KR20170081550A - Film classification systems and methods - Google Patents

Abstract

One embodiment of the present invention relates to a film classification system and method. According to an embodiment of the present invention, there is provided a cutting apparatus for cutting a original film into a predetermined plurality of rows to form a sheet film; A sorting device for sorting the sheet film into a good product and a defective product during the movement of the sheet film; And a control unit for controlling the sorting apparatus based on information on the movement of each of the sheet films.

Description

[0001] FILM CLASSIFICATION SYSTEMS AND METHODS [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film sorting system and method, and more particularly, to a system and method for checking whether a polarizing film is defective.

The optical film has a problem in manufacturing or handling. Micro defects such as irregular defects such as scars generated in the film in the film forming step may be expressed as coating defects when the alignment layer coating liquid or the liquid crystal coating liquid is applied in the coating step. Further, coating defects due to micro-defects of the film deteriorate optical properties of the optical film as the final product.

Failure of the optical film is a main cause of defective LCD panel or PDP module. In order to prevent leakage of the optical film containing such defective elements, optical film manufacturers are increasingly introducing and applying an optical film automatic inspection apparatus for the inspection process.

There are two methods for inspecting the optical film. One is a method of inspecting the optical film produced in the continuous process before cutting the optical film, and the other is cutting the optical film into a proper size, Which is a sheet inspection method.

In the conventional inspection process, only up to two rows were possible in the inspection in the sheet state. It was impossible to inspect in three or more rows of sheets or, if possible, a high misjudgment rate. Therefore, there is a problem that the efficiency of the optical film inspection and classification method is inferior.

Korean Patent Publication No. 10-2010-0135788 (December 27, 2010)

Embodiments of the present invention seek to provide a film sorting system and method that efficiently classifies good and defective products of a polarizing film.

It is also intended to provide a film classification system and method that can be automatically classified even in three or more rows.

Further, it is an object of the present invention to provide a film classification system and method that can shorten the time because the inspection apparatus, the cutting apparatus, and the sorting apparatus are configured in-line.

According to an embodiment of the present invention, there is provided a film sorting system and method, comprising: a cutting device for cutting a original film into a predetermined plurality of rows to form a sheet film; A sorting device; And a control unit for controlling the sorting apparatus based on information on the movement of each of the sheet films.

Further, the cutting device is capable of cutting the original film into at least three rows.

In addition, the above-described sorting apparatus includes an air injecting apparatus, and the air injecting apparatus includes a plurality of air nozzles, so that an air nozzle corresponding to a row of defective sheet films can be operated.

The control unit may include an inspection device for detecting a defective mark or a foreign substance on the raw film and outputting a detection signal, and a control unit for receiving information from an encoder for measuring the speed of the facility where the original film moves, The device can be controlled.

In addition, the above-described sorting device may receive air from the air nozzle by receiving information corresponding to the classification time point and the defective film sequence calculated from the control section.

In addition, a plurality of the air nozzles may be arranged for each row corresponding to each of the plurality of sheet films.

Further, the sorting device may include a first conveyer for conveying the sheet film cut into a plurality of rows to the air ejection device, a second conveyer for conveying the good sheet film, and a third conveyer for conveying the bad sheet film .

In addition, the above-described sorting device may include a first nip roll that prevents interference of the film caused by warpage of at least three rows of the sheet film when passing through the air injection device.

In addition, the sorting device may include a deflection guide to help the sheet film stably enter the first nip roll.

In addition, the second conveyor may include a second nip roll to prevent the defective film, which is previously classified in the third conveyor, from being interfered with the continuously injected air.

According to another embodiment of the present invention, in the film sorting system and method, the original film is cut into a predetermined number of rows by a cutting device to become a sheet film state, And a defective product, and the sorting device is controlled by a control unit based on the movement status information of each of the sheet films.

Further, the original film can be cut into at least three rows of sheet films by the cutting device.

Further, based on the detection signal of a bad mark or foreign object on the raw film detected by the inspection apparatus and the speed of the facility where the original film transferred by the encoder moves, Can be controlled.

Further, the air injection device of the sorting device is operated by receiving the cutting coordinates and the sorting time point from the control part, and the corresponding air nozzle of the heat to be sorted can be operated.

Further, the cut sheet film can be prevented from interfering with the warp of the film by the first nip roll when passing through the air injection device.

Further, the cut sheet film can stably enter the first nip roll by the warping guide when passing through the air injection device.

Further, the sheet film cut into a plurality of rows by the cutting device is conveyed to the air ejection device by the first conveyor, the sheet film of the good product passing through the air ejection device is conveyed to the second conveyor, The defective sheet film passing through the injection device can be transferred to the third conveyor.

