JP7368226B2 - Method for holding extruded rubber members and manufacturing method for pneumatic tires - Google Patents

Description

The present invention relates to a method for holding an extruded rubber member and a method for manufacturing a pneumatic tire.

Patent Document 1 discloses a band-like member manufacturing device that extrudes a rubber material into a predetermined cross-sectional shape from an extruder to form a long rubber member, and winds and holds the extruded rubber member around the outer periphery of a roll. is disclosed.

In an extruder, the rubber material is kneaded with a compounding agent by a screw or the like, and the temperature increases as the kneading occurs. The heated rubber material is extruded from the die into an extruded rubber member having a predetermined cross-sectional shape. After being wound around the outer periphery of the roll, the extruded rubber member is held until the temperature drops to a predetermined temperature.

JP2011-25445A

The extruded rubber member wound up on a roll is likely to be pulled downward due to its own weight acting on the upper portion of the roll, and its thickness is likely to decrease. In particular, when the temperature is high and deformation is likely to occur, the thickness of the extruded rubber member wound around the roll tends to decrease significantly in the portion located above the roll. As a result, the extruded rubber member fed out from the roll tends to have an uneven thickness.

An object of the present invention is to provide a method for holding an extruded rubber member that can make the thickness of the extruded rubber member wound around a roll uniform in the circumferential direction.

The present invention
Extrude the kneaded rubber material into a predetermined cross-sectional shape to form a long extruded rubber member,
A method for holding an extruded rubber member, the method comprising: winding and holding the extruded rubber member around the outer periphery of a roll,
rotating the roll holding the extruded rubber member by a predetermined rotation angle using a winding device that winds up the extruded rubber member ;
Holding the extruded rubber member, wherein the extruded rubber member is wound up while laminating film members that are paid out as the roll rotates, and the final rotational angular position of the roll changes by 360 degrees or less. provide a method.

According to the present invention, the part of the extruded rubber member wound up on the roll, which is located at the upper part of the roll and whose thickness tends to decrease as it is pulled downward by its own weight, changes as the roll rotates. As a result, the portion of the extruded rubber member located above the roll changes in the circumferential direction, so that it is possible to suppress the reduction in thickness from concentrating on a specific portion. Therefore, the thickness of the extruded rubber member wound around the roll can be easily made uniform in the circumferential direction.
Moreover, it is easy to suppress an increase in the amount of film members used to be wound up as the rolls rotate.

The rotation of the roll may be performed until the temperature of the extruded rubber member falls below a predetermined temperature.

According to this configuration, since the roll is rotated when the temperature is relatively high, where deformation of the extruded rubber member is likely to occur, it is easy to uniformize the thickness of the extruded rubber member efficiently. In other words, it is possible to suppress the rotation of the roll when the temperature is relatively low, when the thickness is less likely to decrease, resulting in energy savings.

The rotation of the roll may be performed such that the upper and lower parts of the roll are interchanged.

According to this configuration, among the extruded rubber members wound up on the roll, by replacing the part located at the top of the roll where the thickness reduction is most likely to occur and the part located at the bottom of the roll where the thickness reduction is least likely to occur, It is easier to uniformize the thickness of the extruded rubber member more efficiently.

The rotation of the roll may be performed multiple times such that the total rotation angle is 360 degrees or more.

According to this configuration, of the extruded rubber member wound up on the roll, the portions where the thickness is likely to decrease can be dispersed at a plurality of locations in the circumferential direction. Therefore, it is easier to uniformize the thickness of the extruded rubber member more efficiently.

The rotation of the roll may be performed on one side and the other side in the circumferential direction.

According to this configuration, by switching the rotation direction of the roll, it is easy to increase the total amount of change in the rotation angle of the roll while suppressing a change in the rotation angle position. As a result, when the extruded rubber member is wound together with the film member, it is easy to increase the amount of change in the rotation angle of the roll while suppressing an increase in the amount of film member used.

