SK50132008A3 - Device for cutting optical film and method for production of optical film - Google Patents

Device for cutting optical film and method for production of optical film Download PDF

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Publication number
SK50132008A3
SK50132008A3 SK5013-2008A SK50132008A SK50132008A3 SK 50132008 A3 SK50132008 A3 SK 50132008A3 SK 50132008 A SK50132008 A SK 50132008A SK 50132008 A3 SK50132008 A3 SK 50132008A3
Authority
SK
Slovakia
Prior art keywords
optical film
sheets
cutting
long
cutting apparatus
Prior art date
Application number
SK5013-2008A
Other languages
Slovak (sk)
Inventor
Masaharu Mori
Satoshi Ohira
Yuichi Shiraishi
Atsuhiko Shinozuka
Original Assignee
Sumitomo Chemical Company, Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP2007037542A priority Critical patent/JP2008200788A/en
Application filed by Sumitomo Chemical Company, Limited filed Critical Sumitomo Chemical Company, Limited
Publication of SK50132008A3 publication Critical patent/SK50132008A3/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00Pile receivers
    • B65H31/04Pile receivers with movable end support arranged to recede as pile accumulates
    • B65H31/08Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled one above another
    • B65H31/10Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled one above another and applied at the top of the pile
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00Pile receivers
    • B65H31/30Arrangements for removing completed piles
    • B65H31/3054Arrangements for removing completed piles by moving the surface supporting the lowermost article of the pile, e.g. by using belts or rollers
    • B65H31/3063Arrangements for removing completed piles by moving the surface supporting the lowermost article of the pile, e.g. by using belts or rollers by special supports like carriages, containers, trays, compartments, plates or bars, e.g. moved in a closed loop
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00Handling processes for sheets or webs
    • B65H2301/40Type of handling process
    • B65H2301/42Piling, depiling, handling piles
    • B65H2301/421Forming a pile
    • B65H2301/4217Forming multiple piles
    • B65H2301/42172Forming multiple piles simultaneously

Description

1 1 # m-oi

Optical film cutting apparatus and optical film manufacturing method

Technical field

The present invention relates to an embossing apparatus which cuts a plurality of sheets of an optical film from a long optical film and a method for producing an optical film.

Background Art

Polarized film-typed optical films and a phase-shift film are an important optical component from which the liquid crystal screen is composed. Usually, a long optical film which is a raw material in the manufacture of a cut sheet of optical film using a cutting device. Cutting equipment requires high-speed optical film cutting and excellent productivity and yield.

For example, Japanese Patent Application 2004-188552 discloses a sheet-cutting apparatus comprising a raw material delivery means, a cutting means that cuts a coiled long sheet delivered from a raw material delivery device to pre-determined sheet sizes and a stacking means that stacking leaves cut by a cutting tool. The cutting means comprises a rotating cutter which cuts a long sheet in a width direction with a predetermined width and a knife cutter (guillotine knife) which longitudinally cuts the length of the sheet in a width direction with a predetermined length.

However, there is a problem where cuttings are easily formed when cutting in a cutter. When the length of the optical film sheet is cut using a sheet-cutting apparatus disclosed in Japanese Patent Application 2004-188552, cuttings 2 are easily formed and flaws are produced which result from cut-offs on the surface of the optical film and reduce productivity and yield. In the stacking composition, when an optical film in which the cuttings are adhered to the surface of the optical film is compressed with many other optical films, the cuttings are cut into the optical film over the width of the assembled optical films, thereby causing damage to the optical film.

It is therefore necessary for the cutting to take place at a rate at which cuttings are difficult to form when the optical film is cut lengthwise using a cutting apparatus disclosed in Japanese Patent Application 2004-188552. That is, the length of the optical film must not be cut at high speed using the cutting apparatus disclosed in Japanese Patent Application 2004-188552.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide an optical film cutting apparatus that can cut an optical film at high speed with excellent productivity and yield and an optical film manufacturing method.

A first aspect of the present invention is an optical film cutting apparatus which cuts a plurality of sheets of optical film from a long optical film, the optical film cutting apparatus comprises a roll with an optical film raw material, a slit that cuts a long optical film supplied from a roll of raw optical film material in a direction of transport of the optical film with a predetermined width; a cross cutter which cuts the entrained long optical film in a direction perpendicular to the transport direction of the optical film with a predetermined length; a separate conveyor belt which separately transports a plurality of sheets of optical film such that the sheets of the optical film do not overlap with each other, the sheets of the optical film 3 are cut from the entrained long optical film using a cross cutter; a pair of cleaning rollers that remove foreign material adhered to the separately transported sheet of optical film; and a stacking unit that stacks the sheets of optical film in which the foreign material is removed.

