Extrusion Film Web Quality Control Using Process Fingerprints
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Solution Overview
Problem
Existing methods for monitoring and adjusting the production process of extruded products rely heavily on operator experience, which is diverse and not systematically consolidated, leading to inconsistent quality and potential deviations from desired product properties.
Innovation Solution
Implementing a method that uses sensors to continuously monitor process variables, compare them to setpoints, and automatically detect deviations, allowing for proactive adjustments and the creation of a 'fingerprint' of the production process to standardize and share operational knowledge across operators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If operator experience is used to adjust production parameters, then flexibility in handling diverse products is improved, but manufacturing precision and quality consistency deteriorate
Solution Approach 1:
The system continuously monitors process parameters and product properties, comparing actual values against target values. When deviations are detected, the system automatically adjusts production parameters to maintain quality consistency, eliminating the variability introduced by different operator experiences while preserving the ability to handle diverse products through programmed recipes
Solution Approach 2:
The system systematically analyzes relationships between process parameters and product properties, identifying optimal parameter combinations for different product types. By changing parameters based on systematic analysis rather than individual operator judgment, the system achieves both adaptability to diverse products and consistency in manufacturing precision
2Adaptability or versatility
If multiple operators with diverse experience work the extrusion line, then adaptability to different products is improved, but manufacturing precision deteriorates due to inconsistent approaches
Solution Approach 1:
The control system serves multiple functions: it stores individual operator experiences as structured recipes, automatically selects appropriate recipes based on product type, and executes them with precise parameter control. This universal system handles diverse products while ensuring consistent quality through standardized processes, making the system adaptable without sacrificing precision
3Device complexity
If manual monitoring and adjustment of production parameters is used, then device complexity is reduced, but productivity deteriorates due to delayed detection of property changes
Solution Approach 1:
The system automatically monitors process parameters, detects deviations from target values, and adjusts production parameters without operator intervention. This self-service capability enables early detection of property changes and immediate correction, significantly improving productivity while the standardized automated processes actually reduce overall system complexity
4Ease of operation
If production parameters are adjusted based on operator experience, then ease of operation is improved, but manufacturing precision deteriorates due to lack of systematic approach
Solution Approach 1:
The system pre-configures optimal production parameters and recipes based on systematic analysis of process-parameter relationships. When a product is to be produced, the appropriate pre-configured recipe is automatically selected and applied, making operation simple while ensuring manufacturing precision through systematically determined parameters rather than ad-hoc adjustments
Data Source
Figure 1
AI summary
The invention relates to various aspects in the production of extrusion products. The properties of extruded articles vary not only in their formulation, but also on the adjusting variables and in particular with thus resulting process data. The adjustment variables and in particular the process variables thus represent a state of the extrusion process characterised as "fingerprint". The thus claimed invention takes into account these facts and supports the operator of a production plant to detect earlier changes in quality and to systematically counteract a deterioration in the quality.