Method for measuring the wall thickness of a hollow glass article

A method for checking a circumferential distribution of a wall thickness of a hollow glass article in a hollow glass production system with a hot end and a cold end, the hollow glass production system comprising at least one glass forming machine with an exit being at the hot end of the hollow glass production system and a thermal treatment device for thermally treating a plurality of hollow glass articles, the thermal treatment device comprising an entrance and an exit arranged downstream of the glass forming machine in a passage direction of the hollow glass article, the exit of the thermal treatment device defining a start of the cold end of the hollow glass production system, the hollow glass production system further comprising transport devices for transporting the hollow glass article from the exit of the at least one glass forming machine to the entrance of the thermal treatment device and leading away from the exit of the thermal treatment device, at least one IR camera being arranged at the hot end for recording areas of a distribution of an overall radiation emitted by the plurality of hollow glass articles, the method comprising the following:

• measuring a circumferential rotational angle-dependent distribution of the wall thickness of a hollow glass article of a plurality of hollow glass articles at the cold end of the hollow glass production system to determine a wall thickness distribution at the cold end;
• measuring a circumferential distribution of the overall radiation of the hollow glass article at the hot end of the hollow glass production system with the at least one IR camera to determine the overall radiation at the hot end;
• associating the circumferential distribution of the overall radiation at the hot end with the circumferential rotational angle-dependent distribution of the wall thickness at the cold end to establish a functional dependence between measured values obtained by the measurements of the circumferential distribution of the overall radiation and the circumferential rotational angle-dependent distribution of the wall thickness to identify a wall thickness progression based on the overall radiation at the hot end;
• and
• based on the wall thickness progression, at least one of:
• setting machine parameters of the hollow glass production system;
• or
• ejecting a particular hollow glass article.