JP3814349B2 - Belt manufacturing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a belt in which an elastomer layer is disposed on both sides of a belt of a core member, such as a flat belt, a V belt, a cogged belt, and a toothed belt, and particularly relates to a measure for equalizing the belt thickness. .
[0002]
[Prior art]
In general, a belt in which rubber layers are integrally provided on both sides of a belt of a core member is known. As a conventional manufacturing method of such a belt, first, an unvulcanized rubber sheet is wound on a cylindrical mold to provide an unvulcanized lower rubber layer, and a core member is wound thereon, and further, An unvulcanized rubber sheet is wound around the upper rubber layer to provide an unvulcanized upper rubber layer. Next, a cylindrical slab having the unvulcanized lower rubber layer, the core member, and the unvulcanized upper rubber layer is pressure vulcanized.
[0003]
Specifically, as shown in FIG. 8, a first molding step a for providing an unvulcanized lower rubber layer, a first pressing step b for pressurizing the lower rubber layer, and a core on the lower rubber layer A second molding step c for providing an unvulcanized upper rubber layer via a body member, a second pressure step d for pressurizing the upper rubber layer, and a vulcanization step e for vulcanizing the rubber layer. . That is, in the first molding step a, an unvulcanized lower rubber layer is provided by winding an unvulcanized rubber sheet a predetermined number of times (for example, three times) around the circumferential surface of the cylindrical mold. In the second molding step c, after the core member is wound on the lower rubber layer, an unvulcanized rubber sheet is wound on the unvulcanized rubber sheet a predetermined number of times (for example, three times). Provide a layer.
[0004]
[Problems to be solved by the invention]
By the way, the thickness of the rubber sheet varies. Therefore, when such a rubber sheet is wound several times to provide a rubber layer, the variation in the thickness of the belt increases accordingly. In addition, if there is a variation in the thickness of the rubber layers between both sides of the belt, the core body may be displaced in the belt thickness direction, which may cause a variation in the pitch height. These are in an unsuitable state for the recent demand for high accuracy belts, but it is difficult to eliminate variations in the thickness of the rubber sheet itself. Is required.
[0005]
The present invention has been made in view of such a point, and its main object is to provide an elastomer layer when manufacturing a belt in which an elastomer layer such as a rubber layer is disposed on both sides of the belt of the core member. Even if there is some variation in the thickness accuracy of the elastomer sheet to be formed, the thickness accuracy of the belt can be improved without reducing the variation in the thickness of the sheet itself.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, an elastomer sheet is wound and an unvulcanized elastomer layer is provided, and then the surface of the elastomer layer is cut so that the thickness of the elastomer layer is a predetermined thickness. To be uniform.
[0007]
Specifically, according to the first aspect of the present invention, the core body member extending in the belt length direction, the lower elastomer layer disposed on the belt inner surface side of the core body member, and the belt rear surface side of the core body member are disposed. And a method of manufacturing a belt having an elastomer layer.
[0008]
Then, a first molding step in which an unvulcanized elastomer sheet is wound around the peripheral surface of the cylindrical mold to provide an unvulcanized lower elastomer layer, a first pressurizing step in which the lower elastomer layer is pressurized, and the first A first cutting step of cutting the surface of the lower elastomer layer so that the thickness of the lower elastomer layer pressed in the pressing step is uniformed to a predetermined thickness, and the surface is cut in the first cutting step. A second molding step in which a core member is wound on the lower elastomer layer, and then an unvulcanized elastomer sheet is wound on the core member to provide an unvulcanized upper elastomer layer, and the upper elastomer layer And a second cutting step for cutting the surface of the upper elastomer layer so that the thickness of the upper elastomer layer pressed in the second pressing step is uniformized to a predetermined thickness. Process and lower unvulcanized elastomer Over layer, so that and a press vulcanization step of the tubular slab press vulcanization comprising a elastomeric layer over the tension member members and unvulcanized. That is, the process of cutting the surface of each elastomer layer is performed when shifting from the first pressure process to the second molding process and from the second pressure process to the pressure vulcanization process.
