JPS5995143A - Manufacture of coated steel plate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention Generally, decorative patterns on the surface of painted steel plates that require processing such as bending and drawing are created by offset printing or silk screen printing, but these require a printing process and a subsequent drying process. It was large and required complicated equipment. Furthermore, as the number of colors increases, the number of equipment also increases in proportion to the number of colors, and the work efficiency for changing patterns, changing colors, etc. is also very different.

The present invention has been devised to eliminate the above-mentioned drawbacks, and by using transfer paper on which a pattern of the desired color tone is printed on a painted steel plate in advance with heat transferable ink containing pigment or dye, To provide a method for manufacturing a coated steel plate which allows multicolor printing with extremely simple equipment and transfer without requiring complicated operations such as changing plates and changing two colors.

In Fig. 1, 1.1 is a heated roll machine, 2 is a flat coated steel plate with a coating layer 3 formed on its surface, and 4 is a transfer paper with an arbitrary pattern printed on one side with thermal transfer ink 5. For example, using Dry-O-Print manufactured by Dai Nippon Printing or Printex manufactured by Toppan Printing, a pattern drawn with thermal transfer ink 5 is transferred to the painted surface of the coated steel plate 2 by applying a certain pressure and heat. be.

That is, by passing the coated steel plate 2 and the transfer paper 4 in a stacked state between the heating roll machine 1.1, a constant pressure and heat are applied to the coated steel plate 2 and the transfer paper 4. As a result, the thermal transfer ink 5 of the transfer paper 4 is transferred onto the upper surface of the coating layer 3 of the coated steel plate 2.

Figure 2 shows a case where a pattern is formed on a painted steel plate by sublimation using a heat press machine. The coating layer 9 of the painted steel plate 8 is dyed 9' by applying constant pressure and heat at step 10 and sublimating the dye in the ink.
It is designed to form a pattern by folding it. The pressure at this time was 9/cr at 015~5! A suitable temperature is about 200°C.

In the present invention, as described above, a transfer paper on which heat-melting ink has been printed on one side is superimposed on the painted surface of a flat coated steel plate coated with 1% paint, and a certain amount of heat and pressure is applied. Because it is transferred by melting or sublimation to form a predetermined pattern on the painted surface, multicolor printing is possible with very simple equipment, and it does not require complicated work such as changing plates or changing colors. This method is suitable for mass production and has the remarkable effect of significantly reducing costs. Fig. 1 is a schematic diagram of the configuration of the apparatus used in the present invention, Fig. 2 (A), (B) shows another embodiment of the device used in the present invention, the former being a side sectional view when pressurized, and the latter being a side sectional view when pressurization is released.

2 (8): Painted steel plate, 4 (6): Transfer paper.

Claims (1)

[Claims] 1 Transfer paper with hot-melt ink printed on one side is placed on the painted surface of a painted steel plate in the form of a flat plate, and a certain amount of heat and pressure is applied to transfer by melting or sublimation. A method for manufacturing a coated steel plate, characterized by forming a predetermined pattern on the surface.