A method for detecting the airtightness of the partially sealed outer surface of a product

Abstract

The invention provides a gas tightness detecting method for the partially sealed outer surface of a product, which belongs to the technical field of gas tightness detection. The operation objects of the method comprise a coupling cavity, a vacuum cavity, a seal cavity and a vacuum pump. In operation, the seal cavity and the coupling cavity are arranged together at a product detection part. The seal cavity is located inside the coupling cavity. The vacuum pump provides a vacuum environment. The vacuum cavity is connected with the coupling cavity and the seal cavity, and is provided with a vacuum valve at the joint to provide a working environment for the coupling cavity and the seal cavity. The vacuum cavity, the seal cavity and the coupling cavity are provided with a vacuum gauge respectively. Vacuum pressure in the seal cavity and the coupling cavity and the time-dependent change are measured. The gas tightness of the partially sealed special-shaped outer surface of the product is calculated and tested. The method is suitable for local gas tightness testing of the product with a certain cavity volume when full-closed gas tightness detection is difficultly carried out. The method has the advantages of high detection efficiency and easy operation. Portable and rapid gas tightness detection can be carried out when the product is partially sealed and conditions are simple.

Description

technical field [0001] The invention belongs to the technical field of air tightness detection, and in particular relates to a method for detecting air tightness of a partially sealed outer surface of a product, which is used for portable and rapid detection of the air tightness of a partially sealed special-shaped surface of a product. Background technique [0002] During the storage of finished products, the sealing performance of the outer packaging of the product directly affects the reliability of the long-term storage of the product. In order to prevent the failure of the product due to air leakage from the outer packaging, product integrity (air tightness) testing is widely used in production. However, due to the limitation of technical conditions, the current integrity testing of fully-sealed products mostly uses fully-enclosed testing equipment to test the air-tightness of products, or only conducts the air-tightness testing of semi-finished product packaging, which...

AI Technical Summary

Problems solved by technology

At present, no method has been found at home and abroad that fully considers the gas leakage of the measurement method itself and is suitable for the air tightness detection method of the special-shaped surface of the finished product.

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