[0009]
In the above configuration, in the first molding step, an unvulcanized lower elastomer sheet is wound around the peripheral surface of the cylindrical mold a predetermined number of times to provide an unvulcanized lower elastomer layer, and then the first pressurizing step. Then, the elastomer layer is pressurized in order to transfer the shape of the peripheral surface of the mold to the lower elastomer layer. Next, in the first cutting step, the surface of the lower elastomer layer is cut, whereby the thickness of the lower elastomer layer is made uniform to a predetermined thickness and the variation in thickness is cancelled.
[0010]
In the second molding step, after the core member is wound on the lower elastomer layer, an unvulcanized elastomer sheet is wound thereon to provide an unvulcanized upper elastomer layer, The elastomer layer is pressed in the second pressing step. Next, in the second cutting step, the surface of the upper elastomer layer is cut, whereby the thickness of the upper elastomer layer is made uniform to a predetermined thickness and the variation in thickness is cancelled. Thereafter, in the vulcanization step, a cylindrical slab having the lower unvulcanized elastomer layer, the core member, and the upper unvulcanized elastomer layer is pressure vulcanized.
[0011]
Therefore, since the thickness of each elastomer layer is made uniform to a predetermined thickness, the belt thickness itself is made uniform to a predetermined thickness. Further, since the respective elastomer layers are made uniform to a predetermined thickness, the core body member interposed between the two elastomer layers is properly positioned at a predetermined position in the belt thickness direction.
[0012]
In the invention of claim 2, in the invention of claim 1 above, in the first cutting step, the cylindrical slab having the lower elastomer layer is removed from the cylindrical mold and wound between the two axes, and the two axes It is assumed that the surface of the lower elastomer layer is cut while traveling while applying tension between them.
[0013]
In the above configuration, the cylindrical slab having the lower elastomer layer provided in the first molding step is pressed from the cylindrical mold in the first cutting step after being pressed in the first pressing step. And wound between two shafts. Then, the surface is cut while traveling while being applied with tension between the two axes. Accordingly, when the surface of the lower elastomer layer is cut while rotating the mold on the cylindrical mold, it is difficult to cut the surface of the lower elastomer layer due to the slab sliding on the mold. On the other hand, the slab can be driven more reliably, and therefore the cutting can be performed more reliably.
[0014]
In the invention of claim 3, in the invention of claim 1 above, in the second pressurizing step, the peripheral length change due to the pressurization of the cylindrical slab having the lower elastomer layer, the core body member and the upper elastomer layer is changed. Pressurize until stable.
[0015]
In the above configuration, in the second pressurizing step, the cylindrical slab having the lower elastomer layer, the core body member, and the upper elastomer layer is pressurized. With the pressurization, the circumference of the slab is It changes in the direction of shortening. At this time, by applying pressure until the change in the circumferential length is stabilized, the elastomer of the upper elastomer layer is almost completely covered with the core body member. Thereby, the surrounding elastomer flows through the portion of the core member in which the elastomer of the upper elastomer layer is incompletely covered during the vulcanization process performed after the thickness is equalized to the predetermined thickness in the second cutting process. Thickness variations caused by this are avoided.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 2 shows the configuration of a high-load transmission V-belt according to an embodiment of the present invention. This high-load transmission V-belt includes a number of blocks arranged at predetermined pitch intervals in the belt length direction. 7, 7,... Are locked and fixed by tension bands 1 and 1 as a pair of left and right belts, and are wound around a transmission pulley having a variable pulley groove width.
[0017]
First, each shape of the tension bands 1, 1 and the blocks 7, 7,. Each of the tension bands 1 is of a cogged belt type having cogs on both sides thereof, and the lower surface thereof has a circular arc shape provided so as to extend in the belt width direction as shown in FIG. A plurality of lower surface grooves 1a, 1a,... Are formed on the upper surface, and a plurality of upper surface grooves 1b, 1b,. Are arranged at predetermined pitch intervals and corresponding to the top and bottom.
[0018]
On the other hand, each block 7 has a substantially trapezoidal shape in which the dimension in the belt width direction becomes smaller toward the lower surface side, and the left and right side surfaces in the belt width direction are slidable contact portions that are in sliding contact with the groove surface of the transmission pulley. 8,8. Further, on both the left and right sides of each block 7, there are provided slit-like fitting portions 9, 9 that penetrate in the belt length direction and extend in the belt width direction and open to the side. Each of the tension bands 1 is pushed into the joint 9 so that the blocks 7, 7,... Are locked and fixed by the pair of left and right tension bands 1,1. Specifically, an upward projecting ridge 7 a is formed at the lower edge of each fitting portion 9, which has an arcuate cross-sectional shape protruding upward and engages with the lower surface groove 1 a of the tension band 1. On the other hand, the lower edge of each fitting portion 9 is provided with a downward projecting ridge 7b that has a concave cross section projecting downward and engages with the upper surface groove 1b of the tension band. Thus, each block 7 is locked and fixed.