A second aspect of the present invention is an optical film cutting apparatus which cuts a plurality of sheets of optical film from a long optical film, the optical film cutting apparatus comprises a roll of raw optical film material, a slitter that cuts a long optical film supplied from a roll of raw optical film material in a direction of transport of the optical film with a predetermined width; a cross cutter which cuts the entrained long optical film in a direction perpendicular to the transport direction of the optical film with a predetermined length; a separate conveyor belt which separately transports a plurality of sheets of optical film such that the sheets of optical film do not overlap with each other, the sheets of optical film being cut from the entrained long optical film by means of a cross cutter; a pair of cleaning rollers that remove foreign material adhered to the separately transported sheet of optical film; and a stacking unit that stacks sheets of optical film in which foreign material is removed; a defective mark detection unit that is located on the top or bottom of the cutter in the direction of motion of the optical film to detect defective markers indicating a defective portion of the optical film, the defective portion being pre-labeled; a removal mechanism disposed between the cross cutter and the separate conveyor belt to remove the defective portion cut by the cross cutter; and a control unit that subsequently controls a cross cutter and a removal mechanism that controls the detection results from the detection unit to the defective markers. In the optical film cutting apparatus of the second aspect of the invention, preferably the defective mark in the optical film is preceded 4 with a marking aid or barcode in which the defective portion of the optical film is encoded. In the optical film cutting apparatus of the first and second aspects of the invention, the trimming cutter is preferably located on the upper side of the transverse cutter in the direction of motion of the optical film to trim both sides of the edge portion of the long optical film. In the optical film cutting apparatus according to the first aspect of the invention, the cross cutter is preferably a rotary cutter comprising a blade roller and a smooth roller, the blade roller comprising at least one blade in the longitudinal direction on its outer edge surface, the smooth roller located below the blade roller, the outer edge surface of the smooth the cylinder is in contact with the cutting edge of the blade. In the optical film cutting apparatus according to the first and second aspects of the invention, the separate conveyor belt preferably comprises a plurality of conveyor belts and the conveyor belts are positioned such that the interval between adjacent conveyor belts corresponds to a predetermined interval towards the downstream side of the optical film. In the optical film cutting apparatus of the first and second aspects of the invention, the separate conveyor belt preferably comprises a suction mechanism that transports the optical film such that the optical film is adhered to the surface of the conveyor belt. In the optical film cutting apparatus according to the first and second aspects of the invention, the storage roller is preferably located between the cleaning roller and the stacking unit, the storage roller comprises an upper roller and a lower roller, the speed of rotation of the upper roller and / or the lower roller is faster than the speed of movement of the optical conveyor belt the film and near the lower roll is an air blowing unit such that the air outlet is opposite the back of the optical film deposited by the roll. In the optical film cutting apparatus of the first and second aspects of the invention, the conveyor belt speed range is preferably from 5 to 50 m / min. In an optical film cutting apparatus according to a third aspect of the invention, an optical film is produced by a method of cutting a plurality of sheets of a long optical film optical film, the method for producing an optical film comprising the step of delivering a long optical film from a roll of raw optical film material; cutting the delivered long optical film in the direction of motion of the optical film with a predetermined width; cutting the cut long optical film in a direction perpendicular to the transport direction of the optical film with a predetermined length; separately conveying a plurality of sheets of optical film such that the sheets of optical film do not overlap with each other, the sheets of optical film being cut from the entrained long optical film; removing foreign material adhering to the separately transported sheet of optical film; stacking sheets of an optical film from which foreign material is removed. In an optical film cutting apparatus according to a fourth aspect of the invention, an optical film is produced by a method of cutting a plurality of sheets of a long optical film optical film, the method for manufacturing an optical film comprising the step of delivering a long optical film from a roll of raw optical film material; cutting the delivered long optical film in the direction of motion of the optical film with a predetermined width; cutting the cut long optical film in a direction perpendicular to the transport direction of the optical film with a predetermined length; separately conveying a plurality of sheets of optical film such that the sheets of optical film do not overlap with each other, the sheets of optical film being cut from the entrained long optical film; removing foreign material adhering to the separately transported sheet of optical film; stacking sheets of optical film from which foreign material is removed; detecting defective marks indicative of defective portions of the optical film, 6 first defining the defective portion before or after the cutting step; cutting the optical film containing the defective portion in the cutting step based on the detection results; removing the defective portion including cutting off the defective portion. In an optical film cutting apparatus according to the first aspect of the invention, the optical film may preferably be cut at a rate with excellent productivity and yield. Preferably, the optical film cutting apparatus according to the second aspect of the invention is particularly excellent because the defective portion of the optical film can be removed. Preferably, the method for producing an optical film according to the third aspect of the invention has excellent productivity and yield. Preferably, the method for producing an optical film according to the fourth aspect of the invention has a particularly good yield since it is possible to remove the defective portion of the optical film.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a side view schematically showing an optical film cutting apparatus according to a first embodiment of the invention;

