KR100879254B1 - Brushing apparatus for rubbing cloth - Google Patents

Abstract

A brushing apparatus for rubbing cloth is provided to regularizing the direction and upstanding characteristics of the rubbing cloth. A belt(110) comprising the brush device is rolled with a plurality of pulleys(131, 132, 133, 134) and it is rotated. The belt is rotated while being comprised 45° or 90° in the oblique direction of the rubbing cloth, that is, the progressive direction of the rubbing cloth. The width of the rubbing side line(111) in which the brush hair part which There is a friction between and the rubbing cloth is equipped is comprised so that it is the same as that of the width of the rubbing cloth or the width be broad. A driving pulley(131) moves according to the prescribed trajectory in the whole length range of the belt top and bottom and the width of the rubbing side line is controlled. A brush hair part rubs with the rubbing cloth(10) while circulating with the belt.

Description

Brushing Apparatus for Rubbing Cloth

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brush device, and more particularly, to a rubbing cloth brush device used for manufacturing a rubbing cloth for a liquid crystal display device.

In general, during the LCD manufacturing process, a rubbing process is performed to obtain a uniform and controllable effect of liquid crystal molecules.

In the above-described rubbing process, a rayon or nylon-based fiber is woven into pile yarns of warp and weft yarns, and the woven fabric is wound on the rubbing rollers 1, and then the rubbing rollers 1 are rotated to form an alignment layer on a substrate. It is done by rubbing.

1 and 2, the rubbing roller 1 performs the rubbing process while moving in one direction from the top of the alignment layer 2 simultaneously with the rotation.

In this process, the pile yarn 13 of the rubbing cloth 10 comes into contact with the alignment film 3 on the substrate 2 to rub the surface of the alignment film, thereby uniaxially having a predetermined level or more on the alignment film 3. A series of alignment grooves (not shown) are formed having a uni-directional alignment and a range of pretilting angles.

The alignment layer 3 is formed by applying an alignment layer raw material solution made of polyamic acid, soluble polyimide, etc. onto the substrate 2 and then performing a pre-cure process at about 60 to 80 ° C. and a main at about 180 to 200 ° C. It is formed by going through a main-cure process.

More specifically, the alignment film raw material solution made of the polyamic acid, the soluble polyimide, or the like is insoluble polyimide by the above-described pre-cure process and the main curing process, and the alignment film 3 To form.

As described above, the rubbing device for forming the alignment groove includes a rubbing roller 1 on which the rubbing cloth 10 is wound and a stage 4 on which the substrate is placed, as described above.

The stage 4 has a plurality of vacuum suction holes (not shown) for adsorbing the bottom surface of the substrate 2 of the liquid crystal display device, and a plurality of report pins for loading or unloading the substrate onto the stage. (Lift Pins) are located.

When the substrate 2 is loaded into the stage 4, the rubbing roller 1 rotates and moves in one direction so as to be rubbed with the upper surface of the substrate, and the rubbing attached to the outer circumferential surface of the rubbing roller 1. An alignment groove is formed in the alignment film 3 of the substrate which rubs against the pile yarn 13 of the fabric.

The rubbing cloth 10 used in the rubbing process is a pile yarn 13 in a fabric structure consisting of a warp 11 and the weft yarn 12, as shown in FIG. It is woven into (not shown) to form. Then, the pile yarn 13 is brushed using a brush device, thereby giving uprightness and directionality to the pile yarn 13.

Existing general brush device comprises a cylindrical rotating roller and a plurality of stainless wires (steel needles) implanted in the rotating roller, while rotating in the same or reverse direction of the traveling direction (inclined direction) of the rubbing cloth The rubbing cloth is brushed in an inclined direction, and this brush device is called an inclined direction brush.

The brush device for brushing the rubbing cloth while advancing in the direction perpendicular to the moving direction of the rubbing cloth, that is, the weaving direction of the rubbing cloth is referred to as a weft direction brush. These weft direction brushes are mainly used to improve the fidelity of the pile, or to make the direction of the pile perpendicular to the advancing direction of the fabric.

On the other hand, in the case of the inclined brush rotates in the forward or reverse direction and the direction of the fabric and friction with the pile, the frictional load applied to the brush is not greater than the weft direction brush. However, in the case of the weft direction brush, the frictional load applied to the brush becomes very large by rotating in a direction perpendicular to the advancing direction of the fabric.

