JP2006297644A - Screen and equipment and method for screen printing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve separation of a screen from a workpiece after a squeegee passes thereon, so-called snap-off of the screen, in regard to screen printing. <P>SOLUTION: The snap-off of the screen is improved by magnetizing the screen and the workpiece and by utilizing that the screen and the workpiece repel each other magnetically. The screen is generally thin and it is difficult to magnetize the obverse and the reverse of the surface of the screen with different poles. Therefore one side of the screen is magnetized with both poles. Accordingly, even the thin screen can be magnetized. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to separation of a screen printing apparatus using magnetic force.

In screen printing, a screen is set with a gap of several millimeters (mm) between the work to be printed and ink is supplied to the screen. Next, in screen printing, the squeegee holds the screen downward to extend the screen downward, and the squeegee moves while keeping the screen extended so that the work and the screen are brought into close contact with each other. In screen printing, the screen and the work come into contact with each other, and the ink supplied to the screen is transferred to the work, thereby performing printing. In the conventional screen printing, when printing is performed as described above, after the squeegee passes, the screen is separated from the work due to the tension of the screen or the like.
For example, conventionally, since the screen is separated from the work due to the tension of the screen, when the size in the screen frame is 320 mm, it is necessary to leave a gap of about 1.5 mm between the screen and the work to be printed. Conventionally, when the dimension in the screen frame is 1000 mm to 2500 mm or larger, it is necessary to leave a gap of 2 mm to 6 mm between the screen and the work to be printed. Or conventionally, it was necessary to leave a wider gap than the above.

Japanese Patent Application Laid-Open No. 2004-291366 discloses a method of repelling the screen and the work using magnetic force in order to reduce the gap between the screen and the work to be printed.
JP 2004-291366 A

Conventionally, there has been a problem that printing accuracy is lowered by printing with a wide gap between the screen and the workpiece and by greatly extending the screen. Conventionally, since printing is performed with the screen extended, there is a problem that the screen has to be enlarged for the purpose of improving printing accuracy. Further, conventionally, since the screen is extended, there is a problem that the life of the screen is shortened.
On the other hand, in the conventional method of repelling the screen and the workpiece using the magnetic force, when the screen is magnetized, the front and back of the screen are magnetized so as to have different magnetic poles. However, since the screen is thin, there is a problem that it is difficult to magnetize the screen so that the front and back of the screen have different magnetic poles.

  The screen according to the present invention includes a screen S pole portion in which a part of the screen surface which is one surface is magnetized to the S pole, and a screen N pole portion in which the other part of the screen surface is magnetized to the N pole. It is characterized by providing.

  Further, the screen is characterized by alternately having a screen S pole part and a screen N pole part with a predetermined width in a predetermined direction.

Furthermore, the screen printing apparatus according to the present invention is a screen printing apparatus comprising a screen mounting portion for attaching a screen and a table provided facing one surface of the screen attached to the screen mounting portion.
The table has a table S pole portion in which a part of the table surface, which is a surface facing the screen attached to the screen mounting portion, is magnetized to the S pole, and another part of the table surface is magnetized to the N pole. The table N pole part is provided.

  Furthermore, the screen printing apparatus further includes a screen attachment portion for attaching a screen, and a squeegee holder for attaching a squeegee that slides on the screen attached to the screen attachment portion. It comprises a squeegee magnet having a squeegee S pole portion magnetized to the S pole and a squeegee N pole portion magnetized to the N pole.

The screen printing method according to the present invention is a screen printing method for a screen printing apparatus comprising a screen mounting portion for mounting a screen and a table provided facing one surface of the screen mounted on the screen mounting portion. ,
Attaching a screen in which a part of the screen, which is a surface facing the table, is magnetized to the S pole and the other part of the screen is magnetized to the N pole is attached to the screen attaching portion; And a step of screen printing while exerting a force for separating the table and the table.

  According to the present invention, it is possible to magnetize even when the screen is thin. Therefore, by separating the screen from the conventional screen, it is possible to improve the separation of the screen using magnetic force.

  Hereinafter, the present invention will be described based on embodiments shown in the drawings.

FIG. 1 is a perspective view showing a screen printing apparatus.
FIG. 2 is a schematic side view of the screen printing apparatus.
FIG. 3 is a schematic plan view of the screen printing apparatus.

