KR101694869B1 - Optical film slitting system - Google Patents

Abstract

The present invention relates to an optical film for rewinding each slotted film in a roll form by unwinding a roll-shaped optical film as a raw material and slitting (dividing) the sheet-like optical film into slits with a predetermined width And more particularly to an optical film slitting system in which tension values are set differently depending on a width of an optical film.

Description

[0001] OPTICAL FILM SLITTING SYSTEM [0002]

The present invention relates to an optical film for rewinding each slotted film in a roll form by unwinding a roll-shaped optical film as a raw material and slitting (dividing) the sheet-like optical film into slits with a predetermined width And more particularly to an optical film slitting system in which tension values are set differently depending on a width of an optical film.

BACKGROUND ART Optical films typified by polarizing films and phase difference films are important optical components constituting a liquid crystal display (LCD) or the like. The optical films are usually made of a roll-shaped optical film as a raw material. The optical films of the sheets are longitudinally slitted And winding the wound roll in the laser slitting step to perform laser cross cutting on the slit film.

Usually, a laser slitting system includes an unwinder equipped with a raw material roll which is an optical film, a laser slitter which slits the sheet-like optical film to be transported in one to three rows in the longitudinal direction, and a slit film And a take-up reel to take up the reel.

The unwinding, transporting and winding of such a laser slitting system is implemented by a roll-to-roll machine.

However, in the method of applying the tension to the optical film during the operation of the roll-to-roll equipment, it is arbitrarily set in view of the deflection state of the loaded optical film.

Since the tension value is arbitrarily set to the entire system by such a deflection state only, the difference in tension according to the function of the equipment or the difference in the tension due to the length of the width or the combination thereof is not taken into account and the product quality is bad due to slippage (slipping phenomenon) affect.

On the other hand, in the roll-to-roll equipment, a star defect occurs due to sucking of ambient air during winding of the slit film (see Fig. 14), and the collapse of the winding shape is easy, give. In addition, in the winding failure, the contact relationship between the wound slit films is not uniform, so that a large amount of pressure may be applied to some places, and a small amount of pressure may be applied to some places.

15, the incident angle at which the slit films 3a to 3c are wound on the take-up rolls 51a to 51c is smaller than the incident angle i1 when the first winding time (when the winding is small) (I1 > i2) when the incident angle is larger than the incident angle i2.

As shown in FIG. 6A, due to the difference in the incident angles, the amount of air to be introduced is maximized, and the amount of air introduced decreases linearly.

Further, as shown in Fig. 5A, a non-uniform pressure state in which the maximum pressure is applied between the first and last wound states is shown.

Therefore, when the outermost slit film having the maximum pressure is pushed inward, the slit film having a constant amount of air mixed with each other is collapsed and collapsed to be pressed in a star shape.

On the other hand, in the laser slitter, the slit film is slit into a slit film having a desired width and a trim film that trims both edges.

The slit film is wound on each winding roll, and the trim film is contained in the basket.

However, since the basket is installed on the lower floor of the laser slitter, the operator must always wait and check.

That is, a long process such as the insertion of a basket (garbage box) -> checking the status of a basket -> handling of a basket has been carried out.

On the other hand, the optical film to be transported oscillates to some extent up and down. This wave vibration affects the quality of the laser slit surface. Therefore, although the position of the laser itself was adjusted by the automatic position control as a method for preventing the vibration, the equipment was expensive, the mechanism was complicated, and the reaction speed was slow and it was difficult to secure the vibration stability.

On the other hand, as shown in FIG. 16, the CPC (Center Position Control) system 8 used in conventional roll-to-roll equipment is a device for detecting the centers of both sides of the slit film, The sensor width is constantly set to a narrow width. Therefore, when the width of the optical film or the slit film is longer than the narrow width of the sensors 8a and 8b, the light emitted from the projector 8a does not enter the light receiving portion of the detector 8b at all, Because of this, it is necessary to move the CPC system when the width of the film changes. Therefore, it takes time to move, which leads to a loss of operation time and deteriorates the productivity.

17, the piping 4 for connecting the suction box 41 and the dust collection box 43 for removing the laser gas (laser fume) is formed in a shape of a chair And is mounted on the pipe bracket 4a.

However, the bent portion at 90 degrees serves as a dead zone which prevents the laser gas sucked from moving smoothly. Particularly, laser gas is sticky, so it does not fall off once it is piled up, and it keeps piled up.

This clogging cycle is fast, so it needs to be cleaned frequently and it is troublesome to disconnect the piping (4) for cleaning.

On the other hand, as shown in Fig. 10 (a), since the laser slit surface is bulged to some extent by heating, if the center is uniformly wound on the winding roll, the center is wound in a concave shape. Therefore, the middle portion becomes a poorly pressed disc, which adversely affects the quality.

On the other hand, after laser slitting, foreign matter, especially laser fume, is welded as if it is welded near the slit surface. To remove it, it is removed with an adhesive roller, or is blown by blowing after scratching with a brush have.

However, it is easy to remove the adhesive roller, but it is very difficult to remove the fused fuser.

In addition, the blowing method is not only difficult to remove fusing fumes, but also complicates the equipment because it takes up a large space and complicates the implementation of compact equipment. In addition, the blowing method is more likely to cause vibration due to the influence of wind on the film.

2, the driving rollers DGR in the film feeding mechanisms R1 to R4 (DGR) of the laser slitter 30 serve to forcibly feed (slip) the film together with the nip roll do. In addition, the nip roll is used to adjust the gap of the film while moving up and down and to block the tension.