In addition, the defective sheet film conveyed to the third conveyor can be prevented from interfering with the air continuously injected by the second nip roll.

According to the embodiments of the present invention, good and defective products of the polarizing film can be classified.

In addition, it can be classified automatically in three or more rows.

Further, since the inspection apparatus, the cutting apparatus, and the sorting apparatus are configured in-line, the time can be shortened.

1 shows a film classification system according to an embodiment of the present invention;
2 is a view showing an air injection device of a film sorting system according to an embodiment of the present invention;
3 is a view showing a nip roll and a deflection guide of an air injection device according to an embodiment of the present invention;
4 is a view showing the operation of the nip roll and the bending guide of the air injection device according to the embodiment of the present invention;
5 is a flowchart showing a film classification method according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, this is merely an example and the present invention is not limited thereto.

In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intention or custom of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

The technical idea of the present invention is determined by the claims, and the following embodiments are merely a means for effectively explaining the technical idea of the present invention to a person having ordinary skill in the art to which the present invention belongs.

1 is a diagram of a film classification system 100 in accordance with an embodiment of the present invention.

The film sorting system 100 senses the defective marks 15 and foreign substances imparted to the film, and classifies the good film and the defective film according to the inspection result.

Referring to FIG. 1, the film sorting system 100 may include an inspection apparatus 20, a control unit 30, a cutting apparatus 40, and a sorting apparatus 50. The film classification system 100 may be capable of inspecting, cutting and sorting films in one in-line at a time.

Defective marks 15 may be present on the original film 10 at defective portions such as fine defects or foreign matters. The original film (10) passes through the first guide roll (11) and the inspection device (20).

The inspection apparatus 20 can detect a defective mark 15 on the original film 10 or a foreign object or the like and output a signal to the control unit 30. [ The inspection apparatus 20 may include a photographing means 21 and a light source device 22. [ The defective mark 15 can be detected by the photographing means 21 and the light source device 22. [ The inspection apparatus 20 senses the defective mark 15 or foreign matter existing on the disc in the disc state, and transmits it to the control section 30.

In addition, the original film 10 can be further engraved with the product mark 16 by the mark marking facility 14.

The original film 10 is conveyed along the second guide roll 12 and the third guide roll 13 in the direction of the cutting device 40. The original film 10 can pass through the conveying rollers 42 and 43 disposed just before the cutting device 40. [ The original film 10 passes between the first conveying roller 42 and the second conveying roller 43 and can enter the cutting device 40 in a state in which the warp of the film is opened.

The cutting device 40 can cut the original film 10 into a predetermined plurality of rows. When the original film 10 is cut by the cutting device 40, it may be in the form of a plurality of rows of sheet films 41. [ At least three or more sheet films 41 may be formed. The sheet film 41 cut by the cutting device 40 can be transported in the direction of the sorting device 50 by the first conveyor 44. [

An encoder 45 may be disposed around the cutting device 40. [ The encoder 45 transmits production rate data of the facility to the control unit 30 in real time. For example, the distance from the inspection apparatus 20 to the cutting apparatus 40 may be determined. The encoder 45 reads out the original film 10 from the inspection apparatus 20 to the cutting apparatus 40 on the basis of the distance determined from the inspection apparatus 20 to the cutting apparatus 40 Speed data to the control unit 30 in real time.

The control unit 30 can control the classifying device 50 based on the moving state information of each of the sheet films 41. [ The control unit 30 can calculate the information transmitted from the inspection apparatus 20 and the encoder 45 and control the classification apparatus 50. [

The control unit 30 receives the defective mark 15 or the foreign matter sensed signal from the inspection apparatus 20 and calculates the position where the film is cut at the cutting apparatus 40 so as to know in which row the defective film is cut . Further, the control unit 30 can automatically determine the time at which the equipment film speed 10 data is received and sorted from the encoder 45.

The control unit 30 can transmit a signal to the classifying device 50 as to the coordinates of the column to be cut and the time to be classified as calculated from the testing device 20 and the encoder 45. [ The classifying device 50 can classify the heat and the time point at which the film to be classified arrives from the controller 30.

The classification device 50 receives information from the control section 30 and can classify the good film and the bad film by using the air injection device 51. [ The classifying device 50 may include an air injector 51.

The air injection device 51 may include an air nozzle 52. [ A plurality of air nozzles 52 may be formed. A plurality of air nozzles 52 may be formed for each of the plurality of sheet films 41, and may have column-specific nozzle numbers required for the sorting operation. The defective mark 15 can be operated to eject air only through the air nozzle 52 of the heat-passing sheet film 41.

