Drum for producing a tire, provided with mobile sectors
AssigneesCompagnie Generale Des Etablissements Michelin, Michelin Recherche et Technique S.A.
InventorsJean-Claude Delorme, Dominique Leblanc, Michel Druet
Life of this patent
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Abstract
A drum for producing a tire casing blank comprises a support and sectors forming a circumferential face of the drum. Each sector has a circumferential outer face having a contour of general trapezoidal form and is mounted so as to be movable relative to the support in a non-radial predetermined direction relative to an axis of rotation of the drum and intercepting this axis.
Claims16
A drum for producing a tire casing blank, which comprises a support and sectors forming a circumferential face of the drum, each sector having a circumferential outer face having a contour of generally trapezoidal form, said drum comprising a first mechanism able to move each sector relative to the support in a first respective non-radial predetermined direction relative to an axis of rotation of the drum and intercepting this axis, and said drum comprising a second mechanism able to move each sector relative to the support in a second respective radial direction relative to the axis of rotation of the drum, and wherein the second mechanism can be activated independently of the first mechanism.
A drum for producing a tire casing blank, which comprises a support and sectors forming a circumferential face of the drum, each sector having a circumferential outer face having a contour of generally trapezoidal form and being mounted so as to be movable relative to the support in a respective non-radial predetermined direction relative to an axis of rotation of the drum and intercepting this axis, wherein each sector has two principle planar lateral faces arranged in order to be placed opposite the homologous faces of adjacent ones of the sectors, wherein a plane of each lateral face is an image of a radial plane relative to the axis of rotation through a first rotation about a first axis (a1) perpendicular thereto, and through a second rotation about a second axis (a2) perpendicular to the first axis, the two rotations each taking place over an angle of greater than 0° and less than 90°.
A drum for producing a tire casing blank, which comprises a support and sectors forming a circumferential face of the drum, each sector having a circumferential outer face having a contour of generally trapezoidal form and being mounted so as to be movable relative to the support in a respective non-radial predetermined direction relative to an axis of rotation of the drum and intercepting this axis, which comprises at least one cam for controlling a radial movement of the sectors relative to the axis of rotation of the drum, a cam of the at least one cam being arranged such that a monotonous movement of the cam gives rise, first, to the radial movement of some the sectors without modifying a radial position of other ones of the sectors, and then gives rise to the radial movement of all the sectors simultaneously.
Dependencies are inferred from the claim text.