Tire comprising casing reinforcement cables having a low perviousness, and variable rubber mixture thicknesses

A technology of rubber compound and tire crown reinforcement, which is applied to the reinforcement layer of pneumatic tires, heavy-duty tires, pneumatic tires, etc., can solve the problem of high tire cost and achieve the effect of low manufacturing cost

Active Publication Date: 2012-07-11
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As stated above, any increase, even locally, in the thickness of the rubber layer sepa

Method used

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  • Tire comprising casing reinforcement cables having a low perviousness, and variable rubber mixture thicknesses
  • Tire comprising casing reinforcement cables having a low perviousness, and variable rubber mixture thicknesses
  • Tire comprising casing reinforcement cables having a low perviousness, and variable rubber mixture thicknesses

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Experimental program
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Embodiment Construction

[0132] exist Figure 1a Among them, a tire 1 of type 315 / 70R 22.5 comprises a radial carcass reinforcement 2 anchored in two beads 3 around a bead wire 4 . The carcass reinforcement 2 is formed of a single layer of metal cords 11 and two calendered layers 13 . The carcass reinforcement 2 is hooped with a crown reinforcement 5 itself covered with a tread 6 . The crown reinforcement 5 is formed radially from the inside to the outside by:

[0133] - a first working layer formed of continuous non-hooped non-extensible metal cords 11.35 over the entire width of the ply, said cords being oriented at an angle of 18°;

[0134] - a second working layer formed over the entire width of the ply by continuous non-hooped inextensible metal cords 11.35 oriented at an angle of 18° and crossing the metal cords of the first working layer; and

[0135]- A protective layer formed of elastic metal cords 6×35.

[0136] All the layers making up the crown reinforcement 5 are not specifically show...

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Abstract

The invention relates to a tire having a radial casing reinforcement, consisting of at least one layer of metal reinforcement elements, said tire including a top reinforcement (5), itself radially covered with a tread (6), said tread being joined to two beads (3) via two sidewalls. According to the invention, the metal reinforcement elements of at least one layer of the casing reinforcement (2) are non-reinforced cables having, in the so-called perviousness test, a displacement of less than 20 cm3/mn, and in a radial plane, at least on a portion of the meridional profile of the tire, the rubber mixture thickness (E) between the inner surface of the tire cavity and the point of a metal reinforcement element of the casing reinforcement nearest to said inner surface of the cavity is less than or equal to 3.5 mm, and the rubber mixture thickness ratio between the inner surface of the tire cavity and the point of a metal reinforcement element of the casing reinforcement nearest said inner surface of the cavity of two separate portions of the tire is greater than 1.15.

Description

technical field [0001] The present invention relates to tires with radial carcass reinforcement, in particular to tires intended to equip heavy goods vehicles traveling at sustained speeds, such as trucks, tractors, trailers, or buses. Background technique [0002] Reinforcements for tires, especially heavy goods vehicle tires, are currently mostly formed by rolling back one or more plies, conventionally known as "carcass plies", "crown plies" Wait. This way of calling reinforcements derives from the manufacturing process that consists in producing a series of semi-finished products in the form of plies with generally longitudinal, thread-like reinforcing members assembled or stacked in succession to make up the tire blank. The plies are produced flat and of great size and subsequently cut to the dimensions of a given product. The components of the ply are also initially applied approximately flat. The green tire thus produced is then subjected to a forming operation so a...

Claims

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Application Information

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IPC IPC(8): B60C9/00B60C9/08B60C5/14
CPCB60C5/142B60C13/004B60C9/0007B60C2013/026B60C2200/06B60C2009/0425Y10T152/10855
Inventor A·多明戈C·肖莱
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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