KR20110118266A - Optical film slitting system - Google Patents

Abstract

The present invention unwinds a roll-shaped optical film as a raw material, and rewinds each of the slot films in which a sheet-like optical film is slitting (divided) into a slitter in a predetermined width in a roll shape. The present invention relates to an optical film slitting system in which tension is set differently according to unwinding, slitting, and winding equipment regardless of a width of a slot film.

Description

Optical film slitting system {OPTICAL FILM SLITTING SYSTEM}

The present invention unwinds a roll-shaped optical film as a raw material, and rewinds each of the slot films in which a sheet-like optical film is slitting (divided) into a slitter in a predetermined width in a roll shape. The present invention relates to an optical film slitting system in which tension is set differently according to unwinding, slitting, and winding equipment regardless of a width of a slot film.

Optical films represented by polarizing films, retardation films, and the like are important optical components constituting liquid crystal displays (LCDs) and the like. Usually, roll-shaped optical films are used as raw materials, and the optical films of the sheets are longitudinally slitted from them. It manufactures by winding up the wound laser slitting process and the roll wound by this laser slitting process, and carrying out laser cross cutting of a slit film.

The laser slitting system usually includes an unwinder having a raw material roll, an optical film, a laser slitter for slitting the sheet-shaped optical film in one to three rows in the longitudinal direction, and one to three rows of slit films. It is comprised by the winding machine which winds up again.

The unwinding, conveying, and winding of such a laser slitting system is realized by roll-to-roll equipment.

However, the method of applying tension to the optical film during operation of the roll-to-roll equipment was arbitrarily set by looking at the deflection state of the hanging optical film.

Since the tension value is arbitrarily set in the whole system only by this deflection state, it is not good for the product quality due to meandering (sliding to one side), slip, etc., without considering the tension difference according to the equipment function or the tension difference or combination thereof according to the width length. affect.

On the other hand, in the roll-to-roll equipment, a winding defect (star defect) caused by the surrounding air being sucked up during the winding of the slit film occurs (see FIG. 14). give. In addition, the winding failure is not uniform contact relationship between the wound slit film may be pressed in many places and pressed in some places may damage the product.

That is, as shown in FIG. 15, when the incident angle i1 wound up of the slit films 3a to 3c on the winding rolls 51a to 51c is completely wound up when the incident angle i1 when it is first wound up (when the diameter is small) is wound up ( Larger than the incident angle i2 of the winding diameter (i1 > i2).

Due to such a difference in incidence angle, as shown in FIG. 6A, the amount of air mixing is maximized, and the amount of air mixing decreases linearly.

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

Therefore, when the outermost slit film subjected to the maximum pressure is pressed inwards, the slit films of which air mixing amount is not constant are pressed down and collapsed to be pressed in a star shape.

On the other hand, in the laser slitter, slitting is performed with a slit film having a desired predetermined width and a trim film trimming both edges.

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

By the way, since the basket is installed on the lower floor of the laser slitter, the operator should always wait and check.

That is, a long process such as putting a basket (garbage box)-> checking the basket status-> basket processing was performed.

On the other hand, the conveying optical film vibrates up and down to some extent. This wave vibration affects the quality of the laser slit surface. Thus, in the conventional method for preventing vibration, the position of the laser itself was adjusted by automatic position control, but the equipment was expensive, the mechanism was complicated, and the reaction speed was low, so it was difficult to secure vibration stability.

On the other hand, as shown in Figure 16, the CPC (center position control) system 8 used in the existing roll-to-roll equipment is a device for detecting both ends of the slit film to check the center, both ends monitoring The sensor width is fixed at 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 so that the position of the sensor is always correct. Because of the misconception, the CPC system must be moved when the width of the film changes. This takes time for the move, which leads to a loss of operating time, thereby weakening productivity.

In addition, as shown in FIG. 17, the pipe 4 connecting the suction box 41 and the dust collecting box 43 for removing the laser gas (laser fume) has a chair shape when viewed from the side to avoid the laser beam. 90 degree double bending is attached to the piping bracket (4a).

However, this 90 degree double bent portion serves as a dead zone that prevents the suctioned laser gas from moving smoothly. In particular, the laser gas has a sticky property, so once accumulated, the laser gas does not fall well and continues to accumulate.

This clogging cycle is fast, so it is necessary to clean it frequently, and it is cumbersome to remove the pipe 4 to clean it.

On the other hand, as shown to Fig.10 (a), since the laser slit surface swells to some extent by heating, it winds up in the concave form when the center is wound to a winding roll uniformly. Therefore, the middle part becomes a pressed bad disk, which adversely affects the quality.

On the other hand, after laser slitting, foreign materials, especially laser fumes, are welded together as if they are welded near the slit surface, which can be removed with an adhesive roller to remove them, or with a brush and blown by blow. have.

However, adhesive rollers are easy to remove from the film, but it is very difficult to remove the fused fume.

In addition, the blow method is difficult to remove the fused fume, and the equipment is many and complicated and occupies a large space, thereby counteracting the compact equipment. In addition, the blow method has a high possibility that the wind affects the film to generate vibration.

