JP3990233B2 - Production method of screen printing plate - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a screen printing plate capable of producing a screen printing plate without using a photographic film original plate by printing an image directly on a screen using an ink jet printer. The present invention also relates to an inkjet printer used for printing an image directly on a screen in order to produce a screen printing plate.
[0002]
[Prior art]
In general, a screen printing plate is manufactured as follows. First, a screen is stretched on a rectangular frame, and a photosensitive resin is applied to the back surface of the screen to form a photosensitive resin layer. Next, a negative or positive type photographic film is brought into close contact with the surface of the screen, and exposure and development are performed. Thereby, the screen printing plate in which the printed image is transferred to the photosensitive resin layer is obtained.
[0003]
However, the production of a photographic negative-type or positive-type film original requires many steps and is expensive. In the exposure step, the cost for the equipment for holding the film original plate in close contact with the surface of the screen is also high. In order to solve such a problem, there is provided a method for producing a screen printing plate that uses an ink jet printer to print an image directly on the surface of the screen, thereby omitting the production of the film original plate and eliminating the need for the adhesion process. Proposed.
[0004]
[Problems to be solved by the invention]
Here, the four peripheral portions of the screen stretched on the rectangular frame are fixed to the frame in a state where the screen is pulled with a large tensile force so that the central portion does not bend. However, the center portion of the screen is bent to some extent, and the amount of bending is particularly remarkable in the case of a large screen.
[0005]
When printing using an ink jet printer, it is important to maintain a constant distance between the ink jet head and the surface to be printed in order to form a highly accurate image. As described above, since the central portion of the screen stretched on the mold is bent, when printing an image on the surface of the screen using an ink jet printer, the space between the central portion and the ink jet head is increased. There is a possibility that distortion or the like may occur in the printed image in the central portion.
[0006]
In view of such problems, an object of the present invention is to propose a method for producing a screen printing plate capable of accurately printing an image on a screen surface using an ink jet printer.
[0007]
Another object of the present invention is to propose an ink jet printer for screen printing plate making which can accurately print an image on the screen surface.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, a method for producing a screen printing plate of the present invention includes:
Prepare a screen plate with a rectangular frame, a screen stretched on this frame and a photosensitive resin layer formed on one side of this screen,
Place this screen plate on a flat surface,
In order to prevent the screen from sagging, at least one support plate is sandwiched between the screen and the mounting surface.
In this state, using an ink jet printer on the surface of the screen, print an image with light-shielding ink,
The photosensitive resin layer is exposed from the side of the screen on which the image is formed, and the image is transferred to the photosensitive resin layer.
[0009]
Further, the present invention is an ink jet printer used in the above method for producing a screen printing plate,
A mounting table on which the screen plate is placed;
In an upper position of the mounting table, an inkjet head in which the nozzle surface is disposed in a downward state,
And at least one support plate having substantially the same thickness as the frame of the screen plate,
The support plate is disposed in the frame of the screen plate placed on the mounting table, and the screen is supported by the surface of the support plate.
[0010]
In the present invention, since the screen stretched on the frame is supported by the support plate, the screen is held in a flat state without bending. Therefore, since the distance between the screen surface and the inkjet head of the inkjet printer can be kept constant, an image can be printed on the screen surface with high accuracy.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an ink jet printer used for manufacturing a screen printing plate to which the present invention is applied will be described with reference to the drawings.
[0012]
FIG. 1A is a perspective view showing the overall configuration of the ink jet printer of this example, and FIG. 1B is a schematic cross-sectional view of a portion cut along the line bb. As shown in these drawings, the inkjet printer 1 of this example includes a rectangular apparatus base 2, a vertically long mounting plate 3 that is horizontally disposed on the upper surface, and the apparatus base 2 in the longitudinal direction of the printer (Y direction). ) And a traveling frame 4 supported in a reciprocable manner and an inkjet head 5 attached to the traveling frame 4. The inkjet head 5 is mounted on the carriage 6 so that the ink nozzle surface 5a faces downward. The carriage 6 can reciprocate in the X direction along a guide shaft 7 spanned in the printer width direction (X direction).
[0013]
The traveling frame 4 is provided with traveling rails 11 and 12 below the left and right end plate portions. These traveling rails 11 and 12 are connected to traveling guides 13 and 14 formed on the left and right end surfaces of the device mount 2, respectively. It can slide along. A linear motor 15 is attached to the apparatus base 2, and the traveling frame 4 reciprocates in the Y direction by the linear motor 15. A carriage motor (not shown) is mounted on the top plate side portion of the traveling frame 4, and the carriage 6, and hence the inkjet head 5, reciprocates in the X direction by this carriage motor.
[0014]