However, since there is an error in the nip roll itself, there is a phenomenon in which the film can not be pressed uniformly and the film is tilted toward the pressed portion. Further, the gap needs to be adjusted, the nip roll up and down driving equipment is required, and space is occupied by the space of this equipment.

Disclosure of the Invention The present invention has been conceived to solve the above-mentioned problems, and it is an object of the present invention to provide an optical film slitting system capable of producing excellent quality by securing stability of operation by setting tension values differently according to the film width length of winding, The present invention has been made in view of the above problems.

In order to achieve the above object, an optical film slitting system according to claim 1 of the present invention comprises: a winder on which a disk roll of an optical film is installed; A slitter for slitting the optical film wound from the winding machine in the conveying direction to cut into a plurality of slit films; And a plurality of winders for winding the plurality of slit films on respective winding rolls, wherein the tension values of the winder, the slitter and the winder are set differently according to the width length per unit length of the optical film, The tension along the width of the film per unit length is divided by a winding interval corresponding to the winding machine, a feed section corresponding to the slitter, and a winding section corresponding to the winding machine, Wherein the feed section includes an unwind feed section that is a section between the unwind nip roller and the unwind nip roller and a take-up feed section that is a section between the take-up feed nip roller and the take-up feed nip roller, Wherein the winding section is a section between the winding feed nip roller and the winding roll, and the winding interval and the winding feed section are a width of a length of the optical film Wherein the winding feed section and the winding section are sections in which the width per unit length of the optical film is shortened, and between the winding sections = the winding section of the winding> the winding feed section = The value is set.

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According to this constitution, the tension value is set differently according to the width per unit length of the films for each section of winding, slitting and winding, thereby ensuring the stability of operation.

In the optical film slitting system according to claim 2 of the present invention,

It is preferable that the tension value of the tenter, the slitter and the take-up machine is set to a tenter or slipper.

In the optical film slitting system according to claim 3 of the present invention,

It is preferable that the tension ratio of the tenter, the slitter, and the take-up machine is set to 1: 1.01 to 1.2: tenter: slitter = 1: 1.01 to 1.5.

In the optical film slitting system according to claim 4 of the present invention,

The tension ratio of the winder, the slitter and the winder is preferably adjusted by the rotational force of a nip roller provided between the winder, the slitter and the winder, and the servo motor driving the winder.

In the optical film slitting system according to claim 5 of the present invention,

Preferably, the slitter further cuts the trim film trimmed by slitting the edge of the optical film, and further sets the tension value according to the width per unit length of the trim film.

According to this structure, according to this configuration, the tension value according to the width per unit length is highly subdivided, and the stable operation can be secured further.

In the optical film slitting system according to claim 6 of the present invention,

The slitter is realized by a laser slitter, which can increase the production rate by increasing the mass production rate by carrying out high-speed slitting and shortening the process by securing the quality of the slitting surface.

In the optical film slitting system according to claim 7 of the present invention,

The slitter is preferably implemented as a cutting blade slitter.

As apparent from the above description, the optical film slitting system according to the present embodiment has the following effects.

By setting the tension value of the optical film differently according to the width per unit length, the nip roller effectively prevents sagging, slippage, and sagging of the film due to stable operation even when tension blocking is not properly performed.

Further, by further setting the tension value according to the width per unit length of the trim film, the tension value according to the width per unit length can be highly refined to further secure the overall operation stability of the system.

1 is a process perspective view schematically showing a main part of an optical film laser slitting system according to a preferred embodiment of the present invention.
Figs. 2 and 3 are a side view and a flow chart schematically showing the process chart of Fig. 1; Fig.
4 is a front view of the trim processor;
5A is a view showing a general pressure distribution according to a change in the winding diameter of the winding roll.
5B and 5C are a side view and a plan view showing an air entrained air amount control unit for pressure uniformity control according to a preferred embodiment of the present invention.
5D is a graph showing pressure values for film length.
6A is a view showing a general air mixing amount distribution according to a change in winding diameter of the winding roll;
6B and 6C are a side view and a plan view showing an air entrained air amount control unit for uniform incidence angle control according to a preferred embodiment of the present invention.
7 is a side view showing the laser slitter and the dust collecting pipe of the present invention.
8A to 8C are a bottom perspective view, a bottom plan view, and a side view showing a main portion of the laser slitter;
9A to 9C are a conceptual diagram, a plan view, and a perspective view schematically showing a swing-compatible CPC system of the present invention.
10 is a schematic view showing (a) a poorly wound state and (b) a goodly wound state.
10A is a view showing various zigzag shapes according to a swing cycle (swing speed) and a swing distance;
11 is a perspective view showing the cleaner of this embodiment.
Figures 12 and 13 are process and perspective views illustrating a belt link system.
FIG. 14 is a view showing a star defect (defective large diameter). FIG.
Fig. 15 shows a case in which a winding failure occurs. Fig. 15 (a) shows a case where the incidence angle is large when the winding diameter is small, and Fig. 15 (b) shows a case where the incidence angle is small when the winding diameter is large.
16 is a perspective view schematically showing a conventional CPC system;
17 is a side view showing a conventional laser slitter and a dust collecting pipe.

The unwinding used in the detailed description and claims of the present embodiment is a process of unrolling a raw material wound in a roll form to be conveyed in a sheet form and rewinding is performed in a sheet form Is wound back into a roll shape.

In the detailed description of this embodiment, a description has been given of a process in which one optical film is slit with two slit heads and two trim heads at a width of three rows, respectively, and the remaining two rows are trimmed and discharged. However, It will be apparent to those skilled in the art that the number of slit heads can be adjusted according to the number of divisions, trim can not be performed depending on whether the trim is trimmed, or only one edge can be performed.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a process perspective view schematically showing a main part of an optical film laser slitting system according to a preferred embodiment of the present invention, and FIGS. 2 and 3 are a side view and a flow chart schematically showing a process chart of FIG.

