JP2022054912A - Rubber sheet manufacturing device - Google Patents

Abstract

To provide a rubber sheet manufacturing device that can suppress an adhesion of a rubber sheet wound around a reel.SOLUTION: A rubber sheet manufacturing device 4 comprises: cooling devices 8, 10 and 12 that cool a rubber sheet 2 while transporting the sheet; a reel 16 that winds the rubber sheet 2; a temperature sensor 18 that measures a winding temperature of the rubber sheet 2; and a control device 20 that controls a transfer speed of the cooling devices 8, 10 and 12 based on the winding temperature. The rubber sheet manufacturing device 4 further preferably comprises an extruder 6 for extruding and molding the rubber sheet 2 by using a rubber material. The control device 20 controls an extrusion speed of the extruder 6 based on the winding temperature.SELECTED DRAWING: Figure 1

Description

The present invention relates to a rubber sheet manufacturing apparatus.

In the method of manufacturing a tire, a long strip-shaped rubber sheet is used. This rubber sheet is cut to an appropriate length, and a piece of rubber sheet is cut out from the rubber sheet. This rubber sheet piece is combined with other rubber members to form a low cover (raw tire). This low cover is pressurized and heated. In this way, the tire is manufactured using the rubber sheet. An example base sheet of this rubber sheet is described in Patent Document 1.

Japanese Unexamined Patent Publication No. 2018-16023

Long strips of rubber sheets may need to be stored and transported. This rubber sheet can be easily stored and transported by winding it on a reel. The rubber sheet wound around the reel is unwound from the reel and used. The drawn rubber sheet is cut, and a rubber sheet piece is cut out from the rubber sheet.

This rubber sheet is made of unvulcanized rubber and has high adhesiveness. In a rubber sheet wound around a reel and laminated, adhesion is likely to occur at the contact portion of the rubber sheet. In particular, a high-temperature rubber sheet tends to cause adhesion. The rubber sheet that is in close contact does not easily come off when it is unwound from the reel. When such a rubber sheet is peeled off, the rubber sheet is liable to be deformed. The deformed rubber sheet impairs the shape accuracy of the obtained rubber sheet piece. Such a rubber sheet piece impairs the shape accuracy of the low cover. Tires obtained from such a low cover are prone to problems such as air-in and bare.

An object of the present invention is to provide a rubber sheet manufacturing apparatus capable of suppressing adhesion of a rubber sheet wound around a reel.

The rubber sheet manufacturing apparatus according to the present invention has a cooling device for cooling while transporting the rubber sheet, a reel for winding the rubber sheet, a temperature sensor for measuring the winding temperature of the rubber sheet, and the winding temperature. A control device for controlling the transport speed of the cooling device based on the above is provided.

Preferably, the rubber sheet manufacturing apparatus further comprises an extruder that extrudes the rubber sheet from the rubber material. The control device controls the extrusion speed of the extruder based on the take-up temperature.

Preferably, the outer peripheral surface of the reel comprises one or more plated surfaces and an unplated non-processed surface.

Preferably, the circumferential width of each of the treated surfaces is 30 mm or more.

Preferably, the plurality of treated surfaces are formed at equal intervals in the circumferential direction of the outer peripheral surface.

Preferably, the number of the processed surfaces in the circumferential direction of the outer peripheral surface is 4 or more and 12 or less.

Preferably, the processing surface extends at an angle with respect to the axial direction of the reel.

Preferably, the outer peripheral surface of the reel is a plated treated surface.

The other rubber sheet manufacturing apparatus according to the present invention includes an extruder that extrudes and forms a rubber sheet from a rubber material, a reel that winds the rubber sheet, a temperature sensor that measures the winding temperature of the rubber sheet, and the winding. A control device for controlling the extrusion speed of the extruder based on the taking temperature is provided.