Meanwhile, referring to FIG. 2, in the film transfer mechanisms R1 to R4 (DGR) of the laser slitter 30, the driving roll DGR serves to force the film (slip prevention) together with the nip roll. do. In addition, the nip roll is used for adjusting the gap of the film and moving the tension while moving up and down.

However, since the nip roll itself has an error, there is a phenomenon in which the film cannot be pressed evenly and is drawn to the pressed portion. In addition, the gap needs to be adjusted and the up and down drive equipment of the nip roll is required, taking up space as much as the space of this equipment.

The present invention has been made in order to solve the above-described problem, by setting the tension applied to the film according to the function of unwinding, slitting, winding differently to ensure the stability of the operation of the optical film slitting system that can produce excellent quality The purpose is to provide.

In order to achieve the above object, the optical film slitting system according to claim 1 of the present invention,

A take-up machine in which a disc roll of the optical film is installed; A slitter that slits the optical film unwound from the unwinder in a feed direction and is cut into a plurality of slit films; Including a winding machine for winding the plurality of slit films on each winding roll,

The tension ratio of the film is set differently for each function of the unwinding section of the unwinder, the feed section of the slitter and the winding-up section of the winder.

According to this configuration, the tension ratio applied to the film for each of the functions of unwinding, slitting, and winding is set differently to secure driving stability.

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

It is preferable to set the tension ratio of the film to the unwinding section <feed section or unwinding section <winding section.

According to this structure, the system which pulls out from a winding machine is comprised, and effectively prevents sagging, meandering, or slipping of a film during operation.

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

The tension ratio of the film is preferably set to unwinding section: feed section = 1: 1.01 to 1.2 or unwinding section: winding section = 1: 1.01 to 1.5.

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

The unwinding section is a section between the disc roll and the unwinding nip roller, the feed section is a unwinding feed section which is a section between the unwinding nip roller and unwinding feed nip roller, and between the unwinding feed nip roller and the unwinding feed nip roller. And a winding feed section, wherein the winding section comprises a section between the winding feed nip roller and the winding roll.

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

The slitter may be implemented as a laser slitter to improve the mass production speed by performing a high speed slitting to increase the production volume, and to shorten the process by securing the quality of the slit surface.

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

The slitter is also preferably implemented as a cutting blade slitter.

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

It is preferable to further combine the tension values of the unwinder, slitter and winder set according to the width per unit length of the film.

According to this configuration, by combining the tension ratio for each equipment function and the tension value for each width per unit length, it is possible to secure more precise and stable operation and to significantly improve the quality of the optical film whose precision is very important.

The optical film slitting system according to claim 8 of the present invention,

The slitter may further trim the trim film trimmed by slitting the edges of the optical film, and further set a tension value according to the width per unit length of the trim film.

According to this structure, the tension value according to the width | variety per unit length can be subdivided very much, and the stable operation can be ensured further.

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

By setting the tension ratio of the optical film differently according to the function of the unwinding section, the feed section and the winding section, stable operation according to the set tension ratio is possible even if the nip roller does not properly block the tension.

In addition, by setting the tension proportional value in the order of unwinding section <feed section <winding section, the system can be pulled out from the winding machine. Effectively prevents.

In addition, by performing laser processing (slitting and trimming), the production speed can be improved by increasing the production speed by high-speed processing, and the process can be shortened by securing the quality of the processed surface.

In addition, by combining the tension value according to the width per unit length of the films in the tension section by the tension proportional value according to the function of the equipment, the stable operation is further secured throughout the roll-to-roll system to improve the quality of the optical film whose precision is very important. Can be significantly improved.

In addition, 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 further subdivided to further ensure the overall operating stability.

1 is a process perspective view schematically showing the main part of an optical film laser slitting system according to a preferred embodiment of the present invention;
2 and 3 are a side view and a flow chart schematically showing the process diagram of FIG.
4 is a front view showing a trim processor.
Figure 5a is a view showing a general pressure distribution according to the change in the diameter of the take-up roll.
Figure 5b and Figure 5c is a side view and a plan view showing an air mixing air volume control unit for pressure uniform control according to a preferred embodiment of the present invention.
5D is a graph showing the pressure value versus the film length.
Figure 6a is a diagram showing a general air mixing amount distribution according to the change in the diameter of the take-up roll.
6b and 6c are a side view and a plan view showing an air mixing air amount control unit for uniform control of the incident angle in accordance with a preferred embodiment of the present invention.
Figure 7 is a side view showing the laser slitter and the dust collecting pipe of the present invention.
8A-8C are a bottom perspective view, a bottom plan view and a side view of the main portion of the laser slitter;
9A to 9C are conceptual views, plan views and perspective views schematically showing a swing combined CPC system of the present invention.
10 is a schematic diagram showing (a) a bad wound state and (b) a good wound state.
FIG. 10A illustrates various zigzag shapes according to swing cycles (swing speeds) and swing distances.
11 is a perspective view showing a cleaner of this embodiment.
12 and 13 are process views and perspective views of the belt link system.
FIG. 14 is a diagram illustrating a winding defect (star defect).
15 is a case in which winding failure occurs, (a) is a large angle of incidence when the diameter is small, (b) is a diagram showing a case where the angle of incidence is small when the 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 dust collecting piping.

