A method for testing the sealing performance of soft double-layer bottles

Abstract

The invention relates to a sealing performance determination method for a soft double-layer bottle. The method includes the following steps that: 1) a gas with air pressure P1 is blown into a bottle mouth; 2) whether the pressure value P2 of the bottle mouth reaches P3 is judged, if the pressure value P2 of the bottle mouth does not reach P3, it is determined that an inner liner is unqualified; 3) a gas is blown into the bottle mouth for time T2 and time T3 respectively, the measured pressure values of the bottle mouth are P4 and P5 respectively; 4) whether the difference value of P4 and P5 exceeds P6 is judged, if the difference value of P4 and P5 exceeds P6, it is determined that the inner liner is unqualified; 5) a gas with air pressure P7 is blown into a bottle bottom; 6) whether the pressure value P8 of the bottle mouth reaches P9 is judged, if the pressure value P8 of the bottle mouth does not reach P9, it is determined that an outer liner is unqualified; and 7) the gas with a certain pressure is relieved from the bottle bottom, and whether the pressure value P10 of the bottle mouth achieves P11 is judged, if the pressure value P10 of the bottle mouth achieves P11, it is determined that both the outer liner and inner liner are qualified, otherwise, it is determined that the inner liner is unqualified. With the sealing performance determination method of the invention adopted, the detection of the sealing performance of the inner liner and outer inner of the double-layer bottle is realized; the sealing performance of the inner liner is detected three times in a short time, and tiny holes in the shell of the inner liner can be effectively detected, and the accuracy and reliability of the test result of the sealing performance of the inner liner can be ensured.

Description

【Technical field】 [0001] The invention belongs to the technical field of container sealing performance detection, in particular to a method for detecting the sealing performance of a soft double-layer bottle. 【Background technique】 [0002] At present, in the manufacturing process of container bottles in various domestic bottle-making industries, all need to pass the leak test before leaving the factory. For the sealing performance testing of single-layer bottles, its automation equipment is widely used, but the sealing performance testing equipment for double-layer bottles is relatively rare, especially for double-layer bottles made of plastic, the inner wall of the bottle body is thin, when the internal and external pressure When there is a certain difference, the bottle shell is likely to shrink or bulge, which poses a big problem for automatic detection. In the field of biomedicine, soft double-layer bottles are widely used, and are often used to store various liquid ph...

AI Technical Summary

Problems solved by technology

For the sealing performance testing of single-layer bottles, its automation equipment is widely used, but the sealing performance testing equipment for double-layer bottles is relatively rare, especially for double-layer bottles made of plastic, the inner wall of the bottle body is thin, when the pressure inside and outside When there is a certain difference, the bottle shell is easy to shrink or bulge, which poses a big problem for automatic detection

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