The method for manufacturing a tire according to the present invention is as follows.
(B) The process of cooling while transporting the rubber sheet,
(C) The process of winding the rubber sheet on a reel.
(D) A step of obtaining a rubber sheet piece cut from the rubber sheet wound on the reel.
(E) A step of combining the rubber sheet piece with another rubber member to obtain a low cover, and (F) a step of pressurizing and heating the low cover are included.
In the step (C), the winding temperature of the rubber sheet is measured. In the step (B), the transport speed of the rubber sheet is adjusted based on the take-up temperature.

The method for manufacturing another tire according to the present invention is as follows.
(A) A process of extruding a rubber material to form a rubber sheet,
(C) The process of winding the rubber sheet on a reel.
(D) A step of obtaining a rubber sheet piece cut from the rubber sheet wound on the reel.
(E) A step of combining the rubber sheet piece with another rubber member to obtain a low cover, and (F) a step of pressurizing and heating the low cover are included.
In the step (C), the winding temperature of the rubber sheet is measured. In the step (A), the extrusion speed of the rubber material is adjusted based on the take-up temperature.

In this rubber sheet manufacturing apparatus, the winding temperature of the rubber sheet is measured. The manufacturing apparatus adjusts at least one of the transport speed and the extrusion speed of the rubber sheet based on the take-up temperature. This manufacturing device can more accurately control the temperature of the rubber sheet wound around the reel. As a result, it is possible to more accurately suppress the temperature of the wound rubber sheet from becoming high. The occurrence of adhesion of the rubber sheet wound on the reel is suppressed. Further, this tire manufacturing method can obtain the same effect as that of the rubber sheet manufacturing apparatus.

FIG. 1 is a conceptual diagram showing a rubber sheet manufacturing apparatus according to an embodiment of the present invention together with a rubber sheet. FIG. 2 is a perspective view of the reel of the manufacturing apparatus of FIG. FIG. 3 is a front view of the reel of FIG. FIG. 4 is a cross-sectional view taken along the line segment IV-IV of FIG.

Hereinafter, the present invention will be described in detail based on a preferred embodiment with reference to the drawings as appropriate.

FIG. 1 shows a rubber sheet 2 and a rubber sheet manufacturing apparatus 4. The manufacturing apparatus 4 includes an extruder 6, a first cooling device 8, a second cooling device 10, a third cooling device 12, a festival 14, a reel 16, a temperature sensor 18, and a control device 20. The manufacturing apparatus 4 further includes a first conveyor 22, a second conveyor 24, a third conveyor 26, a fourth conveyor 28, and a fifth conveyor 30, and further includes a plurality of guide rollers 32 (32A-32H).

In this manufacturing apparatus 4, the extruder 6, the first cooling device 8, the second cooling device 10, the third cooling device 12, the festival 14, and the reel 16 are stepped from upstream to downstream in the manufacturing process of the rubber sheet 2. They are arranged according to the order of.

The extruder 6 includes an extruder body 34 and a rolling roll 36. The extruder main body 34 includes a cylinder 34A, a screw 34B rotatably supported in the cylinder 34A, a drive device 34C for rotationally driving the screw 34B, and a hopper 34D opening in the cylinder 34A.

The rolling roll 36 is located downstream of the extruder body 34. The rolling roll 36 includes a pair of rolls 36A. Each roll 36A is rotatable about an axis parallel to each other. The pair of rolls 36A are arranged with a gap between them.

The hopper 34D of the extruder main body 34 has a function of guiding the charged rubber material to the cylinder 34A. The screw 34B has a function of feeding the rubber material in the cylinder 34A toward the discharge port of the cylinder 34A while kneading it by rotating and pushing it out from the discharge port. The extruder main body 34 has a function of extruding a molded body 38 from a rubber material. The rolling roll 36 has a function of rolling a molded body 38 with a pair of rolls 36A and rolling and molding a long strip-shaped rubber sheet 2 from the molded body 38. The extruder 6 has a function of forming a long strip-shaped rubber sheet 2 from a rubber material.

The extruder 6 does not have to be provided with the rolling roll 36. The extruder 6 may push out the strip-shaped rubber sheet 2 from the discharge port.