Figure 2 is a plan view schematically showing an optical film cutting apparatus according to a first embodiment of the invention;

Figure 3 is an explanatory view schematically showing a method of cutting an optical film using an optical film cutting apparatus according to a first embodiment of the invention;

Figure 4 is an enlarged explanatory view schematically showing a cross cutter according to a first embodiment of the invention;

Figure 5 is an enlarged explanatory view schematically showing the surroundings of the storage roll according to the first embodiment of the invention;

Figure 6 is a side view schematically showing an optical film cutting apparatus according to a second embodiment of the invention; 7

Figure 7 is a plan view schematically showing an optical film cutting apparatus according to a second embodiment of the invention;

Figure 8 is an explanatory view schematically showing a method of cutting an optical film using an optical film cutting apparatus according to a second embodiment of the invention; and

Figure 9 is an enlarged explanatory view schematically showing the surroundings of a removal mechanism according to a second embodiment of the invention.

DETAILED DESCRIPTION OF THE INVENTION

An optical film cutting apparatus and an optical film manufacturing method according to the first embodiment of the invention will be described in detail with reference to the figures. Figure 1 is a side view schematically showing an optical film cutting apparatus according to a first embodiment of the invention. Figure 2 is a plan view schematically showing an optical film cutting apparatus according to a first embodiment of the invention. Figure 3 is an explanatory view schematically showing a method of cutting an optical film using an optical film cutting apparatus according to a first embodiment of the invention. Figure 4 is an enlarged explanatory view schematically showing a cross cutter according to a first embodiment of the invention. Figure 5 is an enlarged explanatory view schematically showing the surroundings of the storage roll according to the first embodiment of the invention.

As shown in Figures 1 and 2, the optical film cutting apparatus according to the first embodiment comprises a roll of raw material of the optical film sequentially with a slitter 10; cross cutter 20; a separate conveyor belt 30, a pair of cleaning rollers 40 and 40, a stacking unit 50 from the upper side in the direction of arrow (arrow direction A) of the long optical film 6 supplied from the roll with raw material 1. As shown in Figure 3, the long optical film 2 8 supplied from the raw material roll 1 is cut in the direction of motion of the optical film and a plurality of optical films 4 can be cut from the slit long optical film 3.

More specifically, as shown in Figure 2, on the roll of raw material of the optical film 1, the long optical film 2 is wound around a delivery rod 11 which is made of a magnetic material. Preferably, the delivery bar 1a has a conical shape. The two end portions of the supply rod are housed in a pair of bearings 1b and 1b. As shown in Figure 1, the optical film 2 is supplied at a constant rate in the direction of the arrow A from the roll with the raw material 1 by a pair of feed rollers 16 and 16.

The slitter 10 is used to cut the long optical film 2 supplied from the roll with raw material 1 in the direction of motion of the optical film (in the direction of arrow A) with a predetermined width. The slicer 10 comprises a plurality of rotating blades b1 and a cylinder 12. The cylinder 12 is disposed below the rotating blades b1 and contacts the cutting edges of the rotating blades b1 on the outer side surface of the cylinder L2 (see FIGS. 1-3).

The plurality of rotating blades bL are disposed in parallel at intervals that correspond to the width of the cut sheet of optical film 6 and the rotating blades 11 are positioned in a direction perpendicular to the direction of movement (i.e., the direction has an angle of 90 degrees with respect to the direction of motion). The interval between the rotating blades b1 can be arbitrarily selected according to the width of the sheet of the optical film 4, usually it is preferably set in the range of about 100 mm to about 1200 mm.

The number of rotating blades 11 can be determined by the number of sheets of the optical film 4. The number of rotating blades bL is not limited to at least two, but one rotating blade 11 may also be used. Preferably, the number of optical film blades ranges from two to six and the number of rotating blades 11 ranges from one to five. Preferably, the so-called NC (numerically controlled) cutter is used as a cutter 10 with a view to improving productivity, in which each rotating blade 1Λ is automatically positioned when cutting dimensions are inserted through the handling panel.

