JP2018001518A - Screen printer and screen printing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screen printer capable of applying high definition screen printing onto a sheet-like object to be printed while achieving downsizing and reduction in manufacturing cost.SOLUTION: A screen printer comprises a stage 5 for holding a base material 11 so as to overlap a holding surface 12, a screen printing plate 17 stretched in a flat state, and a squeegee 14 for transferring an ink 36 fed onto a top face of the screen printing plate 17 to the base material 11. The holding surface 12 is formed by a convexly curved surface curved in a moving direction of the squeegee 14. The stage 5 swings in a direction opposite to the moving direction of the squeegee 14 in accordance with the position of the squeegee 14 in a state where the base material 11 is in contact with a lower surface of the screen printing plate 17, and moves parallely in the moving direction of the squeegee 14.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a screen printing machine in which a printing surface is curved so as to be a convex curved surface, and a screen printing method performed by the screen printing machine.

2. Description of the Related Art Conventionally, some screen printing machines perform printing in a curved state so that the printing surface is a convex curved surface so that the screen plate is quickly separated from the printing material after printing.
Examples of this type of conventional screen printing machine include those described in FIG. 10 of Patent Document 1 and Patent Document 2.

  The screen printing machine disclosed in Patent Document 1 is a so-called cylinder type screen printing machine, and includes a printing cylinder that supports an object to be printed during printing. The substrate is a long base film that is long in the moving direction of the squeegee. The printing cylinder translates in the same direction as the squeegee while rolling along the substrate film.

  According to the screen printing machine shown in Patent Document 1, a printed material drawn out from a rolled state is sandwiched between a printing cylinder and a screen plate and wound around the outer peripheral surface of the printing cylinder. In this state, screen printing is performed on the substrate. In this screen printing machine, unlike the flat type screen printing machine in which the printing material is printed in a flat state, it is not necessary to consider the clearance between the printing material and the screen plate and the separation of the printing plate. For this reason, the cylinder type screen printing machine is less likely to cause elongation, blurring, or blurring of the printed image as compared to the flat type screen printing machine.

  The screen printing machine disclosed in FIG. 10 of Patent Document 2 also uses a cylinder. This cylinder is a blanket cylinder onto which ink is transferred. In the screen printer shown in Patent Document 2, first, screen printing is performed from a screen plate onto a blanket cylinder, and an ink pattern formed on the blanket cylinder is transferred to a printing material.

JP, 2006-5898, A International Publication No. WO 2014/050560

  However, in the screen printing machine shown in Patent Document 1, there is a problem that only the base material wound in a roll shape can be used as the printing material, and the sheet-like printing material cannot be used.

  In the screen printing machine disclosed in FIG. 10 of Patent Document 2, screen printing is performed on a printing material via a blanket cylinder, so that printing pressure must be applied during printing, and the print pattern may be crushed. In addition, since the configuration of the blanket cylinder is indispensable for this screen printing machine, the configuration of the printing machine becomes complicated, the printing machine becomes larger, and the manufacturing cost is increased.

  The present invention has been made to solve such a problem. A screen printer and a screen capable of performing high-definition screen printing on a sheet-like printed material while reducing the size and manufacturing cost. An object is to provide a printing method.

  In order to achieve this object, a screen printing machine according to the present invention is provided with a stage for holding a substrate, which is a substrate to be printed, on a holding surface, and a pattern hole made of a printing pattern, and the substrate on the stage. A screen plate placed on the opposite side of the stage and stretched in a flat state, and moves along the screen plate in contact with the substrate through the screen plate, and one of the screen plates A squeegee for transferring the ink supplied to the surface to the substrate, the holding surface is formed by a convex curved surface that curves in the moving direction of the squeegee, and the stage is formed on the other surface of the screen plate on the substrate While in contact with the squeegee, it swings in the direction opposite to the moving direction of the squeegee and moves parallel to the moving direction of the squeegee.

  In the screen printing machine according to the present invention, the screen plate and the substrate held on the stage may be capable of contacting and separating from each other.

  The screen printing method according to the present invention includes a substrate holding step for holding a substrate that is a substrate to be printed on a holding surface that is a convex curved surface of the stage, and a flat state at a position spaced from the substrate on the stage. An ink supply step for forming an ink film on the screen plate with a scraper, and a transfer operation in which the squeegee moves along the screen plate in contact with the substrate through the screen plate, while the stage moves in the moving direction of the squeegee And a printing step of oscillating in the opposite direction and moving parallel to the moving direction of the squeegee.