Unwinding used in the detailed description and claims of this embodiment is to unwind the raw material (optical film) wound in a roll shape is transferred to the sheet shape, rewinding is a sheet shape processing the optical film It is defined as winding the slit film in roll shape again.

In addition, in the detailed description of the present embodiment, one optical film is slitted with two rows of two slits and two trim heads, respectively, wound in three rows, and the remaining two rows are trimmed and discharged. The number of slit heads is also adjustable according to the number of divisions, and it will be apparent to those skilled in the art that the trim may or may not be performed depending on the trim.

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

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 side views and flowcharts schematically showing the process diagram of FIG. 1.

As shown in Figure 1 and 2, the optical film laser slitting system according to the present embodiment is classified by the equipment function of the unwinder 10, the laser slitter 30 and the plurality of winding machines (50a ~ 50c) Consists of

That is, the unwinder 10 is a device that allows the optical film 1 to be released in a sheet shape, and the laser slitter 30 uses the optical film 1 as a plurality of slit films 3a to 3c and trim film 5. ), And the winding machines 50a to 50c are the equipment for winding the slit films 3a to 3c again.

On the other hand, when divided by the tension section, the optical film laser slitting system according to the present embodiment is unwinding section (a), unwinding feed section (b), winding feed section (c1 ~ c3) and winding section (d1 ~ d3) It consists of.

The unwinding section a is a section between the disc roll 11 and the unwinding nip roller A, and provides the unwinding feed section b with the optical film 1 having controlled the edge or the center position.

The unwind feed section (b) is a section between the unwind nip roller (A) and the unwind feed nip roller (B), wherein a single width of the optical film 1 has a plurality of slit films 3a to 3c and trim film 5. It is transported while processing.

The winding feed section c1 to c3 is a section between the unwinding feed nip roller B and the wound feed nip rollers C1 to C3, and the slit films 3a to 3c are branched into each of the winding rolls 51a to 51c. Transferred.

The winding section d1 to d3 is a section between the winding feed nip rollers C1 to C3 and the winding rolls 51a to 51c. The winding rolls 51a to 51c cover the slit films 3a to 3c which control the center position and the like. ) Is wound up.

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

There are two ways to apply tension: 1) the width per unit length, 2) the equipment function, and 3) the combination of 1) and 2).

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

For example, after setting the tension for width 1m as 200N / m, by setting a standard for setting the tension according to the width per unit length for each section to prevent sagging, meandering, slipping during operation at 60m / min speed Secure the stability of the operation.

section Unwind Unwind feed 1 winding feed 1 winding 2 winding feed 2 winding 3 winding 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

In other words, in the case of the 1300 mm disk, since the width does not change in the unwinding section a and the unwinding feed section b, it is set to 200 * 1.3 = 260N.

In the unwind feed section (b) is divided into before and after trimming, the tension of the trim film 5 after trimming may be set to 200 * 0.044 = 10N.

Since the winding feed sections c1 to c3 and the winding sections d1 to d3 are divided into three columns in width, their width becomes smaller and is set to 200 * 0.404 = 89N.

2) The tension according to the equipment function (unwinding, processing, winding) is composed of a system that pulls relatively to the winding side to secure the stability of operation.

That is, when the tension value of the unwinding section (a) corresponding to the unwinder 10 is set to 1, the unwinding feed section (b) and the winding feed section (c1 to c3) corresponding to the laser slitter 30 are 1.01 ~ 1.2, winding section (d1 ~ d3) corresponding to the winder 50 is set to 1.01 ~ 1.5, the tension proportional value is set differently.

Unwinding section: Feed section = 1: 1.01 ~ 1.2

Unwinding section: Winding section = 1: 1.01 ~ 1.5

3) Combination by equipment function and tension section

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

That is, the unwinding section a is set to 1 * 200 * 1.3 = 260N, and the unwinding feed section b is set to 1.1 * 200 * 1.3 = 286N. The trim section 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 servo motor which drives nip rollers A (B) (C1-C1) and snuff rolls 51a-51c.

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

In addition, as shown in Figures 2 and 4, it is preferable that the trim processor 60 for automatically discharging the trim film 5 is disposed.

The trim processor 60 is composed of a trim film conveyor 60 disposed at one side under the trimmed trim film 5 and the other side disposed at the basket 9 containing the trim film 5.

That is, the trim film conveyor 60 is disposed between the trim film horizontal conveyor 61 disposed below the trim film 5 on which one side is cut, and the other side of the trim film horizontal conveyor 61 and the basket 9. The trim film slant conveyor 63 is comprised.

The basket 9 may be separately transported in the form of a cart or may be a waste disposal site. In addition, the processing speed may be adjusted by adjusting the conveying speed of the conveyor.

Due to this conveyor system, the basket 9 may be introduced into the laser slitter 30, and the worker may wait to transport the basket to check the state of the basket 9. .

In addition, the trim film inclined conveyor 63 is preferably disposed to be inclined θ so that the height thereof becomes higher toward the basket 9.

This can increase the height of the basket 9, which can significantly increase the discharge throughput of the trim film 5, thereby further securing work productivity.

