JP2013056442A - Screen printer and screen printing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable highly accurate screen printing by preventing ink from leaking into a gap between a screen plate and a printed object.SOLUTION: A table angle adjusting mechanism (20) of the screen printer (1) maintains tension of a squeegee (50) onto the screen plate (40) constant according to the moving position of the squeegee (50), while the squeegee (50) is moving in a predetermined moving direction, pressing the screen plate (40) toward a workpiece (the printed object) (W), and adjusts the angle of a table (11) such that the workpiece (W) and the screen plate (40) are in close contact with each other on a side in the moving direction forward of the position where the squeegee (50) presses the screen plate (40), and the workpiece (W) and the screen plate (40) are separated from each other on a side in the moving direction behind the position where the squeegee (50) presses the screen plate (40).

Description

  The present invention relates to a screen printing apparatus and a screen printing method.

  Conventionally, screen printing has been adopted as a method for forming a fine circuit pattern. In screen printing, a clearance is provided between the screen plate and the printing material, and a predetermined pattern is printed on the surface of the printing material by pushing printing ink from above the screen plate with a squeegee. When the squeegee passes through the printing position, the screen plate and the substrate are separated from each other, and the plate separation is completed.

  In order to separate the screen plate from the printing material, it is necessary to apply a predetermined tension to the screen plate. However, in a structure in which a clearance is provided between the screen plate and the printing material, the tension applied to the screen plate differs depending on the position where the squeegee is pressed, which may adversely affect the printing position accuracy. On the other hand, a screen printing apparatus has been proposed in which the tension applied to the screen plate is made constant by changing the angle of the table on which the substrate is placed in accordance with the position where the squeegee is pressed (for example, Patent Document 1). reference).

JP 2004-322451 A

  However, when printing is performed with a clearance provided between the screen plate and the printing material, the printing ink leaks into the gap between the screen plate and the printing material on the front side in the traveling direction of the squeegee, and a predetermined pattern is formed. There is a possibility that it cannot be accurately transferred.

  The present invention has been made in view of the above points, and provides a screen printing apparatus and a screen printing method capable of performing high-precision screen printing by reducing ink leakage into the gap between the screen plate and the printing material. The purpose is to do.

  The screen printing apparatus of the present invention mounts a screen plate for printing a predetermined pattern on a printing material, a squeegee for pressing the screen plate against the printing material side to screen-print printing ink, and the printing material. And a table angle adjusting means for adjusting the angle of the table, wherein the table angle adjusting means presses the screen plate against the substrate side by the squeegee. The table angle is adjusted according to the movement position of the squeegee during the movement in the predetermined movement direction, and the squeegee presses the screen plate by adjusting the table angle by the table angle adjusting means. The screen plate is placed on the table on the front side in the moving direction from the position where it is located. The screen plate is in close contact with the printing material, and on the rear side in the moving direction from the position where the squeegee presses the screen plate, the screen plate is separated from the printing material placed on the table, and the squeegee It is characterized by keeping the tension on the screen plate constant.

  According to this screen printing apparatus, the table is adjusted to a predetermined angle by the table angle adjusting means, so that on the front side in the moving direction from the position where the squeegee presses the screen plate, Since the screen plate is in close contact, ink leakage from the gap between the screen plate and the substrate can be reduced. On the other hand, on the rear side in the moving direction from the position where the squeegee presses the screen plate, the printed material placed on the table and the screen plate are separated from each other, so that good plate separation can be realized. Further, the table angle adjusting means adjusts the angle of the table according to the position of the squeegee while the squeegee is moving by pressing the screen plate against the substrate in the predetermined movement direction, so that the screen plate of the squeegee is adjusted. Since the tension with respect to is kept constant, the displacement of the screen plate can be kept constant, and the printing accuracy can be improved.

  In the screen printing apparatus, it is preferable that the table angle adjusting unit adjusts the angle so that one end of the table on the movement start position side of the table moves away from the screen plate in accordance with the position of the squeegee. . In this case, since the tension on the screen plate of the squeegee can be kept constant by the configuration in which only one end of the table is moved, the printing accuracy can be improved without requiring a complicated configuration or a large mechanism. It becomes possible.

  Furthermore, in the screen printing apparatus, it is preferable that a pressing unit for pressing the screen plate against the table is provided on the front side in the moving direction of the squeegee. In this case, by providing the pressing means, the close contact state between the screen plate and the printing material can be ensured, so that ink leakage from the gap between the screen plate and the printing material can be further reduced. It becomes.

