Guide for a sliding door, in particular of a vehicle, and manufacturing method thereof

1. A guide for a sliding door of a vehicle, the guide comprising:

a first straight section,

a second straight section,

a curved section located between the first straight section and the second straight section,

a first portion having a substantially inverted U-shaped cross-section and comprising a first side wall, an intermediate wall and a second side wall facing said first side wall,

wherein the first straight section and the second straight section of the guide comprise an intermediate wall so realized as to comprise at least one corrugation,

and wherein the curved section of the guide comprises an intermediate wall so realized as to have a substantially straight extension in a sectional view.

2. The guide according to claim 1 , wherein said at least one corrugation is obtained through a step of profiling the guide such that that at least one corrugation includes a plurality of corrugations.

3. The guide according to claim 1 , wherein said substantially straight extension of the intermediate wall in the curved section is obtained through a step of stretching and bending the guide aimed at obtaining said curved section.

4. The guide according to claim 1 , wherein the first portion of the guide is adapted to receive at least one first rolling element associated with the door of said vehicle, said first rolling element being guided by the first side wall and by the second side wall of said first portion in order to accompany the door while going from a closed condition to an open condition and vice versa.

5. The guide according to claim 1 , further comprising a second portion which is substantially L-shaped and includes a first strip coupled to the first side wall of the first portion and a second strip facing the intermediate wall of the first portion.

6. The guide according to claim 5 , wherein said first straight section and second straight section of the guide comprise at least one additional corrugation obtained on said second portion of the guide.

7. The guide according to claim 6 , wherein said at least one additional corrugation is located substantially in correspondence of the coupling region between the first strip and the second strip of the second portion.

8. The guide according to claim 6 , wherein said at least one additional corrugation is obtained through a step of profiling the guide such that the at least one additional corrugation includes a connection section.

9. The guide according to claim 5 , wherein said first portion and said second portion are made as one piece, the guide being so realized as to comprise the connection section through which the first strip of the second portion is coupled to the first side wall of the first portion.

10. The guide according to claim 5 , wherein said second strip of the second portion constitutes a support surface for at least one second rolling element associated with the door of said vehicle, in such a way as to support the door of the vehicle while going from the closed condition to the open condition and vice versa.

11. A method for manufacturing a guide for a sliding door, of a vehicle, said method comprising at least one step a) of making said guide in a manner such that it comprises a first portion having a substantially inverted U-shaped cross- section and comprising a first side wall, an intermediate wall and a second side wall facing said first side wall, said first portion being so realized as to be adapted to receive at least one first rolling element associated with the door of said vehicle,

said method further comprising the following steps:

b) making said intermediate wall in a manner such that it has at least one corrugation;

c) obtaining a curved section of the guide through a step of stretching and bending said guide,

said step c) being so carried out as to utilize the material accumulated in said at least one corrugation to compensate for the elongation of the material occurring during said stretching and bending step.

12. The method according to claim 11 , wherein said step b) is carried out through a step of profiling the guide.

13. The method according to claim 11 , further comprising a step a1) of making said guide in a manner such that it comprises a second portion having a substantially L- shaped cross-section and including a first strip coupled to the first side wall of the first portion and a second strip facing the intermediate wall of the first portion, said second strip being adapted to create a support surface for at least one second rolling element associated with the door of said vehicle.

14. The method according to claim 13 , wherein said step a1) is carried out through a step a2) of making said second portion of the guide in a manner such that it has at least one additional corrugation substantially located in correspondence of the coupling region between the first strip and the second strip of said second portion, said step a2) being carried out through a step of profiling the guide.