JP2001018367A - Apparatus for screen striking through and method for screen striking through using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a reduction in a using amount of an adhesive film and occurrence of a wrinkle of the film by providing a winding brake for stopping winding of the film at a winding roll. SOLUTION: A winding roll 13 of an adhesive film 11 to be drawn from an adhesive film roll 12 of a screen 21 is provided. A drawing brake portion 17 is provided at a shaft of the roll 12, and a winding brake portion 102 is provided at a shaft of the roll 13. After finishing printing, the brake of the portion 102 of the roll 13 is released, a support roll 15 and a drawing roll 14 are moved along a screen 21, and the film 11 is drawn. When the roll 14 is moved to a position of about a half of the screen 21, the brake of the roll 12 is released, and a brake of the portion 102 of the roll 13 is operated, thereby drawing the film 11 by the roll 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen back wiping apparatus for removing paste remaining on the back surface of a screen after a screen printing process, and a screen back wiping method using the same.

[0002]

2. Description of the Related Art Conventionally, when a desired pattern is printed on a substrate using a screen having a pattern having a plurality of openings, a screen printing method using a screen printing machine has been employed.

First, a conventional screen printer will be briefly described with reference to the drawings. FIG. 4 is a side view showing a configuration of a conventional screen printing machine. As shown in FIG. 4A, the screen printing machine includes a substrate 41 which is a printing object,
A printing table 32 on which the substrate 41 is placed, an opening (not shown) penetrating both sides as a pattern to be transferred to the substrate 41 are provided, and a plate-shaped screen 21 having elasticity is provided. A squeegee 31 for extruding the paste onto the surface of the substrate 41 and a screen 21
Scraper 32 for coating paste on the surface
And was composed of The print table 42 on which the substrate 41 is placed is installed below the screen 21, and above the screen 21, the tip of the squeegee 31 and the tip of the scraper 32 are spaced at a predetermined distance from the surface of the screen 21. Had been installed.

[0004] A printing method using the screen printing machine having such a configuration will be briefly described. As shown in FIG. 4A, the substrate 41 placed at a predetermined distance from the back surface of the screen 21 was placed on a printing table 42 and placed at a printing position, that is, immediately below the screen 21. The squeegee 31 is installed above the surface of the screen 21, and has a function of moving the squeegee 31 on the surface of the screen 21 while pressing the screen 21 against the substrate 41 from the surface side of the screen 21. At this time, the angle between the screen 21 and the squeegee 31 and the force that the squeegee 31 urges the screen 21 are:
The settings were adapted to the screen printing to be done.

As shown in FIG. 4B, the squeegee 31 moves along the surface of the screen 21, and paste (ink) provided on the screen 21 passes through the opening of the screen 21. Thereby, printing is performed on the surface of the substrate 41. The squeegee 31 that has reached the end of the screen 21 rises, that is, separates from the surface of the screen 21, and the scraper 32 moves its tip to the screen 2.
1 so as to come close to the surface. Then, FIG.
As shown in (c), the lowered scraper 32 moves along the surface of the screen 21 and uniformly coats the paste on the surface of the screen 21,
The occurrence of unevenness and the like in the next printing process was prevented.

However, screen printing using the above-described screen printing machine has a problem in that the paste adheres to the back surface of the screen through an opening provided in the screen. In addition, this screen printing
When applied to the above-mentioned substrate, there is a problem that the display characteristics of the PDP deteriorate due to clogging of the screen. In order to solve such a problem, a screen back wiping apparatus and a back wiping method using the same have been employed. Hereinafter, a screen back wiping apparatus and a back wiping method using the same will be briefly described with reference to the drawings.

FIG. 5 is a perspective view showing the structure of a conventional screen back wiping device. However, FIG. 5 schematically shows a conventional screen back wiping apparatus, and members irrelevant to the description are omitted. As shown in FIG. 5, the conventional screen back wiping apparatus 1 is installed in parallel with the screen plate 2 from the installation environment of another apparatus such as the above-described printing table. The screen plate 2 is composed of a screen 21 and a screen frame 22 provided on the periphery of the screen 21. A print screen 21a provided at a substantially central portion of the screen 21 is provided with a pattern to be transferred to a substrate. . A squeegee 31 and a scraper 32 are provided above the screen 21, and they are arranged along the inner edge of the screen frame 22.
And had the function of moving in the AA 'direction while urging the surface of the.