  Furthermore, in the screen printing apparatus, it is preferable that the screen plate and the entire surface of the printing material placed on the table are in close contact at the initial position of the table. In this case, by adjusting the table angle by the table angle adjusting means from the state in which the screen plate and the entire surface of the printing material are in close contact with each other, a peeling angle can be generated between the screen plate and the table. Realization of separation is possible.

  Furthermore, in the screen printing apparatus, it is preferable that the table is rotatably supported by a rotation shaft, and the rotation shaft is provided outside a printing range of the screen plate. In this case, the control for keeping the tension on the screen plate of the squeegee constant by rotating the table in the same rotation direction around the rotation axis throughout the printing process becomes simple.

  In the screen printing method of the present invention, the printing ink is applied to the printed material from an opening formed in the screen plate by pressing the screen plate against the printed material side with a squeegee that moves in a predetermined movement direction on the screen plate. A screen printing method for printing a predetermined pattern by extruding the squeegee while the squeegee presses the screen plate against the substrate and moves in the predetermined moving direction. Is kept constant, and the printing material placed on the table and the screen plate are in close contact with each other on the front side in the moving direction from the position where the squeegee presses the screen plate, and the squeegee is attached to the screen plate. It is placed on the table at the rear side of the moving direction from the position where it is pressed. Characterized in that said adjusting the angle of the substrate was placed table to the printing substrate and the screen plate is separated.

  According to this screen printing method, the angle of the table is adjusted while the squeegee presses the screen plate against the substrate to be moved and moves in a predetermined movement direction, so that the tension of the squeegee with respect to the screen plate is kept constant. Therefore, the amount of displacement of the screen plate can be kept constant and the printing accuracy can be improved. In addition, since the printed material and the screen plate are in close contact with each other in front of the position where the squeegee presses the screen plate, ink leakage from the gap between the screen plate and the printed material can be reduced. Furthermore, since the substrate to be printed is separated from the screen plate on the rear side in the moving direction from the position where the squeegee presses the screen plate, a good plate separation can be realized.

  According to the present invention, it is possible to perform screen printing with high accuracy by reducing ink leakage into the gap between the screen plate and the substrate.

It is a schematic diagram which shows the structure of the screen printing apparatus which concerns on this Embodiment. It is a figure which shows the movement of a squeegee and a table at the time of screen printing. It is a schematic diagram which shows the screen plate during screen printing. It is a figure for demonstrating the principle of the printing position shift resulting from plate opening. It is a figure for demonstrating the modification of a screen printing apparatus.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic diagram showing a configuration of a screen printing apparatus 1 according to an embodiment of the present invention. The screen printing apparatus 1 includes a base 10 and a table 11 disposed inside the base 10. The base 10 has, for example, a rectangular shape in which long sides are arranged in the depth direction of the paper shown in FIG. 1 when viewed from above, and an opening 10a having a rectangular shape is provided at the center thereof. In addition, the structure of the base 10 is not limited to such a shape, It can change suitably.

  The table 11 has, for example, a rectangular shape when viewed from above, and is disposed in the opening 10 a of the base 10. A flat table surface 11 a is formed on the upper surface of the table 11. A substrate (work) W to be screen-printed is placed on the table surface 11a. The table 11 can be moved up and down by a lifting mechanism equipped in the base 10 and can be transported in the depth direction of the paper shown in FIG. 1 by a transport mechanism installed in the base 10. The The table 11 is configured to be movable between the work loading / unloading area provided in the opening 10a of the base 10 and the printing execution area by the lifting mechanism and the conveyance mechanism.

  The table 11 is supported by the base 10 via a table angle adjusting mechanism 20 that constitutes a table angle adjusting means. The table angle adjustment mechanism 20 includes, for example, a control unit 20a that controls the entire mechanism, a motor 20b that is driven and controlled by the control unit 20a, and a rotary shaft 20c that rotates according to the driving force from the motor 20b. Consists of. The rotating shaft 20c is arrange | positioned in the upper end part vicinity of one inner wall surface which prescribes | regulates the opening part 10a of the base 10, for example. The rotating shaft 20c is disposed at least outside the printing range of the screen plate 40 on the workpiece W. The rotary shaft 20c is connected to the vicinity of the upper end of one end of the table 11 arranged in the print execution area, and supports the table 11 so as to be rotatable.

