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As we all know, the vacuum coating machine should be maintained regularly during its use. If it is properly maintained, the service life of the equipment will be longer. No matter whether you buy an optical coating machine, a winding coating machine or a common decorative evaporation coating machine, equipment maintenance is inevitable. So how to maintain the vacuum coating machine in daily work?
1. The vacuum coating equipment should clean the studio once every time more than 200 coating procedures are completed.
Methods: Scrub the inner wall of vacuum chamber repeatedly with saturated solution of caustic soda (NaOH) (pay attention to the fact that human skin can't directly contact with caustic soda solution to avoid burns). The purpose is to make the plated aluminum (AL) react with NaOH, and after the reaction, the film will fall off and release hydrogen. Then clean the vacuum chamber with clean water and clean the dirt in the fine pumping valve with cloth dipped in gasoline.
Second, when the rough pump (slide valve pump, rotary vane pump) works continuously for one month (halved in rainy season), new oil needs to be replaced.
Methods: Unscrew the oil bolt, drain the old oil, and then start the pump for several seconds to completely drain the old oil in the pump. Screw back the oil bolt and add new oil to the rated amount (observe with oil mirror). After being used for more than half a year in a row, the oil cover should be opened when changing oil, and the dirt in the box should be wiped with cloth.
Three: Pay attention to leak detection before restarting the vacuum coating machine. After the diffusion pump has been used continuously for more than 6 months, the pumping speed obviously slows down, or the operation is improper. Fill it into the atmosphere, remove the connecting water pipe, remove the electric stove plate, screw out the primary nozzle, clean the pump cavity and the pump liner with gasoline first, then wash it with washing powder mixed with water, and then thoroughly clean it with clean water. After the water evaporates, install the pump liner, add new diffusion pump oil, and put it back into the body, connect the water pipe and install the electric stove plate. Pay attention to leak detection before restarting the machine.
Methods: Start the maintenance pump, close the door, and after a few minutes, observe whether the partial vacuum degree of the diffusion pump reaches 6X10 Pa, otherwise, leak detection is required. Check whether the sealing rubber ring is installed at the joint or the sealing ring is crushed. Do not heat it until the hidden trouble of air leakage is eliminated, otherwise the diffusion pump oil will burn the ring, and the vacuum coating equipment will not work.
