Packaging Web Positioning via Linear and Pivoting Adjustment
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Solution Overview
Problem
Existing devices for adjusting the position of packaging material webs in packaging machines apply excessive mechanical stress, particularly on thin materials, due to reliance on a single device for center alignment, which can lead to web tearing and require precise alignment of other machine components.
Innovation Solution
A dual-device system is implemented, comprising a linear displacement device and a pivoting device, each with multiple positions, allowing for controlled adjustments with reduced mechanical stress and self-alignment capabilities, aided by sensors and tension measurement for uniform web tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single device is used to adjust the position of the packaging material web, then the structure is simple, but the mechanical stress on the web is high which can cause tearing
Solution Approach 1:
The adjustment function is divided into two separate devices: a linear displacement device for lateral movement and a pivoting device for angular adjustment. This segmentation distributes the mechanical stress across multiple components rather than concentrating it in a single device, thereby preventing web tearing while maintaining structural manageability.
2Device complexity
If a single device is used to adjust the web position, then the device count is low, but the alignment precision of other machine components becomes critical
Solution Approach 1:
The system changes the adjustment parameters by providing two independent adjustment mechanisms (linear displacement and pivoting) instead of relying on a single device. This allows for more flexible and precise positioning of the web center relative to the reference point, reducing the sensitivity to alignment precision requirements of other machine components.
3Manufacturing precision
If large changes in conveying direction are applied to align the web center, then the alignment is achieved, but the mechanical load on the web material increases significantly
Solution Approach 1:
The alignment process is divided into two separate adjustment stages: lateral displacement and angular pivoting. Each stage contributes partially to the final alignment, allowing for smaller incremental changes in conveying direction at each stage rather than requiring a single large adjustment, thereby reducing mechanical load on the web.
Solution Approach 2:
The system uses two independently controllable devices that can be adjusted dynamically to achieve the desired web center alignment. This dynamic adjustment capability allows for optimized force distribution during the alignment process, minimizing peak mechanical loads on the packaging material.
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
The invention relates to a device (10) for adjusting the position of a packaging material path (1, 1'), in particular the path center (2, 2') of the packaging material path (1, 1'), relative to a reference (103) in a packaging machine. According to the invention, two devices (21, 26) are provided for adjusting the position of the packaging material path (1, 1'), the first device (21) being designed to linearly move the packaging material path (1, 1') in a direction running perpendicularly to the transport direction (23) of the packaging material path (1, 1') and the second device (26) being designed to pivot the packaging material path (1, 1') about an axis (28) arranged perpendicularly to the transport direction (23) of the packaging material path (1, 1').