On the other hand, when the respective slit films 3a to 3c are wound on each of the winding rolls 51a to 51c, air is mixed between the slit film and the slit film. The mixed air constitutes a fine space between the slit film and the slit film, so that the winding film of the portion close to the rotation axis of the winding roll is easily pressed by the winding film far from the rotation axis to deform into a star shape (see FIG. 14), thereby resulting in poor treatment. .

In addition, fine spaces can cause shape collapse. This is the same principle that if the roll tissue is tightly wound on the core, the shape is maintained even if the core is pulled out.

In order to prevent such a winding failure, it is preferable that the mixed pressure amount control unit 90 for controlling pressure uniformity of FIG. 5B and FIG. 5C or the mixed amount amount control unit 190 for incident angle uniformity control of FIGS. 6B and 6C are provided. That is, in the present invention, the mixed air amount controller controls the pressure to be uniformly wound so as to make the amount of air mixed during film winding constant and uniform, or to make the incident angle of the film wound on the winding roll constant.

First, the pressure of the film wound on the take-up roll is typically as shown in FIG. 5A for pressure uniformity control. Referring to FIG. 5A, the pressure P of the slit films 3a to 3c usually wound on the winding rolls 51a to 51c has a maximum pressure Pmax formed at the minimum diameter and the maximum diameter, and further wound at the minimum diameter. It is known that the pressure drops rapidly and maintains the minimum pressure (Pmin) until it is wound to some extent, and then rises rapidly to the maximum pressure as the maximum diameter is approached.

Therefore, in order to make the amount of entrained air uniform, it is necessary to control the pressure to be wound in a constant state based on the pressure at least the minimum diameter or the maximum diameter, that is, the maximum pressure measured without the pressure control, to prevent the mixing of air between the slit film and the slit film. Alternatively, the entrained air is pushed out uniformly to prevent winding failure.

As shown in FIGS. 5B and 5C, the mixed pressure air 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, and a touch roll. Touch roll moving part 93 for moving the 91 in the retracting direction from the winding rolls 51a to 51c, and the roll of the winding rolls 51a to 51c to sense the length of the roll, the winding pressure, or the length of the film to be wound. The pressure uniformity control part 95 which controls the moving part 93 is comprised.

In the case of pressure uniform control, the touch roll 91 guides the transfer of the slit films 3a to 3c to the guide and the winding rolls 51a to 51c to press the guide roll to press the film to be wound onto the winding roll at a constant pressure. to be.

The touch roll moving unit 93 is preferably configured to include a driving cylinder 93 installed at one end or both ends of the touch roll 91 to move the touch roll 91 in the retreat (or forward) direction.

In the present invention, the pressure uniformity control unit 95 controls the touch roll so that the pressure of the film wound in the following three ways is kept constant.

In the first method, the touch roll 91 is applied to the take-up roll so as to receive a pressure value of the film wound through the pressure measuring sensors mounted on the take-up rolls 51a to 51c and compare the pressure value with the set pressure value. To control the pressure. That is, when the pressure value of the film is lower than the set pressure value, the winding pressure is increased by lowering the retraction speed of the touch roll. When the pressure value of the film being wound is higher than the set pressure value, the retraction speed of the touch roll is increased. Slightly increased to ensure that the wound pressure of the film remains constant at the set pressure value.

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

For example, starting winding with the pressure value set in the minimum winding, gradually increasing the pressure applied by the touch roll to the winding roll as the winding diameter increases, and then setting the winding diameter (a specific diameter between the maximum winding diameter and the minimum winding diameter, the set value Gradually decrease until the maximum diameter is reached, so that at the maximum diameter, the coil is wound with the set pressure value as with the minimum diameter. In this way, the film is wound at a constant pressure during the entire period of time it is wound.

The third method is to control the winding pressure according to the length or winding time of the film to be wound and the rotation speed of the winding roll.

This method does not require a separate diameter measuring sensor. Since the diameter of the take-up roll increases gradually with the length or take-up time of the film to be wound and the rotational speed of the take-up roll, the pressure of the film to be wound depends on the length or take-up time of the rolled-up film and the rotational speed of the take-up roll. Is to control to be constant.

Specifically, the pressure uniformity control unit 95 controls the touch roll to be wound at the set pressure at the time of initial winding, and gradually increases the pressure applied by the touch roll to the winding roll as the winding time or the number of rotations of the winding roll increases. While increasing, after a predetermined time or when the rotational speed of the take-up roll reaches the set value, the pressure applied to the take-up roll is gradually reduced again, so that the pressure wound in the entire section is kept constant.

The touch roll 91 described above is a direction away from the take-up rolls 51a to 51c with respect to the touch roll 91 or the guide roll, instead of retreating (the opposite direction to the transfer) with respect to the take-up rolls 51a to 51c. It will be apparent to those skilled in the art that it can be implemented by retreating. In this case, the touch roll moving part 93 is implemented by the winding roll moving part which acts on the winding rolls 51a-51c.

On the other hand, as shown to FIG. 6B and FIG. 6C, there also exists a method of uniformly controlling the incidence angle i of the slit films 3a-3c which inject into the winding rolls 51a-51c. The guide roll 191 is provided to be spaced apart from the winding rolls 51a to 51c by a predetermined interval.

