JP7043740B2 - Screen printing device - Google Patents

Description

The present invention relates to a screen printing device.

As the screen printing apparatus, there is known a configuration in which a plurality of scrapers for coating the paste applied on the screen plate are arranged in the paste coating direction (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2004-9587

By the way, since the scraper is formed in a flat plate shape, when the scraper coats the paste, the paste that moves in the width direction of the scraper only spreads to the outside of the scraper, and the paste is difficult to stir. Therefore, when the paste is newly supplied on the screen plate, it is difficult to equalize the viscosities of the newly supplied paste and the supplied paste.

An object of the present invention is to provide a screen printing apparatus capable of increasing the stirring efficiency of a paste.

A screen printing device for solving the above problems is a screen printing device having a plurality of scrapers for coating a paste on a screen plate, wherein the plurality of scrapers include a first scraper for stirring the paste on the screen plate and the above. It has a second scraper that spreads the paste onto the screen plate, and the first scraper and the second scraper are such that the first scraper is in the paste coat direction, which is the direction in which the paste is coated on the screen plate. They are arranged side by side at intervals so as to be in front of the second scraper, and the tip of the first scraper on the screen plate side is provided with a slit extending in the height direction of the first scraper. ..

According to this configuration, when the first scraper and the second scraper coat the paste, the paste on both sides in the width direction of the slit enters the slit, so that the paste is agitated in the slit. Then, the paste that has passed through the slit spreads in the width direction of the first scraper, and thus mixes with the paste that has passed through the other first scraper. This further agitates the paste. Therefore, the stirring efficiency of the paste can be improved.

In one form of the screen printing device, a plurality of the slits are provided at intervals in the width direction of the first scraper.
According to this configuration, when the first scraper and the second scraper coat the paste, the chance of stirring the paste by the slit can be increased. In addition, since the pastes that have passed through the adjacent slits are mixed with each other, the stirring efficiency of the paste can be further improved.

In one form of the screen printing apparatus, the portion between the slits adjacent to each other in the width direction in the first scraper is inclined with respect to the direction orthogonal to the paste coat direction in the plan view of the first scraper. There is.

According to this configuration, when the first scraper and the second scraper coat the paste, the paste is guided to the slit of the first scraper. Therefore, since the amount of paste that passes through the slit, that is, the agitated paste increases, the agitation efficiency of the paste is improved.

In one form of the screen printing device, the screen printing device has a plurality of the first scrapers, and the plurality of first scrapers are in front of the second scraper in the paste coat direction. They are arranged side by side.

According to this configuration, by having a plurality of first scrapers, the paste passes through the slit in the paste coat direction when the first scraper and the second scraper coat the paste as compared with a single first scraper. The number of times increases. Therefore, the stirring efficiency of the paste can be improved.

In one form of the screen printing apparatus, a position in the width direction of the slit of the first scraper in front of the paste coat direction and a position in the width direction of the slit of the first scraper behind the paste coat direction. Are different from each other.

According to this configuration, the pastes that have passed through the slits of the front first scraper pass through the slits of the rear first scraper due to the different positions in the width direction of the slits in the first scrapers arranged in the paste coat direction. To move in the width direction. Therefore, the stirring efficiency of the paste can be further improved.

In one form of the screen printing device, the screen printing device has a plurality of the first scrapers, and the plurality of first scrapers are in front of the second scraper in the paste coat direction. Arranged side by side, the position in the width direction of the slit of the first scraper in front of the paste coat direction and the position in the width direction of the slit of the first scraper behind the paste coat direction are different from each other. The portion of each of the plurality of first scrapers between the slits adjacent to each other in the width direction is inclined with respect to the direction orthogonal to the paste coat direction in the plan view of the first scraper, and is forward in the paste coat direction. The inclination direction of the portion between the slits adjacent to the width direction in the first scraper and the inclination direction of the portion between the slits adjacent to the width direction in the first scraper behind the paste coat direction. Is the opposite.