Although not shown, the first cooling device 8 includes a transport device for transporting the rubber sheet 2 and a cooling device for cooling the rubber sheet 2. This transfer device is not particularly limited, but is, for example, a belt conveyor. This cooling device is not particularly limited, but is, for example, a device that injects cooling water toward the rubber sheet 2. This cooling device may be a device including a cooling water tank through which the rubber sheet 2 is passed through the cooling water. Although not shown, the second cooling device 10 and the third cooling device 12 also include a transport device for transporting the rubber sheet 2 and a cooling device for cooling the rubber sheet 2, similar to the first cooling device 8. Although the manufacturing apparatus 4 is provided with three cooling devices, it may be provided with one cooling device, two cooling devices, or four or more cooling devices. good.

The festival 14 has a function of feeding out the rubber sheet 2 at a transport speed corresponding to the winding speed of the reel 16. The festival 14 has a function of storing the rubber sheet 2. The festival 14 adjusts the speed difference between the transport speed of the third cooling device 12 and the winding speed of the reel 16 by storing the rubber sheet 2.

The reel 16 has a function of winding the rubber sheet 2 into a wound body in which the long strip-shaped rubber sheet 2 is laminated. The rubber sheet 2 can be easily stored and easily transported by being wound around the reel 16.

The first conveyor 22 and the second conveyor 24 have a function of transporting the rubber sheet 2 from the extruder 6 toward the first cooling device 8. The third conveyor 26 has a function of transporting the rubber sheet 2 from the second cooling device 10 toward the third cooling device 12. The fourth conveyor 28 has a function of transporting the rubber sheet 2 from the third cooling device 12 toward the festival 14. The fifth conveyor 30 has a function of transporting the rubber sheet 2 from the festival 14 toward the reel 16. Each guide roller 32 (32A-32H) has a function of guiding the rubber sheet 2 to be conveyed.

The temperature sensor 18 is located between the reel 16 and the fifth conveyor 30. The temperature sensor 18 is arranged so as to measure the temperature of the rubber sheet 2 supplied by the fifth conveyor 30 to the reel 16. The temperature sensor 18 measures the winding temperature of the rubber sheet 2.

This take-up temperature is a temperature measured by the rubber sheet 2 supplied to the reel 16 from the device that supplies the rubber sheet 2 to the reel 16 or by the rubber sheet 2 being taken up by the reel 16. The fifth conveyor 30 here is an example, and may be any device that supplies the rubber sheet 2 to the reel 16. Further, the temperature sensor 18 may be arranged so as to measure the temperature of the rubber sheet 2 being wound on the reel 16.

The control device 20 has a function of receiving a signal of the winding temperature of the rubber sheet 2 from the temperature sensor 18. The control device 20 has a function of controlling the drive device 34C of the extruder 6. The control device 20 can control the rotation speed of the screw 30B of the extruder 6. The control device 20 can control the extrusion speed of the extruder 6. The control device 20 has a function of controlling the transfer speed of each of the first cooling device 8, the second cooling device 10, and the third cooling device 12. The control device 20 has the extrusion speed of the extruder 6 and the transfer speed of the first cooling device 8, the second cooling device 10, and the third cooling device 12 based on the winding temperature of the rubber sheet 2 received from the temperature sensor 18. It has a function to control and.

As shown in FIG. 2, the reel 16 includes a cylinder 40 around which the rubber sheet 2 is wound and a pair of collars 42 located at the axial ends of the cylinder 40. The pair of collars 42 extend outward in the radial direction of the tubular body 40.

As shown in FIG. 3, a plurality of plated treated surfaces 44 are formed on the outer peripheral surface 40A of the tubular body 40. The outer peripheral surface 16A of the reel 16 is composed of a plurality of processed surfaces 44 and an outer peripheral surface 40A as an unplated non-processed surface. Each processing surface 44 is formed with a predetermined width and extends inclined with respect to the axis of the reel 16.

