JP2007210180A - Lapping cloth winding apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lapping cloth winding apparatus capable of suppressing the irregularity of the winding tension of lapping cloth. <P>SOLUTION: The lapping cloth winding apparatus is equipped with a bobbin 4, its brake mechanism 5, a mandrel 6, a movable shaft 7 and a fixed shaft 8. The movable shaft 7 is supported in a movable manner by a spring 9 and an unvulcanized rubber molded body 2 is mounted on the mandrel 6. The lapping cloth 3 drawn out of the bobbin 4 is trained over the movable shaft 7 and the fixed shaft 8 to be wound around the unvulcanized rubber molded body 2. The mandrel 6 is rotated to wind the lapping cloth 3 while drawing out the same. The movable shaft 7 is moved against the energizing force of the spring 9 corresponding to the tension of the lapping cloth 3. The contact angle of the lapping cloth 3 with the movable shaft 7 and the fixed shaft 8 is automatically regulated and the friction force thereof is automatically regulated. The winding tension (T) of the lapping cloth 3 is kept constant. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to, for example, a wrapping cloth winding apparatus for winding a tape-shaped wrapping cloth around a cylindrical unvulcanized rubber molded body in a spiral shape when the vulcanized mold is formed.

  In general, a long cylindrical rubber product such as a rubber hose is wrapped around a cylindrical unvulcanized rubber molded body molded around a mandrel, wrapped with a thin cloth (hereinafter referred to as a wrapping cloth) and tightened. It is heated in a sulfur can and vulcanized (for example, Patent Document 1).

The wrapping cloth is wound by rotating the wrapping cloth drawn out from the bobbin by rotating it while moving it in the direction of the central axis at a constant speed while holding the cylindrical unvulcanized rubber molded body from the inside with a mandrel. The unvulcanized rubber molded body is wound around in a spiral shape.
Utility 2003-145634 (paragraph numbers 0024, 0025, FIG. 5)

  However, the above method of winding and wrapping the wrapping cloth by moving and rotating the mandrel in the axial direction at a constant speed has no problem when the outer diameter of the cylindrical rubber product to be formed is constant over the entire length. When the outer diameter of the rubber product is changing along the axial direction, it is easy to cause a variation in winding tension around the unvulcanized rubber molded body. As a result, the tightening stress due to the wrapping cloth becomes non-uniform, which may cause variations in product shape and physical properties after vulcanization molding.

  An object of this invention is to provide the wrapping cloth winding apparatus which can suppress the dispersion | variation in the winding tension | tensile_strength of a wrapping cloth.

  In order to achieve the above object, a wrapping cloth winding apparatus according to the present invention is for winding a tape-shaped wrapping cloth in a spiral shape around a cylindrical body, and is a bobbin for winding and holding a wrapping cloth around a circumferential surface. And rotating around the cylinder center axis while moving the cylinder body in the direction of the cylinder center axis while holding the cylinder from the inside, pulling out the wrapping cloth while rotating the bobbin and winding it around the cylinder A cylindrical body holding shaft and a brake mechanism that applies rotational resistance to the bobbin and applies tension to the wrapping cloth are provided.

  Further, between the bobbin and the cylinder holding shaft, one or a plurality of shafts having a circular cross section in which the wrapping cross drawn from the bobbin slides on the peripheral surface is provided so as not to rotate, and at least one of the shafts is As a movable shaft that can move in a direction orthogonal to the central axis, the contact angle between the movable shaft and the wrapping cloth is adjusted by adjusting the contact angle between the movable shaft and the wrapping cloth.

  According to the above configuration, since the wrapping cloth slides on the peripheral surface of the shaft, the tension on the downstream side (cylinder side) of the wrapping cloth is made different from the tension on the upstream side (bobbin side) by the friction force. Furthermore, by moving the movable shaft in a direction perpendicular to its central axis and adjusting the contact angle between the movable shaft and the wrapping cloth, the frictional force between the two can be adjusted to adjust the wrapping cloth. The downstream tension can be adjusted. Thereby, even if it is a case where the outer diameter changes, for example, a cylinder has a different diameter part, the dispersion | variation in the winding tension to the cylinder of a wrapping cloth can be suppressed.

