KR101710224B1 - Roll printing apparatus and roll printing method using the same - Google Patents

Abstract

The present invention relates to a roll printing apparatus and a roll printing method using the roll printing apparatus. More particularly, the present invention relates to a roll printing apparatus and a roll printing method using the same, The present invention relates to a roll printing apparatus and a roll printing method using the same, which can easily improve the productivity by preventing the time lag due to the cleaning of the coating nozzle.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a roll printing apparatus and a roll printing method using the roll printing apparatus,

The present invention relates to a roll printing apparatus and a roll printing method using the roll printing apparatus. More particularly, the present invention relates to a roll printing apparatus and a roll printing method using the same, The present invention relates to a roll printing apparatus and a roll printing method using the same, which can prevent the time loss due to the cleaning of the coating nozzle and thereby improve the productivity.

The roll printing apparatus and the roll printing method using the same according to the present invention can be applied to roll-to-roll off-set printing of a metal mesh for a touch panel.

In general, fine patterns used in semiconductor circuit devices and display devices such as LCDs and PDPs are formed by photolithography using a photoresist and are generally manufactured through coating, exposure, development, cleaning, and curing.

However, although photolithography has the advantage of precisely obtaining a desired pattern, it is necessary to perform a lot of steps, to use various materials to maximize the effect of the photoresist, and to use a large amount The photoresist of the photoresist is consumed.

In recent years, a technique of obtaining a fine pattern by a roll printing method has been proposed and researched to overcome the shortcomings of such photolithography.

The roll printing apparatus and method for pattern formation can be applied in various ways and can be applied not only to a color and BM (Black Matrix) pattern of R (Red), G (Green), and B Film Transistor), PDP (Plasma Display Panel), and pattern transfer of barrier rib material.

These general roll printing apparatuses generally comprise a cotter, a printing roll, a printing roll driving apparatus, a cliche or a substrate stage and a driving device for the stage line as the most basic components, and additionally, they are absorbed in the cleat and / A drying device for drying the blanket by absorbing the solvent, and various sensor devices may be additionally provided.

In such off-set printing, when at least one clamp is required due to the manufacturing characteristics of the printing roll (or blanket roll) and when the diameter of the printing roll becomes large, the jumping of the coating portion (or DIE COATER) Is required.

On the other hand, when a printed matter is applied to a printing roll using a die coater, the application of the printed matter must be uniformly performed to improve the precision and print quality of the printed pattern formed through the printing process.

However, application of the print through the die coater is intermittently performed for a predetermined period of time (as described above), and if the volatility of the solvent in the print is high, some of the material is also laminated around the coating nozzle portion during coating, There is a problem that the quality can be deteriorated. For example, prints remaining around the coating nozzles in the course of applying the prints cause non-uniform application of the prints in the process of applying the prints to the next roll, resulting in poor print pattern accuracy and print quality. Furthermore, when the printed matter has a low viscosity (for example, 10 cps or less), liquid dropping occurs.

Therefore, in order to prevent foreign substances from adhering to the periphery of the coated nozzle portion, a cleaning operation of the nozzle portion is required. In particular, it is important to research and develop an apparatus or a method capable of preventing a time loss from being caused by the cleaning operation of such a coating nozzle and continuously improving the productivity by applying a printed matter to a printing roll.

(Patent Document 1) Korean Patent Publication No. 2010-0059240 (Patent Document 2) Korean Published Patent Application No. 2007-0113524

Accordingly, it is an object of the present invention to provide an apparatus and a method for roll-to-roll printing of a metal mesh for a touch panel, in which a printing roll is alternately coated using one or more coating portions and the coating nozzles used for coating are successively cleaned, An apparatus and a method capable of preventing time loss due to nozzle cleaning and further improving productivity and print quality are proposed.

According to an aspect of the present invention, there is provided a printing apparatus comprising: a printing roll for transferring a printed matter pattern to a printed film; At least one coating portion for applying a print to the printing roll; And driving means for reciprocating the at least one coating portion in the front, rear, left, and right directions, or rotationally moving the at least one coating portion in the lateral direction, wherein the at least one coating portion alternately applies the printing material to the printing roll, Device.