As shown in FIGS. 1 and 2, the optical film laser slitting system according to the present embodiment includes a winder 10, a laser slitter 30, a plurality of winders 50a to 50c, .

The laser slitter 30 separates the optical film 1 from the plurality of slit films 3a to 3c and the trim film 5 ), And the winders 50a to 50c are equipment for winding up the slit films 3a to 3c again.

The optical film laser slitting system according to the present embodiment is characterized in that it includes a winding section a, an unwinding feed section b, winding feed sections c1 to c3, and winding sections d1 to d3, .

The winding interval a provides an optical film 1 which is an interval between the master roll 11 and the unwind nip roller A and whose edge or center position is controlled in the unwinding feed section b.

The unwinding feed section b is a section between the take-up nip roller A and the take-up feed nip roller B in which the single width of the optical film 1 is divided into a plurality of slit films 3a to 3c and the trim film 5, And is transported.

The winding feed sections c1 to c3 are sections between the take-up feed nip roller B and the take-up feed nip rollers C1 to C3 in which the slit films 3a to 3c branch to the respective take-up rolls 51a to 51c Lt; / RTI >

The winding sections d1 to d3 are sections between the winding feed nip rollers C1 to C3 and the winding rolls 51a to 51c and the slit films 3a to 3c, ).

Tension is provided against deflection of the films during operation of such roll-to-roll equipment.

There are two methods of applying tension: 1) a method according to width per unit length, 2) a method according to equipment function, and 3) a method combining 1) and 2).

1) Depending on the width per unit length, the tension can be set by dividing by the tension section.

For example, after setting the tension for 1 m width to 200 N / m, a standard for setting the tension according to the width per unit length differently for each section is provided to prevent sagging, slippage and slipping during operation at a speed of 60 m / min Ensure stability of operation.

section Removal Powered feed 1 Wind feed 1 winding 2 Wind feed 2 winding 3 Wind feed 3 winding Trim (left) Trim (right) proportion One 1.1 1.1 1.2 1.1 1.2 1.1 1.2 1.1 1.1 N / m 200 m 1.3 1.3 0.404 0.404 0.404 0.404 0.404 0.404 0.044 0.044 N 260 286 89 97 89 97 89 97 10 10

That is, in the case of a 1300 mm disc, 200 * 1.3 = 260 N is set because there is no width change between the winding interval a and the winding feed interval b.

In the unwinding feed section (b), before and after trimming, the tension of the trim film (5) after trimming can be set to 200 * 0.044 = 10N.

Since the widths of the winding feed sections c1 to c3 and the winding sections d1 to d3 are divided into three columns, the width is reduced to 200 * 0.404 = 89N.

2) The system is composed of a system that pulls the tension due to the equipment function (winding, machining, winding) relatively to the winding side to ensure the stability of operation.

That is, if the tension value of the winding interval a corresponding to the tenter 10 is set to 1, the winding feed interval b and the winding feed intervals c1 to c3 corresponding to the laser slitter 30 1.01 to 1.2, and the winding sections d1 to d3 corresponding to the winder 50 are set to 1.01 to 1.5, and the tension proportional values are set differently.

Pull section: Feed section = 1: 1.01 to 1.2

Wound section: Winding section = 1: 1.01 to 1.5

3) Combination by equipment function and tension section

As shown in the table above, when the tension value according to the equipment function and the tension value according to the width per unit length are set, a precise tension value for each section is set.

That is, the interval between the sheds (a) is set to 1 * 200 * 1.3 = 260 N, and the shed feed interval (b) is set to 1.1 * 200 * 1.3 = 286N. The trim interval is set to 1.1 * 200 * 0.044 = 10N.

The winding feed sections c1 to c3 are set to 1.1 * 200 * 0.044 = 89N and the winding sections d1 to d3 are set to 1.2 * 200 * 0.044 = 97N.

Such a tension value is adjusted by the rotational force of the servomotor driving the nip rollers (A) (B) (C1 to C1) and the winding rolls (51a to 51c).

On the other hand, the trim film 5 is discharged toward the basket 9 by the discharge roller 7 as shown in Fig.

2 and 4, it is preferable that a trim processor 60 for automatically discharging the trim film 5 is disposed.

The trim processor 60 is comprised of a trim film conveyor 60 disposed on one side of the trimming film 5 underneath and the other on the other side of the trimming film conveyor 60 disposed in a basket 9 containing the trim film 5.

That is, the trim film conveyor 60 includes a trim film horizontal conveyor 61 disposed under the trim film 5 to which one side is cut, and a trim film horizontal conveyor 61 disposed between the other side of the trim film horizontal conveyor 61 and the basket 9 And a trim film inclined conveyor 63.

The basket (9) may be transported separately in the form of a cart or it may be a waste disposal plant immediately. In addition, the conveying speed of the conveyor can be adjusted to control the processing speed.

This conveyor system can reduce the labor of the operator to wait and carry out the process of putting the basket 9 into the laser slitter 30 and confirming the state inside the basket 9, .

It is preferable that the trim film inclination conveyor 63 is arranged so as to be inclined (?) So that the height thereof becomes higher toward the basket 9.

This makes it possible to increase the height of the basket 9, significantly increase the discharge throughput of the trim film 5, and further ensure work productivity.

On the other hand, when each of the slit films 3a to 3c is wound around each of the winding rolls 51a to 51c, air is mixed between the slit film and the slit film. This entrained air constitutes a fine space between the slit film and the slit film, so that the wind-up film at a portion near the rotation axis of the wind-up roll is easily pressed by the wind-up film distant from the rotation axis to deform into a star shape (see FIG. 14) .

