TWI766205B - Screen printing device and screen printing method - Google Patents

Abstract

When printing in the right direction, the squeegee (30) is coated with the slurry between the first squeegee (10) and the squeegee (30). The second squeegee up-down driving part (52) presses the second squeegee (20) on the screen plate (90), and the head (110) moves to the right to perform screen printing. The second squeegee (20) uses the paste between the first squeegee (10) and the squeegee (30) to perform printing. When printing in the left direction, printing is performed in the opposite motion as when printing in the right direction.

Description

Screen printing device and screen printing method

The present invention relates to a screen printing device and a screen printing method for screen printing.

There is a known device for screen printing a workpiece using two squeegees.

[Prior Art Literature]

[Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. 2005-014470

Patent Document 2: Japanese Patent Laid-Open No. 2019-014179

Patent Document 3: International Publication No. 2014/184877

Patent Document 4: Japanese Patent Laid-Open No. 2000-263752

The present invention provides a screen printing apparatus and a screen printing method for efficiently performing screen printing using two squeegees.

The screen printing apparatus of the present invention includes a head having a squeegee for applying the slurry, a first squeegee placed on the right side of the squeegee, and a second squeegee placed on the left side of the squeegee. , and drive the above-mentioned first scraper and the above-mentioned A vertical driving part of the second scraper; and a left and right driving part, which drives the head in the left-right direction; the first scraper is lowered by the vertical driving part, and the head is driven in the left direction by the left and right driving part, The above-mentioned squeegee coating slurry is screen-printed with the above-mentioned first squeegee on one side, and the above-mentioned second squeegee is lowered by the up and down driving part, and the above-mentioned head is driven in the right direction by the above-mentioned left and right driving part, and the above-mentioned squeegee is used on one side. One side of the coating slurry was screen-printed with the above-mentioned second doctor blade.

According to the present invention, screen printing can be performed efficiently using two squeegees.

100: Screen printing device

110: Head

10: First scraper

20: Second scraper

30: Scraper

31: Coating Department

32: Sharp corners

33: Right inclined plane

34: Left inclined plane

35: Wings

39: lower end

50: Up and down drive part

51: The first scraper up and down driving part

52: Second scraper up and down drive part

53: Upper and lower drive part of scraper

60: Left and right drive parts

61: Rails

62: Shaft

70: Control Department

80: Sensor

90: Screen version

91: Net Frame

900: Workpiece

910: Printing Workbench

FIG. 1 is a front view of the screen printing apparatus 100 of the first embodiment.

FIG. 2 is a right side view of the screen printing apparatus 100 according to the first embodiment.

FIG. 3 is an enlarged view of the screen printing apparatus 100 according to the first embodiment, (a) is an enlarged view of the front part of the head, and (b) is an enlarged view of the top of the head.

FIG. 4 is a flow chart of the operation of the screen printing apparatus 100 according to the first embodiment.

FIG. 5 is an explanatory diagram of the printing operation of the screen printing apparatus 100 according to the first embodiment.

FIG. 6 is an explanatory diagram of the printing operation of the screen printing apparatus 100 according to the first embodiment.

FIG. 7 is an explanatory diagram of the printing operation of the screen printing apparatus 100 according to the first embodiment.

8 is an explanatory diagram of the printing operation of the screen printing apparatus 100 using the sensor of the first embodiment.

FIGS. 9( a ) and ( b ) are partially enlarged views of a screen printing apparatus 100 using two squeegees according to the first embodiment.

Fig. 10 is a screen printing package in which the positions of the two squeegees of the first embodiment are staggered Set 100 top view.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, in the description of each embodiment, the description of the directions of "up", "down", "left", "right", "front", "rear", "outside" and "inside" is only for the purpose of For convenience of description, it is not intended to limit the arrangement or direction of devices, appliances, parts, etc.

<First Embodiment>

***Description of composition***

The configuration of the screen printing apparatus 100 will be described with reference to FIGS. 1 and 2 .