Further, it is preferable that each of the at least one coating portion includes two coating heads.

The roll printing apparatus further includes at least one cleaning roll, and the at least one cleaning roll cleans the coating nozzles of the other coating portion while the one coating portion applies the print to the printing roll.

The at least one cleaning roll may clean the coating nozzle in such a manner that when the coating nozzle is in contact with the cleaning roll, the cleaning roll rotates to remove foreign matter attached to the coating nozzle.

Here, it is preferable that the diameter of the at least one cleaning roll is changed according to the number of coating nozzles that can be cleaned at one time.

The at least one cleaning roll may be formed of a material having elasticity and absorbency. The diameter of the printing roll is preferably about 100 mm to about 3,000 mm, and the directing speed of the cleaning roll is preferably about 10 mm or more.

In addition, the at least one coating portion may include a first coating portion and a second coating portion, and the driving means may be configured such that the coating nozzle of the second coating portion is cleaned while the first coating portion applies the print to the printing roll, The first and second coating portions are moved such that the coating nozzle of the first coating portion is cleaned while the second coating portion applies the print to the printing roll.

The roll printing apparatus may further include at least one cleaning roll provided at a position corresponding to the movement position of the first and second coating portions to clean the coating nozzles of the first and second coating portions.

In order to solve the above problems, the present invention provides a roll printing method using the roll printing apparatus described above.

In particular, the present invention relates to a method of making a coating, comprising: a) applying a print to a printing roll using a first coating; b) moving the second coating portion above the printing roll while moving the first coating portion in at least one of the forward, backward, left-right and right-and-left symmetry directions using the driving means; And c) applying the print to the printing roll using the second coating.

In addition, in the step c), it is preferable that the method further comprises cleaning the coating nozzle of the first coating part using a cleaning roll.

The cleaning roll may clean the coating nozzle in such a manner that when the coating nozzle comes into contact with the cleaning roll, the cleaning roll rotates to remove foreign matter attached to the coating nozzle.

Here, the roll printing method is preferably an off-set printing method.

According to the present invention, by alternately coating the printing rolls using one or more coating portions and continuously cleaning the coating nozzles used in coating, it is possible to prevent time loss due to cleaning of the coating nozzle, thereby improving productivity .

Specifically, the first coating portion cleans the coating nozzle of the second coating portion while applying the print to the printing roll, and the roll coating process is performed in such a manner that the first coating portion is cleaned while the second coating portion applies the print to the printing roll , It is possible to continuously perform the cleaning operation and the coating operation on the printing roll, thereby preventing the time loss from occurring.

Particularly, there is also the effect that the coating and cleaning treatment can be carried out in various ways by reciprocating the at least one coated part in the front, rear, left and right directions, or rotationally moving in the lateral direction based on the printing roll.

With the above-described effects, the overall printing quality can be improved and the printing precision can be improved.

Furthermore, the roll printing apparatus and the roll printing method using the roll printing apparatus according to the present invention can be effectively applied to a reverse offset printing method of roll-to-roll of a metal mesh for a touch panel.

FIG. 1 is a schematic view of a roll printing apparatus 100 according to an embodiment of the present invention. FIGS. 1 (a) and 1 (b) illustrate an operating state of the roll printing apparatus 100 as an example Fig.
FIG. 2 is a view schematically showing an operating state of the cleaning roll 40 used in the roll printing apparatus 100 according to an embodiment of the present invention.
3 is a schematic view of a roll printing apparatus 100 'according to another embodiment of the present invention. Figs. 3 (a) and 3 (b) illustrate the operation state of the roll printing apparatus 100 as an example Fig.
Fig. 4 is a schematic view of a roll printing apparatus 100 "according to another embodiment of the present invention. Figs. 4 (a) and 4 (b) Fig.

Hereinafter, preferred embodiments of a roll printing apparatus and a roll printing method using the roll printing apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines and the size of the constituent elements shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, the definitions of these terms should be described based on the contents throughout this specification.

