Run-flat tire forming device

A forming equipment and a technology for run-flat application, applied in the field of forming equipment, can solve the problems of deterioration of productivity, easy occurrence of wrinkles, poor vulcanization, etc., and achieve the effects of suppressing air encapsulation, improving productivity, and preventing poor vulcanization

Inactive Publication Date: 2012-11-14
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Therefore, since the outer surface of the rubber reinforcement layer g around which the side rubber s is wound has large irregularities, wrinkles and air are easily generated when the side rubber s is wound, and there is a problem that productivity deteriorates.
In addition, there is also a problem that vulcanization defects called defects occur due to such air entrainment.

Method used

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Embodiment Construction

[0037] Next, an embodiment of the present invention will be described with reference to the drawings.

[0038] The run-flat tire molding facility (hereinafter sometimes simply referred to as "forming facility") 12 of this embodiment is used to manufacture run-flat tires 1 for passenger cars, such as Figure 11 As shown, the run flat tire 1 has: a carcass 6 extending from the tread portion 2 through the sidewall portion 3 to the bead core 5 of the bead portion 4; Arranged outside the tire radial direction of the carcass 6 and inside the tread portion 2; a rubber reinforcing layer 9 arranged inside the carcass 6 of each sidewall portion 3; and an inner liner rubber 10, the The inner liner rubber 10 is arranged inside the carcass 6 to the rubber reinforcement layer 9 .

[0039] The carcass 6 is composed of one or more, in the present embodiment, one carcass ply 6A in which carcass cords are arranged at an angle of 70 to 90 degrees with respect to the tire equator C, for example....

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Abstract

Provided is a run-flat tire (1) forming device (12) for expanding and deforming a tire body base body (1M) with a pair of bead cores (5), a tire body cord fabric layer (6A) and a rubber reinforcing layer (9). The forming device (12) comprises a pair of bead locking units (32) for clamping the tire body cord fabric layer (6A) through expanding to keep the bead cores (5) from the inner side and moving to an axial direction; a pair of tire side plates (38) capable of extending and shrinking diameters, located in an axial inner side of the bead locking units (32) and capable of supporting a tire side part (3) of the tire body base body (1M) from the inner side. The peripheral surfaces of the tire side plates (38) form a peripheral groove (45) matching with a section shape of the rubber reinforcing layer (9).

Description

technical field [0001] The present invention relates to a molding apparatus for run-flat tires capable of improving productivity. Background technique [0002] Conventionally, various run-flat tires have been proposed, which can run for a long distance even when the air in the tire is released due to a blowout or the like (hereinafter, this type of running is simply referred to as "run-flat"). As a typical run-flat tire, a side-reinforced type structure in which a substantially crescent-shaped rubber reinforcement layer is provided on a sidewall portion is known. [0003] As a process of manufacturing such a run-flat tire, first, as Figure 12 As shown in (a), on a cylindrical forming drum d, a sheet-shaped inner liner rubber i, a pair of rubber reinforcement layers g, and a sheet-shaped carcass ply c are sequentially wound, and then the bead core b and tire core b are inserted. Circle the apex e to form a cylindrical carcass matrix a. [0004] Next, if Figure 12 As shown...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D30/08
Inventor 鬼松博幸
Owner SUMITOMO RUBBER IND LTD
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