In FIG. 1, the back-and-forth direction which is a printing direction, ie, the left-right direction which faces the paper surface, is called the left-right direction.

In FIG. 1 , the up-down direction of the surface is referred to as the height direction.

In FIG. 1, the inner direction which faces the paper surface is called the width direction.

The screen printing apparatus 100 performs screen printing on the workpiece 900 placed on the printing table 910 .

The screen printing apparatus 100 performs screen printing by the screen frame 91 having the screen plate 90 .

The screen printing apparatus 100 includes a head 110 as a printing mechanism, and a left-right drive unit 60 that drives the head 110 in the left-right direction.

<<Head 110>>

The head portion 110 includes a first scraper 10 , a second scraper 20 , a scraper 30 , and a vertical driving portion 50 .

The scraper 30 is a metal scraper for applying the slurry.

The first scraper 10 is arranged on the right side of the scraper 30 .

The second scraper 20 is arranged on the left side of the scraper 30 .

The up-and-down driving part 50 drives the first scraper 10 , the second scraper 20 and the scraper 30 in the vertical direction, respectively.

<<Left and right drive unit 60>>

In order to move the head 110 in the horizontal direction, the left-right driving part 60 has a shaft 62 arranged in the horizontal direction.

The left-right drive unit 60 reciprocates the head 110 in the horizontal direction along the guide rail 61 .

In the screen printing apparatus 100 , two squeegees and one squeegee are driven to the right and left coaxially and simultaneously by the shaft 62 .

<<Up and down drive unit 50>>

The up-down drive unit 50 includes a first scraper up-down drive section 51 , a second scraper up-down drive section 52 , and a scraper up-down drive section 53 .

The first scraper vertical driving unit 51 drives the first scraper 10 in the vertical direction.

The second scraper vertical driving unit 52 drives the second scraper 20 in the vertical direction.

The squeegee up-and-down drive unit 53 drives the squeegee 30 in the up-down direction.

<<Control section 70>>

The screen printing apparatus 100 has a control unit 70 .

The control unit 70 controls the entire apparatus.

The control unit 70 can be realized by a central processing unit, a program, a memory, and a memory device.

The control unit 70 controls the vertical drive unit 50, the left and right drive units 60, and the like shown in FIG. 1 to control the printing operation described later.

The signal from the control part 70 is transmitted to each part through the signal line.

Each operation of the printing method described later can be realized by the control unit 70 transmitting/receiving commands and signals via signal lines.

The control unit 70 lowers the first scraper 10 by the vertical driving unit 50 , and performs screen printing by driving the head 110 in the left direction by the left and right driving unit 60 .

The control unit 70 lowers the second scraper 20 by the vertical driving unit 50 and drives the head 110 in the right direction by the left and right driving unit 60 to perform screen printing.

<<First scraper 10>>

The first squeegee 10 is a squeegee used for printing in the left direction, and as shown in FIG. 3 , the upper part thereof is installed obliquely toward the left side (inside).

<<Second scraper 20>>

The second squeegee 20 is a squeegee used for printing in the right direction, and as shown in FIG. 3 , the upper part thereof is installed obliquely toward the right side (inner side).

<<Scraper 30>>

The squeegee 30 is a metal blade used for the coating of the slurry in the left and right directions, and as shown in FIG. 3 , it is installed vertically with respect to the screen 90 .

In FIG. 3 , T2 is the set height position of the scraper 30 .

The set height position T2 of the squeegee 30 is the same as the height position T1 of the horizontal plane of the screen 90 .

T3 is the printing height position of the first squeegee 10 and the second squeegee 20 . The printing height position T3 is lower than the height position T1 of the horizontal plane of the screen 90 and the set height position T2 of the squeegee 30 .

The blade 30 has a coating portion 31 that coats the slurry.

The coating portion 31 is a rectangular plate-shaped portion arranged perpendicular to the screen plate 90 .

The lower end portion 39 of the coating portion 31 is in contact with or close to the surface of the screen plate 90 in the width direction.

In a cross section parallel to the left-right direction, the scraper 30 has a left inclined surface 34 inclined from the left side of the lower end portion 39 to the upper left and right center of the lower end portion 39 , and a left inclined surface 34 inclined from the right side of the lower end portion 39 to the upper left and right center of the lower end portion 39 . Right inclined surface 33 .

The lower end portion 39 of the coating portion 31 has an acute angle portion 32 in the left-right direction.

The acute-angled portion 32 on the right side is formed by intersecting the vertical plane on the right side of the coating portion 31 and the right inclined plane 33 at less than 90 degrees.

The left acute-angled portion 32 is formed by intersecting the left vertical surface of the coating portion 31 and the left inclined surface 34 at less than 90 degrees.

Furthermore, the shape of the lower end portion 39 of the scraper 30 can also be other shapes. For example, the inclination angles of the left inclined surface 34 and the right inclined surface 33 may be different. In addition, the right angle portion 32 of 90 degrees may be used instead of the acute angle portion 32 . In addition, the inclined surface of the scraper 30 may also have a curved surface.

The scraper has wings 35 bent in the left-right direction at both ends in the width direction.

The wing portion 35 is a metal plate bent leftward and rightward at both ends in the width direction of the coating portion 31 .

The lower end of the wing portion 35 is in contact with or close to the surface of the screen plate 90 to concentrate the slurry in the center.

The wings 35 are guardrails for preventing the paste from leaking out of the printing range.

Furthermore, the shape of the wing portion 35 of the scraper 30 can also be other shapes. For example, the wing portion 35 may have a curved surface. In addition, the blade 30 may not have the wings 35 .

As shown in FIG. 3, the squeegee 30 can be manufactured by combining two squeegees having different heights of the coating portion 31 back-to-back.

Alternatively, the squeegee 30 can be manufactured by combining two squeegees having the same shape back-to-back.

***Action description***

The screen printing method of the screen printing apparatus 100 will be described with reference to FIG. 4 .

Here, the operation of performing the printing in the right direction and then performing the printing in the left direction will be described.

*Initial setting*

The operations described below are performed based on electrical signals from the control unit 70 .

When the power of the screen printing apparatus 100 is turned on, the screen printing apparatus 100 starts the initial operation and performs the initial setting.

*Supply slurry

First, the slurry is supplied to the upper surface of the screen plate 90 by a slurry supply device not shown.

As shown in FIG. 5 , the slurry supply device supplies the slurry only between the first doctor blade 10 and the second doctor blade 20 .

The slurry supply device supplies slurry between the first scraper 10 and the scraper 30 and between the second scraper 20 and the scraper 30 .

There is no slurry on the outer sides of the first scraper 10 and the second scraper 20 .

In addition, the slurry may be manually supplied without using a slurry supply device.

*Fixing of scraper 30

The upper-lower driving part 53 of the squeegee drives the squeegee 30 in the up-down direction, and fixes the position of the squeegee 30 at the set height position T2.

The upper and lower driving portion 53 of the squeegee is to position the lower end portion 39 of the squeegee 30 at the same height as the horizontal plane of the screen plate 90 or slightly lower than the horizontal plane of the screen plate 90 .

With this positioning, the slurry can be applied to the screen 90 by the movement of the blade 30 in the left-right direction.

The control unit 70 positions the head 110 at the print start position on the left side by the left and right drive unit 60 .

*Workpiece setting step S1*

The control part 70 mounts the workpiece|work 900 on the printing table 910 by the unshown carrying-in apparatus.

At the same time, as shown in FIG. 5 , the first scraper up-and-down driving portion 51 lifts the first scraper 10 . At this time, the upper and lower positions of the scraper 30 are maintained and fixed at the set height position T2.

*Descent step S2 of the second scraper 20*

The second squeegee up-down drive unit 52 sets the second squeegee 20 at the printing height position T3 and presses the screen 90 . At this time, the upper and lower positions of the scraper 30 are maintained and fixed at the set height position T2.

*Right direction printing step S3*

The control unit 70 drives the head 110 in the right direction from the print start position on the left side by the left and right drive unit 60 .

When the head 110 is driven in the right direction, the upper and lower driving parts 53 on the squeegee make the squeegee 30 contact or approach the screen 90 without a gap to apply the slurry.

The screen plate 90 is coated with the slurry between the first doctor blade 10 and the doctor blade 30 while the doctor blade 30 is maintained at the set height position T2 while maintaining the vertical position.

The second squeegee vertical drive unit 52 presses the second squeegee 20 against the screen plate 90 to move the head 110 in the right direction to perform screen printing.

The second squeegee 20 performs printing using the paste between the first squeegee 10 and the squeegee 30 .

The control unit 70 moves the head 110 to the print end position on the right side by the left and right drive unit 60 .

*Workpiece setting step S4*

The control part 70 carries out the workpiece|work 900 which completed printing, and mounts a new workpiece|work 900 on the printing table 910 by the unshown carrying-out apparatus.

As shown in FIG. 6, the 2nd scraper up-down drive part 52 raises the 2nd scraper 20. At this time, the upper and lower positions of the scraper 30 are maintained and fixed at the set height position T2.

*Step S5 of descending the first scraper*

The first squeegee up-down drive unit 51 sets the first squeegee 10 at the printing height position T3 and presses the screen 90 . At this time, the upper and lower positions of the scraper 30 are maintained and fixed at the set height position T2.

*Left direction printing step S6*

When printing in the left direction, the printing end position on the right side is directly used as the printing start position on the right side, and the printing is performed in the opposite operation to that in the case of printing in the right direction.

The control unit 70 drives the head 110 in the left direction from the print start position on the right side by the left and right drive unit 60 .

When the head 110 is driven in the left direction, the upper and lower driving parts 53 on the squeegee make the squeegee 30 contact or approach the screen 90 without a gap to apply the slurry.

The screen plate 90 is coated with the slurry between the second doctor blade 20 and the doctor blade 30 while the doctor blade 30 is maintained at the set height position T2 while maintaining the vertical position.

The first squeegee vertical drive unit 51 presses the first squeegee 10 against the screen plate 90 to move the head 110 in the right direction to perform screen printing.

The first squeegee 10 performs printing using the paste between the first squeegee 10 and the squeegee 30 .

The control part 70 moves the head part 110 to the printing end position on the left side by the left and right driving part 60 .

*repeat steps*

The control part 70 judges whether there exists a next printing after carrying out the workpiece|work 900 which completed printing, and returns to setting step S2 when there exists a next printing.

When printing in the right direction, the printing end position on the left side is directly used as the printing start position on the left side, and printing is performed in the reverse operation of the printing in the right direction.

When the control unit 70 determines that there is no next printing, it ends the printing.

***Features of the first embodiment***

In the first embodiment, the squeegee is arranged between the 2 squeegees, and the 2 squeegee The slurry is arranged between the scraper. Therefore, in any printing in the left-right direction, the squeegee is arranged in front of the printing direction, and the squeegee is arranged in the rear.

The slurry between the left and right squeegees and the squeegee is used for the coating of the squeegee during the outgoing printing, and the slurry on the other side is used for the printing of the squeegee. The paste on one side is used for squeegee coating, and the paste on one side is used for squeegee printing.

***Description of the effect of the first embodiment***

According to the first embodiment, printing can be performed on the outgoing pass and the return pass, so that the printing efficiency can be improved.

According to the first embodiment, the printing start position of the printing in the left direction is the same as the printing end position of the printing in the right direction, and the printing end position of the printing in the left direction is the same as the printing start position of the printing in the right direction. Therefore, when switching in the left-right direction, the head 110 does not need to be moved left and right as long as the left and right squeegees are moved up and down, and the printing efficiency can be improved without moving the squeegee 30 up and down.

***Comparative Example***

The constitution of the first embodiment is compared with the constitution in which a squeegee is provided behind the squeegee, and the coating is performed on the outgoing route and the printing is performed on the return route.

