KR101911889B1 - Bladder for tire vulcanizing and tire vulcanizing apparatus comprising the same and method of manufacturing the tire using the same - Google Patents

Abstract

The present invention relates to a bladder for vulcanizing a tire, a tire vulcanizing apparatus having the same, and a tire manufacturing method using the same. The present invention relates to a bladder for tire vulcanizing which forms the green tire in contact with an inner circumferential surface of a green tire during vulcanization, the bladder comprising an expanding portion corresponding to the tread of the green tire at the time of molding, And a shoulder portion, the inflatable portion having a predetermined width in a first direction, a flat surface disposed at the center of the inflated portion in the first direction, and a plurality of embossed portions extending on both sides of the flat surface, A first groove extending along one surface of the M-shaped groove at one end of the flat surface, and a second groove disposed between the first groove and the M-groove, .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire vulcanizing bladder, a tire vulcanizing apparatus having the same, and a tire manufacturing method using the vulcanizing tire vulcanizing apparatus,

Embodiments of the present invention relate to a tire vulcanizing bladder, a tire vulcanizing apparatus having the same, and a tire manufacturing method using the same.

The vehicles that the users are traveling with are made up of many parts, among which the tires have a great effect on the driving of the vehicle, and can be said to be one of the key components for securing the safety of the user.

Tires are produced through a cutting process, a molding process, a vulcanizing process and an inspection process. The cutting step is a step of cutting the rolled material to a predetermined width and angle, and the forming step is a step of assembling the cut semi-finished product. Then, in order to improve the physical properties of the tire, a vulcanization process of applying heat and pressure to the formed tire proceeds. The inspection process is a process for inspecting the performance of the manufactured tire.

The vulcanization process is carried out by applying heat and pressure to the inside and outside of the tire by putting the tire into the vulcanizer. Steam is used as the heat source, and inert gas is used as the pressure source.

In the vulcanizing process, the bladder for vulcanization of the tire applies heat and pressure inside the green tire, and the mold exerts heat and pressure on the green tire. Since the vulcanization process uses the bladder for tire vulcanization repeatedly, its performance may be deteriorated by fatigue. Therefore, research on a method for improving the performance and lifetime of a vulcanization bladder for a tire vulcanization continues.

The above-described background technology is technical information that the inventor holds for the derivation of the present invention or acquired in the process of deriving the present invention, and can not necessarily be a known technology disclosed to the general public prior to the filing of the present invention.

BRIEF SUMMARY OF THE INVENTION Embodiments of the present invention provide a bladder for tire vulcanization with improved process life, a tire vulcanizer having the same, and a tire manufacturing method using the same.

According to one aspect of the present invention, there is provided a bladder for tire vulcanizing which forms the green tire in contact with an inner circumferential surface of a green tire during vulcanization, the bladder comprising an expanding portion corresponding to a tread of the green tire at the time of molding, Wherein the expansion portion has a predetermined width in the first direction and is disposed at the center of the expansion portion in the first direction and a plurality of embossed portions extending on both sides of the flat surface, A first groove disposed on one side of the first surface of the flat surface and a first groove extending along one side of the first surface, and a second groove disposed between the first groove and the second groove, There is provided a bladder for vulcanizing a tire having a groove.

In addition, the width of the flat surface may have a length of any one of 40 mm to 110 mm.

In addition, the width of the flat surface may have a length of any one of 27% to 34% of the distance between the flat surface and the central axis of the tire vulcanizing bladder.

The air between the inner circumferential surface of the green tire and the outer surface of the inflatable portion may be discharged through the first groove and the second groove when the bladder for vulcanizing the tire expands.

Further, when the tire vulcanization bladder is contracted, the flat surface can be folded at least twice.

According to another aspect of the present invention, there is provided a vehicle comprising: a central shaft which is moved up and down; a post which is installed above the center shaft and has an internal space, into which a green tire is inserted; A hub which is fixed to the other end of the bladder for tire vulcanization and which is provided at an upper end of the central shaft and a hub fixed to the inner surface of the post, And a supporter for supporting at least the green tire when the central shaft descends, wherein the bladder for vulcanizing the tire corresponds to the tread of the green tire at the time of molding, A flat surface disposed at a center in the first direction of the bulge portion and having a width, A tire vulcanizer as claimed in any one of the preceding claims, characterized in that the tire comprises a tire vulcanizer (10) having an inflation section with an emptum disposed on the outer side of the tire and a shoulder section extending on both sides of the inflation section, Lt; / RTI >

In addition, the width of the flat surface may have a length of any one of 40 mm to 110 mm.