The cutting of the optical film 2 by the slitter 1CI is carried out as follows. The optical film 2 delivered at a constant speed in the direction of the arrow A by a pair of transport rollers 16 and 16 is conveyed between the rotating blades 11 and the roller 12 of the cutter 10. The cutting edges of the rotating blades 11 press the supplied optical film 2 against the outer side surface of the roll 12, and the rotating blades 11 rotate as the optical film 2 moves. . Preferably, the trimming cutters 13 and 11 are located on the upper side of the transverse cutter 20 in the direction of motion to trim the lateral edges of the long optical film portions 5 and 5. Although the optical film 4 has different widths (ie, indeterminate), the cutter 13 and 13 are can be easily adapted to different widths. A cutter having the same assembly as the rotating blade 11 can be mentioned as an example of a trimming cutter 13 and 13. The lateral edge portions 5, 5 of the cropped optical film 2 are removed towards the container 5 by a pair of rollers 14 and 14 respectively.

The cross cutter 20 is used to cut a cut long optical film 3 with a predetermined length in a direction perpendicular to the direction of movement. As shown in Figure 4, the cross cutter 2 () is a rotary cutter comprising a blade roller 22 and a smooth roller 23. The blade roller 2/2 comprises four blades 21, ... and 21 at the same interval in the longitudinal direction. The smooth roller 23 is located below the blade roller 22, and the outer side surface of the smooth roller 23 is in contact with the cutting edges of the blade 21. Therefore, preferably the speed of movement is improved and the blades 21 can be easily replaced. 10

The optical film 3 can be cut to the desired length by adapting the rotating speed of the blade roller 22 in the transverse cutter 21. The cut length of the optical film 3 can also be adapted to the diameter of the blade roller 22 and the smooth roll 23 and the number of blades 21 included in the blade roller 22. The rotational speed of the blade roller Z2 and the diameter of the blade roller 22 and the smooth roller 23 are not particularly limited, but the rotational speed and diameters can be arbitrarily selected according to the length of the optical film section 3y, i. the length of the optical film sheet 8. Preferably, the rotational speed of the blade roller 22 is in the range of about 15 to about 600 rpm, the diameter of the blade roller 22 is in the range of about 50 mm to about 200 mm, and the diameter of the smooth roller 23 is in the range of about 100 mm to about 300 mm. The number of blades 2Λ contained in the blade roller 22 not limited to four, but the number of blades 21 can optionally be selected from the range of 1 to 10, usually ranging from one to four. For example, a rotary cutter is disclosed in Japanese patent application no. 06-304895 and 08-112798.

Cutting the optical film 3 with the transverse cutter 20 takes place as follows. The slit long optical film 3 is conveyed between the blade roller 22 and the smooth roller 23 of the cross cutter 20. Thereafter, the cutting edge of the blade 21 contained in the blade roller 22 ^ cuts the optical film 3 while the optical film 3 is pressed against the outer side surface of the smooth roller 23. . As a result, the slit long optical film 3 is cut in a direction perpendicular to the direction of movement (i.e., the direction is 90 degrees with respect to the direction of movement) with a predetermined length. If the blade roller 22 'rotates in two phases, the other optical film 3' is cut in a predetermined direction.

The separate conveyor belt 30 is used to separately transport a plurality of sheets of optical film 4 cut off from the optical film 3 such that a plurality of sheets of the optical film 40 do not overlap one another. As shown in Figures 2 and 3, the separate conveyor belt 30 of the first embodiment comprises a plurality of conveyor belts 31 and the conveyor belts 31 are positioned such that the intervals between adjacent conveyor belts 34 extend to a predetermined interval toward the upper side in the direction of movement. Therefore, even if the cut optical film 6 overlaps another, the optical films 6 are separately conveyed such that the interval between adjacent optical films 6 extends to a predetermined interval towards the upper side of the conveyor belt 30 in the direction of motion, such that the optical the films 6 do not overlap one another.

More specifically, the interval between adjacent conveyor belts 31 extends to a predetermined interval towards the upper side in the direction of motion such that the interval between adjacent optical films 6 extends to about 1.5 mm to about 2.5 mm towards the upper Although the number of conveyor belts 3 is not particularly limited, it is preferable to place 5 to 15 conveyor belts 31, since the plurality of sheets of optical films are simply conveyed so that they do not overlap one another.