FIG. 1 is a schematic view of a roll printing apparatus 100 according to an embodiment of the present invention. FIGS. 1 (a) and 1 (b) illustrate an operating state of the roll printing apparatus 100 as an example Fig. FIG. 2 is a view schematically showing an operating state of the cleaning roll 40 used in the roll printing apparatus 100 according to an embodiment of the present invention.

1 and 2, a roll printing apparatus 100 according to an embodiment of the present invention may include a printing roll 10, one or more coating portions 20a and 20b, and a driving means 30 . It may further comprise one or more cleaning rolls 40.

Meanwhile, the roll printing apparatus 100 according to an embodiment of the present invention may include a feeder for controlling the driving and position of the winding unit and the recovery unit, such as the components of the printed film winding unit, the recovery unit, Various control units; And a position control unit (e.g., an EPC) for adjusting the winding position of the recovery unit, but the detailed description thereof will be omitted unless it is a core technical element of the present invention.

The printing roll 10 (or blanket roll) performs a role of transferring a printed pattern to a printed film (not shown). At this time, the printed material is applied to the printing roll 10 by coating portions 20a and 20b to be described later, and after some printed matter is removed by a cliche (not shown) provided on the stage for cliche mounting (not shown) Is transferred onto the print film placed on the print film support (not shown).

Although not shown, the printing roll 10 is provided at a point at which a printing material is applied to the printing roll 10 by coating portions 20a and 20b described later, at a point where a printing material pattern is formed on the printing roll 10 by a cliche And a position at which the printed matter pattern is transferred to the printed film is freely movable.

It should be noted that the material to be printed or the thickness thereof is not particularly limited as long as the printed film is provided continuously or intermittently by driving of the winding part and the recovery part, and the printed material pattern to be printed can be effectively transferred. However, in the roll printing apparatus 100 according to an embodiment of the present invention, it is preferable that a metal mesh for a terry panel is used as a printed film.

The one or more coating portions 20a and 20b serve to apply (or coat) the printing material to the printing roll 10.

For this purpose, the one or more coating portions 20a, 20b may be a DIE COATER which applies a relatively thin coating of a large area on a substrate such as a slurry, a printing composition and a coating liquid.

The one or more coating portions 20a and 20b may each include coating heads 21a and 21b accommodating prints therein and coating nozzles 22a and 22b positioned under the coating head in the form of nozzles This configuration makes it possible to uniformly apply the print to the printing roll 10.

The base frames 32a and 32b are attached to the upper sides of the coating heads 21a and 21b and can be moved in various ways and directions by the driving means 30 to be described later. ) Will be described together with the driving means 30.

Although the coating portions 20a and 20b are described as including one coating head 21a and 21b in the present specification, two coating heads are attached to the coating portions 20a and 20b, respectively, ) ≪ / RTI > coating.

The driving means 30 performs a function of reciprocating the one or more coating portions 20a, 20b in the front, rear, left, and right directions, or rotating the one or more coating portions 20a, 20b in the left and right directions.

The driving means 30 may include base frames 32a and 32b which are coupled to the lower side of the guide rails 31 and the guide rails 31 and can move along the guide rails 31. [

The coating portion 20a connected to the lower side of the base frame 32a and the coating portion 20b connected to the lower side of the base frame 32b are disposed on the upper side of the printing roll 10, It is possible to freely move back and forth to the left and right sides.

Further, when the coating portion 20a is applied to the printing roll 10 and moves to the left side, the coating portion 20b on the right side moves to the upper side of the printing roll 10, 10 of the present invention.

On the other hand, the driving means 30 is not limited to the above-described components, and performs reciprocating and rotational movement using various components (e.g., a server motor, a linear motor, a rack and pinion, .

One or more cleaning rolls 40 serve to clean the coating nozzles 22a, 22b.

The cleaning roll 40 is provided to be positioned on the left and right sides of the printing roll 10, respectively, and one coating portion serves to clean the coating nozzle of the other coating portion while applying the print to the printing roll 10 .

