JPH11170473A - Method for intaglio offset printing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for intaglio offset printing for realizing an improvement in an efficiency by improving a position and shape accuracies of a print image. SOLUTION: First, a plurality of intaglios 7 used in the case of printing are prepared. A thermographic ink 6a is filled in a groove 5 formed on a surface of each intaglio 7, and then cured. Then, a first intaglio 7 is set on an alignment base 3. A movable base 2 is moved, and a blanket 10 is superposed on the intaglio 7. A roller 14 is rolled to transfer the ink 6a from the intaglio 7 to the blanket 10. Then, the base 2 is moved to superpose the blanket 10 on a base plate 15 (a matter to be printed), the roller 14 is rolled to transfer the ink 6b previously transferred to the blanket 10 to a surface of a base plate 15. Thereafter, the intaglio 7 finished for its operation is removed from the base 3, another intaglio already filled with thermographic ink and cured is set, and the above steps are repeated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intaglio offset printing method, and more particularly to a method of printing a two-dimensional pattern on a flat substrate when manufacturing an electronic component or an optical component. The present invention relates to an intaglio offset printing method suitable for forming.

[0002]

2. Description of the Related Art In intaglio offset printing, printing is performed by first transferring ink to a blanket surface from an intaglio plate fixed to the main body of a printing press, and then transferring the ink from the blanket surface to a printing substrate. As a blanket having such a blanket surface, a roll having a rubber layer on an outer peripheral surface, a rubber sheet having elasticity, a composite sheet including a rubber layer and a steel sheet, and the like are used.

In conventional intaglio offset printing, the solvent contained in the ink is cured by infiltrating the solvent contained in the ink into the blanket, or by blowing dry air onto the ink on the surface of the blanket to remove the solvent contained in the ink. The ink is cured by evaporation, and thereafter, printing is performed on the surface of the printing substrate.

(Problems of the prior art) If the curing time of the ink on the blanket surface is set short for the purpose of increasing the efficiency of printing, the ink is transferred to the printing material in an insufficiently cured state. Will be. In such a case, since the ink is crushed and deformed between the blanket surface and the printing material, the shape of the printed image changes, so that the shape accuracy and position accuracy of the image are impaired, and high-precision printing is performed. Is difficult to implement.

When the solvent contained in the ink penetrates into the blanket, it is not easy to evaporate the solvent to the outside. In this case, the blanket moves with a large amount of solvent, so it is necessary to blow hot air or set a long drying time.However, there is still a danger of fire and defective products at the start of operation. Have problems such as frequent outbreaks.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to prevent deformation of ink transferred from a blanket onto a surface of a printing object, thereby improving the printing image quality. It is an object of the present invention to provide an intaglio offset printing method capable of improving positional accuracy and shape accuracy and improving efficiency.

[0007]

According to the present invention, there is provided an intaglio offset printing method comprising the steps of preparing a plurality of intaglios, applying ink to the grooves of each intaglio, and providing the ink in the grooves of each intaglio. Curing the ink, a first step of overlaying and pressing a sheet blanket on one of the intaglios, and transferring the ink in the grooves to the surface of the blanket; A second step of overlaying and pressing a blanket on the substrate, and further transferring the ink previously transferred to the surface of the blanket to the surface of the substrate, by replacing only the intaglio, using each intaglio A step of sequentially repeating the first step and the second step.

It is also possible to use a cylindrical blanket instead of the above-mentioned sheet blanket. Preferably, an intaglio having a non-adhesive thin film on its surface and the inner surface of the groove is used as each intaglio.

According to the intaglio offset printing method according to the present invention, after a plurality of intaglios to be used are each preliminarily coated with ink and cured, the intaglio printing is performed on the printing material by sequentially using the intaglios. Is performed, printing with high dimensional and shape accuracy can be performed with high efficiency.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Example 1) FIGS. 1A to 1D show examples of an intaglio offset printing method based on the method of the present invention.