According to this configuration, the moving direction of the paste in the width direction for entering the slit of the first scraper in the front and the moving direction in the width direction of the paste for entering the slit of the first scraper in the rear are set. It goes in the opposite direction. Therefore, more pastes can be easily agitated with each other, and the agitation efficiency of the pastes can be further improved.

One form of the screen printing apparatus for solving the above problems is a screen printing apparatus having a plurality of scrapers for coating a paste on a screen plate, wherein the plurality of scrapers are a first scraper for stirring the paste on the screen plate. And a second scraper that spreads the paste onto the screen plate, the first scraper and the second scraper being the first in the paste coat direction, which is the direction in which the paste is coated on the screen plate. The scrapers are arranged side by side at intervals so as to be in front of the second scraper, and the first scraper and the screen plate when the first scraper and the second scraper coat the screen plate with the paste. The distance between the second scraper and the screen plate is equal to or greater than the distance between the second scraper and the screen plate, and a protrusion protruding forward is provided on the front side of the first scraper in the paste coat direction.

According to this configuration, when the first scraper and the second scraper coat the paste, the protrusions of the first scraper move the paste in the width direction. Therefore, the stirring efficiency of the paste by the first scraper can be improved as compared with the flat plate-shaped first scraper.

According to the screen printing apparatus of the present invention, the stirring efficiency of the paste can be improved.

The schematic diagram which shows the schematic structure of the screen printing apparatus of 1st Embodiment. Front view showing a part of the first scraper. FIG. 1 is a sectional view taken along line 3-3 of the first scraper and the second scraper of FIG. (A) to (c) are schematic views showing an example of a printing operation of a screen printing apparatus. FIG. 3 is an enlarged view of FIG. 3 when the paste is coated by the first scraper. The schematic diagram which shows the schematic structure of a part of the screen printing apparatus of 2nd Embodiment. (A) is a cross-sectional view of a first scraper and a second scraper, and (b) is an enlarged view of (a) when the paste is coated by the first scraper. (A) is a cross-sectional view of the first scraper and the second scraper of the modified example, and (b) is an enlarged view of (a) when the paste is coated by the first scraper. (A) is a cross-sectional view of the first scraper and the second scraper of the modified example, and (b) is an enlarged view of (a) when the paste is coated by the first scraper. (A) is a cross-sectional view of the first scraper and the second scraper of the modified example, and (b) is an enlarged view of (a) when the paste is coated by the first scraper. (A) is a cross-sectional view of the first scraper and the second scraper of the modified example, and (b) is an enlarged view of (a) when the paste is coated by the first scraper. (A) is a cross-sectional view of the first scraper and the second scraper of the modified example, and (b) is an enlarged view of (a) when the paste is coated by the first scraper. (A) is a cross-sectional view of the first scraper and the second scraper of the modified example, and (b) is an enlarged view of (a) when the paste is coated by the first scraper.

Each embodiment of the screen printing apparatus will be described with reference to the drawings. In each of the following embodiments, an example is a screen printing apparatus used for printing a conductive paste for an internal electrode on the surface of a ceramic green sheet to be a ceramic layer in a manufacturing process of a laminated ceramic electronic component such as a laminated ceramic capacitor. To explain.

It should be noted that the attached drawings may show enlarged components for ease of understanding. The dimensional ratios of the components may differ from the actual ones or those in another drawing. Also, in the cross-sectional view, hatching of some components may be omitted for ease of understanding.

(First Embodiment)
As shown in FIG. 1, the screen printing apparatus 1 is arranged so as to face the printing table 10 on which the ceramic green sheet 2 to be printed is placed and the ceramic green sheet 2 in the height direction Z so as to face each other with a gap. A screen plate 11 and a support structure 12 that supports the screen plate 11 are provided. A conductive paste P is applied to the upper surface of the screen plate 11 by a supply device (not shown). The support structure 12 has a plurality of supports 13 and a plate frame 14 for holding the screen plate 11. The plurality of supports 13 are provided on the outside of the ceramic green sheet 2 on the printing table 10. An example of the support 13 is an air cylinder that can move in the height direction Z. A plate frame 14 is attached to the tip of the support 13. The plate frame 14 connects the outer edges of the screen plate 11.

Further, the screen printing device 1 includes a plurality of scrapers 20 for coating the paste P on the screen plate 11, and a squeegee 15 for printing the paste P on the screen plate 11 on the ceramic green sheet 2. The plurality of scrapers 20 and the squeegee 15 are located above the screen plate 11. The plurality of scrapers 20 are located behind the squeegee 15 in the paste coating direction X1 in which the scrapers 20 coat the screen plate 11 with the paste P. The squeegee 15 moves from the printing start side to the printing end side in a state where the screen plate 11 is pressed from the upper surface side thereof and the screen plate 11 is in contact with the ceramic green sheet 2. That is, when the paste P is printed on the ceramic green sheet 2, the squeegee 15 moves in the printing direction X2, which is the direction opposite to the paste coat direction X1.

The plurality of scrapers 20 include a first scraper 21 that stirs the paste P on the screen plate 11, a second scraper 22 that spreads the paste P onto the screen plate 11 to a uniform thickness, and a first scraper 21 and a second scraper. 22 has a moving body 23 that can be moved in the paste coat direction X1 and the print direction X2. The first scraper 21 and the second scraper 22 are attached to the moving body 23. The first scraper 21 and the second scraper 22 are arranged side by side so that the first scraper 21 is in front of the second scraper 22 in the paste coat direction X1. A gap is formed between the first scraper 21 and the second scraper 22 in the paste coat direction X1. The distance between the upper surface of the screen plate 11 and the lower end surface of the first scraper 21 and the distance between the upper surface of the screen plate 11 and the lower end surface of the second scraper 22 are equal to each other.

As shown in FIG. 2, the first scraper 21 has a flat plate-shaped base portion 31 attached to the moving body 23 (see FIG. 1) and a stirring portion 32 extending downward (screen plate 11 side) from the base portion 31. The stirring unit 32 is provided at the tip of the first scraper 21 on the screen plate 11 side. The base portion 31 and the stirring portion 32 are integrally formed. The stirring unit 32 is provided with a plurality of slits 33 at intervals in the width direction Y of the first scraper 21. That is, the stirring unit 32 has a plurality of stirring bodies 34 partitioned in the width direction Y by the slit 33. The plurality of slits 33 of the present embodiment are provided at equal intervals in the width direction Y of the first scraper 21. The slit 33 extends in the height direction Z of the first scraper 21. Further, the width dimensions of the plurality of slits 33 of the present embodiment are equal to each other, and the height dimensions of the plurality of slits 33 are equal to each other. The number of slits 33 can be arbitrarily changed. Further, the distance between the adjacent slits 33 in the width direction Y may be different from the distance between the other adjacent slits 33, that is, the width dimension of the stirring body 34 may be different from the width dimension of the other stirring body 34.

As shown in FIG. 3, the second scraper 22 is formed in a flat plate shape in which no slit is formed. The width dimension of the second scraper 22 is equal to or larger than the width dimension of the first scraper 21. In the present embodiment, the width dimension of the second scraper 22 is larger than the width dimension of the first scraper 21. Each of the thickness dimension (plate thickness) of the second scraper 22 and the thickness dimension (plate thickness) of the first scraper 21 can be arbitrarily set. In the present embodiment, the thickness dimension (plate thickness) of the second scraper 22 and the thickness dimension (plate thickness) of the first scraper 21 are equal to each other.

Next, a printing method by the screen printing apparatus 1 will be described with reference to FIGS. 4 and 5. The paste P shown by shading in FIG. 5 mainly indicates the paste that passes through the slit 33.

