In-line Film Inspection Using Detectable Components
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current quality assurance methods for films, particularly packaging films, are time-consuming, laborious, and destructive, as they require offline analysis of small film samples to detect discontinuities, which are not representative of the entire film and can interrupt the production process.
Innovation Solution
A process that adds detectable components to film layers for automated inspection using machine vision systems to detect discontinuities over a substantial portion of the film, allowing for continuous, in-line quality checking without destroying the film, enabling detection of small discontinuities down to 2 mm or less.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If offline analysis of small film samples is used, then discontinuities can be detected, but the process is time-consuming, laborious, and destructive
Solution Approach 1:
The patent replaces manual mechanical inspection methods with an automated optical inspection system that uses a light source and sensor array to detect discontinuities in the film layer, eliminating the need for physical sample removal and manual analysis
Solution Approach 2:
The inspection system creates an optical copy or image of the film layer by passing light through it and detecting the transmitted light pattern, allowing non-destructive visualization of discontinuities without physically contacting or removing the film
2Measurement precision
If offline analysis of small film samples is used, then discontinuities can be detected, but only a small portion of the film is checked
Solution Approach 1:
The inspection system is designed to inspect the entire width and length of the continuous film web as it moves through the extrusion process, providing universal coverage of all film areas rather than limited sample inspection
Solution Approach 2:
The system provides continuous inspection of the moving film web throughout the production process, maintaining constant monitoring of the entire film surface area rather than intermittent sampling
3Reliability
If offline analysis is used, then quality checking can be performed, but the production process is interrupted
Solution Approach 1:
The inspection system performs quality checking in advance during the film extrusion process itself, before the film is completed and packaged, allowing immediate detection and correction of issues without stopping production
Solution Approach 2:
The inspection process operates continuously alongside the film production process, with the light source and sensor array moving in synchrony with the film web to maintain uninterrupted quality monitoring throughout manufacturing
4Reliability
If offline analysis is used, then quality checking can be performed, but film destruction occurs
Solution Approach 1:
The system replaces mechanical sampling and physical testing methods with non-contact optical inspection, using light transmission characteristics to detect discontinuities without physically touching or damaging the film
Solution Approach 2:
The inspection creates an optical representation of the film's light transmission properties, allowing quality assessment of the entire film without removing or destroying any material samples
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables quick and efficient detection of discontinuities across the entire film, ensuring the suitability of film layers for their intended functions without interrupting production, providing real-time feedback on film quality and reducing material waste.
Implementation Method 1
The detecting of the presence of the functional layer and a discontinuity in the functional layer is carried out by inspecting the web with a machine vision system capable of detecting the presence or absence of the detectable component in the functional layer
Data Source
AI summary
The continuity of a functional layer of a web (32, 60, 78) is assessed by forwarding the web, detecting (42, 63) the presence of the functional layer and a discontinuity and/or a thin region in the functional layer, and generating a signal in response to the discontinuity and/or thin region. The functional layer comprises a detectable component (360) in a thermoplastic composition. The detecting is carried out by a machine vision system capable of detecting the detectable component (360) in the functional layer. The detectable component (360) can be active or passive. Also included are systems for carrying out the process.