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众所周知,显象管对其内部零部件的洁净度及表面状况都有很高的要求。在电子枪的制造过程中,异物很容易沾到电极及其它部件上,比如焊接零件时产生的飞溅物、金属或非金属粉尘、纤维或碳化物微粒以及室内空气中的浮游性微小灰尘等。当这些有害物附着在零部件上或进入显象管内,会造成电极短路、寄生发射或局部打火、阴极发射不良、堵塞荫罩孔等现象,特别是会影响管子的使用寿命,从而严重影响显象管的质量。不仅对显象管如此,对其它电子管而言,电极短路和寄生发射也是影响产品质量的重要因素。因此装配成显象管之前,对电子枪进行彻底除尘是非常必要的。本文介绍
As we all know, picture tube on the internal parts of the cleanliness and surface conditions have high requirements. During the manufacture of electron guns, foreign objects easily adhere to electrodes and other components, such as splashes, metal or non-metallic dust, fiber or carbide particles, and floating fine dust in indoor air when welding parts. When these harmful substances are attached to the components or enter the picture tube, short-circuiting of the electrodes, parasitic emission or partial ignition, poor cathode emission and shadowing of the shadow mask will be caused. In particular, the service life of the tube will be seriously affected The quality of the picture tube. Not only for the CRT, for other tubes, the electrode short circuit and parasitic emission is also an important factor affecting product quality. Therefore, it is necessary to completely remove the electron gun before it is assembled into a picture tube. This article describes