三防漆涂覆工藝規(guī)范a00（中英文-全文預(yù)覽
【正文】 tape or remove the fixture。When used again after dipping, It will continue to be used to remove the surface crust. When the thinner proportion less than normal, continue to use after added the appropriate thinner. ，以獲得滿意的涂覆厚度并可減少氣泡等缺陷；Dipping and taking out speed should be controlled to obtain a satisfactory coating thickness and reduce bubbles and other defects。 涂層測(cè)試厚儀測(cè)試固化后的三防漆厚度，如達(dá)到要求后方可批量噴涂；measure the thickness of coating before mass manufacture. 噴涂效果按附件標(biāo)準(zhǔn)檢驗(yàn)；Spraying effect pare with the attachment standard 手工浸涂Hand dipping 浸涂前先將涂料倒入到浸料糟中，密度計(jì)隨時(shí)監(jiān)控溶劑的損失，以保證合理的配比； Pour the coating into the sink,( the density meter to monitor the loss of the solvent, ) 按作業(yè)指導(dǎo)書要求方向?qū)CBA浸入料糟中，浸入3060秒直至氣泡消失，然后緩慢拿出，線路板表面會(huì)形成一層均勻膜層； Dip the PCBA into the sink by SOP. about 3060 seconds until the bubbles disappear, then slowly take out it, the board will coat a uniform surface layer。When brushing PCBA board put flat as possible, there should be no dropping after brushing, brushing should be even, can not have bare parts. ，所有連接器件、插座、開關(guān)、散熱器（片）、散熱區(qū)域等（不可涂三防漆元器件見附圖）是不允許刷涂三防漆的,在涂刷時(shí)需使用美紋紙遮蓋保護(hù)。 (5) Some adjustable part。 different coating use different glass rod. Label the tools for no mixed.5．3．4 掩蔽Screen： 按作業(yè)指導(dǎo)書要求用治具、膠帶遮掩印制板上不需涂覆的區(qū)域，一般掩蔽區(qū)域：(1)非密封性電位器和繼電器等元器件；(2)模塊兩側(cè)及其上不裝元器件的導(dǎo)熱板；(3)尚未安裝緊固件的固定位置；(4)連接器和跳線器；(5)零部件的可調(diào)節(jié)部分；(6)大功率電阻(2 W 以上)、大功率晶體管等元器件表面(不包括元器件的引線)，如金屬封裝DC／DC和金屬封裝繼電器；(7)其它無(wú)防護(hù)涂覆要求的部位。 C, 30 40 minutes, Coating will be better before cooling。Confirm the coating process including coating, drying temperature, drying time, tools, measuring tools. PCBA清潔、烘干：PCBA cleaning, drying 除去潮氣和水分，涂覆前必須先將要PCBA板表面的灰塵、潮氣和松香除凈，使涂料很好地粘著在線路板表面。多余的三防漆則流回容器，通過(guò)泵送到高位槽中循環(huán)使用。通常用于局部的修補(bǔ)和維修，也可用于簡(jiǎn)易產(chǎn)品生產(chǎn)，一般是涂覆質(zhì)量要求不是很高的產(chǎn)品，我司簡(jiǎn)易采品采用刷涂。Engineering Department: develop and guide the coating process, to ensure the reliability of coated products . 品質(zhì)部：對(duì)涂覆產(chǎn)品可靠性評(píng)估及監(jiān)測(cè)。 ensure the electrical excellent performance, beautiful appearance, cold resistance，thermal shock, mildew proof, damp proof, but also should have the flexibility and flame retardant 范圍scope:適用于我司手工涂覆、自動(dòng)涂覆、浸涂方式的PCBA工藝制程。Standard process requirements and quality requirements for all types of PCBA in our pany。 D department: according to the products reliability requirements select acrylic (AR), polyurethane (UR), epoxy resin (ER), silic
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