The rotation of the roll may be performed periodically.

According to this configuration, by periodically rotating the roll, the extruded rubber member wound around the roll is prevented from being held at a specific rotation angle position for a long time. This prevents a specific portion of the extruded rubber member wound onto the roll from being located above the roll for a long period of time, making it easier to prevent thickness reduction from concentrating on a specific portion. Therefore, the thickness of the extruded rubber member wound around the roll can be easily made uniform.

The rotational speed at which the roll is rotated may be set to a speed at which the rotating roll does not idle relative to the extruded rubber member wound thereon.

According to this configuration, since the roll is prevented from idling with respect to the extruded rubber member wound here, there is no friction between the extruded rubber member and the roll, and there is no change in the surface properties of the extruded rubber member (for example, a decrease in tack). ) can be suppressed.

According to another aspect of the present invention, there is provided a method for manufacturing a pneumatic tire, which comprises manufacturing a pneumatic tire using the extruded rubber member held by the extruded rubber member holding method described above.

According to the present invention, a pneumatic tire with excellent uniformity can be obtained by manufacturing a pneumatic tire using an extruded rubber member having a uniform thickness. In addition, by using an extruded rubber member held by the extruded rubber member holding method described above in the tread portion, the thickness of the tread portion can be easily made uniform over the tire circumferential direction, and the ground contact length in the tire circumferential direction can be adjusted in the tire circumferential direction. It is easy to make it uniform. Thereby, steering stability, ride comfort, and braking performance can be improved.

According to the present invention, the thickness of the extruded rubber member wound around the roll can be made uniform over the circumferential direction.

A process diagram showing a method for manufacturing a pneumatic tire. 1 is a schematic diagram showing a forming line of an extruded rubber member according to an embodiment of the present invention. FIG. 3 is a diagram showing a winding device that winds up an extruded rubber member. FIG. 4 is a front view of the take-up roll and film roll as viewed from arrow A in FIG. 3; FIG. 3 is a side view showing the extruded rubber member taken up on a take-up roll. FIG. 6 is a side view showing a state in which the take-up roll is rotated 180 degrees in the normal direction from the state in FIG. 5; FIG. 7 is a side view showing a state in which the take-up roll is further rotated 90 degrees in the normal direction from the state in FIG. 6; FIG. 8 is a side view showing a state where the take-up roll is reversed by 180 degrees from the state shown in FIG. 7; FIG. 9 is a side view showing a state in which the take-up roll is further reversed by 90 degrees from the state in FIG. 8; FIG. 7 is a side view showing a take-up roll truck according to a modified example.

Embodiments of the present invention will be described below with reference to the accompanying drawings. Note that the following description is essentially just an example, and is not intended to limit the present invention, its applications, or its uses.

FIG. 1 is a process diagram schematically showing a method for manufacturing a pneumatic tire. Tire constituent members such as tread rubber, sidewall rubber, carcass ply, inner liner, and belt formed in tire constituent member forming step 1 are assembled on a molding drum in green tire forming step 2 to form a green tire. Ru. Next, the green tire is vulcanized in a tire vulcanization mold in a tire vulcanization step 3 to produce a pneumatic tire.

Below, as tire component forming step 1, a step of forming an extruded rubber member formed by extruding tread rubber, sidewall rubber, inner liner, etc. will be described. FIG. 2 is a layout diagram showing a forming line 5 for forming an extruded rubber member. As shown in FIG. 2, the extruded rubber member 50 having a predetermined cross-sectional shape extruded from the extruder 10 passes through the cooling tank 7 and is then wound around the winding roll 32 in the winding device 20.

