KR20130111665A - Apparatus and method for forming flatness of glass substrate - Google Patents

Abstract

PURPOSE: A device for forming glass substrates and a method thereof are provided to obtain high quality flat surface from large area glass substrate by combining flat film formed on the flat surface with a glass substrate. CONSTITUTION: A device for forming glass substrates (100) comprises a glass substrate transport unit (200), a flat film supply part (300), and a sealing part (400). The glass substrate transport unit transfers the glass substrate. The flat film supply part supplies flat films in which flat surface is formed on one side. The sealing part adheres the flat film to the glass substrate and forms the flat surface on the glass substrate. The flat film supply part comprises a release film conveying unit (310) and a plane film laminating unit (320). The release film conveying unit transfers the release film towards the glass substrate. The flat film laminating unit laminates the flat film on the release film.

Description

Apparatus and method for forming flatness of glass substrate}

The present invention relates to an apparatus and method for forming a flat surface of a glass substrate, and more particularly to an apparatus and method for forming a flat surface of a glass substrate to form a flat surface on the glass substrate.

Glass substrates are used for PDP (Plasma Display Panel), LCD (Liquid Crystal Display), and AMOLED (Active Matrix Organic Light Emitting Diodes), which have recently become popular as display devices.

Among them, a glass substrate used in a TFT LCD (Thin Film Transistor Liquid Crystal Display) is a substrate attached to a TFT array and a color filter, and is used as a core material of a TFT LCD panel. Therefore, the glass substrate is required to have a flat surface that can not be distinguished from the naked eye, and high quality characteristics such as no deformation due to heat.

However, in the process of producing a glass substrate, melting defects are generated on the surface of the glass substrate, and melting defects cause a problem that it is difficult to use the glass substrate in a display device. Therefore, in the related art, the surface of the glass substrate is polished to remove melt defects, thereby ensuring a certain level of flatness on the glass substrate. Such a device for polishing the surface of a glass substrate has already been disclosed in Korean Patent Registration No. 10-0952324 and the like.

On the other hand, before polishing the surface of the glass substrate, the surface inspection of the glass substrate should be preceded in order to check for melting defects. As a result of the surface inspection of the glass substrate, the molten defect portion to be detected is polished to ensure the desired flatness of the organic substrate.

However, the surface inspection of the glass substrate is required to be carried out in the unit of several μm, so not only the precision of the inspection is required, but also the glass substrate is damaged or the glass substrate is damaged when local pressure is applied to the molten defect part during the polishing process. There is a problem that the durability of the.

This problem is further deepened as the glass substrate becomes larger in area, and thus leads to a problem in that productivity is lowered.

Korean Patent No. 10-0952324 (published on Aug. 21, 2009)

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus and method for forming a flat surface of a glass substrate, which ensures durability of the glass substrate and obtains a high quality flat surface even in a large area glass substrate.

The flat surface forming apparatus of the glass substrate according to the present invention is a glass substrate transfer unit for transporting a glass substrate, a flat film supply unit for supplying a flat film having a flat surface formed on one surface and the glass substrate by bonding the flat film to the glass substrate It includes a bonding portion to form the flat surface.

The flat film supply unit may include a release film transfer unit for transferring a release film toward the glass substrate, and a flat film stacking unit for stacking the flat film on the release film.

The flat film supply unit is disposed before the flat film stacking unit to clean the release film, and is formed between the flat film stacking unit and the bonding portion to form a release layer on the release film, the The apparatus may further include a release layer curing unit for curing the release layer and a release unit disposed after the bonding part to release the release film from the flat film.

The release film conveying unit is a supply roller for supporting the conveying film provided in a roll shape, a discharge roller to which the release film peeled from the flat film is wound, and disposed between the supply roller and the discharge roller. It may include a plurality of feed rollers to form a feed path of the.

The release film transfer unit may include a plurality of transfer rollers for circulating the release film in the form of a closed curve.

The flat film stacking unit includes a support roller for rolling the release film, a raw material container in which the liquid raw material of the flat film is accommodated, a rolling roller in which the liquid raw material accommodated in the raw material container is applied to the transport film, The extrusion film is coated with the liquid raw material so that the flat film is formed by the extrusion roller, and the flat film is received from the extruder roller. The flat film is laminated on the release film by rolling with the support roller. It may include a lamination roller.

The bonding part may include a pressure roller for pressing the release film toward the glass substrate.

The bonding part may further include a first curing unit that irradiates heat or light toward the release film bonded to the glass substrate.

The glass substrate transfer unit may include a transfer rail that supports the transfer rail and the glass substrate and is linearly transferred along the transfer rail.