  In FIG. 1, 101 is a screen printing apparatus, 102 is a base of the screen printing apparatus, 103 is a movably mounted table, 104 is a guide rail for guiding the movement of the table, 105 is an operation box of the screen printing apparatus, 107 Is an operation switch attached to the operation box, and 109 is a printing unit that performs screen printing on a work placed on the table 103. 2 and 3, 110 is a work placed on the table 103, 200 is screen plate making, 201 is a screen frame of the screen plate making 200, 202 is a screen stretched on the screen plate making 200, 106 is a squeegee 111 and FIG. A slider 108, which holds a scraper (not shown) and slides in the directions of arrows A and D, is a screen plate attachment portion (screen attachment portion) to which the screen plate making 200 is attached and the slider 106 is slid.

  The table 103 is attached so as to be slidable left and right along a guide rail 104 attached to the base 102. When the table 103 moves below the printing unit 109, the table 103 is stopped by a stopper (not shown), and the printing unit 109 performs screen printing on the workpiece 110.

4 is a schematic cross-sectional view of the table 103 and the screen plate making 200 (cross-sectional view taken along the line XX in FIG. 3).
The squeegee 111 moves while pushing the screen 202 supplied with ink in the direction of the work 110, and the ink adheres to the work through the pattern holes formed in the screen, thereby performing screen printing on the work. Here, the part of the screen 202 through which the squeegee 111 has passed needs to be separated from the work 110.

  Conventionally, in order to separate the screen 202 from the workpiece 110, a method of lifting the screen plate-making 200 and physically separating it, a method of separating the screen by the tension of the screen against the screen frame, or the like has been used. Here, the screen 202 is separated from the workpiece 110 using magnetic force.

Embodiment 1 FIG.
First, the first embodiment will be described. In the first embodiment, a screen printing apparatus 101 that separates the screen 202 from the work 110 by magnetizing the screen 202 and the table 103 on which the work 110 is set will be described.

FIG. 5 is an enlarged view of the squeegee 111 portion of the screen printing apparatus 101 that separates the screen 202 from the work 110 by magnetizing the screen 202 and the table 103 on which the work 110 is set.
In FIG. 5, the screen 202 and the table 103 are magnetized with the same magnetic pole on their opposing surfaces, so that a force that separates the screen 202 and the table 103 acts. Therefore, after the squeegee 111 passes, a force that separates the screen 202 from the work 110 is exerted by the magnetic force.

However, since the screen 202 is made thin, it is difficult to magnetize the entire one surface to one pole and the other surface to a different pole.
Therefore, a part of the screen surface which is one surface of the screen 202 is magnetized to the S pole, and the other part of the screen surface is magnetized to the N pole. The other part is a part of the screen surface that is not magnetized to the S pole. Here, a portion magnetized in the S pole is referred to as a screen S pole portion 301, and a portion magnetized in the N pole is referred to as a screen N pole portion 302. The screen surface is a surface facing the workpiece 110, for example. The screen surface is not limited to this, and may be a surface opposite to the surface facing the workpiece 110.

FIG. 6 shows an example in which a part of the screen surface which is one surface of the screen 202 is magnetized to the S pole and the other part of the screen surface is magnetized to the N pole.
In FIG. 6, the screen S pole part 301 and the screen N pole part 302 are alternately arranged with a predetermined width in a predetermined direction. The predetermined direction is, for example, a direction parallel to the squeegee moving direction 250, which is the moving direction of the squeegee 111, or a direction perpendicular to the squeegee moving direction 250. The predetermined width is, for example, a width obtained by equally dividing the width of the screen 202 into an arbitrary width, or an arbitrary width between each screen S pole portion 301 and the screen N pole portion 302. In FIG. 6, the screen S pole portion 301 and the screen N pole portion 302 are alternately arranged in parallel with the moving direction 250 of the squeegee.

  The table surface, which is the surface of the table facing the magnetized screen surface, is magnetized to the same magnetic pole as the magnetic pole magnetized on the screen surface facing the table surface. By magnetizing the same magnetic pole, a force that separates the screen 202 and the table 103 acts. A portion magnetized on the S pole of the table surface is referred to as a table S pole portion 311, and a portion magnetized on the N pole of the table surface is referred to as a table N pole portion 312.