  According to the present invention, the screen plate can be pressed by the squeegee onto the portion of the printing surface of the base material held on the holding surface of the stage that is closest to the screen plate. Then, the stage swings and moves in parallel with the position of the moving squeegee, so that screen printing is performed on the entire printing surface. The printed portion of the base material moves in a direction away from the screen plate by the swing of the stage and quickly leaves the screen plate, so that the plate separation is good. Further, in this screen printing machine, printing is performed by a stage, a screen plate, and a squeegee, so that the size and the manufacturing cost can be reduced as compared with a screen printing machine having a blanket cylinder.

 Therefore, according to the present invention, it is possible to provide a screen printing machine and a screen printing method capable of performing high-definition screen printing on a sheet-like printed material while reducing the size and manufacturing cost. That is, according to the screen printing machine and the screen printing method according to the present invention, the clearance between the base material and the screen plate and the separation of the plate are taken into consideration for a single base material without using a blanket cylinder. Screen printing can be done without having to.

It is a side view which shows the structure of the screen printer which concerns on this invention. It is a schematic diagram which shows the state at the time of ink supply. It is a schematic diagram which shows the state at the time of a printing start. It is a schematic diagram which shows the state which the squeegee is located in the center part of the printing surface after the printing start. It is a schematic diagram which shows the state at the time of completion | finish of printing. It is sectional drawing which expands and shows a part of a stage, a base material, and a squeegee. It is a block diagram which shows the structure of a control system. It is a flowchart for demonstrating the screen printing method.

Hereinafter, an embodiment of a screen printing machine according to the present invention will be described in detail with reference to FIGS.
A screen printing machine 1 shown in FIG. 1 includes a base material support unit 3 positioned on a base 2 and at a relatively low position, and a printing unit 4 positioned on the base material support unit 3. ing. In this embodiment, the left side in FIG. 1 will be described as the rear side of the screen printing machine 1, and the right side in FIG. In this embodiment, the direction perpendicular to the paper surface of FIG. 1 (the front-rear direction and the direction perpendicular to the up-down direction) will be described as the left-right direction of the screen printing machine 1.

The substrate support unit 3 includes a stage 5 depicted in the center of FIG. 1, a swing device 6 that swings the stage 5 in the front-rear direction of the screen printing machine 1, and a swing device including the stage 5. And a first parallel movement device 7 for moving 6 in the front-rear direction. The stage 5 swings in the front-rear direction about the support shaft 8.
The stage 5 is for holding the base material 11 (see FIG. 6) as a substrate. On the upper surface of the stage 5, as shown in FIG. 6, a holding surface 12 for holding the base material 11 in an overlapping manner is formed, and a number of suction holes 13 are opened. The holding surface 12 is a convex curved surface that is curved so as to protrude upward, and is formed in a quadrangular shape that extends in the front-rear direction and the left-right direction when viewed from above.

  This convex curved surface is a uniaxial direction consisting of the front-rear direction of the screen printing machine 1 and is curved in the front-rear direction (moving direction of the squeegee 14 described later). For this reason, the height of the holding surface 12 gradually increases from the rear end of the holding surface 12 toward the intermediate portion in the state where the stage 5 is held horizontally as shown in FIG. It gets lower gradually as you go. The center of the arc constituting the convex curved surface according to this embodiment is located below the support shaft 8. Here, the arc refers to a line that becomes the upper edge (holding surface 12) of the stage 5 when the stage 5 is viewed from the left-right direction.

  The suction hole 13 is connected to a suction device 15 (see FIG. 7), and sucks air in a state where the base material 11 is superimposed on the holding surface 12. For this reason, the base material 11 is attracted and held by the holding surface 12 and bends following the holding surface 12. The operation of the suction device 15 is controlled by the control device 16. As the base material 11, a board material for forming a circuit board having flexibility in the form of a film or a sheet can be used. The base material 11 is superimposed on the holding surface 12 with the printing surface 11a pointing upward, and is held on the holding surface 12 in a curved state so as to be convex upward. The highest part of the printing surface 11a comes into contact with a screen plate 17 described later.