The extruder 10 includes a hopper 11 into which the rubber material R is charged, a screw 12 which kneads and conveys the rubber material R fed into the hopper 11, and a drive source 13 (for example, a motor) that drives the screw 12. ing. The extruder 10 rotates the screw 12 by driving the drive source 13 to knead and heat the rubber material R, and extrude the rubber material R from the extruder 10. The extruded rubber material R forms an extruded rubber member 50 in the form of a long strip having a predetermined cross-sectional shape (for example, trapezoidal shape). The extruded rubber member 50 is transported by a transport means 8 such as a conveyor, and reaches the winding device 20 via the cooling tank 7.

FIG. 3 is a diagram showing a schematic configuration of the winding device 20. As shown in FIG. As shown in FIG. 3, the winding device 20 includes a winding roll truck 30, a first roll drive section 21, and a second roll drive section 22. In the following description, the upstream and downstream sides (the right side and the left side in FIG. 3) of the extruded rubber member 50 in the conveying direction are referred to as the front side and the rear side of the winding device 20, and the up and down direction in FIG. 3 is referred to as the winding device 20. The direction perpendicular to the longitudinal direction and the vertical direction is called the horizontal direction of the winding device 20.

The take-up roll truck 30 includes a main body frame 31 , a take-up roll 32 for winding up the extruded rubber member 50 , a film roll 33 around which the film member F is wound, and an idler roller 34 . The main body frame 31 includes a front pillar part 31a extending upward at the front end of the take-up roll truck 30, and a first inclined part 31b connected to the upper end part of the front pillar part 31a and extending rearward in an upwardly inclined direction. and a second inclined part 31c that is connected to the rear end of the first inclined part 31b and extends in a downwardly inclined direction towards the rear.

A film roll 33 is rotatably supported on the lower rear end surface of the front column portion 31a via a first bearing 35 about an axis extending in the left-right direction. An idler roller 34 is rotatably supported on the upper surface of the first inclined portion 31b via a second bearing 36 about an axis extending in the left-right direction. A take-up roll 32 is rotatably supported on the upper surface of the second inclined portion 31c via a third bearing 37 about an axis extending in the left-right direction.

FIG. 4 is a rear view of the take-up roll 32 and the film roll 33, taken in the direction of arrow A in FIG. 3. As shown in FIG. 4, the take-up roll 32 includes a cylindrical roll body 32a and a pair of disc-shaped flanges 32b fixed to both left and right sides of the roll body 32a. The outer diameter of the flange 32b is larger than the outer diameter of the roll body 32a. The extruded rubber member 50 is wound around the outer periphery of the roll body 32a while its position in the left and right direction is regulated by the pair of flanges 32b.

Similarly, the film roll 33 has a cylindrical roll body 33a and a pair of disc-shaped flanges 33b fixed to both left and right sides of the roll body 33a. The outer diameter of the flange 33b is larger than the outer diameter of the roll body 33a. The film member F is wound around the outer periphery of the roll body 33a between the pair of flanges 33b.

Returning to FIG. 3, the first roll drive unit 21 is configured to rotate the take-up roll 32 by a predetermined rotation angle. The first roll drive section 21 includes a first drive motor 21a and a first drive roller 21c driven by the first drive motor 21a via a first belt 21b. The first drive motor 21a is configured to be able to rotate by a predetermined rotation angle, and may be a stepping motor, for example. The first drive roller 21c is in contact with the outer peripheral portion of one of the pair of flanges 32b of the take-up roll 32.

The first roll drive unit 21 rotates the first drive roller 21c by rotating the first drive motor 21a, and rotates the flange 32b in contact with the first drive roller 21c, thereby rotating the take-up roll 32. Rotate.

Similarly, the second roll drive unit 22 is configured to rotate the film roll 33 by a predetermined rotation angle. The second roll drive section 22 includes a second drive motor 22a and a second drive roller 22c driven by the second drive motor 22a via a second belt 22b. The second drive motor 22a is configured to be able to rotate by a predetermined rotation angle, and can be, for example, a stepping motor. The second drive roller 22c is in contact with the outer peripheral portion of one of the pair of flanges 33b of the film roll 33.

