JP2011207579A - Coated roll and carrying device of belt-like body using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coated roll for surely fixing a nonwoven fabric sheet to a roll core via a rubber lining layer, by enhancing frictional force between a belt-like body and itself by winding the nonwoven fabric sheet on a surface, and to provide a carrying device of the belt-like body using the coated roll.SOLUTION: This coated roll 10 includes a metallic roll core 2, the rubber lining layer 4 coating the surface of the roll core, and the nonwoven fabric sheet 6 wound on the rubber lining layer.

Description

  The present invention relates to a roll used for transporting a belt-like body such as a metal strip.

Conventionally, metal rolls have been widely used as rolls for transporting strips such as metal strips. However, since the metal rolls are hard, there is a problem that dents and scratches are generated on the strips. Then, the roll which lined rubber on the metal roll surface, and the roll which wound the nonwoven fabric around the metal roll surface are known.
Furthermore, in order to prevent the nonwoven fabric from spinning away from the roll, a technology has been developed in which a sheet having hook-like materials densely attached to the roll surface and the nonwoven fabric is engaged with the hook-like material. (Patent Document 1). In addition, a technique has been developed in which a nonwoven fabric made of aramid fibers and a nonwoven fabric made of polyparaphenylene benzobioxazole fibers are wound in this order on the outer periphery of a metal roll to improve wear resistance and durability ( Patent Document 2).
On the other hand, a ringer roll has been developed in which a non-woven material is lined in a range where the strip edge passes and rubber is lined in the other strip passing plate range (Patent Document 3).

JP-A-5-254444 JP 2000-64014 A Japanese Patent Laid-Open No. 11-277129

However, in the case of a roll coated with rubber, since the frictional force between the rubber and the belt-like body is small, when the tension at the time of conveyance is approximately 19.6 N / mm ² (2.0 kgf / mm ² ) or less, The band may slip. In particular, when a rubber-covered roll is used in the belt meandering correction device, if the roll and the belt slip, the meandering correction cannot be performed sufficiently. Further, when a rubber-covered roll is used in a high-temperature environment such as in a furnace, pores existing between the metal roll core and the rubber lining may expand, and the roll surface may swell. When the roll surface swells, a convex portion is formed on the roll surface, and when the belt-like body is conveyed using this roll, the convex portion is transferred to the belt-like body. Further, the rubber surface is damaged at the edge of the belt-like body, and the usable period is shortened.
On the other hand, although a nonwoven fabric is hard to be damaged compared with rubber, there exists a problem that fixation with a metal roll core is difficult. For example, in the case of the technique described in Patent Document 1, although the hook-like material and the non-woven fabric are engaged, the sheet is attached to the roll surface with an adhesive or the like. If used, the sheet may be peeled off. Further, since the sheet itself is made of paper or a plastic film, the durability of the sheet is poor when used in a high temperature environment or in a liquid. When the nonwoven fabric is idled away from the roll, the strip passing speed and the rotational speed of the nonwoven fabric are not synchronized with each other, so that the surface of the strip is scratched.

  That is, the present invention has been made to solve the above-described problems. The nonwoven fabric sheet is wound around the surface to increase the frictional force between the belt-shaped body and the nonwoven fabric sheet is securely attached to the roll core via the rubber lining layer. An object of the present invention is to provide a covering roll fixed to a belt and a belt-like body conveying apparatus using the same.

The coated roll of the present invention includes a metal roll core, a rubber lining layer coated on the surface of the roll core, and a nonwoven fabric sheet wound around the rubber lining layer.
If it does in this way, a nonwoven fabric sheet will adhere to a rubber lining layer and it will prevent that a nonwoven fabric leaves | separates from a roll and idles. Further, since the rubber lining 4 is firmly fixed to the surface of the roll core by vulcanization or the like, the rubber lining 4 is not peeled off when used in a high temperature environment or in a liquid, and accordingly in a high temperature environment or in a liquid. The use of this prevents the nonwoven fabric sheet from coming off.
And the nonwoven fabric sheet used as the outermost surface of a coating | rolling roll has higher frictional force than a rubber lining layer, and can prevent the slip with a strip | belt-shaped body. In addition, the nonwoven fabric sheet is less susceptible to damage than the rubber lining layer, and even if foreign matter adheres, the nonwoven fabric sheet is buried in the nonwoven fabric sheet, so that the band-shaped body is hardly damaged.

