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Motorcycle tyre and making method thereof

A manufacturing method and motorcycle technology, applied to tire components, reinforcement layers of pneumatic tires, tires, etc., can solve problems such as transitional performance degradation

Active Publication Date: 2014-03-26
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to form the tip portion J with high precision by the STW method, and as in the case of the integral extrusion molding described above, there is also a problem that the transition performance from straight running to turning is degraded.

Method used

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  • Motorcycle tyre and making method thereof
  • Motorcycle tyre and making method thereof
  • Motorcycle tyre and making method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0073] (A) According to the specifications in Table 2, a prototype with figure 1 The tire size shown in the internal structure is a motorcycle tire of 180 / 55R17, and the handling stability, rolling resistance performance and transition characteristics of the test tire are tested. Figure 8 (A)~ Figure 8 (D) shows the tread rubber structure of each tire, and Table 1 shows the tangent loss values ​​tanδ, complex elastic modulus E*, silica compound ratio.

[0074] Among them, for each tread rubber, only the central top (surrounded by a thick line) is formed from extruded rubber integrally extruded by a rubber extruder, and the high temperature supplied from a gear pump type intermittent extruder is utilized. STW (sometimes referred to as high-temperature STW) of rubber strips in a low-temperature state to form the shoulder top by using STW (sometimes referred to as low-temperature STW) of rubber strips in a low-temperature state supplied from a continuous extruder via a reser...

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Abstract

The invention provides a motorcycle tyre and a making method thereof; the rolling resistance performance, operation stability and transition performance of steering from straight to a corner can be simultaneously improved; tread rubber comprises the following structures: a bottom layer having tread rubber side portions on two ends and a connecting rubber portion connecting the two tread rubber side portions; and a top layer configured on an outer side in a radial direction. The top layer comprises a central top on a tyre equatorial face side and shoulder tops configured on two outer sides of the central top; the central top comprises a central top main body portion forming a tyre surface and a central top base portion on a radial inner side of the central top main body portion; a cross section of the central top is a similar trapezoid with a base angle [theta] under 45 degrees, and rubber is employed to form a ring through extrusion molding so as to form the central top. A rubber strip is winded in a spiral shape so as to form the bottom layer and the shoulder tops.

Description

technical field [0001] The present invention relates to a tire for motorcycles capable of ensuring excellent rolling resistance performance and improving steering stability, and a method for manufacturing the same. Background technique [0002] Even for motorcycle tires, from the viewpoint of low fuel consumption, it is preferable that Figure 9 (A) As schematically shown, the main body portion a of the tread rubber A is divided into a radially outer rubber layer a1 and an inner rubber layer a2, and a low heat-generating rubber with a small loss tangent value δ is used for the inner rubber layer Rubber layer a2. Among them, the tread side rubber part b which can improve the adhesiveness with the side rubber is arranged on both sides of the above-mentioned main body part a, and the tread bottom part which can improve the adhesiveness with the tread reinforcing cord layer etc. The glue part c is disposed under the main part a. [0003] However, for a rubber with a small loss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/18B60C9/02B29D30/08
CPCY02T10/86
Inventor 大谷匡史
Owner SUMITOMO RUBBER IND LTD
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