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在黑白显象管生产过程中,涂膜是制屏过程中非常重要的工序,它的好坏直接影响着屏的亮度、均匀性和生产任务的正常完成。在我厂长期的生产过程中,膜不匀所占的比例仅次于掉粉。不匀的种类有泪痕状、放射状、竖条状、花斑、膜圈等等,其中膜圈在生产中时常出现,尤其是进入冬季,这种现象更为严重,占焙烧检验的10%,不匀区亮度比正常的低5～10cd/m~2,影响了亮度的均匀性,给生产造成了很大损失,为此我们进行了一系列的探讨实验,找出了产生膜圈的原因,解决了这一长期存在的问题。
In black and white picture tube production process, the film is the screen process is very important process, its quality directly affects the screen brightness, uniformity and the normal completion of production tasks. In my factory long-term production process, the proportion of film uneven second only to powder. Uneven types are tear-like, radial, vertical stripes, piebald, membrane ring, etc., of which the membrane ring often appear in the production, especially into the winter, this phenomenon is more serious, accounting for 10% of the roasting test, Uneven area brightness than the normal low 5 ~ 10cd / m ~ 2, affecting the brightness uniformity, resulting in a great loss of production, for which we conducted a series of experiments to find out the reason for the film ring , To solve this long-standing problem.