  Here, the contact angle between the shaft and the wrapping cloth is a central angle corresponding to the contact surface with the wrapping cloth on the shaft peripheral surface. When one shaft is provided, one is a movable shaft, and when multiple shafts are provided, at least one is a movable shaft, and the remaining is a fixed shaft that cannot move in a direction perpendicular to the central axis. And Even when a plurality of shafts are provided, it is not always necessary to provide a fixed shaft, and all the shafts may be movable shafts.

  When multiple shafts are provided, the total of the contact angles between each shaft including the fixed shaft and the wrapping cloth is adjusted by moving the movable shaft, thereby adjusting the total frictional force between them. What should I do?

That is, the winding tension (T) of the wrapping cloth can be expressed by the following equation, and the winding tension (T) of the wrapping cloth can be adjusted by adjusting the total contact angle (Σθ). .
T = F · e ^{μ0 (Σθ)}
Here, F is the pulling tension of the wrapping cloth from the bobbin, μ0 is the dynamic friction coefficient between the wrapping cloth and the shaft, and θ is the contact angle between each shaft and the wrapping cloth.

  If the movable shaft is elastically supported by a spring, etc. and moved to a position corresponding to the tension of the wrapping cloth sliding on its peripheral surface, the winding tension of the wrapping cloth is automatically adjusted. Can do. In other words, the elastically supported movable shaft moves with the change in contact pressure due to the change in tension of the wrapping cloth that slides on its peripheral surface, so the contact angle with the wrapping cloth is automatically changed, and the wrapping cloth Adjust the winding tension.

  Specifically, when the tension of the wrapping cloth is high, the contact pressure between the movable shaft and the wrapping cloth also increases, and the movable shaft is moved against the spring. As a result, the contact angle (θ) between the shaft and the wrapping cloth is reduced, so that the winding tension (T) of the wrapping cloth can be stabilized without increasing according to the above formula.

  On the other hand, when the tension of the wrapping cloth is small, the contact pressure between the movable shaft and the wrapping cloth also decreases, and the movable shaft moves by the biasing force of the spring. As a result, the contact angle (θ) between the shaft and the wrapping cloth is increased, so that the winding tension (T) of the wrapping cloth can be stabilized by the above formula without decreasing.

  If the rotational resistance applied to the bobbin by the brake mechanism is adjusted in conjunction with the movement of the movable shaft, in addition to adjusting the contact angle (θ) between the shaft and the wrapping cloth, the pulling tension (F) of the wrapping cloth from the bobbin Can also be adjusted automatically. That is, since Σθ and F in the above formula can be adjusted, the winding tension (T) of the wrapping cloth can be more effectively stabilized.

  When the cylinder is an unvulcanized rubber molded body of a truncated cone-shaped rubber hose, in order to vulcanize and mold such a long unvulcanized rubber molded body, it is necessary to wrap a wrapping cloth to tighten from the outside. In addition, since the wrapping cloth is wound around the truncated cone-shaped unvulcanized rubber molded body whose outer diameter changes, it is preferable to adopt the configuration of the present invention.

  The cylindrical body is not limited to the unvulcanized rubber molded body of the truncated cone-shaped rubber hose, but has a complicated outer shape such as a fender or an air spring, especially those having different diameter portions. It may be a non-vulcanized rubber molded article, etc., and it is preferable to employ the configuration of the present invention for winding the wrapping cloth around them. Furthermore, when molding an unvulcanized rubber molded body, by wrapping a wrapping cloth, it is possible to coarsely tighten the laminated rubber and fibers, thereby eliminating air and improving adhesion. By adopting the configuration of the present invention for this rough tightening, especially when the cylinder has a large diameter or has a long different diameter portion, it is necessary to adjust the wrapping cross tension. It can be made unnecessary.

  As described above, according to the present invention, the shaft on which the wrapping cloth slides is provided, and the movable shaft is moved to adjust the contact angle between the shaft and the wrapping cloth. As a result, the frictional force between the shaft and the wrapping cloth can be adjusted to suppress variations in the wrapping tension of the wrapping cloth. Even in such a case, the tightening stress due to the wrapping cloth can be made uniform, and the product shape and physical properties after vulcanization molding can be stabilized.

  Hereinafter, the best mode for carrying out a wrapping cloth winding apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a wrapping cloth winding apparatus according to the present invention.