At this time, it is preferable that at least one cleaning roll 40 is provided at a lower portion corresponding to the movement position of the coating portions 20a, 20b.

2, when the cleaning nozzles 22a and 22b are brought into contact with the cleaning roll 40, the cleaning roll 40 is rotated while the coating rolls 40 are attached to the coating nozzles 22a and 22b The coating nozzles 22a and 22b are cleaned by removing the foreign matter.

For this, the cleaning roll 40 is preferably made of a material having elasticity, but it is not limited thereto, but it is preferably formed of a material which is easy to deform and absorbs residual prints on the periphery of the coating nozzle.

Note also that such a cleaning roll 40 may be set to vary in diameter depending on the number of coating nozzles that can be cleaned at one time. It should be noted that, for example, one coating nozzle may be cleaned by one cleaning roll 40, and two coating nozzles may be cleaned by one cleaning roll 40 that is twice as large in diameter.

The following is a description of the application of the printed material by such a constitution and the principle of continuous cleaning of the coating nozzle.

The second coating portion 20b is located on the right upper side of the printing roll 10 while the first coating portion 20a is located on the upper side of the printing roll 10 and the printing material is applied to the printing roll 10, The coating nozzle 22b is cleaned by the cleaning unit 40.

At this time, when the first coating portion 20a needs to be jumped by the clamp on the printing roll 10, the first coating portion 20a is moved to the upper left side of the printing roll 10 by the driving means 30 And the second coated portion 20b moves to the upper side of the printing roll 10. [

The first coating portion 20a is positioned at the upper left of the printing roll 10 while the second coating portion 20b is located on the upper side of the printing roll 10 and the printing material is applied to the printing roll 10, The coating nozzle 22a is cleaned by the roll 40. [

According to the present invention, according to the present invention, not only the printing rolls 10 are alternately coated using one or more coating portions 20a and 20b, but also the coating nozzles 22a and 22b used for coating are continuously cleaned Thus, time loss due to the cleaning of the coating nozzles 22a and 22b can be prevented, and productivity can be further improved.

3 and 4 are views schematically showing a roll printing apparatus 100 ', 100 "according to another embodiment of the present invention.

The roll printing apparatuses 100 'and 100' 'shown in FIGS. 3 and 4 are different from the roll printing apparatus 100 shown in FIG. 1 in that the rollers of the coating units 20a and 20b Only the number and position of the cleaning rolls 40 are different, and the remaining components perform the same function and role. Hereinafter, a description of the same components will be omitted, and only the different components will be specifically described .

3, the coating units 20a and 20b are configured to reciprocate forward and backward of the printing roll 10 by the driving unit 30, and the cleaning roll 40 rotates the front and rear portions of the printing roll 10, Respectively.

In this case, as described above, one coating portion 20a is used to clean the coating nozzle of the other coating portion 20b while applying the print to the printing roll 10, and this coating and cleaning method is repeatedly performed Thus, time loss due to cleaning can be prevented and a continuous printing process can be performed.

4, the coating units 20a and 20b are configured to be rotated in the left-right direction by the driving unit 30, and the cleaning roll 40 is configured to be positioned only on the left or right side of the printing roll 10 .

In this case, one coating portion 20a cleans the coating nozzle of the other coating portion 20b while applying the print to the printing roll 10, and the coating process of the printing roll 10 and the coating nozzles 22a, 22b are successively carried out, time loss due to cleaning can be prevented and a continuous printing process can be performed.

In addition, roll printing can be performed using the roll printing apparatus 100 according to the present invention. In this case, the roll printing method according to an embodiment of the present invention will be described as follows.

The printed material is applied to the printing roll 10 using the first coating portion 20a.

At this time, the second coating portion 20b is located on the left or right upper side of the printing roll 10, not on the upper side.

Next, the second coating portion 20b is placed on the upper side of the printing roll 10 while the first coating portion 20a is moved in at least one of forward, backward, left-right and right-and-left symmetry directions using the driving means 30 .