The second roll drive section 22 rotates the film roll 33 by rotating the second drive roller 22c by rotating the second drive motor 22a and rotating the flange 33b that is in contact with the second drive roller 22c. let

In the winding device 20, the extruded rubber member 50 conveyed from the cooling tank 7 is wound around the outer peripheral part of the roll main body 32a of the winding roll 32 via the outer peripheral part of the idler roller 34. At this time, the film member F is let out from the film roll 33, is laminated on the outer surface side of the extruded rubber member 50, and is taken up on the take-up roll 32. The film member F prevents the inner circumferentially wound portion of the extruded rubber member 50 wound around the winding roll 32 and the outer circumferentially wound portion from coming into contact with each other. There is.

Specifically, in FIG. 3, the first drive motor 21a is rotated counterclockwise to rotate the take-up roll 32 clockwise, and the second drive motor 22a is rotated clockwise to rotate the film roll. Rotate 33 counterclockwise. At this time, the first drive motor 21a and the second drive motor are operated so that the amount of rotation by the take-up roll 32 and the amount of rotation by the film roll 33 are equal to the amount of conveyance of the extruded rubber member 50 conveyed from the cooling tank 7. The amount of rotation of 22a is set respectively.

FIG. 5 shows a state in which one lot of extruded rubber members 50 (for example, a length corresponding to the tread rubber of 20 pneumatic tires) is wound around the winding roll 32. In FIG. 5, the first drive roller 21c and the second drive roller 22c are shown together by imaginary lines. Further, after one lot of extruded rubber member 50 is wound up, the film member F is further wound around the outer circumferential portion several times.

Here, in the following explanation, of the extruded rubber member 50 wound up on the winding roll 32, the end portion of the winding is referred to as the first portion 51, and the portion changed clockwise by 90 degrees from there is referred to as the second portion 52, A portion further changed by 90 degrees clockwise is a third portion 53, and a portion further changed 90 degrees clockwise is a fourth portion 54. In the state shown in FIG. 5, the rotation angle position of the take-up roll 32 is adjusted so that the first portion 51 is located at the upper end. Hereinafter, a method for holding an extruded rubber member according to this embodiment will be explained.

The extruded rubber member 50 wound around the winding roll 32 is held in the state wound around the winding roll 32 until the temperature drops below a predetermined temperature (for example, 35 degrees), and this process is called an aging process. to be called. FIG. 5 shows an initial state in which the extruded rubber member 50 is wound up on the take-up roll 32. After the aging process, the extruded rubber member 50 is supplied to the green tire forming process 2 (see FIG. 1).

In the initial state shown in FIG. 5, the weight of the remaining portion acts on the first portion 51 of the extruded rubber member 50 located above the take-up roll 32, so it is pulled to both sides in the circumferential direction and its thickness is reduced. Cheap. Further, the weight of the extruded rubber member 50 wound a plurality of times on the outer diameter side acts on the winding start portion 51a located on the radially inner side of the first portion 51, and the weight and roll body 32a The thickness is particularly likely to decrease because it is sandwiched between the two.

On the other hand, the third portion 53 of the extruded rubber member 50 located at the lower end of the take-up roll 32 is not subjected to the gravity of the remaining portion and is not pulled to both sides in the circumferential direction, so the thickness is reduced. Hateful. Further, of the extruded rubber member 50 wound up on the take-up roll 32, the weight of the portion located below acts on the second part 52 and the fourth part 54 located on both the front and back sides of the take-up roll 32. However, since this weight is smaller than the weight acting on the first portion 51 and the second and fourth portions are not pulled on both sides in the circumferential direction, the thickness is less likely to decrease as much as the first portion 51.