However, since the conventional weft direction brush has a configuration in which a plurality of stainless steel wires (hereinafter referred to as wire needles) in the shape of needles are inserted into the rubber belt, the tip of the needles is sharp and the rubbing cloth files are easily damaged.

In addition, when brushing the rubbing cloth conveyed in the inclined direction with a conventional weft direction brush in the weft direction, the wire needle is deformed by bending in one direction by the frictional load, so when the brushing treatment of the rubbing cloth in the opposite direction The wire needles deformed in one direction as described above will damage the fabric or pile yarn of the rubbing cloth.

Therefore, the conventional weft direction brush can brush the rubbing cloth only in one weft direction, and in order to brush the other weft direction, a separate weft direction brush is required. In other words, in order to provide uniform uprightness and directivity to the pile yarn of the rubbing cloth corresponding to the material and the characteristics of the rubbing cloth, a plurality of brush devices are required.

In addition, since the conventional weft direction brush uses a rubber belt, the rubber belt extends due to the friction load between the rubbing cloth and the weft direction brush, so that uniform brushing on the rubbing cloth cannot be performed, and particularly at high speed. When the brushing process is performed, such a problem occurs further.

Therefore, the orientation of the pile yarn brushed by the conventional weft direction brush is not given uniformly as a whole, and it becomes difficult to manufacture a rubbing cloth having a uniform directionality.

In particular, the above-described conventional weft direction brush is applied to a rubbing cloth for producing a large panel, but it is difficult to give uniform direction to the pile yarn of the rubbing cloth due to the above-mentioned problems, and thus is not suitable for the preparation of a rubbing cloth for manufacturing a large panel.

The present invention has been made to solve the above-described problems, an object of the present invention to provide a rubbing cloth brush device having a brushed portion capable of preventing or minimizing damage to the rubbing cloth when brushing and bi-directional brush processing, rubbing cloth file It is for making the directionality and uprightness of a uniform.

Another object of the present invention is to provide a brush device for rubbing cloth having a structure that is easy to maintain when replacement or repair, such as damage to the hair brush.

In order to achieve the above object, the present invention is a rubbing cloth brush device for brushing a rubbing cloth for a liquid crystal display device in a direction crossing the oblique direction, rubbing with the rubbing cloth for brushing the rubbing cloth, And bristles having any one of a material of a horse gun and synthetic fibers; And it provides a brush device for a rubbing cloth comprising a belt (belt) for the movement of the bristles.

Here, the belt is characterized in that it is installed to cross 45 ° to 90 ° in the inclined direction of the rubbing cloth.

The brush device for a rubbing cloth according to the present invention is fixed to an outer surface of the belt in a state spaced apart from each other, and further comprises a plurality of seedling plate in which the bristle part is planted.

And the plurality of seedlings are preferably detachably coupled to the belt.

The driving plates are fixed by pieces to the belt. In addition, the belt comprises a fabric belt.

According to the brush device for rubbing cloth according to the present invention described above has the following effects.

First, according to the brush device for rubbing cloth according to the present invention, the bristle part of the brush device is made of natural fiber material or synthetic fiber material such as pig hair or horsehair, so that the damage of the file compared to the wire cloth when brushing the rubbing cloth in the weft direction It can be minimized, bidirectional brush treatment is possible through the control of the rotation direction of the belt can be produced a good quality rubbing cloth.

Second, according to the brush device for a rubbing cloth according to the present invention, since the bristle part is planted on a separate seedling plate to be fixed to the belt, regardless of the material of the belt can be fixed simply and conveniently to the belt to brush the material of the belt Various changes can be made to the process conditions.

Third, according to the rubbing cloth brush device according to the present invention, the seedling plate to be planted in the brushed part is detachably fixed to the belt, so that if the part of the bristle part is damaged, there is no need to replace the entire belt, and only the corresponding tray is replaced. , Easy to maintain and repair.

Fourth, according to the brush device for rubbing cloth according to the present invention, since the belt is rotated while proceeding in the direction intersecting the inclined direction of the rubbing cloth is composed of a textile belt is minimized that the belt is stretched by the frictional load, the direction of the pile And uprightness can be controlled uniformly, and it is possible to produce rubbing cloths suitable for the production of high quality rubbing cloths and large panels.

Brush device for rubbing cloth according to the present invention is composed of a rotating belt and a bristle part circulating by the rotating belt and rubbing the rubbing cloth, the bristle part is made of a synthetic fiber, such as a pig hair or a horse gun or nylon, excellent directional control of the pile and bidirectional As a result, even though the brush treatment did not damage the rubbing cloth, the defect rate of the substrate during the rubbing process was reduced.

