JP2014217953A - Tire manufacturing method and tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tire in which sealant is adhered to the inner surface with good weight balance.SOLUTION: A tire manufacturing method for manufacturing a tire 1 in which sealant 8 is adhered to the inner surface 1a includes a rotation start process in which the tire 1 is rotated relatively against the discharge port 16a of the sealant 8 and an adhering process in which, after the rotation start process, the sealant 8 is discharged from the discharge port 16a and is adhered to the inner surface 1a of the tire 1 spirally in the tire circumferential direction from one side to the other side in the width direction of the tire 1, while the tire 1 is being rotated relatively against the discharge port 16a. In the adhering process, and in the view of a cross section in the width direction of the tire 1, the angle formed by the discharge direction of the discharge port 16a against the radial direction of the tire 1 when the sealant 8 is discharged to the width direction outside part of the tire inner surface 1a is made larger than the angle formed by the discharge direction of the discharge port 16a against the radial direction of the tire 1 when the sealant 8 is discharged to the width direction central part of the tire inner surface 1a.

Description

  The present invention relates to a tire manufacturing method for manufacturing a tire having an inner surface attached with a sealant and a tire manufactured by the tire manufacturing method.

  Conventionally, a sealant made of a viscous rubber material or the like has been applied to the tire inner surface, and even if a through hole is created in the tread portion of the tire due to nailing, etc., the through hole is automatically made with the sealant. A pneumatic tire that is sealed to suppress tire puncture is known. As a method of manufacturing such a self-sealing type pneumatic tire, for example, the sealant discharged from the discharge port of the sealant supply device is elongated and spiraled toward the tire circumferential direction on the inner surface of the vulcanized tire. There is known a method in which the film is pasted on (see, for example, Patent Document 1).

JP 2001-18609 A

  In recent years, tires have been reduced in weight to improve vehicle fuel efficiency, and a slight loss of weight balance can cause vibrations in the tire. Therefore, a high weight balance is also required for the sealant attached to the tire inner surface. ing.

  However, in the above-described conventional tire manufacturing method, the sealant having a high viscosity property is discharged from the discharge port and attached to the inner surface of the tire, so that the tip of the sealant discharged from the discharge port at the start of application is There is a risk of becoming a lump and deteriorating the weight balance in the tire circumferential direction. In the conventional method, the sealant discharge start position is set to the outer side in the width direction of the tire inner surface in order to paste the sealant in a spiral shape, but the outer side in the width direction of the tire inner surface is usually directed upward. Therefore, there is a risk that the portion of the sealant that has become a lump at the tip of the sealant hangs down toward the center in the tire width direction and deteriorates the weight balance in the tire width direction.

  An object of the present invention is to solve such problems of the prior art, and an object of the present invention is to provide a tire in which a sealant is attached to the inner surface with a good weight balance. An object of the present invention is to provide a manufacturing method and a tire in which a sealant is attached to an inner surface with a good weight balance.

The tire manufacturing method of the present invention includes a rotation start step of rotating the tire relative to the sealant discharge port, and the discharge port after the rotation start step while rotating the tire relative to the discharge port. And a sticking step of spirally sticking the sealant in the circumferential direction of the tire from one side in the width direction of the tire to the other side of the tire in the tire inner direction. In the cross-sectional view of the tire in the width direction, an angle formed by a discharge direction of the discharge port with respect to the tire radial direction when a sealant is discharged to the outer side in the width direction of the tire inner surface is a width of the tire inner surface. The discharge direction of the discharge port when discharging the sealant to the central portion in the direction is larger than an angle formed with respect to the tire radial direction.
According to the tire manufacturing method of the present invention, since the discharge of the sealant toward the inner surface of the tire is started while rotating the tire relative to the discharge port of the sealant, the sealant discharged from the discharge port It is possible to reduce the lump produced at the front end of the sealant at the start of application by extending the front end portion of the sealant by relative rotation between the discharge port and the tire. In addition, the discharge port for discharging the sealant to the center portion in the width direction of the tire inner surface is an angle formed by the discharge direction of the discharge port with respect to the tire radial direction when the sealant is discharged to the width direction outer side portion of the tire inner surface. When the sealant is applied to the inner surface of the tire whose outer side in the width direction is curved, the sealant discharged from the discharge port is removed from the tire. Since it can be applied almost perpendicularly to the curved inner surface of the outer portion in the width direction, the contact area of the sealant with the inner surface of the tire can be increased to reduce the dripping of the sealant toward the center in the tire width direction. . Thereby, since the weight balance of both the tire circumferential direction and the axial direction of the sealant affixed to the inner surface of the tire can be increased, a tire having the sealant affixed to the inner surface with a good weight balance can be obtained. .

