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Tire comprising carcass reinforcement wires having different perviousnesses

A technology of crown reinforcement and reinforcement, which is applied to the reinforcement layer of pneumatic tires, heavy tires, tire parts, etc., can solve the problems of unacceptable manufacturing cost and low productivity, and achieve high productivity, beneficial cost and durability Improved effect

Inactive Publication Date: 2012-07-25
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Manufacturing costs can become unacceptable simply because of low productivity

Method used

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  • Tire comprising carcass reinforcement wires having different perviousnesses
  • Tire comprising carcass reinforcement wires having different perviousnesses
  • Tire comprising carcass reinforcement wires having different perviousnesses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0157] exist figure 1 , a tire 1 of size 315 / 70R 22.5 comprises a radial carcass reinforcement 2 anchored in two beads 3 around bead wires 4 . The carcass reinforcement 2 is formed of a single layer of metal cables. The carcass reinforcement 2 is hooped with a crown reinforcement 5 which itself is covered with a tread 6 . The crown reinforcement 5 is formed radially from the inside to the outside as follows:

[0158] - a first working layer formed of unwrapped non-extensible metal cables 11.35 continuous over the entire width of the ply and oriented at an angle of 18°,

[0159] - a second working layer formed by unwrapped non-extensible metal cables 11.35 continuous across the entire width of the ply, oriented at an angle of 18° and crossing the metal cables of the first working layer ,

[0160] - A protective layer formed from 6x35 elastic metal cables.

[0161] These layers constituting the crown reinforcement 5 are not all specifically shown in the drawings.

[0162]...

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Abstract

The invention relates to a tire having a radial carcass reinforcement (2), consisting of at least one layer of metal reinforcement elements (7a), said tire including a top reinforcement (5) that is in turn radially covered by a tread, said tread being joined to two beads via two sidewalls. According to the invention, at least 70 % of the metal reinforcement elements of at least one layer of the carcass reinforcement are non-spliced cables exhibiting, under the so-called perviousness test, a flow rate lower than 2 cm3 / min, and at least 10 % of the metal reinforcement elements of said at least one layer of the carcass reinforcement are cables exhibiting, under the so-called perviousness test, a flow rate higher than 4 cm3 / min.

Description

technical field [0001] The present invention relates to tires with radial carcass reinforcement, in particular to tires intended to be fitted on vehicles carrying heavy loads and traveling at sustained speeds, such as trucks, tractors, trailers, or highway buses. Background technique [0002] Usually, in tires of the heavy vehicle tire type, the carcass reinforcement is anchored on both sides in the bead area and is radially covered by a crown reinforcement consisting of at least two superposed layers and Formed from threads or cables that are parallel within each layer and cross between layers forming an angle with the circumferential direction of between 10° and 45°. Said working layer forming the working reinforcement can also be covered by at least one so-called protective layer consisting of advantageously metallic and extensible reinforcing elements, such reinforcing elements being called elastic elements. It may also comprise a layer of wires or cables of low ductili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/00B60C9/08D07B1/16
CPCD07B2201/2031B60C2019/008D07B1/062D07B2201/2046D07B2201/2025B60C9/0007B60C2200/06D07B2201/2059D07B2501/2046D07B2201/2028D07B2201/2077D07B1/0633D07B1/0626B60C9/08D07B2201/2006Y10T152/10855D07B2801/12B60C2009/0483B60C9/13B60C2009/0416
Inventor A·多明戈C·肖莱S·诺埃尔M·科涅
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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