As in the first embodiment, the case where coating and printing are performed only on the outgoing journey or only the return journey has the following characteristics compared with the case where the coating is performed on the outgoing journey and printing is performed on the return journey.

1. In the first embodiment, since the coating and printing are performed in one moving operation, compared with the case where the coating is performed on the outgoing journey and the printing is performed on the return journey, The paste does not dry out, which improves printing accuracy.

2. In the first embodiment, the printing direction is the same as the coating direction. On the other hand, when coating is performed on the outgoing route and printing is performed on the returning route, the printing direction is opposite to the coating direction.

3. In the first embodiment, there is always a paste between the squeegee and the squeegee, so the printing end position of the outgoing pass and the printing start position of the return pass can be set to be the same. In the case of printing on the return process, since the paste after printing is outside the squeegee, it is necessary to raise the squeegee to pass over the paste, resulting in unnecessary movement.

4. In the case of coating on the outgoing route and printing on the return route, since the squeegee is located behind the squeegee, the squeegee may have an impact on the off-screen. In the first embodiment, since there is no member behind the squeegee, it can provide the same off-screen as ordinary printing.

According to the first embodiment, it is possible to perform printing on one side of the coating, and it is not necessary to perform the coating for the next printing while performing the printing on one side, so that high-quality printing can be accomplished.

***First modification of the first embodiment***

(sensor 80)

The screen printing apparatus 100 of FIG. 8 has the sensor 80 .

The sensor 80 is a gap detection sensor for measuring the gap between the lower end 39 of the squeegee 30 and the screen 90 .

When printing in the right direction, the sensor 80 on the right side measures the distance between the lower end of the acute corner portion 32 on the right side and the screen 90 , and transmits it to the control unit 70 .

When printing in the left direction, the sensor 80 on the left side measures under the acute corner 32 on the left side The distance between the terminal and the screen 90 is transmitted to the control unit 70 .

The control unit 70 drives the squeegee upper and lower drive unit 53 so that the distance between the lower end 39 of the squeegee 30 and the screen 90 becomes zero, and dynamically adjusts the upper and lower positions of the squeegee 30 during printing.

As shown in FIG. 8 , during printing, since the screen plate 90 is pressed downward by the squeegee, the screen plate 90 descends downward at the printing position, and the screen plate 90 is inclined to the left and right of the printing position.

The descending distance of the screen 90 during printing depends on the distance between the screen 90 and the workpiece 900 . In addition, the inclination angle of the screen plate 90 during printing changes with the movement of the printing position.

Therefore, if the position of the squeegee 30 is fixed, the lower end portion 39 of the squeegee 30 may be separated from the screen 90 .

The sensor 80 measures the distance between the lower end 39 of the squeegee 30 and the screen 90 during the movement of the head 110 .

The control part 70 drives the upper and lower driving part 53 of the scraper to adjust the upper and lower positions of the scraper 30 in time during the movement of the head 110 .

Therefore, during printing, the lower end portion 39 of the squeegee 30 and the screen plate 90 can always be kept in contact or close to each other.

The upper and lower positions of the squeegee 30 are adjusted at a height position T2 between the height position T1 of the screen plate 90 and the height position T3 of the workpiece 900 .

When printing in the right direction, T2 gradually increases from the printing start position on the left to the printing end position on the right.

When printing in the left direction, T2 gradually increases from the printing start position on the right side toward the printing end position on the left side.

***Second modification of the first embodiment***

(2 scrapers 30)

The screen printing apparatus 100 of FIG. 9 has two squeegees 30 .

The two scrapers 30 are set at the set height position T2 at the time of initial setting.

The right squeegee 30 is fixed to the first squeegee 10. Therefore, if the first squeegee vertical drive unit 51 sets the right squeegee 30 at the printing height position T3, the right squeegee 30 is set at the set height position T2.

The left squeegee 30 is fixed to the second squeegee 20. Therefore, if the second squeegee up-down drive unit 52 sets the left squeegee 30 at the printing height position T3, the left squeegee 30 is set at the set height position T2.

In this example, the upper and lower driving parts 53 of the scraper are not required.