In addition, a minute space may cause shape collapse. This is the same as the principle that if the roll paper roll is tightly wound on the core, the shape is maintained even if the core is pulled out.

In order to prevent such a pulling-up failure, it is preferable that the mixed air amount control portion 90 for pressure uniformity control shown in Figs. 5B and 5C or the mixed air amount control portion 190 for incidence angle uniformity control shown in Figs. 6B and 6C are provided. That is, in the present invention, the mixed air amount control unit controls the film so that the pressure to be wound is uniform or the incident angle of the film wound on the wind-up roll is made constant so as to make the amount of air to be mixed during film winding constant and uniform.

First, as shown in FIG. 5A, the pressure of the film wound on the wind-up roll for pressure uniformity control is as follows. 5A, the pressure P of the slit films 3a to 3c wound on the normal winding rolls 51a to 51c has a maximum pressure Pmax at the minimum winding diameter and the maximum winding diameter, It is known that the pressure is suddenly decreased and the minimum pressure (Pmin) is maintained until it is wound up to a certain degree, and then it rises suddenly to the maximum pressure as it approaches the maximum diameter.

Therefore, in order to uniform the amount of air to be introduced, it is necessary to control so that the pressure is uniformly wound on the basis of the pressure at least the minimum diameter or the maximum diameter, that is, the maximum pressure measured without pressure control. Or the mixed air is uniformly pushed out to prevent the winding failure.

5B and 5C, the mixed air amount control unit 90 for pressure uniformity control includes a touch roll 91 that contacts the slit films 3a to 3c wound on the winding rolls 51a to 51c, Up rolls 51a to 51c and the length of the film to be wound and detects the length of the winding rolls 51a to 51c and the winding rolls 51a to 51c, And a pressure uniformity control unit 95 for controlling the moving unit 93. [

In the case of pressure uniformity control, the touch roll 91 is provided with guide rollers 51a to 51c for feeding the slit films 3a to 3c to the guide rolls 51a to 51c and pressing the film to be wound on the take- to be.

The touch roll moving part 93 is preferably composed of a driving cylinder 93 installed at one end or both short axes of the touch roll 91 to move the touch roll 91 in the retreating (or advancing) direction.

In the present invention, the pressure uniformity controller 95 controls the touch roll so that the pressure of the film wound by the following three methods is kept constant.

The first method is to compare the pressure value of the film wound on the winding rolls 51a to 51c with the set pressure value and to apply the pressure value to the winding roll 91 Control the pressure. That is, when the pressure value of the film to be wound is lower than the set pressure value, the pressure to be wound is increased by lowering the retraction speed of the touch roll. If the pressure value of the film to be wound is higher than the set pressure value, So that the pressure at which the film is wound up is kept constant at the set pressure value.

The second method measures the diameter of the winding rolls 51a to 51c using a diameter measuring sensor and controls the movement of the touch roll 91 according to the winding diameter.

For example, the winding is started at a pressure value set at the minimum diameter, and the pressure applied by the touch roll to the winding roll is gradually increased as the winding diameter is increased. Then, the set winding diameter (the specified winding diameter between the maximum winding diameter and the minimum winding diameter, ) Until it reaches the maximum winding diameter, and the maximum winding diameter is set to the same value as the minimum winding diameter at the set pressure value. In this way, during the entire section in which the film is wound, the film is wound at a constant pressure.

The third method is to control the winding pressure in accordance with the length of the film to be wound or the winding time and the number of rotations of the winding roll.

This method does not require a separate diameter measuring sensor. The winding of the winding roll gradually increases in accordance with the length of the film to be wound or the winding time and the number of rotations of the winding roll, so that the pressure of the film wound in accordance with the length of the wound film or the winding time, As shown in FIG.

More specifically, the pressure uniformity control unit 95 controls the touch roll to be wound at a predetermined pressure at the time of first winding, and gradually increases the pressure applied to the winding roll by the touch roll as the winding time or the number of revolutions of the winding roll increases When the number of revolutions of the winding roll reaches a predetermined value after a predetermined time has elapsed, the pressure applied to the roll by the touch roll is gradually reduced to control the pressure applied to the entire section to be constant.

In the direction in which the winding rolls 51a to 51c are moved away from the touch roll 91 or the guide rolls instead of retreating (in the opposite direction of conveying) the winding rolls 51a to 51c with respect to the above- It will be apparent to those skilled in the art that the invention can be implemented in a retracted manner. In this case, the touch roll moving portion 93 is implemented as a winding portion for the winding rolls acting on the winding rolls 51a to 51c.

On the other hand, there is also a method of uniformly controlling the incident angle (i) of the slit films 3a to 3c incident on the winding rolls 51a to 51c as shown in Figs. 6B and 6C. The guide roll 191 is spaced apart from the winding rolls 51a to 51c by a predetermined distance.

6A, the amount of entrained air between the slit films 3a to 3c wound on the winding rolls 51a to 51c in a state where the guide roll and the winding roll are fixed is the maximum air amount Qmax at the minimum diameter, And the minimum air amount Qmin is formed at the maximum diameter.

Therefore, in order to make the mixed air amount uniform, it is necessary to control so that the incidence angle is wound in a constant state. Between the slit film wound and the slit film, air is prevented from being mixed or air is mixed at least uniformly to prevent winding failure.

If the angle of incidence is too small, the film adheres to the film due to too little air entrainment between the films being wound. If the angle of incidence is large, the amount of air to be incorporated is large and defective.

