KR100812313B1 - Device using rollers for coating - Google Patents

Abstract

The present invention relates to a roll coating apparatus, comprising a roll coating apparatus for manufacturing an optical sheet using a master sheet formed with a tooth pattern and a fine pattern of various shapes at regular intervals, three times in a pattern formed on the master sheet After applying the UV curable coating over the film to be dipped in, through the two UV curing to dry quickly there is a feature that can increase the production speed without generating bubbles on the surface of the printed film.

The present invention is largely composed of four parts, one side of which is formed in a sawtooth pattern, the other side is formed of a smooth surface and a cylindrical shape to rotate while supporting the master sheet (11) A master part 10 composed of a supporting roll 12 and a rotating roll 13 for continuously rotating the master sheet 11; It is installed on the upper and lower portions of the master portion 10 and rotates in contact with the feed roll 21 and the support roll 12 for transferring the film 50 so that the ultraviolet curable paint is formed on the surface of the film 50 A conveying unit 20 composed of a pressing roll 22; First, second, and third guide rolls 31a, 31b, and 31c, and the first and second, respectively, formed at the lower end of the master part 10 so as to supply the ultraviolet curable paint to the surface of the master sheet 11 in three steps. A paint supply unit 30 composed of three printing rolls 32a, 32b, and 32c; Consists of a hardened portion 40 composed of the first and second curing devices 41 and 42 to cure the ultraviolet curable paint formed on the surface of the film 50, thereby suppressing the occurrence of bubbles when forming a fine pattern and quickly It has an approximate configuration that allows it to be formed.

According to the present invention configured as described above, after cutting and connecting a master sheet having a predetermined shape to a desired length, the optical sheet is manufactured by using the master sheet, but is sequentially installed on the bottom of the master part one to two times. The UV curable paint is laminated and supplied in a pattern through the paint supply part, thereby minimizing the occurrence of bubbles in the cured paint, thereby producing a high quality sheet for optics.

In addition, it is possible to improve the accuracy of coating thickness by supplying UV curable paint in three patterns in one pattern and curing through UV in two times. There is another effect that can speed up the production of.

Optic sheet, master sheet, film, UV curable paint

Description

Roll Coating Equipment {DEVICE USING ROLLERS FOR COATING}

1 is a cross-sectional view showing a schematic configuration according to the present invention.

2 is a partially enlarged cross-sectional view according to the present invention.

[Description of Code for Major Parts of Drawing]

10: master unit 11: master

12: support roll 13: rotary roll

20: feeder 21: feed roll

22: pressure roll 30: paint supply

31a: first guide roll 31b: second guide roll

31c: 3rd guide roll 32a: 1st printing roll

32b: second printing roll 32c: third printing roll

40: hardening part 41: first curing apparatus

42: second curing apparatus 50: film

The present invention relates to a roll coating apparatus, comprising a roll coating apparatus for manufacturing an optical sheet using a master sheet formed with a tooth pattern and a fine pattern of various shapes at regular intervals, three times in a pattern formed on the master sheet The present invention relates to a roll coating apparatus for applying a UV curable paint over and then dipping the film, and rapidly drying through two UV curings to increase the production speed without generating bubbles on the printed surface.

Recently, liquid crystal display (LCD), which has been spotlighted as an image display means, has a very low power consumption unlike a conventional cathode ray tube, and is thin and light because it does not use an electron gun. Since the liquid crystal display does not emit light by itself, in order to obtain a necessary light source, a light source device called a back light unit is generally used, which is located at the back of the LCD panel. It acts as a back light source and consists of parts such as mold frame, LGP (light guide plate), lamp, reflector plate, diffusion sheet, and prism sheet.

The optical sheet used in the backlight unit is made of a transparent polymer material having a serrated, rounded surface on one side and a smooth surface opposite to the other side, and the incident light rays are refracted A substantial portion of the incident light hitting the serrated or smooth surface is transmitted, and the rest is totally reflected.

In producing such an optical sheet, an ultraviolet curable paint (photopolymer) is applied to one surface of the film transferred between the master roll and the press roll having a fine pattern formed thereon, and the ultraviolet cured paint by the master roll and the press roll. The sheet | seat for optics required by the roll coating apparatus which consists of a method of irradiating and hardening an ultraviolet-ray to the film which formed the sawtooth-shaped fine pattern at the regular interval by pressing the surface of the film to which it was apply | coated is produced.

As such, when the roll coating apparatus used for optical sheet production is used for a long time, the surface of the master roll is worn or deformed or needs to be replaced in order to change the design of the pattern. Not only easy but also difficult to produce optical sheets having various sizes, such as cost, time, etc. are difficult, and the weight is heavy, so transportation is carried out using various heavy machinery such as forklifts or cranes, and thus, in performing replacement work. As well as the difficulty, there is a problem that is not efficient because the cost, time wasted to waste a lot of time for the replacement work.