On the other hand, the screen back wiping device 1 is mainly constituted by a screen adhesive film roll 12 and a winding roll 13 for winding the adhesive film 11 drawn from the adhesive film roll 12. The pull-out braking unit 1 is mounted on the shaft 12a of the adhesive film roll 12.
7 is mounted on the shaft 13a of the take-up roll 13 so that the shaft 12a rotates only in a certain direction.
8a was provided. In addition, the adhesive film 1 pulled out from the adhesive film roll 12
1, an auxiliary roll 16 for holding the support roll 1, a support roll 15 movable along the back surface of the screen 21, and a drawer roll 14. The auxiliary roll 16 is fixed, and a fixing mechanism is provided so that the drawer roll 14 and the drivable support roll 15 can move along the back surface of the screen 21 integrally with each other. It is set so that it can be canceled.

Next, the operation of the screen back wiping apparatus will be described with reference to FIGS. FIG. 6 and FIG.
It is a side view which shows the outline of the operation | movement procedure of the conventional screen back wiping apparatus. As shown in FIG. 6, after the above-described screen printing is completed, a space is provided below the screen 21 so that the substrate and the printing table can move to the next process. The brake provided on the shaft 12a of the adhesive film roll 12 is applied in advance, and the shaft 1
The clutch provided in 3a functions so as not to rotate except in the direction in which the adhesive film 11 is wound. First, the brake of the shaft 12a of the adhesive film roll 12 is released, and the support roll 15 connected to the drawer roll 14 is released.
Moves in the AA ′ direction along the back surface of the screen 21. At this time, the pressure is applied to the adhesive film 11 by the brake of the shaft 12a of the adhesive film roll 12, and the adhesive film 11 is pulled out while maintaining a constant bending.

The drawer roll 14 and the support roll 1
When the adhesive film 11 is wound around the adhesive film 11 and reaches one end of the screen 21 located on the far side of the screen back wiping device (hereinafter referred to as a back wiping start position), the drawer roll 14
Then, the support roll 15 moves up to a position where it comes into contact with the back surface of the screen 21. After that, the squeegee 31 moves to a position symmetrical to the support roll 15 via the screen 21 and the adhesive film 11 so as to be in contact with the screen 21. Furthermore, the support roll 15 and the squeegee 31 start moving in the direction in which the auxiliary roll 16 is installed, that is, in the AA ′ direction, with the screen 21 and the adhesive film 11 sandwiched therebetween. Therefore, the adhesive film 11 is bonded to the back surface of the screen 21.

FIG. 6 is a view showing the operation procedure of the conventional screen wiping apparatus similar to FIG. 5, and is a view showing a continuation of the operation procedure of the screen back wiping apparatus described with reference to FIG. As shown in FIG.
After the squeegee 31 has adhered the adhesive film 11 to the back surface of the screen 21, the squeegee 31
1 away from the surface. Thereafter, the support roll 15 and the squeegee 31 move to the direction in which the drawer roll 14 is located, that is, the back wiping start position, and
5 and the drawer roll 14 are connected.

When the squeegee 31 and the support roll 15 reach the back wiping start position, the support roll 15 and the drawer roll 14 move in the direction in which the auxiliary roll 16 is installed. At the same time, the take-up roll 13 takes up the adhesive film 11, and the adhesive film 11 has been peeled off from the back surface of the screen 21 in the roll tangential direction of the drawer roll 14. Furthermore, drawer roll 1
When the support roll 15 and the support roll 15 reached the end of the screen 21, the drawer roll 14 and the support roll 15 were lowered, whereby the paste removing operation on the back surface of the screen 21 was completed.

[0013]

However, the conventional screen wiping apparatus has the following problems. In the conventional screen back wiping apparatus and the screen back wiping method using the same, since the drawing direction of the adhesive film is set to one direction, in the drawing operation of the adhesive film, the adhesive film is drawn out more than an actual necessary amount. There was a problem that was. Also, with the increase in the size of the substrate to be transferred, the size of the adhesive film to be used is also increased, so that a huge amount of static electricity is generated when the adhesive film is peeled from the drawer roll, and the generation of such static electricity causes a screen to be generated. Adhesive film was drawn to the back side of, and was stuck. Therefore, the surface of the pressure-sensitive adhesive film cannot be used in close contact with the back surface of the screen, and as a result, there has been a problem that the paste adhered to the back surface of the screen cannot be sufficiently removed.

The present invention has been made in view of the above-mentioned problems in the prior art, and reduces the amount of the pressure-sensitive adhesive film used, prevents wrinkling of the pressure-sensitive film as much as possible, and functions efficiently. It is an object to provide a screen back wiping apparatus and a screen back wiping method using the same.

[0015]

According to a first aspect of the present invention, there is provided a screen back wiping apparatus provided with a drawer braking portion for stopping the drawing of an adhesive film, provided on a take-up roll. It is characterized by.

Since the take-up roll is provided with a take-up braking portion for stopping the drawing of the pressure-sensitive adhesive film, it is possible to adjust the drawing and winding of the once-rolled pressure-sensitive adhesive film while maintaining a uniform tension. it can.
Therefore, it is possible to reliably remove the paste remaining on the back surface of the screen with about half the amount of the conventionally used adhesive film.

The screen back wiping device according to the second invention of the present application is characterized in that the winding braking unit is a brake mechanism having a motor.

Since the winding braking unit is a brake mechanism having a motor, the amount of the adhesive film to be drawn can be adjusted, and the amount of the adhesive film can be saved.

The screen back wiping device according to the third invention of the present application is characterized in that an electromagnetic brake is built in the drawer braking unit.

By incorporating the electromagnetic brake in the drawer braking section, the amount of the adhesive film to be pulled out can be adjusted, and the amount of the adhesive film can be saved.

The screen back wiping apparatus according to the fourth invention of the present application is characterized in that an electrostatic eliminator is provided near the side of the adhesive film roll from which the adhesive film is drawn.

By providing the static electricity eliminator near the side of the adhesive film roll from which the adhesive film is drawn, static electricity generated between the adhesive films can be removed, and as a result, the adhesive film can be uniformly placed on the back surface of the screen. You can put it.

In the screen back wiping device according to the fifth invention of the present application, the adhesive strength of the adhesive film is 200 g / 20 mm.
It is set within the range of ２５０250 g / 20 mm.

The adhesive strength of the adhesive film is 200 g / 20 m
By limiting the thickness within the range of m to 250 g / 20 mm, it is possible to prevent the adhesive film from peeling off from the rear surface of the screen due to its own weight, and to prevent damage to the rear surface of the screen caused by adhesive force.

In the method for wiping the back of a screen according to the sixth invention of the present application, when the support roll has reached a position substantially half the length of the screen, the pull-out braking portion provided on the adhesive film roll removes the adhesive film. It is characterized in that the stopping of the drawer is released, and the drawing of the pressure-sensitive adhesive film is stopped by the winding braking unit provided on the winding roll.

When the support roll has reached a position substantially halfway in the length direction of the screen, the stopping of pulling out of the adhesive film is released by the pull-out braking unit, and the winding of the adhesive film is stopped by the winding-up braking unit. Thereby, the amount of the adhesive film used for wiping the back of the screen can be reduced by about 40 to 60%.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a screen wiping apparatus according to the present invention and a method of wiping the screen back using the same will be described below in detail with reference to the drawings. However, FIG. 1 schematically shows a screen back wiping apparatus according to the present invention, and members irrelevant to the description are omitted. FIG. 1 is a perspective view showing a configuration of an embodiment of a screen back wiping apparatus according to the present invention. As shown in FIG. 1, the screen back wiping method according to the present invention comprises a screen back wiping device 1 for wiping the back of a screen, and a screen plate 2 to be wiped by the screen back wiping device.
And done by In screen printing, the screen back wiping device 1 is installed in parallel with the screen plate 2 from the installation environment of another device such as a printing table on which a substrate (not shown) to which a pattern is transferred is placed. . The screen plate 2 is composed of a screen 21 and a screen frame 22 provided on the periphery of the screen 21. A print screen 21a provided at a substantially central portion of the screen 21 is provided with a pattern to be transferred to a substrate. . A squeegee 31 and a scraper 3 having a function of moving up and down are provided above the screen 21.
2, which also had a function of moving in the AA ′ direction while urging the surface of the screen 21 along the inner edge of the screen frame 22. Further, at the tip of the squeegee 31, a solvent-resistant flat rubber having a rubber hardness of 60 to 80 degrees is provided.

The screen back wiping apparatus 1 is mainly constituted by a screen adhesive film roll 12 and a winding roll 13 for winding the adhesive film 11 drawn from the adhesive film roll 12. The pull-out braking unit 1 is mounted on the shaft 12a of the adhesive film roll 12.
7 is provided, and a winding braking unit 102 is provided on a shaft 13 a of the winding roll 13. The take-up braking unit 102 is a brake mechanism with a built-in motor, and the draw-out braking unit 17 has a built-in electromagnetic brake 101. In addition, an auxiliary roll 16 for holding the adhesive film 11 pulled out from the adhesive film roll 12, a support roll 15 movable along the back surface of the screen 21, and a drawer roll 14 are provided. Also,
The auxiliary roll 16 is fixed, and the drawer roll 14 is fixed.
A fixing mechanism is provided so that the support roll 15 and the drivable support roll 15 can move together along the back surface of the screen 21, and the fixing mechanism is set so that it can be released. Further, an electrostatic eliminator 103 is provided near the side of the adhesive film roll 12 from which the adhesive film 11 is drawn. Here, the adhesive force of the adhesive film 11 is 200 g / 20 mm to 250 g / 20.
mm. This indicates the adhesive strength when a 20 mm wide adhesive film is applied and the adhesive film is peeled off.

Next, the operation of the screen back wiping apparatus of the present invention will be described with reference to FIGS. However, since FIG. 2 and FIG. 3 show the outline of the operation of the screen back wiping device according to the present invention, members not involved in the description are omitted. 2 and 3 are diagrams showing an operation procedure in one embodiment of the screen back wiping device according to the present invention. As shown in FIG. 2A, when the printing table (not shown) is moved from the lower part of the screen 21 after printing and the space below the screen 21 is vacant, the winding braking unit 102 of the winding roll 13 The brake is released,
The support roll 15 starts moving along the screen 21. At this time, the drawer roll 14 is connected to the support roll 15, and is drawn out so that the adhesive film 11 is attached to the screen 21.

Thereafter, when the drawer roll 14 reaches about half the position of the screen 21, the brake of the adhesive film roll 12 is released. Next, the adhesive film 11 is pulled out from the adhesive film roll 12 after the brake is switched by operating the brake of the winding braking unit 102 of the winding roll 13.

The drawer roll 14 is driven along the back surface of the screen 21. Thereby, the adhesive film 11 is pulled out to the back surface of the screen 21. Also,
The brake is provided on the shaft 13a of the take-up roll 13 and the shaft 12a of the adhesive film roll 12, so that the adhesive film 11 is pulled out while being kept in tension and maintaining a constant deflection.

Next, the adhesive film 11 is folded back by the draw-out roll 14 and wound up by the take-up roll 13. Accordingly, a space is formed below the screen 21 between the outward path and the return path of the adhesive film 11. Since the adhesive film 11 is made of an insulating material, the sandwiched space forms a capacitor, and static electricity generated when the adhesive film 11 is peeled off from the adhesive film roll 12 is accumulated in the sandwiched space, and the static electricity of the adhesive film 11 is reduced. Reaches 1000 V to 3000 V.

Due to the generation of the static electricity, the adhesive film 11
Is attracted to and adhered to the back surface of the screen 21, and as shown in FIG.
During the period from the start of the withdrawal until the winding is completed, the static eliminator 103 is operated to neutralize and remove the generated static electricity.

Next, as shown in FIG. 2C, the drawer roll 14 and the support roll 15 are raised to a position where they come into contact with the back surface of the screen 21, and the support roll 15 is moved to the back wiping start position where the squeegee 31 is installed. Drive up to.
The squeegee 31 moves so as to be in contact with the screen 21, and the tip of the squeegee 31 is located at a position advanced by 2 to 3 mm from the center of the support roll 15.

Next, as shown in FIG. 2D, the support roll 15 and the squeegee 31 move in the direction in which the auxiliary roll 16 is installed with the screen 21 and the adhesive film 11 sandwiched therebetween. When the squeegee 31 starts moving, the rubber provided at the tip of the squeegee 31 bends and the tip moves rearward, and coincides with the center of the support roll 15.
Therefore, the adhesive film is stuck on the back surface of the screen 21 without wrinkling.

Further, as shown in FIG. 3A, the support roll 15 and the squeegee 31 move to a position where the bonding of the adhesive film 11 is completed. FIG. 3 (b)
When the support roll 15 and the squeegee 31 move to the position where the bonding of the adhesive film 11 is completed, the squeegee 31 rises and starts moving to the back wiping start position, as shown in FIG.