Hereinafter will be described in detail preferred embodiments of the present invention and a method for manufacturing the same that can specifically realize the above object.

In general, in the manufacturing process of the liquid crystal display device, the alignment is the most important technique to improve the display characteristics of the liquid crystal display device as well as the arrangement stability of the liquid crystal molecules.

Since the liquid crystal display is subjected to a high temperature treatment in the manufacturing process, a polyimide alignment film that withstands high temperature well and has excellent stability, durability, and productivity of alignment is used as an alignment film of various liquid crystal display devices. Generally, a solution for forming an alignment film is a polyamic acid solution, which is cured through drying, heating, and curing after coating on a substrate to form an alignment film of a polyimide thin film, and uniform and controllability of liquid crystal molecules with respect to the alignment film thus formed. The rubbing process is carried out to obtain the effect.

The rubbing cloth to which the present invention is applied is for forming fine alignment grooves in the alignment layer, and has a structure in which a rayon or cotton-based fiber is woven into a pile yarn in a fabric texture woven with warp and weft yarns.

Since the alignment grooves are formed by the pile yarns, in order to form finer alignment grooves, it is preferable that the density of the pile yarns is high and the fineness of the pile yarns is thin.

Here, the pile yarn is generally made of rayon or cotton yarn, these cellulose-based yarn is brushed by a brush device in the wet state to have an upright / directional.

Therefore, in the pile raising process of the pile yarn, the brush device is an important cause of failure of the pile evenness, that is, the upright and directionality of the pile yarn is formed unevenly or the alignment grooves are formed thereby.

On the other hand, as the liquid crystal display device becomes larger, a rubbing cloth that can cope with a large panel is required. The rubbing cloth weaving machine cannot produce a rubbing cloth having a width of 1500 mm or more due to mechanical limitations. Pile orientation should be given to suit large panels.

In order for the rubbing cloth to be suitable for a large panel, it is preferable to control the direction of the pile to be a direction intersecting the inclination direction that is the rubbing cloth traveling direction, in particular, a weft direction that is substantially perpendicular to the inclination direction. In order to use the weft direction brush device.

However, since the general weft brush device is manufactured in the form of a wire cloth cloth formed on the rubber belt as described above, brush processing is possible only in one direction due to the characteristics of the wire cloth, and the direction control force of the pile is low, Since stretching occurs, durability of the brush device is reduced, and the direction control of the pile is not uniform.

In addition, since the bristle part is directly implanted into the belt, it is difficult to change the material of the belt, and it becomes difficult to plant the bristle part made of synthetic fibers such as donmo, horsehair or nylon according to the rotational direction of the belt.

3a and 3b is a schematic view showing an example in which the brush device for rubbing cloth 100 according to the present invention is applied as a weft direction brush.

3A and 3B, the rubbing cloth 10 is brushed in the inclined direction and the weft direction by the inclined brush 50 and the weft brush 100, respectively.

The brush device 100 for a rubbing cloth according to the present invention is a brush device applicable to a weft direction brush, and is a device capable of brushing the rubbing cloth 10 in a direction intersecting the inclined direction of the rubbing cloth.

More specifically, the rubbing cloth is brushed in a direction intersecting with the advancing direction of the rubbing cloth, that is, in the intersecting direction, that is, in the oblique direction to impart an uprightness and directivity to the rubbing cloth pile.

To this end, the rubbing cloth brush device 100 is configured to include a belt 110 and a bristle portion 120, the belt 110 is the bristle portion (120) so that the bristle portion 120 is rubbed with the rubbing cloth ( It is a structure for moving 120). More specifically, the belt 110 is a rotating belt that circulates while traveling in a direction intersecting the inclined direction of the rubbing cloth 10.

And the bristle portion 120 of the brush device for rubbing cloth according to the present invention may be composed of natural fibers, such as pig hair and horsehair or synthetic fibers, such as nylon, the pig hair and horsehair is less deformable to heat than general synthetic fibers Compared to other materials, the bristles of the brush device of the rubbing cloth according to the present invention are suitable as the restoring property of the rubbing cloth is low and the deformation of the rubbing cloth is low.

Figure 4 is a front view showing an embodiment of a brush device for rubbing cloth according to the present invention, the belt 110 constituting the brush device is wound around the plurality of pulleys (131, 132, 133, 134) is configured to rotate do.

