Undulating Band Guide Tracks for Gap-Free Joining
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Solution Overview
Problem
Existing devices for guiding bands to be joined along their longitudinal edges often require a wedge-shaped joining angle, which can lead to plastic deformation when joining thick or high-strength bands, and struggle to maintain parallelism and gap-free contact.
Innovation Solution
The device employs undulating tracks with adjustable guide elements, allowing for transverse displacement and rotation of bands to create a wedge-shaped joining angle without plastic deformation, using plain bearings, rollers, or rotatably mounted balls, with adjustable inclination and height settings to accommodate varying band thickness, width, and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a wedge-shaped joining angle is used to guide bands to be joined, then the bands can be joined along their longitudinal edges, but plastic deformation occurs when joining thick or high-strength bands
Solution Approach 1:
The patent replaces the conventional wedge-shaped joining angle with an undulating (sinusoidal) track configuration. The bands are guided through curved, wave-like paths that gradually bring them together without creating concentrated stress points. This curvature distribution eliminates the sharp angular contact that causes plastic deformation in thick or high-strength bands, while still achieving precise edge alignment for joining.
Solution Approach 2:
The patent changes the geometric parameters of the guiding track from a linear wedge shape to an undulating shape with specific wavelength and amplitude characteristics. By controlling the undulation parameters (wavelength between 0.25m and 2m, amplitude between 0.05m and 0.5m), the system achieves gradual band convergence that prevents excessive localized stress, thereby avoiding plastic deformation while maintaining joining precision.
2Manufacturing precision
If guide elements are used to maintain parallelism of longitudinal edges, then gap-free contact is achieved, but the device complexity increases
Solution Approach 1:
The undulating track structure serves multiple functions simultaneously: it guides the bands along the joining path, maintains the required wedge angle for joining, ensures edge parallelism through its geometric configuration, and provides gap-free contact at the joining point. This multi-functionality eliminates the need for separate guide elements that would otherwise be required to achieve each of these objectives individually, thereby reducing overall device complexity.
Solution Approach 2:
The undulating track is divided into multiple segments or sections, each with specific geometric characteristics that address different aspects of band guidance. The track can be constructed from modular components that can be adjusted independently, allowing optimization of each section's function while maintaining overall system simplicity. This segmentation enables precise control of band positioning without requiring a complex array of independent guide elements.
Data Source
AI summary
The invention relates to a method and a device for guiding bands to be joined to one another along their longitudinal edges, comprising guide elements which form tracks for guiding the bands that are configured such that the bands approach one another in the transport direction and the longitudinal edges thereof rest on one another at a non-overlapping contact point. At least one of the tracks may be configured to undulate with a wavelength of ¼≦λ≦2, such that transverse displacement of the band guided thereon occurs. The axes of rotation and/or longitudinal central axes of the guide elements may also be inclined towards one another at different angles of inclination in relation to a horizontal plane of reference, such that the band guided on said track is rotated about its longitudinal axis in the transport direction.