The flat surface forming apparatus of the glass substrate may further include a glass substrate heating unit which is disposed before the bonding portion and heats the glass substrate so that the flat film is fused to the glass substrate.

The bonding part may include a pressure roller for contacting the flat film to the glass substrate and pressurizing the flat film, and a first curing unit to cure the flat film bonded to the glass substrate.

The flat surface forming apparatus of the glass substrate may further include a second curing unit disposed after the bonding part to further cure the flat film discharged from the bonding part.

On the other hand, the method for forming a flat surface of the glass substrate according to the present invention is a glass substrate transfer step of transporting the glass substrate, a flat film supply step of supplying a flat film having a flat surface formed on one surface and the flat film is bonded to the glass substrate And a bonding step in which the flat surface is formed on the glass substrate.

The flat film supplying step may include a release film transfer step of transferring a release film toward the glass substrate, and a flat film stacking step of laminating the flat film on the release film.

In the flat film supplying step, the release film is cleaned before the flat film stacking step, and the release layer is formed between the release film forming step and the flat film laminating step and the bonding step. It may further comprise a release layer curing step to be cured.

The flat surface forming method of the glass substrate may further include a peeling step of peeling the release film from the flat film after the bonding step.

The bonding step may include a pressing step in which the flat film is in contact with the glass substrate and the flat film is pressed, and a first curing step in which the flat film is cured.

The method for forming a flat surface of a glass substrate may further include a glass substrate heating step of heating the glass substrate so that the flat film is fused to the glass substrate before the bonding step.

The method of forming a flat surface of the glass substrate may further include a second curing step of further curing the flat film after the bonding step.

The flat surface forming apparatus and method of the glass substrate according to the present invention has the effect of producing a high quality glass substrate.

In addition, the flat surface forming apparatus and method of the organic substrate according to the present invention has the effect that the productivity is improved.

1 is a view briefly showing the configuration of a flat surface forming apparatus of a glass substrate according to the present embodiment.
2 is an enlarged view illustrating a state in which the flat film and the glass substrate are bonded by the flat surface forming apparatus of the glass substrate according to the present embodiment.
3 is a view schematically showing the configuration of a flat surface forming apparatus of a glass substrate according to another embodiment.
4 is a flowchart illustrating a method of forming a flat surface of a glass substrate according to the present embodiment.

Hereinafter, an embodiment of a flat surface forming apparatus and method of a glass substrate according to the present invention will be described with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, Is provided to fully inform the user.

1 is a view schematically showing the configuration of the flat surface forming apparatus of the glass substrate according to the present embodiment, Figure 2 is a state in which the flat film and the glass substrate is bonded by the flat surface forming apparatus of the glass substrate according to the present embodiment Figure is an enlarged view.

1 and 2, a flat surface forming apparatus (hereinafter, referred to as a 'flat surface forming apparatus of a glass substrate') 100 according to the present embodiment is a glass substrate conveying unit 200 and a flat film. It includes a supply unit 300 and the bonding unit 400.

The glass substrate transfer unit 200 includes a transfer rail 210 and a transfer cart 220. The transport cart 220 supports the glass substrate 10 and is linearly transported along the transport rail 210. Glass substrate transfer unit 200 is a linear actuator (Linear actuator) consisting of a combination of the conveying rail 210, the conveying bogie 220, rack and pinion (not shown) and a rotating motor (not shown), Or a linear actuator made of a combination of a conveying rail 210, a conveying bogie 220, a ball screw (not shown), and a rotating motor (not shown), or a conveying rail 210, a conveying bogie 220, and a hydraulic / pneumatic cylinder. It may be made in the form of a linear actuator made of a combination of (not shown).

The glass substrate heating unit 110 may be installed in the transfer path of the glass substrate 10 transferred by the glass substrate transfer unit 200. The glass substrate heating unit 110 heats the glass substrate 10 so that the glass substrate 10 can reach the process temperature. The process temperature is a temperature at which the flat film 30 to be described later can be smoothly fused to the glass substrate 10. The glass substrate heating unit 110 may be formed in the form of a heating coil or a hot air fan disposed above the glass substrate transfer unit 200.

The bonding part 400 is disposed in the path of the glass substrate 10 that has passed through the glass substrate heating unit 110. The bonding part 400 includes a pressure roller 410 and a first hardening unit 430.

The pressure roller 410 may be disposed on the upper side of the transport cart 220 so that the pressure roller 410 may be lifted and lifted relative to the transport cart 220. The pressure roller 410 allows the flat film 30 to contact the glass substrate 10 and presses the flat film 30 so that the flat film 30 is bonded to the glass substrate 10.

