Crimping Roller Interruption Bands for Stronger Aerosol Plugs
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Solution Overview
Problem
Existing crimped sheet materials in aerosol-generating articles suffer from low tensile strength, release of loose particles, and unpredictable resistance-to-draw values due to continuous crimping, which complicates transportation and assembly.
Innovation Solution
A method involving crimping rollers with alternating corrugated and interruption bands, where corrugations in the corrugated regions have a higher amplitude and interruption bands have a lower amplitude, forming a crimped sheet with inclined bands to enhance tensile strength and prevent particle release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If continuous crimping is applied to the sheet, then the sheet structure is formed, but the tensile strength decreases and loose particles are released
Solution Approach 1:
The crimping roller is divided into alternating corrugated regions and interruption bands, creating segmented crimping zones. This segmentation allows the sheet to be crimped in specific regions while maintaining strength in interruption bands, resolving the contradiction between forming the crimped structure and preserving tensile strength.
Solution Approach 2:
Different regions of the crimping roller provide different local qualities: corrugated regions create crimped structures with high amplitude for shape formation, while interruption bands provide low amplitude regions that maintain tensile strength. This local differentiation resolves the contradiction by applying crimping only where needed while preserving strength where required.
2Shape
If continuous crimping is applied to the sheet, then the sheet structure is formed, but loose particles are released
Solution Approach 1:
The crimping roller is divided into alternating corrugated regions and interruption bands, creating segmented crimping zones. This segmentation allows the sheet to be crimped in specific regions while maintaining strength in interruption bands, resolving the contradiction between forming the crimped structure and preserving tensile strength.
Solution Approach 2:
Different regions of the crimping roller provide different local qualities: corrugated regions create crimped structures with high amplitude for shape formation, while interruption bands provide low amplitude regions that maintain tensile strength. This local differentiation resolves the contradiction by applying crimping only where needed while preserving strength where required.
3Strength
If interruption bands are added to the crimping roller, then tensile strength is improved, but the device complexity increases
Solution Approach 1:
The interruption bands are integrated directly into the crimping roller surface as alternating regions with the corrugated patterns, merging the crimping function and the strength-enhancing interruption function into a single unified component. This eliminates the need for separate interruption mechanisms, resolving the contradiction between improving tensile strength and maintaining device simplicity.
4Object-generated harmful factors
If the distance between interruption bands is reduced, then particle release is prevented, but manufacturing precision requirements increase
Solution Approach 1:
The invention specifies that the distance between adjacent interruption bands should be smaller than half the length of the plug in the longitudinal direction. This parameter change optimizes the balance between preventing particle release (by reducing spacing) and maintaining manufacturing feasibility (by setting a practical upper limit rather than requiring extremely tight tolerances).
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 method improves tensile strength, prevents loose particle release, and ensures even channel alignment, resulting in better resistance-to-draw values and smoother plug formation.
Implementation Method 1
The sheet is fed along a longitudinal direction of the sheet to a set of crimping rollers. The sheet is crimped to form a crimped sheet.
Implementation Method 2
In the corrugated regions, the crimped sheet comprises a plurality of corrugations extending in the longitudinal direction. In the interruption bands, the crimped sheet is free of corrugations or comprises corrugations having a smaller corrugation amplitude.
Data Source
AI summary
A method for producing a plug for forming part of an aerosol-generating article is provided, the method including: feeding a sheet along a longitudinal direction to a set of crimping rollers; forming a crimped sheet including corrugated regions and interruption bands, the sheet including corrugations extending in a longitudinal direction, in the interruption bands, the sheet having no corrugations or corrugations with smaller corrugation amplitude, the bands and the regions being alternatingly arranged, each band including leading and trailing portions arranged on opposite sides of the sheet, a width of the sheet being an extension of the sheet orthogonal to the longitudinal direction, and the leading portion being arranged at a different location than the trailing portion; gathering the sheet; and forming a plug from the gathered sheet.