Electrical cable with self-repairing protection and apparatus for manufacturing the same
View Patent ↗An electrical cable includes a conductor, an outer sheath, and a self-repairing material layer between the conductor and outer sheath. The self-repairing material layer is distributed around the conductor in a discontinuous manner. An anchor portion is formed between the conductor and the outer sheath.
1. A method of manufacturing electrical cables with self-repairing protection, comprising:
externally applying an outer coating sheath around at least one conductor;
applying at least one layer of self-repairing material between the conductor itself and the outer coating sheath;
forming at least one interruption region in the extension of said layer of self-repairing material; and
disposing at least one anchoring portion between the conductor and the outer coating sheath at said interruption region.
2. The method of claim 1 , wherein said interruption region of the extension of the self-repairing material layer is formed by removing part of the self-repairing material distributed around the conductor.
3. The method of claim 2 , wherein a plurality of said interruption regions homogenously distributed around the conductor is formed, a plurality of anchoring portions being disposed each at one of said interruption regions.
4. The method of claim 1 , wherein during the step of applying said self-repairing material layer, the self-repairing material layer is directly applied to the conductor and during the step of arranging said at least one anchoring portion, the at least one anchoring portion is directly placed on the conductor.
5. The method of claim 1 , further comprising, before the step of applying the self-repairing material layer, applying at least one inner coating layer to the conductor.
6. The method of claim 5 , wherein during the step of applying said self-repairing material layer, the self-repairing material layer is put directly into contact with the inner coating layer and during the step of disposing said at least one anchoring portion, the at least one anchoring portion is put directly into contact with said inner coating layer.
7. The method of claim 1 , wherein said at least one anchoring portion is put directly into contact with said outer coating sheath.
8. The method of claim 1 , wherein the steps of applying said at least one anchoring portion and applying said outer coating sheath are performed simultaneously, using the same material, to define one single body circumscribing the conductor.
9. The method of claim 5 , wherein said inner coating layer, said at least one anchoring portion and said outer coating sheath are made of one and the same coating material in the form of a unitary body.