In addition, the width of the flat surface may be any one of 27% to 34% of the distance between the flat surface and the central axis.

The inflating unit may further include a first groove extending along one side of the first surface of the flat surface, and a second groove disposed between the first groove and the second groove, can do.

The air between the inner circumferential surface of the green tire and the outer surface of the inflatable portion may be discharged through the first groove and the second groove when the bladder for vulcanizing the tire expands.

According to another aspect of the present invention, there is provided a method of manufacturing a tire, comprising the steps of: attaching a green tire to a post provided at an upper end of a center shaft; and expanding a bladder for vulcanizing a tire provided in the inner space of the post to the inner circumferential surface of the green tire while descending the center shaft Discharging the air between the inner circumferential surface of the green tire and the bladder for vulcanizing the tire into a first groove and a second groove formed on one side of the tire vulcanizing bladder, And the bladder for vulcanizing the tire is folded and received into the internal space of the post, the bladder for vulcanizing the tire corresponds to the tread of the green tire at the time of molding, A flat surface having a predetermined width and disposed at the center of the inflated portion in the first direction, And a shoulder portion extending to both sides of the expanding portion, wherein the first groove is formed at an end portion of one side of the flat surface, And the second groove is disposed between the first grooves and is disposed on only one side of the M-shaped groove.

Also, in the step of accommodating the bladder for vulcanizing the tire, the flat surface may be folded at least twice, and the bladder for vulcanizing the tire may be inserted into the inner space of the post.

In addition, the width of the flat surface may have a length of any one of 40 mm to 110 mm.

In addition, the width of the flat surface may be any one of 27% to 34% of the distance between the flat surface and the central axis.

Other aspects, features, and advantages will become apparent from the following drawings, claims, and detailed description of the invention.

The bladder for tire vulcanization, the vulcanizing device for tire, and the method for manufacturing a tire according to an embodiment of the present invention can increase the process life by setting the range of the width of the flat surface according to the outer diameter of the tire vulcanizing bladder. That is, a portion of the tire vulcanization bladder that is folded at the time of shrinkage is formed on the flat surface, so that the life of the bladder for tire vulcanization and the tire vulcanizing apparatus can be improved.

According to another aspect of the present invention, there is provided a bladder for tire vulcanization, a tire vulcanizer, and a method for manufacturing a tire, wherein first grooves and second grooves having different lengths are disposed, and when a bladder for vulcanizing tire is inflated, Air can be easily discharged to the outside.

1 is a cross-sectional view illustrating a pneumatic tire manufactured according to a tire manufacturing method according to an embodiment of the present invention.
2 is a cross-sectional view of a bladder for vulcanizing a tire according to an embodiment of the present invention.
3 is an enlarged view of the expanding portion of Fig.
4 is a cross-sectional view taken along line IV-IV in FIG.
5 is a cross-sectional view taken along line V-V in Fig.
6A to 6C are views showing steps of manufacturing a tire using a tire vulcanizing apparatus according to another embodiment of the present invention.
FIG. 7A is a photograph showing a folded portion of a conventional tire vulcanizing bladder, and FIG. 7B is a photograph showing a folded portion of the tire vulcanizing bladder of FIG. 2. FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention and methods of achieving them will be apparent with reference to the embodiments described in detail below with reference to the drawings. However, the present invention is not limited to the embodiments described below, but may be implemented in various forms.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or corresponding components throughout the drawings, and a duplicate description thereof will be omitted .

In the following embodiments, the terms first, second, and the like are used for the purpose of distinguishing one element from another element, not the limitative meaning.

In the following examples, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

In the following embodiments, the x-axis, the y-axis, and the z-axis are not limited to three axes on the orthogonal coordinate system, and can be interpreted in a broad sense including the three axes. For example, the x-axis, y-axis, and z-axis may be orthogonal to each other, but may refer to different directions that are not orthogonal to each other.

In the following embodiments, terms such as inclusive or possessive are intended to mean that a feature, or element, described in the specification is present, and does not preclude the possibility that one or more other features or elements may be added.

