JPH11235806A - Method for controlling plate release in screen process printing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make plate release good in screen process printing and to perform highly accurate printing. SOLUTION: An adsorbing body 7 consisting of an elastic body wherein there exist a number of though-holes 8 on the plate face and air in its inside can be sucked through an air pump P is placed on the top face of a screen plate 5 on which a squeegee device is moved. It is possible thereby that after screen process printing is finished, the absorbing body 7 is lowered and is adsorbed on the screen plate 5 and plate release is performed by moving vertically upward while it is appropriately finely vibrated by means of a vibration generator 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate separation control method and apparatus in screen printing, and more particularly to a plate separation control in screen printing that enables high-precision printing.

[0002]

2. Description of the Related Art In screen printing, two screens of a squeegee device are arranged by placing a screen plate on a printed material such as a printed circuit board, fixing the screen plate, and moving the squeegee device in one direction on the upper surface of the screen plate. A printing material such as ink is ejected from between the blades and is placed on the printing object through a pattern hole formed in the screen by the blade,
Thereafter, when the screen plate is peeled off, a pattern is formed on the substrate.

However, it is well known in the art that in order to obtain high-precision screen printing, a so-called separation operation of separating a screen plate from a printing substrate is important. That is, the printing material pressed into the pattern holes of the screen plate through the squeegee device is still in a soft state without being sufficiently solidified in the pattern holes. This is because the printing material well placed on the upper surface of the printed material is also kicked or scraped by the inner edge of the pattern hole, so that the pattern mounted on the upper surface of the printing material changes. Therefore,
It goes without saying that separation of plates requires careful work.

Conventionally, the separation of the screen plate is performed by lifting one side of the screen plate from the starting point side to the end point side of the screen plate after the squeegee device has moved the screen plate. And Originally, it is desirable to peel off the screen plate by lifting it vertically to the printing material, but since the screen plate itself is made of a thin metal plate, etc., the periphery is surrounded by a frame. Even if the frame is lifted horizontally, it is actually the case that the central portion of the screen plate hangs down from the peripheral portion of the frame, so that the result is the same as described above. Furthermore, even if the frame is lifted horizontally, the screen plate itself has elasticity,
Since the central portion of the screen plate hangs down and is finally peeled off, the central portion distant from the printing material jumps up, so that the entire screen plate flaps, and is kicked or scraped at the inner edge of the pattern hole as described above. Needless to say, the printing material placed on the screen plate falls on the printing material, so that it is actually impossible to lift the frame horizontally.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to separate the screen plate from the printing substrate while separating the screen plate at an oblique angle with respect to the printing material as described above. It is an object of the present invention to solve the problem that a printing material in a pattern hole of a plate is kicked or scraped by an inner edge of the pattern hole.

Further, after the squeegee device has finished moving, the printing material in the pattern holes starts to harden and tends to adhere to the inner peripheral wall of the pattern holes. An object of the present invention is to prevent a phenomenon that a pattern is thinned by the amount attached to the inner peripheral wall.

Further, when the pattern hole of the screen plate is smaller than the thickness of the screen plate, the printing material pressed into the pattern hole stops in the pattern hole when the plate is separated, and together with the screen plate, the printing material is removed from the printing substrate. An object of the present invention is to solve the problem that screen printing is sometimes impossible due to peeling.

Also, regardless of the size of the pattern holes in the screen plate, when the integration density is high, there is a problem that the plate separation becomes difficult.

Accordingly, the present invention provides a plate separation control method and apparatus capable of performing excellent screen separation and enabling screen printing with high printing accuracy.

[0010]

SUMMARY OF THE INVENTION According to the present invention, there is provided a method for controlling separation of a screen in screen printing, comprising the steps of: It is placed on the upper surface of the plate, and the adsorbent is vibrated appropriately and finely, and the adsorbent is moved upward while sucking the screen plate to be vertically separated from the printing material together with the screen plate.

After the squeegee device has moved the upper surface of the screen plate, printing is performed, and an adsorbent that can be sucked in contact with the screen plate is placed on the upper surface of the screen plate. It is characterized in that the air is blown upward between the screen plate and the printing medium while being moved upward and vertically separated from the printing medium together with the screen printing plate.

