We all know that the vacuum coating machine needs to be regularly maintained during its use. With proper maintenance, the service life of the equipment will be longer. No matter whether you buy an optical coating machine, a winding coating machine, or an ordinary decorative evaporation coating machine, equipment maintenance is unavoidable. So how to maintain the vacuum coating machine in daily work?

        1: After the vacuum coating equipment completes more than 200 coating procedures, the studio should be cleaned once.
Method: Repeatedly scrub the inner wall of the vacuum chamber with caustic soda (NaOH) saturated solution, (note that the human skin can not directly contact the caustic soda solution to avoid burns) The purpose is to make the plated film aluminum (AL) react with NaOH, and the film layer after the reaction fall off and release hydrogen gas. Then clean the vacuum chamber with clean water and clean the dirt inside the fine extraction valve with a cloth dipped in gasoline.
       2. When the rough pump (slide valve pump, rotary vane pump) works continuously for one month (half of the rainy season), it needs to be replaced with new oil.
Method: Unscrew the oil release bolt, drain the old oil, and then start the pump for a few seconds to completely discharge the old oil in the pump. Unscrew the oil-returning bolt and add new oil to the rated amount (observed by the oil sight glass). If it has been used continuously for more than half a year, the oil cover should be opened when changing the oil, and the dirt in the box should be wiped off with a cloth.
       Three: Before reopening the vacuum coating machine, pay attention to leak detection.
If the diffusion pump has been used continuously for more than 6 months, the pumping speed is obviously slowed down, or the operation is improper. Fill the air into the atmosphere, remove the connecting water pipe, remove the electric stove, unscrew the first-level nozzle, and clean the pump cavity and pump bladder with gasoline first. Once again, wash it with washing powder mixed with water, and then wash it thoroughly with clean water. After the water has evaporated and dried, install the pump bladder, add new diffusion pump oil, and put it back into the body, connect the water pipe, and install the electric hob. to restart. Before restarting, pay attention to leak detection.
        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, perform leak detection. Check whether the sealing ring is installed at the joint, or the sealing ring is crushed. Heating can only be done after eliminating the hidden danger of air leakage, otherwise the diffusion pump oil will burn the ring, and the vacuum coating machine will not be able to enter the working state.