On the other hand, a plurality of sheets of optical films are conveyed but overlapped with each other, although there is a predetermined position between the conveyor belts 31. When the optical films 4 are conveyed and overlapped with each other, a rail is formed in the portion where the optical films are overlapped with each other when removing the foreign materials of the optical film 6 by a cleaning roller 20 which creates gaps in the optical film. Preferably, the separated conveyor belt 30 includes a suction mechanism that transports the optical film 6 by sucking the optical film 6 onto the surface of the conveyor belt. Thus, the optical film 6 placed on the surface of the separate conveyor belt 30 is fixed such that the optical film 6 can be safely conveyed at high speed when the optical film is twisted. 12

As shown in Figures 2 and 3, in the suction mechanism of the first embodiment, a plurality of suction ports 32 are provided throughout the conveyor belt 31 and a suction box (not shown) including a plurality of air supply ports is located below the separate conveyor belt 6. 0th Thus, when the pressure in the suction box is reduced because the air on the surface of each conveyor belt is sucked into the suction box through the suction openings produced in each conveyor belt 31, a suction force is formed on the surface of each conveyor belt, allowing the optical film Is safely transported at high speed even when the optical film is twisting. The cleaning roller pair 40 and 40 is used to remove foreign material adhering to each separately conveyed optical film 4. As shown in Figures 1 and 3, the cleaning roller 40 of the first embodiment includes a soft adhesive roller 61 and a fixed adhesive roller 42. The rigid adhesive of the roller 42 is positioned so as to be in contact with the soft adhesive roller 40 and the solid adhesive roller 42 has an adhesive force greater than the adhesive strength of the soft adhesive roller 51. More specifically, the adhesive layer made of acrylic resin is disposed on the peripheral surface of each soft adhesive roller 40 and the fixed adhesive roller 42. In the soft adhesive roll, a vast adhesive force is obtained to remove adhered foreign material from the optical film by adjusting the thickness of the adhesive layer and the acrylic resin composition. A large adhesive force is obtained in the rigid adhesive cylinder 42 so that adhering foreign material from the optical film 6 on the soft adhesive roller 11 can be peeled off and removed from the soft adhesive roller 44 by adjusting the thickness of the adhesive layer and the acrylic resin composition.

Removal of foreign material adhering to each optical film 6 with a pair of cleaning rollers 20 and 20 is performed as follows. When the optical films 6 which are separately conveyed so that they do not overlap each other, they are conveyed between the soft adhesives 13 of the rollers 41 and 41 in a pair of cleaning rollers 20 and 20, the foreign material adhering to the optical film 6 adheres to the soft adhesive rollers 6 1 and 1, and the foreign material is removed from the optical film 4. Thereafter, the soft adhesive rollers 61 and 51 rotate by the movement of the optical film 4, and the solid adhesive rollers 42 and 42 also rotate according to the rotation of the soft adhesive rollers 44 and 51. . Thus, the foreign material adhered to the soft adhesive rollers 41 and 51 adheres to the fixed adhesive rollers 42 and 42, and the foreign material is removed from the soft adhesive rollers 41 and 41, whereby the surface of the soft adhesive rollers 44 and 51 is retained always clean.

The conveyor belt 55 transports the optical films 6 from which the foreign material has been removed to the stacking unit 50. If it is evident from Figures 2 and 3, the conveyor belt 5 according to the first embodiment comprises a plurality of conveyor belts 64 to allow the optical films 4, from which foreign material has been removed, arranged to be easily transported. The amount of conveyor belts 6 is not limited, preferably two to eight conveyor belts 46 are used to effect the above-described effect.

For the same reason as the separate conveyor belt 30, the conveying belt 5 includes a suction mechanism. That is, a plurality of intake openings 47 are formed in the entire region of each conveyor belt 6 and a suction box (not shown) including a plurality of air intake ports is located below the separate conveyor belt 45.

The so-called compression roller (not shown) may be positioned above the conveyor belt 55. The compression roller pushes the optical film 6 from above with its weight or fine polarizing force to prevent the conveyed optical film from twisting. The conveyor belt 55 is not limited to the above described configuration, but the conveyor belt 55 may have any configuration that allows the optical film to be conveyed to the stacking unit 50. Preferably, the plurality of stacking rollers 60 and a plurality of air blowing units 54 are disposed between a cleaning roller 40 and a stacking unit 54 (ie, between the conveyor belt 14 45 and the stacking unit 50). Thus, the optical films 4 can be stacked in the stacking unit 50 without scratching the optical film 4 and without creating an optical film error connection 4.