In addition, since the UV cured paint is supplied from a position adjacent to the master roll, bubbles are often embedded in the cured paint, and thus act as a defective element. There is a situation.

Accordingly, the present invention has been invented in view of the above problems, and after cutting and connecting a master sheet having a predetermined shape to a desired length, the optical sheet is manufactured by using the master sheet, but at the bottom of the master part 1, 2 · It is aimed to make high quality optical sheet by minimizing bubble generation inside the cured paint by supplying it in the form of lamination of UV cured paint in the pattern through the paint supply part sequentially installed over three times.

In addition, it is possible to improve the accuracy of coating thickness by supplying UV curable paint in three patterns in one pattern and curing through UV in two times. Another aim is to increase the speed of production.

The present invention relates to a roll coating apparatus, comprising a roll coating apparatus for manufacturing an optical sheet using a master sheet formed with a tooth pattern and a fine pattern of various shapes at regular intervals, three times in a pattern formed on the master sheet After applying the UV curable coating over the film to be dipped in, through the two UV curing to dry quickly there is a feature that can increase the production speed without generating bubbles on the surface of the printed film.

The present invention is largely composed of four parts, one side of which is formed in a sawtooth pattern, the other side is formed of a smooth surface and a cylindrical shape to rotate while supporting the master sheet (11) A master part 10 composed of a supporting roll 12 and a rotating roll 13 for continuously rotating the master sheet 11; It is installed on the upper and lower portions of the master portion 10 and rotates in contact with the feed roll 21 and the support roll 12 for transferring the film 50 so that the ultraviolet curable paint is formed on the surface of the film 50 A conveying unit 20 composed of a pressing roll 22; First, second, and third guide rolls 31a, 31b, and 31c, and the first and second, respectively, formed at the lower end of the master part 10 so as to supply the ultraviolet curable paint to the surface of the master sheet 11 in three steps. A paint supply unit 30 composed of three printing rolls 32a, 32b, and 32c; Consists of a curing unit 40 composed of the first and second curing devices 41 and 42 to cure the ultraviolet curable paint formed on the surface of the film 50, thereby suppressing the occurrence of bubbles in the formation of a fine pattern and quickly It has an approximate configuration that allows it to be formed.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view showing a schematic configuration of the present invention, Figure 2 is an enlarged cross-sectional view of the main portion of the present invention, first, look at the configuration of the master unit 10, as shown, the master unit 10 is a master sheet (11), consisting of a support roll 12, a rotary roll 13, the master sheet 11 is configured in a thin sheet form, one side is a sawtooth-shaped fine pattern is formed at regular intervals, the other The sides have a smooth shape.

The master sheet 11 is a surface formed by forming a fine pattern using an optical sheet manufactured by the conventional method or the method of the present invention, and then cut to a predetermined length, and then formed a sawtooth-shaped fine pattern After the supporting roll 12 and the rotary roll 13 are mounted on the first, second and third guide rolls 31a, 31b, and 31c so as to face the outside, both ends are joined to each other for use.

As well as the sawtooth fine pattern as described above is configured to be uniformly formed in a fine pattern having a variety of shapes as needed.

On the other hand, the support roll 12 is in the form of a cylindrical roll having a large diameter, which is installed to abut the pressure roll 22 to be described later, by transporting the master sheet 11 while continuously rotating in a fixed state, the pressure roll 22 ) To support the fine pattern to be formed well.

In addition, the rotary roll 13 has a configuration to continuously rotate the master sheet 11 with the support roll 12 while continuing to rotate in a fixed state.

Looking at the configuration of the conveying roll 21 and the pressure roll 22 constituting the conveying unit 20, first, the conveying roll 21 is to help the conveying of the film 50 while rotating in a fixed state, the film The upper portion of the support roll 12, the lower portion of the support roll 12, and the front side of the second curing device 42, respectively, along the transfer path of the 50 is configured so that the film 50 can be smoothly transferred. Has

In addition, looking at the configuration of the pressure roll 22 is installed on top of the support roll 12 to rotate in contact with the support roll 12, the master sheet passing between the support roll 12 and the pressure roll 22 Pressing the film (11) and the film (50) to transfer the ultraviolet curable paint formed on the master sheet 11 to the film (50) to form a fine pattern on the film (50), the pressure roll (22) Silver can be flowed up and down is configured to adjust the pressure width according to the thickness of the film 50 and the master sheet (11).

On the other hand, the paint supply unit 30 is formed on the lower end of the master unit 10 to supply the UV cured paint to the master sheet 11 in three stages of the first, second, third guide rolls (31a, 31b, 31c) And first and second printing rolls 32a, 32b, and 32c.