  The wrapping cloth winding device 1 is for uniformly winding an unvulcanized rubber molded body 2 as a cylindrical body with a tape-shaped wrapping cloth 3, and a bobbin that winds and holds the wrapping cloth 3 around a circumferential surface. 4, a brake mechanism 5 that applies tension to the wrapping cloth 3 that is pulled out by applying rotational resistance to the bobbin 4, a mandrel 6 as a cylinder holding shaft that holds the unvulcanized rubber molded body 2 from the inside, A plurality of movable shafts 7 provided so as not to be rotatable around the axis and movable in a direction perpendicular to the central axis, and a fixed shaft 8 provided so as not to be rotatable around the central axis and immovable in a direction perpendicular to the central axis. And the mandrel 6 rotates around the central axis while moving in the direction of the central axis, so that the wrapping cloth 3 pulled out from the bobbin 4 is moved to the movable shaft 7 and the fixed shaft. So that the winds spirally circumferential surface of the shift 8 around the slide while the unvulcanized rubber molded body 2.

  The unvulcanized rubber molded body 2 is a cylindrical structure composed of a plurality of layers of unvulcanized rubber layers and reinforcing fiber layers, and has a truncated cone-like laminated structure with different outer diameters at one end and the other end. It is tightened with a wrapping cloth 3 and vulcanized into a truncated cone-shaped rubber hose. The wrapping cloth 3 is, for example, a thin nylon cloth having a constant width, and is wound around the bobbin 4 in advance.

  The bobbin 4 is configured to wind and hold the wrapping cloth 3 around its rotation axis (not shown), and by pulling out the wrapping cloth 3 from the bobbin 4 while the rotation resistance is applied by the brake mechanism 5. The wrapping cloth 3 to which tension is applied is supplied.

  The brake mechanism 5 presses the brake pad 5 a against the wrapping cloth 3 wound around the rotating shaft of the bobbin 4 to give rotational resistance to the bobbin 4. The brake pad 5a is urged toward the rotating shaft of the bobbin 4 so as to follow the change in the winding diameter of the wrapping cloth 3 wound around the bobbin 4, and further, the rotational resistance of the bobbin 4 is adjusted by adjusting the urging force. Is adjustable.

  The mandrel 6 has a truncated cone shape having different outer diameters on one end side and the other end side, and a plurality of unvulcanized rubber layers and reinforcing fiber layers are wound around the mandrel 6 to mold the unvulcanized rubber molded body 2. It is like that. The mandrel 6 rotates around the central axis while moving in the direction of the central axis while holding the unvulcanized rubber molded body 2 from the inside, and pulls out the wrapping cloth 3 while rotating the bobbin 4 so as to make it uniform. The unvulcanized rubber formed body 2 is wound with a winding tension.

  The plurality of movable shafts 7 are arranged in two rows between the bobbin 4 and the mandrel 6, and the fixed shaft 8 is arranged closer to the mandrel 6 than the movable shaft 7, and constitutes one row together with the movable shaft 7. is doing. The two rows of the movable shaft 7 and the fixed shaft 8 each have a circular cross section, and the mandrel 6 while sliding the circumferential surface of the wrapping cloth 3 drawn out of the bobbin 4 and hung in a zigzag manner with frictional force. Is supposed to lead to.

  Each movable shaft 7 is biased in a direction away from the other row by springs 9 that support both ends thereof, and resists the biasing force of the springs 9 by contact pressure with the wrapping cloth 3. The contact pressure between the wrapping cloth 3 and the movable shaft 7 is due to the tension of the wrapping cloth 3, and the movable shaft 7 changes to the magnitude of the tension of the wrapping cloth 3 by changing the contact pressure with the change in tension. It moves to the corresponding position. Instead of the spring 9, the movable shaft 7 may be elastically supported using other means having spring characteristics.

  By the movement of the movable shaft 7, the contact angle (θ) between each movable shaft 7 and the fixed shaft 8 and the wrapping cloth 3 is automatically adjusted according to the magnitude of the tension of the wrapping cloth 3. As a result, the total contact angle (Σθ) is automatically adjusted, the total frictional force between the wrapping cloth 3 and the movable shaft 7 and the fixed shaft 8 is automatically adjusted, and the winding tension (T) of the wrapping cloth 3 is automatically adjusted. Adjusted.

