Leak detection is a guarantee plastic part decorative film coating machine
A method of vacuum plating, referred to as leak detection. The unevenness of the vacuum directly affects the coating effect, so leak detection is very important. In the process of leak detection, to do a good job of leak detection, some problems need to be paid attention to.
1. It must be admitted that the air leakage is a virtual leak or a real leak, because after the workpiece data is heated, gas will occur to different degrees, and you may mistake it for the gas flowing in from the outside, which is a virtual leak. This situation should be eliminated.
2. Test the air-sealing function of the vacuum chamber to ensure that the air-sealing function meets the requirements.
3. Check the size, shape, orientation and speed of the leak, formulate a treatment plan and implement it.
4. Determine the minimum leak detection rate and sensitivity of the testing instrument to detect leaks in a wide range, prevent some leaks from being ignored, and improve the accuracy of leak detection.
5. Master the reaction time and elimination time of the leak detector, take good care of the time, and ensure that the leak detector is in place. If the time is short, the leak detection effect will definitely be poor. If it takes a long time, the gas fee and labor electricity fee for leak detection will be wasted.
6. Also prevent leakage and blockage. Sometimes during the leak detection process, due to improper operation, some dust or liquid blocked the leak, and it is considered that there is no leak in this direction. However, when the leakage is not blocked due to the internal and external pressure difference or other reasons, the leakage still exists.
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