JP2009039984A - Manufacturing method of intaglio, and intaglio - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of an intaglio where ink can be surely and smoothly scraped by a doctor blade, irrespective of the kind of ink in use, thereby obtaining printed matter of high quality, and to provide the intaglio with recessed grooves. <P>SOLUTION: The manufacturing method of the intaglio includes: an intermediate layer formation process to form an intermediate layer on the outer surface of a core material; a surface layer formation process to laminate a surface layer on the intermediate layer; and a recessed groove formation process to form the recessed groove which is as deep as a depth from the laminated surface layer to the intermediate layer with a single processing step. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a method for manufacturing an intaglio and an intaglio provided with an indentation groove.

Intaglio printing is performed by filling ink in the groove and scraping the ink remaining on the non-image area other than the groove with a doctor and then transferring the ink in the groove to paper, film or other media. Print. In the intaglio printing, the image line portion is constituted by a concave groove, so that the plate is not easily worn, and a large amount of printing can be performed because there is little change in the image. Moreover, since the gradation of the photograph can be expressed by the difference in the ink amount, heavy and beautiful printing can be realized.

Various types of ink can be used for the intaglio, but from the viewpoint of improving the printing work environment, protecting the natural environment, increasing the cost by introducing organic solvent treatment equipment, and other viewpoints, a method using water-based ink from ink using organic solvent It is being considered to shift to In general, as compared with organic solvent-based inks, printing using water-based ink can obtain a high-quality image with a higher number of lines.
Ryoji Ito, “Printing Technology in General” Industrial Books, September 15, 1960, P.A. 96-105

However, in intaglio printing, ink may not be sufficiently scraped off by a doctor and ink may remain on the non-image area surface. In this case, a fogging defect in which ink is transferred to a portion that should not be printed occurs, thereby causing problems such as a decrease in productivity of printed matter and an increase in cost for consumables such as plates.

Such a problem is remarkable in intaglio printing using water-based ink, in which the drying of the ink is slow and the sliding property between the doctor and the plate is low. That is, since the drying of the ink is slow, the ink remaining on the non-image area surface is transferred to the medium without drying and becomes apparent as an image. Also, due to the low sliding property, not only the ink on the non-image area surface cannot be scraped sufficiently, but also it may not be able to be uniformly scraped by splashing on the non-image area surface. Furthermore, since the doctor is likely to wear out, the production cost further increases.

Accordingly, the present invention provides a method for producing an intaglio plate, which can reliably and smoothly scrape ink by a doctor regardless of the type of ink to be used, and thereby obtain a high-quality printed matter, and a groove. An object is to provide an intaglio plate provided. Another object of the present invention is to produce an intaglio plate that can prevent fogging defects by simply forming a concave groove with few steps. Furthermore, an object of the present invention is to provide an intaglio plate manufacturing method and an intaglio plate capable of forming a concave groove having a desired shape with high accuracy.

In order to solve the above-mentioned problems, in the method for producing an intaglio according to the present invention, an intermediate layer forming step for forming an intermediate layer having ink depositability on the outer surface of the core material, and water repellency and / or repellent properties on the intermediate layer. A surface layer forming step of forming a surface layer having oiliness, and a groove forming step of forming a groove having a depth reaching from the laminated surface layer to the intermediate layer by one processing. Yes.

In the intaglio plate manufacturing method of the present invention, in the indentation groove forming step, it is preferable to form indentations by irradiating laser light from the surface layer side to sublimate a predetermined range of the surface layer and the intermediate layer.

In the intaglio plate manufacturing method of the present invention, in the indentation groove forming step, the indentation groove can be formed by engraving by an engraving means.

In the intaglio manufacturing method of the present invention, it is preferable that the core material has a cylindrical shape, and the cylindrical intaglio is manufactured by forming an intermediate layer and a surface layer on the outer peripheral surface of the core material.