[0019]
Next, the structure of each tension band 1 will be described. Each tension band 1 extends substantially in the belt length direction (substantially left-right direction in FIG. 3) and is disposed in a spiral shape with a predetermined pitch interval in the belt width direction. A lower rubber layer 3 as a lower elastomer layer disposed on the belt inner surface side (lower surface side in the figure) and an upper elastomer layer disposed on the belt rear surface side (upper surface side in the figure) of the core body member 2 And a rubber layer 4. Further, a lower canvas layer 5 is integrally provided on the belt inner surface side of the lower rubber layer 3, and an upper canvas layer 6 is integrally provided on the belt rear surface side of the upper rubber layer 4.
[0020]
Here, a method of manufacturing the tension bands 1, 1,... Will be described with reference to FIG. In the following description, “′” is attached to the reference numerals of the lower canvas layer 5, the lower rubber layer 3, the core body member 2, the upper rubber layer 4 and the upper canvas layer 6 in a vulcanized state, , Indicates the state before vulcanization.
[0021]
In this embodiment, after covering the circumferential surface of the cylindrical mold with a cylindrical canvas, an unvulcanized rubber sheet as an unvulcanized elastomer sheet is wound on the canvas to lower the lower canvas layer 5 'and the lower rubber. The first molding step A for providing the layer 3 ', the first pressurizing step B for pressurizing the lower rubber layer 3', and the thickness of the lower rubber layer 3 'pressed in the first pressurizing step B are as follows. A first cutting step C for cutting the surface of the lower rubber layer 3 'so as to be uniform to a predetermined thickness, and a core body on the lower rubber layer 3' whose surface has been cut in the first cutting step C After the member 2 'is wound, a second molding step D in which an upper rubber layer 4' is provided by winding an unvulcanized rubber sheet on the core member 2 ', and the upper rubber layer 4' is pressurized. 2 pressurization step E and a table of the upper rubber layer 4 'so that the thickness of the upper rubber layer 4' pressed in the second pressurization step E is equalized to a predetermined thickness. A second cutting step F for cutting the upper canvas layer 6 ′ on the upper rubber layer 4 ′ whose surface has been cut in the second cutting step F, and the lower canvas layer 5 ′. , A pressure vulcanization step H for pressure vulcanizing a cylindrical slab composed of the lower rubber layer 3 ', the core body member 2', the upper rubber layer 4 'and the upper canvas layer 6'. Manufacturing.
[0022]
More specifically, first, in the first molding step A, a cylindrical canvas is covered with a cylindrical canvas, and then an unvulcanized rubber sheet is wound a predetermined number of times (for example, three times) thereon. . Thus, the lower canvas layer 5 ′ and the lower rubber layer 3 ′ are provided. Next, in the 1st pressurization process B, the said mold is assembled | attached to a gasket, the lower canvas layer 5 'and the lower rubber layer 3' are squeezed, and the cylindrical slab w obtained by this is removed from a cylindrical mold.
[0023]
Then, in the first cutting step C, as shown in FIG. 4, using a belt traveling device including the drive shaft 10 and the driven shaft 11, the slab w is wound between the drive shaft 10 and the driven shaft 11, Further, the cylindrical slab w is moved in the direction in which the axis of the driven shaft 11 is inclined with respect to the drive shaft 10 and the distance between the two axes is increased (the left direction in the figure). While traveling while applying tension, the blade 12 is moved in the direction opposite to the above direction (the right direction in the figure), thereby cutting the surface of the lower rubber layer 3 ′ on the drive shaft 10. To do.