As can be seen from Figure 5, the storage roller 60 according to the first embodiment comprises an upper cylinder 61, and a lower cylinder 62 and rotational speeds of the upper cylinder 61 and / or lower cylinder 62 are set faster than the optical speed of the optical film 4. Thus, the optical film 4 conveyed by the conveyor belt 45 is deposited towards the stacking unit 50 by the storage roller 60.

The air blowing unit 65 is positioned proximate the lower cylinder 62 so that the air outlet 66 is opposite the back of the optical film 4 deposited by the storage roller 60. Thus, the air blowing unit 65 blows air toward the back of the optical film 4 deposited by the storage cylinder As a result, the deposited optical film 4 is supported in the direction in which the optical film 4 is deposited by the storage roll 60 and the optical films 4 are stacked in the stacking unit 50 such that the optical films can be stacked without scratching. of the optical film 4 and without creating an error transport connection of the optical film 4. Preferably, one to eight storage rollers 60 and one to eight air blowing units 65 are used.

The stacking unit 50 is used to stack optical films 11 from which foreign material has been removed. 1 to 3, a stacking unit 50 according to a first embodiment of the invention engages the optical films 4 which are aligned and conveyed by the conveyor belt 45 and the stacking unit 40 stores the optical films 4 in the cassette 51. The stacking unit 5j includes a lifting mechanism 52 which lifts the cassette 51 according to the thickness of the stacked optical films 4. Preferably, the cassette 51 is designed such that its stroke is freely adjusted to effectively deposit optical films.

The stacking of the optical films by the stacking unit 50 is carried out as follows. When a predetermined number of optical films 6 is collected in the cassette 51, the lifting mechanism 52 lowers the cassette 51 from the stacking position to the cartridge withdrawal position, and the cassette 51 is plotted in the direction of the arrow C (see Figure 2). After the cassette 51 has been ejected, the lifting mechanism 52 is raised again to the stacking position. Then, in the direction of the arrow D, the new cassette 51 is moved to fit the cassette 51 onto the lifting mechanism 52 and the newly conveyed optical films 4 are moved. In the optical film cutting apparatus of the first embodiment with the above-described configuration, the speed of movement of the optical film can be adjusted in the range of 5 to 50 m / min.

An optical film cutting apparatus and an optical film manufacturing method according to a second embodiment of the invention will be described in detail with reference to the figures. Figure 6 is a side view schematically showing an optical film cutting apparatus according to a second embodiment of the invention. Figure 7 is a plan view schematically showing an optical film cutting apparatus according to a second embodiment of the invention. Figure 8 is an explanatory view schematically showing a method of cutting an optical film using an optical film cutting apparatus according to a second embodiment of the invention. Figure 9 is an enlarged explanatory view schematically showing the surroundings of a removal mechanism according to a second embodiment of the invention. In Figures 6 to 9, the components of the first embodiment are designated by the same numbers as in Figures 1 to 5 and the description is not given.

The optical film cutting apparatus according to the second embodiment is arranged to be able to remove the defective portion of the optical film. More specifically, as shown in Figures 6 to 9, the optical film cutting apparatus of the second embodiment includes a defective mark detection unit 70 and a removal mechanism 80 and a control unit 1690 in addition to the optical film cutting apparatus configuration of the first embodiment.

The defective mark detection unit 70 is located on the top or bottom of the cutter 10 in the direction of motion. As shown in Figure 8, the defective mark detection unit 10 detects a defective mark (e.g., barcode 72) indicating a defective portion of the TI optical film 2. Defective portion 7J. is first marked in the long optical film 2.

As used herein, a pre-labeled defective mark in optical film 2 is intended to mean a defective mark by which the defective portion 7 of the optical film 2 is marked with a marking means such that a mark using a sheet-like product encodes a marking means or barcode 72, the sheet in which it is a defective portion 11 of the optical film 2. For example, Japanese Patent Application 2002-148198 discloses a means for labeling a product of a similar sheet. For example, Japanese Patent Application Nos. 05-341487 and 2003-202298 disclose a device for marking a coding bar code in a defective portion of an optical film.

The long optical film 2 in which the defective mark indicating the defective portion of the TI optical film 2 is first marked is wound around a feed bar 1a, which is a magnetic roll forming material with the raw material of the optical film 1 according to the second embodiment.

