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Prevulcanized annular crown of extra-large tire and its preparation method and application

A pre-vulcanization, tire crown technology, applied in the direction of tire tread/tread pattern, application, tire parts, etc., to avoid poor heat dissipation, avoid adverse effects, and improve heat dissipation capacity

Active Publication Date: 2021-08-06
BEIJING DUBELI TYRE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] In order to solve the defects of the existing technical process of retreading extra-large tires such as the low proportion of old carcass reuse and the poor performance of retreaded tires, the present invention provides a pre-vulcanized annular tire crown for extra-large tires, which can solve the current technological process of retreading extra-large tires. The above-mentioned deficiencies in

Method used

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  • Prevulcanized annular crown of extra-large tire and its preparation method and application
  • Prevulcanized annular crown of extra-large tire and its preparation method and application
  • Prevulcanized annular crown of extra-large tire and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] This embodiment is a pre-vulcanized annular crown of 59 / 80R63 extra-jumbo tire, which is characterized in that the middle section inside the section of the annular crown is a multi-section arc, and the inner side of the shoulder extension at both ends is an arc tangent to the middle section.

[0071] 1. After the tire is used, its size and structure are quite different from the new tire. Therefore, before retreading the tire, it is necessary to inspect the main body size and crown structure size of the corresponding new tire, and then determine the structural dimensions of the pre-vulcanized annular crown.

[0072] The new tire parameters are as follows:

[0073] The tire section width is 1490mm; the outer diameter is 4025mm; the driving surface width is 1300mm; the driving surface arc radius is 3900mm; the pattern depth is 88mm.

[0074] The basic size of the annular crown is the same as that of a new tire, and the other main characteristic dimensions of the annular cr...

Embodiment 2

[0087] This embodiment is a pre-vulcanized annular crown of 59 / 80R63 extra-jumbo tire, which is characterized in that the middle section inside the section of the annular crown section is a multi-section arc, and the inner side of the shoulder extension at both ends is a tangential arc transition with the middle section. straight line.

[0088] The same parts of the new tire parameters and the main characteristic dimensions of the annular crown are referred to in Example 1. The difference is that the inner side of the tire shoulder extension 7 is a straight line tangent to the arc, and the angle between the straight line and the center line of the section is 35°. °, the radius of the transition arc between the straight line and the inner surface of the crown is 100mm.

[0089] According to the above size data, a pre-vulcanized annular tire crown for extra-large tires is realized as follows:

[0090] like Image 6 As shown, the pre-vulcanized annular rubber crown includes the...

Embodiment 3

[0096] The difference between this embodiment and Embodiment 1 is that blind holes 10 for installing sensors are distributed on the surface of the tread rubber, and the bottom ends of the blind holes 10 are located between the base rubber and the belt layer.

[0097] The tread adds a preset blind hole for sensor installation. When it is necessary to install a tread sensor to monitor the use of extra-large retreaded tires, it can be installed directly without drilling holes on the tread surface, which can improve the position accuracy of the later sensor installation. and work efficiency. The blind hole of the tread corresponds to the raised cylindrical structure on the vulcanization mold. The cylindrical structure is in the pattern block during vulcanization, which increases the heat transfer point inside the tread compound and can improve the heat in the tread during vulcanization. The distribution state is beneficial to the vulcanization uniformity of the pattern block rubbe...

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Abstract

The present invention relates to a pre-vulcanized annular tire crown and its preparation method and application. The annular crown includes tire shoulder extensions on both sides of the crown extending along the tire shoulders toward the center of the tire. The shoulder extensions have a The tread extends to the sidewall and is suitable for the pattern block and groove structure of the super jumbo tire, and the cross-sectional outer contour of the shoulder and the shoulder extension has a concave shape. The invention can completely remove the pattern grooves on the original tire shoulders when grinding the old carcass, and can give full play to the crown structure and functional advantages of the extra-large tire after retreading, so that the retreaded tire has better heat dissipation capacity, and at the same time reduces Shoulder delamination and peeling phenomenon; reduce the vulcanization time of the whole tire under high temperature and high pressure, avoid adverse effects on the carcass structure and rubber, suitable for the manufacture of new tires and retreaded tires, and can fully improve the wear resistance of the tread part , Puncture-resistant performance; the bonding strength is also improved through the larger shoulder extension, which is conducive to the stability of the bonding structure.

Description

technical field [0001] The invention relates to the technical field of pre-cured crowns, in particular to a pre-cured annular crown of an extra-jumbo tire and its application. Background technique [0002] The so-called extra-jumbo tire refers to the division of tire size in the tire appearance quality standard "HG / T2177-2011" of the chemical industry standard of the People's Republic of China. Pneumatic tires with a nominal rim diameter of 33 inches and above and a nominal section width of 24 inches and above are: Jumbo tires. At the same time, according to the generally recognized concept put forward by the China Rubber Association: the nominal outer diameter of the rim of the tire specification is 33 inches or more, and the outer diameter of the tire design is more than 2000mm, and the load capacity of a single tire (★★ class, 10km / h) The engineering tires weighing more than 20,000kg are giant tires. At present, tires that meet the requirements of this specification are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/01B60C9/18B29D30/58
CPCB60C11/01B60C9/18B29D30/58B60C2011/013B29D30/0605B29D30/54B60C11/02B29D30/56B60C9/28
Inventor 朱小君姚天琳朱健朱世兴
Owner BEIJING DUBELI TYRE CO LTD
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