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Off-the-road tire and iss production method

一种工程车轮胎、制造方法的技术，应用在工程车轮胎领域，能够解决区块碎裂、胎面早期磨耗等问题，达到兼顾耐发热性、兼顾耐磨耗性的效果

Inactive Publication Date: 2008-06-11
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in an off-the-road vehicle tire equipped with small grooves in the circumferential direction for heat dissipation, when the block row is formed in the central part of the tread as described above, since each block tends to move back and forth or left and right when the tire is turned under a load, it cannot respond to high The requirement of load capacity and high traction capacity leads to wear resistance related problems such as premature wear of the tread or other failures such as block chipping

Method used

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  • Off-the-road tire and iss production method
  • Off-the-road tire and iss production method
  • Off-the-road tire and iss production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] The OTR tires of the present invention were produced, and performance evaluations related to wear resistance, crack progression resistance, heat release performance, and traction performance were performed as described below.

[0090] Example tire 1 has figure 1 With the tread pattern shown, Example tire 2 has the following Figure 4 With the tread pattern shown, the previous example tire 1 has Figure 8 The tread pattern shown, then the previous example tire 2 has the following Figure 9 Tread pattern shown, and embodiment tire 3 has the groove structure as shown in Figure 5, embodiment tire 4 has the groove structure as shown in Figure 5 and Figure 6, then embodiment tire 5 has the groove structure as shown in Figure 5, Figure 6 6 and the trench structure shown in Figure 7.

[0091] Furthermore, each of the test tires had the specifications shown in Table 1, and the region from the bead portion to the sidewall portion had the same structure as that of an engineerin...

Embodiment 2

[0105] Find the cost of the mold when changing the type of mold and the boundary position of the mold parts, the exchange time of the separated mold parts, and measure the occurrence of the boundary position of the mold parts of the tire when the manufactured tire is rotated at a speed of 10km / h for 5000km The partial wear of the land part caused by the overflow rubber, the results are shown in Table 3.

[0106] Also, the tire size and usage conditions at this time are the same as those in Example 1.

[0107]

[0108] According to Table 3, no matter in any embodiment, the disadvantage in terms of mold cost can be achieved by separating the interchangeability of mold parts, and smooth removal of vulcanized tires can be achieved, and in particular , Embodiments 1, 2 and 6 can effectively avoid partial wear caused by the presence of spilled rubber.

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Abstract

The invention is to improve wear resistance and resistance to crack growth of an off-the-road tire having a gauge of a tread rubber of 60-200 mm, in which a plurality of widthwise grooves extending substantially in a widthwise direction of the tire are arranged in each side region of the tread, and a pair of circumferential fine grooves continuously extending straight-forward or zigzag in a circumferential direction of the tire are arranged in a central zone of the tread, and a plurality of widthwise fine grooves extending substantially in the widthwise direction of the tire and contacting their grooves walls with each other in a ground contact area are arranged between these circumferential fine grooves.

Description

technical field [0001] The present invention relates to an engineering vehicle tire, which can take into account the wear resistance and crack progress resistance of the tread at a high degree under severe load conditions and traction conditions. Background technique [0002] Off-the-road tires used for construction vehicles are also heavy-duty tires. However, compared with truck and bus tires, these conventional tread patterns generally require higher load capacity and traction capacity. Ribs are formed in the center of the tread to exhibit wear resistance even under high loads, and lugs are formed on both sides of the tread to exhibit high traction performance. [0003] However, if the width of the forming region of the linear or zigzag ribs sandwiched between the imaginary lines connecting the front ends of the convex grooves in the tread center portion is larger than necessary, the traction performance when climbing hills, etc. will be insufficient. And because there is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/11B60C11/00B29C35/02B60C11/13
CPCB60C11/13B60C11/11Y10S152/902B60C11/00Y10S152/03B60C2200/065
Inventor 小野昭
Owner BRIDGESTONE CORP
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