  The oscillating device 6 includes a support shaft 8 that is the center of oscillation of the stage 5 and an actuator 21 that applies a rotational force to the stage 5 clockwise or counterclockwise about the support shaft 8. The support shaft 8 is supported by the actuator 21 with its axis extending in the left-right direction of the screen printing machine 1. Although not shown in detail, the actuator 21 uses, for example, a segment gear fixed to the stage 5 and a first servo motor 22 (see FIG. 7) that drives a pinion meshed with the segment gear. Can be configured.

The actuator 21 according to this embodiment is configured such that the stage 5 swings at a predetermined angular velocity.
As shown in FIG. 2, the stage 5 has a printing start position that oscillates forward as shown in FIG. 2, and a printing end position that oscillates backward as shown in FIG. Swing between.
The operation of the first servo motor 22 is controlled by the control device 16.

  As shown in FIG. 1, the first parallel movement device 7 includes a first slide mechanism 23 that supports the actuator 21 movably in the front-rear direction, and a ball screw type first drive that drives the actuator 21 in the front-rear direction. 1 drive device 24 and the like. The first slide mechanism 23 is attached to the lower end portion of the actuator 21 by being supported by a plurality of first slide rails 25 supported by the base 2 and these first slide rails 25 so as to be movable in the front-rear direction. The slider 26 is formed.

The first driving device 24 includes a ball screw shaft 27 that is rotatably supported by the base 2 and extends in the front-rear direction, and a ball screw that is fixed to the lower end portion of the actuator 21 while being screwed to the ball screw shaft 27. A nut 28, a second servo motor 29 for driving the ball screw shaft 27, and the like are provided. The operation of the second servo motor 29 is controlled by the control device 16.
The stage 5 moves in the front-rear direction when the first driving device 24 operates. At the time of printing, as shown in FIG. 2, it moves from the print start position located on the rear side to the print end position located on the front side as shown in FIG.

The movement of the stage 5 at the time of printing is performed in synchronization with the swing of the stage 5 described above. Specifically, the first driving device 24 moves the stage 5 forward so that the printing surface 11a of the base material 11 held on the stage 5 rolls without slipping while contacting the lower surface of the screen plate 17. .
The swing of the stage 5 and the forward parallel movement are performed in accordance with the forward parallel movement of the squeegee 14 described later. That is, the stage 5 swings in the direction opposite to the moving direction of the squeegee 14 in accordance with the position of the squeegee 14 and moves parallel to the moving direction of the squeegee 14.

As shown in FIG. 1, the printing unit 4 includes a screen plate 17 positioned on the stage 5, a scraper 31 and a squeegee 14 positioned above the screen plate 17, and the scraper 31 and the squeegee 14 in the horizontal direction. The second parallel movement device 32 that is driven to the right and the frame 33 that supports these members and devices.
The screen plate 17 is formed of a flexible thin plate, and is provided with a pattern hole 34 (see FIG. 6) made of a printing pattern. The screen plate 17 is held by a frame member 35 that surrounds the periphery of the screen plate 17 and stretched in a flat state, and is supported by a frame 33 described later via the frame member 35.

The scraper 31 is for spreading the ink 36 (see FIG. 2) on the upper surface of the screen plate 17. In this embodiment, the upper surface of the screen plate 17 corresponds to “one surface of the screen plate” in the present invention. As the ink 36, a conductive paste for forming a circuit can be used. The scraper 31 according to this embodiment is supported by a first beam 37 extending in the left-right direction above the screen plate 17 via a first lifting device 38.
The first beam 37 is formed to have a length protruding in the left-right direction from the screen plate 17. Support plates 39 extending in the up-down direction and the front-rear direction are fixed to both ends in the left-right direction of the first beam 37. In FIG. 1, only one support plate 39 is depicted. The first beam 37 and the support plate 39 constitute a part of a second translation device 32 described later.

The first lifting / lowering device 38 that supports the scraper 31 includes a first air cylinder 41 (see FIG. 7). The first air cylinder 41 has a function of moving the scraper 31 up and down between two positions in the vertical direction described later. These positions are, as indicated by a two-dot chain line in FIG. 2, a retreat position where a wide space for printing is formed between the scraper 31 and the screen plate 17, and as indicated by a solid line in FIG. This is the application position when the ink 36 is applied to the screen plate 17.
The operation of the first air cylinder 41 is controlled by the control device 16.
The scraper 31 is attached to the first lifting / lowering device 38 so as to be detachable and to change the inclination angle in the left-right direction.