The sorting device 50 can sort the film conveyed in the first conveyor 44. [ The sorting device 50 may include a second conveyor 56 for conveying the good sheet film and a third conveyor 57 for conveying the bad sheet film.

The coordinates of the classification column and the classification time point are automatically calculated by the signal received from the control unit 30 so that the good sheet film is conveyed to the second conveyor 56 and the bad sheet film is conveyed to the third conveyor 57. [

The sorting device 50 may include a first nip roll 53, a second nip roll 54, and a deflection guide 55.

In order to prevent warping of the film and interference of the air nozzle 52 when the film having the warping characteristic passes through the air nozzle 52, the first conveyor 44, which is adjacent to the air injector 51, (53) or a flexure guide (55). The first nip roll 53 may be formed in a cylindrical shape and disposed at one side of the first conveyor 44 adjacent to the air injection device 51 in a direction parallel to the air injection device 51.

The deflection guide 55 can help the sheet film 41 to stably enter the first nip roll 53. [ If the film enters the first nip roll 53 directly with the warp of the film, the film may be damaged.

The second nip roll 54 may be formed in the third conveyor 57. The second nip roll 54 can safely transport the defective film that is classified by the air ejection device 51.

More specifically, if there is a failure film in the same row two or more times in succession and it is necessary to classify the film by the air injection device 51, the second nip roll 54 can prevent air flow It can interfere. The second nip roll 54 may be disposed to prevent the film that was first sorted and conveyed to the third conveyor 57 from being subjected to the interference of the air that is then injected into the defective film .

The third conveyor 57 can be fed with the defective sheet film classified by the air ejection device 51. [ The defective sheet film conveyed along the third conveyor 57 can be conveyed to the defective tray 58.

The defective storage boxes 58 are arranged so as to correspond to a plurality of rows, respectively, and can store the sheet film 41 classified as defective in each row. The thus-stored bad sheet film can be checked and sorted once again.

2 is a view showing an air injection device 51 of the film sorting system 100 according to an embodiment of the present invention.

Referring to FIG. 2, a plurality of sheet cutting lines 41 may be formed by a plurality of cutting lines. The sheet film 41 may be cut into at least three or more rows.

The air injection device 51 can use an air injection method that is not limited to the film transferring heat. The air ejection device 51 may include a plurality of air nozzles 52 so as not to affect the films of other rows. The air nozzles 52 can number the thermal nozzles necessary for the sorting operation. The plurality of air nozzles 52 can be operated separately and only the air nozzle 52 of the row corresponding to the defective sheet film 41 which needs to be conveyed to the third conveyor 57 can be operated.

More specifically, when the sheet film 41 between the first row of cut lines and the second row of cut lines is defective, an air nozzle (corresponding to the nozzle numbers N2, N3, N4) for feeding to the third conveyor 57 52).

Table 1 below shows the operation of the air nozzle 52. 3 is a table showing the operation of the air nozzle 52 with respect to the three rows of the sheet films 41. Fig.

District NN1 NN2 NN3 NN4 NN5 NN6 NN7 NN8 NN9 NN10 NN11 NN12 NN13 Column 11
action Column 22
action Column 33
action

N2, N3 and N4 of the air nozzles 52 can be operated when the sheet film 41 in one row is defective as shown in Table 1. When the sheet films 41 in two rows are defective, N10, N11 and N12 of the air nozzle 52 are operated when the three rows of the sheet films 41 are defective and the defective sheet film 41 is moved to the third conveyor (57). The defective sheet film 41 transferred to the third conveyor 57 may be stored in the defective storage box 58.

Specifically, the air nozzle 52 may be used depending on the area where the sheet film 41 is cut. In the case of the sheet film 41 having a small area, three or less air nozzles 52 may be used. Further, in the case of the sheet film 41 having a large area, three or more air nozzles 52 may be used. For example, when the area of the sheet film 41 is narrow, two air nozzles 52 may be used. N1 and N2 are used as one row of air nozzles 52 and N5 and N6 are used as two rows of air nozzles 52 and N9 and N10 may be used as three rows of air nozzles 52. [ Therefore, unused air nozzles 52 such as N3, N4, N7, N8, N11, N12, and N13 may occur. The unused air nozzles 52 are not fixed, but can be determined by the size of the sheet film 41, the heat to be cut, and the like. The air nozzles 52 positioned between the adjacent rows are not used, so that the air ejected from the air nozzles 52 can be prevented from affecting the sheet film 41 of another row.