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

Therefore, in order to make the amount of entrained air uniform, the incidence angle should be controlled so as to be wound in a constant state to prevent mixing of air or at least uniformly form entrained air between the slit film and the slit film being wound to prevent winding failure.

If the angle of incidence is too small, the air mixing is too small between the wound film, so that the film sticks. If the angle of incidence is large, the amount of air to be mixed is so large that a defect occurs.

Preferred angles of incidence are on the order of 10 to 25 degrees.

The mixed air volume control unit 190 for controlling the incident angle uniformity is composed of a guide roll 191, a guide roll moving unit 193, and an incident angle uniform control unit 195 similarly to the mixed pressure air control unit 90 for controlling pressure uniformity.

The guide roll 191 is a roll for adjusting the incident angle while guiding the slit films 3a to 3c immediately before being wound on the winding rolls 51a to 51c so as to be spaced apart from the winding rolls 51a to 51c. do.

The guide roll moving unit 193 is installed at one end or both ends of the guide roll 191 like the touch roll moving unit 93 to move the guide roll 191 in the retracted (or forward) direction. It is preferable that it consists of.

As described above, the incident angle uniformity control unit 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 wound amount measuring sensor mounted on the winding rolls 51a to 51c. The guide roll 191 is controlled by calculating the winding wound amount.

The winding wound amount measuring sensor detects a change in the rotational speed of the winding rolls 51a to 51c and the overall length of the wound film. When the incident angle uniformity control unit 195 receives the value, the guide roll 191 is a guide roll. The eastern portion 193 may be retracted according to the amount of winding wound to maintain the incident angle uniformly.

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

Similarly, instead of retreating (counter direction) the guide rolls 191 described above with respect to the take-up rolls 51a to 51c, it may be implemented by retracting the take-up rolls 51a to 51c with respect to the guide rolls 191. It will be apparent to those skilled in the art. In this case, the guide roll moving unit 193 is implemented as a winding roll moving unit acting 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 maintain the incident angle uniformly.

As such, the incident angle uniformity control may be implemented by forward and backward or vertically conveying the guide rolls 191 or the winding rolls 51a to 51c.

1 and 7, the laser slitter 30 includes 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, the heads 33 and 34 are nozzles for irradiating the generated laser beam to the optical film 1, and the reflector 32 is a laser of the laser oscillator 1 It is a mirror that reflects the beams to the heads 33 and 34.

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

The slit head 33 can be added or subtracted according to the number of columns of width. For example, when there are two slit heads 33, the slits are slit up to three rows in width. If you want to slit two rows wide, only one slit head needs to be operated. The width direction distance of the slit head 33 is also adjustable.

In addition, it is preferable that the laser slitter 30 includes the laser dust collector 40 for collecting the gas (smoke) generated during the cutting of the optical film 1.

The laser dust collector 40 includes a suction box 41 disposed around the heads 33 and 34, a dust collecting box 43 for collecting gas, and a pipe connecting the suction box 41 and the dust collecting box 43. It consists of 45.

As shown in FIGS. 8A and 8B, the suction box 41 is a box disposed near the heads 33 and 34 to suction foreign matter (for example, laser fume) due to laser processing.

The dust collecting box 43 is a cylinder in which the laser fume sucked through the suction box 41 is collected.

The pipe 45 is inclined to secure the path of the laser beam. That is, since the piping 45 is arrange | positioned between the laser oscillator 31 and the reflecting mirror 32, the laser beam of the laser oscillator 31 should not be caught by the piping 45. FIG.

Therefore, the pipe 45 has a lower end pipe 45a having one end connected to the suction box 41, an upper end pipe 45b having the other end connected to the dust collecting box 43, and the other end of the lower pipe 45a and the upper end pipe ( It consists of the intermediate inclination pipe | tube 45c which connects one end of 45b).

In addition, the intermediate inclination pipe 45c is inclined obliquely, so that smoke of a sticky nature that is sucked is not easily caught. Therefore, the cleaning time of the piping 45 which is difficult to clean can be shortened, the preparation time for operation is shortened, and productivity is improved.

Pipe 45 is supported on the pipe bracket 47 is fixed on the laser slitter 30,

The pipe bracket 47 extends downward from one end of the horizontal pipe bracket 47a for supporting the upper pipe 45b and the vertical pipe bracket fixed to the main body of the laser slitter 30. It consists of 45b. Therefore, the pipe bracket 47 is simple in shape by bending twice.

At this time, the lower pipe (45a) is stainless, intermediate slope pipe (45c) is aluminum or cast iron, the upper pipe (45b) is preferably implemented in a material of PVC.

On the other hand, the entire pipe 45 may be made of a plastic-based material, particularly PVC. Plastic has a slippery property, so sticky laser fume does not stick well, and foreign materials are not easily loaded in the pipe.

In addition, the pipe 45 may be made of a plastic-based metal-based material to prevent the accumulation of foreign matter. At this time, the metal is preferably implemented in stainless steel or steel.

On the other hand, the optical film 1 to be transferred may cause wave vibration when passing through the laser slitter 30. If this vibration occurs on the irradiation side, the quality is affected. That is, when the laser slit, the vibration width of the optical film 1 should be within ± 300 to ensure stable quality. This is usually caused by a large vibration when the distance between the guide roll R2 and the guide roll R3 disposed between the laser slitters 30 becomes large.