  The squeegee 14 is used for screen printing, and is supported on the first beam 37 described above via the second lifting device 42. The second lifting device 42 has a second air cylinder 43 (see FIG. 7). The second air cylinder 43 has a function of moving the squeegee 14 up and down between two positions in the vertical direction described later. These positions are a retracted position spaced upward from the screen plate 17 as indicated by a two-dot chain line in FIG. 3 and a printing position in contact with the screen plate 17 as indicated by a solid line in FIG.

By positioning the squeegee 14 at the printing position, the screen plate 17 is pressed against the printing surface 11 a of the base material 11 by the squeegee 14 from above with the pressing force of the second air cylinder 43. The operation of the second air cylinder 43 is controlled by the control device 16. The magnitude of the pressing force when the squeegee 14 presses the screen plate 17 against the substrate 11 is controlled by changing the pressure of the compressed air supplied to the second air cylinder 43.
The squeegee 14 is formed in a plate shape by an elastic material such as rubber, and is attached to the second lifting / lowering device 42 so as to be detachable and to change the mounting angle in the left-right direction and the front-back direction. Yes.

  As shown in FIG. 1, the second translation device 32 is configured to support the pair of support plates 39 movably in the front-rear direction, and to drive the support plates 39 in the front-rear direction. A ball screw type second driving device 45 is provided. The second slide mechanism 44 includes a pair of left and right second slide rails 46 supported by a frame 33 described later, and a lower end of a support plate 39 supported by the second slide rails 46 so as to be movable in the front-rear direction. The slider 47 is attached to the section. The first beam 37 described above is attached to the upper end portion of the support plate 39.

  The second driving device 45 includes a ball screw shaft 51 that is rotatably supported by the frame 33 and extends in the front-rear direction, and a ball screw nut 52 that is fixed to the support plate 39 while being screwed to the ball screw shaft 51. A third servo motor 53 for driving the ball screw shaft 51 is provided. The second drive device 45 is disposed between the pair of support plates 39. The ball screw nut 52 is attached to one support plate 39.

The power of the second driving device 45 is transmitted from the ball screw nut 52 to the one support plate 39, whereby the scraper supported by the first beam 37 and the first and second lifting devices 38 and 42. 31 and the squeegee 14 move together in the front-rear direction.
As shown in FIG. 2, the scraper 31 and the squeegee 14 are operated by the second driving device 45, and the ink supply start position located in the vicinity of the front end portion of the screen plate 17,
It can move between the position which becomes the rear end of the slide mechanism.

  The operation of the third servo motor 53 is controlled by the control device 16. The third servo motor 53 is controlled by the control device 16 so that the squeegee 14 moves forward at a predetermined speed during printing. At this time, the control device 16 controls the operations of the swing device 6 and the first drive device 24 described above in accordance with the position of the squeegee 14 during printing.

The control device 16 has longitudinal position data obtained by setting the longitudinal position of the highest portion of the stage 5 for each swing angle of the stage 5. Based on this position data, the control device 16 and the swing device 6 and the first and second drives so that the highest part of the base material 11 and the squeegee 14 are always located at the same position in the front-rear direction. The operation of the devices 24 and 45 is controlled. The position data in the front-rear direction is stored in the memory 54 (see FIG. 7) of the control device 16.
For this reason, the stage 5 swings in a direction opposite to the moving direction of the squeegee 14 in accordance with the position of the squeegee 14 in a state where the highest part of the base material 11 is in contact with the lower surface of the screen plate 17 and the squeegee. 14 parallel to the moving direction. In this embodiment, the lower surface of the screen plate 17 corresponds to the “other surface of the screen plate” in the present invention.

  As shown in FIG. 1, the frame 33 is supported by the base 2 via a third lifting device 55 and extends in the vertical direction, and is connected to the upper end portions of these columns 56 in the front-rear direction. And a plurality of second beams 57 extending in the vertical direction. The struts 56 can be provided at, for example, four locations surrounding the screen plate 17 when viewed from above. The screen plate 17 described above is supported by the support column 56 via brackets 58 extending in the front-rear direction at both ends in the left-right direction.

  As shown in FIG. 1, the third lifting device 55 according to this embodiment is provided for each column 56, and has a configuration in which each column 56 is moved up and down by the same lifting amount. Although not shown in detail, the third lifting device 55 can be configured using a ball screw mechanism. The ball screw mechanism includes a ball screw shaft extending in the vertical direction, a ball screw nut attached to the support column 56 in a state of being screwed to the ball screw shaft, and a fourth servo motor 59 for driving the ball screw shaft (see FIG. 7)).

