JPH0848025A - Printing screen - Google Patents

Abstract

PURPOSE:To obtain a printing member good in printing accuracy by a small printing pattern by providing short strip like diffusion preventing plates on a screen so as to hold a printing part therebetween in such a state that the long axes thereof become parallel to the moving line of a squeegee. CONSTITUTION:Short strip like diffusion preventing plates 7 hold the printing pattern provided to a printing part 3 therebetween and are fixed so that the long axes thereof are almost in parallel to the moving line of a squeegee 2. Paste 4 is injected in the space between the short strip like diffusion preventing plates 7 on the screen 6 and the leading end rubber of the squeegee 2 is brought into close contact with the printing part 3 to slide the squeegee 2 in the direction shown by an arrow to apply printing to a printing member. At this time, the attaching positions of the short strip like diffusion preventing plates 7 are regulated corresponding to the size of the printing part 3 and the paste 4 can be injected when the squeegee 2 is slid so as to be prevented from overflowing the short strip like diffusion preventing plates 7. By this constitution, a printing member good in printing accuracy can be obtained by a small printing pattern without diffusing the paste.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing screen for screen printing.

[0002]

2. Description of the Related Art FIG. 3 is an explanatory view of conventional screen printing, in which 1 is a scraper, 2 is a squeegee, 3 is a printing section,
Reference numeral 4 is a paste, 5 is a printed material, and 6 is a screen. This screen printing method is not limited to ceramic printing,
It is widely used such as paper, textile products, various plastic products, thin metal plates, and processed wood products. The scraper 1 coats the paste 4 on the printing portion 3 and the tip rubber of the squeegee 2 is printed on the printing portion 3. The squeegee 2 is brought into close contact with the body 5 to print on the printed body.

[0003]

In such a conventional screen printing method, when the printing portion of the screen is about 1/3 the size of the screen, the printing accuracy is improved, but the paste spreads on the screen, There is a possibility that the printed material may be scratched, and it is necessary to increase the paste injection amount.

Further, when the printing section becomes smaller, the outflow to the peripheral area increases and the efficiency of the amount of paste used is poor.

Therefore, the cost of the paste is not always practical.

Therefore, an object of the present invention is to provide a simple structure,
An object of the present invention is to provide a printing screen when a printing pattern is made small in screen printing.

[0007]

In order to achieve the above-mentioned object, the present invention provides a strip-shaped diffusion preventive plate on a screen with a printing portion sandwiched therebetween and a major axis of which is substantially parallel to the flow line of a squeegee. The feature is that it is provided.

Further, the present invention is characterized in that a strip-shaped diffusion preventing plate is detachably provided.

[0009]

In the screen printing, by providing the strip-shaped diffusion preventing plate on the printing screen, the amount of the paste used can be controlled depending on the size of the printed material, so that the paste does not diffuse on the screen. A constant paste can always be dispensed on the screen. In addition, since the usage status of the paste can be easily managed, the printed material does not fade due to insufficient supply of the paste.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a conceptual view of one embodiment of a printing screen of the present invention, FIG. 2 is a cross-sectional view thereof, 1 is a scraper, 2 is a squeegee, 3 is a printing portion having a print pattern formed, and 4 is Paste 5 is a printed material, 6 is a screen, and 7 is a strip-shaped diffusion prevention plate. The strip-shaped diffusion prevention plates 7 sandwich the printing pattern provided in the printing unit 3 and fix the major axis thereof substantially parallel to the squeegee flow line.

Here, the strip-shaped diffusion prevention plate 7 is made of synthetic rubber and strongly bonded so that the paste does not leak.

The strip-shaped diffusion prevention plate 7 has a structure in which the mounting position can be adjusted appropriately depending on the size of the printing unit 3, and is adhered to the printing unit 3 with an interval of about 50 to 100 mm, substantially parallel to the squeegee flow line. It For the adhesion, an ordinary adhesive can be used, but by using an adhesive such as a double-sided tape, the adhesive can be made detachable.

Next, using ceramics as the printing body 5, the printing screen of the present invention was applied to continuous screen printing to see the effect. The paste 4 is poured between the strip-shaped diffusion prevention plates 6 on the screen, the tip rubber of the squeegee 2 is brought into close contact with the printing portion 3, and the squeegee 2 is slid in the direction of the arrow in FIG. To print.

At this time, the attachment position of the strip-shaped diffusion prevention plate 7 is adjusted according to the size of the printing portion, and when the squeegee 2 is slid in the direction of the arrow 7, the paste is removed from the strip-shaped diffusion prevention plate 7. You can control and inject the paste so that it does not overflow.

In the past, when the print pattern on the screen became about 1/3 of the size of the screen, the paste was diffused on the screen and the printed material was blurred. By attaching the paste, it is possible to form a printed material with a small printing pattern and high printing accuracy without spreading the paste.

In the above embodiment, the paste has a viscosity of 30.
When the poise was 0 poise or less, the paste was diffused on the screen, and the printed material was blurred when printed 100 times continuously. However, by attaching the strip-shaped diffusion prevention plate 7, it was possible to print 400 times continuously. .

In the present embodiment, the printing method of the screen printing of ceramics has been described, but the paper, the textile product, various plastic products, the thin metal plate, the processed wood product, and the glass can also be used on the screen by using the present invention. 1 / of
Printing with a size of 3 or less is possible. In addition, it is very economical because the amount of paste used can be controlled.

[0018]

As described above, with the structure in which the strip-shaped diffusion preventing plate is attached, a printed material with a small printing pattern and high printing accuracy can be obtained, and the use efficiency of the low-viscosity paste can be improved. Further, according to the present invention, since the amount of paste used can be controlled, the cost of the paste can be reduced.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a screen that is an embodiment of the present invention.

2 is a sectional view of the embodiment shown in FIG.

FIG. 3 is an explanatory diagram of conventional screen printing.

[Explanation of symbols]

 1 scraper 2 squeegee 3 printing part 4 paste 5 printed material 6 screen 7 strip-shaped diffusion prevention plate

Claims (2)

[Claims] 1. A printing screen comprising a strip-shaped diffusion prevention plate provided on the screen so as to sandwich the printing part and whose major axis is substantially parallel to the flow line of the squeegee. 2. The printing screen according to claim 1, wherein a strip-shaped diffusion prevention plate is detachably provided.