JPH0685728B2 - Brush roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is for removing stains such as carbon and residual iron adhering to the surface of a steel sheet immediately after cold rolling. The present invention relates to a channel-type brush roll used in a brushing-type cleaning device.

(Prior art) When cold-rolled cold-rolled steel strip is annealed without degreasing, stains such as carbon and residual iron remain on the surface of the steel strip. In the pretreatment process, these stains are not removed, which becomes a factor of impairing the quality of the product.

Therefore, in order to degrease the cold-rolled steel strip after cold rolling, it has been common practice to pass this steel strip through a cleaning device equipped with a brush roll.

There are two types of brush rolls, a disc type and a channel type.

Disk type brush roll A whose appearance is shown in FIG.
Is a large number of discs 22 in which bristle material 21 is planted on the periphery.
Is made by axially fitting the shaft 23 in close contact with each other,
As a whole, it has a form in which the outer peripheral surface of a columnar body is planted. 22a is a shaft hole provided in the disk 22.

As shown in FIG. 4, the disk 22 is provided with a plurality of elongated holes 24 at equal intervals in the peripheral edge thereof, and small holes 25, 25 through which wires are inserted respectively adjacent to both ends of the elongated holes 24. Is provided.

As shown in FIG. 5, the bristles 21 are made by bundling three synthetic resin monofilaments 21a containing abrasives, and wrapping the synthetic resin filaments 21b around the outer periphery in a spiral shape over a predetermined length, It has a structure in which an adhesive is permeated and solidified in this winding position.

Then, as shown in FIG. 6, the hair material 21 cut into a predetermined length is inserted into each long hole 24 of the disk 22 and folded in two in the outer peripheral direction of the disk 22, and between the two small holes 25, 25. The bristle material 21 is planted on the outer peripheral edge portion of the disk 22 by being fixed with a wire 26 that has been hung.

On the other hand, in the channel type brush roll B whose structure is shown in FIG. 7, a long channel material 32 having a U-shaped cross section in which a bristle material 31 is planted in its groove is provided on the outer peripheral surface of the shaft 33. It is made by tightly winding while exerting a certain tension.

(Problems to be Solved by the Invention) The brush roll used in the above-described cleaning device is not only provided with a polishing function for removing dirt and a cleaning function for wiping / removing dirt that has been dropped, but is also highly durable, and , It is required to be as cheap as possible.

In response to such demands, a disc type brush roll A
Because the bristle materials 21 planted in the adjacent disks 22, 22 are likely to be intertwined with each other, the bristle material 21 is evenly distributed over the entire outer peripheral surface of the brush roll A,
Polishing without "uniformity" can be performed. Further, it has an advantage that there is little possibility of causing a hair splitting phenomenon due to the edge portion of the material to be polished.

However, on the other hand, it takes a lot of time to make a composite-structured bristle material 21 in which the monofilaments 21a are bundled as described above, and it takes much more labor to attach the bristle material 21 to the disc 22, and further, Since the step of fitting a large number of discs 22 onto the shaft 23 is added, the completed brush roll A is inevitably expensive.

On the other hand, the conventional channel-type brush roll B can be made much cheaper than the disc-type brush roll A due to its structure, but since the plate thickness portions of both side walls of the channel 32 lack the bristle material 31, The bristle material 31 is unevenly distributed on the outer peripheral surface of the roll B, which easily causes cleaning marks such as brush marks or uneven cleaning on the material to be polished.

Therefore, it was difficult to use it for a cold-rolled steel strip cleaning device that requires strict quality control.

Therefore, an object of the present invention is to provide a channel-type brush that can be manufactured at low cost, has no fear of causing cleaning defects, and can be reliably adopted also in a cold-rolled steel strip cleaning device that requires strict quality control. To serve the roll.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the brush roll according to the present invention comprises a first bristle material 2A made of a synthetic resin monofilament containing an abrasive and a synthetic resin. 20W% -80W% vs. 80W% -2 with the second hair material 2B made by twisting a number of ultrafine filaments
The mixed bristle material 2 mixed at a ratio of 0 W% was planted in a groove of a long channel 3 in a brush shape, and the channel 3 was tightly wound around and fixed to the outer peripheral surface of the shaft 4.

As the first bristle material 2A, for example, a nylon monofilament mixed with abrasive grains such as alumina is used.
As the bristle material 2B, for example, a multifilament in which a large number of ultrafine nylon filaments inside and outside 30 μ are twisted together may be used.

The second bristle material 2B is preferably impregnated with a synthetic resin for the purpose of increasing its rigidity.

(Operation) The brush roll 1 is installed in, for example, a brushing-type cleaning device that removes dirt adhering to the surface of a steel strip that has been rolled between cases, and the brush roll 1 is rotated at a predetermined speed while the steel is being rolled. When pressed against the surface of the band, the first bristle material 2A having an appropriate rigidity and containing an abrasive material surely removes the dirt on the surface to be polished.