FIG. 7 shows another example in which a part of the screen surface, which is one surface of the screen 202, is magnetized to the S pole and the other part of the screen surface is magnetized to the N pole.
In FIG. 7, both ends of the screen surface are magnetized to the S pole, and the inside of the screen surface is magnetized to the N pole. The poles to be magnetized are not limited to this, and both ends of the screen surface may be magnetized to N poles and the inside of the screen surface may be magnetized to S poles. In FIG. 7, both ends are magnetized to the S pole with respect to the direction perpendicular to the squeegee moving direction 250, which is the moving direction of the squeegee 111. However, the term “both ends” is not limited thereto, and both ends can be magnetized to S poles in a direction parallel to the squeegee moving direction 250.

  The screen printing apparatus 101 and the screen printing method according to the first embodiment are summarized as follows.

In the screen printing apparatus 101 according to the first embodiment, for example, the screen 202 of the screen making plate 200 is arranged in parallel with the moving direction of the squeegee 111 so that N poles and S poles are alternately arranged with a certain width from one end of the screen 202. Magnetize.
Similarly, the table 103 arranged opposite to the screen 202 is also parallel to the moving direction of the squeegee 111 and has the same width as the N and S poles of the screen 202 from one end to the N pole of the screen 202. Are opposed so that the N pole and the S pole are alternately arranged so that the S pole faces the S pole.

  The screen printing method according to the first embodiment is a screen printing method in which screen printing is performed on the workpiece 110 using the screen plate making 200 and the table 103. The squeegee 111 slides on the screen 202 of the screen plate making 200. Then, when supplying the ink to the pattern holes of the screen and sliding on the screen 202 while pressing the screen 202 against the work 110 by the squeegee 111, one end of the screen 202 is parallel to the moving direction of the squeegee 111. The screen 202 magnetized so that N poles and S poles are alternately arranged with a certain width and the table 103 magnetized with the N and S poles facing each other repel each other, thereby repelling the screen. A push-up process for pushing up 202 is provided.

In other words, the screen printing method according to the embodiment includes a screen printing apparatus 101 including a screen mounting portion for mounting the screen 202 and a table 103 provided to face one surface of the screen 202 mounted on the screen mounting portion. In the screen printing method of
Arbitrary part of the screen surface, which is the surface facing the table 103, is magnetized to the S pole, and the screen 202 magnetized to any other part of the screen surface is the N pole. The process of attaching,
And a step of performing screen printing while applying a force to separate the screen 202 and the table 103 by the magnetic force magnetized on the screen 202 and the table 103.

Embodiment 2. FIG.
Next, a second embodiment will be described. In the second embodiment, the screen printing apparatus 101 that separates the screen 202 from the workpiece 110 by magnetizing the screen 202 and providing the squeegee holder 112 with the squeegee magnet 113 having magnetic force will be described.

FIG. 8 is an enlarged view of a portion of the squeegee 111 of the screen printing apparatus 101 in which the screen 202 is separated from the workpiece 110 by magnetizing the screen 202 and providing the squeegee holder 112 with a squeegee magnet 113 having magnetic force.
In FIG. 8, the screen 202 and the squeegee magnet 113 provided in the squeegee holder 112 are alternately magnetized with different magnetic poles, and the opposing portions have different magnetic poles. The squeegee magnet 113 acts to attract each other. Therefore, after the squeegee 111 passes, a force that separates the screen 202 from the work 110 is exerted by the magnetic force. Here, the squeegee magnet 113 only needs to be attached at least rearward in the moving direction of the squeegee 111. However, the present invention is not limited to this, and it is preferable to attach the front and rear as shown in FIG. The squeegee magnet 113 is, for example, a cylindrical magnet that can be attached to and detached from the squeegee holder 112. The squeegee magnet 113 is not limited to this. For example, the squeegee holder 112 can also serve as the squeegee magnet 113 by magnetizing the squeegee holder 112.

However, since the screen 202 is thin as in the first embodiment, it is difficult to magnetize one entire surface to one pole and the other surface to a different pole.
Therefore, as in the first embodiment, a part of the screen surface which is one surface of the screen 202 is magnetized to the S pole, and the other part of the screen surface is magnetized to the N pole. As in the first embodiment, the part magnetized in the S pole is the screen S pole part 301, and the part magnetized in the N pole is the screen N pole part 302.