The nonwoven fabric sheet preferably contains 80% by mass or more of aramid fibers.
If it does in this way, since many aramid fibers excellent in heat resistance are contained in a nonwoven fabric sheet, the heat resistance of a coating roll will also improve.

The belt-like body conveyance device of the present invention uses the coating roll, and the tension of the belt stretched on the coating roll is 127.4 N / mm ² or less.
If it does in this way, since the frictional force of a nonwoven fabric sheet is high, even if it uses a coating roll for the conveyance roll of a part with low conveyance tension, it becomes difficult to produce slip between strip | belt-shaped bodies.
The conveying device may be a meandering correction device for the belt-like body.

  According to the present invention, it is possible to obtain a coated roll in which a nonwoven fabric sheet is wound around the surface to increase the frictional force between the strip and the nonwoven fabric sheet is securely fixed to the roll core via a rubber lining layer.

It is a partial fracture perspective view showing covering roll 10 concerning an embodiment of the present invention. It is a perspective view which shows an example of the meandering correction apparatus of a strip | belt shaped body.

Hereinafter, a covering roll according to an embodiment of the present invention and a belt-like body conveyance device using the same will be described.
FIG. 1 is a partially broken perspective view showing a coating roll 10 according to an embodiment of the present invention. The covering roll 10 includes a metal roll core 2, a rubber lining layer 4 coated on the surface of the roll core 2, and a nonwoven fabric sheet 6 wound around the rubber lining layer 4.
The metal roll core 2 has a cylindrical shape, and a shaft 2a is attached to the center. The roll core 2 can be made of steel, stainless steel, aluminum or the like, but is not limited thereto, and various metals and alloys can be used. The outer diameter of the roll core 2 is not particularly limited, but can usually be about 50 to 1000 mm.
In addition, in order to improve the adhesiveness with the rubber lining layer 4, the surface of the roll core 2 may be treated with a known primer or the like.

The rubber lining layer 4 adheres firmly to the surface of the roll core 2 and is securely fixed, and the nonwoven fabric sheet 6 is securely fixed to the roll core 2 by being in close contact with the nonwoven fabric sheet 6 so that the nonwoven fabric is separated from the roll. To prevent idling. The rubber lining layer 4 is vulcanized or fixed to the surface of the roll core 2 with a predetermined adhesive, or the material to be the rubber lining layer 4 is poured onto the surface of the roll core 2 and cured by vulcanization, condensation, etc. Layer 4 can be formed. In any case, the rubber lining layer 4 is in close contact with the surface of the roll core 2.
The material of the rubber lining layer 4 is not particularly limited. For example, acrylonitrile / butadiene copolymer (NBR), polychloroprene (chloroprene rubber), ethylene / propylene terpolomer (EPT), polysiloxane (silicone rubber), Examples thereof include isopropylene / isobutylene copolymer (IIR), styrene / butadiene copolymer (SBR), polyurethane (urethane rubber), chlorosulfonated polyethylene (CSM), and fluorinated hydrocarbon (fluororubber). In particular, use of polysiloxane (silicone rubber), chlorosulfonated polyethylene (CSM), or fluorinated hydrocarbon (fluororubber) having high heat resistance is preferable for applications requiring heat resistance.
The thickness of the rubber lining layer 4 is not particularly limited, but can usually be about 3 to 30 mm.

