Paper Cushioning Machine Bracket Tension Control
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Solution Overview
Problem
Existing machines for producing paper cushions face challenges in maintaining constant tension and preventing tearing at high conveying speeds and during stoppages, especially with small supply roll diameters, which affects the production of paper cushions of different formats.
Innovation Solution
The machine incorporates a bracket to maintain paper web tension, an adjustable paper guide for regulating cushion width, deflection rollers with spring pre-tensioning to prevent tearing, and a funnel-shaped chute with adjustable outlet for varying paper pad sizes, ensuring smooth operation and reduced inclination of the paper web.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the machine operates at high conveying speeds, then productivity is improved, but the paper web may tear due to insufficient tension control
Solution Approach 1:
The bracket is positioned upstream in the paper web path to pre-tension the web before it enters the forming device. This preliminary tensioning action ensures the paper web is properly conditioned for high-speed operation, preventing tearing during conveying while maintaining productivity.
Solution Approach 2:
The bracket dynamically adjusts the tension parameter of the paper web through its positioning and pressing mechanism. By changing the tension parameter adaptively, the system maintains paper web integrity across varying conveying speeds, resolving the contradiction between high productivity and reliability.
2Device complexity
If the supply roll diameter is small, then the machine structure is simplified, but the paper web tension becomes unstable
Solution Approach 1:
The bracket acts as an intermediary element between the supply roll and the forming device. It mediates the paper web path, providing the necessary tensioning function that would otherwise require a larger supply roll diameter. This allows the machine to maintain simple structure while achieving stable paper web tension through the bracket's intervention.
3Ease of operation
If the machine is stopped during operation, then maintenance or roll change is enabled, but the paper web continues to run due to inertia causing potential tearing
Solution Approach 1:
The bracket maintains continuous paper web tensioning even during machine stoppages. This preliminary and sustained tensioning action prevents the paper web from becoming loose or tearing due to inertia-driven running, ensuring reliability during maintenance operations or roll changes.
4Productivity
If the paper web inclination angle is reduced, then drawing into the forming device is improved, but additional support structures are required
Solution Approach 1:
The bracket serves multiple functions: it tensions the paper web, supports the paper web at a reduced inclination angle, and guides the paper web into the forming device. By combining these functions in a single component, the system achieves improved drawing efficiency without proportionally increasing device complexity.
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
Enables trouble-free production of paper cushions at various speeds and with different paper types, including heavy supply rolls and papers with low tear strength, preventing web tearing and ensuring consistent tension during restarts.
Implementation Method 1
a spring is additionally provided, which pretensions the deflection roller in the elongated holes
Implementation Method 2
the paper web is to a certain extent erected by the weight of the bracket lying on it
Implementation Method 3
the shaft of which is movably mounted in oblong holes, in particular against the force of a spring
Data Source
Figure 1~3
Figure 2
AI summary
The present invention relates to a device for the production of paper cushioning from a paper web (8) rolled up into a supply roll (12), wherein the device has a machine comprising a support device for the pivoted support of the supply roll, a reshaping device (22, 22′, 22″) for reshaping the paper web, and a device for the production of the paper cushioning. A bracket (30) that can be pivoted between a contact position and a releasing position is provided in a region in front of the paper web infeed into the reshaping device, wherein the bracket rests on the paper web in the contact position.