In the following embodiments, when a part of a film, an area, a component or the like is on or on another part, not only the case where the part is directly on the other part but also another film, area, And the like.

In the drawings, components may be exaggerated or reduced in size for convenience of explanation. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and thus the present invention is not necessarily limited to those shown in the drawings.

1 is a cross-sectional view illustrating a pneumatic tire manufactured according to a tire manufacturing method according to an embodiment of the present invention.

1, the pneumatic tire 10 manufactured by the tire manufacturing method of the present invention has a tread portion 1, a side wall 2, a bead portion 3, a belt layer 4, (5).

The tread portion 1 is disposed outside the carcass layer 5 and the belt layer 4 in the tire radial direction. The tread portion 1 is a portion in contact with the ground at the time of traveling of the vehicle, and a predetermined pattern can be formed. The tread portion 1 may have a block 1a formed between a groove 1b and a groove 1b which extend in the radial direction of the pneumatic tire 10.

The sidewalls 2 extend from both ends of the tread portion 1. A carcass layer 5 may be disposed on the inner side of the sidewall 2. The bead portion 3 is formed at an end portion of the side wall 2 and is in close contact with a tire wheel (not shown).

The belt layer 4 can improve the durability of the pneumatic tire 10 and form a skeleton. The belt layer 4 is disposed under the tread portion 1 and can be formed by rolling a plurality of belt cords (not shown) made of steel or organic fiber material with rubber.

The carcass can constitute the skeleton of the pneumatic tire 10. The carcass layer 5 may be formed by coating a plurality of carcass cords (not shown) made of steel or fiber organic material with rubber and rolling.

FIG. 2 is a cross-sectional view illustrating a bladder 100 for vulcanizing a tire according to an embodiment of the present invention, and FIG. 3 is an enlarged view of the bulged portion 110 of FIG.

Referring to FIGS. 2 and 3, the tire vulcanization bladder 100 may include an expansion portion 110, a first shoulder portion 120, and a second shoulder portion 130. The bladder 100 for vulcanizing the tire is installed in a tire vulcanizing apparatus to be described later and is used in the vulcanization process of the green tire.

The expansion portion 110 can contact the inner circumferential surface of the green tire when the bladder 100 for vulcanizing the tire expands. That is, the expansion portion 110 corresponds to the tread of the green tire. The expanding portion 110 may have a flat surface 111 and an emmye 112.

The flat surface 111 may have a predetermined width in the first direction. The first direction is a direction connecting the first shoulder 120 and the second shoulder 130, a rising or falling direction of the center shaft 210 of the tire vulcanizer 200 (see FIG. 6A) Can be defined in the tread width direction.

The width t of the flat surface 111 may have a length of any one of 40 mm to 110 mm. When the width t of the flat surface 111 is less than 40 mm, the emblem 112 is folded twice or more when the tire vulcanizing bladder 100 is accommodated in the tire vulcanizer 200. If the width of the flat surface 111 is larger than 110 mm, the flat surface 111 occupies a larger portion of the expanded portion 110, so that the force or adhesive force for pressing the tire by the bulged portion 110 can be reduced.

The width t of the flat surface 111 may have a length of any one of 27% to 34% of the distance R between the flat surface 111 and the center axis of the tire vulcanizing bladder 100. If the width t of the flat surface 111 is smaller than 27% of the distance R between the flat surface 111 and the center axis of the vulcanizing bladder 100, the tire vulcanizing bladder 100 The emblem 112 is folded twice or more when the tire vulcanizer 200 is accommodated. If the width t of the flat surface 111 is larger than 34% of the distance R between the flat surface 111 and the central axis of the tire vulcanizing bladder 100, (111) occupies a large proportion, so that the force or the adhesive force that presses the green tire by the bulging portion (110) can be reduced.

The flat surface 111 may extend in the circumferential direction of the bladder 100 for tire vulcanization. The flat surface 111 can be disposed at the center of the bulging portion 110 when the bladder 100 for vulcanizing the tire expands.