In the above-described method of controlling the separation of a printing plate in screen printing, a rough surface is formed on the upper surface of the printing plate with which the screen printing plate comes into contact, and an air layer is formed between the screen printing plate and the printing plate during separation of the screen printing plate. Is formed.

Further, the plate separation control device for screen printing according to the present invention is characterized in that an adsorbing member which sucks in contact with the upper surface of the screen plate is arranged so as to be movable up and down toward the screen plate. And the adsorbent has an air suction device for sucking air from a perforation formed in a board made of an elastic body having at least the same shape or a similar shape as the screen plate, and an exciter that generates fine vibration. It is characterized by having.

The adsorbent is supported by a frame having at least the same or similar shape as the screen plate so as to hang down at four corners thereof so that the position thereof can be adjusted, and the lower end opening thereof can contact the screen plate. A wrapper tube is provided, and the wrapper tube is connected to an air suction device.

Further, the adsorbent has an air suction device for sucking air from a perforation formed in a board surface made of an elastic body having at least the same or similar shape as the screen plate, and generates fine vibrations. Characterized in that it has a vibrator, and in addition, the adsorbent body is supported at least at the four corners by a frame body having the same or similar shape as the screen plate so as to be adjustable downward and has a lower end opening. Is provided with a wrapper tube capable of contacting the screen plate, wherein the wrapper tube is connected to an air suction device, and air supply ports are provided at at least four corners of the screen plate, and the adsorbent is a screen. Air can be blown into the air supply ports from the air supply device when the screen plate is separated from the plate, and comes into contact with the printing material of the screen plate. Characterized in that the surface is a rough surface, grooves are formed vertically and horizontally at positions avoiding the pattern holes on the lower surface of the screen plate in contact with the printing material, and a frame body for holding the screen plate An air supply pipe is connected to the screen plate, and the air supply pipe is arranged so that air discharged from the air supply pipe can enter a groove formed on a lower surface of the screen plate at a contact surface with the printing material. On the lower surface in contact with the printed material, a plurality of strips having a predetermined thickness are stretched vertically or horizontally at positions avoiding the pattern holes, and the lower surface of the screen plate in contact with the printing material has pattern holes. A plurality of protrusions having a predetermined thickness are formed vertically or horizontally integrally at a position avoiding, and the band or the protrusion is separated from the inner edge of the pattern hole by a predetermined distance. Features and screen version Forming a groove in a matrix so as to avoid the pattern rests portion on the upper surface of the substrate in the part,
An air supply pipe is connected to a frame holding the screen plate or a base on which the screen plate is placed, and the air supply pipe is arranged so that air discharged therefrom can enter the groove of the printing material. A groove is formed vertically and horizontally on the upper surface of the printing material at the lower portion of the screen plate, avoiding the pattern mounting portion, so that air can enter the groove when the plate is separated. A groove is formed vertically and horizontally on the upper surface avoiding the pattern mounting portion, an air supply pipe is connected to a frame holding the screen plate or a base on which the screen plate is mounted, and the air supply pipe is discharged from the air supply pipe. Is arranged so as to be able to enter the groove of the printing material, and provided on the upper surface of the printing material at the lower part of the screen plate, provided with a recess for forming a step between the pattern mounting portions, There characterized by being in contact with the pattern rests unit.

Therefore, when the plate is released after screen printing, first, the surface of the printing material in the pattern hole is smoothly separated from the inner peripheral wall of the pattern hole by vibration, and the adsorbent adsorbs the screen plate. By raising vertically and parallel to the substrate, even if the frame is lifted horizontally, drooping and flapping at the center of the screen plate will be resolved and ideal plate separation will be performed. , High-precision printing becomes possible.

