Hollow Axis Roller With Metal Inserts For Uniform Embossing
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Solution Overview
Problem
Existing embossing/laminating rollers suffer from uneven deformation under load, leading to suboptimal engraving distribution on paper products, and existing solutions either increase production costs or are complex and not compatible with traditional machinery.
Innovation Solution
The embossing/laminating roller features a centrally hollow tubular element with metal inserts and an externally fitted tubular jacket, allowing even deformation under load and easy interchangeability with traditional rollers, while maintaining high reliability and resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional solid roller design is used, then structural simplicity is maintained, but uneven deformation under load occurs leading to poor engraving distribution
Solution Approach 1:
The roller is divided into three main segments: a central hollow axis, a tubular jacket fitted over the axis, and metal inserts positioned within the jacket. This segmentation allows each component to perform its specific function - the hollow axis provides structural support, the jacket carries the engravings, and the inserts provide localized reinforcement to control deformation patterns under load, thereby achieving uniform engraving distribution.
Solution Approach 2:
The roller employs a composite structure combining different materials: the central axis is made of one material, the tubular jacket is made of another material, and metal inserts are positioned between them. This composite design allows optimization of each material's properties for its specific role, creating a roller that deforms evenly under load while maintaining structural integrity and enabling precise engraving distribution.
2Manufacturing precision
If roller pressure is increased to improve embossing quality, then engraving depth is improved, but flexural deformation increases causing uneven load distribution
Solution Approach 1:
Metal inserts are strategically positioned at specific locations within the tubular jacket, particularly at zones subject to higher stress during embossing. This local reinforcement creates areas of enhanced stiffness where needed, allowing the roller to maintain even load distribution across its surface while still achieving sufficient engraving depth and quality under increased pressure.
3Manufacturing precision
If roller deformation is reduced to maintain even engraving, then engraving uniformity is improved, but production costs increase due to specialized designs
Solution Approach 1:
The roller design accommodates controlled elastic deformation under load rather than attempting to eliminate it entirely. The hollow axis and metal insert configuration allows the roller to deform in a predictable, even manner that maintains uniform engraving quality. This dynamic approach is more economical than rigid designs because it uses standard manufacturing processes and materials while achieving the desired precision.
4Manufacturing precision
If complex roller designs are used to eliminate deformation, then engraving evenness is improved, but device complexity and maintenance costs increase
Solution Approach 1:
The segmented design with a hollow axis, tubular jacket, and metal inserts creates a modular structure that is easier to manufacture and maintain than monolithic complex designs. Each segment can be produced separately using standard processes, assembled together, and replaced independently if needed, reducing overall device complexity while achieving even engraving through controlled deformation characteristics.
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 even engraving distribution, reduces maintenance costs, and allows seamless integration with existing machinery, enhancing production quality and efficiency.
Implementation Method 1
the tubular jacket (36) with a central band (37), whose diameter corresponds to that of the central band (33) of the annular element (32) and which allows a stiffening of the structure suitable for avoiding or substantially lowering the deformation of the external tubular jacket (36)
Data Source
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AI summary
An improved embossing/laminating roller (30), especially suitable for use in embossing/laminating or calendering apparatuses for the processing of tissue paper products such as toilet paper or all-purpose absorbent paper or nonwoven fabric products and similarly suitable for hygiene and sanitary use, comprising a central axis (31) apt to be set in rotation by means of a motion transmission device and externally and coaxially whereto a tubular jacket (36) is fitted, with said central axis (31) and tubular jacket (36) comprising reciprocal rigid restraint means, with said means cooperating for a transmission of motion between said central axis comprising a centrally hollow tubular element and said tubular jacket.