The emblem 112 may extend on both sides of the flat surface 111, and a plurality of embosses may be disposed on the outer surface. The em view 112 may be disposed between the flat surface 111 and the first shoulder 120 or the second shoulder 130. The emboss 112 may have a predetermined roughness by arranging a plurality of embossments on the outer surface. In FIG. 2, the protuberance emboss is shown. However, it is not limited thereto, and a continuous pattern or an emboss pattern may have various shapes to form a predetermined surface roughness.

The MMB 112 can form an adhesive force and a pressing force on the inner circumferential surface of the green tire during the vulcanization process. When the tire vulcanizing bladder 100 is inflated, the em view 112 is expanded toward the side wall or the shoulder portion of the green tire.

The sidewall or shoulder of the green tire has a curved shape and the pneumatic tire produced must withstand the load. Therefore, when the bladder 100 for vulcanizing the tire expands, a strong pressure must be applied to the side wall or the shoulder portion of the green tire. At this time, the expansion portion 110 of the bladder 100 for vulcanizing the tire and the inner peripheral surface of the green tire A considerable amount of adhesive force or compression force must be formed.

The embossing formed on the em mark 112 is in contact with the inner circumferential surface of the green tire, so that an adhesive force or a pressing force of a predetermined size can be formed. Thus, the tire vulcanization bladder 100 can effectively transmit the pressure generated at the time of inflation to the shoulder portion of the green tire or both ends of the tread.

The em view 112 may have a predetermined width d. The em view 112 may be arranged to be symmetrical with respect to the flat surface 111. Also, the MMB 112 may extend toward the first shoulder 120 or the second shoulder 130, and may be partially overlapped.

4 is a cross-sectional view taken along line IV-IV in FIG. 3, and FIG. 5 is a cross-sectional view taken along line V-V in FIG.

Referring to FIGS. 2 to 5, the bulge portion 110 may include a plurality of grooves 115. The plurality of grooves 115 may be divided into a first groove 113 and a second groove 114 depending on the arrangement or length. The plurality of grooves 115 may be arranged to have a slope at the center line Cl of the expanding portion 110. That is, the plurality of grooves 115 may be arranged in an oblique and parallel manner.

The plurality of grooves 115 may serve as a passage for discharging the air existing inside the green tire to the outside when the expanding portion 110 is inflated. That is, when the tire vulcanizing bladder 100 is inflated, air in the region surrounded by the tire vulcanizing bladder 100 and the green tire can move along the plurality of grooves and be discharged to the outside.

The first groove 113 may extend along one side of the em view 112 at one end of the flat surface 111. A portion of the first groove 113 is disposed on the flat surface 111, and the other portion is disposed on the emmb 112. The first groove 113 is formed at least partially on the flat surface 111 so that the air in the flat surface 111 can be discharged to the outside when the inflated portion 110 expands.

The second grooves 114 are disposed between the first grooves 113 and may be disposed on only one side of the MMB 112. The second grooves 114 may be disposed between neighboring first grooves 113 and may be disposed in parallel with the first grooves 113. The second groove 114 is formed only in the MMB 112 and can discharge the air in the MMB 112 to the outside. The air flows toward the first shoulder portion 120 or the second shoulder portion 130 of the bladder 100 for vulcanizing the tire when the inflating portion 110 is inflated so that both ends of the flat surface 111, The air flow is increased in the view 112. The second groove 114 guides the flow of the air on the MMB 112 so that air can be easily discharged to the outside.

 The first shoulder portion 120 extends from one end of the bulge portion 110 and extends toward the hub 230 of the tire vulcanizer 200 described later (see FIG. 6A). The first shoulder 120 may include a first insertion protrusion 121 inserted into the hub 230 and an inclined portion 122 supporting the first insertion protrusion 121.

The second shoulder 130 includes a second insertion protrusion 131 fixed to the post 220 of the tire vulcanizer 200 and a turning part 132 bent toward the second insertion protrusion 131 can do. The turning part 132 is formed to be bent at about 90 degrees so that the second insertion protrusion 131 can be fixed to the post 220. [

In Table 1 below, sizes according to the outer diameter of each tire vulcanizing bladder were classified. As shown in Fig. 7A or Fig. 7B, the folded portion is a portion where the expansion portion is folded at least twice or more, and the position of the folded portion is a result of measuring a distance away from the center line Cl of the expansion portion. A (%) is a ratio of the lower limit of the flat surface (twice the position of the folded portion) to the distance (1/2 of the outer diameter) from the central axis of the tire vulcanizing bladder to the flat surface, and B (% (110 mm) of the flat surface with respect to the distance (1/2 of the outer diameter) from the central axis of the vulcanizing bladder to the flat surface.