As the nonwoven fabric sheet 6, a flat sheet may be wound around the rubber lining layer 4 and the seam portion may be sewn, but a tubular seamless type nonwoven fabric sheet 6 having an inner diameter slightly larger than the outer diameter of the rubber lining layer 4 is used. And preferred. When using the seamless nonwoven fabric sheet 6, the nonwoven fabric sheet 6 is placed on the outer side of the rubber lining layer 4, and then heated (shrunk) with water vapor or the like to make the nonwoven fabric sheet 6 adhere to the rubber lining layer 4. Can do.
Although it does not restrict | limit especially as a fiber used for the nonwoven fabric sheet 6, It was excellent in heat resistance, such as a para type | system | group and a meta-type aramid fiber, a polyarylate fiber, PBO fiber, carbon fiber, a polyphenylene sulfide (PPS) fiber, a polyimide fiber, a fluorine fiber. It is preferable to use one or more of the fibers because the coating roll of the present invention can be applied in a high temperature environment (150 to 250 ° C.) such as an annealing furnace. Moreover, you may manufacture the nonwoven fabric sheet 6 by mixing these fibers and another fiber.
The production method of the nonwoven fabric sheet 6 is not particularly limited, and can be selected from known production methods. For example, a chemical bond method, a spun bond method, a melt blow method, a needle punch method, a spun lace method, or the like can be used.

The thickness of the nonwoven fabric sheet 6 is not particularly limited, but can usually be about 3 to 30 mm.
In the present invention, as described above, the nonwoven fabric sheet 6 is brought into close contact with the rubber lining layer 4 using the high frictional force of the rubber lining layer 4 to prevent idle rotation with the roll. On the other hand, if two or more layers of nonwoven fabric sheets are laminated, the nonwoven fabric sheets 6 may slip and idle in the laminated portion.
Further, the extra length portion 6 a of the nonwoven fabric sheet 6 extends outward from the axial end portion of the roll core 2, and the extra length portion 6 a is sewn with the sewing thread 8 so that the extra length portion 6 a wraps the end portion of the roll core 2. Good. If it does in this way, it can prevent that the nonwoven fabric sheet 6 remove | deviates to the axial direction of the roll core 2. FIG.

As described above, the surface of the metal roll core 2 is covered with the rubber lining layer 4, and the nonwoven fabric sheet 6 is wound around the rubber lining layer 4, so that the nonwoven fabric sheet 6 adheres to the rubber lining layer 4 and the nonwoven fabric is -Prevents idle running away from the wheel. Further, since the rubber lining layer 4 is firmly fixed to the surface of the roll core 2 by vulcanization or the like, the rubber lining layer 4 is not peeled off due to use in a high temperature environment or in a liquid. The use of the liquid in the liquid prevents the nonwoven fabric sheet 6 from coming off. Further, even if pores in the rubber lining layer 4 swell under high temperature environment and a convex portion is formed on the surface of the rubber lining layer 4, the convex portion is relaxed by the nonwoven fabric sheet 6, and the convex portion is transferred to the belt-like body. It is prevented.
And the nonwoven fabric sheet 6 used as the outermost surface of a coating roll has a higher frictional force than the rubber lining layer 4, and can prevent the slip with a strip | belt-shaped body. Further, the nonwoven fabric sheet 6 is less likely to be damaged than the rubber lining layer 4, and even if foreign matter adheres, the nonwoven fabric sheet 6 is buried in the nonwoven fabric sheet 6, so that the belt-like body is hardly damaged.

In particular, since the non-woven fabric sheet 6 has a high frictional force, it is preferably used for a transport roll in a portion where the transport tension is low. Specifically, it is preferable to apply the coating roll of the present invention to a portion where the tension of the belt-like body stretched on the roll is 127.4 N / mm ² or less. The tension is more preferably of the belt or less 19.6 N / mm ^2, more preferably not more than 9.8 N / mm ^2, and most preferably not more than 4.9 N / mm ^2. On the other hand, the lower limit of the tension of the strip is usually about 0.098 N / mm ² .
Although the strip | belt-shaped body which can apply the coating roll of this invention is not specifically limited, For example, the board or foil of metals or alloys, such as copper, aluminum, and steel, is mentioned.

The coating roll of this invention can be used for the conveying apparatus of all the strip | belt-shaped bodies. Here, the belt-shaped body conveying device may be any device that stretches the belt-shaped body on a roll and conveys it.
In particular, it is preferable to use the coating roll of the present invention for a meandering correction device for a belt-like body, since the meandering can be corrected with certainty.