  The second beam 57 is provided on one end side and the other end side of the screen printing machine 1 in the left-right direction. Of these second beams 57, one second beam 57 located on the right side of the screen printing machine 1 connects the upper ends of the two columns 56 arranged in the front-rear direction on the right side of the screen printing machine 1. doing. The other second beam 57 connects the upper ends of the two columns 56 arranged in the front-rear direction on the left side of the screen printing machine 1.

The second slide rails 46 of the second translation device 32 described above are provided on the two second beams 57, respectively. The second driving device 45 of the second translation device 32 is supported by one of the two second beams 57.
Of the four struts 56, the two struts 56 located on the rear side are connected to each other by a rear connecting member 61 extending in the left-right direction, and the two struts 56 located on the front side are connected in the left-right direction. They are connected to each other by the extending front connecting member 62.

  By operating the third lifting device 55, the four support columns 56 are moved up and down, and the screen plate 17, the scraper 31 and the squeegee 14 are moved up and down accordingly. When the column 56 is raised to the rising end, the screen plate 17 is positioned at the ink supply position shown in FIG. As shown in FIG. 2, the ink supply position of the screen plate 17 is a position where the height difference between the highest portion of the stage 5 at the printing start position and the screen plate 17 is h1.

  As shown in FIGS. 3 to 5, the third lifting device 55 positions the screen plate 17 at a printing position below the ink supply position during printing. This printing position is a position where the highest part of the substrate 11 contacts the lower surface of the screen plate 17 in a flat state. For this reason, the screen plate 17 and the base material 11 held on the stage 5 can contact and separate from each other. As shown in FIG. 3, the printing position is a position where the height difference between the highest portion of the stage 5 at the printing start position and the screen plate 17 becomes zero.

  In this embodiment, since the center of the arc constituting the convex curved surface of the stage 5 is located below the support shaft 8, the printing surface 11 a is caused by the stage 5 swinging about the support shaft 8. The highest part of is displaced in the vertical direction. For this reason, since the printing position changes in the vertical direction as the stage 5 swings, the support 56 is moved up and down so that the third lifting device 55 follows the swing of the stage 5.

  The operation of the fourth servo motor 59 of the third lifting device 55 is controlled based on the vertical position data stored in the memory 54 of the control device 16 during printing. The vertical position data is data for defining the vertical position of the screen plate 17 and is set based on the shape of the holding surface 12 (convex curved surface) of the stage 5. More specifically, the vertical position data is obtained by setting the vertical position of the highest portion of the holding surface 12 for each swing angle of the stage 5. In this embodiment, at the time of printing, the screen plate 17 is positioned at the same height as the highest portion of the printing surface 11a of the substrate 11 held on the holding surface 12.

Next, the screen printing method by the screen printer 1 including the configuration of the control device 16 will be described with reference to the flowcharts shown in FIGS. In performing screen printing, first, the substrate holding step S1 of the flowchart of FIG. 8 is performed.
In the substrate holding step S <b> 1, first, the substrate 11 is placed on the holding surface 12 of the stage 5 by the operator 71. This operation is performed in a state where the stage 5 is sent to the front side from the printing end position shown in FIG. In this state, the screen printer 1 starts to operate when the operator 71 operates the base material mounting switch 72 (see FIGS. 1 and 7).

When the base material mounting switch 72 is operated, the control device 16 first operates the suction device 15 to attract the base material 11 to the stage 5, and the swing device 6 and the first and second parallel movement devices. 7, 32, and the first to third elevators 38, 42, 55, etc. are initialized.
When the swing device 6 is initialized, as shown in FIG. 2, the stage 5 swings so as to be directed forward, and is positioned at the print start position.
When the first translation device 7 is initialized, the second servo motor 29 operates to move the stage 5 backward to the print start position shown in FIG.
When the second parallel movement device 32 is initialized, the third servo motor 53 operates to move the scraper 31 and the squeegee 14 to the ink supply start position shown in FIG.

When the first lifting device 38 is initialized, the scraper 31 moves to the retracted position.
As the second lifting device 42 is initialized, the squeegee 14 moves to the retracted position.
By initializing the third elevating device 55, the support column 56 is raised, and the screen plate 17 is positioned at the ink supply position. At this time, the scraper 31 and the squeegee 14 also move together with the screen plate 17.

