JPH0784048B2 - Method of manufacturing embossed plate - Google Patents

Description

Detailed Description of the Invention

 Purpose of the invention

[Industrial applications]

The present invention relates to a method of manufacturing an embossing plate by utilizing a photo retouching process. The present invention is particularly useful for producing an endless pattern embossing plate.

2. Description of the Related Art An embossing roll is used for embossing a plastic film or the like, especially for an endless pattern. There are mill pressing, etching, sandblasting, and other methods to manufacture the embossing roll plate, but the patterns that can be formed by these methods are limited, and it is not possible to reproduce a faithful emboss depending on the original. There is. A laser embossing method has been developed as a method of reproducing embossing that is faithful to the original. This method uses computer graphics technology to edit the pattern on the monitor screen, and can be endless.
However, setting a program for giving an endless procedure to a computer takes a lot of work.

[Problems to be Solved by the Invention]

The object of the present invention is to improve the above-mentioned drawbacks of the prior art and utilize the retouching process of a photograph to make the embossing plate of the embossing roll several steps more troublesome than the conventional method with an endless pattern. It is to provide a method for manufacturing by peeling. Structure of the invention

[Means for solving problems]

The method for producing the embossing plate of the embossing roll of the present invention comprises the following steps, for example, in the case of producing a product having an endless pattern, which is a typical embodiment. A) First, as shown in FIG. 1, the unevenness of the surface of the embossed original 1 is detected by the reading head 4 and converted into the preceding signal by the signal processor 8, B) Also shown in FIG. By exposing the light signal from the exposure head 5 onto the photosensitive film 2A and developing it, the unevenness of the embossed original is expressed in shades to produce a photosensitive film 2B as shown in FIG. , C) In order to apply the necessary retouching treatment to the formed photosensitive film 2B, especially in order to make an endless pattern, the photosensitive film 2B is crossed with the embossing direction, in the example shown in FIG. By cutting at 21, and as shown in FIG. 3, the upper part 22 and the lower part 23 are interchanged and joined, and a retouching process is performed, so that as shown in FIG. Forming film 2C, D) Made of this The use film 2C, as shown in FIG. 5,
The signal is read by the optical read head 6 and the light signal is processed by the signal processor 9.
To convert the signal to drive the engraving head 7, for example, an electric signal, and E) Again, as shown in FIG. 5, the engraving head 7 is driven by the signal to emboss 3 on the surface of the embossing roll material. Be provided. In the example shown in the figure, the process of consistently winding the embossed document around the cylinder with a circular diameter is being proceeded, and this is for convenience of understanding and is recommended in terms of ease of work. This is the right mode. However, if it is possible to reliably synchronize the heads that scan over the document, the photosensitive film or the plate-making film, and the embossing roll material, it is not always necessary to follow this mode. The technician will be disentangled. The embossed plate obtained by the production method of the present invention is preferably plated with chromium on the surface in order to enhance the durability of the plate. As the embossed manuscript, in addition to the wood having the illustrated wood grain, natural materials such as stone, cloth, cork, and leather can be used. As a method for detecting the unevenness of the surface of the embossed original with the reading head, a non-contact method such as an optical method using a laser beam or a method of capturing a change in electrostatic capacity is preferable, but a stylus method, etc. A contact method may be used. For the input and output of information, it is advantageous to turn it into an electrical signal. The analog signal may be used as it is, but it is convenient for processing if the analog signal is converted into a digital signal which is digitized in multiple stages, for example, 64-256 stages. The retouching process may be performed according to a known technique for correcting a photograph. Means for providing irregularities on the surface of the embossing roll include an engraving method using a laser beam such as a carbon dioxide gas laser, an engraving method using an electron beam, and a mechanical engraving method, and any method may be used. As a material for the embossing roll, a commonly used steel roll having a surface plated with copper may be used.

[Work]

As a result of exploring whether there is a simpler method for producing an embossing roll plate, especially a plate having an endless pattern, the inventors arrived at the present invention with the idea of using a photo retouching technique. It was That is, in the method for producing an embossed plate of the present invention, the unevenness of the embossed original is once taken as a photograph, and this photograph is retouched to partially adjust the depth of the embossed original, or unevenness often seen in the embossed original. It is easy to make a plate suitable for embossing roll production by modifying the above. The retouching process is particularly advantageous when making an embossed plate with an endless pattern. The photo retouching process is a task that requires individual skill, but if a skilled technician is available, it is easier than the program setting in the laser embossing method and can be executed in a short time. In addition, even if the type of document changes, it can respond immediately. It is not easy for computer graphics techniques to transfer one type of manuscript, such as wood, to another type of manuscript, such as stone. EFFECTS OF THE INVENTION According to the manufacturing method of the present invention, an embossing roll plate, which also has an endless handle if desired, can be manufactured in a short time and without much labor. This method can be applied to any type of embossed original, and since the pattern, including endless patterns, can be stored in the form of a plate-making film, many rolls can be manufactured and worn rolls can be regenerated. It is convenient to do.

[Brief description of drawings]

FIG. 1 and FIG. 5 are both conceptual explanatory views of the method for manufacturing an embossing plate of the present invention. 2, 3, and 4 are all explanatory views of the retouching process when an endless pattern is produced by the embossing plate manufacturing method of the present invention. 1 ... Embossed original 2A ... Photosensitive film, 2B ... Photosensitive film 2C ... Plate making film 3 ... Embossing 4 ... Read head, 5 ... Exposure head 6 ... Optical read head, 7 ... Engraving head 8,9 …… Signal processor

Claims (3)

[Claims] 1. A method for manufacturing an embossing plate of an embossing roll, which comprises the following steps: A) The unevenness of the surface of an embossed original is detected by a reading head and converted into a light signal, and B) the light signal is exposed. By exposing and developing on the photosensitive film from the head, make a photosensitive film that expresses the unevenness of the embossed original in shades. C) Make the plate for making the plate by performing the necessary retouching process on the made photosensitive film. D) reading this film for plate making with an optical reading head and converting the light signal into a signal for driving the engraving head, and E) driving the engraving head with the signal to emboss the surface of the embossing roll material. Be provided. 2. In the step C), the photosensitive film is cut in a direction intersecting with the embossing direction, the upper part and the lower part are replaced with each other and bonded, and a retouching process is performed to join the patterns of the bonded part together. The method for producing an embossing plate according to claim 1, which is a film. 3. The method for producing an embossed plate according to claim 1, including a step of plating the surface of the embossed plate with chromium.