FIG. 2 is a perspective view showing an example of the belt meandering correction device. The meandering correction device 100 includes two covering rolls 10 arranged in parallel, a base 101 that pivotally supports the covering roll 10, and a base movement device 103 such as a hydraulic cylinder that moves the base 101 in the axial direction of the covering roll 10. And a detector 105 that detects a position in the width direction of the belt-like body 50 that is stretched and conveyed by the covering roll 10.
The belt-like body 50 is conveyed from the opposite side (upper side in FIG. 2) of the gantry 101 with the coating roll 10 interposed therebetween, and is stretched on one coating roll 10, and is stretched on the other coating roll 10 in parallel with the gantry 101. After that, it is conveyed to the opposite side of the gantry 101 (upper side in FIG. 2). The gantry 101 is pivotally supported at a predetermined pivot point and rotates along the axial direction of the coating roll 10 around the pivot point.
The detectors 105 are disposed at both ends of the strip 50 in the width direction. Each detector 105 includes a light projector and a light receiver, and the light projector and the light receiver are separated from each other while sandwiching the belt-like body 50 in the thickness direction. When the belt-like body 50 meanders in the axial direction of the covering roll 10, the amount of light received by each light receiver changes, so that the amount of meandering can be obtained.

And when the strip | belt-shaped body 50 meanders, if the mount frame moving apparatus 103 is advanced and retracted and the mount frame 101 is rotated around the pivot point so that the received light quantity of each light receiver will become the same, the strip | belt-shaped body 50 will become the covering roll 10's. Move in the axial direction and correct its meandering.
By using the coating roll of the present invention as the roll of the meandering correction device 100, even when the tension of the belt-like body is low, there is little slippage with the belt-like body, and the meandering can be reliably corrected.

  It goes without saying that the present invention is not limited to the above-described embodiment, but extends to various modifications and equivalents included in the spirit and scope of the present invention. For example, the coating roll of this invention can also be used in liquids, such as a pickling apparatus and a rust preventive coating apparatus. Since the coating roll of the present invention increases the frictional force between the belt-like body even in the liquid, the sliding with the belt-like body is reduced, and the durability is excellent even when used in the liquid.

A coating roll 10 shown in FIG. 1 was used to form a copper roll (phosphor bronze, thickness 0.1 mm, width 600 mm) at room temperature and in a high temperature atmosphere (about 230 ° C.). The outer diameter of the steel roll core 2 was 265 mm, and chlorosulfonated polyethylene (CSM) having a thickness of 17.5 mm was used as the rubber lining layer 4. And the nonwoven fabric sheet 6 of thickness 10mm which consists of a fiber shown in Table 1 was wound around the rubber lining layer 4. FIG. The thickness of the fibers constituting the nonwoven fabric sheet 6 was 2 to 3 denier (about 14 μm to 17.5 μm), and the density of the nonwoven fabric sheet 6 was 0.30 to 0.38 g / cm ³ . Here, 1 denier is the fineness when the mass is 450 mg and the mass is 50 mg.
Then, after covering the outer side of the rubber lining layer 4 with a cylindrical seamless type nonwoven fabric sheet 6 having a slightly larger inner diameter than the outer diameter of the rubber lining layer 4, the rubber lining layer 4 is heated and compressed (shrink) with water vapor. The nonwoven fabric sheet 6 was stuck to the. The extra length 6 a of the nonwoven fabric sheet 6 was extended outward from the axial end of the roll core 2, and the extra length 6 a was sewn with the sewing thread 8 so that the extra length 6 a wrapped the end of the roll core 2.
In addition, the tension | tensile_strength concerning the strip | line at the time of conveyance was 1.96 N / mm < ² >, and the strip | line was conveyed 4000 m. The roll wear was evaluated by visually observing the roll surface after 30 days of conveyance (200000-300000 m conveyance) with the tension applied to the strip being 1.96 N / mm ² .

