Processing Machine Cylinder Speed Ratio Adjustment
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Solution Overview
Problem
Machining machines face challenges in compensating for changes in processing lengths due to temperature variations and mechanical loads, leading to inefficiencies in printing results, particularly in flexo printing processes where shape cylinders need to be frequently adjusted to maintain precision.
Innovation Solution
The solution involves adjusting the processing length of shape units by controlling the speed of shape cylinders and counter cylinders, allowing for section-based corrections and adaptations in speed ratios, which can be automated using inspection devices to maintain register accuracy and flexibility in processing various materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the forme cylinder speed is adjusted to compensate for print length changes, then the print length accuracy is improved, but the adjustment effort and operational complexity increase due to repeated resets
Solution Approach 1:
The patent replaces manual mechanical adjustment of the forme cylinder with an automated control system that uses inspection device data to automatically regulate cylinder speed and position, eliminating the need for repeated manual resets while maintaining print length accuracy
Solution Approach 2:
The patent implements a feedback loop where inspection devices measure actual print lengths and sheet positions, and this information is fed back to the control system which automatically adjusts the forme cylinder speed and position to compensate for deviations, resolving the contradiction between precision and operational effort
2Manufacturing precision
If the forme cylinder is repeatedly reset to its original position for print length correction, then the print length accuracy is maintained, but the productivity decreases due to increased adjustment time
Solution Approach 1:
The patent performs preliminary measurement of sheet arrival times and print lengths using inspection devices before processing begins, allowing the control system to pre-calculate and pre-position the forme cylinder at the correct speed and position, eliminating the need for repeated resets during operation and maintaining high productivity
Solution Approach 2:
The patent replaces the manual reset mechanism with an automated control system that continuously regulates the forme cylinder based on real-time data from inspection devices, maintaining print length accuracy without interrupting the processing flow and thus preserving productivity
3Manufacturing precision
If the processing machine uses individual drives for each application unit with sheet sensors for regulation, then the print length correction precision is improved, but the device complexity increases
Solution Approach 1:
The patent implements a universal control architecture where a centralized control system manages multiple application units and forme cylinders, using common inspection devices and standardized communication protocols to regulate all units, thereby reducing overall system complexity while maintaining individual unit precision through coordinated control
Data Source
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AI summary
The invention relates to a processing machine (01) for processing a substrate (02), comprising at least one shaping unit (900), said at least one shaping unit (900) being equipped with at least one plate cylinder (901) and at least one counter-cylinder (902), a processing point (910) for processing a substrate (02) being located between the at least one plate cylinder (901) and the at least one counter-cylinder (902), wherein a speed (v1; ω1) of the at least one plate cylinder (901) and a speed (v2; ω2) of the at least one counter-cylinder (902) are at a speed ratio (v1/v2; ω1/ω2), and the speed ratio (v1/v2; ω1/ω2) at the processing point (910) can be and/or is modified according to a processing length (BL) of a substrate (02), the speed ratio (v1/v2; ω1/ω2) differing at least once within a full cylinder rotation. The invention also relates to an associated method.