The distance between the guide roll R2 and the guide roll R3 is set and the rolls R2 and R3 near the laser slitter 30 due to the laser heads 33 and 34 and the suction box 41. It is also not easy to approach.

In order to solve this problem, as shown in FIGS. 8A to 8C, it is preferable that the anti-vibration contact member 35 is disposed 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 transferred in a straight form.

The upper roll 36 is preferably disposed on both sides (both in the width direction) of the laser beam irradiated to the optical film 1.

Therefore, since the upper rolls 36 on both sides are below the irradiated portion of the laser beam, the optical film 1 to be conveyed is moved up and down in contact with each other so as to suppress wave vibrations, so that the distance between the irradiated portion and the optical film is reduced. Keep it as constant as possible so that no error occurs due to the slit.

In particular, the upper roll 36 is disposed close to the irradiation section, and its vibration suppressing effect is very excellent.

In addition, since the upper roll 36 is mounted to the suction box 41 using the roll bracket 38, a mounting space is not necessary separately.

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

The lower roll 37 is disposed on the lower surface of the optical film 1 and the lower surface of the slit films 3a to 3c, respectively, and can reliably prevent wave vibrations up and down. The lower roll 37 is disposed in front and rear (length direction or transfer direction) of the laser slitter 30 so as to be implemented as a cylindrical roll to also function as a guide roll.

In this way, the upper roll 36 and the lower roll 37 was confirmed to have an effect of suppressing the vibration of the irradiated portion by acting as a reinforcement roll up to 80 m / min feed rate using a vibration check meter.

On the other hand, the present invention includes a center position control (CPC) system to prevent meandering of long (long length) film in order to more precisely correct wrinkles, deflection, deformation, etc. of the slit film (3a ~ 3c) to be wound do. The CPC system detects the edge edges of the optical film 1 or the slit films 3a to 3c with an air servo sensor or an optical sensor, and controls the conveying direction based on the information, so that the center of the film in the width direction is constant. In order to be a conveying position, specifically, as an actuator thereof, meandering correction is performed by shaking one or two guide rolls or a flat expander roll having a drive left and right (or up and down) with respect to the line direction, Two sets of pinch rolls are provided (one is provided on the front and back side of the film, which are on both sides of the film), and the film is sandwiched between them to correct the tension meandering (cross guider method). The principle of meandering correction of these devices is that in the former method, the film is tilted so that the film is directed to the right while the film is going to the left, for example, and in the latter method, the set of pinch rolls on the right is nip. To the right.

9A and 9B, the CPC system 80 of this embodiment includes a CPC sensor 81 disposed at both edges of the slit films 3a to 3c to be transferred, and a slit film from the CPC sensor 81. The drive cylinder 85 which adjusts the position of the control part 83 which receives input of the center deviation of 3a-3c, and the guide roll 89 which is driven by the control part 83, and guides the slit films 3a-3c. ).

The CPC sensor 81 has a projector 81a having a light emitting portion 82a disposed below the slit films 3a to 3c, and a detector having a light receiving portion 82b disposed above the slit films 3a to 3c. It consists of 81b. At this time, the light emitting portion 82a and the light receiving portion 82b are mounted with 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 detector 81b is at least longer than the width of the slit films 3a to 3c as shown in FIG. 9C, so that the CPC sensor 81 is independent of the variation in the width of the slit films 3a to 3c. You can detect this without moving).

By this configuration, the light emitted from the light emitting portion 82a detects the amount of light entering the light receiving portion 82b and centers it. For example, when it is judged that the sensor is not correct when the light coming from the left and the light coming from the right are not received the same, the driving cylinder 85 moves the guide roll 89 to the left or right to align the center.

Therefore, since the width of each width of the slit films 3a to 3c can be slit in various ways depending on the use, the CPC sensor 81 does not need to move to the corresponding position even if the width is changed, thereby reducing the operation time. Minimize the time loss caused by

This CPC system 80 is applicable not only to the slit films 3a to 3c but also to the optical film 1 between unwinding and laser processing. Of course, the EPC (edge position control) system 20 is preferably used 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 surface of the laser slits slit films 3a to 3c swells due to heat fusion or the like compared to other surfaces.

When the swollen slit films 3a to 3c are wound in this way, both edges (edges) overlap thicker than the center portion, and thus take a concave shape toward the center (see FIG. 10A).

When winding up in such a concave shape, it is preferable that the swing member 180 swinging in the width direction of the slit films 3a to 3c is disposed in front of the take-up rolls 51a to 51c in order to solve this problem.

The swing member 180 is wound around the winding rolls 51a to 51c in a zigzag in the width direction edges of the slit films 3a to 3c swinging (see FIG. 10B).

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

That is, the swing member 180 pushes and pulls the guide roll 89 of the CPC system 80 to each other in the width direction as shown in FIG. 9A, or with respect to the transfer direction with respect to the center of the width direction. Swinging like a seesaw from side to side causes the edges to zig-zag. In this case, it is preferable that the swing driving cylinder 185 is further installed separately from the driving cylinder 85. The swing cycle (swing speed) and swing distance of the guide roll 89 are controlled by the controller 83. Of course, a separate swing roll may be implemented instead of the guide roll 89.