  Next, how a wrapping cloth is wound around a truncated cone-shaped unvulcanized rubber molding will be described. FIG. 2 is a side view of the wrapping cloth winding device, showing how the wrapping cloth is wound around the small diameter portion of the unvulcanized rubber molded body. FIG. 3 is a side view of the wrapping cloth wrapping apparatus, showing how the wrapping cloth is wound around the large diameter portion of the unvulcanized rubber molded body.

  First, the unvulcanized rubber molded body 2 is molded around the mandrel 6 or the molded unvulcanized rubber molded body 2 is set on the mandrel 6. Next, the wrapping cloth 3 wound in advance from the bobbin 4 is pulled out and hung in a zigzag manner on the two rows of the movable shaft 7 and the fixed shaft 8, and the tip of the wrapping cloth 3 is attached to the unvulcanized rubber molded body 2. Wrap.

  Thereafter, the wrapping cloth 3 is pulled out while rotating the bobbin 4 by rotating the mandrel 6 around the central axis at a constant rotational speed while moving the mandrel 6 in the central axis direction at a constant speed. Wrap in a spiral. At that time, since the brake mechanism 5 imparts rotational resistance to the bobbin 4, tension is imparted to the wrapping cloth 3 and the unvulcanized rubber molded body 2 is tightened.

  As shown in FIG. 2, when the wrapping cloth 3 is wound around the small diameter portion of the unvulcanized rubber molded body 2, the tension is small, and the movable shaft 7 is separated from the other row by the urging force of the spring 9. The contact angle (θ7, θ8) between the movable shaft 7 and the fixed shaft 8 and the sum (Σθ) thereof are increased. As a result, the total frictional force between the wrapping cloth 3 and the movable shaft 7 and the fixed shaft 8 is increased, so that the torque for rotating the unvulcanized rubber molded body 2 is small, but the winding tension (T) of the wrapping cloth 3 is small. Kept constant.

  As shown in FIG. 3, when the wrapping cloth 3 is wound around the large diameter portion of the unvulcanized rubber molded body 2, the tension is large and the movable shaft 7 approaches the other row against the biasing force of the spring 9. The contact angles (θ7, θ8) between the wrapping cloth 3 and the movable shaft 7 and the fixed shaft 8 and the sum (Σθ) thereof are reduced. As a result, the total frictional force between the wrapping cloth 3 and the movable shaft 7 and the fixed shaft 8 is reduced. Therefore, although the torque for rotating the unvulcanized rubber molded body 2 is large, the winding tension (T) of the wrapping cloth 3 is high. Kept constant.

  By adjusting the strength of the spring 9, the relationship between the tension of the wrapping cloth 3 and the moving distance of the movable shaft 7 can be set as appropriate, whereby the contact angle (θ7, θ8) changes to change the integral. The winding tension (T) of the wrapping cloth 3 that is maintained at a desired value can be set to a desired magnitude. Thus, since the wrapping cloth 3 can be wound with a constant winding tension (T) in the range from the small diameter portion to the large diameter portion of the unvulcanized rubber molded body 2, the entire unvulcanized rubber molded body 2 can be It can be tightened with a certain appropriate strength.

  Next, the wrapping cloth winding apparatus of the present invention having the movable shaft and the wrapping cloth winding apparatus having only the fixed shaft will be compared. 4A and 4B are schematic views showing a wrapping cloth winding apparatus according to the present invention, in which FIG. 4A shows a state in which the wrapping cloth is wound around a small diameter portion of an unvulcanized rubber molding, and FIG. 4B shows an unvulcanized wrapping cloth. A state where the rubber molded body is wound around the large diameter portion is shown.

  Each of the wrapping cloth winding devices to be compared is an arrangement in which four shafts that are slid by wrapping the wrapping cloth 3 between the bobbin 4 and the mandrel 6 are arranged in a U shape, and the outer diameter of the small diameter portion is φ120 mm. The wrapping cloth 3 is wound around an unvulcanized rubber molded body 2 of a rubber hose whose outer diameter is 150 mm and whose length is 3300 mm.