The preferred angle of incidence is from about 10 degrees to about 25 degrees.

Like the mixed air amount control unit 90 for pressure uniformity control, the incident angle air amount control unit 190 for the incidence angle uniformity control is constituted by a guide roll 191, a guide roll moving unit 193 and an incident angle uniformity control unit 195.

The guide roll 191 is a roll for adjusting the angle of incidence while guiding the slit films 3a to 3c immediately before being wound onto the winding rolls 51a to 51c so as to be transportable, do.

The guide roll moving part 193 is provided on one or both of the short axes of the guide roll 191 like the touch roll moving part 93 and is provided with a driving cylinder 193 for moving the guide roll 191 in the retreating (or advancing) .

As described above, the incidence angle uniformity controller 195 moves the guide roll at a predetermined speed according to the winding diameter of the winding roll, the length of the film, or the like, or through the winding winding amount measuring sensor mounted on the winding rolls 51a to 51c And controls the guide roll 191 by calculating the winding roll amount.

When the incident angle uniformity control unit 195 receives the value of the rotation speed of the winding rolls 51a to 51c and the total length of the wound film, the guide roll 191 is rotated by a guide roll It can be retracted in accordance with the winding amount wound by the eccentric portion 193 to keep the incident angle uniform.

Specifically, as the winding diameter increases, the incident angle gradually decreases. Therefore, the guide roll 191 is retracted so that the incident angle becomes constant even if the winding diameter increases.

It is also possible to retract the winding rolls 51a to 51c with respect to the guide roll 191 instead of retracting (in the opposite direction of conveying) the above-described guide roll 191 with respect to the winding rolls 51a to 51c It will be obvious to those skilled in the art. In this case, the guide roll moving portion 193 is implemented as a moving portion of the winding roll that acts on the winding rolls 51a to 51c.

It will be apparent to those skilled in the art that the guide roll 191 or the winding rolls 51a to 51c can be moved up and down to keep the incident angle uniform.

As described above, the incidence angle uniformity control can be implemented by the guide roll 191 or the winding rolls 51a to 51c through the back-and-forth feeding or the vertical feeding.

1 and 7, the laser slitter 30 is composed of a laser oscillator 31, a reflector 32, and a plurality of heads 33 and 34. [

The laser oscillator 31 is a device for generating a laser beam and the heads 33 and 34 are nozzles for irradiating the generated laser beam onto the optical film 1 and the reflector 32 is a laser And reflects the beam to the heads 33 and 34.

The heads 33 and 34 are constituted by a slit head 33 slitting the optical film 1 to a predetermined width and a trim head 34 trimming both edges.

The slit head 33 can be adjusted in accordance with the number of rows of width. For example, when there are two slit heads 33, the slit width is a maximum of three rows. If you want to slit two rows in width, you only need to operate one slit head. The widthwise distance of the slit head 33 is also adjustable.

It is preferable that a laser dust collector 40 for collecting gas (smoke) generated upon cutting of the optical film 1 is included in the laser slitter 30.

The laser dust collector 40 includes a suction box 41 disposed around the heads 33 and 34, a dust box 43 for collecting the gas, a pipeline 43 connecting the suction box 41 and the dust box 43, (45).

The suction box 41 is disposed near the heads 33 and 34 as shown in Figs. 8A and 8B, and is a box for sucking foreign matter (for example, laser fume) upon laser processing.

The dust collecting box 43 is a box for collecting laser fumes sucked through the suction box 41.

The pipe 45 is arranged to be inclined to secure the path of the laser beam. That is, since the pipe 45 is disposed between the laser oscillator 31 and the reflector 32, the laser beam of the laser oscillator 31 should not be caught by the pipe 45.

Therefore, the pipe 45 is connected to the suction box 41 via the lower pipe 45a having one end connected to the suction box 41, the upper pipe 45b having the other end connected to the dust box 43, the other end of the lower pipe 45a, And an intermediate slanting pipe 45c connecting one end of the second slanting pipe 45b.

Further, the intermediate inclined pipe 45c is obliquely inclined, so that the smoke of sticky nature sucked is not piled up. Therefore, the cleaning time of the pipe 45, which is difficult to clean, can be reduced, and the preparation time for the operation can be shortened to improve the productivity.

The piping 45 is supported by a piping bracket 47 fixed on the laser slitter 30,

The piping bracket 47 includes a horizontal piping bracket 47a for supporting the upper piping 45b and a vertical piping bracket 47b extending downward from one end of the horizontal piping bracket 45a and fixed on the main body of the laser slitter 30, (45b). Therefore, the pipe bracket 47 is bent twice and is simple in shape.

At this time, it is preferable that the lower pipe 45a is made of stainless steel, the intermediate inclined pipe 45c is made of aluminum or cast iron, and the upper pipe 45b is made of PVC.

On the other hand, the entire pipe 45 may be made of a plastic-based material, in particular, a PVC material. Plastics have a slippery property, so sticky laser fumes do not adhere well, and the load of the foreign object is not well loaded.

In addition, the piping 45 may be made of a metal-based material having a plastic coating inside, which may contribute to prevention of accumulation of foreign matter. The metal at this time is preferably made of stainless steel or steel.

On the other hand, when the optical film 1 to be transported passes through the laser slitter 30, wave vibration may occur. If this vibration occurs on the side of the irradiation unit, it affects the quality. That is, when the oscillation width of the optical film 1 in the laser slit is within ± 300, stable quality can be secured. This is because when the distance between the guide rolls R2 and the guide rolls R3 arranged between the laser slitters 30 is large, the vibration becomes large.