***The third modification of the first embodiment***

(Printing pressure change printing)

The printing pressure in the left direction and the printing pressure in the right direction can also be changed.

In the case of changing the printing pressure in the left direction and the printing pressure in the right direction, the set height position T2 of the squeegee 30 can also be changed in accordance with the printing pressure in the workpiece setting steps S1 and S4 in FIG. 4 . In the case of high printing pressure, compared with the case of low printing pressure, it is only necessary to lower the set height position T2 of the squeegee 30 .

***Fourth modification of the first embodiment***

(overlapping printing)

It is also possible to perform overlapping printing in the left and right directions on the same workpiece.

In the case of performing overlapping printing, in the workpiece setting step S4 of FIG. 4 , the workpiece 900 may be directly performed without exchanging the workpiece 900 .

***Fifth modification of the first embodiment***

(curved printing)

Workpieces with curved surfaces can also be printed.

In the case of printing a workpiece with a curved surface, as long as in the printing step S3 in the right direction of FIG. 4 , the control unit 70 makes the printing height position T3 of the first squeegee 10 and the squeegee 30 close to each other along the curved surface of the workpiece 900 . The set height position T2 can be changed. Similarly, in the printing step S6 in the left direction of FIG. 4 , the control unit 70 can change the printing height position T3 of the second squeegee 20 and the set height position T2 of the squeegee 30 along the curved surface of the workpiece 900 .

Even if the shape of the curved surface of the workpiece 900 is different and asymmetrical, the control unit 70 can still calculate the printing height position T3 and set the height position T2 from the shape of the curved surface of the workpiece 900 as long as the shape of the curved surface of the workpiece 900 is memorized in advance.

Alternatively, the control unit 70 can calculate the printing height position T3 and set the height position T2 from the curved surface shape of the workpiece 900 as long as the shape of the curved surface of the workpiece 900 is detected by a shape detection sensor not shown.

***Sixth modification of the first embodiment***

(Double workpiece printing)

As shown in FIG. 10 , the positions of the first scraper 10 and the second scraper 20 can also be staggered in the width direction.

The printing table 910 has two in the width direction, and can be arranged in two in the width direction 900 workpieces. The printing table 910 can be moved up and down or can be moved in the width direction, and the workpiece 900 is exchanged by the unillustrated workpiece unloading and loading device.

In the configuration shown in FIG. 10 , while the first squeegee 10 is leftward to print the workpiece 900 above the paper surface of FIG. 10 , the control unit 70 drives the printing table 910 and the workpiece unloading and loading device to exchange the drawings. Workpiece 900 below the sheet of 10.

In addition, while the second scraper 20 is oriented rightward to the workpiece 900 below the paper surface of FIG. 10 , the control unit 70 drives the printing table 910 and the workpiece unloading and loading device to exchange the workpiece above the paper surface of FIG. 10 . 900. That is, the control part 70 performs the workpiece|work setting of S1 and S4 shown in FIG. 4 in the printing of S3 and S6.

According to the structure shown in FIG. 10, the workpiece setting is not performed in S1 and S4, and printing efficiency can be improved.

Furthermore, as shown in FIG. 10 , the positions in the width direction of the first scraper 10 and the second scraper 20 may be arranged so as not to completely overlap in the width direction. Alternatively, the first scraper 10 and the second scraper 20 may be arranged so as to overlap at least partially in the width direction.

In FIG. 10 , one screen frame 91 is used, but two screen frames 91 may be provided corresponding to the printing table 910 .

As mentioned above, although embodiment of this invention was described, the form combining two or more of these embodiment can also be implemented. Alternatively, one of these embodiments may be partially implemented. Alternatively, a partial combination of two or more of these embodiments may be implemented. In addition, this invention is not limited to these embodiment, Various changes are possible as needed.