Here, the belt 110 is rotated to form a 45 ° to 90 ° in the inclined direction of the rubbing cloth, that is, the traveling direction of the rubbing cloth, the width of the friction side line 111 is provided with a bristle part rubbing with the rubbing cloth Is configured to be equal to or wider than the width of the rubbing cloth 10.

In the present invention, the belt 110 is configured to be rotatable in both directions to reduce the number of installation of the brush device by brushing the rubbing cloth 10 in one direction and the opposite direction. The belt 110 is rotated by the pulleys 131, 132, 133, and 134. When at least one of the pulleys includes a driving pulley 131 driven by the bidirectional rotation motor 140, The belt 110 is rotatable to one side and the other side.

On the other hand the belt 110 is preferably configured to be adjustable in width. In other words, it is possible to cope with the width change of the rubbing cloth 10 by enabling the width adjustment of the friction side line 111. To this end, in the present embodiment, one of the pulleys is configured to be movable to adjust the width of the belt to adjust the width of the belt.

More specifically, the driving pulley 131 is configured to be movable in the vertical direction within the entire length range of the belt 110 along a predetermined trajectory to adjust the width of the friction side line 111.

Next, the bristle part 120 is rubbed with the rubbing cloth 10 while being circulated by the belt 110. In the present embodiment, the bristle part 120 is formed through the seedling plate 150. It is fixed to the belt 110.

Referring to FIG. 5, the bristle part is planted on each of the platelets 150 and fixed to the belt, and a plurality of equations in which a bristle part 120 such as a donmo or a horse gun are planted on the front surface of the platelet 150. Pores (not shown) are formed. In the present embodiment, the grain plate 150 is made of an acrylic material, but the material is not limited thereto.

And the food plate 150 is preferably detachably coupled to the belt (110). This is because when the bristle part 120 is damaged or depilated, the platelets 150 having the damaged or depilated hair loss part are separated from the belt to facilitate maintenance / repair or replacement.

To this end, in the present embodiment, the planting plate 150 is configured to be screwed to the belt 110, and more specifically, a fastening hole (not shown) is formed on the rear surface of the planting plate 150, so The cloth plate 150 is fixed to the belt 110 by a fastening member such as a piece. Accordingly, the piece penetrates outward from the inner surface of the belt 110 to be coupled to the fastening hole of the cultivation plate 150, thereby fixing the cultivation plate 150 and the belt 110 to each other. The fastening hole is preferably formed at least two places in a line along the rear center of the seedling plate 150.

Of course, the fastening member for fixing the belt 110 and the seedling plate 150 is not limited to the above-described piece.

Forming plate 150 is configured as described above are provided in plurality on the outer surface of the belt 110, the plurality of leaf plate 150 is disposed in a state separated from each other to prevent the degradation of the flexibility of the belt (110). And smooth rotation.

On the other hand, the belt 110 is made of a textile material to lower the elongation rate compared to the conventional rubber-based belt to prevent or minimize the elongation of the belt due to the friction load to uniformity of the pile upright and directional during brushing process have. That is, the belt of the brush device according to the present invention may be configured to include an unstretched fabric belt or may comprise a steel belt such as a steel belt.

As described above, according to the brush device according to the present invention, the bristle part 120 is firmly planted on a separate platen plate 150 and fixed to the belt 110 through the platen plate 150. Excellent stability and durability of the bristles, the bristle portion 120 is composed of synthetic fibers such as pig hair, horsehair or nylon enables bi-directional rotation and high-speed rotation to uniformly control the direction of the pile.

Hereinafter, various embodiments of the rubbing cloth brushed by the brush device according to the present invention will be described and compared with other comparative examples brushed by the conventional brush device. However, the following examples are merely illustrative of the present invention, the present invention is not limited to the following examples.

Example 1

Plain weave with inclination density 60 / inch and weft density 120 / inch using ramp cupra ammonium rayon filament 120d / 75f (Asahi 産, Japan) Woven fabric tissue was used. Using a viscose rayon filament 100d / 40f (Enka®, Germany) as a pile yarn, the fabric was woven into a W shape by a known pile loom so as to have a pile density of 32,000ea / cm 2. The pile fabric thus prepared was refined by a known process to resin treatment, and brushed using a brush apparatus according to the present invention. At this time, the brush device is a device that the bristle material bristles are planted on the seedling plate attached to the belt, belt width (a) of Figure 6 100mm, seedling plate width (b of Figure 6) 30mm, seedling section (c of Figure 6; The width of the seedlings are planted) 22mm, the thickness of the piglets 28mm, the seedling plate gap (d in Fig. 6) 2mm was used, 5 forward rotation, 5 reverse rotation was brushed. At this time, the rotation direction can be freely changed according to the direction of the file to be given to the rubbing cloth.

