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Pneumatic tire and tire cure metal mold

A technology for tire vulcanization molds and pneumatic tires, which is applied to the reinforcement layer of pneumatic tires, tire tread/tread pattern, off-road vehicle tires, etc., and can solve problems such as tire side design and unrevealed solutions

Inactive Publication Date: 2019-05-17
TOYO TIRE & RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this is not a technology related to the protrusions in the buttress region that can generate traction on bad roads, icy and snowy roads, but a technology related to the protrusions provided around the tire maximum width position in order to improve the cooling efficiency of the sidewall portion. The above-mentioned problems concerning the design of the sidewall of the tire do not suggest its solution

Method used

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  • Pneumatic tire and tire cure metal mold
  • Pneumatic tire and tire cure metal mold
  • Pneumatic tire and tire cure metal mold

Examples

Experimental program
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Embodiment Construction

[0037] Embodiments of the present invention will be described below with reference to the drawings. figure 1 It is a tire meridian half sectional view schematically showing an example of the pneumatic tire of the present invention. figure 2 It is a developed view showing the outer surface of the pneumatic tire. exist figure 2 , represents the range X including the tire equator TE to the buttress region 2B.

[0038] In the present embodiment, the pneumatic tire T is shown as an example of an off-road pneumatic radial tire intended to travel on a bad road surface including muddy ground and rocky ground. The pneumatic tire T includes: a pair of bead portions 1; a pair of sidewall portions 2 extending outward in the tire radial direction from the bead portions 1; The radially outer ends are connected. Embedded in the bead portion 1 is an annular bead core 1a formed of a bundle of rubber-coated steel wires or the like, and a bead filler 1b disposed on The outer side in the t...

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Abstract

Provided are a pneumatic tire and a tire vulcanization mold for vulcanization molding of the pneumatic tire, the pneumatic tire being capable of suppressing the molding defects of protrusions in a buttress region and reducing the design deterioration of the side surfaces of the tire caused by the protrusions. The pneumatic tire has a pair of bead portions, a pair of side wall portions which extendfrom the bead portions to an outer side in a tire diametrical direction, a tread portion which is connected to an outer side end of each of the pair of side wall portions in the tire diametrical direction, a plurality of projections (12) which are provided in a buttress region of the side wall portions along a tire circumferential direction; and a plurality of protrusions (20) which protrude outof surfaces (12s) of the projections (12). In each of a plurality of sides forming a periphery of the surfaces (12s) of the projections (12), in the case that rectangular areas (12a-12q) having a distance from the side being (12A-12Q) in a range of 2.5 mm or less are defined on the surfaces (12s) of the projections (12), at least one protrusion (20) is provided in each of the rectangular areas (12a-12q).

Description

technical field [0001] The present invention relates to a pneumatic tire provided with a plurality of protrusions in a buttress region of a sidewall portion, and a tire vulcanization mold for vulcanizing the pneumatic tire. Background technique [0002] There is known a pneumatic tire in which a plurality of protrusions are provided in the buttress region of the side wall along the tire circumferential direction. This tire is disclosed in, for example, Patent Document 1 filed by the present applicant. When traveling on muddy ground, sandy ground, or other bad roads, or on icy and snowy roads, the shearing resistance of the protrusions can be used to generate traction, thereby improving the running performance. [0003] In addition, the protrusions provided in the buttress region affect not only the above-mentioned functions of the tire but also the design of the tire. For example, the design of the tire side surface can be improved by increasing the three-dimensional effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C35/02B29C33/42B29C33/10B29D30/06B60C13/02
CPCB60C11/01B60C2200/14B60C13/02B60C13/001B60C2009/0215B60C15/024B60C9/02B60C15/0628
Inventor 坂本早智雄
Owner TOYO TIRE & RUBBER CO LTD