The first curing unit 430 is disposed in front of the pressure roller 410 to cure the flat film 30 bonded to the glass substrate 10. Here, the flat film 30 may be made of a photocurable resin or a thermosetting resin. Therefore, as the first curing unit 430, a photocuring apparatus or a thermosetting apparatus may be used. When the first curing unit 430 is used as a photocuring apparatus, the photocuring apparatus may use a light source that emits ultraviolet (UV) light. When the first curing unit 430 is used as a thermal curing apparatus, the thermal curing apparatus may be in the form of a heating coil or a hot air blower.

As such, the second curing unit 120 may be installed in the transport path of the glass substrate 10 to which the flat film 30 is bonded by the bonding part 400. As the second curing unit 120, an optical curing apparatus such as the first curing unit 430 described above, or a thermal curing apparatus may be used.

Meanwhile, the flat film supply unit 300 is disposed above the glass substrate transfer unit 200.

The flat film supply unit 300 includes a release film transfer unit 310, a peeling layer forming unit 320, a flat film stacking unit 330, a peeling layer curing unit 340, and a peeling unit 350.

The release film conveying unit 310 may be made of a combination of the supply roller 311, the discharge roller 312 and the plurality of conveying roller 313. The supply roller 311 supports the transfer film 31 provided in the form of a roll. The discharge roller 312 is disposed after the bonding part 400 so that the release film 20 from which the flat film 30 is peeled off is wound. The plurality of feed rollers 313 are disposed between the supply roller 311 and the discharge roller 312 to form a feed path of the release film 20. A rotating motor (not shown) for rotating the discharge roller 312 may be connected to the shaft supporting the discharge roller 312 so that the release film 20 can be released from the supply roller 311. At this time, a plurality of rotary motors (not shown) may be provided to rotate the feed rollers 311 and the plurality of feed rollers 313 at a speed synchronized with the rotation speed of the discharge roller 312, or a plurality of feed rollers. 313 and the supply roller 311 may be connected to each other by a power transmission member such as a belt to the discharge roller (312).

In the above description, the release film 20 has been described in the form of a roll is transferred from the supply roller 311 to the discharge roller 312. As shown in Figure 3, the release film 20 is provided in the form of a closed curve, it may be modified to be circulated by a plurality of feed rollers (313). At this time, the configuration of the supply roller 311 and the discharge roller 312 can be omitted.

On the other hand, the release layer forming unit 320 is disposed in the transfer path of the release film 20 released from the supply roller 311. The release layer forming unit 320 sprays a cleaning gas or a cleaning agent to remove foreign substances from the release film 20. The release layer forming unit 320 forms the release layer 21 on the release film 20. The peeling layer 21 is provided with the liquid raw material which consists of photocurable resin or thermosetting resin, and is apply | coated to a release film. The release layer 21 allows the flat film 30 to be smoothly laminated to the release film 20, and the flat film 30 is formed from the release film 20 after the flat film 30 is bonded to the glass substrate 10. ) Peel off smoothly.

The flat film stacking unit 330 is disposed in the transfer path of the release film 20 in which the release layer 21 is formed. The flat film stacking unit 330 allows the flat film 30 to be stacked on the release layer 21. The flat film stacking unit 330 includes a raw material container 331, an application roller 332, an extrusion roller 333, a lamination roller 334, and a support roller 335.

The raw material container 331 accommodates a liquid raw material having a viscosity that can be adhered to the transfer film 31. The transfer film 31 is supplied to the application roller 332, and the application roller 332 is rolled to contact the transfer film 31 with the liquid raw material contained in the raw material container 331. Allow to be applied. The extrusion roller 333 extrudes the liquid raw material applied to the transfer film 31 to form a flat film 30. At this time, the flat film 30 is extruded by the extrusion roller 333 has a thickness of 0.1 ~ 70㎛, a flat surface is formed on one surface. The flat surface may have a waviness of 0.01 to 0.2 μm or less. The stacking roller 334 and the support roller 335 are opposed to each other. The support roller 335 supports the release film 20 in a rolling manner, and the lamination roller 334 receives the flat film 30 from the extrusion roller 333 and is engaged with the support roller 335 to rotate. As such, the flat film 30 may be laminated on the release layer 21.

The release layer curing unit 340 is disposed in the transfer path of the release film 20 in which the flat film 30 is stacked. The release layer curing unit 340 cures the release layer 21 to smoothly release the release film 20 from the flat film 30. As the release layer curing unit 340, the above-described photocuring apparatus or thermal curing apparatus can be used. In this case, the release layer curing unit 340 may cure the release layer 21 at a temperature lower than that of the first curing unit 430 described above so that the flat film 30 is not cured.

