki thixotropy

Kodi thixotropy ndi chiyani kwenikweni? Chifukwa chiyani kukhuthala kwa inki kumachepetsedwa pansi pa mphamvu yakunja, koma mphamvu yakunja imatha, pakapita nthawi, kukhuthala koyambirira kumatha kubwezeretsedwanso?

Kudziwa ngati inki ali ndi zofunika zinthu thixotropy, choyamba ndi utomoni ndi mamasukidwe akayendedwe, ndiyeno wodzazidwa ndi wina buku chiŵerengero cha filler ndi pigment particles. Pambuyo pa utomoni, zodzaza, ma pigment, zowonjezera, ndi zina zotero. Iwo ndi osakaniza. Popanda kutentha kwakunja kapena mphamvu ya kuwala kwa ultraviolet, amakhalapo ngati gulu la ayoni losakhazikika. Pazikhalidwe zabwinobwino, amakonzedwa mwadongosolo chifukwa chokopana, kuwonetsa kukhuthala kwakukulu, koma palibe zomwe zimachitika. Ndipo ikakhala pansi pa mphamvu yamakina akunja, dongosolo lokonzekera loyambirira limasokonekera, unyolo wokokerana umadulidwa, ndipo umakhala wosokonezeka, kuwonetsa kuti mamasukidwe amphamvu amakhala otsika. Ichi ndi chodabwitsa chomwe nthawi zambiri timachiwona inki kuyambira wandiweyani mpaka woonda. Titha kugwiritsa ntchito chotseka chotseka chosinthira chojambula chotsatira kuti tifotokoze momveka bwino njira yonse ya thixotropy.

Sizovuta kupeza kuti kuchuluka kwa zolimba mu inki ndi mawonekedwe ndi kukula kwa zolimba zidzatsimikizira thixotropic katundu wa inki. Inde, palibe thixotropy kwa zakumwa kuti mwachibadwa otsika kwambiri mamasukidwe akayendedwe. Komabe, kuti apange inki thixotropic, ndi mwaukadaulo zotheka kuwonjezera wothandizira wothandiza kusintha ndi kuonjezera mamasukidwe akayendedwe a inki, kupanga thixotropic. Zowonjezera izi zimatchedwa wothandizira thixotropic. Choncho, thixotropy wa inki ndi controllable.

Zisanu ndi chimodzi. Kugwiritsa ntchito thixotropy

Muzochita zogwiritsidwa ntchito, sizomwe zimakhala zazikulu za thixotropy, zabwino, kapena zazing’ono zimakhala bwino. Ndi zokwanira basi. Chifukwa cha thixotropic katundu, inki ndi oyenera kwambiri ndondomeko yosindikizira chophimba. Imapangitsa ntchito yosindikiza pazenera kukhala yosavuta komanso yaulere. Panthawi yosindikiza chophimba cha inki, inki paukonde imakankhidwa ndi squeegee, kugudubuza ndi kufinya kumachitika, ndipo kukhuthala kwa inki kumakhala kotsika, zomwe zimathandiza kuti inki ilowe. Pambuyo inki ndi zenera kusindikizidwa pa gawo lapansi PCB, chifukwa mamasukidwe akayendedwe sangathe anachira mwamsanga, pali yoyenera kusanja danga kuti inki kuyenda pang’onopang’ono, ndipo pamene bwino kubwezeretsedwa, m’mbali mwa chinsalu kusindikizidwa zithunzi adzapeza zokhutiritsa. kusalala.