After the initialization of each apparatus is thus completed, the process proceeds to the ink supply step S2.
In the ink supply step S2, first, the worker 71 supplies the ink 36 to the upper surface of the screen plate 17, and operates the ink supply switch 73 (see FIG. 7). The ink 36 is supplied near the lower portion of the scraper 31. After the ink supply switch 73 is operated, the control device 16 operates the first air cylinder 41 and lowers the scraper 31 to the application position as shown in FIG. Then, the control device 16 operates the second drive device 45 of the second parallel movement device 32 to move the scraper 31 and the squeegee 14 to the rear side, for example, the rear end portion of the second slide mechanism 44. At this time, the scraper 31 moves parallel to the screen plate 17 and spreads the ink 36 on the screen plate 17 to form an ink film.

Thereafter, the control device 16 operates the first air cylinder 41 to move the scraper 31 to the retracted position. After the scraper 31 moves in this way, the process proceeds to the printing step S3.
In the printing step S3, first, the control device 16 operates the third lifting device 55 to move the screen plate 17 to the printing position (see FIG. 3), and then operates the second driving device 45 to operate the squeegee. 14 is moved above the highest portion of the printing surface 11a. The position in the front-rear direction of the squeegee 14 at the time of printing is set based on the position data in the front-rear direction stored in the memory of the control device 16.

  Then, the control device 16 operates the second air cylinder 43 to move the squeegee 14 to the printing position as shown in FIG. At this time, the squeegee 14 presses the screen plate 17 against the substrate 11 with a predetermined pressing force. That is, the squeegee 14 comes into contact with the substrate 11 through the screen plate 17. At this time, the screen plate 17 is pressed by the squeegee 14 in a state where the screen plate 17 is positioned at substantially the same height as the highest portion of the printing surface 11a of the substrate 11, and is pressed against the printing surface 11a. For this reason, the screen plate 17 is pressed against the printing surface 11a with hardly extending.

Next, the control device 16 operates the second translation device 32 to move the squeegee 14 and the scraper 31 to the front side. At this time, the control device 16 operates the rocking device 6 to rock the holding surface 12 of the stage 5 at a predetermined angular velocity so that the holding surface 12 moves rearward from the printing start position shown in FIG. The swing device 6 swings the stage 5 in accordance with the movement of the squeegee 14 so that the screen plate 17 is pressed by the squeegee 14 to the highest portion of the printing surface 11a.
At this time, the third lifting device 55 lifts and lowers the support column 56 so that the screen plate 17 comes into contact with the highest portion of the printing surface 11a.

As the squeegee 14 moves forward and the stage 5 swings, the ink 36 contained in the pattern holes 34 of the screen plate 17 is transferred to the substrate 11. The portion of the screen plate 17 after the squeegee 14 has passed is separated from the printing surface 11a because the stage 5 swings backward.
The height of the squeegee 14 and the screen plate 17 during printing according to this embodiment is gradually lowered until the squeegee 14 reaches the intermediate position of the printing surface 11a as shown in FIG. 4, and as shown in FIG. As the squeegee 14 approaches the front end position (print end position) from the intermediate position of the printing surface 11a, it gradually increases. The screen plate 17 contacts the highest portion of the printing surface 11a from the start of printing to the end of printing. Further, the squeegee 14 presses the screen plate 17 from above on the highest portion of the printing surface 11a from the start of printing to the end of printing.

After the squeegee 14 has moved to the front end of the screen plate 17, the control device 16 stops the swing device 6 and the second translation device 32 and operates the second air cylinder 43 to retract the squeegee 14. Move to position. Further, the control device 16 operates the third lifting device 55 to move the screen plate 17 away from the base material 11 upward.
Thus, after the squeegee 14 and the stage 5 are stopped and the squeegee 14 and the screen plate 17 are moved upward, the process proceeds to the substrate take-out step S4.
In the substrate removal step S4, the control device 16 operates the second translation device 32 to move the stage 5 to the front end of the first slide rail 25, and then stops the suction device 15. Thus, the printing operation is completed when the suction device 15 is stopped.

  In the screen printing machine 1 configured as described above, the printed portion of the base material 11 moves in a direction away from the screen plate 17 as the stage 5 swings, and quickly leaves the screen plate 17. For this reason, plate separation is improved. Moreover, in this screen printing machine 1, since printing is performed by the stage 5, the screen plate 17, and the squeegee 14, the size and the manufacturing cost can be reduced as compared with a conventional screen printing machine having a blanket cylinder. Can be planned.

