Inflated tyre and vulcanized metal die thereof

A technology of pneumatic tires and tires, which is applied to tire parts, tire treads/tread patterns, tires, etc., and can solve problems such as knife bending, knife falling off, and high resistance

Inactive Publication Date: 2003-02-19
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such pattern (sipping) a as shown in FIG. 6(B), due to the aforementioned displacement c, the resistance when the tire is taken out from the mold becomes high, and at this time, due to the blade d, There is a large bending stress and bending moment acting along its thickness direction, so it will cause damage such as falling off of the knife and bending of the knife

Method used

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  • Inflated tyre and vulcanized metal die thereof
  • Inflated tyre and vulcanized metal die thereof
  • Inflated tyre and vulcanized metal die thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] figure 1 It is a developed view of the tread pattern when the pneumatic tire of the present invention is formed as a studless tire for passenger vehicles.

[0032] exist figure 1 In the pneumatic tire 1, a block 3 provided on a tire tread portion 2 is formed with a pattern (sipping) 4 extending from one side edge of the block 3 to the other side edge.

[0033] In this example, by providing the tread portion 2 with longitudinal main grooves 5 extending in the circumferential direction of the tire and transverse main grooves 6 intersecting therewith, the tread portion 2 is divided into, for example, two ribs on the tire equator side. 7, and on both outer sides thereof, for example, four block rows 3R in which the blocks 3 are arranged at intervals in the circumferential direction. Meanwhile, on the aforementioned squares 3 (in this example, on both the squares 3 and the ribs 7 ), sippings 4 are provided at intervals in the tire circumferential direction.

[0034] Secon...

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PUM

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Abstract

A pneumatic tire comprises a tread portion comprising tread elements each provided with a sipe (4), the sipe (4) having an open top end and a bottom, and in a range from the open top to a certain depth, a configuration of the sipe in a plane parallel with the tread face comprising a zigzag part oscillating in the longitudinal direction of the sipe in the course from the open top to said certain depth.

Description

technical field [0001] The present invention relates to a pneumatic tire and a vulcanized metal mold thereof which are very suitable for winter tires. By forming a surfing surface with a predetermined three-dimensional curved surface having three-dimensional concavities and convexities, excellent performance on ice can be exhibited and the surfing can be suppressed. ) damage such as falling off and bending of the blade used for forming. Background technique [0002] In winter tires such as snow tires and studless tires, in the prior art, linear or zigzag patterns (sipping) are formed on the blocks formed on the tire tread to improve the flexibility of the block surfaces. The adhesive friction is increased, and the driving performance on ice is ensured by the scratching force (edge ​​effect) on the road surface generated by the edge of the pattern (sipping). [0003] And generally speaking, the driving performance on ice increases with the increase of the length and the numb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/02B29C35/02B29L30/00B60C11/11B60C11/12
CPCY10S152/03B60C2011/1213B29D2030/0613B60C11/12B60C11/1218
Inventor 岩村和光
Owner SUMITOMO RUBBER IND LTD
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