JPH0124078B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and an apparatus for embossing sheet-like materials, and the present invention relates to a method for embossing sheet-like materials, and the present invention relates to a method and an apparatus for embossing sheet materials, and the present invention relates to a method for embossing sheet-like materials, and the present invention relates to a method for embossing sheet-like materials, and the present invention relates to a method for embossing sheet-like materials, and the present invention relates to a method for embossing sheet-like materials, and the present invention relates to a method for embossing sheet-like materials, and the present invention relates to a method for embossing sheet-like materials, and the present invention relates to a method for embossing sheet-like materials, and the present invention relates to a method for embossing sheet-like materials, and the present invention relates to a method for embossing sheet-like materials, and the present invention relates to a method for embossing sheet-like materials, and the present invention relates to a method for embossing sheet-like materials, and the present invention relates to a method for embossing sheet-like materials, and the present invention relates to a method and an apparatus for embossing a sheet-like material. You can easily add a three-dimensional valley-dyed embossed pattern to materials, etc., and the color of the valley-dyed pattern,
It is an object of the present invention to provide a method and apparatus for embossing a sheet-like material with valley dyeing, in which the pattern etc. can be easily changed.

The protrusions of a metal embossing roll (hereinafter referred to as the emboss roll), on which any elaborate design has traditionally been engraved or etched, are colored using a gravure printing method, and at the same time, continuous rotary printing is performed on the printing material. The valley dyeing embossing method for synthetic resin sheets and the like is well known.

However, the conventional valley dyeing embossing method is a rotary printing method that reproduces elaborate and beautiful designs by applying color to the entire convex part of the embossing roll.
It is not possible to arbitrarily and easily change the design by adding non-colored or different colored parts, and it is suitable for manufacturing large quantities of products with heavy designs, but for this purpose, expensive embossing rolls are required for each pattern and each color. In addition, replacing the huge and heavy embossing roll requires a lot of effort and time, resulting in poor productivity.
It was not suitable for manufacturing products with a wide variety of products in small quantities and with clever designs.

In addition, in the field of interior decoration materials such as wall covering materials using synthetic resin sheets, etc., as home environments and design tastes become more diverse, increasingly expensive and intricate designs are required. There is a growing need for inexpensive decorative materials with hidden patterns and watermark designs that can be easily changed to suit changing tastes, but there are some products with flat printed patterns that can be found here and there. However, there were no three-dimensional valley-dyed embossed designs.

The inventors of the present invention have focused on the technical background and social needs as described above, and as a result of intensive research, they have found that by adopting the configuration described in the claims, patterns and colors can be easily changed, and light animation can be created. It was possible to obtain a sheet-like product with beautiful valley-dyed printing such as a hidden pattern pattern, a hidden pattern pattern, or a watermark pattern pattern.

The drawings show one embodiment of the present invention, and the present invention will now be explained with reference to the illustrated examples. An embossing roll 1 having an uneven pattern is rotating in the direction of the arrow in the figure, and an embossed pattern is formed on the outer peripheral surface of the embossing roll 1 by engraving or etching, and further, on the outer peripheral surface of the embossing roll 1, Copper plate rolls 3, 3' having letterpress plates 2, 2' made of soft rubber or plastic attached with adhesive to the outer peripheral surfaces of the rolls are rotating in contact with each other, and the letterpress plates 2, 2' of the copper plate rolls 3, 3' are rotating. Mesh rolls 4 and 4' are rotating in contact with the surface of 2', respectively.
The mesh rolls 4, 4' are connected to the ink vats 5,
It rotates in contact with take-up rolls 6 and 6', which are partially immersed in printing inks A and B in 5', respectively.

On the surfaces of the letterpress plates 2 and 2', uneven patterns different from the uneven texture pattern carved on the embossing roll 1 are engraved by engraving, pressing, or the like.

In the illustrated example, two copper plate rolls 3, 3' are attached to the embossing roll 1, but the present invention is not limited to the illustrated example, and the number of plate copper rolls may be one, or three or more. It can also be attached as a rubber roll, or an engraved rubber roll can be used.

Next, to explain the valley-dyed embossing method when a synthetic resin sheet is used as a sheet-like object using an illustrated example, the synthetic resin sheet 7 is heated in the heating device 8 to thermally soften its surface, and then It is inserted between the nip between the rotating embossing roll 1 and the pressing roll 9 rotating in contact with the embossing roll 1.

The sheet-like material used in the present invention can be paper or various synthetic resin sheets having heat-softening properties such as vinyl chloride, polyethylene, etc., foam,
Any non-foamed material may be used, and if necessary, a material to which a base material such as paper, nonwoven fabric, or knitted or woven fabric is attached may be used.

The heating conditions in the heating device 8 and the linear speed of the synthetic resin sheet can be appropriately selected depending on the type of resin of the synthetic resin sheet, etc., but in the case of a vinyl chloride sheet, the heating conditions are approximately 200°C, 10 to 15 seconds, Processing is performed at a linear speed of 6 to 15 m/min.

