Drum for producing a tire, provided with retractable sectors
AssigneesCompagnie Generale Des Etablissements Michelin, Michelin Recherche et Technique S.A.
InventorsJean-Claude Delorme, Dominique Leblanc, Michel Druet
Life of this patent
Estimating the term…
Abstract
A drum for building a green tire casing having: sectors that form a circumferential face of the drum, and at least one cam for controlling a radial movement of the sectors with respect to a rotation axis of the drum. The cam has two main faces and is designed such that a monotonous movement of the cam first of all causes the radial movement of some of the sectors by virtue of ramps situated on its first face without modifying a radial position of the other sectors, and then causes the radial movement of the other sectors by virtue of ramps situated on its second face, the movement of all of the sectors then being simultaneous.
Claims11
A drum for building a green tire casing, comprising:
- a plurality of sectors that form a circumferential face of the drum,
- said plurality of sectors including a first set of sectors and a second set of sectors,
- a cam with a first face and a second face for controlling a radial movement of the plurality of sectors with respect to a rotation axis of the drum,
- the cam being designed such that a monotonous movement of the cam first of all causes the radial movement of the first set of sectors by virtue of ramps solely situated on the first face without modifying a radial position of the second set of sectors, and then causes the radial movement of the second set of sectors by virtue of ramps solely situated on the second face, the radial movement of all of the plurality of sectors then being simultaneous.
A drum for building a green tire casing, comprising:
- a plurality of sectors that form a circumferential face of the drum,
- said plurality of sectors including a first set of sectors and a second set of sectors,
- a cam for controlling a radial movement of the plurality of sectors with respect to a rotation axis of the drum,
- the cam having at least two main faces including a first main face and a second main face and the cam being designed such that a monotonous movement of the cam first of all causes the radial movement of the first set of sectors by virtue of ramps situated on the first main face without modifying a radial position of the second set of sectors, and then causes the radial movement of the second set of sectors by virtue of ramps situated on the second main face, the radial movement of all of the plurality of sectors then being simultaneous, and
- wherein at least some of the plurality of sectors are mounted in a movable manner with respect to a support in a predetermined direction that is not radial with respect to a rotation axis and intersects the rotation axis.
A drum for building a green tire casing, comprising:
- a plurality of sectors that form a circumferential face of the drum,
- the plurality of sectors including a first set of sectors and a second set of sectors,
- a cam for controlling a radial movement of the plurality of sectors with respect to a rotation axis of the drum,
- the cam having at least two main faces including a first main face and a second main face and the cam being designed such that a monotonous movement of the cam first of all causes the radial movement of the first set of sectors by virtue of ramps situated on the first main face without modifying a radial position of the second set of sectors, and then causes the radial movement of the second set of sectors by virtue of ramps situated on the second face, the radial movement of all of the plurality of sectors then being simultaneous, and
- further including at least one set of equipment that is mounted in a sliding manner with respect to a support in the direction of a rotation axis and is connected to at least some of the plurality of sectors.
Dependencies are inferred from the claim text.