On the other hand, the second bristle material 2B having an appropriate flexibility pushes the first bristle material 2A in a random direction by pressing its tip against the surface to be polished and bending in a random direction, Differently from the conventional channel type brush roll B, the effect that the bristle material distribution on the outer peripheral surface of the brush roll is naturally equalized occurs.

Then, the dirt removed from the surface to be polished by the first bristle material 2A is surely wiped by the second bristle material 2B having a high flexibility. Moreover, the second bristle material 2B, which is in a state of being close to the first bristle material 2A, also plays a role of preventing the first bristle material 2A from being excessively bent and deformed.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

The structure of the channel type brush roll 1 according to the present invention is substantially the same as that of the conventional brush roll B, and as shown in FIGS. 1 and 2, the channel 3 in which the mixed bristle material 2 is planted in the groove thereof is used.
Is tightly wound and fixed over substantially the entire length of the outer peripheral surface of the shaft 4 having a predetermined outer diameter and length.

By the way, the mixed bristle material 2 uses two kinds of bristle materials 2A and 2B of the first and second types, which is different from the conventional channel type brush roll which uses a single synthetic resin monofilament. .

As the first bristle material 2A, a synthetic resin monofilament containing an abrasive is used, and as the second bristle material 2B, a multifilament in which a large number of ultrafine synthetic resin filaments are twisted together is used.

The first bristle material 2A used in this embodiment is a nylon 612 monofilament having a diameter of about 0.4 mm, and the spinning raw material thereof contains commercially available alumina-based abrasive grains as in the prior art. .

In this embodiment, the second bristle material 2B is formed by twisting about 410 nylon 6 extra fine filaments having a thickness of about 27μ and averaging them.
A multi-filament bundled into 0.65 mmφ is used. This multifilament has an appropriate rigidity as a brush material, and is impregnated with a synthetic resin so that only the tip portion of the bristle material 2B is easily loosened.

Then, in this embodiment, the first bristle material 2A and the second bristle material 2B
And each are cut to a length of about 100 mm, and the weight ratio is 50
By mixing in a ratio of 50, a brush having rigidity and flexibility most suitable for cleaning cold-rolled steel strip was obtained.

Channel 3 is a long strip steel plate with a width of 24 mm and a thickness of 1 mm.
Each side is bent to have a U-shaped cross section of 8 mm.

In FIG. 1, in order to facilitate understanding of the structure of the mixed bristle material 2, the thickness of the mixed bristle material 2 is drawn to be significantly thicker than it actually is.

In this case, the shaft 4 has an outer diameter of about 23 cm and an effective length of about 185 cm as a brush roll, and the finished brush roll 1 has an outer diameter of about 33 cm.

The method of manufacturing the brush roll 1 using each of these constituent materials 2 to 4 is the same as that of the above-mentioned conventional technique.

Next, the operation of the above configuration will be described.

After the brush roll 1 is assembled to a cold-rolled steel strip cleaning device (not shown), it is rotated at a predetermined speed and brought into pressure contact with the surface to be polished. Hair material
By 2A, dirt on the surface to be polished can be reliably removed without scratching the surface to be polished. At that time, the second bristle material 2B, which is close to the first bristle material 2A, plays a role of preventing excessive flexural deformation of the first bristle material 2A.

On the other hand, the second bristle material 2B having an appropriate flexibility is bent in a random direction by pressing the tip of the second bristle material 2 against the surface to be polished and pushes the first bristle material 2A in a random direction. The disadvantage of the conventional channel-type brush roll B, that is, the big problem that the distribution of the bristle material is locally sparse in the thickness portion of the side wall of the channel 32, is solved, and the brush mark is formed on the surface to be polished. There is no fear of it occurring.

Then, the dirt separated from the surface to be polished by the first bristles 2A is surely wiped and removed from the surface to be polished by the second bristles 2B having high flexibility.

In the above embodiment, when the density of the mixed bristle material 2 to be planted in the groove of the channel 3 is about 300 g per 1 m of the channel 3, the balance between rigidity and flexibility or flexibility is the most. A good brush roll 1 was obtained.

Also, various tests were conducted on the desirable mixing ratio of the first bristle material 2A and the second bristle material 2B, and the ratio of the first bristle material 2A to the second bristle material 2B was 20W. % Or less, the rigidity of the entire mixed bristle material 2 becomes too weak, and sufficient cleaning performance cannot be obtained. Conversely, if it is 80 W% or more, the rigidity becomes too high.
The surface to be polished is likely to have cleaning flaws, and the second bristles 2B
It was found that the effect of wiping dirt off the surface to be polished and the effect of evenly dispersing the first bristle material 2A as described above weakened conspicuously.

