JP2004091881A - Method for manufacturing embossing roll - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To precisely, easily and inexpensively form a pattern with large bumps, a pattern with fine bumps, a pattern with variously geometric and endless bumps, a pattern with irregular bumps, or a groovy part harmonized with a printing figure, on the surface of a roll by an ink-jet printing technology. <P>SOLUTION: This method comprises forming the first mask by approaching an ink jet nozzle to the roll to be treated and spraying an ink soluble in a strong alkali; subsequently forming the first depressed step by etching a part uncoated with the first mask; sequentially forming the second mask by coating a required place of the part uncoated with the above first mask, with the ink sprayed again from the ink jet nozzle, and etching it again to form the second step of the recess; subsequently likewise repeating formation of the Nth mask on the required point of the uncoated part with the mask, etching, and the formation of the Nth depressed step for a required number of times; then removing all the mask with a strong alkaline liquid; and finally coating it with hard chromium plating. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The invention of the present application press-forms various geometric patterns and irregular irregularities on vinyl cloth, leather cloth, synthetic leather or cushion tile, cardboard, and the like by ink-jet printing technology, and concave and ridge portions corresponding to the printing pattern. And a method for producing an embossing roll.
[0002]
[Prior art]
The production of the embossing roll has been performed by electric discharge machining or the like in the same manner as the engraving or die production by a skilled worker. Further, as a method of manufacturing an embossing roll using a photolithography method, there is, for example, JP-A-5-195288.
[0003]
[Problems to be solved by the invention]
The production of embossing rolls by electric discharge machining or the like as well as the production of metal engraving or molds by skilled workers required skill, days and high costs. In Japanese Patent Application Laid-Open No. 5-195288, the steps of photosensitive film coating-laser exposure-development-etching-resist stripping are repeated, so that production takes time, costs are increased, and the recesses become deeper as the process proceeds. Practical application has been hampered by the difficulty in uniformly coating the photosensitive film coat at the stage of the preparation.
[0004]
The present invention has been devised in view of the above points, and a large uneven pattern or a fine and uneven pattern on the roll surface, or various geometric endless uneven patterns or irregular unevenness on the roll surface by the inkjet printing technique. An object of the present invention is to provide a method for manufacturing an embossing roll that can easily form a pattern or a recessed portion corresponding to a printed pattern with high precision.
[0005]
[Means for Solving the Problems]
The invention of the present application forms a first mask by jetting a strong alkali-soluble ink from an inkjet nozzle to a roll to be processed, and then forms a first-stage recess by etching a portion where the first mask is not applied. Inject the ink again from the inkjet nozzle to form a second mask to be applied to a required portion of the portion where the first mask is not applied, and then etch again to form a second-stage concave portion. Then, the formation and etching of the N-th mask in the required portion of the portion where the mask is not applied and the formation of the N-th concave portion are repeated as many times as necessary, and then the mask is completely removed with a strong alkaline solution. Finally, an object of the present invention is to provide a method for producing an embossing roll, which comprises applying hard chrome plating.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of a method for manufacturing an embossing roll according to the present invention will be described with reference to FIG.
As shown in FIG. 1A, this embossing roll is manufactured by placing a roll R to be processed, for example, plated with copper sulfate to a thickness of 1000 μm, horizontally on chuck rotating means of an ink-jet printer for plate-making (not shown). Both ends are chucked, an inkjet nozzle (not shown) is brought close to the roll to be processed R, and a strong alkali-soluble ink (ink resistant to an etchant) is jetted to form a first mask M1 having a desired shape, Then, the roll R to which the first mask M1 is attached is removed from the chuck rotating means, the both ends are chucked by the chuck rotating means for the etching apparatus, and the roll R is immersed in the etching solution and rotated to form the first mask M1. The uncovered portion is etched to form the first recess 1 as shown in FIG.
Subsequently, the roll to be processed R in which the first-stage concave portion 1 is formed is removed from the chuck rotating means for the etching device, and both ends are chucked horizontally by the chuck rotating means of the ink-jet printer for plate making, as shown in FIG. The same ink is again ejected from the inkjet nozzle to the roll to be processed R on which the first mask M1 has been applied, and the second mask M2 to be applied to a required portion of the portion where the first mask M1 has not been applied is applied. Once formed, it is immersed and rotated again in the etching solution as described above, and the portion where the second mask M2 is not adhered is etched to form the second recess 2 as shown in FIG. 1 (c). The second mask M2 does not need to cover the first mask M1. Depending on the concave portion to be formed, the second mask M2 may not cover the first mask M1.
Subsequently, the roll R to be processed, in which the second-stage concave portion 2 is formed, is removed from the chuck rotating means for the etching apparatus and chucked horizontally at both ends by the chuck rotating means of the ink-jet printer for plate making, as shown in FIG. Then, the same ink is again ejected from the ink jet nozzle to the roll to be processed R on which the second mask M2 is applied, and the third mask M3 is applied to a required portion of the portion where the second mask M2 is not applied. Is formed, and the portion where the third mask M3 is not adhered is etched again by immersion and rotation in an etching solution to form the third concave portion 3 as shown in FIG. The third mask M3 does not need to cover the second mask M2.
Thereafter, similarly, it is necessary to form an N-th mask at a required portion of a portion where the mask is not applied, and to form an N-th concave portion by etching the portion where the N-th mask is not applied. Repeat several times.
Next, the entire mask is removed with a strong alkaline solution, and finally, a hard chrome plating 4 is applied as shown in FIG.
[0007]
When the roll R to be processed is horizontally chucked at both ends by chuck rotating means of an ink jet printer for plate making, and a mask image is printed by ejecting ink from an ink jet nozzle, an appropriate scanning method such as spiral scanning or raster scanning is employed. I don't mind.
In particular, when printing a mask by spiral scanning on the target roll R having various roll diameters, the roll diameter is input and the peripheral speed is set to the speed at which ink is ejected from the inkjet nozzle to form a line. Adjust to When printing a mask by raster scanning on the rolls to be processed R having different roll diameters, a multiplication value of the number of inkjet nozzles × the size of the nozzle pitch is calculated, and the roll diameter is set to this value. By inputting, the peripheral surface moving distance per one intermittent rotation feed of the roll to be processed R is adjusted.
[0008]
【The invention's effect】
As described above, according to the embossing roll manufacturing method of the present invention, the inkjet printing technique, on the roll surface, large irregularities or fine irregularities, or various geometric endless irregularities and It is possible to easily and inexpensively form an irregular concavo-convex pattern or a concave streak portion corresponding to a printed pattern with high precision, thereby improving the quality of a vinyl cloth or the like.
[Brief description of the drawings]
FIG. 1 is an enlarged sectional view of a main part in the order of steps of a method for manufacturing an embossing roll of the present invention.
[Explanation of symbols]
R: roll to be processed, 1 ... first-stage recess, 2 ... second-stage recess, 3 ... third-stage recess, M1: first mask, M2 ... second mask, M3: Third mask,

Claims (1)

The first mask is formed by ejecting a strong alkali-soluble ink from the ink jet nozzle to the roll to be processed, and then the portion where the first mask is not applied is etched to form the first concave portion, and the ink jet nozzle is formed again. A second mask is formed by ejecting ink from a predetermined portion of the portion where the first mask is not applied, and is etched again to form a second-stage concave portion. The formation and etching of the N-th mask in the required portion of the non-deposited portion to form the N-th concave portion are repeated as many times as necessary, and then the mask is completely removed with a strong alkaline solution. A method for producing an embossing roll, comprising applying chrome plating.

Images