Conversely, when the area of the sheet film 41 is widely cut to form three rows, air nozzles N1, N2, N3, and N4 in one row can jet air, and two rows of air nozzles 52 N5, N6, N7 and N8 can inject air, and three rows of air nozzles 52, N9, N10, N11 and N12 can inject air.

The air nozzle 52 used may be changed in accordance with the convenience of the sheet film 41, the number of the rows to be cut, the position, and the like.

However, the number of the air nozzles 52 is not limited to 13, but may be more or less, and the number of the air nozzles 52 arranged in each column may be changed.

3 is a view showing the nip rolls 53 and 54 and the deflection guide 55 of the sorting device 50 according to an embodiment of the present invention.

Referring to FIG. 3A, the first nip roll 53 may be disposed at one side of the first conveyor 44 adjacent to the sorting device 50.

The first nip roll 53 can prevent the breakage of the film and the air nozzle 52 just before the air injection. The first nip roll 53 interferes with the air nozzle 52 due to the warping of the film when the film having the bending characteristic passes through the air nozzle 52 to prevent the air nozzle 52 from being broken or the film being damaged can do.

The first nip roll 53 may be formed in a cylindrical shape or may be rotatable. When the sheet film 41 is fed, the first nip roll 53 rotates and presses the sheet film 41, thereby flexing the film.

In addition, the sheet film 41 may include a warp guide 55 so that the sheet film 41 can stably enter the first nip roll 53. If the sheet film 41 is momentarily brought into contact with the first nip roll 53 while maintaining the warpage, the sheet film 41 may be damaged by the warping of the film. Therefore, to prevent this problem, it may include a deflection guide 55 that can assist in entry into the first nip roll 53.

As a result, the sheet film 41 is conveyed along the first conveyor 44 in the direction of the air injector 51, and enters the first nip roll 53 along the warp guide 55, so that the warp can be spread.

3B, the sheet film 41 of good product classified by the air injection device 51 is conveyed to the second conveyer 56, and the defective sheet film 41 is conveyed to the third conveyor 57 . A second nip roll 54 may be disposed on the third conveyor 57.

The second nip roll 54 can prevent breakage of the transported film after the air jetting. In the second nip roll 54, two or more consecutive defective films are generated, and when the air is injected two or more times in succession, the film is blown or released during the conveyance of the old film by the pressure of strong air from the third conveyor 57 It is possible to prevent breakage of the film due to the phenomenon that the film is damaged.

More specifically, when the defective sheet film 41 is arranged and classified in the same row of the sheet film 41, the air nozzle 52 continuously blows air. At this time, the second nip roll 54 is disposed so that the sheet film 41 that has been classified and conveyed to the third conveyor 57 is interfered with by the air to be ejected next, or is not released from the third conveyor 57 can do.

The defective sheet film 41 sorted by the second nip roll 54 can be stably placed in the defective tray 58 without leaving the third conveyor 57. [

4 is a diagram illustrating the overall operation of the nip rolls 53 and 54 and the deflection guide 55 of the sorter 50 in accordance with one embodiment of the present invention.

4, the sheet film 41 can stably enter the first nip roll 53 along the warp guide 55, and the sheet film 41 is stretched by the first nip roll 53 And can be classified in the air injection device 51. The good sheet film 41 is continuously conveyed to the second conveyer 56 and the defective sheet film 41 can be conveyed to the third conveyor 57. [

The third conveyor 57 includes the second nip roll 54 to prevent the sheet film 41 from interfering with the air ejected from the air nozzle 52 and to prevent the sheet film 41 from being stably loaded 58, respectively.

5 is a flowchart illustrating a film classification method according to another embodiment of the present invention.

Referring to FIG. 5, the inspection step S1 for inspecting the defective mark 15 or foreign matter of the sheet film 41 using the inspection apparatus 20 may be included.

The inspection apparatus 20 senses the defective mark 15 or a foreign object and transmits a signal to the control unit 30. The encoder 45 transmits production rate data of the facility to the control unit 30 in step S2.

The controller 30 can calculate the coordinates of the row in which the defective sheet film 41 is cut and the time point at which the defective sheet film 41 is sorted (S3).

The cutting device 40 can cut the disc-shaped film into a sheet-shaped film (S4). A plurality of sheet films 41 may be formed by the cutting device 40, and a plurality of rows thereof may be formed.