Next, the printed material is applied to the printing roll 10 by using the second coating portion 20b. At the same time, the coating nozzle 22a of the first coating portion 20a is cleaned by using the cleaning roll 40. [

The cleaning roll 40 rotates the cleaning roll 40 when the coating nozzles 22a and 22b come into contact with the cleaning roll 40. The cleaning roll 40 rotates the cleaning roll 40 to remove foreign matters adhered to the coating nozzles 22a and 22b, The nozzles 22a and 22b are cleaned.

Further, the cleaning roll 40 is preferably made of a material having elasticity and absorbency. The diameter of the printing roll 10 is preferably about 100 mm to about 3,000 mm, and the directing of the cleaning roll 40 is preferably about 10 mm or more.

As described above, according to the roll printing apparatus and the roll printing method using the roll printing apparatus according to the present invention, not only the printing rolls are alternately coated using one or more coating portions, but also the coating nozzles used for coating are continuously cleaned, (2) preventing time loss due to cleaning of the coating nozzle, (3) improving print quality and improving printing accuracy, and (4) improving productivity. A roll printing apparatus and a roll printing method using the roll printing apparatus can be provided.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the present invention can be changed.

10: printing roll
20a and 20b:
21a, 21b: Coating head
22a, 22b: coating nozzle
30: Driving means
31: Guide rail
32a, 32b: base frame
40; Cleaning roll

Claims (13)

A printing roll for transferring the printed matter pattern to the printed film;
At least two coating portions for applying a print to the printing roll; And
And driving means for causing the two or more coating portions to reciprocate in the front, rear, left, and right directions, or rotationally move in the left and right directions,
Characterized in that the two or more coating portions alternately apply the print to the printing roll.
Roll printing device.
The method according to claim 1,
Characterized in that the two or more coating portions each comprise two coating heads.
The method according to claim 1,
Wherein the roll printing apparatus further comprises at least one cleaning roll, and
Wherein the one or more cleaning rolls clean the coating nozzles of the other coating portion while one coating portion applies the print to the printing roll.
Roll printing device.
The method of claim 3,
Wherein the at least one cleaning roll comprises:
And cleaning the coating nozzle in such a manner that when the coating nozzle contacts the cleaning roll, the cleaning roll rotates to remove foreign matter adhering to the coating nozzle.
Roll printing device.
The method of claim 3,
Wherein the at least one cleaning roll comprises:
Characterized in that the diameter is changed according to the number of coating nozzles which can be cleaned at one time.
Roll printing device.
The method of claim 3,
Characterized in that the at least one cleaning roll is formed of a material having elasticity and absorbency.
Roll printing device.
The method of claim 3,
Characterized in that the diameter of the printing roll is 100 mm to 3,000 mm.
Roll printing device.
3. The method according to claim 1 or 2,
Wherein the at least one coating portion comprises a first coating portion and a second coating portion,
The driving means includes:
The coating nozzle of the second coating portion is cleaned while the first coating portion applies the print to the printing roll and the coating nozzle of the first coating portion is cleaned while the second coating portion applies the print to the printing roll , And moving the first and second coating portions.
Roll printing device.
9. The method of claim 8,
The roll printing apparatus includes:
Further comprising at least one cleaning roll provided at a location corresponding to a movement position of the first and second coating portions to clean the coating nozzles of the first and second coating portions.
Roll printing device.
A roll printing method using the roll printing apparatus according to claim 1 or 2.
a) applying a print to a printing roll using a first coating;
b) moving the second coating portion above the printing roll while moving the first coating portion in at least one of the forward, backward, left-right and right-and-left symmetry directions using the driving means; And
and c) applying a print to the printing roll using the second coating.
Roll printing method.
12. The method of claim 11,
In the step c)
Further comprising the step of cleaning the coating nozzle of said first coating portion using a cleaning roll,
Roll printing method.
13. The method of claim 12,
The cleaning roll
And cleaning the coating nozzle in such a manner that when the coating nozzle contacts the cleaning roll, the cleaning roll rotates to remove foreign matter adhering to the coating nozzle.
Roll printing method.

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