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Method for improved bonding of tread edges for tire retreading operations

A tread and tire technology, applied in the direction of tire tread/tread pattern, special tires, tire parts, etc., can solve the problem of changing the curing size of the tread

Active Publication Date: 2016-11-30
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Also, the curing film tends to compress the tread, which may change the cured dimensions of the tread

Method used

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  • Method for improved bonding of tread edges for tire retreading operations
  • Method for improved bonding of tread edges for tire retreading operations
  • Method for improved bonding of tread edges for tire retreading operations

Examples

Experimental program
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Embodiment Construction

[0011] Particular embodiments of the invention include methods of forming retreaded tires and retreaded tires formed by the methods described herein.

[0012] A particular embodiment of such a method includes forming an unjoined retread tire comprising annularly disposing a precured tread about the periphery of an annular tire carcass in a joining layer comprising a joint layer disposed between the precured tread and the annular tire carcass. Uncured bonding material between bodies. The tread includes a pair of opposed tread edges spaced laterally to define the width of the pre-cured tread. The unjoined retread tire has a thickness extending between an inner side and an outer side of the unjoined retread tire. The annular tire carcass includes a pair of sidewalls spaced apart in the axial direction of the tire, each of the pair of sidewalls extending radially inward from the undertread portion toward the bead portion. The outside of an unjoined retreaded tire may also be des...

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PUM

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Abstract

Particular embodiments of the invention concerns methods of forming a retreaded tire with improved tread edge area bonding, and retreaded tires formed thereby. One embodiment of such methods includes forming an unbonded retreaded tire by arranging a pre-cured tread annularly around an annular tire carcass with a bonding layer arranged there between. The pre-cured tread includes a pair of opposing tread edges laterally-spaced to define a width of the pre-cured tread. The method also includes bonding the tread of the unbonded tire to the tire carcass to form a bonded retreaded tire by sufficiently pressurizing and heating the curing chamber to cure the bonding layer of the unbonded tire, which includes at least partially bonding a pair of laterally-spaced tread edge areas of the pre-cured tread to the tire carcass prior to an intermediate portion of the pre-cured tread located between the pair of laterally-spaced tread edge areas.

Description

technical field [0001] The present invention generally relates to methods and apparatus for making retreaded tires and treads for retreaded tires. More specifically, the present invention relates to methods and apparatus for curing retreaded tires without the need for a curing film. Background technique [0002] Retreaded tires consist of a new pre-cured tread attached to a pre-existing tire carcass. The tire carcass is prepared to receive the new pre-cured tread by removing the previous tread, such as by a buffing or grinding operation. The new pre-cured tread is then applied to the tire carcass in a bonding layer comprising a bonding material to secure the new tread to the carcass. Subsequently, a flexible curing membrane (or envelope) is disposed at least partially around the tire to create a sealed fluid chamber between the curing membrane and the tire. The combination of a retreaded tire with an installed curing membrane is referred to herein as a tire membrane assem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C1/00B60C11/00
CPCB60C11/02B29D30/56B29D2030/544
Inventor M·L·伊科诺莫夫D·C·W·伦格A·T·谢布利J·梅勒姆
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN