JPS6359859B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an embossing plate that is capable of reproducing fine irregularities extremely faithfully to the original. Conventional embossed plates have been manufactured using mechanical methods such as mills, high-frequency welders, etc., but there is a limit to the reproducibility of the embossed shape, making it difficult to faithfully reproduce the surface shape of natural wood, leather, etc. I couldn't do it. Another method is to create a reverse mold by pouring silicone resin directly onto the surface of the document, then pouring silicone resin again on the surface of the original after applying a mold release agent to create a reverse mold, and then electroforming from that mold. Therefore, there is a method of manufacturing an embossed plate, but it is essential to apply a mold release agent to create a reverse mold by pouring silicone into a reverse mold of silicone, and therefore it is difficult to make fine shapes on the surface of natural wood etc. I couldn't reproduce it. The present invention has been made in view of the above-mentioned points, and is an object of manufacturing an embossed plate from a manuscript without using any mold release agent by using a resin that is releasable to silicone. be. Next, the present invention will be explained in detail with reference to the drawings. That is, as shown in Fig. 1, a manuscript 1 made of natural wood, leather, cloth, etc. is sealed, sanded, painted, etc. as necessary, and then degassed silicone for casting is poured. A silicone inverted mold 2 is created, and then, as shown in Figure 2, a flexible or flexible and conductive casting resin other than silicone is poured into the silicone inverted mold 2 to form the same surface shape as the original. Create type 3 with Next, as shown in FIG. 3, a metal electroforming mold 4 is formed on the surface of the mold 3 by electroforming. At this time, if the mold 3 is made using a resin that has only flexibility, that is, does not have conductivity, electroforming may be performed after providing a conductive film on the surface of the mold 3. Then, by peeling off the mold 3, a metal electroforming mold 4, ie, an embossed plate, is obtained as shown in FIG. The embossing plate shown in FIG. 4 is a sheet-like embossing plate, that is, an embossing plate, but according to the present invention, an embossing roll can also be made. That is, as shown in FIG. 5, the mold 3 is rolled into a cylindrical shape with the surface facing inside, and the inside is electroformed to form the electroforming mold 4.
form. Next, as shown in FIG. 6, the core 5 is inserted into the remaining space inside the cylinder, and after filling with the core material 6, the outer mold 3 is peeled off to obtain the embossing roll 7. The manuscript is selected from any material such as natural wood such as veneer, leather, cloth, etc., and its surface is adjusted as necessary by sanding, sealing, painting, etc. The silicone used for casting is sufficiently degassed so as to reproduce the minute surface shape of the original. Further, it is poured onto the original to form a layer with a thickness of 3 m/m or more. The casting resin other than silicone used to create mold 3 must have mold releasability against the silicone and the electrodeposited material by electroforming, and must also have conductivity itself so that electroforming can be performed. be. In order to impart conductivity to the resin, methods such as mixing conductive carbon into the resin can be considered, but in some cases, a conductive film may be provided on the surface after casting. Since the thickness of this conductive film is very thin, there is no concern that it will have an adverse effect on the reproduction of the surface shape, unlike the release agent used in conventional methods. As described above, in the present invention, the mold is made from the original without using any mold release agent, so the surface shape of the original can be faithfully reproduced, and since a flexible resin is used, it is possible to make a mold from the original. It is easy to remove from the reverse mold or electroforming mold, and it is of course possible to roll it into a cylindrical shape. In addition, since resin for casting is used, workability is also good. Example A veneer whose surface has been sanded is used as a manuscript, and a 3 m/m thick film of silicone (catalyzed silicone KE112RTV manufactured by Shin-Etsu Chemical Co., Ltd.) that has been vacuum degassed for 10 minutes is formed on the surface. After pouring it in the same way and leaving it for 24 hours to harden, remove the mold from the manuscript and create a silicone reverse mold. Next, the thickness of the urethane resin with the following formulation is 3m/m.
After pouring and leaving it for 24 hours, remove it from the silicone inverted mold to create a urethane mold.

[Table] Mix ○A and ○B and stir → Vacuum defoaming for 5 minutes
Next, the urethane mold is rolled into a cylindrical shape so that the surface is on the inside, and electroforming is performed from the inside to form an electroforming mold on the surface of the urethane mold. Next, the core was inserted after alignment, and the space between the core and the electroforming mold was filled with epoxy resin and cured, and then the urethane mold was removed to obtain an embossing roll.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and Fig. 1 shows a state in which silicone is poured onto a manuscript, Fig. 2 shows a state in which casting resin is poured into an inverted mold of the obtained silicone, and Fig. 3 shows a state in which a casting resin is poured into an inverted mold of the obtained silicone. Figure 4 shows the electroformed surface of the resin mold, Figure 5 shows the electroformed inside of the cylindrical resin mold, and Figure 6 shows the core material inserted and filled. FIG. 3 is a cross-sectional view showing an embossing roll obtained by removing the resin mold after the molding. 1... Manuscript, 2... Silicone reverse mold, 3...
Mold, 4... Electroforming mold, 5... Core, 6... Core material, 7...
...Emboss roll.

Claims (1)

[Claims] 1 Use veneer, leather, etc. as a manuscript, apply sealing, sanding, painting, etc. as necessary, and then pour defoamed silicone for casting to create an inverted mold. A mold with the same surface shape as the manuscript is made by pouring a casting resin other than silicone that has properties and conductivity, and the mold is rolled into a cylindrical shape with the surface facing inside, and the inside is electroformed. A method for producing an embossing plate, which is characterized by producing a metal electroforming mold, inserting a core into the remaining space inside the cylinder, and peeling off the outer resin mold after filling the core material.