FIG. 9 shows an example in which a part of the screen surface which is one surface of the screen 202 is magnetized to the S pole and the other part of the screen surface is magnetized to the N pole.
In FIG. 9, the screen S pole portion 301 and the screen N pole portion 302 are alternately arranged with a predetermined width in parallel with the squeegee moving direction 250 that is the moving direction of the squeegee 111. The arrangement direction is not limited to being parallel to the squeegee movement direction 250 and may be a direction perpendicular to the squeegee movement direction 250. The predetermined width is the same as that in the first embodiment.

  The squeegee magnet 113 facing the magnetized screen surface has a magnetic pole different from the magnetic pole magnetized on the facing screen surface. Here, a part of the squeegee magnet 113 having the magnetic force of the S pole is a squeegee S pole part, and a part of the squeegee magnet 113 having the magnetic force of the N pole is a squeegee N pole part. By giving the magnetic force of the magnetic pole different from the screen surface facing the squeegee magnet 113, the screen 202 and the squeegee magnet 113 have a force to attract each other.

  In the example of FIG. 9, the magnetic field is magnetized at a predetermined interval parallel to the squeegee moving direction 250, and thus has a magnetic force different from the magnetic pole magnetized on the screen surface facing the squeegee magnet 113 as described above. Thus, even if the squeegee 111 moves, the force that attracts the screen 202 and the squeegee magnet 113 always works.

  FIG. 10 shows an example in which S and N poles are alternately magnetized on the screen surface at a predetermined interval in a direction perpendicular to the squeegee moving direction 250 that is the moving direction of the squeegee 111. In this case, when the squeegee 111 moves, the magnetic poles of the opposing screen 202 change. Therefore, it is necessary to change the magnetic pole of the magnetic force to be given to the squeegee magnet 113 as the squeegee 111 moves. For example, it is conceivable to reverse the magnetic poles by using an electromagnet or the like for the squeegee magnet 113.

  In addition, as shown in FIG. 7, when both ends of the screen surface are magnetized to the S pole and the inside of the screen surface is magnetized to the N pole, for example, the screen N pole portion 302 magnetized to the N pole. It can be considered that only the range in which the squeegee 111 moves is included. That is, the entire range of movement of the squeegee 111 on the screen 202 is the N pole, and the outside of the range of movement of the squeegee 111 is the S pole. Since the range in which the squeegee 111 moves is all N-poles, even if the squeegee magnet 113 has all the S-pole magnetic force, even if the squeegee 111 moves, the force that always attracts the screen 202 and the squeegee magnet 113 is obtained. work. The magnetic poles magnetized on both ends and inside of the screen surface and the magnetic poles of the magnetic force imparted to the squeegee magnet 113 are not limited to the magnetic poles described above. The both ends of the screen surface may be both ends of the squeegee moving direction 250 with respect to the parallel direction or both ends with respect to the vertical direction. Furthermore, it is sufficient that the range in which the squeegee 111 moves is the same pole, and the portions having different poles may not be at both ends.

  In the second embodiment, the screen 202 has been described on the assumption that the portion facing the squeegee magnet 113 has different magnetic forces. However, in Embodiment 2, as long as the screen 202 is attracted by the magnetic force of the squeegee magnet 113, it does not need to have the magnetic force. The screen 202 may not have a magnetic force as long as it is attracted by the magnetic force of the squeegee magnet 113 such as high corrosion resistance stainless steel.

  The screen printing apparatus 101 and the screen printing method according to the second embodiment are summarized as follows.

The screen printing apparatus 101 according to the second embodiment magnetizes the screen 202 of the screen plate making 200 so that N poles and S poles are alternately arranged with a certain width from one end of the screen 202 in parallel with the moving direction of the squeegee 111. To do.
Further, the magnet provided in the squeegee holder 112 at the rear or front and rear of the squeegee 111 sliding on the screen 202 has a magnetic force opposite to the magnetic poles different from the N and S curves arranged alternately on the screen. It is characterized by.

  The screen 202, the table 103, and the squeegee holder 112 may be used by attaching a permanent magnet or the like instead of magnetizing the table 103 and the squeegee holder 112. Further, the squeegee holder 112 may be magnetized to give a magnetic force.

  In the screen printing method according to the second embodiment, N and S of the screen 202 magnetized so that N poles and S poles are alternately arranged with a certain width from one end of the screen 202 in parallel with the moving direction of the squeegee 111. A squeegee holder 112 having a magnet opposed to a magnetic pole different from the pole has a pulling-up action of pulling up the screen 202 by attracting each other.