Therefore, when the center of the film is swinged with the guide roll 89, the edges are wound while being zigzagly overlapped, and both ends thereof swell up to prevent the poor film from being pressed.

In addition, as shown in (b) of FIG. 10, the zigzag winding is rolled up in an overlapping manner as it moves inward and then comes back inward, so that the swinging portion of the guide roll 89 is easily reduced while the overlapping portion is considerably reduced. It is almost a straight line in the wound width direction as shown in FIG.

Zig-zag overlap form can be implemented in a desired form according to the swing cycle (swing speed) and the swing distance of the guide roll 89 as a control unit as shown in Figure 10a.

First, I of FIG. 10A shows the swing cycle (swing speed) and the maximum swing distance as 1, and II of FIG. 10A makes the swing speed faster so that more pitches (3/2 swing cycles) than 1 pitch are allowed within one swing cycle. Zig-zag overlap to be formed, III in FIG. 10A can be wound up to make the maximum swing distance greater than 1 (W1> W) to make the maximum width wider. At this time, rather than winding the slit film, it is better to wind up while swinging a predetermined length, for example, about 20 to 30m, while swinging.

The initial biswing winding may serve as a base that the initial biswing winding film firmly supports even if the edges overlapped with zigzag are accumulated to some extent, thereby preventing the edges stacked in the stepped form from falling down.

On the other hand, when slitting with a laser, foreign matter, in particular a laser fume, is fused to or near the slit surface.

By scrubbing this fused fume, the cleaner size is made compact, which facilitates the installation and operation of the equipment and improves the performance of the cleaner.

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

The cleaner 10 includes the cloth 71 which touches the foreign material, the cloth unwinding roll 73 which unwinded the cloth 71 in roll shape, and the cloth winding roll 75 which winds up the cloth 71 again in roll shape.

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

In addition, the cloth winding roll 75 is equipped with a servo motor (not shown) to perform winding (of course, the tension can be adjusted according to the rotational speed).

In addition, it is preferable that the ceiling force roll 77 for applying tension to the cloth 71 is mounted on the cleaner bracket 79.

At this time, the cloth winding roll 78, the cloth winding roll 73 and the ceiling force roll 77 are arranged in the order of the feeding direction of the slit films 3a to 3c, the cloth winding roll 78 is the ceiling force roll 77 It is preferable that the inclined cloth 71 between the ceiling roll 77 and the cloth winding roll 75 rubs the foreign matter. Inclination can be adjusted through the height of the ceiling force roll (77).

Since the slanted cloth 71 is gradually rubbed in line contact with the film of the guide roll R3, the removal rate is hardly increased with little resistance to the film transfer, and the film does not touch the film in any part other than the fume. To prevent damage to the source.

On the other hand, it is preferable to forcibly drive the guide rolls as a way to drive the film instead of the nip rollers (rising nip roll and fixed drive roll). This is because the elevating nip roll is not likely to be pressed evenly due to the error of the roll itself or the thickness of the film, which may cause a phenomenon (meaning) of being pushed to the pressed part more. In addition, the nip rollers are cumbersome in that gap adjustment with the driving rolls is required.

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 transmission member, and the second guide roll or the driving roll itself is driven by friction using a large surface roughness Ry. May be implemented.

As shown in Figs. 12 and 13, the film transfer mechanism includes a driving roll (DGR) for driving and feeding the optical film (or slit film), and a plurality of guide rolls (R1 to guiding the optical film (or slit film)). R4) and a power transmission member for transmitting the rotational force of the drive roll (DGR).

Because of this power transmission member, the guide rolls R1 to R4 also function as a driving roll for driving and feeding the optical film (slit film), so that the transfer can be performed without a nip roll.

The power transmission member is a timing belt (TV1) (TV2) connecting the timing pulley (not shown) of the motor (M) for driving the drive roll (DGR) and the timing pulleys (TP1 to TP4) of the guide rolls (R1 to R4). It is preferable that it consists of.

The timing belt TV1 and TV2 transmit 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.

Here, the timing pulley TP4 is provided with two TP4 'and TP4' on one rotation shaft of the guide roll R4, and the first timing belt TV1 and the second timing belt TV2 are engaged.

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

Meanwhile, the guide rolls (R1 to R4) or the driving rolls (DGR) of the film transfer mechanism are made of a material having a large surface roughness with the film, so that the frictional force with the film is increased, thereby forcibly driving the feed instead of the nip roll. Can also be realized.

The surface roughness of the film is 0.4 to 0.8, and the stainless steel surface roughness of the guide roll or the driving roll is about 0.3 to 1, and the surface roughness of the guide roll or the driving roll of this embodiment is more than twice that of stainless steel, preferably about 3 materials. Shall be.

In addition, the incident angle i of the optical film entering the driving roll DGR is 20 degrees or less, preferably 10 degrees, as shown in FIG. 12. This widens the contact area between the optical film and the outer circumferential surface of the drive roll to facilitate forced driving along with surface roughness.

For example, the guide rolls R1 to R4 or the driving roll DGR may be implemented by rubber rolls, or the outer circumferential surface thereof may be covered or coated with a rubber material.

