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Method of manufacturing motorcycle tires for rough terrain

A technology for motorcycle tires and manufacturing methods, which is applied to motorcycle tires, motorcycles, off-road vehicle tires, etc., can solve problems such as damaged rigidity, and achieve the effects of heavy load, excellent rigidity and impact absorption

Active Publication Date: 2021-12-07
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, if the rigidity of the tread portion is relaxed in order to improve the impact absorption, the rigidity of the sidewall portion is also relaxed, so the feeling of rigidity at the time of driving tends to be impaired.

Method used

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  • Method of manufacturing motorcycle tires for rough terrain
  • Method of manufacturing motorcycle tires for rough terrain
  • Method of manufacturing motorcycle tires for rough terrain

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0092] Use the manufacturing method to try to make a figure 1 The basic configuration of the size 120 / 80-19 motocross rear tires. In addition, as Comparative Example 1, an attempt was made to manufacture a test tire using a manufacturing method in which the clamping width W2 was 137% of the rim width of a regular rim. The feeling of rigidity at the time of driving and the impact absorbability of each test tire were tested. Common specifications or test methods for each test tire are as follows.

[0093] Vehicle used: Displacement 450cc Motocross racing vehicle

[0094] Rim size: 2.15×19

[0095] Internal pressure: 80kPa

[0096]

[0097]The sense of rigidity at the time of driving and the shock absorption when the test vehicle was driven on a motocross course were evaluated by the senses of a test rider. As a result, comparative example 1 was rated as 100, and the larger the numerical value, the better the rigidity or impact absorption during driving. The test results ...

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Abstract

The present invention provides a method of manufacturing a motorcycle tire for riding on rough terrain that can provide both rigidity and shock absorption during driving. The method of the present invention is used to manufacture motorcycle tires for driving on rough terrain, and includes a process of forming a blank tire having a tread portion (2), a pair of sidewall portions (3) and a pair of tire tires, and a vulcanization process. In the ring portion (4), the vulcanization step uses a mold to vulcanize the green tire. In the mold (10), the clamping width (W2) is 100% to 110% of the rim width (W1) of the normal rim of the mounted motorcycle tire, and the clamping width (W2) is to form a pair of bead parts. (4) The tire axial distance between a pair of bead forming surfaces on the outer surface.

Description

technical field [0001] The present invention relates to a method of manufacturing motorcycle tires for driving on rough ground. Background technique [0002] Conventionally, various motorcycle tires for rough terrain have been proposed (see, for example, Patent Document 1 below). A vehicle mounted with such tires sometimes jumps greatly from the road surface when running on a rough terrain or during a motocross race. Therefore, it is desired that the tire has both rigidity when driving and shock absorption when landing after jumping. [0003] However, if the rigidity of the tread portion is relaxed in order to improve the impact absorbability, the rigidity of the sidewall portion is also relaxed, so the feeling of rigidity at the time of driving tends to be impaired. [0004] [Prior art literature] [0005] [Patent Document] [0006] [Patent Document 1] Japanese Patent No. 5174142 Contents of the invention [0007] [Problem to be Solved by the Invention] [0008] The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C35/02B29C33/00B60C9/08B29L30/00
CPCB29D30/0606B29D2030/0607B60C9/08B29D30/16B60C11/032B60C11/11B60C11/1376B60C2200/10B60C2200/14B60C11/1392
Inventor 疋田真浩青木镇也
Owner SUMITOMO RUBBER IND LTD