Bladder Folded portion  location
(mm) A ( % ) B ( % ) Bladder Folded portion  location
(mm) A ( % ) B ( % ) standard Outside diameter (mm) standard Outside diameter (mm) One 600 28 18.7 36.7 11 705 38 21.6 31.2 2 560 30 21.4 39.3 12 550 25 18.2 40 3 645 30 18.6 34.1 13 520 28 21.5 42.3 4 630 30 19.0 34.9 14 515 25 19.4 42.7 5 640 30 18.8 34.4 15 495 25 20.2 44.4 6 610 35 22.9 36.1 16 470 25 21.3 46.8 7 635 30 18.9 34.6 17 530 28 21.1 41.5 8 550 30 21.8 40.0 18 485 25 20.6 45.4 9 555 38 27.4 39.6 19 515 25 19.4 42.7 10 545 30 22.0 40.4

Referring to Table 1, the highest point of A is 27.3874% (specification 9) and the lowest point of B is 34.1085 (specification 4). Therefore, the width t of the flat surface 111 of the bladder 100 for tire vulcanization according to the present invention is larger than 27% of the distance R between the flat surface and the center of the bladder for tire vulcanization, It should be small.

Referring to FIG. 7A, the conventional bladder for tire vulcanization has a reduced life due to the folded portion formed in the embossed portion. However, referring to FIG. 7B, the size of the flat surface 111 may be set so that the folded portion is formed on the flat surface 111 like the bladder 100 for a tire vulcanizing of the present invention, and the service life may increase.

 The bladder 100 for tire vulcanization according to an embodiment of the present invention sets the range of the width t of the flat surface 111 according to the outer diameter so that the tire vulcanization bladder 100 Is formed on the flat surface 111, so that the life of the tire vulcanizing bladder 100 can be improved.

The tire vulcanizing bladder 100 according to an embodiment of the present invention may be configured such that a first groove 113 and a second groove 114 having different lengths are disposed and the tire is vulcanized at the time of expansion of the tire vulcanizing bladder 100 The air inside the green tire can be easily discharged.

 6A to 6C are views showing steps of manufacturing a tire using the tire vulcanizing apparatus 200 according to another embodiment of the present invention.

6A to 6C, the tire vulcanizer 200 may include a central shaft 210, a post 220, a bladder 100 for tire vulcanization, a hub 230, and a supporter 240 .

The central axis 210 can move up and down. The center shaft 210 is lifted and the green tire T can be mounted on the tire vulcanizer 200. In addition, the center shaft 210 can be lifted to take out the green tire T that has been completed. The process can be performed by pressing the green tire T while the central axis 210 is lowered.

The post 220 is installed on the upper side of the center shaft 210. The post 220 may have an inner space capable of receiving the bladder 100 for tire vulcanization. A green tire T may be mounted on the outside. The post 220 may include a first casing 221 disposed on the outer side and a second casing 222 disposed on the inner space. The second insertion protrusion 131 may be fixed between the first casing 221 and the second casing 222.

A mounting member 223 for fixing the green tire T may be provided on the outer side of the first housing 221. The mounting member 223 extends along the outer side of the first casing 221 and the shoulder portion of the green tire T can be fixed.

The hub 230 may be installed at the upper end of the center shaft 210. The hub 230 may be connected to the first insertion protrusion 121 of the bladder 100 for tire vulcanization. Since the hub 230 is fixed to the upper end of the center shaft 210, the hub 230 can move in accordance with the linear movement of the center shaft 210.

The supporter 240 is installed such that at least a part of the post 220 is inserted. The green tire T mounted on the post 220 is supported on one side of the supporter 240 so that the pressure generated in the bladder 100 for vulcanizing the tire is applied to the shoulder of the green tire T Lt; / RTI >

The tire vulcanizing bladder 100 is folded at least twice when the flat surface 111 is folded in the post 220 and the emblem 112 is not folded at least twice more. That is, since the flat surface 111 has a predetermined width in accordance with the outer diameter of the green tire T, when the bladder 100 for tire vulcanization contracts to accommodate the post 220, only the flat surface 111 It is folded more than once.