In this embodiment, the take-up roll 32 is rotated by a predetermined rotation angle during the aging process where the temperature of the extruded rubber member 50 is high and deformation is likely to occur due to the temperature. This prevents the portions where the thickness is likely to decrease from concentrating on a specific portion, that is, the first portion 51. The rotation angle of the take-up roll 32 is changed periodically, for example once every 10 minutes.

For example, as shown in FIG. 6, by rotating the first drive roller 21c counterclockwise and rotating the second drive roller 22c clockwise, as shown by the arrow "rotation 1" in the figure, , the take-up roll 32 is rotated 180 degrees clockwise (normal rotation). At this time, the film member F is further unwound and wound around the take-up roll 32 by 180 degrees.

As a result, the first portion 51 is located at the lower end of the take-up roll 32, and the third portion 53 is located at the upper end of the take-up roll 32. That is, the upper and lower parts of the extruded rubber member 50 wound around the winding roll 32 are replaced. Therefore, the portion where the thickness tends to become thinner is replaced by the third portion 53 from the first portion 51 .

Further, as shown in FIG. 7, by rotating the first drive roller 21c counterclockwise and rotating the second drive roller 22c clockwise, the rotation speed is increased as shown by the arrow "rotation 2" in the figure. , the take-up roll 32 is further rotated 90 degrees clockwise (forward rotation). At this time, the film member F is further unwound and wound around the take-up roll 32 by 90 degrees.

As a result, the second portion 52 is located at the upper end of the take-up roll 32, and the fourth portion 54 is located at the lower end of the take-up roll 32. Therefore, the portion where the thickness tends to become thinner is replaced by the second portion 52 from the third portion 53.

Furthermore, as shown in FIG. 8, by rotating the first drive roller 21c clockwise and rotating the second drive roller 22c counterclockwise, the rotation is performed as shown by the arrow "rotation 3" in the figure. , the take-up roll 32 is rotated 180 degrees counterclockwise (reversely). At this time, the film member F is let out by 180 degrees from the take-up roll 32 and taken up onto the film roll 33.

As a result, the fourth portion 54 is located at the upper end of the take-up roll 32, and the second portion 52 is located at the lower end of the take-up roll 32. That is, the portion where the thickness tends to become thinner is replaced by the fourth portion 54 from the second portion 52 .

Furthermore, as shown in FIG. 9, the first drive roller 21c is rotated clockwise and the second drive roller 22c is rotated counterclockwise, as shown by the arrow "Rotation 4" in the figure. Then, the take-up roll 32 is rotated 90 degrees counterclockwise (reversely). At this time, the film member F is let out by 90 degrees from the take-up roll 32 and taken up onto the film roll 33.

As a result, the first portion 51 is located at the upper end of the take-up roll 32, and the third portion 53 is located at the lower end of the take-up roll 32. That is, the extruded rubber member 50 returns to the initial state where it was wound up on the take-up roll 32.

Therefore, by rotating the take-up roll 32 by a predetermined rotation angle as shown in FIGS. 6 to 9 from the initial state shown in FIG. , a second portion 52, and a fourth portion 54. Thereby, the portions where the thickness tends to become thinner can be prevented from concentrating on a specific portion, and can be dispersed at a plurality of locations in the circumferential direction. Thereafter, the take-up roll 32 may be periodically rotated to each rotational position shown in FIGS. 6 to 9. For example, the rotational position may be changed every 10 minutes.

Further, the rotational speed of the take-up roll 32 in the aging process is set at a speed that does not cause the extruded rubber member 50 wound around the take-up roll 32 to idle. For example, the rotational speed of the take-up roll 32 is set such that the circumferential speed at the outer peripheral portion of the roll body 32a is 10 m/min or less.

According to the above-described method of holding an extruded rubber member, the following effects can be obtained.