The peeling unit 350 is disposed after the cemented portion. The peeling unit 350 peels off the release film 20 from the flat film 30 after the flat film 30 is bonded to the glass substrate 10. The peeling unit 350 may include a first peeling roller 351 and a second peeling roller 352.

The first peeling roller 351 is a glass substrate 10 in order to prevent the flat film 30 from being separated or damaged from the glass substrate 10 in response to the sudden angle change between the release film 20 and the flat film 30. ) To the flat film 30 and the release film 20 is maintained at a predetermined angle, for example, 10 degrees or less. The second peeling roller 352 receives the release film 20 from the first peeling roller 351 so that the release film 20 is completely peeled from the flat film 30.

Hereinafter, a method of forming a flat surface of the glass substrate according to the present embodiment will be described in detail.

4 is a flowchart illustrating a method of forming a flat surface of a glass substrate according to the present embodiment.

Referring to FIG. 4, the glass substrate 10 is seated on the transport cart 220. The transport cart 220 is linearly transported along the transport rail 210. (Step S11)

In this case, the glass substrate 10 passes through the glass substrate heating unit 110, and the glass substrate heating unit 110 reaches a process temperature at which the flat film 30 can be smoothly bonded to the glass substrate 10. The glass substrate 10 is heated (step S12).

 On the other hand, the release film 20 is released from the supply roller 311 and conveyed toward the bonding portion 400. (step; S13)

First, the release film 20 enters the release layer forming unit 320. The release layer forming unit 320 removes foreign matters from the release film 20 by spraying a cleaning gas or a cleaning liquid onto the release film 20. The release layer forming unit 320 sprays the liquid raw material of the release layer 21 to form the release layer 21 on one surface of the release film 20.

Subsequently, the release film 20 on which the release layer 21 is formed enters the flat film stacking unit 330. At this time, the back surface of the release film 20 is supported by the support roller 335. The flat film stacking unit 330 forms the flat film 30. That is, the transfer film 31 is supplied to the application roller 332, the application roller 332 is rolled to apply the liquid raw material to the transfer film 31. As the transfer film 31 coated with the liquid raw material of the flat film 30 passes through the extrusion roller 333, the flat film 30 is formed, and a flat surface is formed on one surface of the flat film 30. The flat film 30 is transferred to the lamination roller 334, the lamination roller 334 is engaged with the support roller 335 is rolling operation. Accordingly, the flat film 30 is laminated on the release layer 21. (step S15)

Subsequently, the release film 20 enters the release layer curing unit 340. The release film 20 is exposed or heated while passing through the release layer curing unit 340 to cure the release layer 21. As the release layer 21 coated with the liquid raw material is cured as described above, the flat film 30 bonded to the glass substrate 10 may be smoothly peeled from the release film 20. (Step S16)

Subsequently, the release film 20 enters the bonding part 400. As the release film 20 enters the bonding portion 400, the release film 20 is pressed by the pressure roller 410, and the flat film 30 is bonded to the glass substrate 10. )

Subsequently, the glass substrate 10 to which the flat film 30 is bonded is fed into the first curing unit 430, and the flat film 30 enters the glass substrate 10 as the first curing unit 430 enters the glass substrate 10. It is exposed to light or heated to cure. As the flat film 30 is cured as described above, the flat film 30 may be tightly coupled to the glass substrate 10 (step S18).

Subsequently, the glass substrate 10 enters the peeling unit 350. The release film 20 is spaced apart from the flat film 30 by a first peeling roller 351 at a predetermined angle, and completely peeled from the flat film 30 by the second peeling roller 351. The release film 20 peeled from the flat film 30 is wound around the discharge roller 312. (step S19)

Meanwhile, the glass substrate 10 on which the flat film 30 is bonded and the release film 20 is peeled off enters the second curing unit 120. The flat film 30 may be cured by being exposed or heated once more by the second curing unit 120. As the flat film 30 is cured once more by the second curing unit 120 as described above, the flat film 30 may be more tightly coupled to the flat film 30 and the glass substrate (step S20).

As described above, the flat surface forming apparatus 100 and the method of the glass substrate according to the present embodiment are coupled to the glass substrate 10 by forming the flat film 30 having the flat surface, so that the flat surface of the glass substrate 10 To form.

