JP3042161B2 - Ink supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus of a circular pressure type,
An ink supply device that supplies ink to printing devices such as an intaglio offset printing device suitable for printing fine patterns such as color filters and a screen printing device suitable for printing fine patterns such as various electrical wiring patterns. It is about.

[0002]

2. Description of the Related Art Conventionally, in a circular pressure type printing apparatus which performs printing by transferring ink from a plate-shaped intaglio, for example, a blanket cylinder can be moved up and down, and an intaglio cylinder is provided below the blanket cylinder. There is an intaglio offset printing apparatus that prints on a substrate by reciprocating a carriage that supports the substrate and a substrate (a substrate to be printed, for example, a glass substrate) in the horizontal direction.

As shown in FIG. 3, this intaglio offset printing apparatus 1 has a carriage 2 supported on a gantry 2 so as to be movable in a horizontal direction, and a blanket cylinder 4 is movable on a gantry 2 in a vertical direction. It is supported by. Also, the squeegee 5 and the doctor 6 are moved laterally on the intaglio 7 to perform squeezing and doctoring, and the squeegee 5 and the doctor 6 are also attached to the gantry 2 so as to be vertically movable. , Is provided so as to wait above when the squeegeeing and doctoring are completed. In this way, in the intaglio offset printing apparatus 1, after supplying ink to the intaglio 7, a fine pattern is formed through squeezing, doctoring, ink transfer from the intaglio 7 to the blanket cylinder 4, and ink transfer from the blanket cylinder 4 to the substrate 8. And printing.

Further, electric wiring such as a hybrid IC,
A screen printing apparatus is used to obtain a conductive pattern such as a partition of a plasma display panel (PDP) and a chip-on-glass (COG) electrode. Briefly describing this, as shown in FIG. 6, the screen printing device 9 puts a screen mesh 10 having a pattern formed on a plate frame 11, and the screen mesh 10
An ink a (in this case, a conductive or non-conductive one, for example, a paste containing a metal or a metal oxide) is supplied thereon, spread by a squeegee 12, and the ink is screened on the side of a printing material. Printing is performed in a pattern configured on the mesh 10.

[0005]

As described above, in the intaglio offset printing apparatus described above, the ink is supplied to the intaglio each time printing is performed in one cycle, and is scraped by a doctor in order to use the ink economically. The ink is supplied again by spreading the ink on the intaglio.

For this reason, the ink is subjected to repeated squeezing on the intaglio plate and is in a foamed state containing a large amount of air. As shown in FIGS. 4 and 5, this ink a (in this case,
The conductive or non-conductive ink used in the screen printing apparatus described above is pushed into the cell b by doctoring, and a pinhole d is formed in the transfer pattern of the ink transferred from the intaglio to the blanket c.
There was a problem that causes. Similarly, a new ink may be in a foamed state with air in the ink, and the above-mentioned problem may be caused by using this ink. In particular, this phenomenon occurs more frequently when the amount of ink transferred from the intaglio to the blanket is reduced to obtain a fine pattern with a small film thickness. Was a disadvantage.

On the other hand, a problem has also arisen when attempting to obtain a fine pattern by the screen printing. In other words, in the case of screen printing as well, since the ink is used after being squeezed many times on a screen mesh, the ink viscosity on the screen mesh is likely to change (for reasons such as solvent evaporation). It is difficult to always repeat printing while maintaining a constant ink viscosity. This situation is supplemented by the feelings and experience of highly skilled workers, so depending on the type of printing (such as those for which printing film thickness, line width control, etc. are strictly specified), it can be easily performed. However, there is a problem that the worker cannot be replaced.

[0008] Further, the problem of air mixing described above is the same. Since air is mixed into ink by repeated squeezing on a screen mesh, particularly in forming wiring such as a hybrid IC using an ink made of a metal paste. Is likely to cause disconnection at the time of firing due to bubbles, which causes the yield to not increase.

In view of the above circumstances, the present invention removes air from ink supplied on an intaglio or screen mesh, that is, fresh ink or collected ink,
An object of the present invention is to prevent ink entering a cell from having air (bubbles) and to make ink viscosity constant, and not only the intaglio printing apparatus and the screen printing apparatus described above, but also other types of printing apparatuses. It is an object of the present invention to obtain a good fine pattern without pinholes even when used.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems, and a first invention is to combine a plurality of rotating kneading rollers to feed ink while kneading between the kneading rollers. A meat grinder, an ink tank for storing and stirring the ink sent from the meat grinder, and an ink supply means for supplying ink from the ink tank to a nozzle on a printing plate, and An ink supply device, comprising: a solvent supply unit that supplies a solvent into the ink in the ink tank so that the ink viscosity becomes a predetermined ink viscosity while detecting the ink viscosity in the ink tank. An object of the present invention is to solve the above problem by providing a supply device.

The second invention is a combination of an ink tank for stirring the ink, a plurality of rotating kneading rollers, and a kneading device for kneading the ink sent from the ink tank between the kneading rollers while kneading the ink. An ink fountain for receiving the ink sent from the meat kneading machine; and an ink supply means for supplying ink from the ink fountain to a nozzle on a plate of a printing press, and detecting ink viscosity in the ink fountain while An ink supply device comprising a solvent supply means for supplying a solvent into the ink in an ink tank so that the ink viscosity becomes a predetermined ink viscosity. The ink supply device is provided to solve the above-described problem. Things.

[0012]

In the first aspect of the invention, when the ink is kneaded between the kneading rollers in contact with the kneading machine, air is released from the ink to the outside air, thereby removing air from the ink. Then, at the time of passing through the kneading machine, the solvent is released to the atmosphere side and the ink whose viscosity is increased is received in an ink tank, and the viscosity is adjusted in the ink tank. Second
In the present invention, similarly, when the ink is kneaded between the kneading rollers in contact with the meat kneader, air is released from the ink to the outside air. Then, a solvent is supplied in advance in the ink tank so as to have a predetermined ink viscosity by passing through the kneading machine.

[0013]

Next, the present invention will be described in detail with reference to the embodiments shown in FIGS. FIG. 1 shows a first embodiment of the ink supply device 13. Ink supply device 13
A plurality of rotating kneading rollers 14 are arranged side by side, and the ink a received from the ink supply body 15
A kneading machine 16 for kneading and sending out while passing between the four, and an ink tank 18 connected via a doctor 17 in contact with the final kneading roller 14 of the kneading machine 16 to receive the ink a from the kneading machine 16. And an ink supply means 19 for forcibly sending ink from the ink tank 18 to a nozzle on a plate of a printing apparatus.

The ink tank 18 is provided with a stirrer 20 for stirring the stored ink, and a solvent supply means 21 for adjusting the viscosity of the ink a in the ink tank 18 to a predetermined ink viscosity. ing. The solvent supply means 21 includes a viscometer (Viscon) 22 for detecting the viscosity of the ink in the ink tank 18, a solvent injection 23 for feeding a solvent into the ink, and a predetermined ink viscosity set by the viscometer 22. And a controller 24 for setting the amount of solvent supplied to the solvent injection 23 and operating the solvent injection 23.

In the ink supply device 13 having this configuration, as described above, the ink a whose viscosity has been increased due to the removal of air by the meat mixing device 16 is stored in the ink tank 18, and a predetermined amount of ink a is stored in the ink tank 18. Since the ink viscosity is adjusted and the ink is supplied to the printing press, high-quality ink without air can be supplied, for example, on an intaglio, without causing pinholes, which have been a problem in the past. And a good fine pattern can be obtained by printing.
The viscosity of the ink obtained by the above adjustment is, for example, 3000 to 35000 suitable for an intaglio offset printing press.
cp (centipoise) and can be set appropriately for other types of printing methods. The initial supply ink is solvent type,
Any solvent-free type may be used. In the above embodiment, the stirring of the ink in the ink tank 18 is performed by a stirrer. Alternatively, an ultrasonic vibrator may be attached to the ink tank to replace the stirring.

FIG. 2 shows a second embodiment. In the ink supply device 13, the ink is supplied to the meat mixing device 16 from an ink tank 18 arranged in a process before the ink kneading process by the meat mixing device 16. That is, the ink a is supplied from the ink tank 18 to the kneading machine 16, and the kneading machine 16 removes air while kneading and sending the ink a as described above. Then, through the doctor 17,
Is received by an ink reservoir 25, where the ink is temporarily stored and then forced by an ink supply means 19 connected to the ink reservoir 25 to be sent out to a nozzle on a printing plate when necessary. It is provided in.

