There are two main aspects to the buckle during the test:
One is the pull test, which is mainly to test the bearing capacity of the buckle. It is divided into two steps to complete:
1. Instant pull test, mainly used for buckles, D buckles, and daily buckles. When the test suddenly encounters strong tension, the strength of the buckle.
2, the long-lasting tensile test, its main principle is to determine the weight of the load, the time value of the buckle.
3, on the buckle is also the use of the number of detection, non-stop opening and closing, to test how many times, the buckle will be deformed.
Three-way, or multi-directional buckle detection is more complicated.
The second is the temperature test. This is mainly to test the bearing capacity of the buckle under unconventional temperature. It is divided into high temperature and low temperature.
1, the high temperature is usually set at 70 degrees Celsius
2, the low temperature is usually set at minus 30 degrees
The time is 24 hours and then the change in intensity is tested.
The third is the salt spray test. This test is mainly to monitor the salt resistance of the buckle. Some products can only be transported by sea, and the long-term operation of the sea will affect the quality of the product. This test is also divided into two steps.
1. Soak the buckle in sea water for 72 hours.
2, put the soaked buckle in the sun for 5-7 days
3. Has the test intensity changed too much after the completion?
There are also some anti-acid tests, etc., which can be tested according to different needs and materials. The metal fasteners are also tested for rust, corrosion and chemical resistance. If the fasteners are processed after the product, such as electroplating, water dyeing, smearing, etc., it is necessary to further test whether these additional processes are qualified.
Of course, there are higher standard tests for extreme sports such as diving. What UL certification, TS16949 certification, and VDA6.0 standards are not acceptable to general fastener manufacturers.