  In the first embodiment and the second embodiment, it is possible to improve the separation of the screen 202 using magnetic force. Therefore, the gap between the screen 202 and the workpiece 110 can be reduced. Therefore, since the width of extending the screen can be reduced as compared with the conventional case, it is possible to solve the problem that the printing accuracy is lowered by extending the conventional screen for printing. Further, since printing is performed with the screen 202 extended, the problem that the screen 202 must be enlarged for the purpose of improving printing accuracy can be solved. Further, since the screen 202 is extended, the problem that the life of the screen 202 is shortened can be solved.

  That is, according to the screen 202 and the screen printing apparatus according to the first embodiment and the second embodiment, it is possible to improve the printing accuracy and reduce the production cost of the screen 202 because the screen 202 can be made small. The life of the screen 202 can be extended.

  It is also possible to combine the first embodiment and the second embodiment described above. Further, by implementing the first embodiment and the second embodiment together, the force for separating the screen 202 from the work 110 can be exerted more strongly.

  According to the present invention, for example, in a screen printing apparatus used for printing electrical wiring on a substrate or printing resist in etching, a conventional thin screen is used to improve screen separation by magnetic force. be able to.

It is a perspective view which shows a screen printing apparatus. It is a schematic side view of a screen printing apparatus. It is a schematic plan view of a screen printing apparatus. It is a cross-sectional schematic diagram (XX sectional view of FIG. 3) of the table 103 and the screen plate making 200. It is an enlarged view of a squeegee 111 portion of the screen printing apparatus 101 that separates the screen 202 from the work 110 by magnetizing the screen 202 and the table 103 on which the work 110 is set. This is an example in which a part of the screen surface which is one surface of the screen 202 is magnetized to the S pole and the other part of the screen surface is magnetized to the N pole. This is another example in which a part of the screen surface that is one surface of the screen 202 is magnetized to the S pole and the other part of the screen surface is magnetized to the N pole. 7 is an enlarged view of a squeegee 111 portion of the screen printing apparatus 101 that magnetizes the screen 202 and includes the squeegee magnet 113 having a magnetic force in the squeegee holder 112 to separate the screen 202 from the workpiece 110. FIG. This is an example in which a part of the screen surface which is one surface of the screen 202 is magnetized to the S pole and the other part of the screen surface is magnetized to the N pole. This is another example in which a part of the screen surface that is one surface of the screen 202 is magnetized to the S pole and the other part of the screen surface is magnetized to the N pole.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 101 Screen printing apparatus, 102 Screen printing apparatus base, 103 Table, 104 Guide rail, 105 Operation box, 106 Slider, 107 Operation switch, 108 Screen plate making attachment part, 109 Printing part, 110 Workpiece, 111 Squeegee, 112 Squeegee holder , 200 screen plate making, 201 screen frame, 202 screen, 301 screen S pole part, 302 screen N pole part, 311 table S pole part, 312 table N pole part, 321 squeegee S pole part, 322 squeegee N pole part.

Claims (5)

A screen S pole portion in which a part of the screen surface as one surface is magnetized to the S pole;
And a screen N pole portion in which another part of the screen surface is magnetized to an N pole.   The screen according to claim 1, wherein the screen has screen S-pole portions and screen N-pole portions alternately with a predetermined width in a predetermined direction. In a screen printing apparatus comprising a screen mounting portion for attaching a screen, and a table provided facing one surface of the screen attached to the screen mounting portion,
The table above
A table S pole portion obtained by magnetizing a part of the table surface, which is a surface facing the screen attached to the screen attachment portion, to the S pole;
A screen printing apparatus, comprising: a table N pole portion in which another part of the table surface is magnetized to an N pole. In a screen printing apparatus comprising a screen attachment portion for attaching a screen, and a squeegee holder for attaching a squeegee that slides on the screen attached to the screen attachment portion,
The squeegee holder is
A screen printing apparatus comprising: a squeegee magnet having a squeegee S pole portion partially magnetized to an S pole and another squeegee N pole portion magnetized to an N pole. In a screen printing method of a screen printing apparatus comprising a screen mounting portion for attaching a screen, and a table provided facing one surface of the screen attached to the screen mounting portion,
Attaching a screen having a part of the screen surface, which is a surface facing the table, magnetized to the S pole and the other part of the screen surface magnetized to the N pole to the screen attaching part;
A screen printing method comprising a step of screen printing while applying a force separating the screen and the table.

Images