10: First scraper

20: Second scraper

30: Scraper

51: The first scraper up and down driving part

52: Second scraper up and down drive part

53: Upper and lower drive part of scraper

60: Left and right drive parts

90: Screen version

900: Workpiece

Claims (9)

A screen printing device, which is a screen printing device using a screen plate for screen printing, characterized in that it is provided with: a head, which has a squeegee for applying slurry, and is arranged on the right side of the squeegee The first scraper, the second scraper disposed on the left side of the scraper, and the up-and-down driving part that drives the first scraper and the second scraper in the vertical direction; and a left-right driving part that drives the head in the left-right direction Make the above-mentioned first scraper descend by the up-and-down drive part, drive the above-mentioned head in the left direction by the above-mentioned left-right drive part, carry out screen printing with the above-mentioned first scraper on one side with the above-mentioned scraper coating slurry on one side, and by The up-and-down drive part makes the above-mentioned second blade descend, and the above-mentioned head is driven in the right direction by the above-mentioned left-right drive part, and one side applies the slurry with the above-mentioned blade to carry out screen printing with the above-mentioned second blade, and the above-mentioned screen printing device has : a squeegee upper and lower drive part, which drives the squeegee in the up-down direction; and a sensor, which measures the interval between the lower end of the squeegee and the screen, and the upper and lower driving part of the squeegee uses the lower end of the squeegee to be connected to the screen. Adjust the upper and lower positions of the squeegee so that the space between the plates becomes zero. The screen printing apparatus according to claim 1, wherein the up-down drive unit includes: a first squeegee up-down drive unit that drives the first squeegee in an up-down direction; and a second squeegee up-down drive unit that drives the first squeegee in an up-down direction Two squeegees; when the head is driven to the left, the squeegee applies slurry to the screen, and the upper and lower driving parts of the first squeegee press the first squeegee on the screen to perform screen printing. In the case of driving the above-mentioned head in the right direction, the above-mentioned squeegee applies the slurry to the screen, and The second squeegee up-down drive unit presses the second squeegee on the screen to perform screen printing. The screen printing apparatus according to claim 1 or 2, wherein a slurry exists only between the first doctor blade and the second doctor blade, and the first doctor blade and the second doctor blade use the first doctor blade and the second doctor blade. The paste between the second doctor blades is printed. The screen printing apparatus according to claim 1 or 2, wherein when the head is driven in the left direction, the squeegee is coated with the slurry between the second squeegee and the squeegee, and the first squeegee is applied. A squeegee performs printing with the paste between the first squeegee and the squeegee, and when the head is driven to the right, the squeegee is coated with the slurry between the first squeegee and the squeegee. cloth, and the second squeegee performs printing using the paste between the second squeegee and the squeegee. The screen printing apparatus according to claim 1 or 2, wherein the squeegee has a coating portion for coating the slurry, and a lower end portion of the coating portion has an acute angle portion in the left-right direction. The screen printing apparatus according to claim 1 or 2, wherein the squeegee has wings bent in the left-right direction at both ends in the width direction. The screen printing apparatus according to claim 1 or 2, wherein the first squeegee and the second squeegee are arranged at positions shifted in the width direction. A screen printing method comprising a screen printing device comprising a squeegee for applying slurry, a first squeegee arranged on the right side of the squeegee, and a second squeegee arranged on the left side of the squeegee. The screen printing method is characterized in that: while applying the slurry with the squeegee, the first squeegee is lowered and performed in the left direction. Screen printing, and while applying the slurry with the above-mentioned squeegee, the second squeegee is lowered to perform screen printing in the right direction. The printing start position of the left direction printing is the same as the printing end position of the right direction printing. The printing end position of directional printing is the same as the printing starting position of right printing. When switching to the left and right directions, the squeegee does not move up and down and is fixed at the set height position. The screen printing method of claim 8, wherein, when printing in the left direction, the squeegee is coated with the slurry between the second squeegee and the squeegee, and the first squeegee is applied with the first squeegee and the squeegee. The slurry between the squeegees is printed, and when printing in the right direction, the squeegee is coated with the slurry between the first squeegee and the squeegee, and the second squeegee uses the second squeegee and the squeegee. The paste between the above-mentioned squeegees performs printing.

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