Folding Roller Gap Correction via Temperature Compensation
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Solution Overview
Problem
Existing folding machine technologies fail to maintain optimal gap width between folding rollers due to temperature fluctuations, leading to incorrect folds and changes in transport properties, as thermal expansion affects machine elements and electronic components differently across the machine.
Innovation Solution
A method that stores temperature-gap correction value characteristics in a process computer to automatically adjust the gap width between folding rollers based on measured temperatures, ensuring optimal folding performance by interpolating necessary corrections from empirical data and using positioning drives to maintain precise settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the gap width between folding rollers is preset at a reference temperature, then the folding operation is optimal at that temperature, but the gap width becomes incorrect when temperature changes occur
Solution Approach 1:
The patent applies parameter changes by storing multiple gap width correction values in a memory unit, each corresponding to different temperature ranges. The system dynamically selects and applies the appropriate correction value based on the measured temperature, thereby adjusting the gap width parameter to compensate for thermal expansion effects and maintain folding precision across varying temperatures.
Solution Approach 2:
The patent implements feedback through a temperature sensor that continuously monitors the actual temperature of the folding machine. This temperature information is fed back to the control unit, which then retrieves the appropriate correction value from memory and applies it to adjust the gap width, creating a closed-loop control system that maintains optimal folding conditions despite temperature fluctuations.
2Manufacturing precision
If temperature compensation is implemented using stored correction values, then folding accuracy is maintained across temperature ranges, but device complexity increases due to additional memory and control requirements
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing gap width correction values for various temperature ranges in the memory unit before operation. This allows the control system to simply retrieve and apply the appropriate correction value during operation, rather than performing complex real-time calculations, thereby maintaining high folding accuracy while minimizing the computational complexity of the control system.
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
This method ensures the gap width between folding rollers remains optimally set across varying temperatures, preventing geometric misalignment and signal level changes, thereby maintaining consistent folding quality and accuracy.
Implementation Method 1
it is known that folding roller gaps change in size by an average of around 1 μm per Kelvin due to thermal expansion of all elements involved in gap formation
Data Source
Figure 1~2
AI summary
The method involves measuring the temperature in a surrounding of a folding roller pair that is provided in a folding machine (10). Temperature gap correction value characteristics are empirically determined and stored in a memory of a storage computer (26). A gap correction value is read from the determined and stored temperature gap correction value characteristics, where the gap correction value depends on the measured temperature. Gap width is corrected corresponding to the gap correction value.