Spreading Element Ring with Axial Offset to Prevent Web Edge Immersion
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Solution Overview
Problem
Existing spreading rollers often result in material web edge immersion into peripheral surface gaps, leading to visual quality losses and folds, especially with thin webs, due to the lack of supporting function and axial mobility restrictions.
Innovation Solution
A spreading element ring made of elastically deformable material with axially offset spreading elements and a variable circumferential surface gap design, preventing material web edge immersion by ensuring axial freedom and precise gap formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If spreading elements are arranged in a conventional configuration with uniform gaps, then the structure is simple, but material web edges immerse into peripheral surface gaps causing quality losses
Solution Approach 1:
The patent applies asymmetry by varying the axial positions of spreading elements around the circumference. Specifically, spreading elements are arranged at different axial heights in different circumferential zones, creating an asymmetric pattern that prevents web edges from uniformly immersing into gaps. This asymmetric arrangement disrupts the harmful immersion effect while maintaining structural feasibility.
Solution Approach 2:
The patent transitions from a two-dimensional arrangement (elements in a single axial plane) to a three-dimensional arrangement by offsetting spreading elements axially in different circumferential positions. This dimensional change creates variable gap heights around the circumference, preventing web edge immersion while adding controlled complexity to the arrangement.
2Productivity
If spreading elements are made axially mobile to improve spreading effect, then spreading performance increases, but web edges may buckle or fold due to lack of support
Solution Approach 1:
The patent implements dynamics by making spreading elements axially mobile within defined limits. The elements can move axially to adapt to varying web thicknesses and spreading requirements, enhancing spreading effectiveness. However, this mobility is controlled and bounded to prevent excessive movement that would cause web buckling or folding.
Solution Approach 2:
The patent applies local quality by providing different axial positions for spreading elements in different circumferential zones. Elements in certain zones are positioned to provide support function, while elements in other zones are positioned to maximize spreading effect. This localized differentiation allows the system to simultaneously maintain web integrity and achieve effective spreading.
3Ease of operation
If peripheral surface gaps are made larger to allow element mobility, then axial freedom increases, but web edges immerse more deeply into gaps
Solution Approach 1:
The patent applies local quality by creating different gap characteristics in different circumferential zones. In zones where web support is critical, smaller gaps or differently positioned elements are used to prevent immersion. In zones where spreading mobility is prioritized, larger gaps are permitted. This localized differentiation resolves the contradiction between mobility freedom and immersion prevention.
Solution Approach 2:
The patent resolves the gap size contradiction by transitioning to three-dimensional gap configuration. Instead of uniform gap sizes in a single plane, elements are positioned at different axial heights, creating variable gap heights around the circumference. This allows larger effective gaps for mobility in certain zones while maintaining smaller effective gaps for support in other zones.
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
The solution effectively prevents material web edge immersion, maintains axial mobility, and enhances the spreading effect, reducing quality losses and web buckling across various web thicknesses.
Implementation Method 1
a spreading element ring made of elastically deformable material for a spreading roller for laterally spreading a flat material web
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to a spreading roller (1) for the lateral spreading of a flat material web (2) in axial spreading directions (3, 4), comprising a circumferential surface (21, 100), by which the spreading roller is brought in effective contact with the flat material web, an axis of rotation (6), about which the spreading roller rotates, and a plurality of spreading element rings (15, 42, 50, 55, 65, 66, 81, 82, 95, 110, 130) having individual spreading elements (20, 68, 70, 103, 113, 133), said spreading element rings forming the circumferential surface, wherein a circumferential surface gap (27, 71, 96, 117, 140) is arranged between individual spreading element rings on the circumferential surface, which extends in each case between two immediately adjacent spreading element rings in the peripheral direction about the spreading roller, wherein means (40, 45, 97, 122, 145) are provided for preventing a critical radial immersing of a material web edge into the circumferential surface gap.