Lubricant-Powder Multicore Cable for Easier Sheath Stripping
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Solution Overview
Problem
Multicore cables without wrapping tape between the outer sheath layer and covered wires face issues with moisture ingress and poor stripping properties, leading to demands for improved stripping and flexing resistance.
Innovation Solution
A multicore cable design featuring lubricant powder on the surfaces of covered wires, ensuring a coverage of at least 15% to facilitate direct contact with the outer sheath layer, enhancing stripping properties and flexing resistance without the need for a wrapping tape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wrapping tape is disposed between the covered wires and the outer sheath layer, then moisture ingress is prevented, but stripping properties deteriorate
Solution Approach 1:
The invention removes the wrapping tape from the cable structure, allowing the outer sheath layer to directly contact the covered wires. This extraction of the problematic wrapping tape eliminates the stripping issue while moisture resistance is maintained through alternative means (proper sheath layer selection and coverage control)
Solution Approach 2:
The invention controls the coverage of lubricant powder on covered wires within a specific range (5-50 mass %) to optimize both moisture resistance and stripping properties. By adjusting the powder coverage parameter, the system achieves a balance where the outer sheath layer can directly contact wires for good stripping while still providing adequate moisture protection
2Ease of operation
If the coverage of lubricant powder on covered wires is increased, then stripping properties improve, but powder scattering increases
Solution Approach 1:
The invention optimizes the lubricant powder coverage within a specific range (5-50 mass %) to achieve the desired stripping properties while minimizing powder scattering. This parameter optimization ensures sufficient lubrication for easy stripping without excessive powder that would scatter during handling and installation
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 lubricant powder coverage improves the ease of stripping the outer sheath layer and reduces force on the wires during bending, thereby enhancing the cable's processability and flexing resistance, while minimizing powder scattering.
Implementation Method 1
a lubricant powder provided on surfaces of a plurality of covered wires; and an outer sheath layer covering outer surfaces of the plurality of covered wires, wherein the outer surfaces of the plurality of covered wires, and the outer sheath layer, make contact with one another via the lubricant powder
Data Source
AI summary
A multicore cable includes a plurality of covered wires having a lubricant powder provided on surfaces thereof, and an outer sheath layer covering outer surfaces of the plurality of covered wires. The outer surfaces of the plurality of covered wires, and the outer sheath layer, make contact with one another via the lubricant powder. A coverage of the outer surfaces of the plurality of covered wires by the lubricant powder is greater than or equal to 15%.