The alternate long and short dash line L1 represents a straight line parallel to the axis of the reel 16 and passing on the outer peripheral surface 40A. The alternate long and short dash line L2 represents the center line of the processing surface 44. The double-headed arrow θ1 represents the inclination angle of the processing surface 44. The inclination angle θ1 is measured as an angle formed by the straight line L1 and the center line L2. In this reel 16, the processing surface 44 is inclined from one end to the other end in the axial direction of the reel 16 at an inclination angle θ1.

FIG. 4 shows a cross section perpendicular to the axis of the reel 16. As shown in FIG. 4, a plurality of processing surfaces 44 are formed at equal intervals in the circumferential direction of the outer peripheral surface 16A. The number of the treated surfaces 44 is 8, but this number is an example and is not particularly limited. The double-headed arrow W1 in FIG. 4 represents the circumferential width of the processing surface 44. The circumferential width W1 is measured in the circumferential direction of the outer peripheral surface 16A. In FIG. 4, for convenience of explanation, the processing surface 44 is drawn so as to project outward in the radial direction from the outer peripheral surface 40A of the tubular body 40, but the processing surface 44 and the outer peripheral surface 40A are drawn with the outer peripheral surface 40A having a smooth curved surface. The surface 16A is formed.

A method for manufacturing a tire according to the present invention will be described with reference to FIGS. 1 to 4.

The rubber material is charged into the hopper 34D of the extruder main body 34 of FIG. The rubber material is kneaded by the screw 34B in the cylinder 34A and sent toward the discharge port. The extruder body 34 extrudes the molded body 38 from the rubber material. The molded body 38 is rolled by a rolling roll 36, and a rubber sheet 2 is formed from the molded body 38 (STEP 1).

The rubber sheet 2 is conveyed to the first cooling device 8. The rubber sheet 2 is cooled while being conveyed by the first cooling device 8 (STEP 2-1). The rubber sheet 2 is conveyed to the second cooling device 10. The rubber sheet 2 is cooled while being conveyed by the second cooling device 10 (STEP 2-2). The rubber sheet 2 is conveyed to the third cooling device 12. The rubber sheet 2 is cooled while being conveyed by the third cooling device 12 (STEP2-3).

The rubber sheet 2 is transported to the festival 14. The transport speed of the rubber sheet 2 is adjusted by the festival 14. The rubber sheet 2 is temporarily stored by the festival 14 (STEP 3).

The rubber sheet 2 is supplied to the reel 16 by the fifth conveyor 30. The take-up temperature of the rubber sheet 2 is measured by the temperature sensor 18 between the fifth conveyor 30 and the reel 16. The rubber sheet 2 is wound around the reel 16 (STEP 4).

Although not shown, the rubber sheet 2 wound around the reel 16 is unwound from the reel 16. The drawn rubber sheet 2 is cut to a predetermined length, and a rubber sheet piece is cut out from the rubber sheet 2 (STEP 5). This rubber sheet piece is combined with another rubber member to form a low cover (STEP 6). This low cover is charged into a mold and pressurized and heated. In this way, the tire can be obtained from the low cover (STEP 7).

In this manufacturing apparatus 4, the temperature sensor 18 measures the winding temperature of the rubber sheet 2 in the step (STEP 4). The control device 20 adjusts the temperature of the rubber sheet 2 based on the take-up temperature. This manufacturing apparatus 4 is a reel as compared with the case where it is based on the temperature of the rubber sheet 2 between the extruder 6 and the first cooling device 8 and the temperature of the rubber sheet 2 between the third cooling device 12 and the festival 14. The temperature of the rubber sheet 2 wound around the 16 can be controlled more accurately. As a result, it is possible to more accurately prevent the rubber sheet 2 to be wound from becoming hot. By accurately controlling the temperature of the rubber sheet 2 to be wound, the occurrence of adhesion of the rubber sheet 2 can be suppressed, and the deformation of the obtained rubber sheet piece can be suppressed.