[0024]
Next, in the second molding step D, the cylindrical slab w is removed from the drive shaft 10 and the driven shaft 11 and covered with a cylindrical mold, and the core member 2 'is wound spirally thereon, and further unvulcanized. A rubber sheet is wound a predetermined number of times (for example, three times) to provide an upper rubber layer 4 '. Thereafter, in the second pressurizing step E, the mold is assembled to the gasket, and the cylindrical slab composed of the lower canvas layer 5 ′, the lower rubber layer 3 ′, the core body member 2 ′ and the upper rubber layer 4 ′ is squeezed. In that case, the said cylindrical slab is squeezed until the circumference change by pressing is stabilized. That is, since the perimeter of the slab changes in a direction that becomes shorter as it is squeezed, it is squeezed until the perimeter change hardly changes.
[0025]
And in the 2nd cutting process F, the surface of upper rubber layer 4 'is cut using a blade, rotating the said metal mold | die. Next, in the third molding step G, the upper canvas layer 6 ′ is provided by covering the upper rubber layer 4 ′ whose surface has been cut in the second cutting step F with a cylindrical canvas. Thereafter, in the pressure vulcanization step H, the tubular slab composed of the lower canvas layer 5 ′, the lower rubber layer 3 ′, the core member 2 ′, the upper rubber layer 4 ′ and the upper canvas layer 6 ′ is vulcanized while being compressed. To do. Through the above steps A to F, a belt molded body in which a plurality of tension bands 1, 1,... Are integrally coupled in the belt width direction is obtained. Each tension band 1 can be obtained by cutting the width into two.
[0026]
Therefore, according to this embodiment, when manufacturing the tension bands 1, 1,... Used for the high load transmission V-belt, the unvulcanized lower rubber layer 3 ′ provided in the first molding step A is used. Since the surface of the lower rubber layer 3 ′ is cut in the first cutting step C after squeezing in the first pressure step B, the variation in the thickness of the rubber sheet is canceled and the lower rubber layer 3 ′ is removed. It can be uniformized to a predetermined thickness.
[0027]
In addition, after the unvulcanized upper rubber layer 4 ′ provided in the second molding step D is squeezed in the second pressure step E, the surface of the upper rubber layer 4 ′ is cut in the second cutting step F. Thus, as in the case of the lower rubber layer 3 ', the variation in the thickness of the rubber sheet can be canceled and the upper rubber layer 4' can be made uniform to a predetermined thickness.
[0028]
In addition, in the second pressurizing step E, since the squeezing is performed until the change in the circumferential length of the cylindrical slab is stabilized, the rubber of the upper rubber layer 4 ′ can be covered almost completely on the core body member 2 ′. As a result, during the subsequent pressure vulcanization step H, the surrounding rubber flows into the portion of the core member 2 'where the rubber of the upper rubber layer 4' is only incompletely covered. Variations in thickness that occur can be avoided, and the thickness of the upper rubber layer 4 'can be made more uniform.
[0029]
Therefore, when manufacturing the tension bands 1, 1,... Using rubber sheets having variations in thickness, the rubber layers 3 ′, 4 ′ are formed without reducing variations in the thickness of the rubber sheets themselves. It can be uniformized to a predetermined thickness.
[0030]
Further, the upper rubber layer 4 'and the lower rubber layer 3' are uniformized to a predetermined thickness, so that the core member 2 'interposed between the rubber layers 4' and 3 'can be moved in the belt thickness direction. It can also be properly positioned at a predetermined position.
[0031]
Further, in the first cutting step C, the cylindrical slab w is removed from the mold, wound around the two shafts 10 and 11, and the lower rubber layer 3 'while running while applying tension between the two shafts 10 and 11. Since the surface is cut, it is possible to cut more reliably than when the die is driven to rotate on the die.
[0032]
In the above embodiment, the cogged belt type tension bands 1, 1,... Having cogs on both sides of the belt have been described. However, the present invention provides an elastomer on both sides of the core member 2 as shown in FIG. The layers 3 and 4 can be applied as long as there is no means for holding the core member 2 at a predetermined position in the belt thickness direction during belt manufacture. Further, in the case where the canvas layers are provided on both sides of the belt as in the above embodiment, as long as the canvas layers 5 and 6 are arranged in a portion not in contact with the core body member 2 as shown in FIG. The application of the present invention is possible.
[0033]
(Concrete example)
Next, the production of the tension band will be specifically described. In addition, as an unvulcanized rubber sheet for forming the lower rubber layer and the upper rubber layer, one having a thickness design value of 0.7 mm was used.