Further, when separating the plate after screen printing,
While the adsorbent adsorbs the screen plate and rises in parallel with the printing material and vertically, the air is blown between the screen plate and the printing material, so that the frame is lifted horizontally even if the frame is lifted horizontally. There is no sagging in the center of the plate,
In addition, when dripping is attempted, the blown air lifts up the center, and the air flow improves the cutting of the printing material, which results in ideal separation of the printing plate, enabling high-precision printing. Become.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG.
The receiving base 3 is disposed in the concave portion 1a provided on the base 1, and a printed material 4 such as an electronic substrate is placed on the receiving base 3 and the upper surface thereof is supported at the same height as the flat surface of the base 1. A screen plate 5 having a pattern hole 6 such as a pattern to be printed on the upper surface is arranged so as to be able to move up and down, and an adsorbent 7 is supported by a support plate 11 toward the screen plate 5 placed on the upper surface of the printing substrate 4.
It is arranged to be able to move up and down. The receiving table 3 can push up the screen plate 5 upward from the concave portion 1a by the push-up bar 2 reciprocating in the axial direction.
Can be taken from

The adsorbing body 7 suspended and supported integrally with the support plate 11 is formed in a housing having an upper opening by an elastic body such as rubber.
A plurality of through-holes 8 are formed in the same area, and an electrically driven oscillator 9 such as an ultrasonic vibration element is fixedly provided in the housing. A suction hole 12 is formed in the support plate 11 that closes an upper opening of the suction body 7 having a hollow housing, and a suction pipe 13 is connected to the suction hole 12. The suction pipe 13 is an appropriate communication pipe and is an air pump P
It is connected to the. Therefore, when the air pump P is driven, the air in the adsorbent 7 is sucked through the suction pipe 13,
Since the outside air is sucked from the through holes 8, the bottom plate has an attraction force.

Therefore, as shown in FIG. 2, the screen plate 5 is lowered and overlapped on the upper surface of the printing material 4, and the squeegee blade 1 made of two thin plates contacting the screen plate 5.
The printing material 17 stored in the tank 14 is supplied between 5, 5 and 16 and the side plates 18 arranged at both ends thereof, and the squeegee device 19 moves from right to left as shown by the arrow A. After the printing material 17 is inserted into the pattern hole 6, the squeegee device 19 is removed from the screen plate 5, the support plate 11 is lowered as shown by arrow B, and the adsorbent 7 is screened as shown in FIG. Touch plate 5. In this case, the air pump P is operated so that the outside air can be sucked from the through hole 8 of the adsorbent 7.

Therefore, when the adsorbent 7 comes into contact with the screen plate 5, it can be adsorbed on the upper surface of the screen plate 5, and the screen plate 5 can be lifted upward. Then, as shown by an arrow C in FIG. 4, when the support plate 11 is moved upward in parallel from the printing substrate 4, the adsorbent 7 moves upward together with the screen plate 5 being adsorbed.

At this time, the exciter 9 is operated to move the adsorbent 7
By applying a minute vibration to the bottom of the printing material 4, the inner peripheral edge of the pattern hole 6 of the printing material 17 in the pattern hole 6 on the upper surface of the printing substrate 4 vibrates. Divergence action is promoted. The vibration of the adsorbent 7 by the vibrator 9 may be omitted when the opening of the pattern hole 6 is larger than the thickness of the screen plate 5. Also,
It is also possible to move the base 1 vertically downward while the adsorbent 7 stands still while the screen plate 5 is adsorbed.
Therefore, the base 1 is provided so as to be able to move up and down by an appropriate lifting device.

Thus, the separation of the screen plate 5 can be performed without causing the center portion of the screen plate 5 to sag, without causing the entire surface to bend, and without causing fluttering, while the adsorbent 7 vibrates finely. Or, do not vibrate,
It can be peeled vertically upward from the upper surface of the printing substrate 4, or the printing substrate can move vertically downward from the lower surface of the screen plate. Therefore, the printing material 1 placed on the upper surface of the printing material 4 in the pattern holes 6 of the screen plate 5
Reference numeral 7 indicates that the plate can be released without being kicked or shaved by the inner edge of the pattern hole 6.

In the above embodiment, the adsorbent 7
It is important that the through holes 8 are formed so as to avoid the pattern holes 6 of the screen plate 5. Therefore, the adsorbent 7 is not a trivial one but a pair of holes adapted to a specific screen plate 5. Created. For this reason, the adsorbent 7 is a housing that can be attached to and detached from the support plate 11 by the suction force of the air pump P. However, the adsorber 7 is formed of a plate-shaped elastic plate that forms the lower opening of the housing and closes the lower opening. Needless to say, a through-hole 8 may be appropriately formed in the board surface.

