Oscillating Coiling Device for Foil Edge Reinforcement
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Solution Overview
Problem
Existing methods for coiling plastic foils struggle with flexibility in cutting and coiling multiple partial foils inline, leading to thickened edges, increased outer dimensions, and difficulty in adjusting foil width and edge reinforcement, which affects packaging and mechanical stability.
Innovation Solution
A method and device that allow for flexible coiling of foil sections with arbitrary width by cutting and folding foils inline, using a knife and folding device that oscillate transversely to coiling devices, enabling synchronized movement and adjustable edge reinforcement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the lateral end regions of the foil are crimped over to reinforce edges, then mechanical stability of the foil is improved, but the foil thickness in lateral regions increases (thickening occurs)
Solution Approach 1:
The coiling device is given an oscillating transverse movement during the coiling process, making the system dynamic rather than static. This oscillation prevents the folded edges from accumulating in the same position, thereby reducing thickness buildup while maintaining edge reinforcement benefits
Solution Approach 2:
The coiling device performs periodic oscillating movements in the transverse direction during coiling. This periodic action distributes the folded edge regions alternately on different sides of the coil, preventing continuous thickening in one location and reducing overall coil diameter increase
2Volume of moving object
If the coiling device is given an oscillating transverse movement to prevent thickening, then foil thickness in lateral regions is reduced, but device complexity increases
Solution Approach 1:
The oscillating transverse movement function is integrated into the existing coiling device structure, merging the edge reinforcement function with the coiling operation. This combination eliminates the need for separate oscillation mechanisms, reducing overall device complexity while achieving thickness reduction
3Adaptability or versatility
If several lamellar partial foils are cut from a delivered foil for coiling, then flexibility in handling different foil sections is improved, but the process requires subsequent offline coiling operations
Solution Approach 1:
The invention enables continuous inline coiling of multiple partial foils directly from the extruder without interrupting the production process. The coiling device continuously receives and processes different foil sections as they are produced, maintaining uninterrupted production flow and eliminating offline coiling operations
4Adaptability or versatility
If the width of foil sections is changed to accommodate different uses, then adaptability to different applications is improved, but the ability to change width is limited in existing solutions
Solution Approach 1:
The coiling device incorporates adjustable parameters that allow dynamic modification of coiling characteristics during operation. This enables easy adjustment of foil section width and other parameters to accommodate different application requirements without complex reconfiguration
Data Source
AI summary
The coiled foil rolls are reinforced in their edge region by folding. The coiled foil rolls are made by supplying a foil to coiling devices; cutting the foil in a conveying direction with a knife so that at least two foil sections are created which extend in a conveying direction; folding the edge regions of the foil sections by a folding device and laying the folded sections and the remaining part of the foil section on each other; and coiling the foil sections with the coiling devices. The knife or the folding device are moved simultaneous oscillating back and forth in a direction transversal to the conveying direction during the coiling of the foil sections.