  The table angle adjusting mechanism 20 adjusts the angle of the table 11 by rotating the table 11 around the rotation axis 20c by the driving force from the motor 20b under the control of the control unit 20a. For example, the control unit 20 a controls the driving force from the motor 20 b based on information from various sensors provided in the screen printing apparatus 1 and adjusts the angle of the table 11. Examples of the sensor provided in the screen printing apparatus 1 include a position sensor that detects the position of a squeegee 50, a speed sensor that detects the moving speed of the squeegee 50, and an angle sensor that detects the angle of the table 11.

  A pair of screen plate holders 30 are provided on the upper surface of the base 10 with the opening 10a interposed therebetween. The pair of screen plate holders 30 holds the screen plate 40 so as to bridge the opening 10 a of the base 10. The screen plate 40 is manufactured, for example, by applying a photosensitive emulsion to a metal or resin woven in a mesh shape, and then exposing and developing a predetermined pattern to be printed to form openings in the emulsion. When the screen plate 40 is held by the screen plate holder 30, the lower surface thereof is disposed at the same position as the upper surface of the base 10.

  A squeegee 50 is disposed on the upper side of the screen plate 40 held by the screen plate holder 30. The squeegee 50 is held by a holder (squeegee holder) (not shown). The squeegee 50 (squeegee holder) is connected to a drive mechanism provided in the base 10 and can move in the direction of arrow A (moving direction A) while pressing the screen plate 40 against the table 11 (work W). It is configured. This drive mechanism includes a mechanism for moving the squeegee 50 in the vertical and horizontal directions necessary for moving the screen plate 40 while pressing it against the table 11 (work W).

  Having these configurations, the screen printing apparatus 1 performs screen printing on the workpiece W placed on the table surface 11 a of the table 11. In screen printing, the squeegee 50 moves in the moving direction A while pressing the screen plate 40 against the table 11 side, and pushes out printing ink from the opening formed in the screen plate 40, whereby a predetermined pattern is formed on the surface of the workpiece W. Is printed.

  In particular, in the screen printing apparatus 1, by setting the table 11 to a predetermined angle by the table angle adjusting mechanism 20, the screen plate 40 is moved forward in the moving direction A from the position where the squeegee 50 presses the screen plate 40. While closely contacting the workpiece W placed on the table 11, the screen plate 40 is separated from the workpiece W placed on the table 11 on the rear side in the moving direction A from the position where the squeegee 50 presses the screen plate 40. Further, while the squeegee 50 is moving in the predetermined movement direction by pressing the screen plate 40 toward the workpiece W from the movement start position to the movement end position, the table angle adjustment mechanism 20 causes the table 11 to be adjusted according to the position of the squeegee 50. The angle is adjusted to keep the tension of the squeegee 50 to the screen plate 40 constant.

  Hereinafter, the screen printing method in the screen printing apparatus 1 according to the present embodiment will be specifically described with reference to FIG. FIG. 2 is a diagram illustrating the movement of the squeegee 50 and the table 11 during screen printing. In FIG. 2, the table angle adjusting mechanism 20 is omitted. Hereinafter, for convenience of explanation, a range in which the work W is placed on the table surface 11a is referred to as a printing range. However, the printing range on the workpiece W is not limited to this range and can be changed as appropriate.

  Further, as shown in FIG. 1, a state where the table 11 is not angled by the table angle adjusting mechanism 20 is referred to as an initial state of the table 11. In the initial state of the table 11, the screen plate 40 is also in the initial state. The screen plate 40 in the initial state is fixed in close contact with the workpiece W on the table surface 11a. Moreover, in the initial state of the table 11, the upper surface of the table surface 11a and the upper surface of the base 10 are arrange | positioned on the substantially the same plane.

When screen printing is started from the initial state shown in FIG. 1, first, as shown in FIG. 2A, the squeegee 50 is positioned at a movement start position along the screen plate 40, and the screen plate 40 is pressed against the table 11 side. At this time, the table angle adjustment mechanism 20 adjusts the angle of the table 11 by rotating the table around the rotation axis 20c. Accordingly, the table 11 is in a state having a predetermined angle (table angle θ ₁ ) with respect to the initial state of the table 11. Since the screen plate 40 is pressed against the table 11 by the squeegee 50, the work W placed on the table 11 and the screen plate 40 are positioned in front of the moving direction A from the position where the squeegee 50 presses the screen plate 40. And adhere closely. When the workpiece W and the screen plate 40 are in close contact with each other, the screen expansion rate during printing can be suppressed as compared with the case where a clearance is provided between the workpiece W and the screen plate 40, so that the printing position deviation can be reduced. Further, on the rear side in the movement direction A from the position where the squeegee 50 presses the screen plate 40, the work W placed on the table 11 and the screen plate 40 are separated with a separation angle _θp1 . When the peeling angle θ _p1 is generated, a clearance is automatically created between the workpiece W and the screen plate 40, and the plate separation is performed well.