When the squeegee 31 and the support roll 15 return to the back wiping start position, as shown in FIG.
4 starts moving in the direction in which the auxiliary roll 16 is installed. At the same time, the brake of the take-up roll 13 is released, and the adhesive film 11 is taken up. At this time, the brake of the rotation axis of the adhesive film roll 12 is not rotated as the maximum,
The adhesive film 11 is uniformly peeled off from the back surface of the screen 21 in the roll tangent direction of the drawer roll 14.

Next, as shown in FIG. 3 (d), after the movement of the drawer roll 14 and the support roll 15, the drawer roll 14 and the support roll 15 return to the initial setting positions, and the static eliminator 103 stops operating. I do. By the operation described above, the paste remaining on the back surface of the screen 21 is transferred to the adhesive film 11 and removed.

[0039]

As described above, according to the screen back wiping apparatus and the screen back wiping method using the same according to the present invention, the adhesive uncoated portion is reused by using the brake device to reuse the unpasted portion. The amount used is 40
% To 60%. Also, by efficiently removing static electricity generated on the adhesive film, even if the width of the adhesive film becomes large due to the enlargement of the substrate and the screen, the back surface of the screen is uniformly and reliably not affected by the static electricity. Can be cleaned. Further, the adhesive strength of the adhesive film is set to 200 g / 20 mm to 250 g / 2.
By setting the thickness within the range of 0 mm, the remaining paste can be removed without damaging the back surface of the screen.

[0040]

[Brief description of the drawings]

FIG. 1 is a perspective view showing the configuration of a screen back wiping device according to the present invention.

FIG. 2 is a side view showing an operation procedure of a screen back wiping method using the screen back wiping apparatus according to the present invention.

FIG. 3 is a side view showing an operation procedure of a screen back wiping method using the screen back wiping apparatus according to the present invention.

FIG. 4 is a side view showing the configuration and operation of a conventional screen printing apparatus.

FIG. 5 is a perspective view illustrating a configuration of a conventional screen back wiping device.

FIG. 6 is a side view showing an operation procedure of a screen back wiping method using a conventional screen back wiping device.

FIG. 7 is a side view showing an operation procedure of a screen back wiping method using a conventional screen back wiping device.

[Explanation of symbols]

 1. Screen wiping device 2. Screen plate making 11. Adhesive film 12. Adhesive film roll 13. Take-up roll 14. Drawer roll 15. Support roll 16. Auxiliary roll 17. Pull-out braking section 18. Motor 21. Screen 22. Screen frame 31. Squeegee 32. Scraper 41. Substrate 42. Printing table 101. Electromagnetic brake 102. Rewind braking section 103. Static eliminator

Claims (6)

[Claims] 1. An adhesive film roll having an adhesive film for removing a paste remaining on a back surface of a screen, the adhesive film being wound around the adhesive film, and a pull-out control unit being provided, and an adhesive film pulled out from the adhesive film roll. A take-up roll for winding the film, a drawer roll for winding the adhesive film and moving along the back surface of the screen, and holding the screen together with a squeegee installed near the surface of the screen to urge the surface of the screen A screen back wiping device comprising a support roll moving on the back surface of the screen while a winding braking unit for stopping winding of the adhesive film is provided on the winding roll. 2. The screen back wiping device according to claim 1, wherein the winding braking unit is a brake mechanism having a motor. 3. The screen back wiping device according to claim 1, wherein an electromagnetic brake is built in the draw-out braking section. 4. The screen back-wiping device according to claim 1, wherein an electrostatic eliminator is provided near the side of the adhesive film roll from which the adhesive film is drawn. 5. The adhesive film has an adhesive strength of 200 g /
The screen back wiping device according to claim 1, wherein the setting is made within a range of 20 mm to 250 g / 20 mm. 6. After the screen printing step, the pressure-sensitive adhesive film wound on the pressure-sensitive adhesive film roll and the take-up roll is moved along the back surface of the screen while winding the pressure-sensitive adhesive film, and the surface of the screen is moved. In the screen back wiping method of removing the paste remaining on the back surface of the screen, the support roll moves on the back surface of the screen while sandwiching the screen with the squeegee installed in the vicinity, and the winding roll winds the adhesive film, When the support roll reaches almost halfway in the direction the support roll moves on the screen,
A method of wiping the screen back, characterized in that the stopping of the drawing out of the adhesive film is released by a draw-out braking unit provided on the adhesive film roll, and the drawing-out of the adhesive film is stopped by a winding-up braking unit provided on the winding roll.