[0034]
First, the rubber sheet was wound only three times around the peripheral surface of a cylindrical mold covered with a cylindrical canvas to provide an unvulcanized lower rubber layer (first molding step). When the thickness of the peak portion between the lower surface grooves of the lower rubber layer was measured, there was a variation of about ± 0.06 mm.
[0035]
Next, after assembling the above mold into the gasket and pressing the lower rubber layer (first pressurizing step), the slab composed of the lower canvas layer and the lower rubber layer is removed from the mold and the thickness of the crest portion is increased. When the variation was measured, it was about ± 0.17 mm. On the other hand, after removing the slab from the mold and winding it between two shafts, cutting the surface of the lower rubber layer while applying tension between the two shafts (first cutting step), the mountain When the thickness of the portion was measured, the variation was about ± 0.03 mm. That is, by the first cutting step, the thickness variation of the unvulcanized lower rubber layer is reduced from ± 0.17 mm to ± 0.03 mm.
[0036]
Furthermore, the slab is mounted on a cylindrical mold, and an unvulcanized upper rubber layer is provided by winding an unvulcanized rubber sheet only three times on the core body member (second molding step). After assembling the mold on the gasket and pressing the upper rubber layer (second pressing step), the slab was cut open and the thickness of the peak portion was measured. The variation was about ± 0.16 mm. On the other hand, when the thickness of the crest is measured after the die is rotated after the pressurization and the surface of the upper rubber layer is cut with a blade (second cutting step), the variation is about ± 0.04 mm. Met. That is, by the second cutting step, the variation in the thickness of the peak portion obtained by adding the upper rubber layer to the lower rubber layer is reduced from ± 0.16 mm to ± 0.04 mm.
[0037]
And after covering a canvas on the slab and providing an upper canvas layer (third molding step), vulcanizing while pressing the lower rubber layer and the upper rubber layer (pressure vulcanization step) When the thickness of the peak portion of the (belt molded product) was measured, the variation in thickness was about ± 0.06 mm. Subsequently, when the distance between the axes of a plurality of tension bands obtained by cutting the slab into a width of 10 mm was measured, the variation in the distance between the axes was about ± 0.02 mm.
[0038]
On the other hand, the same material as that in the above-described invention example was used, and a tension band as a comparative example was produced without performing the first and second cutting steps. As a result, the variation in the thickness of the peak portion of the obtained tension band is about ± 0.30 mm (± 0.06 mm in the case of the invention example), and the variation in the distance between the axes is ± 0.09 mm (invention). In the case of the example, it was about ± 0.02 mm). That is, comparing the two, in the invention example, the variation in thickness is approximately 1/5 (= 0.06 / 0.30), and the variation in the distance between axes is approximately 1 / 4.5 (= 0.02). /0.09).
[0039]
Furthermore, in the case of the said invention example, it was made to squeeze until the outer peripheral length of a slab hardly changed at the time of a 2nd pressurization process. That is, as the slab is squeezed, the temperature of the slab changes with the outer peripheral length of the slab, but when squeezing while measuring the temperature of the core body layer portion of the slab with the outer peripheral length, the slab temperature When becomes more than a predetermined value, the outer peripheral length hardly changed. Specifically, the outer peripheral length of the slab before the second pressurizing step is 598.0 mm and has a tendency to become shorter as the slab temperature rises. However, as shown in FIG. As the slab temperature becomes 70 ° C. or higher, the value gradually decreases as the temperature rises, and takes a substantially constant value (in the example shown, approximately 597.3 mm). Therefore, when the slab temperature reached 70 ° C., it was considered that the change in the circumference of the slab reached a stable state.
[0040]
When the slab was cut when the slab temperature reached 70 ° C., it was found that the rubber of the upper rubber layer completely covered the core member. Thereafter, a slab in which the rubber is completely covered with the core body member is squeezed and vulcanized to produce a tension band, and when the thickness variation of the peak portion is measured, the above ± 0.06 mm is further increased to ± 0. It was found that it was reduced to 0.04 mm.
