Tawada PCB tana nufin allon bugawa (buga kewaye hukumar, wanda ake kira PCB) na tawada, mahimman halayen zahiri na tawada shine ɗanɗano, thixotropy, da fineness. Ana buƙatar sanin waɗannan kaddarorin na zahiri don haɓaka ikon amfani da tawada.

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Halayen ink na PCB

1. Danko da thixotropy

A cikin tsarin masana’antar keɓaɓɓen allon bugawa, bugun allo yana ɗaya daga cikin mahimman matakai masu mahimmanci. Don samun amincin haɓakar hoto, tawada dole ne ya kasance yana da ɗanɗano mai kyau da dacewa thixotropy. Abin da ake kira danko shi ne gobarar ruwa ta ciki, wanda ke nufin cewa a karkashin aikin karfi na waje, wani faifai na ruwa yana nunin faifai a kan wani ruwa na ruwa, da kuma karfin gogayyar da ke cikin ruwan cikin. M m ciki Layer zamiya ci karo da mafi girma inji juriya, thinner ruwa juriya ne kasa. Ana auna viscosity a cikin wuraren waha. Musamman, ya kamata a lura cewa zazzabi yana da tasiri mai tasiri akan danko.

Thixotropy dukiya ce ta ruwa mai ruwa, wato, danko na ruwan yana raguwa a cikin tashin hankali, kuma nan da nan ya dawo da ainihin danko bayan tsayawa. Ta hanyar motsawa, aikin thixotropic yana daɗewa don sake daidaita tsarinsa na ciki. Don cimma tasirin bugun allo mai inganci, inks thixotropy yana da matukar mahimmanci. Musamman a cikin aikin scraper, ana tawada tawada sannan ta sanya ruwa. Wannan rawar tana hanzarta tawada ta saurin saurin raga, yana haɓaka asalin layin raba tawada daidai gwargwado. Da zarar scraper ya daina motsi, tawada ta dawo cikin yanayin tsaye, kuma ɗanta ya dawo da sauri zuwa ainihin bayanan da ake buƙata.

2. Fineness

Pigments da filler na ma’adinai gabaɗaya suna da ƙarfi, ƙasa mai kyau zuwa girman barbashi wanda bai wuce 4/5 micron ba, kuma suna haifar da yanayin gudana iri ɗaya cikin madaidaicin tsari. Saboda haka, yana da matukar mahimmanci a buƙaci tawada mai kyau.

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Nau’in PCB tawada

Tawada PCB galibi ya kasu zuwa layi uku, tarewa waldi, tawada hali iri uku.

Ana amfani da tawada ta layi azaman shinge mai hana ruwa don hana lalata layin yayin da ake toshe don kare layin, gabaɗaya nau’in nau’in ruwa. Akwai nau’ikan juriya na lalata iri biyu da juriya na lalata alkaline, juriya na alkali ya fi tsada, wannan layin tawada a cikin lalata layin yana amfani da alkali don narkar da shi.

An fentin tawada Solder akan layi azaman layin kariya bayan layin. Akwai hotuna masu ruwa -ruwa da warkar da zafi, da nau’ikan taurari na ultraviolet, kiyaye kushin a kan jirgin, abubuwan haɗin waldi masu dacewa, rufi, da juriya na oxyidation.

Ana amfani da tawada harafi don yin alamar saman allo, kamar alamomin abubuwan da aka gyara, gaba ɗaya fari.

A zahiri, akwai wasu tawada, kamar tawada taushi, shine yin plating na jan ƙarfe ko farfajiya ta ƙasa baya buƙatar magance wani ɓangare na kariya, sannan ana iya tsage shi; Tawada azurfa da sauransu.

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Abubuwan amfani da tawada na PCB suna buƙatar kulawa

Dangane da ainihin ƙwarewar amfani da tawada ta yawancin masana’antun, dole ne a aiwatar da amfani da tawada daidai da tanadin da ke gaba:

1. A kowane hali, dole ne a kiyaye zafin zafin tawada a ƙasa 20-25 ℃, canjin zafin jiki ba zai yi yawa ba, in ba haka ba, zai shafi ɗanɗano tawada da ingancin bugun allo.

Musamman lokacin da aka adana tawada a waje ko adana shi a yanayin zafi daban -daban, dole ne a sanya shi a yanayin zafin yanayi don daidaitawa zuwa ‘yan kwanaki ko yin ganga tawada don cimma zafin da ya dace. Wannan saboda amfani da tawada mai sanyi zai haifar da gazawar bugun allo, yana haifar da matsala ba dole ba. Sabili da haka, don kula da ingancin tawada, yana da kyau a adana ko adana a cikin yanayin tsarin zafin jiki na al’ada.

2. Kafin amfani, tawada dole ne ta kasance cikakke kuma a hankali da hannu ko kuma ta hanyar injiniya. Idan tawada a cikin iska, yi amfani da tsayawa na ɗan lokaci. Idan ana buƙatar dilution, haɗa sosai da farko sannan gwada ɗanɗano. Dole ne a rufe ganga tawada nan da nan bayan amfani. A lokaci guda, kar a sake mayar da tawada allon a cikin ganga tawada da tawada mara amfani da aka haɗe tare.

3. Wakilin tsaftacewa wanda ya fi dacewa yin amfani da daidaitawar juna yana ɗaukar sarari mara kyau, kuma yana son tsafta sosai. Lokacin sake tsaftacewa, zai fi kyau a yi amfani da kaushi mai tsabta.

4. Bushewar tawada, dole ne ya kasance yana da kyakkyawan tsarin shaye -shaye a cikin na’urar.

5. Don kula da yanayin aiki yakamata ya cika buƙatun fasaha na wurin aiki don ayyukan buga allo.

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Menene rawar tawada PCB a cikin tsarin sarrafa PCB

Ink yana taka rawa wajen samar da kariya ta jan ƙarfe don kada fatar jan ƙarfe ta fallasa, zai shafi tsarin da ke biye, tawada mai taushi, mai carbon, mai azurfa, da mai na carbon da mai azurfa suna da haɓaka don yin, galibi ana amfani da launi tawada. , farar mai, koren mai, bakar mai, man shuɗi, jan mai, man shanu.