Segmented Wheel Printing Device with Throw-On Plate Cylinders
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for printing on hollow bodies, such as cans and containers, face challenges in efficiently switching between different printing processes without interrupting production, particularly in high-speed manufacturing environments where rapid changes in print motifs or inks are required.
Innovation Solution
A method involving a segmented wheel with rotating printing blankets and plate cylinders, where a subset of plate cylinders can be changed and inked during ongoing production, allowing for seamless transition between printing processes without stopping the rotation of the segmented wheel, enabling continuous production and rapid changes in print patterns or inks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If plate cylinders are changed during ongoing production to switch between printing processes, then adaptability and productivity are improved, but the complexity of device operation and control increases
Solution Approach 1:
The plate cylinders are designed to be dynamically throwable onto or off of the segmented wheel during operation. This dynamic reconfiguration capability allows the system to adapt between different printing processes (single-color, multi-color, variable data) without requiring complete system shutdown or complex manual reassembly, thereby improving adaptability while keeping operation relatively simple through automated control
Solution Approach 2:
The printing system is segmented into modular plate cylinders that can be independently controlled and selectively engaged with the segmented wheel. Each plate cylinder can be independently thrown onto or off of the wheel based on the required printing process, enabling flexible adaptation while simplifying operation through modular, standardized interfaces
2Productivity
If the segmented wheel continues rotating without interruption during production changes, then productivity is improved, but the precision of plate cylinder positioning and ink transfer may be affected
Solution Approach 1:
The required plate cylinders are pre-positioned and pre-inked on the segmented wheel before they are needed for the printing process. This preliminary preparation ensures that when production changes occur, the correct plate cylinders are already in place and ready to transfer ink immediately, maintaining both continuous production and print quality without interruption or positioning errors
Solution Approach 2:
The segmented wheel maintains continuous rotation throughout production changes, ensuring uninterrupted productivity. The system achieves this by having plate cylinders already positioned and inked on the wheel before they are needed, allowing seamless transition between different printing processes without stopping the wheel, thus maintaining both productivity and precision
Data Source
AI summary
A method for operating a device for printing hollow cylinder is provided. The device comprises a rotating segmented wheel with a plurality of printing cylinders arranged successively along the periphery of the device. A plurality of plate cylinders are provided in association with the segmented wheel. According to a printing process to be performed, a selected quantity of plate cylinders is thrown onto the segment wheel or is thrown off the segment wheel. In a first printing process, a first partial quantity of thrown-on plate cylinders transfers printing ink to a plurality of the printing blankets arranged on the segment wheel. At the end of the printing process, at least some of the plate cylinders, that were thrown on the segment wheel in the first printing process, are thrown off the rotating segment wheel. During constant uninterrupted rotation of the segment wheel, for the implementation of a second printing process, a second partial quantity of plate cylinders is thrown onto the segment wheel and respectively transfer printing ink to a plurality of the printing blankets arranged on the segment wheel. The respective printing forme of at least one plate cylinder involved in the first printing process, and uninvolved in the ongoing second printing process, is changed during the ongoing printing process.