On the other hand, in the embossing roll 1, the printing inks A and B lifted from the ink pads 5 and 5' by the lifting rolls 6 and 6' are transferred to the mesh rolls 4 and 4', and the excess ink is removed by the doctor knives 10 and 10'. After scraping off, it transfers onto the surface of the letterpress plates 2, 2' on the outer circumferential surface of the plate rolls 3, 3' which are rotating in contact with the mesh rolls 4, 4', and further transfers to the surface of the letterpress plates 2, 2'.
The relief plates 2, 2' formed on the surface of the embossing roll 1 which is rotating in contact with the relief plate 2' from 2'.
The image is transferred to a predetermined portion of the convex portion with a different concavo-convex pattern. However, in carrying out the present invention, it is also possible to omit the take-up rolls 6, 6' and the doctor knives 10, 10', and apply the printing ink directly from the mesh rolls 4, 4' from the ink vats 5, 5'.

The printing inks A and B used in the present invention are those normally used for gravure printing of synthetic resins, etc., and generally a solvent paint for gravure printing using a synthetic resin as a vehicle is used.

As described above, the printing inks A and B applied to the convex portions of the embossing roll 1 are printed on the surface of the synthetic resin sheet 7 which is inserted between the nip between the embossing roll 1 and the press roll 9. In this case, the surface of the synthetic resin sheet 7 has been thermally softened by the heating device 8, and is strongly pressed against the outer peripheral surface of the embossing roll 1 by the press roll 9, so that the convex portions of the embossing roll 1 are made of synthetic resin. At the same time as it bites into the sheet 7, the printing ink A printed on the convex portion,
B forms a valley-dyed embossed pattern printed within the concave portion of the synthetic resin sheet 7 as a color and pattern corresponding to the color pattern of the relief plates 2, 2' bonded on the outer peripheral surface of the copper plate rolls 3, 3'. be done.

That is, the synthetic resin sheet obtained by the present invention has an uneven textured pattern formed by the embossing roll 1, and the concave portions of the uneven textured pattern have the colors and patterns of the relief plates 2 and 2' of the copper plate rolls 3 and 3'. Corresponding colors and patterns can be formed, and therefore, a light anime-like, hidden pattern, or watermark-like valley-dyed embossed pattern can be easily formed.

Since the synthetic resin sheet obtained by the above method is embossed with valley dyeing, the convex parts on the surface of the synthetic resin sheet are not colored and are the color of the base material. By applying a coloring process such as staining, even more diverse color patterns can be created.

In addition, the relief plates 2, 2' bonded to the outer peripheral surfaces of the copper plate rolls 3, 3' can be easily removed and replaced with ones with other patterns, colors, etc. By attaching a copper plate roll with a letterpress pasted to its outer circumferential surface and transferring the printing ink to the embossing roll, it is possible to easily form a variety of valley-dyed embossments. The present invention can be achieved.

Therefore, depending on the demand or preference for products such as wall covering materials for interior decoration or interior materials for vehicles such as automobiles, we have developed a variety of valley dyeing products that can be easily adapted to not only mass production of small products but also small production of many products. It is possible to obtain embossed products.

As described above, the present invention makes it possible to easily apply valley-dyed embossing to a sheet-like material, and by combining one or more colors, patterns, etc., the valleys of the embossed pattern can be colored in a variety of complex ways. Not only can you print unique patterns, and can emboss valley dyeing in a light anime style, hidden patterns, or watermark patterns that have never been seen before, but you can also print the colors of the valley dyeing.
Patterns etc. can be easily changed, and it can quickly respond to diversifying social needs, which has great industrial benefits.

[Brief explanation of drawings]

The drawings are explanatory diagrams of one embodiment of the present invention. 1: Emboss roll, 2, 2': Letterpress, 3,
3': copper plate roll, 4,4': mesh roll,
5, 5': Ink vat, 6, 6': Raising roll, 7: Synthetic resin sheet, 8: Heating device, 9:
Press roll, 10, 10': Doctor knife.

Claims (1)

[Scope of Claims] 1. A flexible rubber or plastic letterpress plate with an arbitrary pattern engraved on the outer peripheral surface of the plate cylinder roll is adhered, and the printing ink applied to the surface of the letterpress plate is transferred to an embossing roll having an uneven pattern. 1. A method for embossing a sheet-like material with valley dyeing, which comprises embossing the surface of a synthetic resin sheet with the embossing roll after transferring the image onto the surface. 2. A plate cylinder in which a pressure roll is closely attached to one side of the outer circumferential surface of the embossing roll, and a relief plate that can be easily replaced is adhered to the other side of the outer circumferential surface of the embossing roll. One or more of the rolls are closely attached, and a mesh roll is attached closely to the letterpress surface bonded to the outer peripheral surface of the plate cylinder roll, and the embossing roll, press roll, plate cylinder The roll and the mesh roll are configured to rotate in close contact at the same linear speed, and the printing ink applied to the outer peripheral surface of the mesh roll is transferred to the convex portion on the outer peripheral surface of the embossing roll via the relief on the outer peripheral surface of the plate cylinder roll. 1. A valley-dye embossing device for sheet-like material, characterized in that it is configured to be able to print on a sheet-like material inserted between a nip between a press roll and an embossing roll.