In the manufacturing apparatus 4, in the step (STEP 2), the transfer speeds of the first cooling device 8, the second cooling device 10, and the third cooling device 12 are controlled based on the take-up temperature. The cooling time is adjusted by controlling the transport speed. By adjusting the cooling time, the temperature can be adjusted to the inside of the rubber sheet 2 as compared with the case where the cooling temperature is lowered.

In this manufacturing apparatus 4, in the step (STEP 1), the extrusion speed of the extruder 6 is controlled based on the take-up temperature. In the manufacturing device 4, the control device 20 controls the drive device 34C of the extruder 6 to adjust the rotation speed of the screw 34B. By controlling the extrusion speed, the control device 20 suppresses heat generation of the rubber material to be kneaded. Thereby, the temperature can be adjusted to the inside of the obtained rubber sheet 2.

In this manufacturing apparatus 4, the extrusion speed of the extruder 6 and the transfer speed of the first cooling device 8, the second cooling device 10, and the third cooling device 12 are adjusted, but the present invention is not limited thereto. Only the extrusion speed of the extruder 6 may be adjusted, or only the transfer speed of the first cooling device 8, the second cooling device 10 and the third cooling device 12 may be adjusted.

The difference in transport speed between the devices caused by adjusting the extrusion speed and the transport speed can be adjusted by interposing a temporary storage device for the rubber sheet 2 such as the festoon 14.

Although not shown, the manufacturing device 4 may include a speed alarm device. In this case, the control device 20 transmits an alarm signal to the speed alarm device when the controlled extrusion speed or the transfer speed is lower than the preset lower limit value. When the speed alarm device receives the alarm signal, the operator is notified of the abnormal transport speed by the alarm sound or the alarm light. As a result, the operator can deal with the abnormality in the transport speed of the manufacturing apparatus 4.

A plated processing surface 44 is formed on the outer peripheral surface 16A of the reel 16. The plated treated surface 44 can maintain a low surface roughness for a long period of time and exhibit a rust preventive effect. The treated surface 44 suppresses the adhesion between the outer peripheral surface 16A and the rubber sheet 2. The treated surface 44 can easily peel off the rubber sheet 2 from the outer peripheral surface 16A. The outer peripheral surface 16A is composed of a plated processed surface 44 and an unplated outer peripheral surface 40A, but the entire outer peripheral surface 16A may be composed of the processed surface 44.

The treated surface 44 having a small surface roughness suppresses the adhesion between the outer peripheral surface 16A and the rubber sheet 2. From this viewpoint, the surface roughness of the treated surface 44 is preferably 1.0 Ra or less, more preferably 0.7 Ra or less, and particularly preferably 0.5 Ra or less. This surface roughness is measured based on JIS B 0601: 1994.

The treated surface 44 is harder than the outer peripheral surface 40A, which is a non-treated surface. The treated surface 44 can maintain its surface condition for a long period of time. From this point of view, the hardness of the treated surface 44 is preferably 800 Hv or more in Vickers hardness. This hardness is measured based on JIS Z2244: 2209. Further, from the viewpoint of hardness and rust preventive effect, hard chrome plating is preferable as the plating of the treated surface 44.

In this manufacturing apparatus 4, the outer peripheral surface 16A is composed of a plated processed surface 44 and an outer peripheral surface 40A as an unplated non-processed surface. By providing the processing surface 44 and the outer peripheral surface 40A, slippage between the outer peripheral surface 16A and the rubber sheet 2 is suppressed. Looseness of the rubber sheet 2 to be wound is suppressed. From this point of view, the outer peripheral surface 16A is preferably composed of one or more processed surfaces 44 and an outer peripheral surface 40A as a non-processed surface.

From the viewpoint of facilitating the rubber sheet 2 from peeling off from the outer peripheral surface 16A, the circumferential width W1 of each of the treated surfaces 44 is preferably 30 mm or more, more preferably 40 mm or more, and particularly preferably 50 mm or more.