As shown in FIG. 4A, the moving body 23 moves the plurality of scrapers 20 in the paste coat direction X1. Along with this, the first scraper 21 stirs the paste P in the paste coat direction X1 and the height direction Z as shown by the arrows in FIG. 4 (a). In addition, as shown in FIG. 5, the paste P moves behind the first scraper 21 through the plurality of slits 33 as the first scraper 21 moves in the paste coat direction X1. More specifically, as shown by the arrow in the paste P in FIG. 5, the paste P in contact with the stirring body 34 of the stirring portion 32 of the first scraper 21 moves in the width direction Y of the first scraper 21 and the slit 33. Enter into. Then, the paste P that has passed through the slit 33 moves so as to spread again in the width direction Y. When the paste P enters the slit 33 from two agitators 34 adjacent to each other in the width direction Y across the slit 33, the paste P that enters the slit 33 from the one agitator 34 and the other agitator 34 enter the slit 33. Since the invading paste P is mixed, the paste P is agitated. Then, the paste P that has passed through the slit 33 spreads toward the two stirring bodies 34 that are adjacent to each other in the width direction Y with the slit 33 in between. Then, although not shown in FIG. 5, in the space between the first scraper 21 and the second scraper 22, the paste P is stirred because it mixes with the paste P spreading from another slit 33 to the stirring body 34. .. In addition, the paste P that has passed through the slit 33 mixes with the paste P that has passed between the lower end surface of the first scraper 21 and the upper surface of the screen plate 11, so that the paste P is further agitated. Then, the agitated paste P is spread on the screen plate 11 by the second scraper 22 so as to have a uniform thickness.

As shown in FIG. 4B, the paste on the screen plate 11 is coated by the plurality of scrapers 20, and the movement of the plurality of scrapers 20 in the paste coating direction X1 is stopped. Then, the squeegee 15 and the plurality of scrapers 20 move in the printing direction X2.

As shown in FIG. 4C, the squeegee 15 moves in the printing direction X2 in a state where the screen plate 11 is pressed from above and the screen plate 11 is in contact with the ceramic green sheet 2. As a result, the paste P coated on the screen plate 11 is printed on the ceramic green sheet 2 by the squeegee 15. After printing is completed, the state shown in FIG. 4A is restored. At this time, since the paste P is scraped up by the squeegee 15, the paste P is accumulated in front of the first scraper 21. In the screen printing device 1, FIGS. 4A to 4C are repeated, and when the paste P decreases by a predetermined amount, the paste P is supplied from the supply device.

As described above, according to the present embodiment, the following effects are obtained.
(1-1) The first scraper 21 for stirring the paste P is provided with a slit 33. Therefore, when the first scraper 21 and the second scraper 22 coat the paste P on the screen plate 11, the pastes P on both sides of the width direction Y of the slit 33 enter the slit 33, so that the paste P is agitated in the slit 33. Will be done. The paste P that has passed through the slit 33 is mixed with the paste P that has passed between the lower end surface of the first scraper 21 and the upper surface of the screen plate 11. As a result, the paste P is further stirred. Therefore, the stirring efficiency of the paste P can be increased.

(1-2) A plurality of slits 33 are provided at intervals in the width direction Y of the first scraper 21. According to this configuration, when the first scraper 21 and the second scraper 22 coat the paste P on the screen plate 11, the chance of stirring the paste P by the slit 33 can be increased. In addition, in the space between the first scraper 21 and the second scraper 22, the pastes P that have passed through the slits 33 adjacent to each other in the width direction Y are mixed with each other, so that the stirring efficiency of the paste P can be further improved.

(1-3) Since the slits 33 having the same shape are provided at equal intervals in the width direction Y of the first scraper 21, it is possible to suppress the amount of the paste P passing through the first scraper 21 from being biased in the width direction Y.

(Second Embodiment)
A second embodiment of the screen printing apparatus 1 will be described with reference to FIGS. 6 and 7. The screen printing device 1 of the present embodiment has a different configuration of the first scraper 21 than the screen printing device of the first embodiment. In this embodiment, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted as appropriate. Further, the description of the relationship between the same constituent members will be omitted as appropriate.

