PET Bottle Label Stability via Dual Inspection Segmentation
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Solution Overview
Problem
Existing container handling systems fail to reliably prevent late detachment of labels from PET bottles, despite initial inspections, leading to customer complaints.
Innovation Solution
A method and system for treating PET bottles that involves applying a label, conducting a first inspection before filling, filling the containers, conducting a second inspection after filling, comparing the inspection results to determine label stability, and sorting out containers at risk of label detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single inspection is performed before labeling, then the inspection process is simple and fast, but label detachment cannot be detected after filling
Solution Approach 1:
The inspection process is segmented into two distinct inspection devices: a first inspection device that examines containers before labeling, and a second inspection device that examines labeled containers after filling. This segmentation allows each inspection to focus on specific aspects of label stability, with the second inspection specifically detecting label detachment that occurs during the filling process, thereby resolving the contradiction between inspection thoroughness and process simplicity
Solution Approach 2:
The first inspection device performs preliminary inspection of containers before labeling to identify containers with characteristics that may lead to label detachment. This preliminary action allows the system to prepare for potential issues by flagging problematic containers before the label is applied, enabling more targeted monitoring in the second inspection stage
2Reliability
If inspection equipment is added to detect label position changes, then label detachment can be detected, but the system complexity increases
Solution Approach 1:
The second inspection device is designed with multi-functionality, serving both to verify label position accuracy and to detect label detachment that occurs during filling. By combining these functions into a single device, the system avoids adding separate specialized equipment for each function, thereby reducing overall system complexity while maintaining comprehensive detection capability
Solution Approach 2:
The second inspection device provides feedback on label position and detachment status after filling, which is fed back to the control system. This feedback mechanism enables real-time detection of label detachment issues without requiring continuous manual inspection, automating the detection process and reducing the need for additional complex monitoring equipment
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a method for treating containers, in particular PET bottles, wherein the method comprises the following steps: applying (110) a label, in particular a wrap-around label, to containers in a labeling machine; first inspection (120) of the applied label, in particular a wrap-around label, by means of a first inspection device, wherein during the first inspection (120) of the label, in particular a wrap-around label, a first measured value relating to the label position is recorded; filling (130) the containers in a filling machine, wherein the method comprises the following step: second inspection (140) of the label, in particular a wrap-around label, after filling the containers in the filling machine by means of a second inspection device, wherein during the second inspection (140) a second measured value relating to the label position of the label is recorded.Furthermore, the invention relates to a corresponding system (200) for treating containers (10).