In the method for producing an intaglio according to the present invention, it is preferable that the intermediate layer is provided with ink deposition properties.

In the method for producing an intaglio according to the present invention, the surface layer is preferably formed by plating containing a resin.

In the method for producing an intaglio according to the present invention, the surface layer can be formed by plating containing a fluororesin.

In the method for producing an intaglio according to the present invention, the surface layer is preferably formed by plating containing PTFE.

In the method for producing an intaglio according to the present invention, the surface layer can be formed by chromium plating containing PTFE or nickel plating containing PTFE.

Furthermore, the intaglio of the present invention comprises a cylindrical core material, an intermediate layer formed on the outer surface of the core material, and a surface layer laminated on the intermediate layer, from the surface layer to the intermediate layer It is characterized in that a recessed groove having a reachable depth is formed.

According to the present invention, an intermediate layer forming step for forming an intermediate layer having ink deposition properties on the outer surface of the core material, and a surface layer forming step for forming a surface layer having water repellency and / or oil repellency on the intermediate layer. And a concave groove forming step for forming a concave groove having a depth reaching from the laminated surface layer to the intermediate layer by one processing, so that the desired shape can be easily formed with fewer steps and with high accuracy. A concave groove can be formed. In addition, regardless of the type of ink used, it is possible to stabilize the ink deposition on the intermediate layer and to ensure that the doctor scrapes the ink reliably and smoothly, thereby preventing high-quality fog. A printed matter can be obtained.

Hereinafter, an intaglio manufacturing method and an intaglio according to an embodiment of the present invention will be described in detail with reference to the drawings.
Although this embodiment shows embodiment at the time of applying this invention to a cylindrical intaglio, this invention is applicable also to intaglio other than a cylindrical shape.

FIG. 1 is a diagram illustrating a schematic configuration of a concave groove forming apparatus 10 that forms concave grooves of the intaglio 20 according to the present embodiment.
As shown in FIG. 1, the groove forming apparatus 10 includes an irradiation unit 11 that irradiates laser light, a control unit 12 (for example, a microcomputer chip), an input unit 13 (for example, a keyboard and touch keys), and a drive unit 14. And comprising. The irradiation unit 11 irradiates a predetermined position on the outer peripheral surface (outer surface) 24 (the outer peripheral surface of the surface water-repellent layer 23) of the intaglio 20 with a laser beam having a predetermined pattern and intensity. The irradiated portion is sublimated by the heat generated by the laser beam to form a concave groove 25 (FIG. 2). Here, the intaglio 20 is formed by laminating an engraving layer (intermediate layer) 22 and a surface water-repellent layer (surface layer) 23 in order on the outer peripheral surface of a cylindrical core material 21. The raw material of the intaglio 20 refers to a cylindrical material after the surface water-repellent layer 23 is formed and before the concave groove 25 is formed from the outer peripheral surface 24. In the following description, the intaglio 20 is referred to as an intaglio 20.

In the formation of the concave groove on the intaglio 20, the irradiation unit 11 is moved along the direction of the axis C of the intaglio 20 by the control of the control unit 12 according to the conditions set by the user of the apparatus using the input unit 13. At the same time, the intaglio 20 is rotated around its axis, and laser light is emitted from the irradiation section 11 onto the intaglio 20, thereby forming the indentation groove 25 having a desired depth in a desired pattern. In the intaglio 20, the concave groove 25 from the surface water-repellent layer 23 to a desired depth of the engraving layer 22 (depth reaching from the surface layer to the intermediate layer) according to the intensity of the laser light emitted from the irradiation unit 11. Are formed by one processing (by one laser beam irradiation).

As the irradiation unit 11, a known laser beam irradiation device can be used, and as a type of the laser, a YAG laser, a YVO 4 laser, and a carbon dioxide gas laser are preferable. Further, the wavelength and intensity of the laser beam can be arbitrarily set according to the material constituting the surface water-repellent layer 23 and the engraving layer 22 and the shape and depth of the groove to be formed. As the groove forming apparatus 10, for example, Cellaxy 0611 manufactured by Hell can be used, and in this apparatus, a high-definition groove can be formed with a laser beam having a wavelength of 1064 nm.

