KR101710228B1 - Roll printing apparatus and roll printing method using the same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll printing apparatus and a roll printing method using the same, and a roll printing apparatus according to the present application includes a conveyor for conveying the cliche, A pattern transfer unit including a film substrate and including a first print film supporting white roll and a second print film supporting white roll which successively provide and recover the film substrate; And a first printing roll and a second printing roll, provided on the conveyor, for transferring the pattern onto the film substrate in contact with the first print film supporting white roll and the second print film supporting white roll, respectively.

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,

This application claims the benefit of Korean Patent Application No. 10-2012-0147564 filed on December 17, 2012 in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference.

BACKGROUND OF THE INVENTION 1. Field of the Invention 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 capable of continuous roll printing and reducing tack time, And a roll printing method using the same.

In general, fine patterns used in semiconductor circuit devices and display devices such as LCDs and PDPs are formed by photolithography using photoresist, and they are generally subjected to steps of coating, exposure, development, cleaning and curing .

However, although photolithography is advantageous in obtaining a desired pattern precisely, it is necessary to carry out a lot of steps, to use many kinds of materials in order to maximize the effect of the photoresist, A large amount of photoresist is consumed in the process of FIG.

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 for pattern formation can be applied to a variety of methods such as offset printing, reverse offset printing, and roll-to-roll printing. The color filter elements R (Red), G (Thin Film Transistor), PDP (Plasma Display Panel), and pattern transfer of barrier rib material as well as color and BM (Black Matrix) pattern of green (B) .

The roll printing apparatus generally comprises a cotter, a printing roll, a printing roll driving apparatus, a cliche or a substrate stage, and a driving device for the stage alignment as basic components, and further includes a cleansing and / or piping cleaning device, A drying device for drying the blanket, and various sensor devices may be additionally provided.

The accuracy of the pattern formed by the roll printing method and the pattern transfer efficiency are evaluated by the coating state from the coater to the roll or the blanket of the roll, the degree of volatilization of the solvent and the waiting time until transfer to the cliche or the substrate after coating, And the pressure applied by the gap between the stage and the roll or blanket.

Particularly, the coating state in the roll or blanket coating, which is the first step of the roll printing process, determines not only the uniformity of the entire pattern but also the formation of various types of stains.

In such a roll printing apparatus, generally, once a printing roll carries out a printing process, a tack time is inevitably required until the printing process, such as preparing the printing roll again and coating the printing roll, There are disadvantages.

Here, tack time refers to the time As the time it takes for the next glass substrate to come back, In the manufacture of a liquid crystal display (LCD), the number of other equipments is adjusted on the basis of the time taken for the glass substrate to be taken out after being carried into the photographic equipment. In the printing roll, (in and out). Due to this tack time, roll printing has a relatively slower production rate than photographic equipment.

Korean Patent Laid-Open Publication No. 10-2011-0005354

The present application aims to provide a roll printing apparatus and a roll printing method using the same that can improve tack time by continuously performing roll printing and improve productivity.

[0002]

A conveyor provided with a cliche and adapted to convey the cliche;

A pattern transfer unit including a film substrate and including a first print film supporting white roll and a second print film supporting white roll which successively provide and recover the film substrate; And

A first printing roll provided on the conveyor and contacting the first printed film supporting white roll and the second printed film supporting white roll to transfer the pattern onto the film substrate,

The present invention also provides a roll printing apparatus.

The present application also provides a roll printing method using the roll printing apparatus.

According to the present application, by using a pair of printing roll devices, one printing roll can perform a printing process while the other printing roll can perform a printing process while returning after performing a printing process, so that the printing can be continuously performed. Accordingly, the present application can reduce the tack time, thereby greatly improving the productivity. Further, at this time, the printed substrate and the substrate for the next printing can be efficiently replaced, thereby improving the productivity.

Figures 1 and 2 schematically illustrate a roll printing apparatus according to one embodiment of the present application.
10: Film substrate
20: die (coating position)
30: die (cleaning position)
40: Conveyor
50: Printed film supporting white roll
60: Cleveland
70: printing roll (off position)
80: printing roll (set position)
90: Floating roll

Hereinafter, the present invention will be described in detail.

A conventional conventional roll printing apparatus basically consists of a coater, a printing roll, a printing roll driving apparatus, a cleche stage, and a substrate stage. A blanket is wound around the printing roll, and a cliche and a substrate are placed on the cliche stage and the substrate stage, respectively. The printing roll can be formed in a cylindrical shape, and a blanket is provided on the outer surface. The blanket may be formed of a rubber material having adhesion with the ink and elasticity.

The printing roll is provided so as to reciprocate relative to the cliche and the substrate, thereby transferring the pattern from the cliche and re-transferring the pattern to the substrate.

The cliche stage and the substrate stage may be installed in a lower frame. The cliche stage and the substrate stage are separately detachable from the lower frame, so that a cliche having various patterns can be applied according to various target patterns.

The printing roll is driven by a driving device such as a printing roll driving motor to move (reciprocate) while rotating on the lower frame. At this time, the blanket provided on the outer surface of the printing roll, The pattern is transferred from the cliche to the substrate by contacting the upper surface of the substrate.

However, in the conventional roll printing apparatus, the roll printing apparatus is provided with a cotter, a printing roll, and the like only on one side thereof. After printing on the substrate by the printing roll, the printing roll is returned to the initial position, The ink is coated on the blanket of the inkjet printer 1 and then printed. This form has the problem that the production efficiency is lower than that of the conventional photolithography process in tact time.

In order to solve the problems of the related art as described above, the present invention can use a pair of printing rollers to perform a printing process while one printing roll performs a printing process, and then another printing roll can perform a printing process Therefore, it is desirable to provide a device capable of continuous roll printing.

The roll printing apparatus according to the present application includes a conveyor provided with a cleaver and conveying the cleaver; A pattern transfer unit including a film substrate and including a first print film supporting white roll and a second print film supporting white roll which successively provide and recover the film substrate; And a first printing roll and a second printing roll, provided on the conveyor, for transferring the pattern onto the film substrate in contact with the first print film supporting white roll and the second print film supporting white roll, respectively.

In the roll printing apparatus according to the present application, a cliche is provided on the conveyor, and the conveyor serves to continuously convey the cliche.

In the roll printing apparatus according to the present application, the pattern transferring unit may further include a print film supplying unit for continuously supplying the film substrate and a print film collecting unit for continuously recovering the film substrate. Further, a first print film supporting white roll and a second print film supporting white roll may be provided between the print film delivering portion and the print film collecting portion.

The print film supply unit may be an unwinder, and the print film recovery unit may be a rewinder.

In the present application, if the film substrate is provided continuously by the driving of the print film supplying unit and the print film collecting unit and the printed pattern to be printed can be transferred, the material or thickness thereof is not particularly limited Do not.

In the present application, the print film delivering unit and the print film collecting unit may continuously provide the film substrate so that the film substrate proceeds in one direction. In the present application, the print film supply unit may be an unwinder, and the print film recovery unit may be a rewinder. Hereinafter, the printed film supply portion is exemplified as the unwinding portion and the printed film recovery portion is exemplified as the winding portion, but the constitution is not particularly limited as long as the film base can be continuously provided.

The driving of the winding unit and the winding unit can be intermittently controlled as needed. In this application, intermittent continuous printing is possible. The term " intermittent continuous printing " as used herein means that the driving of the winding unit and the winding unit is intermittently controlled during a necessary step during the printing process, and the film base mounted on the winding unit and the winding unit is rotated On the support back roll and the second print film supporting white roll, so that the print pattern is transferred. For the intermittent continuous printing as described above, the roll printing apparatus may further include a control section for intermittently controlling the driving of the winding section and the winding section.

The roll printing apparatus according to the present application may further include a position control unit for controlling the position of the film base and the winding unit so that the film base is wound at a position suitable for the winding unit when the film base is wound on the winding unit. The position controller may be an electronic position controller (EPC).

The roll printing apparatus according to the present application is advantageous for printing a precise pattern on the film substrate when tension is applied to the film substrate. For example, it is preferable that the film base is driven so that a tension of not less than 1 Kgf / m (film width), not less than 3 Kgf / m (film width), and not less than 5 to 10 Kgf / m (film width). The tension may be imparted by the driving control of the winding unit and the film base winding unit or a nipping unit described later. In this regard, the roll printing apparatus according to the present application may further include a tension control unit of the film substrate.

Wherein the first print roll is capable of transferring a pattern onto the film substrate by contacting the first print film supporting white roll, and the second print roll is brought into contact with the second print film supporting white roll, The pattern can be transferred.

Wherein the contact between the first print roll and the second print roll and the first print film supporting white roll and the second print film supporting white roll is such that the first print film supporting white roll and the second print film supporting white roll are inclined Or may be performed by operating the first printing roll and the second printing roll up and down.

In addition, the first printable film supporting white roll and the second printable film supporting white roll may be operated up and down in an oblique direction, and the printing process may be performed at a contact point of 30 to 60 degrees with the first printing roll and the second printing roll .

Further, in the present application, the first printing roll and the second printing roll may be provided horizontally to each other with respect to the paper, and may be provided vertically to each other, but are not limited thereto. Accordingly, the film base material can also move horizontally or vertically with respect to the paper.

In the present application, at least one of the first printing roll and the second printing roll, or both the first printing roll and the second printing roll may be formed by a printing process by the first printing roll and a printing by the second printing roll And a control unit capable of adjusting the printing process time interval between the processes. Thus, productivity can be improved in the printing process, and the process cost can be reduced.

The roll printing apparatus according to the present application further comprises a drive motor for rotating the first print film supporting backroll or the second print film supporting backroll while vertically moving the first print roll or the second print roll in the oblique direction .

In the present application, it is preferable that between the winding portion and the first printed film supporting backroll or the second printed film supporting white roll, between the winding portion and the first printable film supporting white roll or the second printed film supporting white roll, or And a second pressing member which is provided between the winding unit and the first printed film supporting backroll or between the second printed film supporting white roll and between the winding unit and the first printed film supporting backroll or the second printed film supporting white roll, And may further include a nipping portion for blocking the tension.

The nipping portion is fixed to the first print film supporting backrol or the second print film supporting backrol and may move together when aligning the first print film supporting backrol or the second print film supporting backrol. The nipping portion is movable up and down together with the first printable film supporting white roll or the second printable film supporting white roll.

In this application, since the film base is continuously provided by the winding unit and the printed film winding unit as described above, it is necessary to adjust the position of the film base so that the pattern can be printed at the correct position during printing, The tension applied to the film needs to be cut off. In the present invention, the tension applied to the film base by the nipping portion can be cut off. In addition, the nipping portion can also function to impart a tension greater than a certain level to the film substrate.

Wherein the nipping portion fixes the film base during the transfer of the printed pattern on the film substrate on the roll type print film supporting portion and the driving of the winding portion and the print film winding portion causes the advancement of the film base It is desirable to move so as not to disturb. And may further include a control unit of the nipping unit.

The nipping portion is moved downward so that the vacuum suction can be efficiently performed by the vacuum suction portion of the first printable film supporting white roll or the second print film supporting white roll in order not to obstruct the movement path of the printing roll, . Further, the nipping portion may be moved upward so as to prevent a scratch on the lower surface of the film substrate. Accordingly, the roll printing apparatus according to the present application may include a driving unit for moving the nipping unit up and down.

The first print film supporting white roll or the second print film supporting white roll may be moved up and down so as not to obstruct the movement path of the printing roll or to prevent scratching on the bottom surface of the film substrate .

The nip portion may further include a secondary fixing portion so that the printed film can be stably provided. Preferably, the auxiliary fixing portion is provided between the winding portion and the nip portion.

The roll printing apparatus according to the present application may further include a position control unit for positioning the first print film supporting white roll or the second print film supporting white roll for aligning the print film. The position control portion of the first print film supporting white roll or the second print film supporting white roll may be connected to the first print film supporting white roll or the second print film supporting white roll. The position control section aligns the first print film supporting white roll or the second print film supporting white roll so that the print pattern is transferred to a suitable position on the film substrate by the printing roll before transferring the printing pattern onto the film substrate. I can do it. Also, as described above, the film base can be moved up and down through the position control unit of the first printable film supporting backroll or the second printable film supporting backroll, thereby preventing the progress of the printing roll And the occurrence of scratches on the lower surface of the film substrate can be prevented.

The roll printing apparatus according to the present application may further include a drying or curing unit provided between the first print film supporting white roll or the second print film supporting white roll and the winding unit. The drying or curing unit may dry or cure the printed pattern transferred onto the film substrate. The drying or curing unit may comprise control means to allow the substrate pattern to dry or cure under appropriate conditions. In the present application, since the substrate is in the form of a film, it is preferable that the drying or curing temperature is controlled depending on the film material.

The roll printing apparatus according to the present application further comprises a second unwinding portion provided between the first printed film supporting backroll or the second printed film supporting backroll and the winding portion and providing a film to be laminated together with the film base . The type of the film provided from the second winding portion is not particularly limited as long as it is required to form a laminate with the film base. For the lamination, the film substrate and the film provided from the second winding portion may further include a lapping means before being wound around the winding portion. For example, it may further include a pressing means. The pressing means may be provided through a structure composed of two rolls. Two films can be laminated by such pressing means.

It is preferable that the driving speed of the first print film supporting backroll or the second print film supporting white roll is synchronized with the driving speed of the printing roll transferring the printing pattern. In other words, the linear velocity driven by the first print film supporting white roll and the linear velocity driven by the first printing roll coincide with each other, and the linear velocity driven by the second print film supporting white roll, Are preferably matched with each other. By doing so, a precise pattern can be transferred. At this time, in calculating the driving speed of the first printing roll or the second printing roll, it is preferable to calculate based on the entire printing roll including the blanket.

The precision pattern can be transferred by controlling the pressure between the first print film supporting white roll and the first printing roll, or between the second printing film supporting white roll and the second printing roll.

The roll printing apparatus according to the present application may be provided with a driving motor for moving the first printing roll or the second printing roll in the direction of the pattern transferring portion on the conveyor while rotating the first printing roll or the second printing roll.

The drive motor may be a linear motor. However, the present invention is not limited to this, and it goes without saying that the present invention can be applied to any motor that can move forward in addition to servomotors and rock-pinion motors.

The roll printing apparatus according to the present application may be provided with a coater for coating ink on each of the first printing roll and the second printing roll.

As the coater, a slit coater or a roll coater may be used, but the present invention is not limited thereto.

The first print roll and the second print roll may be made of stainless steel for precision machining whose surface has been electrolytically polished.

As a specific example, a printing roll can be manufactured using an electrolytic polishing treatment of a surface of SUS304 stainless steel, SUS305 stainless steel, or SUS316 stainless steel. Surface treatment of the surface of stainless steel with metal elements such as nickel can prevent the corrosion and oxidation of stainless steel.

In the roll printing apparatus according to the present application, the diameters of the first printable film-supporting white roll and the second printable film-supporting white roll may be independently 10 to 1,000 mm, but are not limited thereto.

The diameters of the first printing roll and the second printing roll may independently be 300 to 3,000 mm, but are not limited thereto.

A blanket may be wound around the surfaces of the first and second printing rolls. In this case, ink is applied to the blanket during the coating process using the coater.

In the roll printing apparatus according to the present application, the contents of the ink composition and the like are the same as those known in the art, so a detailed description thereof will be omitted.

The roll printing apparatus according to the present application can be applied to reverse offset printing.