FIG. 2B shows a state in which the squeegee 50 has moved a predetermined distance in the movement direction A from the state shown in FIG. 2A. At this time, the table angle adjusting mechanism 20 adjusts the table angle θ ₂ of the table 11 so that θ ₂ > θ ₁ is satisfied. Since the screen plate 40 is pressed against the table 11 by the squeegee 50, the work W placed on the table 11 and the screen plate 40 are positioned in front of the moving direction A from the position where the squeegee 50 presses the screen plate 40. And adhere closely. Further, on the rear side in the movement direction A from the position where the squeegee 50 presses the screen plate 40, the workpiece W placed on the table 11 and the screen plate 40 have a peeling angle θ _p2 (θ _p2 > θ _p1 ). Separated in the state.

  The squeegee 50 further moves in the movement direction A from the state shown in FIG. 2B and moves to the movement end position at the right end of the work W in the drawing to complete the screen printing. In this case, since the rotation shaft 20c is provided outside the printing range, the table angle adjustment mechanism 20 rotates the table 11 in the same rotation direction around the rotation shaft 20c throughout the printing process, thereby The angle can be adjusted.

  The table angle adjustment mechanism 20 keeps the tension of the squeegee 50 to the screen plate 40 constant while the squeegee 50 moves from the movement start position to the movement end position while pressing the screen plate 40 against the table 11 side. The table angle θ of the table 11 is adjusted. By keeping the tension of the screen plate 40 constant, the amount of displacement of the screen plate 40 is kept constant, and the printing accuracy is improved. That is, when the screen plate 40 is pressed by the squeegee 50, the printing position deviation due to the expansion or contraction of the screen plate 40 is reduced, so that the printing accuracy can be improved.

  Here, a method of calculating the table angle θ adjusted by the table angle adjusting mechanism 20 will be described.

FIG. 3 is a schematic diagram showing the screen plate 40 during screen printing. In FIG. 3, “2l _i ” indicates the length of the screen plate 40 in the initial state. “L ₁ + l ₂ ” indicates the length of the screen plate 40 during printing. “Θ” indicates a table angle. “X _i ” indicates the length in the horizontal direction from the position where the squeegee 50 presses the screen plate 40 to the end of the printing range. “X” indicates the length of the screen plate 40 at the portion in close contact with the workpiece W. “Θ _p ” indicates the peel angle. _{"F s"} indicates the tension of the screen plate 40. _{"F p"} refers to the release force of the screen plate 40.

ここで、「β」は、印刷中スクリーン伸長率を示す。 In such a model, a constant tension condition is given as in equation (1).

Here, “β” indicates the screen expansion rate during printing.

Further, from FIG. 3, “l ₁ ” and “l ₂ ” are expressed by the following equations (2) and (3), respectively.

Here, in “l ₂ ”, the following equation (4) is established from the equations (1) and (2).

Then, the following equation (5) is established from the equations (3) and (4).

When formula (5) is expanded, cos θ can be obtained by the following formula (6).

On the other hand, the following equation (7) is established between “x _i ” and “x” from FIG. 3.

From Expression (7), “x” can be obtained by the following Expression (8).

Therefore, from the equations (6) and (8), cos θ can be obtained by the following equation (9).

Here, in Equation (9), “β” and “l _i ” are constants, and the variable is only “x _i ”. Therefore, the tension of the squeegee 50 with respect to the screen plate 40 is kept constant by adjusting the table angle θ so as to satisfy the expression (9) by the table angle adjusting mechanism 20 according to the value of the variable “x _i ”. Be drunk.

  As described above, the screen printing apparatus 1 adjusts the angle by the table angle adjusting mechanism 20 so that one end of the squeegee 50 on the table 11 moves away from the screen plate 40 on the movement start moving position side according to the position of the squeegee 50. Depending on the configuration, the tension of the squeegee 50 to the screen plate 40 can be kept constant. Therefore, it is possible to improve printing accuracy without requiring a complicated configuration or a large-scale mechanism. In particular, the table 11 is rotatably supported by a rotation shaft 20c, and the table angle adjustment mechanism 20 adjusts the table angle θ by rotating the table 11 in the same rotation direction around the rotation shaft 20c throughout the printing process. . Therefore, the tension of the squeegee 50 with respect to the screen plate 40 can be kept constant by simple control.