A method of manufacturing a tire using the bladder 100 for a vulcanizing tire and the tire vulcanizing apparatus 200 having the same is as follows.

A step of mounting a green tire on a post provided at the upper end of the central shaft; expanding a bladder for tire vulcanization installed in the inner space of the post to the inner circumferential surface of the green tire while descending the central axis; Discharging the air between the bladder into the first groove and the second groove formed on one side of the tire vulcanizing bladder; and drawing the molded green tire from the post, the tire vulcanizing bladder being folded into the inner space of the post Lt; / RTI >

First, as shown in FIG. 6A, the bladder 100 for vulcanizing a tire is accommodated in the inner space of the post 220 in a state in which the central axis 210 is elevated. At this time, the flat surface 111 of the bladder 100 for vulcanizing tire is folded as shown in FIG. 7B. That is, the flat surface 111 is folded at least twice.

The green tire T is fixed to the mounting member 223 by the tire mounting unit 250 such as 6b in the step of mounting the green tire on the post located at the upper end of the central shaft.

In the step of expanding the bladder for tire vulcanization, as shown in FIG. 6C, while the central axis 210 is lowered, the tire mounting unit 250 is pressed downward to support the green tire T on the supporter 240. At this time, the bladder for vulcanizing the tire expands and the bulging portion 110 is brought into contact with the inner circumferential surface of the green tire T, and the first shoulder portion 120 and the second shoulder portion 130 contact the inner surface of the green tire T, It comes into contact with the month.

At this time, air is discharged to the plurality of grooves. The air between the inner circumferential surface of the green tire T and the bladder 100 for tire vulcanizing moves along the first groove 113 and the second groove 114 formed on one surface of the vulcanizing bladder 100, . Since the first groove 113 is formed in the flat surface 111 and the emboss 112, the air in the center of the expansion part 110 can be easily discharged to the outside. In addition, since the second groove 114 is formed only in the MMB 112, a large amount of air moved to the MMB 112 can be easily discharged.

The green tire T is drawn out from the post 220 and the bladder 100 for tire vulcanization is folded into the inner space of the post 220 and accommodated. 6A, the tire vulcanizing bladder 100 shrinks and the center shaft 210 rises. Thereafter, the tire mounting unit 250 can take out the molded green tire T from the post 220. When the tire vulcanizing bladder 100 shrinks, at least two folding portions are generated as shown in Fig. 7B. This folded portion can be accommodated in the inner space of the post 220 while being placed on the flat surface 111.

 FIG. 7A is a photograph showing a folded portion of a conventional tire vulcanizing bladder, and FIG. 7B is a photograph showing a folded portion of the tire vulcanizing bladder of FIG. 2. FIG.

As shown in FIG. 7A, the conventional bladder for tire vulcanization is formed in the embossed portion where the folded two or more times as shown. The embossing is easily tired by bending or folding by the protruding embossing, and the life is shortened.

7B, the tire vulcanizing bladder 100 according to an embodiment of the present invention sets the width t of the flat surface 111 according to the size of the bladder 100 for vulcanizing the tire. That is, the width t of the flat surface 111 is set so that a portion folded twice or more in the tire vulcanizing bladder 100 is formed on the flat surface 111. Thus, the tire vulcanizing bladder 100 can reduce the fatigue caused by the folding and bending that occurs when the tire vulcanizing bladder 100 is accommodated in the post 220 of the tire vulcanizing apparatus 200, and the lifetime of the tire vulcanization bladder 100 can be shortened .

 In the tire vulcanizing bladder 100 according to an embodiment of the present invention, the positions of the first groove 113 and the second groove 114 are set differently so that the air inside the green tire T can be quickly discharged have.