In the tire manufacturing method of the present invention, it is preferable to apply the sealant while increasing the distance between the discharge port and the inner surface of the tire at the start of the application process.
According to this configuration, the tip portion of the sealant discharged from the discharge port at the start of the sticking process can be stretched by the dead weight of the sealant in addition to the relative rotation of the discharge port and the tire. The lump generated at the tip of the sealant can be further reduced, and the weight balance of the sealant attached to the inner surface of the tire can be further increased.

In the tire manufacturing method of the present invention, it is preferable to perform a rotation stopping step of stopping the relative rotation of the tire with respect to the discharge port after the pasting step.
According to this configuration, the sealant that emerges while slowly dripping from the discharge port at the end of the pasting process can be stretched by the relative rotation of the discharge port and the tire, so that a lump generated at the end of the sealant at the end of the pasting process (Dama) can be reduced, and the weight balance of the sealant attached to the inner surface of the tire can be further increased.

In the tire manufacturing method of the present invention, it is preferable that the affixing step is completed while reducing the distance between the discharge port and the inner surface of the tire.
According to this configuration, even if the discharge amount of the sealant from the discharge port is reduced at the end of the pasting step, the inner surface of the tire can be reliably secured without interrupting the sealant stretched between the discharge port and the inner surface of the tire. Therefore, the weight balance of the sealant attached to the inner surface of the tire can be further increased.

In the tire manufacturing method of the present invention, the discharge pressure of the sealant from the discharge port at the start of the attaching step is made smaller than the discharge pressure of the sealant from the discharge port after the start of the attaching step. Is preferred.
According to this configuration, by reducing the discharge amount of the sealant from the discharge port at the start of the sticking process, it is possible to further reduce the lump that is generated at the tip of the sealant at the start of sticking. The weight balance of the sealing agent affixed to the inner surface can be further increased.

The tire of the present invention is manufactured by the above tire manufacturing method.
According to the tire of the present invention, the weight balance of the tire in which the sealant is attached to the inner surface can be increased.

  ADVANTAGE OF THE INVENTION According to this invention, the tire by which the sealing agent was affixed on the inner surface with sufficient weight balance can be provided, and the tire by which the sealing agent was affixed on the inner surface with good weight balance can be provided.

It is sectional drawing which shows an example of the tire which is one embodiment of this invention of this invention. FIG. 2 is a plan view showing a part of the inner surface of the tire shown in FIG. 1. It is explanatory drawing which shows roughly an example of the manufacturing apparatus which manufactures the tire shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  A tire 1 according to an embodiment of the present invention shown in FIG. 1 is a tubeless pneumatic tire that is assembled in an application rim (not shown) and is used in a state where a predetermined internal pressure is filled therein. The tire 1 includes a pair of left and right bead portions 2, a pair of sidewall portions 3 connected to the bead portions 2, and a tread portion 4 provided between the sidewall portions 3. A carcass 5 formed by one or more carcass plies extends in a toroid shape between a pair of bead cores 6 embedded in each bead part 2 and extends between the pair of sidewall parts 3 and the tread part 4. The end portion of the carcass 5 is folded around the bead core 6. A belt 7 composed of a plurality of belt layers is embedded outside the carcass 5 of the tread portion 4 in the tire radial direction.

  A sealant 8 is affixed to the inner surface 1 a of the tire 1. In the present embodiment, the sealant 8 is attached only to the inner surface 1a of the portion corresponding to the inner side of the tread portion 4 of the tire 1, and the sealant layer 9 is formed on the inner surface 1a. The sealant 8 has high adhesiveness, and automatically seals the through hole formed in the tread portion 4 of the tire 1 by stepping on a nail or the like to prevent air leakage from the through hole. Puncture can be suppressed. That is, the tire 1 is a self-sealing pneumatic tire.

  Examples of the sealant 8 include unvulcanized or semi-cured butyl rubber, a plasticizer such as polyisobutylene and polybutene, a tackifier such as a thermoplastic olefin / diolefin copolymer, and carbon black. Although what mix | blended these reinforcing materials can be used, it is not restricted to this, The other well-known sealing agent used conventionally can also be used. Moreover, if the sealing agent 8 is affixed to at least a portion corresponding to the inside of the tread portion 4 of the inner surface 1 a of the tire 1, it can be affixed to the inner surface 1 a other than the portion corresponding to the inside of the tread portion 4. .

