三防漆涂覆工艺规范a00中英文内容摘要:

和金属封装继电器;(7)其它无防护涂覆要求的部位。 According to SOP, cover tape coated some area on surface of the PCB. (1) Non sealing potentiometer and a relay(2) on both sides of the module and its ponents are not installed thermal plate。 (3)the area has not been installed fasteners parts。 (4) connectors and jumpers。 (5) Some adjustable part。 (6) The surface of big power resistor (2 W or more), high power transistor (7) other area.5.3.5 涂覆Coating: 手工刷涂hand brush   ,将涂料倒入容器内,然后用毛刷粘适当胶液对线路板进行均匀刷涂(采用十字交叉法)。 By the size and layout of product rightly choice brush, paint into the container, then apply with a brush evenly. (using the cross method).  ,以保证全部覆盖器件和焊盘。 Brush area should be large than the area of ponent, in order to cover and copper pad fully.   ,刷涂后不应有滴露,刷涂应平整,也不能有裸露的部分。 When brushing PCBA board put flat as possible, there should be no dropping after brushing, brushing should be even, can not have bare parts.   ,所有连接器件、插座、开关、散热器(片)、散热区域等(不可涂三防漆元器件见附图)是不允许刷涂三防漆的,在涂刷时需使用美纹纸遮盖保护。 All connected devices, sockets, switches, radiators (film), cooling area (see illustration) is not allowed brushing. It need to use tape for protection.  ,可通过涂两层较薄的涂层来获得(要求必须在第一层完全晾干后才允许涂上第二层)。 If you want to get a thicker coating, we can coat two times (After first layer dry pletely.). 自检涂刷均匀后,将PCBA放入调控好温度、链速的烘干炉内固化。 After selfinspection let it pass through drying oven which in good condition of temperature and chain speed spraying 按产品选择对应的载具,并将其PCBA装置好后放入涂覆导轨进板口; Select the corresponding transport fixture, and put the it into the entrance of oven. 对照《涂覆机操作规范》进行相关的涂覆操作;Operate by SOP 从程序中调用对应机型的程序,试喷35PCS,Call the corresponding program .try spraying 35PCS,。 涂层测试厚仪测试固化后的三防漆厚度,如达到要求后方可批量喷涂;measure the thickness of coating before mass manufacture. 喷涂效果按附件标准检验;Spraying effect pare with the attachment standard 手工浸涂Hand dipping 浸涂前先将涂料倒入到浸料糟中,密度计随时监控溶剂的损失,以保证合理的配比; Pour the coating into the sink,( the density meter to monitor the loss of the solvent, ) 按作业指导书要求方向将PCBA浸入料糟中,浸入3060秒直至气泡消失,然后缓慢拿出,线路板表面会形成一层均匀膜层; 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。 ,以免影响材料的点结力;应选择无残胶而且防静电的遮盖胶带,如果选择普通胶带,则必须使用去离子风机;Operating Should be at a clean e。
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