As shown in FIG. 6, the first scraper 21 and the second scraper 22 are arranged side by side so that the first scraper 21 is in front of the second scraper 22 in the paste coat direction X1. The distance between the upper surface of the screen plate 11 and the lower end surface of the first scraper 21 is preferably greater than or equal to the distance between the upper surface of the screen plate 11 and the lower end surface of the second scraper 22. In the present embodiment, the distance between the upper surface of the screen plate 11 and the lower end surface of the first scraper 21 is larger than the distance between the upper surface of the screen plate 11 and the lower end surface of the second scraper 22. As shown in FIG. 7A, the first scraper 21 is not provided with the slit 33 as in the first embodiment. A protrusion 35 projecting forward is provided on the front side of the stirring portion 32 of the first scraper 21 in the paste coat direction X1. The protrusion 35 is provided integrally with the stirring unit 32. A plurality of protrusions 35 are provided at intervals in the width direction Y of the first scraper 21. The plurality of protrusions 35 of the present embodiment are provided at equal intervals in the width direction Y of the first scraper 21. The protrusion 35 extends in the height direction Z of the first scraper 21 (see FIG. 6). Each of the width dimensions of the plurality of protrusions 35 of the present embodiment is equal to each other, and each of the height dimensions of the plurality of protrusions 35 is equal to each other.

The protrusion 35 has a first inclined surface 35a that inclines to one side in the width direction Y from the top of the protrusion 35 toward the rear (printing direction X2), and to the other side in the width direction Y from the top of the protrusion 35 toward the rear. It has a second inclined surface 35b that is inclined.

When the paste on the screen plate 11 is coated by the plurality of scrapers 20, the first scraper 21 stirs the paste P as follows. That is, as shown in FIG. 7B, a part of the paste P moves along the first inclined surface 35a and the second inclined surface 35b of the plurality of protrusions 35. At this time, as the first scraper 21 moves in the paste coat direction X1, it is also stirred in the paste coat direction X1 and the height direction Z (see the arrow in the paste P in FIG. 4A). Then, it passes between the upper surface of the screen plate 11 and the lower end surface of the first scraper 21. Then, the agitated paste P is spread on the screen plate 11 by the second scraper 22 so as to have a uniform thickness. As described above, according to the present embodiment, the same effect as that of the first embodiment can be obtained.

(Modification example)
The description of each of the above embodiments is an example of possible embodiments of the screen printing apparatus of the present invention, and is not intended to limit the embodiments. The screen printing apparatus of the present invention may take, for example, a modification of each of the above embodiments shown below, and a combination of at least two modifications that do not contradict each other.

-In the first embodiment, the shape of the stirring body 34 of the stirring unit 32 of the first scraper 21 can be arbitrarily changed. In one example, as shown in FIG. 8 (a), the stirrer 34 has a protrusion 36. The protrusion 36 extends in the height direction Z of the first scraper 21. In one example, the width dimensions of the plurality of protrusions 36 are equal to each other, and the height dimensions of the plurality of protrusions 36 are equal to each other. The protrusion 36 has a first inclined surface 36a that inclines to one side in the width direction Y from the top of the protrusion 36 toward the rear, and a second inclination that inclines to the other side in the width direction Y from the top of the protrusion 35 toward the rear. It has a surface 36b.

The paste on the screen plate 11 is coated with the plurality of scrapers 20, and as shown in FIG. 8B, a part of the paste P is a first inclined surface 36a and a second inclined surface 36a of the protrusion 36 of each stirring body 34. It moves along the surface 36b and enters the slit 33. The paste P that has passed through the slit 33 moves so as to spread again in the width direction Y. As shown by the arrows in the paste P in FIG. 8B, the paste P moves in the direction opposite to the width direction Y on the front side and the rear side of the first scraper 21, so that the paste P is agitated.

