JP4380435B2 - Metal building material decoration method - Google Patents

Description

  The present invention relates to a method for decorating building materials such as metal exterior materials, bathroom decorative plates and interior materials.

  Traditionally, to decorate metal building materials such as metal exterior materials, bathroom decorative boards and interior materials, multicolor printing by roll printing equipment such as gravure offset printing, flexographic printing, or by screen printing Decorating was performed by applying an arbitrary pattern or by using a coating machine such as a roll coater, spray, or a sputter coating apparatus (see, for example, Patent Document 1).

  However, when decorating by printing, a dedicated plate is required for each pattern to be printed. In particular, in the case of multicolor printing, only one color can be printed on one plate. A machine was required, which was costly and laborious.

  Also, when painting using a coating machine, compared to the printed one, it was not good looking because it could not produce a realistic expression full of natural feeling.

In addition, since such a printing machine uses an organic solvent-based ink, it adversely affects workers and the surrounding environment.
JP 2001-55825 A

  The present invention has been made in view of the above points, and the object of the present invention is that it does not require a dedicated plate for each picture to be printed and has a good appearance, and further adversely affects the operator and the surrounding environment. An object of the present invention is to provide a method for decorating metal building materials that are not present.

In order to solve the above-mentioned problem, in the invention according to claim 1, a printing process of printing a water-based ink containing an inorganic pigment on the surface pattern of the metal material with the inkjet printer 6, and after the completion of the printing process And a pressing process for forming embossing and unevenness on the metal material by a press mold, and the surface pattern of the metal material printed in the printing process is for aligning with the press mold in the pressing process together with the pattern The mark is printed .

  By adopting such a configuration, it is possible to produce a good-looking metal building material without requiring a dedicated plate for each pattern to be printed, and to prevent adverse effects on workers and the surrounding environment. Can do.

The invention of claim 2 is characterized in that, in the invention of claim 1, in the printing step, a water-based ink is printed and a protective film having weather resistance is formed.

  By setting it as such a structure, it can suppress that a metal building material and its printed part deteriorate over time.

  In the present invention, it is possible to manufacture a good-looking metal building material without requiring a dedicated plate for each pattern to be printed, and to prevent adverse effects on the worker and the surrounding environment. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  Examples of metal building materials include metal exterior materials, bathroom wall materials, interior building materials, and the like. In addition to printing (printing) described later, the metal building material may be formed with 0.1 to 10.0 mm embossment or unevenness on the surface thereof.

  In this invention, it prints on the said metal building material with an inkjet printer. The ink jet printer 6 includes an on-demand method, a charge control method, a method of ejecting ink with a thermal head, and the like. The method of the printer to be used is not particularly limited, but in this embodiment, a commercially available charge control method ink jet printer 6 is used. To do.

  The whole decoration process of metal building materials will be described. In this embodiment, a step of printing on a hoop-shaped metal building material (hereinafter referred to as a printing step) is performed between the uncoiler 1 and the recoiler 2 and a step of forming embossing and unevenness (hereinafter referred to as a pressing step) is performed. .

  First, a hoop-shaped metal plate (hereinafter referred to as a workpiece 3) serving as a metal building material is unwound from the uncoiler 1 while applying tension, and the surface of the workpiece 3 is washed and cleaned by the cleaning device 4.

  Next, printing is performed. At this time, the work 3 is positioned at the printing position on the lower surface of the ink jet printer 6 by the positioning conveyance device 5. The positioning / conveying device 5 grips both ends of the workpiece 3 in the width direction, unwinds the workpiece 3 from the uncoiler 1, positions the workpiece 3 in the width direction, and makes the conveyance speed of the workpiece 3 constant. And it prints on the conveyed workpiece | work 3 with the inkjet printer 6, and this is explained in full detail later. In addition to printing a pattern, a mark for matching with a press die is marked in a later press process. Further, a protective film described later is formed on the printed pattern. The protective film is applied by a roll coater 9 and heated and baked by a baking machine 10.

