Helical Guide Folding Apparatus for Web Edge Alignment
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Solution Overview
Problem
In the production of absorbent hygiene articles like nappies or incontinence pants, existing folding apparatuses fail to precisely align the longitudinal edges of a composite web after folding, leading to inconsistent product quality.
Innovation Solution
A folding apparatus with a folding section and adjustable guides that use helical sliding surfaces and motor-driven belts to ensure precise alignment of the web's longitudinal edges, utilizing a contact unit and position sensors to adjust the guides' position relative to the web's axis of rotation for accurate edge alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional folding apparatuses are used to fold the composite web, then the folding operation can be performed, but the longitudinal edges of the web cannot be precisely aligned after folding
Solution Approach 1:
The patent employs position sensors to detect the actual position of the longitudinal edges of the web after folding, and feeds this information back to a control system. The control system then adjusts the guides' positions automatically to achieve precise alignment. This closed-loop feedback mechanism resolves the contradiction by enabling high precision alignment without requiring overly complex manual adjustment mechanisms.
Solution Approach 2:
The patent replaces manual mechanical adjustment mechanisms with an automated control system that uses position sensors and actuators to adjust the guides' positions. This substitution of mechanical systems with automated control resolves the contradiction by achieving precise alignment through electronic control rather than complex mechanical linkages.
2Manufacturing precision
If the guides are made adjustable to control edge alignment, then positioning precision can be improved, but the device complexity increases
Solution Approach 1:
Position sensors continuously monitor the alignment of the longitudinal edges and provide feedback to the control system. The control system automatically adjusts the guides' positions based on this feedback, eliminating the need for complex manual adjustment mechanisms while maintaining high positioning precision.
Solution Approach 2:
The adjustable guides are equipped with actuators that automatically adjust their positions based on feedback from position sensors. This self-service capability allows the system to maintain precise alignment without requiring complex external control mechanisms or manual intervention.
3Manufacturing precision
If position sensors and automated control systems are added to achieve precise edge alignment, then manufacturing precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent uses position sensors to detect edge positions and feeds this information back to a control system that automatically adjusts the guides. This feedback mechanism achieves high precision alignment with a relatively simple control architecture, resolving the contradiction by using intelligent control rather than complex mechanical systems.
Solution Approach 2:
The patent replaces complex mechanical adjustment mechanisms with a streamlined automated control system using position sensors and actuators. This substitution reduces overall device complexity by eliminating intricate mechanical linkages while maintaining high positioning precision through electronic control.
Data Source
AI summary
A folding apparatus for a continuous web for production of absorbent hygiene articles and intended to be folded into a “V” or “U” shape in first and second longitudinal portions along a folding line parallel to a feeding line. A folding section includes a contact unit extending along the feeding line and defining the folding line. First and second guides are positioned on opposite sides of the contact unit and respectively have first and second sliding surfaces. The first and second sliding surfaces extend in a helical fashion along the feeding line, each having a respective infeed section, where the web is not folded, and a respective outfeed section, positioned downstream of the respective infeed section according to a web feeding direction, where the web is folded in two and has the first portion and the second portion set at an angle to each other.