ここで、「ｋ_０」は、スクリーン版４０のバネ定数を示す。「ω_０」は、スキージ５０によって押圧されることによる初期状態からのスクリーン版４０の変位を示す。「ｌ_０」は、スクリーン印刷装置１に取り付ける前の無荷重時におけるスクリーン版４０の長さ（２ｌ_０）の半数を示す。 Subsequently, the tension “f _s ” of the screen plate 40 is expressed by the following equation (10).

Here, “k ₀ ” indicates the spring constant of the screen plate 40. “Ω ₀ ” indicates the displacement of the screen plate 40 from the initial state due to being pressed by the squeegee 50. “L ₀ ” indicates half of the length (2l ₀ ) of the screen plate 40 when there is no load before being attached to the screen printing apparatus 1.

“Δl _i / l _i ” in the first term on the right side of Expression (10) is expressed by the following Expression (11).

Thus, equation (10), the equation (11), the following equation for _{"f s"} (12) holds.

In Expression (12), “k ₀ ”, “l _i ”, “l ₀ ”, and “β” are constants, and the variable is only “ω ₀ ”. Therefore, if the variable “ω ₀ ” is always a constant value, “f _s ” is constant. Here, when the table angle θ is adjusted by the table angle adjusting mechanism 20 so as to satisfy Expression (9), “ω ₀ ” is always a constant value. From this, it can be confirmed that the tension “f _s ” of the screen plate 40 becomes constant by adjusting the table angle θ so as to satisfy the expression (9).

Further, the peeling strength of the screen plate 40 _{"f p"} is expressed by the following equation (13).

In _{"f p"} of the formula (13), equation (4), the equation (8), the following equation holds (14).

From Expression (14), the peeling force “f _p ” of the screen plate 40 changes according to the table angle θ and the variable “x _i ”.

  Next, the printing position shift caused by the plate opening will be described. FIG. 4 is a diagram for explaining the principle of misalignment of printing due to plate opening. The screen printing apparatus shown in FIG. 4 is an apparatus having a configuration different from that of the screen printing apparatus 1 according to the present embodiment, but the same reference numerals as those of the screen printing apparatus 1 are used for convenience of explanation.

  In the screen printing apparatus shown in FIG. 4, the screen plate 40 and the workpiece W are provided with a clearance 100. On the screen plate 40, a predetermined pattern to be printed is formed by partitioning with an emulsion 40a. When the screen plate 40 and the workpiece W have the clearance 100, when the clearance 100 is small, the opening height is substantially proportional to the opening width 102 in the emulsion opening 101 on the front side in the moving direction A of the squeegee 50. 103 changes. Since the ink pressure is high on the front side in the moving direction A of the squeegee 50, there is a possibility that ink leakage 104 may occur from the emulsion opening 101 having the opening height 103. When this ink leak 104 occurs, an error of the ink leak width occurs with respect to the emulsion outline. This is a print position shift caused by the plate opening.

  On the other hand, in the screen printing apparatus 1 according to the present embodiment, the screen plate 40 and the work W are in close contact with each other on the front side in the moving direction A from the position where the squeegee 50 presses the screen plate 40. No opening height is generated in the emulsion opening 101. Therefore, in the screen printing using the screen printing apparatus 1, ink leakage from the emulsion opening 101 can be reduced, so that the printing position deviation caused by the plate opening can be improved.

  FIG. 5 is a diagram for explaining a modification of the screen printing apparatus 1. As shown in FIG. 5, the screen printing apparatus 1 may include pressing means 60 for pressing the screen plate 40 against the workpiece W (table 11) on the front side in the moving direction A of the squeegee 50. As the pressing means 60, for example, a roller that moves while rotating on the screen plate 40 can be applied. By providing the pressing means 60, the screen plate 40 and the workpiece W can be more closely contacted, so that it is possible to further reduce the situation where ink leakage from the emulsion opening 101 in the screen plate 40 occurs. It becomes.

  Further, the screen printing apparatus 1 may include a roller for supplying ink instead of the squeegee 50. Or you may provide the squeegee 50 integrated with the ink supply means. In this case, it is not necessary to supply extra ink onto the screen plate 40, so that ink leakage from the emulsion opening 101 can be further reduced. Further, it is possible to eliminate waste of ink.