-In the first embodiment, the number of the first scraper 21 and the number of the second scraper 22 can be arbitrarily changed. For example, the plurality of scrapers 20 may have a plurality of at least one of the first scraper 21 and the second scraper 22. FIG. 9A shows a configuration in which a plurality of scrapers 20 have two first scrapers 21 and one second scraper 22. Of the two first scrapers 21, the position in the width direction Y of the slit 33 of the first scraper 21A on the front side of the paste coat direction X1 and the width direction of the slit 33 of the first scraper 21B on the rear side of the paste coat direction X1. The positions of Y are different from each other. That is, the paste P that has passed through the slit 33 of the first scraper 21A is configured to come into contact with the stirring body 34 of the first scraper 21B.

According to this configuration, by having the two first scrapers 21A, 21B, when the first scrapers 21A, 21B and the second scraper 22 coat the paste P on the screen plate 11, one first scraper 21 In comparison, the number of times the slit 33 is passed in the paste coat direction X1 increases. Therefore, the stirring efficiency of the paste P can be improved.

In addition, as shown in FIG. 9B, the position of the slit 33 of the first scraper 21A in the width direction Y and the position of the slit 33 of the first scraper 21B in the width direction Y are different from each other. The paste P that has passed through the slit 33 of the scraper 21A moves in the width direction Y in order to pass through the slit 33 of the first scraper 21B. Therefore, the stirring efficiency of the paste P can be further improved.

In the modified example of FIG. 9, the shape of each of the stirring bodies 34 of the first scrapers 21A and 21B can be arbitrarily changed. For example, the shape of each of the stirring bodies 34 of the first scrapers 21A and 21B can be changed to the following (A) to (D).

(A) As shown in FIG. 10A, the stirring body 34 of each of the scrapers 21A and 21B is inclined with respect to the width direction Y. The tilting direction of the stirring body 34 of the first scraper 21A and the tilting direction of the stirring body 34 of the first scraper 21B are different from each other. The stirring body 34 of the first scraper 21A is tilted backward (printing direction X2) toward one side in the width direction Y, and the stirring body 34 of the first scraper 21B is tilted forward toward one side in the width direction Y. ing.

As shown in FIG. 10B, when the first scrapers 21A and 21B and the second scraper 22 coat the paste P on the screen plate 11, the paste P enters the slit 33 from the stirring body 34 of the first scraper 21A. Moves to one side of the width direction Y. The paste P that has passed through the slit 33 moves to the other side in the width direction Y by the stirring body 34 of the first scraper 21B, and enters the slit 33 of the first scraper 21B. The paste P that has passed through the slit 33 of the first scraper 21B spreads in the width direction Y.

According to this configuration, when the first scrapers 21A and 21B and the second scraper 22 coat the paste P on the screen plate 11, the paste P can be easily guided to the respective slits 33 of the first scrapers 21A and 21B. Therefore, the amount of paste P that passes through the slits 33 of the first scrapers 21A and 21B, that is, the agitated paste P increases. Therefore, the stirring efficiency of the paste P can be increased.

In addition, the moving direction of the paste P for entering the slit 33 of the first scraper 21A in the width direction Y and the moving direction of the paste P for entering the slit 33 of the first scraper 21B in the width direction Y. Is in the opposite direction. Therefore, more pastes P can be easily agitated with each other, so that the agitation efficiency of the paste P can be further improved.

(B) As shown in FIG. 11 (a), the stirring body 34 of each of the scrapers 21A and 21B is inclined with respect to the width direction Y. The plurality of agitators 34 of the first scraper 21A are inclined with respect to the width direction Y so that the paste P is concentrated in the center of the width direction Y of the first scraper 21A. Of the plurality of stirring bodies 34 of the first scraper 21A, the stirring body 34 at the end of the first scraper 21A in the width direction Y is inclined rearward (printing direction X2) toward the center of the first scraper 21A in the width direction Y. is doing. The central stirrer 34 of the first scraper 21A is along the width direction Y. That is, the stirring body 34 at the center of the first scraper 21A is not inclined with respect to the width direction Y. The stirrer 34 of the first scraper 21B is inclined with respect to the width direction Y so that the paste P is directed toward the end of the first scraper 21A in the width direction Y. The stirring body 34 of the first scraper 21B is inclined forward toward the center of the stirring body 34 of the first scraper 21B in the width direction Y.

