Oscillating Roll Jacket for Uniform Paper Embossing
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Solution Overview
Problem
Current rolls used in the treatment of ribbonlike paper material, particularly in embossing processes, suffer from bending due to pressure coupling, leading to non-uniform treatment and failure to meet high-quality standards, with existing solutions being complex, costly, or impractical.
Innovation Solution
A roll design featuring a central axis with oscillating bearings and a torsionally integral external jacket, using flexible organs to compensate deformation and maintain parallel alignment, allowing for uniform pressure distribution and reduced bending while maintaining interchangeability with traditional rolls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single cylindrical body roll is used, then the structure is simple and easy to manufacture, but the roll bends under pressure causing non-uniform treatment of paper
Solution Approach 1:
The roll is divided into a fixed central axis and a separate oscillating jacket that can rotate independently. This segmentation allows the jacket to compensate for bending forces while the axis remains stable, resolving the contradiction between structural simplicity and treatment uniformity.
Solution Approach 2:
The jacket is made dynamic by allowing it to oscillate and rotate independently on oscillating bearings. This dynamic capability enables the jacket to adapt to pressure variations and maintain uniform paper treatment, overcoming the static limitation of traditional single-body rolls.
2Manufacturing precision
If rounded rubber rolls are used to compensate bending, then embossing uniformity improves, but special rolls are needed for different pressure ranges increasing cost and complexity
Solution Approach 1:
The oscillating jacket design provides a universal solution that works across different pressure ranges. The jacket's natural oscillation capability eliminates the need for different rounded roll designs for different pressures, reducing device complexity while maintaining embossing uniformity.
3Stability of the object's composition
If pressure from rubber roll is reduced to minimize bending, then roll deformation decreases, but embossing becomes less marked and product thickness is limited
Solution Approach 1:
The oscillating jacket can dynamically adjust to higher pressures without suffering from bending instability. The oscillation mechanism absorbs pressure variations, allowing marked embossing while maintaining roll alignment, thus resolving the contradiction between stability and embossing quality.
4Manufacturing precision
If skewing arrangements or oblique axis rolls are used to uniform incision, then paper treatment uniformity improves, but mechanical complexity and production cost increase significantly
Solution Approach 1:
Instead of making the axis oblique or skewing the mechanical arrangement, the invention inverts the approach by keeping the axis fixed and simple while making the jacket oscillate. This achieves uniform incision through the jacket's motion rather than through complex axis positioning.
5Manufacturing precision
If oscillating bearings with fixed central axis are used, then roll bending is relieved and jacket remains parallel, but assembly difficulties and bearing heating occur
Solution Approach 1:
The invention extracts the oscillation function from the central axis and places it in the jacket. This allows the axis to remain simple and easy to assemble while the jacket handles the oscillation, reducing bearing heating and assembly complexity while maintaining jacket parallelism.
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 achieves uniform treatment of paper, reduces wear and assembly complexities, and maintains compatibility with existing machines, ensuring high-quality embossing and compression processes.
Implementation Method 1
Between the outer jacket and central axis inside this, there are two oscillating and non-rotating connection organs 15, such as supports, situated at a distance from each other shorter than the table of the whole roll. These oscillating and non-rotating connection organs 15 allow the deformation of the axis 12 to be compensated
Implementation Method 2
The central axis 12 and tubular jacket 14 are made torsionally integral through one or more joints or flexible organs 16, capable of transmitting a torque
Data Source
Figure 1~2
Figure 3
Figure 4~6
AI summary
A roll for devices for the treatment of ribbonlike paper material comprising a central axis (12) on which a coaxial tubular jacket (14; 22, 23) is fitted, among which two oscillating and non-rotating connection organs (15) are positioned, the central axis (12) of the roll comprising at opposite ends, oscillating bearings (13) housed in a supporting structure (17), wherein the central axis (12) and jacket (14; 22, 23) are both rotating and are also made torsionally integral by means of at least one flexible organ (16; 34, 35, 36) capable of transmitting a torque. A device for the treatment of ribbonlike paper material is also envisaged, which is equipped with a pair of rolls (20, 21) opposed as specified above, wherein a first roll is a roll with a tubular steel jacket (22) and a second roll is a roll with a tubular rubber jacket (23).