In the production process, due to water rinsing, cavitation and trace chemical media corrosion of the heat exchanger tube sheets, leakage often occurs in the welds of the tube sheets, resulting in mixing of water and chemical materials, and the production process temperature is difficult to control, resulting in natural Other products seriously affect product quality and reduce product grade. After the weld of the tube sheet of the condenser is leaked, it is usually repaired by the traditional repair welding method. The internal stress of the tube sheet is easy to be generated, and it is difficult to eliminate, causing leakage of other heat exchangers, and the repairing time takes a while, and After repairing, the corrosion of the tube sheet welds is repeated for several months, causing waste of manpower, material resources and financial resources.
In order to reduce the cost increase, the corrosion resistance and the rinsing resistance of the Fushui blue polymer composite material can be protected by the protection of the new heat exchanger in advance, which not only effectively controls the weld seam and blisters in the new heat exchanger. It also avoids the use of chemical substances to corrode the metal surface and solder joints of the heat exchanger. In the future regular maintenance, Fushun blue polymer composite material can also be applied to protect the exposed metal; even if leakage occurs after use, Timely repair by Fusitlan technology avoids long-term surfacing maintenance affecting production. It is precisely because of this refined treatment that the probability of leakage of heat exchangers is greatly reduced, which not only reduces the cost of equipment purchase of heat exchangers, but also ensures product quality, production time and product competitiveness.
The P10 two-color display module all uses the JX5020 driver chip from Taiwan Macroaccumulation. The LEDs of each branch are correspondingly driven by an IC pin. One IC pin drives one LED. We use static cross-current The driving method ensures that the current of each IC can be guaranteed, and the normal guarantee will not cause the entire module to heat up due to the different scanning methods, which will cause damage to the IC, and the brightness of the LED will also be similar to the static cross current. The static cross-current drive ensures the stability of the entire screen.
When all the LED display modules are tested, paste QC, pass, and then perform the first semi-finished product test aging. The longer the aging time, the better, let him exceed 24 hours as much as possible, and then we will display the display module Put on the bottom shell, ready to start pouring.
The glue is filled with a fully automatic glue filling machine. After the ab component glue is combined, the filling is carried out according to the ratio of 10:1. It is better not to lower or increase the ratio. The ratio of 10:1 is just right. , It can be surface-dried in about two hours, and it will dry out in about 4-6 hours. Such glue will have a good guarantee for long-term use.
After the module is filled with glue, place the module on a horizontal plane, and test with a level meter, and then try to make each module as flat as possible, complete the 4 corners of the horizontal position on the same level, the choice of AB glue It is also very important. The AB glue choice must use more than 40 yuan per kilogram of glue. Its adhesion and durability will be very good. It cannot be filled with shoddy glue. It will crack after a long time. The screen will leak. Then put all the display modules in their masks and arrange them to start packaging.
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Shenzhen Wide Way Optoelectronics Co., Ltd. , https://www.wdmtrafficlight.com