  As shown in FIG. 2, the sealant layer 9 is formed in a spiral shape in the circumferential direction of the tire 1 from the one side in the tire width direction to the other side on the inner surface 1 a of the tire 1 with the sealant 8 as an elongated strip shape. It is formed by pasting. As shown in FIG. 1, the belt-like sealant 8 is laminated and disposed so that parts in the tire width direction overlap each other. Thereby, the inner surface 1a corresponding to the inner side of the tread portion 4 of the tire 1 is covered with the sealant layer 9 without a gap. Therefore, the through hole generated in the tread portion 4 of the tire 1 can be reliably sealed with the sealant 8.

  Next, a method for manufacturing the tire 1 will be described. FIG. 3 is an explanatory view schematically showing an example of a manufacturing apparatus for manufacturing the tire shown in FIG. 1, and the tire 1 can be manufactured using the manufacturing apparatus 10.

  The manufacturing apparatus 10 includes a tire rotating device 11 for rotating the tire 1. The tire rotating device 11 includes a plurality of rollers 12 that are disposed above and below the tire 1 with the axial direction being horizontal. These rollers 12 can rotatably support the tire 1 in a standing posture, that is, a posture in which the tread surface 4 a that is the outer peripheral surface of the tread portion 4 is in contact with the outer peripheral surface of the roller 12. One roller 12 is connected to a drive motor 13, and the tire 12 supported by the roller 12 can be rotated by rotating the roller 12 by the drive motor 13. As the drive motor 13, for example, a servo motor is used, and the rotation position and the rotation speed of the tire 1 are controlled to have preset values. Note that another motor may be used as the drive motor 13, and the rotational position of the tire 1 may be controlled by detecting the rotational position of the tire 1 using a rotational position sensor or the like.

  The manufacturing apparatus 10 includes a sealant application robot 14 (hereinafter also referred to as a robot 14). As this robot 14, an industrial robot having at least three axes of freedom can be used. The robot 14 can perform a predetermined operation recorded in advance by teaching.

  A nozzle 16 to which a sealant is supplied from a sealant supply device 15 is attached to the tip of the arm 14 a of the robot 14, and a sealant discharge port 16 a is provided at the tip of the nozzle 16. The discharge port 16a of the nozzle 16 is directed downward. The robot 14 can move the nozzle 16 provided with the discharge port 16a in the width direction (axial direction) and the radial direction (vertical direction in FIG. 3) of the tire 1 as indicated by arrows in the drawing. Further, the robot 14 has a nozzle 16 with respect to the radial direction of the tire 1 when the discharge direction of the discharge port 16a is in a cross-sectional view in the width direction of the tire 1 (cross-sectional view perpendicular to the circumferential direction of the tire 1) shown in FIG. It can be rotated to tilt. That is, the nozzle 16 (discharge port 16 a) is driven by the robot 14 and can move in the width direction and the radial direction of the tire 1 and can tilt with respect to the radial direction of the tire 1.

  The sealant supply device 15 includes a disk-shaped platen 18 disposed in a storage container 17 such as a pail can in which the sealant 8 is stored, and pushes the platen 18 toward the inside of the storage container 17 so that the storage container 17 A pressurizing cylinder 19 that pressurizes the inside, and a discharge pump 20 that is connected to the platen 18 and feeds the sealing agent 8 stored in the storage container 17 toward the discharge port 16a. The discharge port 16 a is connected to the discharge pump 20 via the supply path 21. The platen 18 can be heated, and the heated platen 18 is pushed toward the inside of the storage container 17 by the pressurizing cylinder 19, and the discharge pump 20 is operated in this state so that the platen 18 is stored in the storage container 17. The sealing agent 8 having high adhesiveness can be pumped to the discharge port 16 a of the nozzle 16.

  The nozzle 16 is provided with a shutter (not shown). By opening the shutter, the sealant 8 pumped from the container 17 can be discharged from the discharge port 16a. Moreover, by closing the shutter, the discharge of the sealing agent 8 from the discharge port 16a can be stopped. As described above, the start and stop of the discharge of the sealing agent 8 from the discharge port 16 a are controlled by the shutter provided in the nozzle 16.

