The picture below is a picture of the product we tested and a detailed picture of the test: 

Test product: watch back case

Test details of the watch back case

Watch back case air tightness testing equipment

Nowadays, more and more watches are waterproof, and products with better sealing have longer service life.Therefore, many parts of the watch that are prone to water intrusion need to be tested for waterproofing.What to do this timeTightness testis the back cover of the watch, because the waterproof level of this watch is IP68, which is the highest waterproof level. The test pressure required by the customer is as high as100kpa ,The test pressure is determined according to the waterproof level required by the product and the customer's product structure.The higher the test pressure, the higher the structural and quality requirements for the product, otherwise the product will be damaged due to excessive test pressure.

The back case of the watch is a semi-finished product. For this semi-finished product, we test it by directly inflating it.Our mold will seal this side of the watch back case with silicone.Then inflate the air into the sealed space formed by the watch back case and silicone.The instrument determines whether the product is leaking based on changes in air pressure in the space.Our air tightness testing equipment can intuitively see the value of the air pressure inside, the value of leakage, and whether the air pressure is stable.Finally, based on our set values, it directly displays whether the product is OK orNG .