As shown in FIG. 11B, when the first scrapers 21A and 21B and the second scraper 22 coat the paste P on the screen plate 11, the stirrer 34 of the first scraper 21A applies the paste P to the first scraper 21A. Move toward the center of the width direction Y of. Then, the paste P that has passed through the slit 33 of the first scraper 21A moves toward the end of the first scraper 21B in the width direction Y by the stirring body 34 of the first scraper 21B. In this way, the moving direction of the paste P by the first scraper 21A in the width direction Y and the moving direction of the paste P by the first scraper 21B in the width direction Y are opposite to each other. Is easier to stir. Therefore, the stirring efficiency of the paste P can be further improved.

(C) At least one of the stirring body 34 of the first scraper 21A and the stirring body 34 of the first scraper 21B may be changed to the first scraper 21 of FIG. FIG. 12A shows a configuration in which both the first scrapers 21A and 21B are changed to the first scrapers 21 of FIG. As shown in FIG. 12B, when the first scraper 21A, 21B and the second scraper 22 coat the paste P on the screen plate 11, the protrusion 36 of the first scraper 21A causes the paste P to be attached to the first scraper 21A. Guided by the slit 33. The paste P that has passed through the slit 33 of the first scraper 21A is guided to the slit 33 of the first scraper 21B by the protrusion 36 of the first scraper 21B. Therefore, since the paste P smoothly enters each of the slit 33 of the first scraper 21A and the slit 33 of the first scraper 21B, the stirring efficiency of the paste P can be further improved.

(D) At least one of the first scrapers 21A and 21B may be changed to the configuration of the first scraper 21 of the second embodiment. When one of the first scrapers 21A and 21B is changed to the configuration of the first scraper 21 of the second embodiment, the first scraper 21B behind the paste coat direction X1 is changed to the configuration of the first scraper 21 of the second embodiment. It is preferable to do.

In the modified examples of FIGS. 9 to 12, the length of the first scraper 21A in the width direction Y and the length of the first scraper 21B in the width direction Y can be arbitrarily changed. For example, the length of the first scraper 21A in the width direction Y may be longer than or equal to the length of the first scraper 21B in the width direction Y.

-In each of the above embodiments, the shape of the second scraper 22 can be arbitrarily changed. In one example, as shown in FIG. 13A, a protrusion 37 is formed on the front side of the paste coat direction X1 in the second scraper 22. The protrusion 37 has the same shape as the protrusion 35 of the second embodiment, and has a first inclined surface 37a and a second inclined surface 37b. In the width direction Y, the position of the protrusion 37 is equal to the position of the slit 33.

As shown in FIG. 13B, the paste P that has passed through the slit 33 of the first scraper 21 is moved in the width direction Y by the protrusion 37 of the second scraper 22. As a result, the amount of the paste P in the second scraper 22 is suppressed from being biased in the width direction Y. Therefore, the second scraper 22 facilitates the formation of the paste P having a uniform thickness on the screen plate 11. The protrusion 37 of the second scraper 22 may be applied to the second embodiment and the second scraper 22 shown in FIGS. 9 to 12.

1 ... screen printing device, 11 ... screen plate, 20 ... scraper, 21,21A, 21B ... first scraper, 22 ... second scraper, 33 ... slit, 34 ... stirrer (slits adjacent to each other in the width direction of the first scraper) (Part between), 35 ... protrusion, P ... paste, X1 ... paste coat direction, X2 ... printing direction, Y ... width direction, Z ... height direction.