 Therefore, according to this embodiment, it is possible to provide a screen printing machine and a screen printing method capable of performing high-definition screen printing on a sheet-like printed material while reducing the size and manufacturing cost. it can. That is, according to the screen printer 1 and the screen printing method according to the present invention, the clearance between the base material 11 and the screen plate 17 can be reduced with respect to the single base material 11 without using a blanket cylinder. It is possible to perform screen printing that does not need to consider plate separation.

In the screen printing machine 1 according to this embodiment, the screen plate 17 and the base material 11 held on the stage 5 are configured to be able to contact and separate from each other. For this reason, even if the center of the arc constituting the convex surface of the printing surface 11a and the swing center of the stage 5 are different, the state in which the screen plate 17 and the printing surface 11a are in contact can be maintained. This means that the curvature of the convex curved surface of the stage 5 can be changed entirely or partially depending on the material, shape, thickness, etc. of the substrate 11.
Therefore, according to this embodiment, it is possible to provide a highly versatile screen printing machine that is less susceptible to restrictions on the material and thickness of the base material 11 having flexibility.

The oscillating device 6, the first and second parallel moving devices 7, 32, and the first to third elevating devices 38, 42, 55 shown in this embodiment are the same as the stage 5, the squeegee 14, and the screen. It is an example for realizing the operation of the plate 17. For this reason, the structure of these apparatuses is not limited to what was shown to this Embodiment, It can change suitably.
In this embodiment, the example in which the screen plate 17 moves in the vertical direction is shown in order to allow the base material 11 and the screen plate 17 to contact and separate from each other. However, the present invention is not limited to such a limitation, and can adopt a configuration in which the stage 5 moves in the vertical direction.

  The holding surface 12 of the stage 5 shown in this embodiment is a convex curved surface that curves with a substantially constant curvature. However, the shape of the convex curved surface of the holding surface 12 can be changed as appropriate. For example, the curvature of the holding surface 12 can be changed between both end portions and the center portion in the front-rear direction. A plurality of convex curved surfaces having different curvatures can be arranged in the front-rear direction to form one convex curved surface.

  The squeegee 14 according to this embodiment is configured to move up and down integrally with the screen plate 17. However, the squeegee 14 does not necessarily have to move up and down integrally with the screen plate 17. Depending on the printing conditions such as the shape of the substrate 11 and the type of the ink 36, the squeegee 14 does not move up and down integrally with the screen plate 17 during printing, and the screen plate 17 is bent up and down so as to bend and extend. It can be configured to move in the direction.

  DESCRIPTION OF SYMBOLS 1 ... Screen printer, 5 ... Stage, 6 ... Swing apparatus, 7 ... 1st parallel displacement apparatus, 11 ... Base material, 12 ... Holding surface, 14 ... Squeegee, 17 ... Screen plate, 31 ... Scraper, 32 ... Second translation device 34 ... pattern hole 36 ... ink 38 ... first lifting device 42 ... second lifting device 55 ... third lifting device S1 ... substrate holding step S3 ... printing Step.

Claims (3)

A stage for holding a substrate to be printed on the holding surface;
A screen plate provided with a pattern hole made of a printing pattern, and located on the opposite side of the stage from the base material on the stage and stretched flat.
A squeegee that moves along the screen plate in contact with the substrate through the screen plate, and transfers the ink supplied to one surface of the screen plate to the substrate;
The holding surface is formed by a convex curved surface that curves in the moving direction of the squeegee,
The stage swings in a direction opposite to the moving direction of the squeegee in accordance with the position of the squeegee while the base material is in contact with the other surface of the screen plate, and moves parallel to the moving direction of the squeegee. A screen printing machine characterized by being a thing. The screen printing machine according to claim 1.
The screen printing machine, wherein the screen plate and the substrate held on the stage are capable of contacting and separating from each other. A substrate holding step for holding a substrate that is a printed material on a holding surface formed of a convex curved surface of the stage;
An ink supply step in which an ink film is formed by a scraper on a screen plate stretched in a flat state at a position apart from a substrate on the stage;
While performing a transfer operation in which the squeegee moves along the screen plate in contact with the substrate through the screen plate, the stage swings in a direction opposite to the moving direction of the squeegee, and the moving direction of the squeegee A screen printing method comprising: a printing step that translates into the screen.

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