Further, as another embodiment of the present invention,
As shown in FIG. 5, an air inlet 20 extending from the upper surface to the lower surface of the screen plate 5 is provided, and
And the air pipe 21 is connected to the air pump P1. The air pump P1 is a pump that can supply air to the air pipe 21 unlike the air pump P, but it is convenient if the air pump P can be used for both purposes. If the screen plate 5 has a square shape, the air blowing ports 20 are preferably provided near the four corners. The air pipe 21 may be supported by the support plate 11, penetrate the adsorbent 7, and may be configured to be detachable so that the tip thereof can be in contact with or separated from the air blowing port 20.

Therefore, when the screen plate is released from the screen plate 5 by the adsorbent 7 as described above,
Air is supplied to the air pipe 21 by the air pump P1, and air is sent between the screen plate 5 and the printing material 4 from the air inlet 20 to float the screen printing plate 5 from the printing material 4, and to remove the adsorbent 7 in the same manner as described above. Let it rise. In this case, if the integration density of the pattern holes 6 formed in the screen plate 5 is high, the printing material 17 mounted on the printing substrate 4 will be agitated by the air flow, and the printing accuracy will be reduced, which is the opposite effect. So the pattern hole 6
Is effective in the case where the integration density is relatively low. Thus, when the integration density is low, the air flow has the effect of improving the cutting of the printing material. In this embodiment, vibration may be generated by the vibrator 9 in the same manner as in the previous embodiment.

Further, the adsorbent 7 in the previous example is a housing-like elastic body in which perforations are perforated on the board surface, but as shown in FIGS. 6 to 9, at least a frame 30 having the same shape or similar shape as the screen plate 5. In addition, a trumpet-shaped trumpet tube 31 is provided at its four corners, which is suspended downward so as to be adjustable in position, and whose lower end opening can contact the screen plate 5. This trumpet tube 31 is connected to an air suction device 32. The adsorbent 7a may be formed as follows. The frame 30 is arranged so as to be able to move up and down toward the screen plate 5 like the support plate 11.

The frame 30 is, as shown in FIGS.
An elongated box-shaped guide frame 33 is fixed to the inner peripheral surface at both ends of the four sides of the square at a level different from that of the adjacent side, and rollers 34 are rotatably supported at both ends in the guide frame 33, respectively. A guide belt 35 is endlessly looped between these rollers 34, 34, and an angle-shaped plate 36 is connected to the guide belt 35 so as to be able to reciprocate, and the plate 36 is composed of rods 37, 37.
a.

A slider 39 having guide tubes 38, 38a arranged orthogonally is provided on the rods 37, 37a so as to be loosely fitted and movable along the rods 37, 37a. The slider 39 has a substantially sector shape such as a quarter circle, and is connected to the guide tubes 38, 38a. The guide tubes 38, 38a are loosely fitted and connected to the rods 37, 37a arranged orthogonally. On the plate surface,
A wrapper tube 31 as shown in FIGS. 8 and 9 is fixed. An air pump P similar to the previous example is connected to the wrapper tube 31 via an appropriate air pipe 40.

Therefore, for example, the rod 3
7 and the vicinity of both ends, the rods 37 facing each other
, The plates 36, 36 rotate the guide belts 35, 35, and the rods 37 move through the guide tubes 38a, which are loosely fitted to the orthogonal rods 37a. 37a, and similarly,
The rods 37a facing each other at the approximate center or near both ends
The plates 36, 36 rotate the guide belts 35, 35 so that the rods 37a move through the guide tubes 38 which are loosely fitted to the rods 37 on the orthogonal side. 37, whereby the position of the slider 39 can be moved in a diagonal direction. This movement is appropriately adjusted to adjust the position of the wrapper tube 31, that is, the suction position of the screen plate 5. Can be adjusted.

