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Repair and maintenance methods of pvd coating machine



Everyone knows that the pvd coating machine needs to be maintained regularly during use. With proper maintenance, the service life of the equipment will be longer. Regardless of whether you purchase an optical coating machine, a winding coating machine, or an ordinary decorative evaporation coating machine, equipment maintenance is unavoidable. So how to maintain the pvd coating machine in daily work?

pvd coating machine

1: Every time the pvd coating machine completes more than 200 coating procedures, the studio should be cleaned once.
Method: Use a saturated solution of caustic soda (NaOH) to repeatedly scrub the wall of the vacuum chamber. (Note that human skin cannot directly contact the caustic soda solution to avoid burns.) The purpose is to make the plated film material aluminum (AL) react with NaOH. After the reaction, the film layer fall off and release hydrogen gas. Then clean the vacuum chamber with clean water and clean the dirt in the fine extraction valve with a cloth dipped in gasoline.
2. When the roughing pump (slide valve pump, rotary vane pump) works continuously for one month (halved in rainy season), new oil needs to be replaced.
Method: Unscrew the oil drain bolt, drain the old oil, and then start the pump for a few seconds to completely drain the old oil in the pump. Screw back the oil drain bolt and add new oil to the rated amount (observe with the oil sight glass). After continuous use for more than half a year, when changing the oil, the oil cap should be opened and the dirt in the tank should be wiped clean with a cloth.
Three: Before restarting the pvd coating machine, pay attention to leak detection.
If the diffusion pump has been used continuously for more than 6 months, the pumping speed has obviously slowed down, or the operation has been improper. It is filled with the atmosphere. Remove the connecting water pipe, remove the electric stove plate, unscrew the first-level nozzle, and first clean the pump chamber and pump bladder with gasoline. Once, wash it again with washing powder mixed with water, and then rinse it thoroughly with clean water. After the water evaporates and dries, install the pump bladder, add new diffusion pump oil, and put it back into the body, connect the water pipes, and install the electric stove plate. You can then reboot. Before restarting, pay attention to leak detection work.
Method: Start the maintenance pump, close the door, and after a few minutes, observe whether the vacuum degree of the diffusion pump reaches 6X10 Pa, otherwise a leak detection is required. Check whether the sealing ring is installed at the joint or the sealing ring is damaged. Heating can only be done after eliminating the risk of air leakage, otherwise the diffusion pump oil will burn the ring and the pvd coating machine will not be able to enter working condition.