Steel Rope Coating via Reversible Compression
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Solution Overview
Problem
Conveyor belts with steel cord constructions face challenges in achieving complete rubber coating, leading to open cavities that allow liquids to migrate and cause corrosion, especially in larger rope diameters and closed constructions, resulting in premature failure.
Innovation Solution
A method involving brief reversible compression of the tension member during coating in an immersion bath, combined with negative pressure and optional mechanical or physical opening, allows the coating composition to penetrate fully into the rope construction, reducing open cavities and enhancing sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the rope diameter is increased to achieve higher load capacity, then the conveying capacity is improved, but the rubber coating penetration becomes more difficult and incomplete coating occurs
Solution Approach 1:
The rope construction is pre-compressed before the rubber coating is applied, creating temporary access paths through the cable structure. This preliminary compression action enables the rubber coating to penetrate into the interior regions before the rope returns to its original configuration, solving the problem of incomplete coating in large diameter ropes.
Solution Approach 2:
The invention introduces dynamic compression during the coating process, where the rope construction is temporarily compressed and then allowed to relax. This dynamic approach creates time-dependent access paths that enable complete rubber penetration, transforming a static coating problem into a dynamic process solution.
2Productivity
If simple dipping and pulling out is used for coating, then the process is simple and fast, but complete penetration of the rope construction with coating composition is not achieved
Solution Approach 1:
The compression of the rope construction is performed as a preliminary action before the rubber coating is applied during the dipping process. This pre-compression creates the necessary access paths that allow the coating composition to penetrate completely into the rope interior, maintaining process speed while achieving complete coating penetration.
3Manufacturing precision
If the rope construction is compressed during coating, then complete penetration is achieved, but the cable construction may suffer disadvantages
Solution Approach 1:
The compression is applied periodically and temporarily during the coating process, followed by a relaxation phase that allows the rope to return to its original configuration. This periodic compression-relaxation cycle enables complete coating penetration while preventing permanent damage to the cable construction, as the rope has time to recover between compression events.
Solution Approach 2:
The brief compression duration and controlled timing serve as a cushioning approach, where the compression is applied just long enough to create access paths for coating penetration, but not so long or intense as to cause permanent damage. The rapid relaxation afterward cushions any potential stress on the cable construction.
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 method ensures complete rubber penetration, reducing liquid migration and oxidation, thereby extending the service life and reliability of steel cord conveyor belts by ensuring a robust and sealed rope construction.
Implementation Method 1
the coating composition can penetrate fully into the rope construction
Implementation Method 2
combined with negative pressure and optional mechanical or physical opening
Implementation Method 3
the compression must be reversible to allow the rope to return to its original configuration
Implementation Method 4
After compression, the rope construction relaxes naturally, during which time the coating mass can flow into the rope construction
Data Source
Figure 1~2
AI summary
The invention relates to a method for coating a tension member, in particular for conveyor belts, in particular a tension member which is in the form of a steel rope. The method according to the invention allows complete penetration of the tension member structure. The method comprises at least the following steps: - reversible compression of the tension member (2), which is designed in the form of a rope structure (2), during coating for a short time and - penetration of the coating mass into the opened rope structure (2), the rope (2) being completely penetrated.