As still another example, as shown in FIG. 10, wrapper tubes 41 similar to the wrapper tube 31 are implanted at four corners of the frame 40, and cutouts 42 are formed at the corners of the frame 40.
To form the adsorbent 7b wound around the goggle belt 43. As shown in FIG. 11, the adsorbent 7b is fixed to a support 51 for fixing the screen plate 5 to the upper surface of the frame 50 on which the screen plate 5 is stretched, and the suction cup at the lower end of the trumpet pipe 41 is appropriately fixed. The screen plate 5 is supported so as not to contact the screen plate 5. The wrapper tube 41 is connected to the air pump P via an appropriate pipe. On the other hand, a support member 54 in which a rod 52 for holding a substantially central portion of the screen plate 5 is rotatably connected with a shaft 53 is arranged so as to be able to move up and down by a lifting member 55. The elevating member 54 can move up and down in conjunction with the frame 50. Therefore, when the printing plate is separated after the screen printing is completed, the elevating member 53 is moved down to press the distal end portion 52a of the rod 52 against the upper surface of the screen printing plate 5, and then the four wrapper tubes 41 are simultaneously operated to operate the screen printing plate 5. Lift the four corners. Thereafter, when the frame body 50 is lifted upward, the elevating member 50 rises in conjunction therewith, and the center of the screen plate 5 is pressed by the rod 52 to prevent the screen plate 5 from jumping. . Note that the contact area of the tip 52a with the screen plate 5 is preferably as small as possible.

Further, in order to cope with the problem that when the integration density of the pattern holes 6 in the screen plate is high, the printing material 17 adheres to the inner wall of the pattern holes 6 and the printing material 4 and the separation of the plate becomes difficult. In addition to the form,
The contact surface (lower surface 5a) of the screen plate 5 that contacts the surface is formed in a rough surface such as satin finish between the pattern holes 6.
That is, the pattern holes 6 may be formed in the screen plate 5 in which the lower surface 5a in contact with the print substrate 4 is formed with a rough surface.

This rough surface can be obtained by adding the matte finish as shown in FIG.
As shown in FIGS. 2 and 13, grooves 60 such as V-grooves are formed vertically or horizontally or randomly on the lower surface 5 a of the screen plate 5, avoiding the pattern holes 6. Furthermore, by blowing air into these rough surfaces or grooves 60,
The separation between the printing substrate 4 and the screen plate 5 is promoted. That is, as shown in FIG.
An air supply pipe 62 is connected to a frame 61 surrounding the frame body 61, and the air supply pipe 62 is opened in cover bodies 63 and 64 such as an adhesive tape for connecting the four sides of the screen plate 5 to the inside of the frame body 61. A groove 60 formed in the lower surface 5a of the screen plate 5
Alternatively, it is arranged so that air is discharged toward the rough surface.

In addition to the above-mentioned satin or V-groove, the rough surface
As shown in FIG. 15 and FIG.
a, a plurality of strips 70 arranged vertically or horizontally avoiding the pattern holes 6;
Or integrally formed with the screen plate 5. This band 70 is applied to the screen plate 5 in which the pattern holes 6 are formed at regular intervals in parallel in the vertical or horizontal direction.
The pattern holes 6 are arranged so as to maintain a predetermined distance G from the inner peripheral edge thereof. Therefore, as shown in FIG. 17, the squeegee device 19 moves on the upper surface of the screen plate 5 placed on the printing material 4 to move the squeegee blades 15, 16 thereof.
When the printing material 17 is pushed into the pattern hole 6 from
The printing material 17 is placed on the upper surface of the printing material 4 in the shape of the pattern holes 6, and furthermore, spaces 71, 71 are formed around a certain area of the pattern 6 a. This has a great effect of preventing the bleeding of the print from being attached to the inner peripheral edge of the bottom (the side of the printing material 4).

The principle shown in FIGS. 12 to 14 can be applied to the printing substrate 4. That is, as shown in FIG. 18 and FIG. 19, grooves 80 are engraved vertically and horizontally on the upper surface 4a of the substrate 4 other than the portion where the pattern 6a is mounted, or a rough surface such as satin is formed. As shown in FIG. 20, an air supply pipe 62 is connected to a frame 61 surrounding the screen plate 5, and this air supply pipe 62 is connected to the four sides of the screen plate 5 inside the frame 61 by an adhesive tape. And the like, so that the grooves 8 formed in the upper surface 4a of the printing material 4
It is arranged so that air is discharged toward zero or a rough surface. On a printed board, for example, as the print substrate 4, patterns 6a for forming electronic circuits are regularly arranged at predetermined vertical and horizontal intervals, and the printed board is made of ceramic. It can be done very easily. In addition, the air supply pipe 62 is a frame body 61.
May be connected to an appropriate part such as the base 1 without connecting to the base. Further, as shown in FIG. 21, a plurality of print surfaces 4b, 4
When printing c, 4d, the print surfaces 4b,
A non-printing space 4g between the printed surfaces 4c, 4d is formed in a recess having a lowered height, and the printed surfaces 4b, 4c, 4d
Is formed on the periphery of the printing material 4 so as to surround the printing material 4, and when the screen plate 5 is separated from the upper surface of the printing material 4, the air enters into the non-printing space 4g. Is provided with an opening 4f. Print surface 4
In b, 4c, and 4d, grooves 80 similar to the above are formed in the vertical and horizontal directions.