[0041]
【The invention's effect】
As described above, according to the invention of claim 1, as a method of manufacturing a belt in which an elastomer layer is disposed on both surfaces of a core body member, unvulcanized on a cylindrical mold in the first and second molding steps. After the first and second pressurizing steps of pressurizing each of the unvulcanized elastomer layers provided by winding the elastomer sheet, the surface of each elastomer layer is cut to a predetermined thickness. Since the first and second cutting steps are made uniform, variations in the belt thickness can be reduced without making the thickness of the elastomer sheet itself uniform, and each of the elastomer layers can be reduced. By equalizing each to a predetermined thickness, the core body member can be properly positioned at a predetermined position in the belt thickness direction.
[0042]
According to the invention of claim 2, in the first cutting step, the cylindrical slab having the lower elastomer layer is removed from the cylindrical mold and wound between the two axes, and tension is applied between the two axes. Therefore, the surface of the lower elastomer layer can be cut more securely than when the cylindrical mold is cut while being driven to rotate. Therefore, according to the invention of claim 1 The effect can be obtained efficiently.
[0043]
According to the invention of claim 3, in the second pressurizing step, pressurization is performed until the change in the circumferential length of the cylindrical slab having the lower elastomer layer, the core body member, and the upper elastomer layer is stabilized. The elastomer of the upper elastomer layer can be almost completely covered on the core body member, and therefore, the surrounding elastomer is applied to the portion of the core body member which is only partially covered with the elastomer of the upper elastomer layer during the vulcanization process. Variations in thickness caused by flowing can be avoided, and the thickness of the upper elastomer layer can be further uniformed.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a tension band manufacturing process according to an embodiment of the present invention.
FIG. 2 is a perspective view showing the configuration of a high load transmission V-belt.
FIG. 3 is a longitudinal sectional view schematically showing an enlarged configuration of a tension band.
FIG. 4 is a plan view schematically showing a state in which the surface of the upper rubber layer is cut in the first cutting step.
FIG. 5 is a view corresponding to FIG. 3 and showing the configuration of another belt to which the present invention is applied.
FIG. 6 is a view corresponding to FIG. 3 showing the configuration of another belt to which the present invention is applied.
FIG. 7 is a characteristic diagram showing the relationship between the slab outer peripheral length and the slab temperature in the second pressurizing step.
FIG. 8 is a view corresponding to FIG. 1 showing a conventional belt manufacturing process.
[Explanation of symbols]
A 1st shaping | molding process B 1st pressurization process C 1st cutting process D 2nd shaping | molding process E 2nd pressurization process F 2nd cutting process H Pressure vulcanization process 1 Tension belt (belt)
2 Core member 3 Lower rubber layer (lower elastomer layer)
4 Upper rubber layer (upper elastomer layer)
10 Drive shaft
11 Driven shaft (axis)
w Slab

Claims (3)

A belt comprising a core body member extending in the belt length direction, a lower elastomer layer disposed on the belt inner surface side of the core body member, and an upper elastomer layer disposed on the belt back surface side of the core body member. A manufacturing method of
A first molding step in which an unvulcanized elastomer sheet is wound around a peripheral surface of a cylindrical mold to provide an unvulcanized lower elastomer layer;
A first pressurizing step of pressurizing the lower elastomer layer;
A first cutting step of cutting the surface of the lower elastomer layer so that the thickness of the lower elastomer layer pressed in the first pressing step is uniformized to a predetermined thickness;
After the core member is wound on the lower elastomer layer whose surface is cut in the first cutting step, an unvulcanized upper elastomer layer is provided by winding an unvulcanized elastomer sheet on the core member. A second molding step;
A second pressurizing step of pressurizing the upper elastomer layer;
A second cutting step of cutting the surface of the upper elastomer layer so that the thickness of the upper elastomer layer pressed in the second pressing step is uniformized to a predetermined thickness;
And a pressure vulcanization step for pressure vulcanizing a cylindrical slab having the unvulcanized lower elastomer layer, the core member, and the unvulcanized upper elastomer layer. Manufacturing method. In the manufacturing method of the belt of Claim 1,
In the first cutting step, the cylindrical slab having the lower elastomer layer is removed from the cylindrical mold and wound between two axes, and the surface of the lower elastomer layer is moved while being applied with tension between the two axes. A method for manufacturing a belt, characterized by cutting the belt. In the manufacturing method of the belt of Claim 1,
In the second pressurizing step, a belt slab having a lower elastomer layer, a core body member, and an upper elastomer layer is pressurized until a change in circumferential length due to the pressurization is stabilized.

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