(1) Of the extruded rubber member 50 wound up on the take-up roll 32, the portion located at the upper part of the take-up roll 32 and easily pulled downward by its own weight and reduced in thickness is removed from the take-up roll 32. Changes with rotation. As a result, the portion of the extruded rubber member 50 located above the take-up roll 32 changes in the circumferential direction, so that it is possible to suppress the reduction in thickness from concentrating on a specific portion. Therefore, the thickness of the extruded rubber member 50 wound around the winding roll 32 can be easily made uniform in the circumferential direction.

(2) The take-up roll 32 is rotated by a predetermined angle during the aging process. As a result, since the take-up roll 32 is rotated when the temperature is relatively high, where deformation of the extruded rubber member 50 is likely to occur, it is easy to uniformize the thickness of the extruded rubber member 50 efficiently. In other words, it is possible to suppress the rotation of the take-up roll 32 when the temperature is relatively low, when a decrease in thickness is less likely to occur, resulting in energy savings.

(3) The take-up roll 32 is rotated so that the upper and lower parts of the take-up roll 32 are interchanged. As a result, of the extruded rubber member 50 wound up on the take-up roll 32, the part located at the upper part of the take-up roll 32 (for example, the first part 51) where the thickness reduction is most likely to occur, and the part where the thickness reduction is least likely to occur. By replacing the lower part (for example, the third part) of the winding roll 32, it is easier to uniformize the thickness of the extruded rubber member 50 more efficiently.

(4) The take-up roll 32 is rotated multiple times so that the total rotation angle is 360 degrees or more. As a result, of the extruded rubber member 50 wound up on the take-up roll 32, the portions where the thickness is likely to decrease can be dispersed at a plurality of locations in the circumferential direction. Therefore, it is easier to uniformize the thickness of the extruded rubber member 50 more efficiently.

(5) The extruded rubber member 50 is wound while laminating the film member F that is fed out as the winding roll 32 rotates, and the final change in the rotation angle position of the winding roll 32 is 360 degrees or less. It is. As a result, it is easy to suppress an increase in the usage amount of the film member F that is wound up as the take-up roll 32 rotates.

(6) When the take-up roll 32 is rotated multiple times, it is rotated in a combination of normal rotation and reverse rotation. As a result, by switching the rotation direction of the take-up roll 32, it is easy to increase the total amount of change in the rotation angle of the take-up roll 32 while suppressing changes in the rotation angle position. As a result, when the extruded rubber member 50 is wound together with the film member F, it is easy to increase the amount of change in the rotation angle of the take-up roll 32 while suppressing an increase in the amount of the film member F used.

(7) In the aging process, by periodically rotating the winding roll 32, the extruded rubber member 50 wound around the winding roll 32 is prevented from being held at a specific rotation angle position for a long time. This prevents a specific portion of the extruded rubber member 50 wound up on the take-up roll 32 from being located above the take-up roll 32 for a long period of time, so that the thickness decrease is concentrated in the particular portion. It's easy to refrain from doing things. Therefore, the thickness of the extruded rubber member 50 wound around the winding roll 32 can be easily made uniform.

(8) The rotation speed at which the take-up roll 32 is rotated is set to a speed at which the rotating take-up roll 32 does not idle relative to the extruded rubber member 50 wound thereon. As a result, the take-up roll 32 is prevented from idling with respect to the extruded rubber member 50 wound here, so there is no friction between the extruded rubber member 50 and the take-up roll 32, and the surface texture of the extruded rubber member 50 is improved. changes (for example, a decrease in tack) can be suppressed.

(9) A pneumatic tire is manufactured using the extruded rubber member 50 held by the above method. By manufacturing a pneumatic tire using the extruded rubber member 50 having a uniform thickness, a pneumatic tire with excellent uniformity can be obtained. In addition, by using tread rubber as the extruded rubber member 50 held by the above extruded rubber member holding method in the tread portion, the thickness of the tread portion can be easily made uniform over the tire circumferential direction, and the ground contact length in the tire circumferential direction can be easily made uniform. can be easily made uniform in the tire circumferential direction. Thereby, steering stability, ride comfort, and braking performance can be improved.