As shown in Figure 8, the defective mark of the second embodiment is a bar code in which a defective portion 2i of the optical film 2 is encoded. As shown in Figures 7 and 8, the defective marker detection unit 10 includes a barcode position sensor. A barcode reader 73 and a barcode reader control unit 75. The barcode position detection sensor 2i detects the barcode position 12. The barcode reader 21 reads the bar code 21 · The barcode reader control unit 75 transmits the sensor detection results to 17 to detect the barcode position 73 and the barcode reader 7 to the control unit 90.

The interval between the barcode detection sensor 73 and the barcode reader 74 is set to 300mm or more, preferably ranging between 300mm to 500mm. Thus, the barcode position captured on the top side can be easily detected. The interval between the bar code reader 74 and the cross cutter 20 is set to 750 mm or more, preferably between 750 mm and 1200 mm -1. Thus, the defect detected in the barcode position can be removed with the cross cutter.

The removal mechanism 81 is disposed between the transverse cutter 20 and the separate conveyor belt 34 for removing the optical film 6 which includes the defective portion 71 by cutting it with a transverse cutter 28. As can be seen from Figure 9, the removal mechanism 80 according to the second embodiment includes the rollers 81 and 122 and the conveyor belt 83 tensioned between the rollers 81 and 82. The removal mechanism 80 may be driven upwardly relative to the direction of movement (ie, in the direction of the arrow E) because it is centered around the center of the bar 82a of the roller 82 based on the control unit 90.

The control unit 90 is used for subsequent drive of the cross cutter 20 and the removal mechanism 80 based on the detection results of the defective mark detection unit 70. In a second embodiment, preferably, the length of the cut of the optical film 6 comprising the defective portion 11 is as short as possible. to minimize the loss of product. Thus, in the transverse cutter 20, the rotational speed of the blade roller 22 is preferably in the range of about 5 to 1000 rpm, and the diameter of the blade roller 22 is in the range of about 100 mm to about 500 mm.

The method of removing the defective portion of the optical film by the optical film cutting apparatus of the second embodiment will be described below 18. The bar code position detection sensor 73 detects the bar code position 72 indicating a defective portion 21 of the optical film 2 that is conveyed at a constant speed in the direction of the arrow A by a pair of sliding rollers 16 and 16 and a barcode reader 2i Reads barcode 22 · Sensor Detection Results at detecting the position of the barcode T3 and the barcode reader 2i from the barcode reader control device 5 to the control unit 21 after they have been collected in the barcode reader control device 75.

Thereafter, the inspection unit 90 subsequently controls the cross cutter 21 and the removal mechanism 21 based on the detection results from the defective marker 21 detecting unit / cross cutter 20 cuts the optical film with the defective portion 21 to a predetermined length under the control of the control unit 90. [0035] Then, the removal mechanism 80 is driven upwardly relative to the direction of travel because it is centered around the center of the bar 82a of the cylinder 21 under the control of the inspection unit 21 and the removal mechanism 21 removes the optical film 6 with the defective portion 21 cut off by the cross cutter 22 toward the container 85.

Since other configurations are similar to the first embodiment, their description is not disclosed.

Since embodiments of the invention are described above, the invention is not limited to the embodiments, but ordinary variations and modifications may be made without departing from the scope of the invention. For example, the slitter comprises rotating blades in an embodiment. Because the optical film cutting apparatus of the present invention includes a cleaning roller, a scissor cutter (guillotine cutter) can be used instead of rotating blades.

Claims (11)