On the other hand, from the viewpoint of suppressing loosening of the wound rubber sheet 2, the distance between the treated surfaces 44 is preferably 30 mm or more, more preferably 40 mm or more, and particularly preferably 50 mm or more.

From the viewpoint of making it easy for the rubber sheet 2 to be uniformly peeled off over the entire circumference of the outer peripheral surface 16A, it is preferable that the plurality of treated surfaces 44 are formed at equal intervals in the circumferential direction of the outer peripheral surface 16A.

From the viewpoint of making it easier for the rubber sheet 2 to be peeled off more uniformly over the entire circumference of the outer peripheral surface 16A, the number of treated surfaces 44 in the circumferential direction of the outer peripheral surface 16A is preferably 4 or more, more preferably 6 or more. be. On the other hand, the number of the treated surfaces 44 is preferably 12 or less, and more preferably 10 or less, from the viewpoint of suppressing loosening of the rubber sheet 2 by spacing the treated surfaces 44.

From the viewpoint of making it easier for the rubber sheet 2 to be peeled off more evenly over the entire circumference of the outer peripheral surface 16A, the processing surface 44 may extend so as to be inclined with respect to the axial direction of the reel 16 like this reel 16. preferable. The inclination angle θ1 is not particularly limited. However, when the inclination angle θ1 approaches 90 °, the material having a biased shape may be difficult to peel off. From this point of view, the inclination angle θ1 is preferably 60 ° or less. Further, when the inclination angle θ1 approaches 0 °, the flat-shaped material is difficult to peel off. From this point of view, the inclination angle θ1 is preferably 30 ° or more.

In this tire manufacturing method, the control device 20 adjusts the transfer speeds of the first cooling device 8, the second cooling device 10, and the third cooling device 12 based on the take-up temperature measured in the step (STEP 4). .. The control device 20 stores the allowable range of the take-up temperature. When the winding temperature of the rubber sheet 2 exceeds the allowable range, in the step (STEP 2), the control device 20 lowers the transfer speed of the first cooling device 8, the second cooling device 10, and the third cooling device 12. The control device 20 prolongs the cooling time of the rubber sheet 2. As a result, the temperature of the rubber sheet 2 is lowered.

In this tire manufacturing method, the temperature can be easily adjusted to the inside of the rubber sheet 2 by lengthening the cooling time. This manufacturing method is particularly suitable for adjusting the temperature of the thick rubber sheet 2. For example, the thickness of the rubber sheet piece, which is the tread member used for the tread and the sidewall member used for the sidewall, is thick. The thick rubber sheet piece is cut out from the thick rubber sheet 2. This manufacturing method is suitable for manufacturing a thick rubber sheet 2. From this point of view, this manufacturing method is suitable for manufacturing a rubber sheet 2 having a thickness of 5 mm or more.

In this tire manufacturing method, the control device 20 adjusts the extrusion speed of the extruder 6 based on the take-up temperature measured in the step (STEP 4). When the take-up temperature of the rubber sheet 2 exceeds the allowable range, the control device 20 reduces the extrusion speed of the extruder 6 in the step (STEP 1). The control device 20 controls the drive device 34C of the extruder 6 to reduce the rotation speed of the screw 34B. As a result, the temperature rise of the rubber material to be kneaded is suppressed.

In this manufacturing method, the temperature can be adjusted to the inside of the obtained rubber sheet 2 by adjusting the heat generation of the rubber material. This manufacturing method is particularly suitable for adjusting the temperature of the thick rubber sheet 2. This manufacturing method is suitable for manufacturing a rubber sheet 2 that can obtain a thick rubber sheet piece such as a tread member or a sidewall member, for example. From this point of view, this manufacturing method is suitable for manufacturing a rubber sheet 2 having a thickness of 5 mm or more.

Although not shown, the manufacturing apparatus 4 may include a sheet pasting apparatus. The sheet pasting device is arranged between the extruder 6 and the first cooling device 8. The sheet affixing device attaches a thin long strip-shaped film sheet to the surface of the rubber sheet 2. The material of the film sheet is not particularly limited, and polyethylene terephthalate (PET) is exemplified. By covering the surface of the rubber sheet 2 with the film sheet, adhesion of foreign matter can be prevented and adhesion of the rubber sheet 2 can be suppressed.

