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Tire tread comprising incisions

A tire tread, tread technology, applied in the direction of tire tread/tread pattern, tire parts, transportation and packaging, etc., can solve the problems of expensive and not easy molding / demolding operations

Active Publication Date: 2018-08-03
OCIETE DE TECH MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production of the threads in the pattern requires complex molds where the molding / demoulding operations are expensive and not very easy

Method used

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  • Tire tread comprising incisions
  • Tire tread comprising incisions
  • Tire tread comprising incisions

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0031] definition

[0032] In order to calculate the roughness Rz of a surface, a given length called the evaluation length Ln of the surface to be evaluated is divided into n basic lengths Lz of equal length, as image 3 shown. At each of these basic lengths, a respective profile height Rzi is determined, which is the sum of the maximum value of the protrusion height and the maximum value of the recess depth of the profile of the surface within the basic length Lzi. The mean height Rz is the arithmetic mean (standard DIN 4768; 1990) of the individual values ​​Rzi over all the basic lengths considered and is expressed by the following formula:

[0033]

[0034] In order to calculate the roughness RA of the surface, as Figure 4 As shown, RA: is the arithmetic mean of all ordinates of the profile within the basic length according to the following formula, which is:

[0035]

[0036] "Tire" means an elastic tread of all types, whether or not it is subjected to internal ...

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PUM

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Abstract

The invention relates to an elastomeric tire tread (1) comprising a tread surface intended to come into contact with a roadway while said tire is in motion, said tread including a plurality of through-indentations in the tread surface, each indentation comprising an incision (3) defined by first mutually facing walls (4) and an expansion area (5) defined by second walls (6) expanding said incisionalong the depth of the tread, the roughness of the first walls (4) being different from the roughness of said second walls (6) of material.

Description

technical field [0001] The present invention relates to motor vehicle tire treads. The invention relates more particularly to tire treads provided with sipes. Background technique [0002] Document EP1015261 describes a tread pattern for a tread and more particularly describes a tread pattern that changes as the tread wears. Furthermore, according to a particular embodiment, this document presents a block provided with a channel, the profile of which is O-shaped or drop-shaped. This channel communicates with a sipe extending up to the tread. The sipe follows a course that forms a series of broken lines. [0003] Document EP0564435 presents a tire tread provided with profiled elements such as blocks, ribs extending in the circumferential direction or similar arrangements provided with thin sipe cuts and / or grooves, the thin Opposite wall regions of the sipe cuts and / or grooves have a three-dimensional structure which differs at least in part due to the presence of surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/12
CPCB60C11/1281B60C11/0008B60C11/0323
Inventor E·布朗切特S·皮舒尔
Owner OCIETE DE TECH MICHELIN
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