The gap between the guide rolls R2 and R3 is set so that the rolls R2 and R3 are moved to the vicinity of the laser slitter 30 due to the laser heads 33 and 34 and the suction box 41, Is not easily accessible.

In order to solve this problem, as shown in Figs. 8A to 8C, it is preferable that the anti-vibration contact member 35 is arranged near the irradiation part of the laser beam.

The anti-vibration contact member 35 is implemented as a wheel-shaped upper roll 36 disposed on the upper surface of the optical film 1 to help the optical film 1 to be transported in a straight shape.

It is preferable that the upper roll 36 is disposed on both sides (both widthwise sides) of the laser beam irradiated on the optical film 1. [

Therefore, since the upper roll 36 on both sides is located below the irradiating portion of the laser beam and the optical film 1 being conveyed is vertically vibrated, the wave vibration is suppressed by pressing it in the contact state. Therefore, It is kept constant as much as possible, so that an error due to the slit does not occur.

Particularly, the upper roll 36 is arranged close to the irradiation part, and its vibration suppressing effect is excellent.

Further, since the upper roll 36 is mounted on the suction box 41 using the roll bracket 38, no additional space is required.

In order to more reliably prevent such vibration, it is preferable that a lower roll 37 is further provided on the lower surface of the optical film 1. [

The lower rolls 37 are respectively disposed on the lower surface of the optical film 1 and the lower surfaces of the slit films 3a to 3c to reliably prevent the wave vibration in the vertical direction. The lower roll 37 is disposed in front and rear (longitudinal or forward and backward directions) of the laser slitter 30 so as to be realized as a cylindrical roll and to function as a guide roll.

The upper roll 36 and the lower roll 37 serve as a reinforcing roll, thereby confirming the effect of suppressing the vibration of the irradiating unit up to a feed rate of 80 m / min using a vibration confirmation measuring machine.

On the other hand, the present invention includes a center position control (CPC) system for preventing meandering of elongated (long) film in order to more precisely correct wrinkles, leaning, deformation, etc. of the wound slit films 3a to 3c do. This CPC system detects edge edges of the optical film (1) or slit films (3a to 3c) with an air servo sensor or an optical sensor, and controls the conveying direction based on the information to adjust the center of the film in the width direction A flat expander roll having one or two guide rolls or a drive may be corrected by skewing the film in a lateral direction (or up and down) with respect to the line direction, Two sets of pinch rolls are provided (one on each of the front and back surfaces of the film, which is on both sides of the film), and the film is sandwiched therebetween to modify the film by crossing (cross guider type). The principle of skew correction of these devices is such that when the film is going to go to the left side, for example, while moving, in the former method, the roll is tilted so that the film goes to the right side. In the latter method, And is pulled to the right side.

9A and 9B, the CPC system 80 of the present embodiment includes a CPC sensor 81 disposed at both edges of slit films 3a to 3c to be conveyed, A control unit 83 for receiving the shift of the center rollers 3a to 3c from the center and a drive cylinder 85 for adjusting the position of the guide roll 89 driven by the control unit 83 to guide the slit films 3a to 3c ).

The CPC sensor 81 includes a projector 81a having a light emitting portion 82a disposed under the slit films 3a to 3c and a light receiving portion 82b disposed above the slit films 3a to 3c, (81b). At this time, the light emitting portion 82a and the light receiving portion 82b are mounted at a wide width (or more than the entire width) in the width direction of the slit films 3a to 3c.

The length of the projector 81a and the length of the detector 81b is set to be longer than at least the width of the slit films 3a to 3c as shown in FIG. ) Can be detected without moving.

With this configuration, the light emitted from the light emitting portion 82a detects the amount of light entering the light receiving portion 82b and aligns the center. For example, when it is determined that the sensor does not match when the light from the left side and the light from the right side are not received equally, the driving cylinder 85 moves the guide roll 89 to the left or right to align the center.

Therefore, since the lengths of the widths of the slit films 3a to 3c can be variously slitted depending on the use, the CPC sensor 81 does not need to move to the corresponding position even if the width is changed, Thereby suppressing the time loss as much as possible.

This CPC system 80 is applicable not only to the slit films 3a to 3c but also to the optical film 1 between the unwinding and laser processing. Of course, it is preferable to use an EPC (edge position control) system 20 before trimming.

The EPC system 20 is similar in structure and function to the CPC system 80, but uses only one sensor because it detects only one edge.

On the other hand, the slit faces of the slit films 3a to 3c slit with the laser swell due to fusing of heat or the like compared to other faces.

When the swollen slit films 3a to 3c are wound up, both side edges (edges) are thicker than the center portion, so that the slit films are recessed toward the center (see Fig. 10 (a)).

It is preferable that a swing member 180 swinging in the width direction of the slit films 3a to 3c is disposed in front of the winding rolls 51a to 51c in order to solve this problem.

The swinging member 180 is wound around the winding rolls 51a to 51c in a zigzag manner in the width direction of the slit films 3a to 3c swinging (see Fig. 10 (b)).

The swing member 180 may use the configuration of the CPC system 80 as it is.

That is, the swinging member 180 is configured to swing the guide roll 89 of the CPC system 80 by pushing and pulling the guide roll 89 in the width direction against each other as shown in FIG. 9A, When you swing as you sideways, you will zigzag the edges. At this time, it is preferable that a swing drive cylinder 185 is additionally provided separately from the drive cylinder 85. The swing cycle (swing speed) and the swing distance of the guide roll 89 are controlled by the control unit 83. Of course, instead of the guide roll 89, a separate swing roll may be implemented.

Therefore, when the center of the film is aligned with the guide roll 89 and then swung, the edges are wound in a staggered manner so that both ends are swollen to prevent the defective film from being pressed.

