Printing Template Inspection Control for Misprint Prevention
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Solution Overview
Problem
Existing printing systems fail to effectively monitor and manage the condition of printing templates, leading to potential misprints due to contamination or damage, necessitating frequent cleaning and replacement.
Innovation Solution
A control system that utilizes a camera and AI-supported image analysis to classify printing templates as reusable or non-reusable based on soiling and damage, integrating a feed and discharge mechanism to automate template handling and a user interface for training and manual override.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If printing templates are used continuously without monitoring, then productivity is maintained, but reliability deteriorates due to contamination and damage leading to misprints
Solution Approach 1:
The system performs preliminary inspection of printing templates before they are used for printing. The camera device captures images of the template, and the evaluation unit assesses whether the template is suitable for use, preventing contamination and damage from affecting print quality
Solution Approach 2:
The system establishes a feedback loop where the evaluation unit continuously monitors template condition and provides information back to the control unit. Based on this feedback, the system can automatically replace templates or adjust printing parameters to maintain reliability
2Reliability
If printing templates are frequently inspected and replaced, then reliability is improved, but productivity deteriorates due to downtime for template changes
Solution Approach 1:
The system enables self-service operation by automatically inspecting and evaluating printing templates without requiring manual intervention. The control unit automatically decides whether to replace the template based on evaluation results, eliminating the need for operators to constantly monitor and replace templates
Solution Approach 2:
The patent replaces manual inspection and decision-making with an automated optical inspection system using cameras and image evaluation algorithms. This substitution of mechanical/manual processes with automated systems reduces time loss while maintaining or improving reliability
3Measurement precision
If manual inspection of printing templates is performed, then measurement precision can be achieved, but device complexity increases due to additional monitoring equipment
Solution Approach 1:
The camera device and evaluation unit are integrated into the existing printing press structure, allowing the same system to serve multiple functions: quality inspection, template condition monitoring, and automated decision-making. This multi-functionality reduces the need for separate dedicated inspection equipment
Solution Approach 2:
The system creates optical copies (images) of the printing template using a camera device, allowing non-contact inspection and evaluation. This copying approach enables precise measurement of template condition without physically touching or disturbing the template
4Productivity
If printing templates are not cleaned regularly, then productivity is maintained, but object-affected harmful factors increase leading to contamination and misprints
Solution Approach 1:
The system performs preliminary detection of contamination on printing templates before it affects print quality. By identifying contaminated templates in advance, the system can prevent harmful factors from transferring to the printed material
Solution Approach 2:
The evaluation unit provides continuous feedback on template contamination levels, enabling the control unit to make informed decisions about template replacement or cleaning, thus preventing contamination from affecting printing quality
Data Source
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AI summary
Control system (1) for a printing device (17) for printing, in particular on planar substrates, comprising a frame (2) on which a receptacle (3) for a printing template (4), in particular a printing screen or printing stencil, is arranged, a camera device (6) associated with the receptacle (3), and a user interface (10) for inputting and/or receiving information. An evaluation device (11) is provided, which is connected to the camera device (6) to receive at least one image of the printing template (4) captured by the camera device (6), wherein the evaluation device (11) is configured to classify the printing template (4) as reusable or non-reusable depending on the received image.