In the embodiment described above, the first roll drive section 21 and the second roll drive section 22 provided in the winding device 20 are used to rotate the take-up roll 32 and the film roll 33, but the present invention is not limited thereto. For example, the take-up roll truck 30 may be taken out from the take-up device 20 and the take-up roll 32 and film roll 33 may be rotationally driven by another device. Further, as shown in FIG. 10, the take-up roll cart 30 itself is provided with a first roll drive section 210 and a second roll drive section 220 so as to directly drive the take-up roll 32 and the film roll 33 to rotate. You can also do this.

Further, in the above embodiment, the take-up roll 32 is periodically rotated in the aging process, but it may be rotated randomly. For example, when the temperature of the extruded rubber member 50 wound around the winding roll 32 is relatively high, the rotation angle may be changed at relatively short intervals, and the temperature of the extruded rubber member 50 decreases. As the rotation angle increases, the interval at which the rotation angle is changed may be lengthened. As a result, when the temperature is high and it is relatively easy to deform, it is prevented from being held at one rotation angle position for a long time, and when the temperature is low and it is relatively difficult to deform, it is prevented from being rotated unnecessarily. Prevented. In addition, the take-up roll 32 may be rotated continuously.

Furthermore, in the above embodiment, the winding end position of the extruded rubber member 50 is assumed to be the first portion 51, and the first portion 51 is located above the winding roll 32 in the initial state. The present invention is not limited to this, and the winding end position of the extruded rubber member 50 may be located at an arbitrary angular position. Further, in the above embodiment, the angular position is changed between angular positions defined every 90 degrees, but the angular position is not limited to this, and may be changed between arbitrary angular positions. Further, in the above embodiment, the explanation is given using tread rubber as an example, but the present invention is not limited to this, and can be suitably applied to other extruded rubber members such as sidewalls and inner liners.

Note that the present invention is not limited to the configuration described in the above embodiments, and various changes are possible.

10 Extruder 20 Winding device 21 First roll drive section 21c First drive roller 22 Second roll drive section 22c Second drive roller 30 Winding roll truck 32 Winding roll 32a Roll body 32b Flange 33 Film roll 33a Roll body 33b Flange 50 Extruded rubber member 51-54 1st-4th portion F Film member

Claims (8)

Extrude the kneaded rubber material into a predetermined cross-sectional shape to form a long extruded rubber member,
A method for holding an extruded rubber member, the method comprising: winding and holding the extruded rubber member around the outer periphery of a roll,
rotating the roll holding the extruded rubber member by a predetermined rotation angle using a winding device that winds up the extruded rubber member ;
Holding the extruded rubber member, wherein the extruded rubber member is wound up while laminating film members that are paid out as the roll rotates, and the final rotational angular position of the roll changes by 360 degrees or less. Method. Carrying out the rotation of the roll until the temperature of the extruded rubber member falls below a predetermined temperature;
A method for holding an extruded rubber member according to claim 1. carrying out the rotation of the roll such that the upper and lower parts of the roll are interchanged;
A method for holding an extruded rubber member according to claim 1 or 2. Carrying out the rotation of the roll multiple times so that the total rotation angle is 360 degrees or more,
A method for holding an extruded rubber member according to any one of claims 1 to 3. carrying out the rotation of the roll on one side and the other side in the circumferential direction;
A method for holding an extruded rubber member according to any one of claims 1 to 4 . carrying out the rotation of the roll periodically;
A method for holding an extruded rubber member according to any one of claims 1 to 5 . The rotational speed at which the roll is rotated is set to a speed at which the rotating roll does not idle relative to the extruded rubber member wound thereon.
A method for holding an extruded rubber member according to any one of claims 1 to 6 . A method for manufacturing a pneumatic tire, comprising manufacturing a pneumatic tire using the extruded rubber member held by the extruded rubber member holding method according to any one of claims 1 to 7 .

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