The tire vulcanizing apparatus 200 and the tire manufacturing method using the tire vulcanizing apparatus 200 according to another embodiment of the present invention are configured such that when the bladder 100 for vulcanizing tire is received in the post 220, the flat surface 111 is folded twice more, Since the width of the tire vulcanizer 200 is set, the life of the tire vulcanizer 200 can be increased.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the exemplary embodiments, and that various changes and modifications may be made therein without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: Bladder for tire vulcanization
110: Expansion part
111: Flat face
112: Look at Em
113: first groove
114: second groove
120: first shoulder
130: second shoulder
200: Tire vulcanization device
210: center axis
220: Post

Claims (14)

A bladder for vulcanizing a tire for forming the green tire in contact with an inner peripheral surface of a green tire at vulcanization,
An expansion portion corresponding to the tread of the green tire at the time of molding and a shoulder portion extending to both sides of the expansion portion,
The expansion unit
A flat surface having a predetermined width in the first direction and disposed in the center of the expanding portion in the first direction;
A plurality of embossments extending to both sides of the flat surface and protruding outwardly are arranged on the outer side;
A first groove extending along one surface of the embossed surface at one end of the flat surface; And
And a second groove disposed between the first grooves and disposed only on one surface of the M brow,
And the length of the second groove is shorter than the length of the first groove. The method according to claim 1,
The width of the flat surface
And has a length of any one of 40 mm to 110 mm. The method according to claim 1,
The width of the flat surface
Has a length of any one of 27% to 34% of the distance between the flat surface and the central axis of the tire vulcanizing bladder. The method according to claim 1,
The air between the inner circumferential surface of the green tire and the outer surface of the bulging portion
And when the bladder for vulcanizing the tire is inflated, the bladder is discharged through the first groove and the second groove. The method according to claim 1,
Wherein when the bladder for vulcanizing the tire is contracted, the flat surface is folded at least twice. A center axis for moving up and down;
A post which is installed above the center shaft and has an internal space and into which a green tire is inserted;
A bladder for tire vulcanizing which is fixed to the post at one end, contacts the inner circumferential surface of the green tire at the time of inflation, and is accommodated in the inner space of the post at the time of contraction;
A hub fixed to the other end of the tire vulcanizing bladder and installed at the upper end of the central shaft; And
And a supporter installed to insert at least a part of the post and supporting the green tire when the center shaft descends,
The tire vulcanizing bladder
A flat surface corresponding to the tread of the green tire at the time of molding and having a predetermined width in the first direction and disposed at the center of the first direction and a plurality of embossed portions extending outwardly from both sides of the flat surface, An expanding part having an emmade arranged on the outer side; And
And a shoulder portion extending on both sides of the expansion portion,
Wherein the thickness of the mbark is thicker than the thickness of the flat surface. The method according to claim 6,
The width of the flat surface
And has a length of any one of 40 mm to 110 mm. The method according to claim 6,
The width of the flat surface
Has a length of any one of 27% to 34% of the distance between the flat surface and the central axis. The method according to claim 6,
The expansion unit
A first groove extending along one surface of the embossed surface at one end of the flat surface; And
And a second groove disposed between the first grooves and disposed only on one surface of the M brow. 10. The method of claim 9,
The air between the inner circumferential surface of the green tire and the outer surface of the bulging portion
And the tire vulcanizing bladder is discharged through the first groove and the second groove when the bladder for vulcanizing the tire expands. Attaching a green tire to a post installed at an upper end of the central shaft;
Expanding the bladder for tire vulcanization provided in the inner space of the post to the inner circumferential surface of the green tire while descending the central axis;
Discharging air between the inner circumferential surface of the green tire and the bladder for vulcanizing the tire into a first groove and a second groove formed on one surface of the bladder for vulcanizing the tire; And
Wherein the molded green tire is drawn out from the post and the bladder for vulcanizing the tire is folded and received into the inner space of the post,
The bladder for vulcanizing a tire,
A flat surface corresponding to the tread of the green tire at the time of molding and having a predetermined width in the first direction and disposed at the center of the first direction and a plurality of embossed portions extending outwardly from both sides of the flat surface, An expanding portion having an em view disposed on an outer surface thereof; And
And a shoulder portion extending to both sides of the expansion portion,
Wherein the first groove extends along one surface of the first surface of the flat surface and the second groove is disposed between the first grooves and is disposed on only one surface of the first surface,
And the length of the second groove is shorter than the length of the first groove. 12. The method of claim 11,
The step of accommodating the tire vulcanizing bladder includes:
Wherein the flat surface is folded at least twice to insert the bladder for vulcanizing the tire into the inner space of the post. 12. The method of claim 11,
The width of the flat surface
And has a length of any one of 40 mm to 110 mm. 12. The method of claim 11,
The width of the flat surface
Of the distance between said flat surface and said central axis.

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