As shown in Fig. 10 (b), the zigzag winding is overlapped while going outward, and then wound in a superimposed manner while coming in again, so that the swing operation of the guide roll 89 is easy, And is almost in a straight line in the width direction wound up as shown in Fig. 10 (b).

As shown in FIG. 10A, the zigzag overlapped form can be implemented in a desired form according to the swing cycle (swing speed) and swing distance of the guide roll 89 by the control unit.

10A, when the swing cycle (swing speed) and the maximum swing distance are taken as 1, II in FIG. 10A speeds up the swing speed so that a pitch (3/2 swing cycle) larger than one pitch in one swing cycle And Fig. 10 (III) can be wound up so that the maximum swing distance is made larger than 1 (W1 > W) so that the maximum width is widened. At this time, it is preferable to wind the slit film in a non-swing state for a predetermined length, for example, about 20 to 30 m, and then wind it while swinging.

The initial non-swing winding can prevent the edges that are stacked in a stepped shape from collapsing because the initial non-swing wound film acts as a base for firmly supporting the windings even if the zigzagged overlapping edges are wound up to some extent.

On the other hand, in the case of slitting with a laser, foreign matter, particularly laser fume, is fused to the slit surface or its vicinity.

By rubbing off the fused fumes, the size of the cleaner is made compact, facilitating the installation and operation of the equipment, and improving the performance of the cleaner.

It is preferable that the cleaner 70 of this embodiment shown in Fig. 11 is mounted on a cleaner bracket 79 provided on the main body of the laser slitter 30.

The cleaner 10 includes a cloth 71 that touches the foreign object, a cloth roll 73 that rolls the cloth 71 in the form of a roll, and a cloth winding roll 75 that rolls the cloth 71 back into a roll shape.

At this time, the winding and conveying direction of the cloth 71 is arranged opposite to the winding and conveying direction of the slit films 3a to 3c, thereby enhancing the rubbing effect.

Further, a servomotor (not shown) is mounted on the cloth winding roll 75 to wind it up (it is also possible to adjust the tension according to the rotation speed).

It is also preferable that a cloth tension roll 77 for applying a tension to the cloth 71 is mounted on the cleaner bracket 79. [

At this time, the fabric take-up rolls 75, the weft-insertion take-up rolls 73 and the cloth tension rolls 77 are arranged in the order of the transport direction of the slit films 3a to 3c, So that the inclined cloth 71 between the cloth tension roll 77 and the cloth take-up roll 75 rubs the foreign object. The warp is adjustable through the elevation of the cloth roll 77.

Since the slanting cloth 71 is in line contact with the film of the guide roll R3 in this manner and gradually rubbed, the removal rate is increased without giving a little resistance to the film transfer, And the like.

On the other hand, it is preferable to forcibly drive the guide rolls in order to drive and feed the film instead of the nip rollers (the nip rolls and the fixed drive rolls). This is because the elevating nip roll can not press uniformly due to the error of the roll itself or the thickness error of the film, and there is a high possibility of causing a phenomenon of leaning toward the pressed portion (meandering). In addition, the nip roller has a problem in that it is necessary to adjust the gap with the driving roll.

In order to solve this problem, in the forced driving method of the guide roll, the first guide roll is forcibly driven by the power transmitting member and the second guide roll or the driving roll itself is driven by the frictional force using the one having a large surface roughness Ry ≪ / RTI >

12 and 13, the film conveying mechanism includes a driving roll (DGR) for driving and conveying an optical film (or a slit film), a plurality of guide rolls (R1 to R5) for guiding the optical film R4 and the power transmitting member for transmitting the rotational force of the driving roll DGR.

Due to this power transmitting member, the guide rolls R1 to R4 also function as a driving roll for driving and transporting the optical film (slit film), so that they can be transported without using a nip roll.

The power transmitting member includes a timing belt TV1 (TV2) for connecting the timing pulleys (not shown) of the motor M for driving the driving roll DGR and the timing pulleys TP1 to TP4 of the guide rolls R1 to R4, .

The timing belt TV1 TV2 has a first timing belt TV1 for transmitting the rotational force of the driving roll DGR to the second guide roll R2, the third guide roll R3 and the fourth guide roll R4, And a second timing belt TV2 for transmitting the rotational force of the fourth guide roll R4 to the first guide roll R1.

Two timing pulleys TP4 and TP4 '' are provided on the rotation axis of one guide roll R4 so that the first timing belt TV1 and the second timing belt TV2 are engaged.

Such a belt link system does not need to adjust the gap according to the thickness of the film while realizing the function of blocking the tension together with the rotational force of the motor M.

On the other hand, since the guide rolls R1 to R4 or the drive rollers DGR are made of a material having a large surface roughness with respect to the film, the frictional force with the film is increased, so that the film can be forcedly driven instead of the nip roll. Can be realized.

The surface roughness of the film is 0.4 to 0.8 and the surface roughness of the guide roll or the driving roll is about 0.3 to 1. The surface roughness of the guide roll or the driving roll of the present embodiment is 2 times or more, .

In addition, as shown in Fig. 12, the incident angle (i) of the optical film entering the driving roll (DGR) is 20 degrees or less, preferably about 10 degrees. This further increases the contact area between the optical film and the outer circumferential surface of the driving roll, thereby facilitating forced driving with surface roughness.

For example, there is a method in which the guide rolls R1 to R4 or the driving rolls DGR are implemented as a rubber roll, or the outer circumferential surface thereof is covered with a rubber material or coated.