  1. CLAIMS 1. An optical film cutting apparatus that cuts a plurality of sheets of optical film from a long optical film, the optical film cutting apparatus comprising: a roll with a raw optical film material; a slitter that cuts a long optical film fed from a roll of raw optical film material in the optical film transport direction with a predetermined width; a transverse cutter which cuts the entrained long optical film in a direction perpendicular to the transport direction of the optical film with a predetermined length; a separate conveyor belt which separately transports a plurality of sheets of optical film such that the sheets of optical film do not overlap with each other, the sheets of optical film being cut from the entrained long optical film by means of a cross cutter; a pair of cleaning rollers that remove foreign material adhered to the separately transported sheet of optical film; and a stacking unit that stacks the sheets of optical film in which the foreign material is removed.
  2. An optical film cutting apparatus which cuts a plurality of sheets of optical film from a long optical film, the optical film cutting apparatus comprising: a roll with a raw optical film material; a slitter that cuts a long optical film fed from a roll of raw optical film material in the optical film transport direction with a predetermined width; 20 shows a transverse cutter that cuts the entrained long optical film in a direction perpendicular to the transport direction of the optical film with a predetermined length; a separate conveyor belt which separately transports a plurality of sheets of optical film such that the sheets of optical film do not overlap with each other, the sheets of optical film being cut from the entrained long optical film by means of a cross cutter; a pair of cleaning rollers that remove foreign material adhered to the separately transported sheet of optical film; and a stacking unit that stacks sheets of optical film in which foreign material is removed; a defective mark detection unit that is located on the top or bottom of the cutter in the direction of motion of the optical film to detect defective markers indicating the defective portion of the optical film, the defective portion being pre-labeled; a removal mechanism positioned between the cross cutter and the separate conveyor belt to remove the defective portion cut by the cross cutter; and a control unit which subsequently controls a cross cutter and a removal mechanism based on detecting results from the detection unit on the defective markers.
  3. An optical film cutting apparatus according to claim 2, wherein the preselected defective mark in the optical film is a defective mark of the marking aid or barcode in which the defective portion of the optical film is encoded.
  4. An optical film cutting apparatus according to any one of claims 1 to 3, wherein the trimming cutter is located on the top 21 of the transverse cutter in the direction of motion of the optical film to trim both sides of the edge portions of the long optical film.
  5. An optical film cutting apparatus according to any one of claims 1 to 4, wherein the cross cutter is a rotary cutter comprising a blade roller and a smooth roll, the blade roll comprising at least one blade in the longitudinal direction on its outer edge surface, the smooth roll being positioned below the blade the outer edge surface of the smooth cylinder is in contact with the cutting edge of the blade.
  6. An optical film cutting apparatus according to any one of claims 1 to 5, wherein the separate conveyor belt comprises a plurality of conveyor belts and the conveyor belts are positioned such that the interval between adjacent conveyor belts corresponds to a predetermined interval towards the downstream side in the direction of optical movement. film.
  7. An optical film cutting apparatus according to any one of claims 1 to 6, wherein the separate conveyor belt comprises a suction mechanism that transports the optical film such that the optical film is sucked onto the surface of the conveyor belt.
  8. An optical film cutting apparatus according to any one of claims 1 to 7, wherein the storage roller is located between the cleaning roller and the stacking unit, the storage roller includes an upper roller and a lower roller, the speed of rotation of the upper roller and / or the lower roller is faster than the speed the movement of the optical film conveyor belt and the air blowing unit 22 is located proximate the lower cylinder such that the air outlet is opposite the back of the optical film deposited by the storage roller.
  9. An optical film cutting apparatus according to any one of claims 1 to 8, wherein the speed of the optical sheet conveyor belt is in the range of 5 to 50 m / min.
  10. A method of cutting a plurality of sheets of optical film from a long optical film to produce an optical film, the method for producing an optical film comprising the step of: supplying a long optical film from a roll of raw optical film material; cutting the delivered long optical film in the direction of motion of the optical film with a predetermined width; cutting the cut long optical film in a direction perpendicular to the transport direction of the optical film with a predetermined length; separately conveying a plurality of sheets of optical film such that the sheets of the optical film do not overlap one another, the sheets of the optical film being cut from the entrained long optical film; removing foreign material adhering to the separately transported sheet of optical film; stacking sheets of an optical film from which foreign material is removed.
  11. A method of cutting a plurality of sheets of an optical film from a long optical film to produce an optical film, the method for producing an optical film comprising the step of: supplying a long optical film from a roll of raw optical film material; 23 is a view of cutting the delivered long optical film in the direction of motion of the optical film with a predetermined width; cutting the cut long optical film in a direction perpendicular to the transport direction of the optical film with a predetermined length; separately conveying a plurality of sheets of optical film such that the sheets of the optical film do not overlap one another, the sheets of the optical film being cut from the entrained long optical film; removing foreign material adhering to the separately transported sheet of optical film; stacking sheets of optical film from which foreign material is removed; detecting defective marks indicating defective portions of the optical film, the defective portion first marking before or after the cutting step; cutting the optical film comprising the defective portion in the cutting step based on the detection results; removing the defective portion including cutting off the defective portion.
SK5013-2008A 2007-02-19 2008-02-05 Device for cutting optical film and method for production of optical film SK50132008A3 (en)

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JP2007037542A JP2008200788A (en) 2007-02-19 2007-02-19 Optical film cutting device and optical film manufacturing method

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KR (1) KR20080077333A (en)
CN (1) CN101249658A (en)
SK (1) SK50132008A3 (en)
TW (1) TW200846155A (en)

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TW200846155A (en) 2008-12-01
CN101249658A (en) 2008-08-27
KR20080077333A (en) 2008-08-22

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