As Comparative Example 1, a steel roll was similarly used as the transport roll.
As Comparative Example 2, a steel roll core 2 having a rubber lining layer 4 (CSM, thickness 17.5 mm) formed thereon was similarly used for a transport roll.
As Comparative Example 3, a rubber lining layer 4 (CSM, thickness 17.5 mm) was formed on a steel roll core 2 and the surface of the lining layer 4 was roughened, and was similarly used as a transport roll.
As Comparative Example 4, a steel taper roll having a parallel center in the axial direction and tapering toward the outside in the axial direction was similarly used as the transport roll.
As Comparative Example 5, a steel roll having a large number of holes opened on the surface thereof was similarly used as a transport roll.

The obtained results are shown in Tables 1 and 2.
In Table 2, the meandering amount is the maximum deviation [mm] from the axial center position of the roll when the same strip is conveyed at a line speed of 50 m / min. Moreover, evaluation (circle) shows that there are no evaluation items (for example, wear of a roll), evaluation x has evaluation items (for example, wear of a roll), and evaluation (triangle | delta) shows that there are few evaluation items (for example, wear of a roll).
The yarn press at a high temperature is a value obtained by measuring the number of non-woven fabric fibers adhering per 100 m of the strip when the strip is conveyed 4000 m in length in the above high temperature atmosphere. The life of the roll under high temperature was determined when a practically problematic scratch was generated on the roll or when the swelling of the roll was visually confirmed.

As is clear from Tables 1 and 2, in each example in which the roll core was covered with a rubber lining layer and the nonwoven fabric sheet was wound around the rubber lining layer, the amount of meandering of the strip was small, at high and normal temperatures. In all cases, there was no abrasion or scratches on the rolls, no creases, wrinkles, dents or scratches on the strips. Moreover, the nonwoven fabric sheet did not idle, and the roll did not swell even at high temperatures.
However, in Examples 4 to 8 in which the blending ratio of the meta-aramid fiber in the nonwoven fabric sheet is less than 80% by mass, the amount of thread pushing at a high temperature is large and the roll life at a high temperature is short compared to other examples. It was. This is because the polyester fibers in the nonwoven fabric sheet having poor heat resistance are deformed or melted at a high temperature, and the fibers (threads) frayed from the nonwoven fabric and adhered to the strips.
In Examples 4 to 8, the amount of meandering at a high temperature was about twice as large as that of the other examples. This is because the polyester fibers in the nonwoven fabric sheet having poor heat resistance are deformed or melted at a high temperature, and the stripes are slightly slippery.

In the case of the comparative example 1 which used the steel roll as it was, while the amount of meandering of a strip | line was large, since the roll was hard, the dent and the damage | wound were produced on the strip.
In Comparative Examples 2 and 3 in which the roll core was coated with a rubber lining layer, the amount of meandering of the strips was large, and the rolls were worn and scratched, resulting in dents on the strips. Further, the roll swelled at a high temperature, and the life decreased.
In the case of Comparative Example 4 using a steel taper roll, the amount of meandering of the strip was large, and because the roll was hard, dents and scratches were produced on the strip. In addition, creases and wrinkles occurred.
Also in the case of the comparative example 5 using a steel porous roll, while the amount of meandering of a strip was large, since the roll was hard, a dent and a crack were generated on the strip. In addition, in the case of the comparative example 5, the hole was obstruct | occluded with the metal oxide scattered in the annealing furnace used as high temperature atmosphere.

2 Roll core 4 Rubber lining layer 6 Non-woven fabric sheet 10 Covering roll 50 Band-shaped body 100 Belt-shaped body conveying device

Claims (4)

A coated roll comprising a metal roll core, a rubber lining layer coated on the surface of the roll core, and a nonwoven fabric sheet wound around the rubber lining layer. The said nonwoven fabric sheet is a coating roll of Claim 1 containing 80 mass% or more of aramid fibers. It is a strip | belt-shaped body conveyance apparatus using the coating roll of Claim 1 or 2, Comprising: The tension | tensile_strength of the said strip | belt body stretched by the said coating roll is 127.4 N / mm < ² > or less. 4. The belt-like body conveyance device according to claim 3, wherein the belt-like body is a meandering correction device.

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