JPH062295A - Method for making watermarking net - Google Patents

Abstract

PURPOSE:To directly make a watermarking net on a circular net or wire net on the curved surface of a dandy roll and to easily remove only a watermarking mold after use. CONSTITUTION:A printing screen plate 3 is prepared from any master drawing, and on a circular net or in such a state that a wire net is wrapped on the cylinder of a dandy roll 4, a pattern is printed 7 on any site using screen printing ink 5 with such viscosity as not to allow printed drawing lines to flow, and the ink is then sprinkled with a powdery expandable resin 8 followed by melting and expanding the resin through hot air at ca.100 deg.C to set the resin on the wire net, forming a projected pattern. The pattern is melted with hot air at ca.120 deg.C and removed after use.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preparing a scoop net used in a cylinder or dandy roll of a paper machine and a method for recycling a scoop net.

[0002]

2. Description of the Related Art The conventional method for producing a scraping net is a method of preparing a scraping die in advance by electroforming or wire and soldering it on a wire mesh, or [JP-A-50-157611 (Title of Invention; As described in "Shape-shaped manufacturing method)", a pattern is formed on a metal mesh with a liquid photosensitive resin, and the resin is cured by ultraviolet rays to form a plow mesh.

[0003]

In the conventional method, a flat wire mesh is fitted with a plow-up mold and then wound around a net or a dandy roll. However, the workability was poor because the portion to which the plow-up mold was attached was difficult to bend. Further, since the scraper mold is adhered to the wire net by soldering or the like, it is difficult to remove the scraper mold and reuse the wire net. The present invention has been made based on the above circumstances, while the wire mesh is still wound around the cylinder of the net or dandy roll, to produce a plow mold, and when unnecessary, there is no adverse effect on the wire mesh of the net or dandy roll. It is intended to easily remove only the plow mold without giving it.

[0004]

[Means for Solving the Problems] To the extent that a printing screen does not flow when a screen screen for printing is made from an arbitrary original drawing that is desired to have a rake pattern and a wire net is wound around a cylinder of a cylinder or dandy roll. A pattern is printed at an arbitrary position using a screen printing ink having a viscosity of, and a powdery foamable resin is sprinkled on the ink film to give about 100
The resin is melted and foamed by blowing hot air of ° C and naturally cooled to form a convex pattern on the wire mesh. Further, the resin can be completely removed from the wire netting by melting the plow mold thus produced with hot air of about 120 ° C.

[0005]

With the cylinder or dandy roll set in the paper machine, the scraping mold can be attached and detached in a short time, and the scraping pattern can be easily changed.

[0006]

[Example] A positive type plow pattern (1) shown in FIG.
200li with a screen plate making machine shown in Fig. 2 and a screen plate frame (2) [made of vinyl chloride].
A ne / in screen printing plate (3) was prepared. As shown in FIG. 3, the screen printing plate (3) was fixed at an arbitrary position on a wire net or a dandy roll (4), and a colored screen ink (5) was used on the wire net. Printing is performed by the squeegee (6). An appropriate amount of powdery foaming resin (8) is sprinkled on the ink film (7) printed on the wire mesh immediately after printing as shown in FIG. A polyamide resin or the like is used as the foaming resin (8). As shown in FIG. 5, hot air of about 100 ° C. is blown by the hot air generator (9) to melt the foamable resin (8) to melt and foam, and then naturally cooled to prepare a plow mold (10). did.
In addition, after using the scraping net, in order to remove only the scraping mold, as shown in FIG. 6, when the scraping mold is melted with hot air at about 120 ° C., the resin is completely removed from the wire mesh. I was able to. There was no change in the wire mesh.

[0007]

As described above, by using the manufacturing method of the present invention, it is possible to directly attach and detach the plow mold to the wire mesh in the curved state while the cylinder or the dandy roll is set in the paper machine, Furthermore, the wire mesh can be used any number of times, and the pattern can be easily changed.

[Brief description of drawings]

FIG. 1 is a diagram of a positive type plow pattern used in the present invention.

FIG. 2 is a diagram of a screen printing plate produced based on the original drawing of FIG.

FIG. 3 is a diagram showing a state in which a screen screen is fixed and printed at an arbitrary position on a metal net of a circular net or a dandy roll.

FIG. 4 is a view showing a state in which a foaming resin is sprinkled on an ink film printed on a wire mesh.

FIG. 5 is a view showing a state in which a foamable resin is fixed by a hot air generator.

FIG. 6 is a view showing a state in which a foamable resin is melted in a hot air generator.

[Explanation of symbols]

 1 Plow pattern 2 Screen plate frame 3 Screen plate surface 4 Cylinder or dandy roll 5 Colored screen ink 6 Squeegee 7 Ink film 8 Foaming resin 9 Hot air generator 10 Pourer mold 11 Melted Part of plow mold

Claims (2)

[Claims] 1. A printed pattern is printed on a wire net or a dandy roll wire net of a paper machine, and a foaming resin is sprinkled on the ink film and fixed with hot air to form a convex pattern on the wire net. A method for producing a scraping net, which is characterized in that 2. A convex pattern formed on a wire mesh by printing a plow pattern on a wire net or a dandy roll wire mesh of a paper machine, sprinkling a foaming resin on the ink film and fixing it with hot air. A method for reusing a scraping net, characterized in that the air is removed with hot air.