Tire comprising cables for reinforcing the casing having low perviousness, and textile threads associated with the casing reinforcement
A technology of crown reinforcements and reinforcements, which is applied in the direction of heavy-duty tires, special tires, tire parts, etc., can solve the problems of reduced durability, and achieve the effects of improved durability, favorable costs, and material savings
Inactive Publication Date: 2014-08-27
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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Problems solved by technology
[0021] However, it was found that under particularly severe running conditions (in particular in terms of load and temperature), the tires thus manufactured have an improved durability compared to tires which do not include said associated textile threads on at least one layer of the carcass reinforcement. Sexually reduced performance
Method used
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[0101] The figures are not drawn to scale for ease of understanding.
[0102] figure 1 Only a half-view of a tire is shown, which extends symmetrically with respect to an axis XX' representing its circumferential median plane or equatorial plane.
[0103] in the figure 1 , a tire 1 of size 315 / 70R22.5 comprises a radial carcass reinforcement 2 anchored in two beads 3 around a bead wire 4 forming a turn-up 5 . The carcass reinforcement 2 is formed of a single layer of metal cords. The carcass reinforcement 2 is separated from its turn-up by a rubber compound 8 arranged radially outside the bead wire 4 . The carcass reinforcement 2 is sheathed by a crown reinforcement 6 , which is itself covered by a tread 7 . The crown reinforcement 6 is formed radially from the inside to the outside as follows:
[0104] - a first working layer formed of non-clad, non-extensible metal cords 11.35 continuous over the entire width of the ply and oriented at an angle equal to 18°,
[0105]...
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Abstract
The invention relates to a tire having a radial casing reinforcement (2), consisting of at least one layer of metal reinforcement elements, including a crown reinforcement (6) that is radially covered by a tread (7) that is joined to two beads via two sidewalls. Said metal reinforcement elements are cables having a flow rate of less than 20 cm3 / min in the perviousness test. At least one layer of the casing reinforcement is provided on at least one surface of staple textile threads (12), one end (17) of a textile thread being positioned on the turn-up (5) of the casing reinforcement around rods (4), and the other end (13) being radially inside the orthogonal projection (9) of the shoulder end (11) on said surface of said layer of the casing reinforcement.
Description
technical field [0001] The present invention relates to tires with radial carcass reinforcement, in particular tires intended to equip vehicles carrying heavy loads traveling at sustained speeds, such as trucks, tractors, trailers, or buses. Background technique [0002] Usually, in tires of the heavy-duty type, the carcass reinforcement is anchored on either side in the bead area and is radially covered by a crown reinforcement consisting of at least two superimposed The layers are formed by threads or cords parallel in each layer and crossing from one layer to the next so as to form an angle with the circumferential direction of between 10° and 45°. Said working layer forming the working reinforcement may also be covered by at least one "protective" layer, advantageously formed by metallic and stretchable (called elastic) reinforcing elements. It may also comprise a layer of low-stretch metal threads or cords forming an angle between 45° and 90° with the circumferential d...
Claims
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IPC IPC(8): B60C9/08
CPCY10T152/10801B60C9/005B60C2009/2016B60C2009/0466B60C15/0009B60C9/20B60C2009/0215B60C9/04B60C2009/2019B60C2009/2022B60C2009/0425B60C2009/0475B60C9/08B60C2200/06B60C2009/0416B60C1/0041B60C9/0207
Inventor C·卡福I·德迈B·若
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN