JPH06218902A - Ink supply device for intaglio printing machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an ink supply device that can safely and reliably recover ink that has been supplied to the platen plate of an intaglio printing machine and then rubbed by a doctor device and removed outside the screen area. To do. [Structure] An ink fountain 13 and rotating roll groups 11, 12 for supplying ink to the plate surface from the ink fountain 13 are received, and the rotating roll groups 11, 12 receive the ink outside the above-mentioned screen area as the roller rolls rotate. And return it to the ink fountain.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supplies printing ink to a plate-shaped intaglio plate having a concave portion forming an image area in a screen area,
The ink supply device of the intaglio printing machine for removing the printing ink in the screen area other than the concave portion to the outside of the screen area by the doctor device and transferring the printing ink selectively remaining in the concave portion to the object to be printed for printing. With regard to the above, it is used, for example, in manufacturing a color filter by printing a transparent coloring ink in a pixel pattern on a glass substrate. In particular, the present invention is an ink that can collect the printing ink removed from the screen area by the doctor device in the printing process in the printing process and prevent the printing ink from being collected outside the screen area and can reuse the printing ink. Regarding the feeding device.

[0002]

2. Description of the Related Art Since a substrate used for a color filter is a transparent and rigid substrate such as a glass plate, when a transparent colored ink is printed in a pixel pattern on the substrate to manufacture a color filter. Generally, intaglio offset printing capable of elastically pressing the ink on the transparent rigid substrate is used.

This printing process will be described with reference to FIGS. 13 to 19. First, the printing ink k is manually supplied to the plate surface of the intaglio plate e by a printing operator using a spatula or the like (FIG. 1).
3). Then, the plate surface is smoothed with a squeegee i, and the supplied printing ink k is filled in the concave portion (FIG. 14). Then, the screen area is rubbed with a doctor device j to remove the printing ink in the screen area from outside the screen area. The ink is removed from the ink receiver h (FIG. 15). At this time, since the printing ink k2 filled in the concave portion by the squeegee i is not removed by the doctor device j, the printing ink k2 filled in the concave portion selectively remains in the screen area and is not filled in the concave portion. The printing ink k1 is removed outside the screen area.
By this operation, the printing ink is patterned within this screen area.

Next, the elastic blanket b coated on the peripheral surface of the metal roll a is pressed against the screen area provided with the patterned printing ink k2, and the printing ink k2 is transferred onto this blanket b ( (Fig. 16). Then, the blanket b is separated from the plate surface, and the next printing ink k is supplied to the plate surface by the squeegee i (FIG. 17). The elastic blanket b is subsequently pressed against the printing material c, and the printing ink k2 is transferred to the printing material c again (FIG. 18). Finally, the printing material c is ejected from the printing machine, and the printing of this one printing material c is completed (FIG. 19).

In FIGS. 13 to 19, d is a surface plate for a printing medium, f is a plate surface plate, and g is a surface plate d for printing material and a plate surface f.
It is a carriage that supports and reciprocates these between the ink supply portion and the blanket portion.

[0006]

In such a conventional method, since the spread of the ink is uneven in smoothing the ink by the squeegee, the printing operator corrects the spread by using a spatula or the like. For this reason, the amount of printing ink supplied fluctuates at the discretion of the printing operator, and an excessive amount of printing ink tends to be supplied. Since the excessively supplied printing ink is piled up high on the ink receiver h, the printing ink piled up is scraped by a spatula or the like to the screen area for reuse.

However, when printing a large number of sheets in succession, the work of supplying printing ink to these plate surfaces, the work of adjusting the spread of ink by a squeegee,
Alternatively, since the work of drawing excess printing ink from the ink receiver h outside the screen area to the screen area needs to be performed during the printing process, improvement has been required in terms of safety.

The present invention has been made in view of such a problem. That is, the printing ink removed outside the screen area is safely and surely collected during the printing process and printed outside the screen area. An object of the present invention is to provide an ink supply device capable of reusing ink without accumulating it.

[0009]

That is, according to the present invention, there is provided a flat plate intaglio having a concave portion forming an image area in a screen area,
Ink supply means for supplying the printing ink onto the plate surface of the intaglio plate, a doctor device for rubbing the plate surface supplied with the printing ink to remove the printing ink in the screen area other than the recesses to the outside of the screen area, and this doctor device The ink fountain of the printing ink and the ink fountain in the ink supply means of the intaglio printing machine, which comprises a printing ink transfer means for transferring the printing ink rubbed by the ink and selectively remaining in the recesses onto the printing medium. And a rotary roll group disposed between the plate surface of the intaglio plate, and the rotary roll group receives the printing ink from the ink fountain with its rotation and supplies it to the plate surface of the intaglio plate and the screen of the plate surface. It is characterized in that the printing ink that has been excluded from the area is received and returned to the ink fountain.

[0010]

According to the present invention, the printing ink is supplied to the plate surface of the intaglio according to the rotation of the rotating roll group, and the printing ink which has been removed outside the screen area due to the rotation is collected. The printing ink outside the area can be collected during the printing process, and the collected printing ink is returned to the ink fountain, so that it can be reused for the next printing as it is.

Further, since the supply of the printing ink to the plate surface and the collection of the printing ink outside the screen area are performed by the rotation of the rotary roll group, the safety of the operator is completely ensured.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. That is, as shown in FIG. 1, an intaglio printing machine provided with an ink supply device according to the present invention supports a cylinder 1, an elastic blanket 2 covering the circumference of the cylinder 1, a material to be printed 3, and the material to be printed 3. Surface plate 4 for printing material, intaglio plate for printing 5, plate surface plate 6 for supporting this intaglio plate for printing 5, supporting these surface plate 4 for printing material and plate surface plate 6, and supplying these to ink supply part and blanket part A dolly 7 for reciprocating movement between the dolly, a doctor device 9, an ink receiver 8 for receiving the printing ink removed from the screen area by the doctor device 9, and an ink supply device 10 for supplying the printing ink 14 to the plate surface of the intaglio plate 5. Its main part is composed of and.

The plate surface of the printing intaglio plate 5 is provided with recesses having the same pattern as the red pixel pattern of the color filter used in the color display liquid crystal display, and the printing ink 14 supplied to the plate surface is This recess is filled.

Further, the ink supply device 10 includes an ink fountain 13 having a slit for supplying ink in the lateral direction, a first rotary roll 11 arranged at a position substantially in contact with the slit for supplying ink, and the first rotary roll 11. The first rotating roll 11 is disposed so as to be substantially in contact with the rotating roll 11, and is configured to include a second rotating roll 12 that rotates in the opposite direction to the surrounding fragrance. Then, the printing ink 14 is called from the ink fountain 13 as the first rotating roll 11 rotates, and adheres to the peripheral surface of the first rotating roll 11. Next, the printing ink 1 is transferred from the first rotary roll 11 to the second rotary roll 12.
4 is transferred, and finally the printing ink 14 is transferred to the plate surface of the intaglio plate 5. The supply amount of the printing ink 14 to the plate surface can be adjusted by the opening of the ink supply slit, the rotation speed (peripheral speed) of the roll, the moving speed of the plate, and the like.
Further, when the printing ink 14 is supplied to the plate surface, the second rotating roll 12 exists at a position where it is substantially in contact with the plate surface,
The carriage 7 is moved in the direction opposite to the rotation direction of the second rotation roll 14 so that the printing ink 14 is uniformly attached to the plate surface. On the other hand, when the printing ink 14 is not supplied, the second rotary roll 12 moves upward away from the plate surface and stands by at a position where the second rotary roll 12 does not contact the plate surface.

Next, the operation of this printing machine will be described.
That is, as shown in FIG. 1, after the printing ink 14 is supplied to the plate surface of the intaglio plate 5, the second rotating roll 12 moves upward to leave the plate surface (FIG. 2), and the doctor device 9 descends to drop the plate surface. To contact. Then, the doctor device 9 rubs the screen area of the plate surface by the movement of the carriage 7 to sufficiently fill the concave portion of the intaglio 5 with the printing ink 14, and to receive the excess printing ink 14 not filled in the concave portion outside the screen area. 8 (Fig. 3). 4A is a plan view showing the shape of the printing ink 14 thus removed, FIG.
(B) shows a cross-sectional view thereof, in which 14a is an ink receiver 8
The printing ink excluded above. As is clear from the figure, the printing ink 14a is piled up on the ink receiver 8.

Next, the carriage 7 moves in the opposite direction and the cylinder 1 descends, the elastic blanket 2 contacts the plate surface and presses the plate surface. And this dolly 7
The peripheral surface of the cylinder 1 rotates at the same speed as the moving speed of the carriage 1. Therefore, as the carriage 5 moves, the printing ink 14 filled in the concave portions of the intaglio plate 5 does not change its pattern shape on the blanket 2. (Fig. 5).

Printing ink 14 filled in the recesses of the intaglio plate 5.
When is transferred onto the blanket 2, the cylinder 1 rises and leaves the plate surface, and the carriage 7 starts moving in the opposite direction. Then, the second rotary roll 12 descends again and substantially contacts the plate surface, and the supply of the printing ink 14 to the plate surface is started (FIG. 6).

At this time, the second rotating roll 12 is provided with the excess printing ink 14a raised on the ink receiver 8.
The ink contact 8 is started substantially from the end opposite to the ink receiver 8. As described above, since the rotation direction of the second rotating roll 12 is opposite to the moving direction of the carriage 7, as shown in FIGS. 7 to 9, the ink is raised on the ink receiver 8 as the carriage 7 moves. The printing ink 14a adhered to the peripheral surface of the second rotary roll 12 and was rolled up, and a part of the printing ink 14a was wound on the second rotary roll 1.
It goes around 2 times and is supplied again to the printing plate for reuse.
The other part is returned to the inside of the ink fountain 13 via the first rotary roll 11 which rotates in the opposite direction to the second rotary roll 12. It goes without saying that the printing ink 14 thus collected in the ink fountain 13 is supplied again to the plate surface via the first rotating roll 11 and the second rotating roll for reuse. 8 and 9, the ink fountain 13 to the first rotating roll 11
And the flow of the printing ink 14 supplied to the plate surface via the second rotating roll 12 and the broken line, the printing ink 14a returning from the ink receiver 8 to the ink fountain 13 via the second rotating roll 12 and the first rotating roll 11. Is indicated by a dashed line.

Then, the carriage 5 starts moving in the opposite direction again, and the cylinder 1 descends again to press the blanket 2 against the surface of the printing medium 3. With the movement of the carriage 5, the printing ink 14 on the blanket 2 is transferred to the surface of the material 3 to be printed without changing its pattern shape, and the printing of the material 3 to be printed is completed (FIG. 10). Are discharged (FIG. 11). Then, the step of setting the next substrate to be printed on the surface plate 4 (FIG. 2) and again bringing the doctor device 9 into contact with the plate surface (FIG. 3) is repeated. In this way, it is possible to repeatedly print a large number of sheets.

FIG. 12 is a sectional explanatory view of the ink supply device 10. In the figure, reference numeral 15 is a cover for covering the first rotating roll 11 and the second rotating roll 12 for the sake of worker's safety and fixing the rotating rolls 11 and 12 at positions facing each other. Then, by operating the air cylinder 16 to rotate the second rotary roll 12 and its cover 15 about the first rotary roll 11, the second rotary roll 12 is brought into contact with and separated from the plate surface. Is possible.

[0021]

According to the present invention, since the printing ink outside the screen area can be collected in the ink fountain during the printing process while ensuring the safety of the operator, it is not necessary to perform the manual work of the operator. Printing can be automated and speeded up, and the amount of printing ink used can be reduced. Further, since there is no worker involved, it is possible to prevent the inclusion of dust and the like in the printing ink and improve the quality of the printed matter.

[Brief description of drawings]

FIG. 1 is an explanatory view of an intaglio printing machine provided with an ink supply device according to the present invention.

FIG. 2 is an explanatory diagram of a printing process of an intaglio printing machine including an ink supply device according to the present invention.

FIG. 3 is an explanatory diagram of a printing process of an intaglio printing machine including an ink supply device according to the present invention.

FIG. 4 (a) is a plan view showing the shape of the printing ink removed from the screen area, and FIG. 4 (b) is a sectional view thereof.

FIG. 5 is an explanatory diagram of a printing process of an intaglio printing machine provided with the ink supply device according to the present invention.

FIG. 6 is an explanatory diagram of a printing process of an intaglio printing machine provided with the ink supply device according to the present invention.

FIG. 7 is an explanatory diagram showing a process of collecting printing ink by the ink supply device according to the present invention.

FIG. 8 is an explanatory diagram showing a process of collecting printing ink by the ink supply device according to the present invention.

FIG. 9 is an explanatory diagram showing a process of collecting printing ink by the ink supply device according to the present invention.

FIG. 10 is an explanatory diagram of a printing process of an intaglio printing machine provided with the ink supply device according to the present invention.

FIG. 11 is an explanatory diagram of a printing process of an intaglio printing machine provided with the ink supply device according to the present invention.

FIG. 12 is an explanatory cross-sectional view of an ink supply device according to the present invention.

FIG. 13 is an explanatory diagram of a conventional intaglio printing machine.

FIG. 14 is an explanatory diagram of a printing process of a conventional intaglio printing machine.

FIG. 15 is an explanatory diagram of a printing process of a conventional intaglio printing machine.

FIG. 16 is an explanatory diagram of a printing process of a conventional intaglio printing machine.

FIG. 17 is an explanatory diagram of a printing process of a conventional intaglio printing machine.

FIG. 18 is an explanatory diagram of a printing process of a conventional intaglio printing machine.

FIG. 19 is an explanatory diagram of a printing process of a conventional intaglio printing machine.

[Explanation of symbols]

 1 cylinder. 2 Elastic blanket. 3 Printed material. 4 Surface plate for printed material. 5 Intaglio for printing. 6 edition surface plate. 7 carts. 8 Ink receiver. 9 Doctor device. 10 Ink supply device. 11 First rotating roll. 12 Second rotating roll. 13 Inkwell. 14 Printing ink.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuro Kato 1-5-1, Taito, Taito-ku, Tokyo Toppan Printing Co., Ltd.

Claims (1)

[Claims] 1. A plate-shaped intaglio plate having a concave portion constituting an image area in a screen area, an ink supplying means for supplying printing ink onto the plate surface of the intaglio plate, and the concave portion by rubbing the plate surface to which the printing ink is supplied. Other than the screen area other than this screen area, and a doctor device for removing the printing ink outside this screen area, and a printing ink transfer means for transferring the printing ink, which is rubbed by this doctor device and selectively remains in the recesses, onto the substrate. In the above-mentioned ink supply means of the intaglio printing machine, it is composed of an ink fountain of printing ink and a rotary roll group arranged between the ink fountain and the plate surface of the intaglio plate. Along with this, the printing ink is received from the ink fountain and supplied to the plate surface of the intaglio plate, and the printing ink removed outside the screen area of the plate surface is received and returned to the ink fountain. Ink feeder of an intaglio printing press to.