[0036]

According to the present invention described above, the screen plate is not attracted by the adsorbent and bent downward when the plate is released, so that fluttering is prevented, and the screen plate is raised vertically while vibrating finely. As a result, the screen plate is separated from the printing material, so that the surface of the printing material in the pattern hole and the inner peripheral wall of the pattern hole are smoothly separated by minute vibration, and high-precision screen printing is performed. it can. In addition, air is blown between the screen plate and the printing medium to float the screen plate, and the air flow improves the cutting of the printing material, so that the screen plate can be separated with extremely high precision.

[Brief description of the drawings]

FIG. 1 is a conceptual cross-sectional front view of a plate separation control device according to the present invention.

FIG. 2 is a diagram illustrating the operation of a screen printing process.

FIG. 3 is a sectional front view showing an initial stage of a plate separating step after screen printing.

FIG. 4 is a cross-sectional front view showing the end of the plate separation process.

FIG. 5 is a sectional front view similar to FIG. 4, showing another embodiment of the present invention;

FIG. 6 is a perspective view showing another example of the adsorbent.

FIG. 7 is a sectional view taken along line AA of FIG. 6;

FIG. 8 is a perspective view of a trumpet tube.

FIG. 9 is a sectional view of a trumpet tube.

FIG. 10 is a perspective view showing still another example of the adsorbent.

FIG. 11 is a diagram illustrating the operation of the adsorbent shown in FIG.

FIG. 12 is a partial plan view of the lower surface of the screen plate.

13 is an enlarged cross-sectional view taken along line BB of FIG. 10;

FIG. 14 is a partially enlarged cross-sectional view showing the relationship between a screen and a frame holding the screen in a plate separation state.

FIG. 15 shows the lower surface of the screen plate (the contact surface with the substrate).
A plan view showing

16 is a sectional view taken along the line CC of FIG.

FIG. 17 is a sectional view showing a screen printing state by the screen plate of FIG. 15;

FIG. 18 is a partial plan view of the upper surface of a printing medium.

19 is a sectional view taken along line DD of FIG. 18;

FIG. 20 is a partially enlarged cross-sectional view showing a relationship between a printing material and a screen plate in a plate separation state.

FIG. 21 is a perspective view of a printing substrate having a plurality of divided printing surfaces.

[Explanation of symbols]

 P, P1 Air pump 1 Base 4 Print substrate 5 Screen plate 5a Lower surface 6 Pattern hole 7, 7a Adsorber 8 Through hole 9 Exciter 11 Support plate 12 Suction hole 13 Suction tube Reference Signs List 20 air inlet 21, 60 air pipe 30, 40 frame 31, 41 wrapper tube 32 air suction device 33 guide frame 34 roller 35 guide pulley 36 plate 37 rod 38 guide tube 39 Sliders 60 and 80 Groove 61 Frame 62 Air supply pipe 70 Band 71 Space

Claims (18)