Therefore, the flat surface forming apparatus and method of the glass substrate according to the present embodiment can easily form a flat surface on the large-area glass substrate 10, the productivity is improved because the flat surface of the glass substrate is formed in an in-line manner Since the flatness formed on the flat film is formed on the glass substrate, it is possible to produce a high quality glass substrate.

In addition, the glass substrate manufactured by the apparatus and method for forming a flat surface of the glass substrate according to the present embodiment may not only have a flat surface, but also closely bond the flat film to the glass substrate, thereby improving durability.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention as long as they are obvious to those skilled in the art.

100: flat surface forming apparatus of the glass substrate
110: glass substrate heating unit 200: glass substrate transfer unit
210: Transfer rail 220: Transfer cart
300: flat film supply unit 310: release film transfer unit
320: release layer forming unit 330: flat film laminating unit
340: peeling layer curing unit 350: peeling unit
400: bonded portion 410: pressure roller
420: first hardening unit

Claims (19)

A glass substrate transfer unit for transferring a glass substrate;
Flat film supply unit for supplying a flat film having a flat surface formed on one surface; And
And a bonding portion for bonding the flat film to the glass substrate to form the flat surface on the glass substrate. The method of claim 1, wherein the flat film supply unit
Release film transfer unit for transferring a release film toward the glass substrate; And
Flat film stacking unit for laminating the flat film on the release film; Flat surface forming apparatus comprising a. The method of claim 2, wherein the flat film supply unit
A release layer forming unit disposed before the flat film lamination unit to clean the release film and to form a release layer on the release film;
A peeling layer curing unit disposed between the flat film stacking unit and the bonding part to cure the peeling layer; and
And a peeling unit disposed after the bonding part to separate the release film from the flat film. The method of claim 2, wherein the release film transfer unit
A feed roller supporting the transfer film provided in a roll shape;
A discharge roller on which the release film peeled from the flat film is wound; and
And a plurality of feed rollers disposed between the feed rollers and the discharge rollers to form a transfer path of the release film. The method of claim 2, wherein the release film transfer unit
And a plurality of feed rollers for circulating the release film in a closed curve shape. The method of claim 2, wherein the flat film stacking unit
A support roller for rolling the release film;
A raw material container in which the liquid raw material of the flat film is accommodated;
A rolling roller which is rolled to allow the liquid raw material accommodated in the raw material container to be applied to a transfer film;
An extrusion roller for extruding the transfer film coated with the liquid raw material to form the flat film; and
And a lamination roller which receives the flat film from the extrusion roller and engages the support roller to roll to roll the flat film onto the release film. The method of claim 1, wherein the bonding portion
And a pressing roller for pressing the release film toward the glass substrate. The method of claim 7, wherein the bonding portion
And a first curing unit to cure the release film bonded to the glass substrate. The method of claim 1, wherein the glass substrate transfer unit
Conveying rail; and
And a conveying bogie for supporting the glass substrate and linearly conveying it along the conveying rail. The method of claim 1,
And a glass substrate heating unit disposed before the bonding portion to heat the glass substrate so that the flat film can be fused to the glass substrate. The method of claim 1, wherein the bonding portion
A pressure roller for contacting the flat film to the glass substrate and pressing the flat film; and
And a first curing unit for curing the flat film bonded to the glass substrate. 12. The method of claim 11,
And a second curing unit disposed after the cemented portion to further cure the flat film discharged from the cemented portion. A glass substrate transfer step of transferring the glass substrate;
A flat film supplying step of supplying a flat film having a flat surface formed on one surface thereof; and
And bonding the flat film to the glass substrate to form the flat surface on the glass substrate. The method of claim 13, wherein the flat film supply step
A release film transfer step of transferring a release film toward the glass substrate; and
Flat film stacking step of laminating the flat film on the release film; Method of forming a flat surface of a glass substrate comprising a. The method of claim 14, wherein the flat film supply step
A release layer forming step of cleaning the release film and forming a release layer on the release film before the flat film laminating step; and
And a peeling layer curing step of curing the peeling layer between the flat film stacking step and the bonding step. The method of claim 13, wherein after the bonding step
And a peeling step of peeling off the release film from the flat film. The method of claim 13, wherein the bonding step
A pressing step in which the flat film is in contact with the glass substrate and the flat film is pressed;
The first curing step of curing the flat film; Flat surface forming method comprising a. 18. The method of claim 17, wherein prior to the cementing step,
And a glass substrate heating step of heating the glass substrate so that the flat film is fused to the glass substrate. The method of claim 18, wherein after the coalescing step,
Flat surface forming method of the glass substrate, characterized in that it further comprises a second curing step of the flat film is further cured.

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