Embossing Roller with Radial Groove Variation for Tobacco Strip
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Solution Overview
Problem
Existing embossing rollers in the tobacco processing industry fail to achieve uniform embossing of wrapping material strips transversely to the longitudinal axis, leading to incomplete deformation and stretching back of the material at the edges due to insufficient holding by lateral flanks.
Innovation Solution
An embossing roller with a geometry that is more pronounced in the outer area than the inner area, featuring alternating grooves and elevations with a radial increase in size towards the edges, preventing the material from being drawn into the embossing geometry and ensuring uniform clamping and deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the embossing geometry has uniform grooves and elevations across the entire surface, then the manufacturing is simple, but the embossing uniformity across the width of the strip deteriorates
Solution Approach 1:
The embossing roller is designed with varying groove depths across its width: grooves at the outer edges have a first depth while grooves in the inner area have a second, greater depth. This local variation in geometry ensures that the lateral flanks provide sufficient holding force at the edges to prevent material draw-in, while maintaining adequate embossing pressure across the entire strip width.
2Device complexity
If the lateral flanks of the embossing geometry are not sufficiently pronounced at the edges, then the device complexity is reduced, but the material holding capability at edges deteriorates
Solution Approach 1:
The lateral flanks of the embossing roller are designed with local variation in prominence: the flanks at the outer edges are more pronounced (greater radial distance from the axis) than the flanks in the inner area. This ensures that the edges of the wrapping material strip are adequately held in place during embossing, preventing the material from being drawn into the embossing geometry at the edges.
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
This design ensures a well-defined, uniform embossing of the wrapping material strip, preventing it from being pulled into the embossing geometry and allowing for precise plastic deformation and consistent width, which is essential for producing rod-shaped articles like tobacco or filter materials.
Implementation Method 1
allowing for precise plastic deformation
Data Source
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AI summary
The embossing roller (34,35) has an encircling embossing geometry that is provided with alternating grooves and projections. The projections are extended in circumferential direction of the embossing roller. The groove and/or projection in an outer portion of the embossing geometry are more intense pronounced than the groove and/or projection in an inner area of the embossing geometry. The edges between the grooves are arranged in radial manner to the grooves of adjacent projections. Independent claims are included for the following: (1) embossing device; and (2) device for processing wrapping material strip for rod-shaped article of tobacco processing industry.