[Claims] 1. After printing after the squeegee device finishes moving the upper surface of the screen plate, an adsorbent that can be sucked in contact with the screen plate is placed on the upper surface of the screen plate, and the adsorbent is finely vibrated, or A plate separation control method in screen printing, wherein the adsorbent is moved upward while sucking the screen plate without vibrating, and vertically separated from the printing material together with the screen plate. 2. After printing after the squeegee device has moved the upper surface of the screen plate, an adsorbent that can be sucked in contact with the screen plate is placed on the upper surface of the screen plate, and the adsorbent is finely vibrated, or A method for controlling separation of a plate in screen printing, characterized in that the adsorbent is stopped while the screen plate is sucked without being vibrated, and the printing object in contact with the lower surface of the screen plate is vertically separated downward. 3. After printing after the squeegee device has moved the upper surface of the screen plate, an adsorbent that can be sucked in contact with the screen plate is placed on the upper surface of the screen plate, and the adsorbent is finely vibrated. The screen printing characterized in that the adsorbent is moved upward while sucking the screen plate without vibrating, and vertically separated from the printing material together with the screen plate while blowing air between the screen plate and the printing material. Plate separation control method. 4. The method according to claim 1, wherein a rough surface is formed on an upper surface of the printing material with which the screen plate contacts, and an air layer is formed between the screen printing plate and the printing material when the screen printing plate separates. 4. The method for controlling plate separation in screen printing according to any one of items 1 to 3. 5. A plate separation control device for screen printing, wherein an adsorbent for sucking in contact with an upper surface of the screen plate is arranged so as to be able to move up and down toward the screen plate. 6. An adsorbent for sucking in contact with an upper surface of a screen plate is arranged so as to be able to move up and down toward the screen plate, and a base on which a printing material contacting the screen plate is placed is provided so as to be able to move up and down. A plate separation control device for screen printing characterized by the following. 7. The adsorbent has an air suction device for sucking air from a perforation formed at least on a board made of an elastic body having the same or similar shape to the screen plate, and generates fine vibrations. The plate separation control device for screen printing according to claim 4 or 5, further comprising an exciter. 8. The adsorbent is supported by a frame having at least the same or similar shape as the screen plate so as to hang downward at four corners thereof so that the position thereof can be adjusted, and the lower end opening can contact the screen plate. 8. The plate separation control device in screen printing according to claim 5, wherein a wrapper tube is provided, and the wrapper tube is connected to an air suction device. 9. An air supply port is provided at at least four corners of the screen plate, and air can be blown from the air supply device into the air supply port when the adsorbent is separated from the screen plate. Claim 5,
A plate separation control device in screen printing according to 6, 7, or 8. 10. The screen separation control apparatus in screen printing according to claim 5, wherein a lower surface of said screen plate in contact with a printing material is a rough surface. 11. The screen printing method according to claim 5, wherein grooves are formed vertically and horizontally at positions avoiding the pattern holes on a lower surface of the screen plate that comes into contact with the printing material. Plate release control device. 12. An air supply pipe is connected to a frame body holding the screen plate, and air discharged from the air supply pipe can enter a groove formed on a lower surface of the screen plate at a contact surface with a printing material. 12. An arrangement according to claim 11, wherein:
A plate separation control device for screen printing according to the above. 13. A plurality of strips having a predetermined thickness are stretched vertically or horizontally at positions avoiding the pattern holes on the lower surface of the screen plate which comes into contact with the printing material.
10. The plate separation control device in screen printing according to any one of items 9 to 9. 14. A plurality of projections having a predetermined thickness are integrally formed vertically or horizontally on a lower surface of the screen plate in contact with a printing material at positions avoiding the pattern holes. The plate separation control device for screen printing according to any one of claims 9 to 10. 15. The apparatus according to claim 13, wherein the band or the projection is separated from the inner edge of the pattern hole by a predetermined distance. 16. A screen according to claim 5, wherein a groove is formed vertically and horizontally on the upper surface of the printing material at a lower portion of the screen plate, avoiding the pattern mounting portion, so that air can enter the groove when the plate is separated. The plate separation control device for screen printing according to any one of claims 9 to 10. 17. A groove is formed vertically and horizontally on the upper surface of a printing material at a lower portion of the screen plate, avoiding a pattern mounting portion, and an air supply pipe is provided on a frame for holding the screen plate or a base on which the screen plate is mounted. 10. The apparatus according to claim 5, wherein the air supply pipe is connected to the air supply pipe so that air discharged from the air supply pipe can enter the groove of the printing medium. 18. A method according to claim 18, wherein a recess for forming a step between the pattern mounting portions is provided on an upper surface of the printing material at a lower portion of the screen plate, so that the screen plate contacts the pattern mounting portion. A plate separation control device for screen printing according to any one of claims 5 to 9.