  The tire rotating device 11, the robot 14, and the sealant supply device 15 are each connected to a control device (not shown), and their operations are integrated and controlled by the control device.

  Next, the procedure of the tire manufacturing method which is one embodiment of the present invention performed using the manufacturing apparatus 10 will be described.

  First, the vulcanized tire 1 vulcanized and formed in the vulcanization process is set on the tire rotating device 11 and the drive motor 13 is activated to rotate the tire 1 relative to the discharge port 16a of the sealant 8 ( Rotation start step). The tire 1 set in the tire rotating device 11 is different from the tire 1 shown in FIG. 1 in that the sealant 8 is not attached to the inner surface 1a. .

  Next, the sealant 8 is discharged from the discharge port 16 a of the sealant 8 while the tire 1 is rotated relative to the discharge port 16 a, and the sealant 8 is applied to the inner surface 1 a of the tire 1. Attaching spirally in the circumferential direction of the tire 1 from one side of the direction to the other side (attaching step). In this affixing step, first, the sealant supply device 15 is activated, and pressure feeding of the sealant 8 accommodated in the container 17 toward the discharge port 16a is started. Then, when the nozzle 16 is moved to a predetermined position on the inner surface 1a of the tire 1 with the discharge port 16a directed downward by the robot 14, the shutter of the nozzle 16 is opened and the inner surface 1a of the tire 1 from the discharge port 16a. The sealing agent 8 is discharged toward When the tip of the sealant 8 discharged from the discharge port 16a contacts the inner surface 1a of the tire 1, the tip of the sealant 8 discharged from the discharge port 16a is stretched by the relative rotation of the tire 1 with respect to the discharge port 16a. Affixed to the inner surface 1 a of the tire 1. Thus, when the sealing agent 8 is discharged from the discharge port 16a, the tire 1 rotates relative to the discharge port 16a, so that the front end portion of the sealant 8 discharged from the discharge port 16a becomes the discharge port 16a. Stretching and smoothing between the inner surface 1a of the tire 1 and generation of a lump at the tip of the sealant 8 are reduced.

  Further, in the attaching step, when the sealant 8 is discharged to the outer side in the width direction of the inner surface 1 a of the tire 1, the discharge direction of the discharge port 16 a is the radial direction of the tire 1 in the cross-sectional view of the tire 1 shown in FIG. The discharge direction of the discharge port 16a when the sealant 8 is discharged to the central portion in the width direction of the inner surface 1a of the tire 1 is made larger than the angle formed with respect to the radial direction of the tire 1. Yes. As a result, as shown in the drawing, the inner surface 1a of the tread portion 4 of the tire 1 is curved so that the inner diameter of the tire gradually decreases from the center in the tire width direction toward the outer side in the width direction. In the case of the shape, the discharge port 16a can always be oriented so that the discharge direction is perpendicular to the curved inner surface 1a of the tire 1. Therefore, at the position where the sealant 8 is pasted, the discharge direction of the discharge port 16a is inclined by a predetermined angle α with respect to the radial direction of the tire 1 as shown by a two-dot chain line in FIG. Therefore, the front end portion of the sealant 8 discharged from the discharge port 16a can be attached to the curved inner surface 1a at the outer side in the width direction of the tire 1 vertically. The front end portion of the sealant 8 is attached perpendicularly to the inner surface 1a at the outer side in the width direction of the tire 1, thereby increasing the contact area of the sealant 8 with the inner surface 1a of the tire 1 so that the inner surface 1a is horizontal. Even if the curved surface is inclined, it is possible to prevent the tip portion of the sealant 8 from drooping toward the center in the width direction of the tire 1.

  In the present embodiment, the discharge port 16a is tilted so that the discharge direction is always perpendicular to the curved inner surface 1a of the tire 1, but the discharge of the sealant 8 is started. It is also possible to tilt the discharge port 16a so that the discharge direction is perpendicular to the inner surface 1a of the tire 1 only at the outer portion in the tire width direction.