Claims (5)

With multiple scrapers to coat the paste on the screen plate,
A squeegee that is located in front of the plurality of scrapers in the paste coating direction, which is the direction in which the paste is coated on the screen plate, presses the screen plate against the printed matter, and prints the paste on the printed matter.
In a screen printing device with
The plurality of scrapers have a first scraper that stirs the paste on the screen plate and a second scraper that spreads the paste onto the screen plate.
The first scraper and the second scraper are arranged side by side at intervals so that the first scraper is in front of the second scraper in the paste coat direction.
A screen printing apparatus in which, of the first scraper and the second scraper, only the first scraper is provided with a slit extending in the height direction of the first scraper at the tip end portion on the screen plate side. Of the first scraper and the second scraper, only the second scraper is provided with a protrusion protruding forward on the front side in the paste coat direction.
The screen printing apparatus according to claim 1 , wherein the position of the tip of the protrusion is equal to the position of the slit in the width direction of the second scraper . With multiple scrapers to coat the paste on the screen plate,
A squeegee that is located in front of the plurality of scrapers in the paste coating direction, which is the direction in which the paste is coated on the screen plate, presses the screen plate against the printed matter, and prints the paste on the printed matter.
In a screen printing device with
The plurality of scrapers have a first scraper that stirs the paste on the screen plate and a second scraper that spreads the paste onto the screen plate.
The first scraper and the second scraper are arranged side by side at intervals so that the first scraper is in front of the second scraper in the paste coat direction.
In the first scraper, a slit extending in the height direction of the first scraper is provided at the tip end portion on the screen plate side .
A plurality of the slits are provided at intervals in the width direction of the first scraper.
The portion of the first scraper between the slits adjacent to each other in the width direction is inclined with respect to the direction orthogonal to the paste coat direction in the plan view of the first scraper.
Screen printing device. With multiple scrapers to coat the paste on the screen plate,
A squeegee that is located in front of the plurality of scrapers in the paste coating direction, which is the direction in which the paste is coated on the screen plate, presses the screen plate against the printed matter, and prints the paste on the printed matter.
In a screen printing device with
The plurality of scrapers have a first scraper that stirs the paste on the screen plate and a second scraper that spreads the paste onto the screen plate.
The first scraper and the second scraper are arranged side by side at intervals so that the first scraper is in front of the second scraper in the paste coat direction.
In the first scraper, a slit extending in the height direction of the first scraper is provided at the tip end portion on the screen plate side .
The screen printing device has a plurality of the first scrapers.
In the paste coat direction, the plurality of first scrapers are arranged side by side so as to be in front of the second scraper.
The position in the width direction of the slit of the first scraper in front of the paste coat direction and the position in the width direction of the slit of the first scraper behind the paste coat direction are different from each other.
Screen printing device. In a screen printing device with multiple scrapers that coat the paste on the screen plate.
The plurality of scrapers have a plurality of first scrapers for stirring the paste on the screen plate and a second scraper for spreading the paste onto the screen plate.
The first scraper and the second scraper are arranged side by side at intervals so that the first scraper is in front of the second scraper in the paste coating direction, which is the direction in which the paste is coated on the screen plate. Being done
In the first scraper, a plurality of slits extending in the height direction of the first scraper are provided at the tip end portion on the screen plate side at intervals in the width direction of the first scraper.
In the paste coat direction, the plurality of first scrapers are arranged side by side so as to be in front of the second scraper.
The position in the width direction of the slit of the first scraper in front of the paste coat direction and the position in the width direction of the slit of the first scraper behind the paste coat direction are different from each other.
The portion of each of the plurality of first scrapers between the slits adjacent to each other in the width direction is inclined with respect to the direction orthogonal to the paste coat direction in the plan view of the first scraper.
The inclined direction of the portion between the slits adjacent to each other in the width direction in the first scraper in front of the paste coat direction, and the slits adjacent to each other in the width direction in the first scraper behind the paste coat direction. A screen printing device in which the tilting direction of the part between them is opposite.

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