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Pneumatic tire and manufacturing method of pneumatic tire

A technology of pneumatic tires and tires, which is applied to tire parts, tires, tire edges, etc., can solve problems such as tire uniformity deterioration, and achieve the effects of maintaining uniformity, suppressing stress concentration, and uniform weight balance

Inactive Publication Date: 2015-10-14
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in such a pneumatic tire 1, since the extended bead wire 10f intersects the overlappingly wound bead wire 10g, there is a problem that the uniformity of the tire deteriorates.

Method used

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  • Pneumatic tire and manufacturing method of pneumatic tire
  • Pneumatic tire and manufacturing method of pneumatic tire
  • Pneumatic tire and manufacturing method of pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0048] In order to confirm the effect of the present invention, by using Figure 4 A tire having a bead core according to the invention with the core shown and Figure 5 The conventional tires having bead cores shown in (a) and (b) were vulcanized to produce pneumatic tires, and the hydraulic pressure and uniformity tests were carried out. The main common specifications are as follows.

[0049] Carcass ply number: 1 piece

[0050] Carcass Cord Material: Polyester

[0051] Carcass cord angle: 88° (to tire equator)

[0052] Number of belt plies: 2 pieces

[0053] Belt Cord Material: Steel

[0054] Belt cord angle: +28°, -28° (to tire equator)

[0055] Rubber hardness of bead wire: 80 degrees

[0056] Wire Material of Bead Wire: Steel

[0057] Tire size: 195 / 65R15

[0058]

[0059] Each test tire rim was assembled to a 6.0JJ×15 rim, and water was filled into the tire cavity from the valve, and the breaking water pressure when the bead core was broken was measured five t...

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Abstract

The present invention discloses a pneumatic tire and a manufacturing method thereof. Durability of tire bead part is improved through improving an overlapping coiling method of the tire bead metal wire. The pneumatic tire (1) comprises the following components: a tire body (6) which comprises tire body curtain cloth (6A) that extends according to a mode of annularly bestriding a pair of tire bead parts (4,4); and a tire bead core (5) which comprises an inner core (11) and an outer core (12) that are configured at the inside part and the outside part of a tire shaft at an inner part (6e) of a radial inner side of the tire of the tire body curtain cloth (6A). The inner core (11) is obtained through spirally overlapping and coiling a tire bead metal wire (10) from a radial outer side of the tire. The outer core (12) is formed through spirally overlapping and coiling the tire bead metal wire (10) from radial inner side of the tire to radial outer side at axial outer side of the tire of the tire body (6). The tire bead core (5) comprises a tire bead metal wire (10) which is continuous between the inner core (11) and the outer core (12).

Description

technical field [0001] The present invention relates to a method of manufacturing a pneumatic tire in which the durability of a bead portion is improved by improving a method of overlapping and winding a bead wire. Background technique [0002] In recent years, a method of manufacturing a pneumatic tire 1 (core method) has been proposed in the following Patent Document 1. The method is as follows: Figure 4 As shown, a core 13 having an outer surface 14 similar in shape to the inner surface of the tire at the time of internal pressure filling is used. In this manufacturing method, the inner liner 9, the carcass cord 6A, the bead wire 10 constituting the bead core 5, the belt layer 7, the tread rubber 2G and the The side rubber 3G and the like shape the green tire 1a, and usually the green tire 1a is vulcanized together with the core 13. In this method, since the tension acting on the carcass, belt, etc. during vulcanization is suppressed to a minimum, there is an advantage ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D30/18B60C15/02B60C15/04
Inventor 中田典克
Owner SUMITOMO RUBBER IND LTD
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