The challenge

In the production of glass containers it is essential to have a product free from cracks, to prevent liquid leakage. This result can be obtained by the FRF technique (Sound Test): analysis of the acoustic signature that characterizes every object and identification of the parts showing deviations due to defects. However, both the intrinsic properties of the glass material, and the characteristics of the production process involve some statistical variability in the production results, in the sense that it is impossible to get a unique piece of “good” sample, to be used as reference. It is however necessary, for obvious logical containment costs, to avoid excessive production waste.

 The solution

In order to ensure the reliability of the control process, a system of statistical analysis has been developed: based on the identification of specific frequencies and their characteristics, it allows to define a guaranteed margin of reliability on the piece integrity assessment. At the end of this analysis, the most effective “rules” of test are therefore defined: this will avoid the possible presence of “false rejects” and confirm the absence of “false positives”.

Project Details

TECHNIQUESound Test
DATE2015
TAGSSound Test