Self-tensioning drum covering for corrugating machines
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Solution Overview
Problem
Existing corrugating machines require time-consuming and hazardous processes to change drum coverings, leading to machine downtime and safety risks, with rubber-coated drums needing full replacement when worn.
Innovation Solution
A self-tensioning drum covering with a textile carrier material that reversibly shrinks when heated, coated on one or both sides with a material like silicone, ensuring secure adhesion and easy removal without adhesives, allowing for quick application and replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drum coverings are fixedly adhered on drive drums using adhesives, then optimal force transfer is achieved, but significant health risks and time-consuming processes occur during changeover
Solution Approach 1:
The adhesive layer is completely removed from the drum covering structure. Instead of using adhesives to fix the covering, the invention uses a self-tensioning textile carrier material that mechanically secures itself to the drive drum through its shrinking properties, eliminating the harmful adhesive substance entirely.
Solution Approach 2:
The chemical bonding mechanism (adhesive) is replaced with a mechanical self-securing mechanism. The textile carrier material's reversible shrinking when heated creates mechanical tension that secures the covering to the drum without requiring chemical adhesives, thus eliminating health risks while maintaining force transfer.
2Reliability
If drum coverings are fixedly adhered on drive drums, then optimal force transfer is achieved, but the changeover process becomes time-consuming and requires machine shutdown
Solution Approach 1:
The adhesive layer is completely removed from the drum covering structure. Instead of using adhesives to fix the covering, the invention uses a self-tensioning textile carrier material that mechanically secures itself to the drive drum through its shrinking properties, eliminating the harmful adhesive substance entirely.
Solution Approach 2:
The chemical bonding mechanism (adhesive) is replaced with a mechanical self-securing mechanism. The textile carrier material's reversible shrinking when heated creates mechanical tension that secures the covering to the drum without requiring chemical adhesives, thus eliminating health risks while maintaining force transfer.
3Reliability
If rubber-coated drive drums are used, then force transfer is improved, but the whole drum must be changed when the rubber covering is worn away
Solution Approach 1:
The drive drum system is segmented into two separable components: the metal drive drum core and the textile drum covering. The covering can be independently removed and replaced by loosening the fixing elements, while the drum core remains reusable. This allows replacement of only the worn covering rather than the entire drum assembly.
Solution Approach 2:
The connection between the drum covering and drive drum is made dynamic rather than permanent. Fixing elements allow the covering to be securely attached during operation for optimal force transfer, but easily removed when worn, enabling flexible maintenance without permanent bonding.
4Reliability
If drum coverings are securely fixed on drive drums, then force transfer is optimized, but removal becomes difficult and hazardous
Solution Approach 1:
The connection between the drum covering and drive drum is made dynamic rather than permanent. Fixing elements allow the covering to be securely attached during operation for optimal force transfer, but easily removed when worn, enabling flexible maintenance without permanent bonding.
Solution Approach 2:
The tension parameter of the drum covering is changed through temperature variation. When heated, the textile carrier material shrinks and increases tension to secure the covering; when cooled, the tension decreases, allowing easy removal by simply loosening fixing elements without hazardous mechanical tasks.
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 drum covering provides optimal force transfer and wear resistance, reducing the need for frequent replacements and minimizing downtime, while ensuring safety by allowing for easy installation and removal without mechanical hazards.
Implementation Method 1
a textile carrier material that reversibly shrinks when it heats up
Implementation Method 2
The coating material fulfils two functions. On the one hand, it prevents the upper belt or lower belt from slipping from a drive drum that is covered with the drum covering.
Data Source
AI summary
A drum covering for a drive drum (21) in a corrugating machine has a textile carrier material that reversibly shrinks when heated up, said carrier material being coated on at least one side with a coating material. Furthermore, it has two rectangular regions (71, 72) that are each connected to a convexly deltoid-shaped region (6) on a narrow side. Sets for producing the drum covering contain several covering pieces. A drive drum provided with the drum covering can be produced by the central axis (M) of the convexly deltoid-shaped region (6) being arranged along the circumferential central axis of the drive drum (21). Then, the convexly deltoid-shaped region (6) is fixed on the drive drum surface by means of at least one fixing element. The drive drum (21) is rotated, wherein the rectangular regions (71, 72) of the drum covering are wound around the drive drum (21) in a spiral-shaped manner. The rectangular regions (71, 72) are cut off on the ends of the drive drum (21) and the ends of the rectangular regions (71, 72) are fixed on the drive drum surface by means of further fixing elements. This drive drum can be installed in a corrugating machine in such a way that the rectangular regions (71, 72) are wound around the drive drum against the rotational direction of the drive drum (21) when the corrugating machine is in operation.