In the present invention, if a groove having a depth reaching from the surface water-repellent layer 23 to the engraving layer 22 can be formed in one step, the method can be performed by a method other than laser light irradiation. For example, an apparatus (engraving means) that forms a concave groove by vibrating a tip engraving portion having a hardness that can engrave, cut, or polish the surface water-repellent layer 23 and the engraved layer 22 can also be used.

Next, the manufacturing process of the intaglio will be described with reference to FIG. Here, FIG. 2 is a partially enlarged cross-sectional view of the II part of FIG. 1 showing the manufacturing process of the intaglio according to this embodiment.

The core material 21 is a metal member (for example, iron, aluminum) formed in a cylindrical shape (FIG. 2A). A sculpture layer 22 having ink inking property is uniformly formed on the outer peripheral surface of the core material 21 to form a cylindrical shape (FIG. 2B). The engraving layer 22 has a diameter required as an intaglio by plating with copper, chromium, or nickel, for example.

Next, the surface water-repellent layer 23 is uniformly formed on the outer peripheral surface of the engraving layer 22 to form a cylindrical shape (FIG. 2C). The surface water-repellent layer 23 is formed by immersing the engraving layer 22 formed on the core material 21 in a metal plating solution in which a resin is dispersed. Examples of the metal plating to be used include chrome, copper, nickel, aluminum, iron, and manganese. Examples of the resin dispersed in the plating solution include a fluorine-based resin (PTFE (polytetrafluoroethylene), PFA (perfluoroalkoxyalkane), FEP (perfluoro-ethylene-propylene)), or a silicone-based resin. It is done. The ratio of the resin in the metal plating solution is set according to the type of ink used for printing, the printing speed and other specifications related to printing, and the type and intensity of laser light. The formed surface water-repellent layer 23 has a property of repelling ink depending on the property of the material. When the surface water-repellent layer 23 is made of chrome plating containing PTFE, since the surface tension is low, in addition to the water-repellent property that repels water-based ink, oil-repellent property that repels oil-based ink can also be obtained.

Subsequently, the outer circumferential surface 24 of the surface water-repellent layer 23 is irradiated with laser light using the irradiation unit 11 to form a concave groove 25 having a desired shape (FIG. 2D). In the surface water-repellent layer 23 and the engraving layer 22, the portion irradiated with the laser light has a shape corresponding to the irradiation range, and the material sublimates, whereby the concave groove 25 is formed. The concave groove 25 can be formed to a depth that reaches from the surface water-repellent layer 23 to the engraving layer 22 by only one step, that is, one time of laser light irradiation (one time of processing). The layer thickness of the engraving layer 22, the layer thickness of the surface water-repellent layer 23, and the depth of the groove 25 can be arbitrarily set according to the printing specifications. When the thickness of the surface water-repellent layer 23 is 1 to 10 μm, the depth of the groove 25 can be 10 to 70 μm.

In the intaglio plate 20 configured as described above, the ink 30 is filled in the concave groove 25 as shown in FIG. 3 and the ink remaining on the outer peripheral surface 24 is scraped off by the doctor 40 and used for printing. That is, the ink 30 in the groove 25 is transferred onto the medium by rotating the intaglio 20 while pressing paper, film or other medium against the outer peripheral surface 24 of the intaglio 20 with a predetermined pressure. Here, FIG. 3 is a partially enlarged cross-sectional view corresponding to FIG. 2, showing a state where ink is filled in the concave groove 25 of the intaglio 20 according to the present embodiment.