  Further, in the present embodiment, the discharge pressure of the sealant 8 from the discharge port 16a at the start of the sticking process (when the shutter of the nozzle 16 is opened) is changed to the discharge pressure of the sealant 8 from the discharge port 16a. The discharge pressure of the sealant 8 from the discharge port 16a after a predetermined time has elapsed since the discharge of the liquid was discharged. That is, the discharge pressure of the sealant 8 from the discharge port 16a is made smaller than the predetermined pressure when the shutter of the nozzle 16 is opened, and the discharge pressure is gradually increased from that state to the predetermined pressure. Thereby, the discharge amount of the sealant 8 at the start of discharge can be reduced, and the generation of a lump at the tip of the sealant 8 can be further reduced. This discharge pressure can be controlled by controlling the operation of the discharge pump 20. Note that the discharge pressure of the sealant 8 from the discharge port 16a is not limited to being gradually increased to a predetermined pressure after the shutter of the nozzle 16 is opened, but is gradually increased to a predetermined pressure, or is increased to a predetermined pressure. You may make it raise rapidly.

  Furthermore, in the present embodiment, at the start of the pasting step, the discharge port 16a is moved in the direction away from the inner surface 1a of the tire 1 by the operation of the robot 14 (the tire radial direction indicated by the arrow in FIG. 3). The sealant 8 is applied to the inner surface 1 a of the tire 1 while gradually increasing the distance between the tire 16 and the inner surface 1 a of the tire 1. As a result, the tip portion of the sealant 8 discharged from the discharge port 16a is stretched by its own weight between the discharge port 16a and the inner surface 1a of the tire 1, so that the tip of the sealant 8 is a lump. Generation is further reduced. The interval between the discharge port 16a and the inner surface 1a of the tire 1 is not limited to gradually increasing, but may be increased stepwise up to a predetermined interval, or rapidly increased to a predetermined interval. Good.

  As described above, in the present invention, the generation of lumps at the tip of the sealant 8 is reduced, and the tip portion of the sealant 8 with the lumps reduced is securely attached to the curved portion of the inner surface 1a of the tire 1. Therefore, the weight balance of both the tire circumferential direction and the axial direction of the sealant 8, that is, the sealant layer 9, can be increased.

  After the front end portion of the sealant 8 discharged from the discharge port 16a contacts the inner surface 1a of the tire 1, the sealant 8 continuously discharged from the discharge port 16a is attached to the inner surface 1a of the tire 1 sequentially. At this time, the discharge port 16a is moved at a predetermined speed in the width direction (axial direction) of the tire 1 by the robot 14, and the sealant 8 is first moved from one side to the other side in the width direction of the tire 1. The sealant 8 is pasted in a spiral shape so that a part of the sealant 8 to be attached later overlaps with a part of the sealant 8 in the tire width direction. In the pasting step, the sealant 8 discharged from the discharge port 16a may be pressed against the inner surface 1a of the tire 1 using a pressing member such as a roller.

  When the sealant 8 is wound around the inner surface 1a of the tire 1 a predetermined number of times and is affixed in a spiral shape, the shutter of the discharge port 16a is closed, and the affixing process ends. At this time, the shutter of the discharge port 16a is closed at a predetermined timing so that the front end and the end of the sealant 8 attached to the inner surface 1a of the tire 1 are substantially in the same position in the tire circumferential direction. By disposing the front end and the end of the sealant 8 at the same position in the tire circumferential direction, the weight balance in the circumferential direction of the sealant layer 9, that is, the tire 1 can be increased.

  Even at the end of the pasting step, the discharge port 16a is located at a curved portion of the inner surface 1a of the tire 1. However, even at this pasting end position, the discharge port 16a is discharged in a cross-sectional view in the width direction of the tire 1 shown in FIG. The angle formed by the discharge direction of the outlet 16a with respect to the radial direction of the tire 1 is such that the discharge direction of the discharge port 16a when the sealant 8 is discharged to the center in the width direction of the inner surface 1a of the tire 1 is the radial direction of the tire 1. It is made larger than the angle formed. Thereby, the discharge direction of the discharge port 16a can be directed in a direction perpendicular to the inner surface 1a of the tire 1. Therefore, the end portion of the sealant 8 discharged from the discharge port 16 a is stuck perpendicularly to the curved inner surface 1 a at the outer side in the width direction of the tire 1, and the end of the sealant 8 hangs toward the center in the width direction of the tire 1. It can suppress falling.

  In the present embodiment, when the pasting process is completed and the discharge of the sealant 8 from the discharge port 16a is stopped, the drive motor 13 is operated for a predetermined time, that is, the tire 1 is rotated relative to the discharge port 16a. After being maintained, the drive motor 13 is stopped and the relative rotation of the tire 1 with respect to the discharge port 16a is stopped (rotation stop process). After stopping the discharge of the sealing agent 8 from the discharge port 16a, the rotation is stopped slowly after maintaining the relative rotation of the tire 1 with respect to the discharge port 16a for a predetermined time, so that it comes out slowly from the discharge port 16a. The end portion of the sealant 8 can be stretched and smoothed by the relative rotation of the discharge port 16a and the tire 1, and the lump generated at the end can be reduced.

