Leakage detection system and method for rubber soft body with inner cavity

Abstract

The invention relates to a sealing performance detection system for a rubber soft body having an inner cavity and a method thereof. The sealing performance detection system for the rubber soft body having the inner cavity is provided with a controller, an air supply module, a material placing module, a through hole defect detection module and a non-through hole defect detection module. Whether ornot the to-be-detected rubber soft body having the inner cavity have through hole defects and / or non-through hole defects is determined according to the results about whether or not the absolute valueof the difference between a detected air pressure value and a static air pressure value is greater than a preset difference value and whether or not an air leakage air pressure value is greater thana preset rated value. According to the system and the method thereof, visible light through hole defects and non-visible light through hole defects can be simultaneously detected, the sealing performance of rubber is accurately judged, and the misjudgment rate is relatively low.

Description

technical field [0001] The invention relates to the technical field of airtightness detection, in particular to an airtightness inspection system and method for rubber soft bodies with an inner cavity. Background technique [0002] At present, rubber refers to a highly elastic polymer material with reversible deformation. It is elastic at room temperature, can produce large deformation under a small external force, and can return to its original shape after the external force is removed. Rubber is a completely amorphous polymer with a low glass transition temperature and often a large molecular weight, greater than hundreds of thousands. Early rubber was latex from plants such as rubber trees and rubber grasses, which were processed into materials that were elastic, insulating, impermeable to water and air. It is a high elastic polymer compound. Rubber is divided into two kinds of natural rubber and synthetic rubber. Natural rubber is processed by extracting gum from rubb...

AI Technical Summary

Problems solved by technology

For the existing leak detection of rubber soft body with cavity structure, most of the single-channel direct pressure detection methods are used to detect the sealability of rubber, but the single-channel direct pressure detection method is aimed at the defects of visible light and visible light through holes in rubber. For the detection of non-visible light and non-visible light through-hole defects, it cannot be detected by relying on the single-channel direct pressure detection method alone. Because the tear or scratch on the rubber is the invisible light and non-visible light through-hole defects, because The rubber is squeezed at the tear or scratch position, which cannot be identified by naked eyes alone, and the single-channel direct pressure detection method cannot detect invisible light and non-visible light through-hole defects, which is undoubtedly fatal to rubber detection. It is impossible to accurately detect whether the rubber has air leakage, that is, whether the sealing performance meets the requirements, resulting in inaccurate detection in the later stage and a considerable safety hazard

Images