The winding tension (T) of the wrapping cloth 3 sliding on the peripheral surface of the plurality of shafts is the pulling tension (F) of the wrapping cloth 3 from the bobbin 4, the contact angle (θ) between the wrapping cloth 3 and each shaft, And its dynamic friction coefficient (μ0),
T = F · e ^{μ0 (Σθ)}
It can be expressed as Here, the dynamic friction coefficient (μ0) is constant, and μ0 = 0.3.

  In the wrapping cloth winding apparatus 1 of the present invention, two of the four shafts are movable shafts 7a and 7b, and the remaining two are fixed shafts 8a and 8b, and the movable shafts 7a and 7b are fixed. The shafts 8a and 8b are alternately arranged. The movable shafts 7 a and 7 b are spring-supported at both ends, and are movable in a direction connecting the bobbin 4 and the mandrel 6.

When the winding tension (T) by the wrapping cloth winding device 1 is set to 20 (kgf), the contact angles between the wrapping cloth 3 and the movable shafts 7a and 7b and the fixed shafts 8a and 8b are set to θ7a, θ7b, θ8a, and Assuming θ8b, the above equation is
20 (kgf) = F · e ^{0.3 (θ7a + θ7b + θ8a + θ8b)}
It is expressed.

Further, as shown in FIG. 4A, when the wrapping cloth 3 is wound around the small diameter portion, when the movable shafts 7a and 7b move so that θ7a + θ7b + θ8a + θ8b = 2π, this is substituted into the above-described equation,
F = 20 / e ^{0.3 ·} 2π≈3.03 (kgf)
Is obtained.

On the other hand, as shown in FIG. 4B, when the wrapping cloth 3 is wound around the large-diameter portion, the torque of the mandrel 6 changes and the winding tension (T) increases, and the movable shafts 7a and 7b are moved to the mandrel 6. And the contact angles (θ7a, θ7b, θ8a, θ8b) are changed, and the winding tension (T) is maintained at 20 (kgf). For example, when the movable shafts 7a and 7b move so that θ7a + θ7b + θ8a + θ8b = 1.5π, this is substituted into the above-described equation,
F = 20 / e ^{0.3 · 1.5π≈4.86} (kgf)
Is obtained.

  Here, the pulling tension (F) of the wrapping cloth 3 can be adjusted by a brake mechanism 5 that imparts rotational resistance to the bobbin 4, and the winding tension (T) of the wrapping cloth 3 can be adjusted by adjusting the pulling tension (F). ) Can be kept constant.

  Thus, when the winding tension (T) of the wrapping cloth 3 around the small diameter portion is set to 20 (kgf), the wrapping cloth winding device 1 of the present invention has a winding tension (T) around the large diameter portion of 20 as well. (Kgf), and the unvulcanized rubber molded body 2 whose outer diameter is not constant can be wound and vulcanized with a uniform winding tension (T).

  On the other hand, when a wrapping cloth winding device having only the fixed shaft 8 is used, if the winding tension (T) of the wrapping cloth 3 around the small diameter portion is set to 20 (kgf), the winding around the large diameter portion is performed. The tension (T) is about 1.5 times 32 (kgf), and the change in the winding tension (T) changes the shape of the product and lowers the dimensional accuracy.

  According to the above configuration, the movable shaft 7 and the fixed shaft 8 that are slid by wrapping the wrapping cloth 3 are arranged between the bobbin 4 and the mandrel 6, and the movable shaft 7 is moved so that the wrapping cloth 3 is moved. Since the acting frictional force is adjusted, the winding tension (T) of the wrapping cloth 3 can be kept constant. In particular, since the movable shaft 7 is supported by the spring 9 and can be moved in a direction perpendicular to the central axis, the winding tension (T) of the wrapping cloth 3 is automatically fixed even if the outer diameter of the winding portion changes. And can be wound with a uniform tightening stress.

  Since the tension required for winding the wrapping cloth 3 is solely due to the rotational force of the mandrel 6, the winding speed of the wrapping cloth 3 can be controlled by controlling the operation of the mandrel 6, and the bobbin 4, mandrel 6, movable The tension can be adjusted only by the shaft 7 and the fixed shaft 8, and desired characteristics can be obtained by a space-saving and inexpensive facility.