  The work 3 after the printing is completed is heated and baked by the baking furnace 7 and cooled by the cooling device 8 and then wound by the recoiler 2 to complete the printing process. The process proceeds to a pressing process for forming embossing and unevenness.

  Next, the process proceeds to a pressing step (not shown) for forming embossing and unevenness. The work 3 wound around the recoiler 2 in the printing process is set on the uncoiler in the press process.

  Then, the workpiece 3 is aligned by the marks applied to the workpiece 3 in the printing process by the precision feeding device, and the embossed pattern is pressed by pressing the printed pattern of the workpiece 3 in accordance with the embossed pattern and the uneven portion of the press mold. And formation of an uneven part is performed.

  By the printing process and the pressing process as described above, a real and natural pattern, embossing, and unevenness are formed on the surface of the work 3.

  Hereinafter, printing by the inkjet printer 6 in the printing process will be described.

  The ink jet printer 6 is disposed above the work 3 conveyed between the uncoiler 1 and the recoiler 2, and the nozzles on the lower surface are arranged in parallel in a direction perpendicular to the conveyance direction of the work 3 (that is, in the width direction). The desired colors (white, black, red, yellow, and blue primary colors) are sprayed to synthesize arbitrary colors to print an arbitrary pattern. The nozzles are arranged so as to cover the entire width of the workpiece 3 so that printing can be performed on the entire width of the workpiece 3.

  The ink jet printer 6 uses data stored in a control device such as a sequencer signal conversion device or a personal computer to eject ink from the nozzles onto the surface (upper surface) of the work 3 aligned with the positioning and conveying device 5. Print.

  A nozzle having a diameter of 10 to 100 μm is used. If the nozzle becomes larger than this, clear printing cannot be performed.

  The ink to be used is a water-based ink, and a natural inorganic pigment (particle size 50 to 500 nm) is used for the color pigment in order to ensure weather resistance. By using water-based ink in this way, the operator can work without being adversely affected by the organic solvent in the printing process line as in the case of using organic solvent-based ink. You don't have to drain the water. Moreover, by using an inorganic pigment, it has weather resistance and can suppress aged deterioration.

  Furthermore, after printing with this water-based ink, a transparent protective film having weather resistance may be applied. The protective film is a water-based acrylic clear, fluorine-based or solvent-based clear, and has an effect of blocking ultraviolet rays, and the water-based ink using an inorganic pigment deteriorates over time in order to suppress aged deterioration of the water-based ink. Can be further suppressed.

  When printing with the ink jet printer 6, it is difficult to print an accurate and precise pattern unless the nozzle is brought close to the work 3 to about 1 mm. Therefore, printing on the flat work 3 makes it easy to print accurately and precisely. Become.

  Further, the positioning / conveying device 5 can suppress the feeding error of the workpiece 3 to about ± 5 mm with respect to 100 m, thereby enabling precise pattern printing.

  The designs printed on the work 3 include various things such as photographs taken from nature such as natural stones, wood grain patterns, and mortar spray patterns, patterns synthesized from them, and landscape patterns. There is no particular limitation.

  As described above, in the present invention, the print data for each pattern is controlled by the ink jet printer instead of printing that requires a dedicated plate for each pattern as in the conventional metal building materials. This makes it possible to print various pattern patterns, which eliminates the need for plates such as conventional offset printing and flexographic printing that require a dedicated plate for each pattern. The cost and effort of creating the Further, by using water-based ink, it is possible to prevent adverse effects on workers and the surrounding environment.

It is whole explanatory drawing of the decoration process of this embodiment.

Explanation of symbols

6 Inkjet printer

Claims (2)

A printing process in which an aqueous ink containing an inorganic pigment is printed on the surface pattern of a metal material by an ink jet printer , and a pressing process in which embossing and unevenness are formed on the metal material by a press die after the printing process is completed. wherein, surface texture of the metal material to be printed by the printing step, Kakazari method of metal building materials, characterized in that formed by printed marks for performing alignment in the press die in the pressing process with the picture. 2. The metal building material decoration method according to claim 1 , wherein the printing step forms a protective film having weather resistance after printing water-based ink.

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