Pneumatic tire, tire vulcanization mold, and method for producing pneumatic tire using tire vulcanization mold

A tire vulcanization mold, a technology for pneumatic tires, applied in the direction of tire tread/tread pattern, tire parts, tires, etc., to achieve the effect of suppressing the reduction of wet braking performance, excellent noise performance, and improving noise performance

Pending Publication Date: 2020-08-25
SUMITOMO RUBBER IND LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The pneumatic tire of Patent Document 1 mentioned above has excellent wet braking performance, but there is room for improvement in terms of noise performance.

Method used

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  • Pneumatic tire, tire vulcanization mold, and method for producing pneumatic tire using tire vulcanization mold
  • Pneumatic tire, tire vulcanization mold, and method for producing pneumatic tire using tire vulcanization mold
  • Pneumatic tire, tire vulcanization mold, and method for producing pneumatic tire using tire vulcanization mold

Examples

Experimental program
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Effect test

Embodiment

[0088] use Figure 5 The tire curing mold shown is manufactured with figure 1 Pneumatic tires with the basic pattern, and tested the wet road braking performance and noise performance of each pneumatic tire. Common specifications and test methods for each tire are as follows.

[0089] Tread width TW: 165mm

[0090] Width of the first groove (w2 / Ws): 9(%)

[0091] Width of the second groove (w2 / Ws): 15(%)

[0092] The width (w3 / Ws) of the dimple: 9(%)

[0093] Width w1 of the first sipe, the second sipe, and the fourth sipe: 0.8mm

[0094] Width w1 of the third sipe: 1.2mm

[0095] Tire size: 215 / 65R16

[0096] Rims: 16×6J

[0097] Internal pressure (front wheel / rear wheel): 240 / 290kPa

[0098]

[0099] The following vehicles equipped with test tires on all wheels were driven on a test course on a wet asphalt road with a water depth of 5 mm, and the braking performance when driving straight and turning at this time was evaluated according to the sense of the test dri...

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Abstract

The present invention relates to a pneumatic tire capable of improving noise performance without compromising wet brake performance. A pneumatic tire (1) has a tread part (2). A land part (4) of the tread part (2) is provided with a plurality of sipes (8) having a width of less than 1.5 mm on the ground contact surface (4a), and a plurality of grooves (9) having a width of 1.5 mm or more on the ground contact surface (4a). The length (La) in the tire axial direction of the grooves (9) provided in the land part (4) is 15% or less of the maximum width (Ws) in the tire axial direction of the ground contact surface (4a) of the land part (4). At least one of the sipes (8) communicates with the grooves (9).

Description

technical field [0001] The present invention relates to a pneumatic tire, a tire vulcanization mold, and a method for manufacturing a pneumatic tire using the tire vulcanization mold. Background technique [0002] Patent Document 1 below describes a pneumatic tire provided with a shoulder land portion divided by a shoulder main groove and a tread edge. The shoulder land portion is provided with a shoulder lateral groove extending from the tread edge toward the tire equator, and a shoulder lateral sipe extending from an inner end of the shoulder lateral groove to the shoulder main groove. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2013-139194 [0004] The pneumatic tire of Patent Document 1 mentioned above has excellent wet braking performance, but there is room for improvement in terms of noise performance. Contents of the invention [0005] The present invention has been made in view of the above circumstances, and its main object is to provide a pneumati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D30/06B29D30/08B60C11/03
CPCB29D30/0606B29D30/08B60C11/0327B29D2030/0616B60C2011/0337B60C11/1236B60C11/1392B60C11/1218B60C11/032B60C2011/0381B60C2011/0358B60C11/0306B60C2011/036B60C2011/013B29D30/06B29D2030/0613B29D2030/061B29D30/0629B60C11/1204B60C11/1272B60C2011/0365B60C2011/1209B60C11/1281B60C2011/0348
Inventor 小林达矢
Owner SUMITOMO RUBBER IND LTD
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