  In addition, this invention is not limited to said embodiment, A change can be suitably added within the scope of the present invention. For example, instead of the brake mechanism 5, as shown in FIG. 5, a brake mechanism 10 including a brake pad 10 a and an interlocking rod 10 b that interlocks the movable shaft 7 and the brake pad 10 a may be provided. The interlocking rod 10 b is elastically expandable and contractible in the central axis direction, and presses the brake pad 10 a against the bobbin 4 with a force proportional to the moving amount of the movable shaft 7. Thereby, the rotational resistance applied to the bobbin 4 can be adjusted in conjunction with the movement of the movable shaft 7, and the winding tension (T) of the wrapping cloth 3 can be further stabilized.

  The cylindrical body around which the wrapping cloth 3 is wound is not limited to the unvulcanized rubber molded body 2 of the truncated cone-shaped rubber hose, but has a different outer diameter such as a fender and an air spring. An unvulcanized rubber molded body having a complicated shape may be used. Further, when molding the unvulcanized rubber molded body 2, the wrapping cloth 3 can be wound for the purpose of roughing the laminated rubber and fibers to eliminate air and improve the adhesion. In particular, even when the cylindrical body has a large diameter or has a long different diameter portion, the use of the present invention makes it unnecessary to adjust the winding tension of the wrapping cloth 3. it can.

  The fixed shaft 8 is not necessarily provided. When a single shaft is provided, the fixed shaft 8 may be the movable shaft 7. Further, even when a plurality of shafts are provided, all of the shafts can be used as the movable shaft 7.

1 is a perspective view of a wrapping cloth winding apparatus according to the present invention. It is a side view of a wrapping cloth winding device, and shows a state of wrapping a wrapping cloth around a small diameter part of an unvulcanized rubber molded body It is a side view of a wrapping cloth winding device, and shows a state of wrapping a wrapping cloth around a large diameter portion of an unvulcanized rubber molded body BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the wrapping cloth winding apparatus of this invention, (a) shows a mode that a wrapping cloth is wound around the small diameter part of an unvulcanized rubber molding, (b) is an unvulcanized rubber molding Shows how to wrap around the large diameter part of The perspective view which shows another form of a brake mechanism

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wrapping cloth winding apparatus 2 Unvulcanized rubber molding 3 Lapping cloth 4 Bobbin 5 Brake mechanism 6 Mandrel 7 Movable shaft 8 Fixed shaft 9 Spring 10 Brake mechanism

Claims (5)

A wrapping cloth winding device for spirally winding a tape-shaped wrapping cloth around a cylindrical body,
A bobbin that wraps and holds the wrapping cloth around a peripheral surface, and while rotating the bobbin by rotating around the cylinder center axis while moving the cylinder body in the direction of the cylinder center axis while holding the cylinder body from the inside. A cylinder holding shaft that pulls out the wrapping cloth and spirally winds around the cylinder, and a brake mechanism that applies rotational resistance to the bobbin to apply tension to the wrapping cloth,
Between the bobbin and the cylindrical body holding shaft, one or a plurality of shafts having a circular cross section in which a wrapping cross drawn from the bobbin slides on the peripheral surface is provided so as not to rotate, and at least one of the shafts is The movable shaft is movable in a direction perpendicular to the central axis, and the contact angle between the movable shaft and the wrapping cloth is adjusted by the movement of the movable shaft to adjust the frictional force between them. Wrapping cloth wrapping device.   A plurality of the shafts are provided, and by moving the movable shaft among the plurality of shafts, the sum of the contact angles between the shafts and the wrapping cloth is adjusted, and the sum of the frictional forces between them is adjusted. The wrapping cloth winding apparatus according to claim 1, wherein   The wrapping cloth wrapping apparatus according to claim 1 or 2, wherein the movable shaft is elastically supported so as to move to a position corresponding to the magnitude of the tension of the wrapping cloth sliding on the peripheral surface thereof. .   The wrapping cloth wrapping device according to claim 1, wherein the rotation resistance applied to the bobbin of the brake mechanism is adjusted in conjunction with the movement of the movable shaft.   5. The cylindrical body is an unvulcanized rubber molded body of a truncated cone-shaped rubber hose, and a wrapping cloth for tightening from outside is wound when the molded body is vulcanized. Wrapping cloth winding apparatus as described.

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