  As described above, in the screen printing apparatus 1 according to the present embodiment, while the squeegee 50 presses the screen plate 40 against the work W side and moves in the predetermined movement direction by the table angle adjusting mechanism 20. By adjusting the angle of the table 11, the work W placed on the table 11 and the screen plate 40 are in close contact with each other on the front side in the movement direction A from the position where the squeegee 50 presses the screen plate 40. Ink leakage from the gap generated between the screen plate 40 and the workpiece W can be reduced. Furthermore, since the work W placed on the table 11 and the screen plate 40 are separated from each other on the rear side in the moving direction A from the position where the squeegee 50 presses the screen plate 40, a separation angle is generated, so that good plate separation can be achieved. realizable. Further, by keeping the tension of the squeegee 50 with respect to the screen plate 40 constant, the amount of displacement of the screen plate 40 can be kept constant, and the printing accuracy can be improved. That is, the screen printing apparatus 1 enables high-accuracy screen printing with reduced ink leakage and good plate separation.

  In addition, this invention is not limited to the said embodiment, It can implement variously. In the above-described embodiment, the size, shape, and the like illustrated in the accompanying drawings are not limited thereto, and can be appropriately changed within a range in which the effect of the present invention is exhibited. In addition, various modifications can be made without departing from the scope of the object of the present invention.

  For example, in the said embodiment, the case where the rotating shaft 20c which supports the table 11 rotatably is demonstrated as the table angle adjustment mechanism 20. FIG. However, the configuration of the table angle adjusting mechanism 20 is not limited to this, and can be changed as appropriate. For example, on the premise that the angle of the table 11 can be adjusted in the same manner as in the above-described embodiment, the table angle adjustment is performed on the lifting device that is arranged in the lower region of the table 11 and configured to be able to lift and lower one end of the table 11. The mechanism 20 may be provided.

DESCRIPTION OF SYMBOLS 1 Screen printing apparatus 10 Base 10a Opening part 11 Table 11a Table surface 20 Table angle adjustment mechanism 20a Control part 20b Motor 20c Rotating shaft 30 Screen plate holder 40 Screen plate 40a Emulsion 50 Squeegee 60 Pressing means 100 Clearance 101 Emulsion opening 102 Opening Width 103 Opening height 104 Ink leakage W Workpiece

Claims (6)

A screen plate for printing a predetermined pattern on the substrate; a squeegee for pressing the screen plate against the substrate to screen-print printing ink; a table for placing the substrate; A screen printing apparatus comprising table angle adjusting means for adjusting the angle,
The table angle adjusting means adjusts the angle of the table according to the movement position of the squeegee while the squeegee presses the screen plate against the printing material side and moves in a predetermined movement direction.
By adjusting the angle of the table by the table angle adjusting means, the screen plate is in close contact with the printing material placed on the table on the front side in the movement direction from the position where the squeegee presses the screen plate. Then, on the rear side in the moving direction from the position where the squeegee presses the screen plate, the screen plate is separated from the printing material placed on the table, and the tension of the squeegee on the screen plate is made constant. A screen printing device characterized by keeping.   2. The screen according to claim 1, wherein the table angle adjusting means adjusts the angle so that one end of the table on the movement start position side of the table moves away from the screen plate in accordance with the position of the squeegee. Printing device.   3. The screen printing apparatus according to claim 1, further comprising a pressing unit configured to press the screen plate against the table on a front side in a moving direction of the squeegee.   4. The screen printing apparatus according to claim 1, wherein at the initial position of the table, the screen plate and the entire surface of the printing material placed on the table are in close contact with each other. 5.   The said table is rotatably supported by the rotating shaft, The said rotating shaft is provided out of the to-be-printed range of the said screen plate, The Claim 1 characterized by the above-mentioned. Screen printing equipment. By pressing the screen plate against the substrate side with a squeegee that moves in a predetermined direction on the screen plate, the printing ink is pushed out from the opening formed in the screen plate onto the substrate to print a predetermined pattern. A screen printing method for
While the squeegee presses the screen plate against the substrate and moves in the predetermined moving direction, the tension of the squeegee against the screen plate is kept constant, and the squeegee presses the screen plate. The printed material placed on the table and the screen plate are in close contact with each other on the front side in the moving direction from the position at which the squeegee is placed on the table on the rear side in the moving direction from the position at which the squeegee presses the screen plate. A screen printing method comprising adjusting an angle of a table on which the printed material is placed so that the printed material and the screen plate are separated from each other.

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