Reversing Roller Tension Control for Wrinkle-Free Winding
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Solution Overview
Problem
In printing machines, excessive tension can cause wrinkles in the medium during winding, while insufficient tension leads to fluctuations in the winding position, resulting in poor-quality printed materials.
Innovation Solution
A medium wind-up device comprising a tension roller, a reversing roller that follows the medium's movement, and a loading mechanism to apply a load against the reversing roller's rotation, which shortens the transfer path and provides consistent tension to prevent wrinkles and position fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If excessive tension is provided to the medium, then the medium contracts in width-wise direction, but a wrinkle is caused at wind-up portion
Solution Approach 1:
The transfer path is segmented into multiple sections by introducing a reversing roller, allowing tension to be distributed across different segments. This prevents excessive tension concentration that causes wrinkles while maintaining sufficient tension for stable winding.
Solution Approach 2:
A reversing roller is introduced as an intermediary element between the tension source and wind-up portion. This mediator redistributes the tension force through its rotation, preventing direct transmission of excessive tension that would cause wrinkles while maintaining controlled tension for stable winding.
2Force
If insufficient tension is provided to the medium, then winding position fluctuates in width-wise direction, but a part of end face protrudes
Solution Approach 1:
The transfer path is divided into multiple controlled segments by the reversing roller, allowing independent tension management in each segment. This segmentation enables maintaining consistent tension throughout the path, preventing winding position fluctuations and end face protrusion.
Solution Approach 2:
The reversing roller acts as an intermediary that stabilizes tension transmission. Its rotation follows the medium's movement, providing continuous tension adjustment that prevents winding position fluctuations and ensures precise winding without end face protrusion.
3Device complexity
If the transfer path from tension roller to wind-up portion becomes long, then more components are needed, but a wrinkle is likely to be caused at middle part of medium
Solution Approach 1:
The transfer path is segmented by introducing a reversing roller, creating multiple shorter sections instead of one long continuous path. This segmentation reduces the effective length of each tension-transmitting segment, preventing wrinkle formation while maintaining a relatively simple overall device structure.
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
The solution effectively suppresses wrinkles and position fluctuations, ensuring high-quality winding and printed materials by maintaining consistent tension and smooth transfer of the medium.
Implementation Method 1
a loading mechanism, configured to be capable of placing a load against a rotation of the reversing roller
Implementation Method 2
a tension roller, configured to press a medium, which is belt-shaped and transferred in a transfer direction that is predetermined, in order to provide the medium with a tension
Data Source
AI summary
A medium wind-up device is provided to suppress causing a wrinkle at a time of winding a medium, and also suppress a fluctuation of a winding position. The medium wind-up device includes: a tension roller that presses a medium, which is belt-shaped and transferred in a transfer direction that is predetermined, in order to provide the medium with a tension; a reversing roller that reverses the medium pressed by the tension roller, and the reversing roller being rotatable so as to follow a move of the medium; a loading mechanism that is capable of placing a load against a rotation of the reversing roller; and a wind-up portion that winds up the medium reversed by the reversing roller.