The top plate portion 16 of the traveling frame 4 that supports the carriage 6 is attached to the upper portions 17 and 18 of the left and right end plate portions so as to be movable up and down. By raising and lowering the top plate portion 16, the distance between the ink nozzle surface 5 a of the inkjet head 5 mounted on the carriage 6 and the surface (mounting surface) 3 a of the mounting plate 3 can be adjusted.
[0015]
The mounting plate 3 is supported by the device mount 2 in an adjustable state so that the mounting surface 3a is horizontal. A screen plate 20 having a configuration in which a screen 22 is stretched on a rectangular frame 21 is placed on the placement surface 3a. In this state, it is possible to print an image on the surface 22a of the screen 22 while moving the traveling frame 4 in the Y direction and moving the inkjet head 5 in the X direction by the carriage 6.
[0016]
FIG. 2 shows an enlarged view of the screen plate 20 placed on the mounting surface 3a. As can be seen from this figure, the screen plate 20 has a screen 22 stretched on one end surface 21a of a frame 21 made of aluminum or the like having a predetermined thickness H, and the screen plate 20 has substantially H between the screen 22 and the mounting surface 3a. There is an interval.
[0017]
Here, the inkjet printer 1 of this example includes a plurality of support plates 30 (1), 30 (2)... 30 (n) (in the drawing, two support plates 30 (1), 30 (2) only.) These support plates 30 (1) and 30 (2) have the same thickness H as the mold 21, and their width and length are various dimensions. The illustrated support plates 30 (1) and 30 (2) have a length dimension that fits within the frame of the screen frame 20. Further, the total dimension of these widths is just the dimension that fits within the frame of the screen frame 20.
[0018]
A procedure for printing an image on the screen plate 20 using the ink jet printer 1 of this example configured as described above will be described. First, after adjusting the mounting surface 3a of the mounting plate 3 to be horizontal, the two support plates 30 (1) and 30 (2) are aligned with the position on the mounting surface 3a where the screen plate 20 is placed. ) Are placed side by side.
[0019]
Next, the screen plate 20 is placed on the placement surface 3a so that the support plates 30 (1) and 30 (2) are contained in the frame. As a result, the screen 22 of the screen plate 20 is originally in a state where its central portion is bent as shown by an imaginary line in FIG. 2, but depending on the surfaces of the support plates 30 (1) and 30 (2). The screen 22 is supported horizontally. Therefore, the distance between the surface 22a of the screen 22 and the nozzle surface 5a of the inkjet head 5 can be kept constant.
[0020]
Thereafter, the traveling frame 3 and the carriage 6 are driven, and an image is printed on the surface 22 a of the screen 22 by the inkjet head 5.
[0021]
The screen plate 20 after the image layer 24 is formed in this way is exposed from the front surface 22 a side of the screen 22, and the photosensitive resin layer 23 previously formed on the back surface of the screen 22. Transfer the image to. Since the exposed portion in the photosensitive resin layer 23 is cured and the unexposed portion remains in an uncured state, after exposure, the unexposed portion is dissolved by spraying water, an alkaline solution, or an acid solution onto the photosensitive resin. Removed. By such development, a screen printing plate having a printed image transferred thereon can be obtained.
[0022]
In this example, the screen 22 of the screen plate 20 is supported by using two support plates 30 (1) and 30 (2). However, the screen 22 is supported by one support plate or three or more support plates. May be supported. The shape of the support plate may be a shape other than a rectangle.
[0023]
【The invention's effect】
As described above, in the present invention, the screen plate is placed on the placement surface so that the support plate placed on the placement surface in the ink jet printer fits in the frame, and an image is printed on the screen surface by the ink jet head. I have to. Therefore, the screen stretched on the frame is supported by the surface of the support plate and is held in a state without bending. Accordingly, since the distance from the inkjet head is kept constant, an image can be printed on the screen surface with high accuracy.
[Brief description of the drawings]
FIG. 1A is a perspective view showing an overall configuration of an ink jet printer of this example, and FIG. 1B is a schematic sectional view of a portion cut along a line bb.
FIG. 2 is an enlarged cross-sectional view showing an enlarged screen plate placed on the mounting surface in FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Inkjet printer 2 Apparatus mount 3 Mounting base 3a Mounting surface 4 Traveling frame 5 Inkjet head 5a Nozzle surface 6 Carriage 20 Screen plate 21 Form frame 22 Screen 23 Photosensitive resin layer 24 Image layer 30 (1), 30 (2) Support Board

Claims (1)

Rectangular frame, a screen plate is prepared having a photosensitive resin layer formed on one surface of the screen and the screen stretched in this frame,
As a support plate having the same thickness as the frame and having a length that fits in the frame, a plurality of sheets each having a different width and length are prepared,
The screen plate is placed on a flat placement surface so that the surface of the screen on which the photosensitive resin layer is not formed faces upward ,
In order to prevent the screen from sagging , at least one support plate is sandwiched between the screen and the mounting surface in the frame of the screen plate,
In this state, an image is printed with a light-shielding ink on the surface of the screen where the photosensitive resin layer is not formed , using an inkjet printer,
A method for producing a screen printing plate, wherein the photosensitive resin layer is exposed from the side of the screen on which the image is formed, and the image is transferred to the photosensitive resin layer.

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