First, the configuration of an intaglio offset printing press used in this embodiment will be described with reference to FIG. On the moving table 2, two positioning tables 3, 4 are provided adjacent to each other. The intaglio 7 is adsorbed on one of the positioning tables 3, and the substrate 15, which is an object to be printed, is adsorbed on the other positioning table 4, as shown in FIG. Is done. Above the positioning table 4, a frame 12 holding a sheet-like blanket 10 is arranged. The blanket 10 is composed of a composite sheet including a rubber sheet 8 forming a blanket surface and an invar base sheet 9 having a thickness of about 0.3 mm and a small coefficient of thermal expansion that supports the rubber sheet 8 from the back side. . The blanket 10 is supported horizontally by a frame 12 via a support sheet 11 made of wire mesh, and is stretched horizontally. A roller 14 is disposed above the blanket 10.

Next, a method of printing using the intaglio offset printing machine based on the method of the present invention will be described. First, a plurality of intaglios 7 to be used for printing are prepared, and ink 6a is provided in the grooves 5 formed on the surface of each intaglio 7. Next, a curing process is performed on the ink 6 a provided on each intaglio 7. In addition, this curing treatment is performed by heating, irradiation of light rays, chemical reaction, evaporation and the like. As a result of the curing treatment, the ink 6a is not a viscous material before the treatment but has the same hardness as the clay for pottery,
When the film thickness is about μm, the crush resistance is very strong, and the film is not easily deformed even if a strong pressure is applied between the rubber plates.

Next, as shown in FIG. 1A, the first intaglio among the intaglios 7 in which the ink 6a provided in the grooves 5 has been hardened has been finished, as shown in FIG. Absorb on top.

Next, as shown in FIG.
To remove the alignment table 4 from the underside of the blanket 10 and, instead, remove the alignment table 3 from the blanket 1
Align below 0. In this state, the blanket 10 is overlaid on the intaglio 7, the roller 14 is rolled to apply pressure to the blanket 10 from the back side, and the ink 6 a in the groove 5 of the intaglio 7 is applied to the surface (lower surface) of the blanket 10. Transcribe. At the same time, the substrate 1 is placed on the positioning table 4.
5 (substrate to be printed) is adsorbed.

Next, as shown in FIG.
And the positioning table 4 is again positioned below the blanket 10. In this state, blanket 10
Is placed on the substrate 15 and the roller 14 is rolled to apply pressure to the blanket 10 from the back side, and the ink 6b previously transferred to the surface of the blanket 10 is transferred to the substrate 15 as shown in FIG. Transfer to the surface (upper surface) of No. 15.

Thereafter, the intaglio 7 on which the work has been completed is removed from the positioning table 3, and another intaglio, which has already been subjected to the ink embedding and curing processing, is removed from the positioning table 3 as shown in FIG. And the above printing process is repeated.

According to the above printing method, unlike the conventional printing method, it is not necessary to cure the ink 6b on the surface of the blanket 10 for a long time, and the intaglio 7 can be exchanged in a short time. Printing can be performed efficiently.

In the conventional printing method, since the print quality is not stable for a long time until the amount of the solvent penetrating into the blanket 10 is stabilized, defective products are likely to be generated, which is a factor of increasing the printing cost. However, according to the above printing method, the cured state of the ink 6a in the groove 5 of the intaglio 7 can be managed stably, so that the occurrence of defective products can be suppressed without changing the print quality. Can be.

(Example 2) FIG. 2 shows another example of the intaglio offset printing method based on the method of the present invention. First, FIG.
The configuration of the intaglio offset printing press used in this example will be described with reference to FIG. This example is suitable for printing on a large-sized substrate, and a cylindrical blanket 20 is used instead of the sheet-like blanket 10 (FIG. 1) in the previous example.

On the moving table 2, two positioning tables 3,
4 are provided adjacent to each other. The intaglio 27 is adsorbed on one of the positioning tables 3 and the substrate 16 (FIG.
(See (b)). Above the positioning table 4, a cylindrical blanket 20 is arranged. The blanket 20 includes a metal roll 18 and a rubber layer 19 wound around the outer periphery of the roll 18, and the outer peripheral surface of the rubber layer 19 forms a blanket surface.

Next, a method of printing using the intaglio offset printing machine based on the method of the present invention will be described. As in the case of Example 1, first, a plurality of intaglios 27 used for printing are prepared, and the ink 26a is filled in the grooves 25 formed on the surface of each intaglio 27, and then the ink 26a is cured. Perform processing.

Next, as shown in FIG. 2A, the first intaglio 27 of the intaglio in which the curing of the ink 26a provided in the grooves 25 has been completed is completed, as shown in FIG.
Absorb on top.

Next, as shown in FIG.
To remove the alignment table 4 from the underside of the blanket 20 and, instead, remove the alignment table 3 from the blanket 2
Align below 0. In this state, the blanket 20 is pressed onto the intaglio 27 and rolled on the intaglio 27 to transfer the ink 26 a in the groove 25 of the intaglio 27 to the surface (outer peripheral surface) of the blanket 20. In parallel with this,
The substrate 16 (substrate to be printed) is sucked onto the positioning table 4.

Next, as shown in FIG.
, And the positioning table 4 is again positioned below the blanket 20. In this state, blanket 20
Is pressed on the substrate 16 and rolled on the substrate 16 so that the ink 2 previously transferred to the surface of the blanket 20 is
6b is transferred to the surface (upper surface) of the substrate 16 as shown in FIG.

After that, the intaglio 27 on which the work has been completed is removed from the positioning table 3, and another intaglio, which has already been subjected to the ink application and curing treatment, is used as shown in FIG.
The printing is performed by adsorbing on the positioning table 3 and the above-described printing process is repeated.

Intaglio 7 used in the above printing method
As the material of (27), plate glass is usually used,
The groove 5 (25) is formed by the etching. Depending on the type of the ink, the ink 6a cured on the intaglio 7 adheres to the inner surface of the groove 5 or the surface of the intaglio 7 other than the groove, and the ink 6a is transferred from the groove 5 to the blanket 10 without falling out. May not be. In such a case,
The problem described above can be solved by forming a non-adhesive thin film (thickness: about 1 to 2 μm) on the inner surface of the groove 5 of the intaglio plate 7 using a fluorine resin or a silicon resin.

Also, by forming a non-adhesive thin film on the surface of the intaglio 7 other than the grooves 5, the ink 6 of the intaglio 7 can be formed.
a can be prevented, and a printing defect due to the stain can be prevented. In particular, in the intaglio offset printing, since the ink 6a is accurately formed by the shape of the groove 5 of the intaglio 7, a very fine print image can be obtained, and the ink 6a is formed of a color filter having a small thickness, and further having an ink 6a. It can be used for a wide range of uses such as a thick film electronic circuit having a large thickness 6a.

[0028]

According to the intaglio offset printing method of the present invention, it is possible to stabilize the state of the ink before it is transferred to the surface of the printing material, so that the shape accuracy of the ink transferred to the surface of the printing material and High position accuracy. Further, before the ink is transferred to the blanket, the ink is cured beforehand, so that the printing efficiency is high.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of an intaglio offset printing method according to the present invention, wherein (a) to (d) show states in respective steps.

FIGS. 2A to 2D are diagrams showing another example of the intaglio offset printing method of the present invention, wherein FIGS.

[Explanation of symbols]

 2, moving table, 3, 4, positioning table, 5, 25, groove, 6a, 6b, 26a, 26b, ink, 7, 27, intaglio, 8, rubber Sheet, 9: Base sheet, 10: Blanket, 11: Support sheet, 12: Frame, 14: Roller, 15, 16: Substrate (substrate), 18: Roll, 19 ... rubber layer, 20 ... blanket.

Claims (3)

[Claims] A step of preparing a plurality of intaglios and applying ink in the grooves of each intaglio; a step of curing the ink provided in the grooves of each intaglio; A first step of superimposing and pressing a sheet-like blanket on one of the intaglios, transferring the ink in the grooves to the surface of the blanket; and superimposing and pressing the blanket on a substrate to be printed. A second step of further transferring the ink transferred to the surface of the blanket to the surface of the substrate, exchanging only the intaglio, and sequentially repeating the first step and the second step using each intaglio And an intaglio offset printing method, comprising: 2. A step of preparing a plurality of intaglios and applying ink in the grooves of each intaglio; a step of curing the ink provided in the grooves of each intaglio; Rolling a cylindrical blanket on one of the intaglio, transferring the ink in the grooves to the surface of the blanket; and rolling the blanket on the substrate, A second step of further transferring the ink transferred to the surface of the blanket to the surface of the substrate, exchanging only the intaglio, and sequentially performing the first step and the second step using each intaglio An intaglio offset printing method, comprising: repeating the steps. 3. The intaglio offset printing method according to claim 1, wherein an intaglio having a non-adhesive thin film on a surface thereof and an inner surface of the groove is used as the intaglio.