In the roll printing apparatus according to the present invention, two or more roll printing apparatuses are connected, and a printing process using two or more roll printing apparatuses can be continuously performed. At this time, a floating roll is provided between two or more roll printing apparatuses so that the film substrate can be continuously transported. An embodiment in which two or more roll printing devices are connected to a floating roll as described above is shown in Fig.

A roll printing apparatus according to the present application includes a color filter pattern; Semiconductors and conductors; A gate-gate insulating film using an insulator film, a manufacturing process of a thin film transistor (TFT) substrate constituting the active-passivation-pixel, and the like. Particularly, the roll printing apparatus according to the present application can be more effectively applied when manufacturing a metal mesh film for a touch panel.

The present application also provides a roll printing method using the roll printing apparatus.

One embodiment of the roll printing method according to the present application comprises the steps of: 1) preparing a conveyor equipped with a cliche and conveying the cliche; providing a first substrate to be printed with a film base, A first printing roll coated with a first ink is brought into contact with the cliche, and then the first printing roll is brought into contact with the first printed film supporting white roll, Printing the first ink on the film substrate; 3) bringing the second printing roll coated with the second ink into contact with the cliche while moving the first printing roll to the initial position; Printing the second ink on the film substrate by bringing the second printing roll into contact with the support roll, and 4) repeating the steps 1) to 3) sequentially while returning the second printing roll to the initial position And a step of performing.

In the roll printing method according to the present application, a means known in the art can be used as a means for withdrawing and feeding the cliche, the film substrate, etc. into the roll printing apparatus.

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

A roll printing apparatus according to one embodiment of the present application is shown in Fig.

As shown in FIG. 1, the roll printing apparatus according to the present invention includes a conveyor 40 having a cliche 60 and conveying the cliche 60; A pattern transfer section including a film substrate 10 and including a first print film supporting white roll 50 and a second print film supporting white roll 50 which successively provide and recover the film substrate 10; And a transfer member provided on the conveyor and adapted to contact the first print film supporting white roll and the second print film supporting white roll to transfer the pattern onto the film substrate, 1 printing roll 80 and a second printing roll 80.

According to the present application, by using a pair of printing roll devices, one printing roll can perform a printing process while the other printing roll can perform a printing process while returning after performing a printing process, so that the printing can be continuously performed. Therefore, the present invention can shorten the tack time by half compared with the prior art, thereby improving the productivity by four times or more. In this case, since the printed substrate and the substrate for the next printing can be efficiently replaced, the productivity can be improved.

Further, according to the present application, since the productivity can be improved, the installation area of the manufacturing apparatus can be reduced, and the number of movable personnel can be reduced. In addition, there is a feature that the investment cost can be reduced accordingly.

Claims (13)

A conveyor provided with a cliche and adapted to convey the cliche;
A pattern transfer unit including a film substrate and including a first print film supporting white roll and a second print film supporting white roll which successively provide and recover the film substrate; And
And a first printing roll and a second printing roll, which are provided on the conveyor and transfer the pattern onto the film substrate in contact with the first print film supporting white roll and the second print film supporting white roll, respectively,
Characterized in that the printing process is carried out at a contact point of 30 to 60 degrees with the first printing roll and the second printing roll, A roll printing apparatus for reverse offset printing. [4] The apparatus as claimed in claim 1, wherein the pattern transferring unit further comprises a printed film supplying unit for continuously supplying the film substrate and a printed film collecting unit for continuously recovering the film substrate. Roll printing device. The reverse offset printing method according to claim 2, wherein a reverse printing printing roll is provided between the print film supplying unit and the print film collecting unit, Printing device. The apparatus of claim 2, wherein the print film providing unit is an unwinder, and the print film collecting unit is a rewinder. delete delete delete delete delete delete The printing apparatus according to claim 1, wherein two or more roll printing apparatuses are connected,
Characterized in that a floating roll is provided between the at least two roll printing devices so that the film substrate is continuously conveyed. The roll printing apparatus according to claim 1, wherein the roll printing apparatus is for producing a metal mesh film for a touch panel. A roll printing method for reverse offset printing using the roll printing apparatus of any one of claims 1 to 4, 11,

Images