Rotary Printing Press Calibration Tool for Cylinder Positioning
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Solution Overview
Problem
The calibration process of rotary printing presses is inefficient, inaccurate, and lacks reproducibility due to reliance on human intervention and subjective judgments, leading to significant waste during the start-up phase of print jobs.
Innovation Solution
A calibration method involving a calibration tool with switches mounted on a mandrel, which automatically detects contact with other components and stores the measured position as a reference, reducing human intervention and enhancing precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual calibration with human intervention is used, then the calibration process can be performed, but the accuracy and reproducibility are insufficient
Solution Approach 1:
The patent replaces manual mechanical calibration operations with an automated measurement system. A measurement device (such as a laser measurer or coordinate measuring machine) automatically measures the position of the printing cylinder and anilox roller, eliminating human intervention in the measurement process and thereby improving both accuracy and reproducibility of the calibration.
Solution Approach 2:
The calibration system performs self-measurement and self-calibration without requiring skilled operators. The automated measurement device independently captures position data, and the control unit automatically processes this data to determine reference positions, allowing the system to calibrate itself rather than requiring human expertise.
2Productivity
If manual calibration methods are used, then the calibration process can be completed, but the time consumption is high and waste is significant
Solution Approach 1:
The patent performs calibration measurements and determines reference positions before the actual printing process begins. By pre-measuring the positions of the printing cylinder and anilox roller and storing these as reference data in the control unit, the system eliminates the need for time-consuming manual calibration during the start-up phase of printing, thereby reducing waste and improving productivity.
Solution Approach 2:
The automated measurement system rapidly captures position data without requiring manual intervention, significantly reducing the time needed for calibration compared to manual methods. This automated approach enables quick calibration before printing starts, minimizing the start-up time and associated waste.
3Reliability
If conventional calibration procedures are used, then the basic calibration can be performed, but the reproducibility is low due to subjectivity
Solution Approach 1:
The patent replaces subjective manual calibration operations with an automated measurement and control system. The measurement device objectively captures position data, and the control unit automatically processes this data to determine reference positions, eliminating human subjectivity and thereby significantly improving the reproducibility of the calibration process.
Solution Approach 2:
The system uses feedback from the automated measurement device to automatically adjust and verify the calibration. The control unit receives position data from the measurement device, processes this information, and stores the reference positions, creating a closed-loop feedback system that ensures consistent and reproducible calibration results without requiring manual verification.
Data Source
AI summary
A method for calibrating a rotary printing press, in which a bearing structure for a printing cylinder is adjusted relative to another component of the printing press, and positions of the bearing structure are measured, including the steps of mounting a calibration tool on a mandrel that is supported in the bearing structure, the calibration tool having at least one contact sensitive switch, moving the bearing structure until the at least one switch contacts the other component, and upon detection of a signal from the at least one switch, storing a measured position of the bearing structure as a reference position.