Even when the rubber sheet 2 is wound around the reel 16 together with the film sheet, the film sheet and the rubber sheet 2 may be in close contact with each other. When the film sheet is peeled off from the rubber sheet 2, the rubber sheet 2 may be deformed. In this manufacturing apparatus 4, the occurrence of adhesion of the rubber sheet 2 wound around the reel 16 is suppressed regardless of the presence or absence of the sheet pasting apparatus.

The method described above can be widely applied to a method for manufacturing a rubber sheet used for manufacturing a tire.

2 ... Rubber sheet 4 ... Rubber sheet manufacturing equipment 6 ... Extruder 8 ... First cooling device 10 ... Second cooling device 12 ... Third cooling device 16 ... Reel 16A・ ・ ・ Outer surface 18 ・ ・ ・ Temperature sensor 20 ・ ・ ・ Control device 40A ・ ・ ・ Outer surface (non-processed surface)
44 ... Processing surface

Claims (11)

A cooling device that cools the rubber sheet while transporting it,
The reel that winds up the rubber sheet and
A temperature sensor that measures the winding temperature of the rubber sheet, and
A rubber sheet manufacturing apparatus including a control device for controlling a transport speed of the cooling device based on the take-up temperature. Further equipped with an extruder for extruding the rubber sheet from a rubber material,
The rubber sheet manufacturing apparatus according to claim 1, wherein the control device controls the extrusion speed of the extruder based on the take-up temperature. The rubber sheet manufacturing apparatus according to claim 1 or 2, wherein the outer peripheral surface of the reel is composed of one or more processed surfaces plated and a non-processed surface not plated. The rubber sheet manufacturing apparatus according to claim 3, wherein each of the treated surfaces has a circumferential width of 30 mm or more. The rubber sheet manufacturing apparatus according to claim 3 or 4, wherein the plurality of treated surfaces are formed at equal intervals in the circumferential direction of the outer peripheral surface. The rubber sheet manufacturing apparatus according to claim 5, wherein the number of the processed surfaces in the circumferential direction of the outer peripheral surface is 4 or more and 12 or less. The rubber sheet manufacturing apparatus according to any one of claims 3 to 6, wherein the processing surface is inclined and extends with respect to the axial direction of the reel. The rubber sheet manufacturing apparatus according to claim 1 or 2, wherein the outer peripheral surface of the reel is a plated processing surface. An extruder that extrudes a rubber sheet from a rubber material and
The reel that winds up the rubber sheet and
A temperature sensor that measures the winding temperature of the rubber sheet, and
A rubber sheet manufacturing apparatus including a control device for controlling the extrusion speed of the extruder based on the take-up temperature. (B) The process of cooling while transporting the rubber sheet,
(C) The process of winding the rubber sheet on a reel.
(D) A step of obtaining a rubber sheet piece cut from the rubber sheet wound on the reel.
(E) A step of combining the rubber sheet piece with another rubber member to obtain a low cover, and (F) a step of pressurizing and heating the low cover are included.
In the step (C), the winding temperature of the rubber sheet was measured, and the result was determined.
A method for manufacturing a tire, wherein in the step (B), the transport speed of the rubber sheet is adjusted based on the take-up temperature. (A) A process of extruding a rubber material to form a rubber sheet,
(C) The process of winding the rubber sheet on a reel.
(D) A step of obtaining a rubber sheet piece cut from the rubber sheet wound on the reel.
(E) A step of combining the rubber sheet piece with another rubber member to obtain a low cover, and (F) a step of pressurizing and heating the low cover are included.
In the step (C), the winding temperature of the rubber sheet was measured, and the result was determined.
A method for manufacturing a tire, wherein in the step (A), the extrusion speed of the rubber material is adjusted based on the take-up temperature.

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