The first, second, and third guide rolls 31a, 31b, and 31c are installed and rotated at regular intervals to contact the inner surface of the master sheet 11, and the first, second, and third printing rolls (1, 2, 3 printing rolls) 32a, 32b, and 32c are provided in contact with the surface of the master sheet 11, the ultraviolet curable paint is supplied from the first and second printing rolls 32a, 32b, and 32c, and the first, second, and third guides are provided. When rotated in contact with the rolls (31a, 31b, 31c) has a configuration in which the ultraviolet curable paint is fed and laminated step by step between the sawtooth-shaped fine pattern formed on the surface of the master sheet (11).

In other words, about 1/3 of the inside of the groove formed in the fine pattern is filled by the first guide roll 31a and the first printing roll 32a, and then the second guide roll 31b and the first printing roll 32a are filled. The inside of the groove formed in the fine pattern is filled by 2/3, and finally, the inside of the groove formed in the fine pattern is filled by the third guide roll 31c and the third printing roll 32c. When the ultraviolet curable paint is supplied to the inside, the generation of bubbles is suppressed.

In addition, the curing unit 40 configured to cure the ultraviolet curing paint formed on the surface of the film 50 is composed of the first and second curing devices 41 and 42, and the first curing device 41 is supported. It is formed along the outer circumferential surface of one side of the roll 12, the shape is formed in the form of a rounded arc is configured to irradiate the back of the film 50 with ultraviolet rays to complete the curing primarily.

After that, when the primary cured film 50 is transferred by the transfer roll 21, the UV cured paint formed on the surface of the film 50 by the second curing device 42 installed perpendicular to the bottom part. It has a structure which is produced quickly by directly irradiating and curing ultraviolet rays.

The film 50 used is commonly used to produce an optical sheet, and is continuously supplied while being transported by the feed roll 21.

Looking at the operating process of the present invention configured as described above, first, the master sheet 11 is mounted on the support roll 12 and the rotary roll 13 and the first, second and third guide rolls (31a, 31b, 31c) To rotate, the film 50 is mounted on the feed roll 21 and the pressure roll 22 to be continuously supplied.

When the master sheet 11 and the film 50 are operated as described above, the first, second and third guide rolls 31a, 31b and 31c and the first and second and third printing rolls are formed on the surface of the master sheet 11. UV curing paint is applied by (32a, 32b, 32c), the master sheet 11 and the film 50 is pressed between the pressing roll 22 and the support roll 12 is applied to the master sheet 11 Ultraviolet cured paint is transferred to the surface of the film 50 in a fine pattern of teeth.

Thereafter, the curing is performed primarily by the first curing device 41, and is transferred by the transfer roll 21 to be cured secondarily by the second curing device 42, thereby completing the optical sheet required. do.

According to the present invention configured as described above, after cutting and connecting a master sheet having a predetermined shape to a desired length, the optical sheet is manufactured by using the master sheet, but is sequentially installed on the bottom of the master part one to two times. The UV curable paint is laminated and supplied in a pattern through the paint supply part, thereby minimizing the occurrence of bubbles in the cured paint, thereby producing a high quality sheet for optics.

In addition, it is possible to improve the accuracy of coating thickness by supplying UV curable paint in three patterns in one pattern and curing through UV in two times. There is another effect that can speed up the production of.

Claims (3)

In the roll coating apparatus, The master sheet 11 is formed in a sawtooth pattern on one side and the smooth surface is formed on the other side, and the cylindrical support roll 12 and the master sheet 11 are rotated while supporting the master sheet 11. Master part 10 consisting of a rotary roll 13 for continuously rotating; It is installed on the upper and lower portions of the master portion 10 and rotates in contact with the feed roll 21 and the support roll 12 for transferring the film 50 so that the ultraviolet curable paint is formed on the surface of the film 50 A conveying unit 20 composed of a pressing roll 22; First, second, and third guide rolls 31a, 31b, and 31c, and the first and second, respectively, formed at the lower end of the master part 10 so as to supply the ultraviolet curable paint to the surface of the master sheet 11 in three steps. A paint supply unit 30 composed of three printing rolls 32a, 32b, and 32c; Consists of a curing unit 40 composed of the first and second curing devices 41 and 42 to cure the ultraviolet curable paint formed on the surface of the film 50, thereby suppressing the occurrence of bubbles in the formation of a fine pattern and quickly Roll coating apparatus characterized in that to be formed. The method of claim 1, Pressing roll 22 is a roll coating device, characterized in that to be able to flow up and down to adjust the pressure width according to the thickness of the film 50 and the master sheet (11). The method of claim 1, Ultraviolet cured coating material is filled in the grooves formed in the fine pattern by the first guide roll 31a and the first printing roll 32a by 1/3, and the second guide roll 31b and the first printing roll 32a are filled in. The UV cured paint is filled in the groove formed in the fine pattern by 2/3, and the UV cured paint is filled in the groove formed in the fine pattern by the third guide roll 31c and the third printing roll 32c. Roll coating device characterized in that.

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