Process for manufacturing an antenna for an electronic device in a tyre
View Patent ↗During a process for manufacturing an antenna, which includes a core of filiform shape and which is intended to be integrated into a rubber compound of a tyre, the core is coated with a coating made of a material different from a material of the core. After the core is coated, at least one portion of the coated core is plastically deformed.
1. A process for manufacturing an antenna, which includes a core and which is intended to be integrated into a rubber compound, the process comprising steps of:
coating the core with a coating made of a material different from a material of the core, wherein the core has a filiform shape; and,
after the coating step, plastically deforming the coated core,
wherein the step of coating the core includes directly coating the core with an electromagnetic-signal conduction layer.
2. The process according to claim 1 , wherein the core is made of steel.
3. The process according to claim 1 , wherein the step of plastically deforming the portion of the coated core includes deforming the coated core to have a helicoidal shape.
4. The process according to claim 1 , wherein the conduction layer is made of a substantially pure metal.
5. The process according to claim 1 , wherein the conduction layer is made of copper.
6. The process according to claim 1 , wherein the step of coating the core includes coating the core with a chemical isolation layer intended to chemically isolate the rubber compound from an object coated by the isolation layer.
7. The process according to claim 6 , wherein the step of coating the core includes coating the core with an electromagnetic-signal conduction layer, with the isolation layer directly coating the conduction layer.
8. The process according to claim 6 , wherein the isolation layer is made of a substantially pure metal or a metal alloy chosen from: zinc, nickel, tin, and brass.
9. The process according to claim 6 , further comprising a step of coating the isolation layer with an external adhesion layer for promoting adhesion of the antenna to the rubber compound.
10. The process according to claim 9 , wherein the external adhesion layer is made of at least one substantially pure metal or a metal alloy chosen from: zinc, nickel, and brass.
11. The process according to claim 9 , wherein the external adhesion layer includes a non-metallic adhesive material.
12. The process according to claim 9 , wherein the step of coating the isolation layer includes directly coating the isolation layer with the adhesion layer.
13. The process according to claim 1 , wherein the step of coating the core includes coating the core with an electromagnetic-signal conduction/chemical isolation layer formed of a metal alloy.
14. The process according to claim 13 , wherein the metal alloy is brass.
15. The process according to claim 13 , wherein the step of coating the core includes directly coating the core with the electromagnetic-signal conduction/chemical isolation layer.
16. The process according to claim 13 , further comprising a step of coating the electromagnetic-signal conduction/chemical isolation layer is coated with an external adhesion layer for promoting adhesion of the antenna to the rubber compound.
17. The process according to claim 16 , wherein the external adhesion layer is made of at least one substantially pure metal or a metal alloy chosen from: zinc, nickel, and brass.
18. The process according to claim 16 , wherein the external adhesion layer includes a non-metallic adhesive material.
19. The process according to claim 16 , wherein the step of coating the electromagnetic-signal conduction/chemical isolation layer includes directly coating the electromagnetic-signal conduction/chemical isolation layer with the adhesion layer.
20. The process according to claim 1 , further comprising a step of, after the coating of the core, heating the antenna to perform a heat treatment.