  Moreover, in this Embodiment, at the time of completion | finish of a sticking process, the discharge port 16a is moved to the direction which gradually approaches the inner surface 1a of the tire 1 contrary to the time of the start of a sticking process, and the discharge port 16a and the tire 1 are made. While gradually decreasing the distance from the inner surface 1a, the discharge of the sealant 8 is stopped, that is, the pasting process is terminated. As a result, when the discharge of the sealant 8 is stopped, the end portion of the sealant 8 stretched between the discharge port 16a and the inner surface 1a of the tire 1 is securely attached to the inner surface 1a of the tire 1 without being interrupted. Can be attached. Note that the interval between the discharge port 16a and the inner surface 1a of the tire 1 is not limited to be gradually reduced, but may be gradually reduced to a predetermined interval or may be rapidly decreased to a predetermined interval.

  With such a configuration, the generation of lumps at the end of the sealant 8 is reduced, and the end portion of the sealant 8 is securely attached to the curved inner surface 1a of the tire 1, whereby the sealant 8, that is, the sealant layer. The weight balance in both the tire circumferential direction and the axial direction can be further increased.

  In the present embodiment, since the position and angle of the discharge port 16a can be freely changed by the robot 14, the thickness change in the width direction of the sealant 8 attached to the inner surface 1a of the tire 1 or the tire 1 can be changed. Balance adjustment and the like can be easily performed. Further, it is possible to easily cope with the tires 1 of different sizes by changing the teaching or program of the robot 14.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  For example, in the above-described embodiment, the movement of the discharge port 16a in the tire width direction and the movement and tilting in the tire radial direction are performed using an industrial robot, but are performed using other equipment or the like. You may do it.

  Further, the tire rotating device 11 is not limited to the structure having the upper and lower rollers 12, and any structure having a different structure can be used as long as the tire 1 can be rotated.

  Furthermore, in the above embodiment, the tire 1 is rotated relative to the discharge port 16a by rotating only the tire 1 without moving the nozzle 16 provided with the discharge port 16a. The nozzle 16 is moved in the circumferential direction with respect to the tire 1 in a fixed state, or the nozzle 16 is moved in the circumferential direction with respect to the tire 1 while rotating the tire 1, so that the discharge port 16 a is moved. Thus, the tire 1 may be relatively rotated.

1: Tire 1a: Inner surface 8: Sealant 15: Sealant supply device 16a: Discharge port

Claims (6)

A tire manufacturing method for manufacturing a tire having a sealant attached to an inner surface,
A rotation starting step of rotating the tire relative to the discharge port of the sealant;
After the rotation start step, the sealant is discharged from the discharge port while rotating the tire relative to the discharge port, and the inner surface of the tire is directed from one side to the other side in the width direction of the tire. And a sticking step of attaching the sealant in a spiral shape in the tire circumferential direction,
In the affixing step, the tire forms an angle formed by a discharge direction of the discharge port with respect to the tire radial direction when a sealant is discharged to a width direction outer side portion of the tire inner surface in a cross-sectional view of the tire in the width direction. The tire manufacturing method characterized by the discharge direction of the said discharge port when discharging sealing agent to the center part of the width direction of an inner surface being larger than the angle which it comprises with respect to the said tire radial direction.   The tire manufacturing method according to claim 1, wherein the sealant is attached while increasing a distance between the discharge port and the inner surface of the tire at the start of the attaching step.   The tire manufacturing method of Claim 1 or 2 which performs the rotation stop process which stops the relative rotation of the said tire with respect to the said discharge outlet after completion | finish of the said sticking process.   The tire manufacturing method as described in any one of Claims 1-3 which complete | finishes the said sticking process, reducing the space | interval of the said discharge outlet and the inner surface of the said tire.   The discharge pressure of the said sealing agent from the said discharge outlet at the time of the start of the said sticking process is made smaller than the discharge pressure of the said sealing agent from the said discharge outlet after the start of the said sticking process. The tire manufacturing method according to one item.   A tire manufactured by the tire manufacturing method according to any one of claims 1 to 5.

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