In this way, by providing the surface water-repellent layer 23 on the outermost layer of the intaglio 20, the ink supplied to the outer peripheral surface 24 of the intaglio 20 is packed in the concave groove 25, while the surface remaining on the outer peripheral surface 24. Since it is repelled by the water repellent layer 23, it can be easily and reliably scraped off by the doctor 40. Therefore, no ink remains on the outer peripheral surface 24 which is a non-image area, so that fogging can be prevented.

The material constituting the surface water-repellent layer 23 is selected according to the type of ink 30 to be used. That is, when water-based ink is used, a material having water repellency is selected, and when oil-based ink is used, a material having oil repellency is selected. Note that the fluorine-based resins (PTFE, PFA, FEP) and silicone-based resins already exemplified are provided with water repellency and oil repellency and can be used regardless of the type of ink.

Moreover, in the intaglio plate manufacturing method and the intaglio plate according to the present embodiment, the intaglio indentation groove is formed by only the three steps of forming the engraving layer 22, forming the surface water-repellent layer 23, and forming the indentation groove 25. Therefore, it can be easily manufactured at a low cost.

Furthermore, since the concave grooves 25 are formed using laser light, high-definition concave grooves that are faithful to the design shape can be formed.

Although the present invention has been described with reference to the above embodiment, the present invention is not limited to the above embodiment, and can be improved or changed within the scope of the purpose of the improvement or the idea of the present invention.

As described above, the intaglio manufacturing method and the intaglio according to the present invention are useful for high-quality intaglio printing with no fogging defect particularly when water-based ink is used, and a package for film packaging that requires high quality. Suitable for

It is a figure which shows schematic structure of the formation apparatus of the concave groove of the intaglio plate based on embodiment of this invention. It is the elements on larger scale in the II section of Drawing 1 showing the manufacturing process of the intaglio concerning the embodiment of the present invention. FIG. 3 is a partial enlarged cross-sectional view corresponding to FIG. 2, showing a state in which ink is filled in the concave grooves of the intaglio according to the embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Concave formation apparatus 11 Irradiation part 12 Control part 13 Input part 14 Drive part 20 Intaglio 21 Core material 22 Engraving layer (intermediate layer)
23 Surface water-repellent layer (surface layer)
24 Outer peripheral surface (outer surface)
25 Groove 30 Ink 40 Doctor C axis

Claims (10)

An intermediate layer forming step of forming an intermediate layer having ink inking properties on the outer surface of the core material;
A surface layer forming step of laminating and forming a surface layer having water repellency and / or oil repellency on the intermediate layer;
A groove forming step of forming a groove having a depth reaching the intermediate layer from the laminated surface layer by a single process;
A method for producing an intaglio, comprising: The intaglio plate manufacturing according to claim 1, wherein, in the concave groove forming step, the concave grooves are formed by irradiating a laser beam from the surface layer side to sublimate a predetermined range of the surface layer and the intermediate layer. Method. The method for producing an intaglio plate according to claim 1, wherein in the concave groove forming step, the concave groove is formed by engraving by an engraving means. The said core material is provided with a column shape, The cylindrical intaglio is manufactured by forming the said intermediate | middle layer and the said surface layer on the outer peripheral surface of the said core material, The any one of Claims 1-3. A method for producing an intaglio plate according to 1. The method for producing an intaglio according to any one of claims 1 to 4, wherein the surface layer is formed by plating containing a resin. The method for producing an intaglio according to claim 5, wherein the surface layer is formed by plating containing a fluorine resin. The method for manufacturing an intaglio according to claim 6, wherein the surface layer is formed by plating containing PTFE. The method for manufacturing an intaglio according to claim 7, wherein the surface layer is formed by chromium plating containing PTFE. The method of manufacturing an intaglio according to claim 7, wherein the surface layer is formed by nickel plating containing PTFE. A cylindrical core,
An intermediate layer formed on the outer surface of the core material;
A surface layer laminated on the intermediate layer,
An intaglio printing plate, wherein a concave groove having a depth reaching from the surface layer to the intermediate layer is formed.

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