The classification device 50 can be controlled by the information calculated by the control section 30. [ The sorting device 50 receives the information from the control unit 30 and can classify it as good or defective of the sheet film 41 (S5). The sorting device 50 includes a plurality of air nozzles 52 and a plurality of air nozzles 52 may be formed for each row of the sheet films 41. [

The plurality of air nozzles 52 can be operated only at the corresponding air nozzles 52 requiring the sorting operation. The good sheet film 41 in the sorting apparatus 50 is conveyed to the second conveyor 56 and the bad sheet film 41 can be conveyed to the third conveyor 57 by the air jetting device 51. [

Therefore, the present invention can work the inspection, cutting and sorting work of the film at once in in-line, thereby shortening the time and improving the convenience. In addition, it is also possible to cut at least three rows of the transferring heat and to arrange the corresponding air nozzles 52 for each row, thereby efficiently classifying the film using an air spraying method which is not limited by other film lines . In addition, the injector 50 includes nip rolls 53 and 54 to prevent bending of the film or interference with the air, thereby stably sorting the film and increasing the accuracy of the sorting.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, . Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by equivalents to the appended claims, as well as the appended claims.

100: Film classification system
10: original film
11: first guide roll
12: second guide roll
13: Third guide roll
14: Drawing mark equipment
15: bad mark
16: Product Drawing Mark
20: Inspection device
21: photographing means
22: Light source device
30:
40: Cutting device
41: sheet film
42: First conveying roller
43: 2nd conveying roller
44: First conveyor
45: Encoder
50: Classifier
51: air injection device
52: Air nozzle
53: first nip roll
54: second nip roll
55: flexure guide
56: Second conveyor
57: Third conveyor
58: Bad loading

Claims (18)

A cutting device for cutting the original film into a predetermined number of rows to form a sheet film;
A sorting device for sorting the sheet film into a good product and a defective product during the movement of the sheet film; And
And a control unit for controlling the sorting device based on the movement status information of each of the sheet films
Including a film classification system. The method according to claim 1,
Wherein the cutting device is capable of cutting the original film into at least three rows. The method according to claim 1,
Said sorbing device comprising an air jet device,
Wherein the air injection device includes a plurality of air nozzles to operate an air nozzle corresponding to a row of defective sheet films. The method according to claim 1,
Wherein,
An inspection device for detecting a defective mark or foreign substance on the raw film and outputting a detection signal; a control unit for receiving information from an encoder for measuring the speed of the facility where the original film moves, Classification system. The method of claim 4,
The sorting device includes:
Wherein the information about the classification time point and the defective film sequence calculated from the control unit is received and air is supplied through the air nozzle. The method of claim 5,
Wherein a plurality of the air nozzles can be arranged for each column corresponding to each of the plurality of sheet films. The method of claim 6,
The sorting device includes:
A first conveyor for conveying the sheet film cut into a plurality of rows to the air injection device;
A second conveyor for conveying the good sheet film;
A third conveyer for conveying the defective sheet film;
Including a film classification system. The method of claim 7,
The sorting device includes:
Wherein at least three rows of the sheet film include a first nip roll that prevents interference with the film due to warpage when passing through the air injection device. The method of claim 8,
The sorting device includes:
And a deflection guide to help the sheet film stably enter the first nip roll. The method of claim 7,
And a second nip roll that prevents the poor film first classified in the third conveyor from being interfered with the continuously injected air. The original film is cut into a predetermined number of rows by the cutting device to become a sheet film state,
Wherein the sheet film is classified into a good product and a defective product by a sorting device during a moving process,
Wherein the sorting device is controlled by a control unit based on the movement status information of each of the sheet films. The method of claim 11,
Wherein the original film is cut into at least three rows of sheet films by the cutting device. The method of claim 11,
A control unit for controlling the sorting device based on a detection signal relating to a defective mark or foreign object on the raw film sensed by the inspection device and a speed of the equipment to which the original film transferred by the encoder moves, / RTI > 14. The method of claim 13,
Wherein the air injection device of the sorting device is operated by receiving the cutting coordinates and the classification time point from the control part, and the corresponding air nozzle of the heat to be sorted is operated. 15. The method of claim 14,
Wherein the cut sheet film is prevented from interfering with the warping of the film by the first nip roll when passing through the air injection device. 16. The method of claim 15,
Wherein the cut sheet film stably enters the first nip roll by a warping guide when passing through the air injection device. 15. The method of claim 14,
Wherein the sheet film cut into a plurality of rows by the cutting device is conveyed to the air ejection device by a first conveyor,
Wherein the sheet film of the good product passing through the air injection device is conveyed to the second conveyor and the poor sheet film passing through the air injection device is conveyed to the third conveyor. 18. The method of claim 17,
Wherein the defective sheet film conveyed to the third conveyor is prevented from interfering with air continuously injected by the second nip roll.

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