In the second embodiment, an agitator 20 is provided in an ink tank 18 and the ink reservoir 2 is provided.
5 and a solvent supply means 26 comprising a solvent injection 23 and a controller 24 arranged in the ink tank 18. In the solvent supply means 26, the controller 24 compares the ink viscosity detected from the viscometer 22 of the ink reservoir 25 with a predetermined ink viscosity, and sets a solvent supply amount. Is working. That is, the above-mentioned dough 1
The ink viscosity is adjusted in the ink tank 18 on the upstream side of the meat mill 16 so that the ink that has reached the ink reservoir via the nozzle 6 has a predetermined viscosity. In this embodiment, as in the first embodiment, the ink is adjusted to a predetermined viscosity and the ink is supplied to the printing press, so that good quality ink without air can be obtained and no pinholes or the like occur. It is possible to print a fine pattern or the like.

[0018]

As described above, according to the present invention,
An ink supply device is a combination of a plurality of rotating kneading rollers, and a kneading device that sends out ink while kneading between kneading rollers, and an ink tank that receives and agitates the ink sent from the kneading device, An ink supply means for supplying ink from the ink tank to a nozzle on a plate of a printing press; and detecting a viscosity of the ink in the ink tank while supplying a solvent to the ink tank so that the ink viscosity becomes a predetermined ink viscosity. A solvent supply means for supplying the ink into the ink tank, and an ink tank for stirring the ink, and a plurality of rotating kneading rollers combined to knead the ink sent from the ink tank between the kneading rollers. and meat unit, supplying said the ink reservoir receiving the sent-out inks from kneading device, the nozzle on the plate of the ink to the printing press from the ink reservoir That a ink supply means, and is provided with a solvent supply means for supplying the ink in the ink tank of the solvent to the ink viscosity while detecting the ink viscosity in said reservoir ink becomes a predetermined ink viscosity.

Therefore, the ink set to a predetermined viscosity,
In addition, ink from which air has been removed can always be obtained, the supply of ink containing air, which has occurred in intaglio offset printing or screen printing, is eliminated, and a high-quality fine pattern free of pinholes can be easily obtained. Then, by supplying the ink whose defoaming and viscosity is controlled onto the screen plate each time, a paste containing a metal or a metal oxide, such as a wiring of a hybrid IC, a partition of a plasma display, a chip-on-glass electrode, etc., is formed. By printing ink, it is possible to prevent defects such as disconnection and shape defects after firing, and it is possible to suppress the occurrence of pinholes even when printing color filters of large pixels or resist on an etching substrate. In this way, even in various printing methods, by supplying ink with defoaming and viscosity control, stabilization of print quality is promoted, and the burden on conventional workers can be reduced, and practicality can be reduced. It has excellent effects.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a first embodiment of an ink supply device according to the present invention.

FIG. 2 is an explanatory diagram showing a second embodiment of the ink supply device according to the present invention.

FIG. 3 is an explanatory diagram showing an intaglio offset printing apparatus.

FIG. 4 is an explanatory view showing a conventional cell supplied with ink.

FIG. 5 is an explanatory view showing a state of ink transfer from a cell to which a conventional ink is supplied.

FIG. 6 is an explanatory diagram illustrating a screen printing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 13 ... Ink supply apparatus 14 ... Mixing roller 16 ... Mixer 18 ... Ink tank 19 ... Ink supply means 20 ... Agitator 21, 26 ... Solvent supply means 22 ... Viscometer 23 ... Solvent injection 24 ... Controller 25 ... Ink reservoir

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI B41F 31/08 B41F 31/02 S

Claims (2)

(57) [Claims] 1. A kneading machine that combines a plurality of rotating kneading rollers to feed ink while kneading the kneading rollers, an ink tank that receives and agitates the ink sent from the kneading machine, An ink supply means for supplying ink from the ink tank to a nozzle of a printing press, and detecting a viscosity of the ink in the ink tank while supplying a solvent so that the ink viscosity becomes a predetermined ink viscosity. An ink supply device comprising a solvent supply means for supplying the ink into the ink. An ink tank for stirring the ink, a combination of a plurality of rotating kneading rollers, a kneading device for kneading the ink sent from the ink tank between the kneading rollers, and a kneading device for kneading the ink. An ink reservoir for receiving the collected ink, and ink supply means for supplying ink from the ink reservoir to a nozzle on a printing press. The ink viscosity in the ink reservoir is determined by detecting the viscosity of the ink in the ink reservoir. An ink supply device comprising a solvent supply means for supplying a solvent into the ink in an ink tank so as to have a viscosity.