Because of such a belt link method and a frictional force increasing method, there is an advantage of preventing the risk of occurrence of meandering without need of a nip roll and the necessity of gap adjustment without using a nip roll. Further, the nip roll elevating apparatus is expensive and complicated, and the space occupied by the system of the nip roll and lift apparatus is also reduced.

The optical film slitting process of this embodiment thus configured is as follows.

3, in the optical film slitting process, the optical film slitting process mainly includes an unwinding process for winding the optical film 1 from the original roll 11, A trimming process for draining the trim film 5, a slit film 3a to 3c for cutting the trim film 5, and a trimming process for trimming the slice film 3a to 3c and trimming film 5, , And a winding step of winding the slit films 3a to 3c from which the foreign matter has been removed, onto the respective winding rolls 51a to 51c.

At this time, an edge position control (EPC) process for controlling the edge position of the optical film 1 wound up before the slitting is carried out straight to the laser slitting process, thereby ensuring quality improvement in slitting. Further, the winding step may be wound up to some extent straight from the beginning, and then wound so that the edge portions are piled up in zigzags while swinging.

The center position control (CPC) process for controlling the center positions of the slit films 3a to 3c to be conveyed in the cleaning process is performed in such a manner that the slit films 3a to 3c are stably wound on the winding rolls 51a to 51c Thereby enhancing product quality.

The trim process includes a trim film conveyor process for transporting and discharging the trim film 1 to be cut to the basket 9.

Because of the trim film conveyor process, the trim film 5 can be automatically processed, and the productivity can be improved.

The trim film conveyor process includes a trim film transfer process for transferring the trim film 5 to be cut to the horizontal conveyor 61 and a trim film transfer process for transferring the trim film 5 transferred from the horizontal conveyor 61 to the slope conveyor 63 And discharging it to the basket (9), it is possible to increase the collection capacity of the trim film.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. .

For example, although the laser slitters are described in this embodiment, those skilled in the art will appreciate that the laser slitters can be implemented as cutting blade slitters instead of laser slitters.

The setting of the tension value per width length of the present invention can be applied to any roll-to-roll equipment for slitting a flexible material.

1: Optical films 3a to 3c: Slit film
4: piping 4a: piping bracket
5: Trim film 7: Discharge roller
8: CPC System 8a: Projector
8b: Detector 9: Basket (garbage box)
10: take-out machine 11: disk roll
20: EPC system 30: laser slitter
31: laser oscillator 32: reflector
33: slit head 34: trim head
35: anti-vibration contact member 36: upper roll
37: lower roll 38: roll bracket
40: laser dust collector 41: suction box
43: dust collecting box 45: piping
45a: lower piping 45b: upper piping
45c: intermediate inclined piping 47: piping bracket
47a: Horizontal piping bracket 47b: Vertical piping bracket
50a to 50c: take-up winders 51a to 51c:
60: Trim processor (Trim film conveyor) 61: Trim film horizontal conveyor
63: trim film inclined conveyor 70: cleaner
71: One thousand 73:
75: Thinning roll 77: Thinning roll
79: Cleaner bracket 80: CPC system
81: CPC sensor 81a: projector
81b: Detector 82a:
82b: light receiving section 83:
85: drive cylinder 89, 191: guide roll
90,190: Mixed air amount control unit 91: Touch roll
93: Touch roll moving part 95: Pressure uniformity control part
191: guide roll 193: guide roll moving part
195: incidence angle uniformity control unit 180: swing member
185: swing drive cylinder A: take-up nip roller
B: Feed Feed Nip Roller C1-3: 1 ~ 3 Coil Feed Nip Roller
a: between the exit b: the withdrawal feed section
c1 to c3: 1 to 3 reel feed sections d1 to d3: 1 to 3 reel sections

Claims (7)

A winder on which a roll of optical film is installed; A slitter for slitting the optical film wound from the winding machine in the conveying direction to cut into a plurality of slit films; And a plurality of winders for winding the plurality of slit films onto respective winding rolls,
The tension value of the winder, the slitter and the winder is set differently according to the width of the optical film per unit length,
Wherein a tension according to a width length per unit length of the optical film is divided by a winding interval corresponding to the winding machine, a feed section corresponding to the slitter, and a winding section corresponding to the winding machine,
The interval between the winding rolls is a section between the master roll and the unwinding nip roller,
Wherein the feed section includes an unwind feed section that is a section between the take-up nip roller and the take-up feed nip roller and a take-up feed section that is a section between the take-up feed nip roller and the take-
Wherein the winding section is a section between the winding feed nip roller and the winding roll,
The interval between the ejection openings and the ejection feed section is a period in which the width length per unit length of the optical film is not changed,
Wherein the winding feed section and the winding section are sections in which the width per unit length of the optical film is shortened,
The tension value is set to the winding interval = the winding-out feed section> the winding-up feed section = the winding section.
The method according to claim 1,
The tension value of the winder, the slitter and the winder is set to a winder or slider or winder.
3. The method of claim 2,
The tension ratio of the winder, the slitter and the winder is
The optical film slitting system was set at a tenter: slitter = 1: 1.01 to 1.2 or tenter: tenter = 1: 1.01 to 1.5.
The method of claim 3,
Wherein the tension ratio of the winder, the slitter and the winder is adjusted by the rotational force of a nip roller provided between the winder, the slitter and the winder, and a servomotor driving the winder roll.
5. The method according to any one of claims 1 to 4,
Wherein the slitter slits the edge of the optical film to further trim the trim film,
Wherein a tension value according to a width per unit length of the trim film is further set.
5. The method according to any one of claims 1 to 4,
Wherein the slitter is a laser slitter.
5. The method according to any one of claims 1 to 4,
Wherein the slitter is a cutting blade slitter.

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