Example 2

Using the same fabric as in Example 1, the resin was refined by a known process and subjected to a brush treatment using the brush device according to the present invention. Here, the brush device is a device that the bristle material of the bristle material is planted on the seedling plate attached to the belt, the belt width 150mm, seedling plate width 30mm, seedling section 22mm, bristle thickness 28mm, seedling plate spacing 2mm, the forward rotation Brush processing was carried out using five and five reverse rotations. At this time, the rotation direction can be freely changed according to the direction of the file to be given to the rubbing cloth.

Comparative Example 1

Plain weave with inclination density 60 / inch and weft density 120 / inch using ramp cupra ammonium rayon filament 120d / 75f (Asahi 産, Japan) Woven fabric tissue was used. Using a viscose rayon filament 100d / 40f (Enka®, Germany) as a pile yarn, the fabric was woven into a W shape by a known pile loom so as to have a pile density of 32,000ea / cm 2. The pile fabric thus prepared was refined by a known process to resin treatment, and brushed using a conventional wire impregnation brush device. At this time, the brush device uses a belt type weft direction brush in which wire needles are implanted in a known belt, and a belt width of 100 mm and a wire length of 20 mm is formed in a dot shape at intervals of 10 mm. Five rotations were used to brush.

The rubbing cloths prepared according to the comparative examples and examples described above were compared and evaluated in the manufacturing process of the IPS type liquid crystal display device as shown in Table 1 below.

* Standard deviation of pile direction: The fibrous direction was measured by the vibration trajectory method at 30cm intervals in the direction of inclination of the rubbing cloth fabric.

* Process defective rate: The liquid crystal display device of the IPS method was manufactured, and the vertical line defect rate in the liquid crystal display device manufacturing process was compared and shown.

division Comparative Example 1 Example 1 Example 2 Brush hair material Wire saber Money Money Belt width (mm) 100 100 150 Direction of rotation One-way Bidirectional Bidirectional Pile Directional Standard Deviation (°) 12 5 3 Defective rate of process (vertical line,%) 9 4 One

As mentioned above, according to the brush apparatus which concerns on this invention, compared with the comparative example 1, it turns out that Example 1 and 2 are all excellent in process defect rate and pile orientation.

As described above, the preferred embodiments of the present invention have been described, and the fact that the present invention can be embodied in other specific forms in addition to the above-described embodiments without departing from the spirit or scope thereof has ordinary skill in the art. It is obvious to them.

Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and thus, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

1 is a cross-sectional view schematically showing a general rubbing device.

Figure 2 is a perspective view showing an embodiment of a general rubbing cloth.

3a and 3b is a schematic view showing an example in which the brush device for rubbing cloth according to the present invention is applied to the weft direction brush

Figure 4 is a front view showing an embodiment of a brush device for rubbing cloth according to the present invention

Figure 5 is a perspective view showing a seedling plate and a brushed portion implanted in the brush device for a rubbing cloth according to the present invention

Figure 6 is a plan view showing a state where the driving plate of the brush device for rubbing cloth according to the present invention is installed on the belt

Explanation of symbols on the main parts of the drawings

1: rubbing roller 10: rubbing cloth

11: tilt 12: weft

13: file yarn 100: brush device

110: belt 120: brushed hair

131, 132, 133, 134: pulley

140: drive motor 150: drive plate

Claims (6)

A rubbing cloth brush device for brushing a rubbing cloth for a liquid crystal display device in a direction crossing the oblique direction, A brush part which rubs with the rubbing cloth for brush treatment of the rubbing cloth, and has any one material of a pig hair, a horsehair and a synthetic fiber; And Brush device for a rubbing cloth comprising a belt (belt) for the movement of the bristles. The method of claim 1, The belt is a brush device for a rubbing cloth, characterized in that installed in the inclined direction of the rubbing cloth crosses 45 ° to 90 °. The method according to claim 1 or 2, The bristle part, the brushing apparatus for a rubbing cloth, characterized in that is implanted in a plurality of seedling plate fixed to the outer surface of the belt in a state separated from each other. The method of claim 3, And the plurality of mealpans are detachably coupled to the belt. The method of claim 4, wherein And the driving plates are fixed to the belt by a piece. The method according to claim 1 or 2, The belt is a brush device for a rubbing cloth, characterized in that it comprises a fabric belt.

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