We have shared several cases about the sealing detection of car camera in previous articles. As for the sealing test of this kind of products, we are all used to test the shell and lens of this kind of products. If the sealing degree of the car camera is not good, it will affect the normal life and use of the product, and even lead to the equipment scrapping under special weather conditions.
This time, we will share the sealing test of car camera shell, hoping to help you.
(sealing tester for camera shell)
1、 Analysis of difficulties in the detection of car camera shell
1. The overall shell of the car camera is black square, and the shell is divided into two pieces. There are round holes in the shell, and the two sides are uneven. For the special internal structure, the shape conditions should be given priority in the detection;
2. Due to the special position of the car camera, the high-speed driving on the car will make the camera shell bear more pressure, so the detection needs to set the pressure value;
3. When testing, the small holes on the top of the product should be blocked with sealant, and the compressed gas should be filled from the small holes below to detect whether the gas will leak from the gap in the middle of the product, so as to judge the sealing performance of the product;
twoShow the sealing test process of car camera shell
1. Due to the small volume of the car camera shell and the special internal structure, we need to use a mold to assist in the detection. The mold is customized according to the whole camera shell. Before the detection, the shell is put into the mold and close to the inner wall of the mold. At the beginning of the detection, the upper and lower molds are closed to form a closed space, which is more conducive to the detection;
(sealing inspection tooling for camera shell)
2. Before testing, we need to set the parameters on the instrument. After pressing the start button, the instrument will fill the mold with dry and impurity free gas, then cut off the compressed air supply, and keep the pressure stable for a period of time. After a given measurement time, we can monitor the tiny change of gas pressure in the testing environment. The sensor transmits this information to the detection system. Finally, after a series of calculations, the leakage value of the gas can be obtained, and its sealing value can be detected according to the leakage value;
(details of tightness test of camera shell)
(parameter setting of tightness tester for camera shell)
1. If the product to be tested is unsealed and air leakage occurs, the leakage value in the instrument will be larger and larger, and the pressure value will drop. At this time, it can determine whether the car camera shell is leaking, and the instrument test results will also show ng, which means that the air tightness test fails. If there is no air leakage in the tested car camera shell, the gas in the mold will be in a constant state after inflation, the pressure value and leakage value displayed on the instrument are also stable, and the test result of the instrument will display the word OK, indicating that the tightness test has passed.
1、 Parameters of tightness tester for car camera shell
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