Next, the quality control of the brush roll 1 of the above-mentioned embodiment and the conventional brush rolls A and B is strictly required.
Table 1 shows the results of experiments in which the steel sheets after cold rolling were mounted on an electrolytic cleaning line for cleaning and their performances were compared.

The operating conditions of this electrolytic cleaning line were set as follows.

a) Number of brush steps in the brushing section 4 steps b) Brush rotation speed 900 rpm c) Spray cleaning method with hot water at 90 ° C d) Size of steel plate to be cleaned Thickness 0.2 to 2.3 mm Width 500 to 1600 mm e) Line speed maximum 300 m / min In this table, the cost and the life are relative values when the conventional brush roll A is 1, respectively.

Thus, the channel-type brush roll 1 according to the present invention
Is a serious drawback of the conventional channel-type brush roll B, there is no fear of cleaning flaws, and yet it has the advantage of the brush roll B, that is, the low manufacturing cost. As a result, it was proved that the excellent performance of the brush roll 1 was obtained because the result was that the property was equal to or higher than that of the conventional brush rolls A and B.

In the above embodiment, the synthetic resin used as the constituent material of the mixed bristle material 2 is not limited to nylon, and any synthetic resin having physical or mechanical characteristics equal to or higher than nylon can be used for the purpose of the present invention. Can be used effectively. The materials of the bristle materials 2A and 2B do not have to be the same, and plural kinds of bristle materials made of plural kinds of materials may be mixed.

Further, the thickness of the bristle material 2A, the thickness of the ultrafine filaments forming the bristle material 2B and the number of bundled filaments, the length of the mixed bristle material 2 and the like are not limited to the above-mentioned examples, and the abrasive material is an alumina-based abrasive. Various commercially available abrasives other than grains can be used.

Further, the brush roll 1 according to the present invention exhibits its cleaning ability even when used in various cleaning equipment attached to continuous annealing equipment, surface treatment equipment and the like.

[Effects of the Invention] As is clear from the above description, the channel type brush roll according to the present invention has, as the bristle material, the first bristle material made of a synthetic resin monofilament mixed with an abrasive and a large number of ultrafine composite materials. By using the second bristle material composed of the multifilament made by twisting the resin filaments together, the following excellent practical effects are achieved.

(A) Since the channel type brush roll has a simple structure, it can be manufactured at a sufficiently low cost.

(B) Of course, the problem of uneven distribution of the bristle material on the surface of the brush roll, which is a major drawback of the conventional channel type brush roll, does not occur, and therefore, the surface to be polished has cleaning flaws or uneven cleaning. There is no fear of this occurring.

(C) By appropriately changing the types and mixing ratios of the first and second bristle materials, the balance between the rigidity and the flexibility of the mixed bristle material can be widely changed so as to meet various cleaning conditions. You can

[Brief description of drawings]

1 and 2 show an embodiment of the present invention.
FIG. 1 is a schematic perspective view showing a vertical cross section of a channel in which a mixed bristle material is implanted, and FIG. 2 is a perspective view showing a manufacturing process of a brush roll. FIGS. 3 to 6 show a conventional disc type brush roll. FIG. 3 is a partial perspective view, FIG. 4 is a partial plan view of a disc, and FIG. 5 is a cross-sectional view of a bristle material. FIG. 6 is a partial perspective view, and FIG. 6 is a partial plan view showing a state in which a bristle material is attached to the disk. FIG. 7 is a perspective view illustrating a manufacturing process of a conventional channel type brush roll. Code table 1 ... Brush roll, 2 ... Mixed bristle material 2A ... First bristle material, 2B ... Second bristle material 3 ... Channel, 4 ... Shaft A ... Conventional disc type brush roll B …… Conventional channel type brush roll 21,31 …… Bristles 21a …… Synthetic resin monofilament 21b …… Synthetic resin filament 22 …… Disk 23,33 …… Shaft, 22a …… Axial hole 24 …… Elongated hole , 25 …… Small hole 26 …… Wire, 32 …… Channel

Claims (3)

[Claims] 1. A first bristle material 2A made of a synthetic resin monofilament containing an abrasive and a second bristle material 2B made by twisting a large number of ultrafine filaments of a synthetic resin, 20 W% to 80 W.
% Mixed with 80% to 20W% of the mixed bristle material 2 in the shape of a brush in the groove of the long channel 3, and the channel 3 is tightly wound around the outer peripheral surface of the shaft 4 and fixed. A channel-type brush roll having the above structure. 2. The first bristle material 2A is, for example, a nylon monofilament in which abrasive grains made of alumina or the like are mixed, and the second bristle material 2B is, for example, a large number of ultrafine nylon filaments inside and outside 30 μ. The channel type brush roll according to claim 1, which is a multifilament twisted together. 3. The channel according to claim 1 or 2, wherein the second bristle material 2B is impregnated with a synthetic resin in order to appropriately increase the rigidity thereof. Formula brush roll.