Due to the belt link method or the friction force increasing method, there is an advantage such as preventing the occurrence of meandering and no gap adjustment without using the nip roll. In addition, the lifting device of the nip roll is expensive and complicated, and the space occupied by the system of the nip roll and the lifting device is also reduced.

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

As shown in FIG. 3, the optical film slitting process is mainly performed by unwinding the optical film 1 from the disc roll 11 and unwinding the optical film 1. Laser slitting process for trimming and slitting with a plurality of slit films 3a to 3c and trim film 5, a trimming process for discharging trim film 5, and a slit film 3a to 3c ), And a cleaning step of removing the foreign matter adhering to the &lt; RTI ID = 0.0 &gt;), &lt; / RTI &gt; and a winding step of winding the slit films 3a to 3c from which the foreign matter has been removed on each of the winding rolls 51a to 51c.

At this time, through the edge position control (EPC) process for controlling the edge position of the optical film 1 to be unwound before the slitting is transferred straight to the laser slitting process to ensure quality improvement during slitting. In addition, the winding process may be wound up to some extent straight from the beginning and then wound so as to zigzag the edge portions with each other while swinging.

Further, the center position control (CPC) step of controlling the center position of each of the slit films 3a to 3c transferred in the cleaning process is performed so that the slit films 3a to 3c are stably applied to the take-up rolls 51a to 51c. It is odor and improves product quality.

On the other hand, the trim treatment process is made of a trim film conveyor process for transporting and discharging the trim film 1 to be cut into the basket (9).

Due to this trim film conveyor process, the trim film 5 can be automatically processed to improve productivity.

The trim film conveyor process includes a trim film transfer process for transferring the trim film 5 to the horizontal conveyor 61 and a trim film 5 transferred from the horizontal conveyor 61 to an inclined conveyor 63. The process of discharging the trim film to be transported and discharged into the basket 9 may increase the collection capacity of the trim film.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art various modifications or variations of the present invention without departing from the spirit and scope of the invention described in the claims below Can be carried out.

For example, although the present embodiment has been described with respect to the laser slitter, it will be apparent to those skilled in the art that the laser slitter may be implemented as a cutting blade slitter.

The tension proportional value setting for each equipment function of the present invention is applicable to any roll-to-roll equipment for slitting flexible materials.

1: Optical film 3a ~ 3c: Slit film
4: Pipe 4a: Pipe Bracket
5: trim film 7: discharge roller
8: CPC System 8a: Projector
8b: Detector 9: Basket (garbage box)
10: unwinder 11: disc 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 box 45: piping
45a: Lower piping 45b: Upper piping
45c: intermediate slope piping 47: piping bracket
47a: Horizontal piping bracket 47b: Vertical piping bracket
50a-50c: Winding machine 51a-51c: Winding roll
60: trim processor (trim film conveyor) 61: trim film horizontal conveyor
63: Trim Film Incline Conveyor 70: Cleaner
71: cloth 73: cloth rolls
75: cloth winding roll 77: ceiling force roll
79: cleaner bracket 80: CPC system
81: CPC sensor 81a: projector
81b: detector 82a: light emitting unit
82b: light receiving unit 83: control unit
85: driving cylinder 89, 191: guide roll
90,190: mixed air volume control unit 91: touch roll
93: touch roll moving unit 95: pressure uniform control unit
191: guide roll 193: guide roll moving part
195: incident angle uniformity control unit 180: swing member
185: swing driving cylinder A: unwinding nip roller
B: unwind feed nip roller C1-3: 1-3 feed nip roller
a: unwinding section b: unwinding feed section
c1 ~ c3: 1 ~ 3 winding feed section d1 ~ d3: 1 ~ 3 winding section

Claims (8)

A take-up machine in which a disc roll of the optical film is installed;
A slitter that slits the optical film unwound from the unwinder in a feed direction and is cut into a plurality of slit films;
Including a plurality of winding machines for winding the plurality of slit films on each winding roll,
The tension ratio of the film is an optical film slitting system set differently for each of the unwinding section, feed section and winding section.
The method of claim 1,
An optical film slitting system in which the tension ratio of the film is set to unwinding section <feed section or unwinding section <winding section.
The method of claim 2,
The tension ratio of the film
Unwinding section: Feed section = 1: 1.01 to 1.2 or Unwinding section: Winding section = 1: Optical film slitting system set to 1.01 to 1.5.
4. The method according to any one of claims 1 to 3,
The unwinding section is a section between the disc roll and the unwinding nip roller,
The feed section includes a take-up feed section that is a section between the take-up nip roller and a take-up feed nip roller, and a take-up feed section that is a section between the take-up feed nip roller and a take-up feed nip roller.
The winding section is an optical film slitting system consisting of a section between the winding feed nip roller and the winding roll.
The method of claim 4, wherein
The slitter is an optical film slitting system is a laser slitter.
The method of claim 4, wherein
And said slitter is a cutting blade slitter.
The method of claim 4, wherein
An optical film slitting system further combining the tension values of the unwinder, slitter and winder set according to the width per unit length of the film.
The method of claim 7, wherein
The slitter further cuts the trim film trimmed by slitting the edges of the optical film,
Optical film slitting system further sets the tension value according to the width per unit length of the trim film.

Images