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Tyre mold

A technology for tires and molds, which is applied in the field of molds with multiple combined molds, and can solve problems such as damaging the quality of tires 14 and damaging the quietness of tires 14

Inactive Publication Date: 2014-02-26
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This flash 12 may impair the quietness of the tire 14
In addition, the flash 12 may become the starting point of the crack
This flash 12 impairs the quality of the tire 14

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] ready to have image 3 In the mold of the shown split mold, the step width W of the split surface of the mold is 10 mm. The angle of the surface forming the step with respect to the circumferential direction is 0°.

Embodiment 2～5

[0072] Dies having a width W shown in Table 1 below were prepared.

Embodiment 6

[0074] ready to have Figure 10 The mold of the split mold is shown. The step width W of the split surface of this mold was 10 mm. The angle θ of the surface forming the step with respect to the circumferential direction was 3°.

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Abstract

The present invention provides a tyre mold, capable of obtaining a high-quality tyre. A combined die (18) of the mold is provided with an upper side main mountain part (26) and a lower side main mountain part (28) on its die cavity surface (24). The combined die is provided with a left separating surface (34) and a right separating surface (36). The left separating surface has a first surface (38), a second surface (40), a third surface (42), a fourth surface (44) and a fifth surface (46). The second surface is provided with a step between the first and third surfaces. The fourth surface is provided with a step between the third surface and the fifth surfaces. The right separating surface (36) has a sixth surface (48), a seventh surface (50), an eighth surface (52), a ninth surface (54) and a tenth surface (56). The seventh surface is provided with a step between the sixth surface and the eighth surface. The steps are arranged on the upper side main mountain part or the lower side main mountain part.

Description

technical field [0001] The present invention relates to a mold for tires. Specifically, the present invention relates to a mold having a plurality of split molds. Background technique [0002] Molds are generally used in the vulcanization process of tires. In the vulcanization process, the green tire obtained by preforming is placed in a mold. The green tire is pressurized and heated in the cavity surrounded by the mold and the air bag. The rubber composition of the raw tire flows in the cavity by applying pressure and heat. By heating, the rubber undergoes a cross-linking reaction to obtain a tire. [0003] Molds are roughly divided into sheet molds and two-half molds. In recent years, sheet molds have been mainly used from the viewpoint of increasing the degree of freedom of the tread pattern. The sheet mold has a plurality of tread combination molds. Figure 11 It is a front view showing the conventional split mold 2 . The split mold 2 has two main mountain portions...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C33/00B29D30/08
Inventor 面川寿彦
Owner SUMITOMO RUBBER IND LTD