JPH0710634B2 - Silk screen printing plate - Google Patents

Description

TECHNICAL FIELD The present invention relates to a plate used in a silk screen printing method.

[Prior Art] Among the so-called indicator lights, there are guide lights installed in corridors of hotels and the like. Guide lights are required to have good visibility so as not to interfere with evacuation guidance.
Indicator lights, such as guide lights, usually have a light source 3 installed in the case 2 as shown in FIG. 4, and a display necessary for guidance such as indicating the evacuation direction is printed on the opening on the front of the case by printing or the like. A translucent display plate 4 is provided, and the display contents of this display plate are made clear by the built-in light source.

In the indicator lamp, as shown in the graph 31 representing the luminance in FIG. 4, the display plate 4 has a phenomenon that the vicinity of the light source is bright and the portion away from the light source is dark. Therefore, the displayed items are difficult to see. The occurrence of such a phenomenon must be avoided in a display light such as a guide light that is strongly required to have good visibility.

Therefore, as shown in FIG. 5, it was considered that a translucency adjusting pattern 43 based on the density of dots was silk-screen printed on a portion of the display plate 4 near the light source 3 in order to suppress translucency. . In the right diagram of FIG. 4, a portion 41 surrounded by a chain double-dashed line shows a portion where display items such as a display necessary for evacuation guidance are displayed, and an outer peripheral portion 42 thereof shows a margin. In this case, it is preferable that the dots forming the light-transmittance adjusting pattern 43 have as small a diameter as possible.

[Problems to be Solved by the Invention]

However, in silk screen printing, when the ink particles pass through the gaps between the eyes of the plate, they gradually dry and adhere to the plate, so the dots of the dots gradually become smaller and eventually cause clogging. I can't print. Specifically 30
With 0 #, the gap is about 50 μm, and with solvent-based ink it is possible to print a printing pattern with φ5 μm dots.
I was able to print only about 10 sheets.

The clogged plate can be used again if it is cleaned and the clogging is removed, but the frequency of cleaning depends on the drying speed of the ink, and therefore varies depending on the ambient temperature, humidity, and wind speed of the printing place. Therefore, one sample is prepared, and the quality of the plate is judged by comparing it with the sample. However, with this method, there is a large variation in the inspection results depending on the person who inspects, and there is a risk that printing will continue as it is, even for a plate that causes clogging. In the display board printed with the plate with the clogging, the pattern for adjusting the light transmittance is incomplete, so that the difference between the lightness and the darkness on the display surface becomes rather conspicuous and the display item becomes difficult to see. If the display board is for a guide light, it is necessary to avoid a decrease in its visibility because it hinders evacuation guidance.

The present invention has been made in view of such circumstances,
It is an object of the present invention to provide a silk screen printing plate that makes it easy to inspect a plate clogging state and does not cause variations in inspection results due to people.

[Means for Solving the Problems]

In order to solve the above problems, the silk screen printing plate according to the present invention, in the margin of the portion where the necessary printing pattern is arranged, silk screen printing is performed together with the printing pattern, the printing ink generated at that time A printing pattern for clogging determination is provided to determine the clogging situation. In this case, the print pattern is represented by dots, and the dot eye diameter of the clogging determination print pattern should be approximately equal to or smaller than the minimum eye dot diameter of the required print pattern. Is preferred.

The "necessary printing pattern" shown in the silk screen printing plate according to the present invention is not limited to the above-mentioned light transmittance adjusting pattern. In short, any printing pattern can be applied to silk screen printing. Next, even when this required print pattern is a light transmittance adjustment pattern, not only the light transmittance adjustment pattern, but also a print pattern for an originally necessary display such as an evacuation display. May also be expressed together.

The clogging determination print pattern represented in the margin is best represented by dots, but it also includes those represented by other than dots.

The silk screen printing method performed by using the silk screen printing plate provided with the clogging determination print pattern is not different from the commonly used method. In short, the only difference is that the plate according to the present invention is used as the plate.

Judgment of clogging can be made, for example, by seeing through a light on a transparent display plate silk-screen printed using this plate, and whether the judgment pattern has changed from its original shape, has become smaller, or has disappeared. And so on.

The silk screen printing method performed by introducing this determination method may be a method in which only the plate provided with this printing pattern for determining the clogging is used and the clogging situation is determined as the printing progresses. But first,
Perform printing using the plate on which this printing pattern for clogging judgment is made, and empirically grasp how many sheets should be printed to prevent clogging. Printing is performed using a plate that has or does not have a print pattern, but each time it does not judge the clogging situation, it automatically automatically without judging each time the number of sheets leading to the clogging mentioned above is reached. Alternatively, the plate may be cleaned or replaced with a new plate if necessary after making a judgment just in case. When dots represent the printing pattern for clogging determination,
A dot pattern with different eye diameters is used as a clogging determination print pattern, and see how many sheets print the large ones to cause the clogging, and how many prints the small ones cause the clogging. With this, it is possible to empirically determine the clogging.

[Action]

If the printing pattern for clogging determination is displayed in the margin of the silk screen printing plate, only the clogging determination pattern appears in the margin of the printed matter independently from the original display pattern, so it is easy to distinguish. Judgment of jam condition is easy and reliable.

If the print pattern is represented by dots and the eye diameter of the dot for the clogging determination print pattern is set to be approximately equal to or smaller than the smallest dot diameter of the required printing pattern, the clogging determination will be safe. Can be done by the side.

〔Example〕

FIG. 1 shows a first embodiment of a silk screen printing plate according to the present invention. This plate 1 was produced to print a light-transmittance adjusting pattern on a light-transmitting display plate. As shown in the figure, in order to obtain a translucency adjustment pattern in which dots are arranged in a part close to the light source (center part), a part corresponding to a part for displaying evacuation guidance of the printed material, etc. 11 "Necessary pattern for printing" in the center part of
13 is shown, and in the portion A surrounded by a circle in the blank portion 12, the print pattern for determining the clogging by the dot pattern.
21 are provided. In this case, for example, when the minimum diameter of the eyes of the dots forming the print pattern 13 required to represent the light transmittance adjustment pattern is φ20 μm, the margin 12 has
It is better to provide a dot pattern having a diameter D ₂₁ = φ15 μm smaller than this minimum diameter. When the number of printed sheets progresses and the pattern of φ15 μm disappears, printing is temporarily stopped here and the plate is cleaned. By doing so, the clogging condition of the plate is detected depending on the presence or absence of the clogging determination pattern on the display plate, so that there is no variation in the results depending on the person who inspects and it is possible to provide a display plate with good visibility. .

In the second embodiment, as can be seen in FIG.
A dot clogging determination print pattern is provided for the pattern 31 with an eye diameter D ₃₁ = φ15 μm, and an eye diameter D _32.
= Φ10 μm pattern 32, eye diameter D ₃₃ = φ5 μm pattern 33, and a plurality of patterns are provided stepwise. In this case, since the progress of clogging can be empirically grasped over time, it is possible to plan for stopping the printing process, carry the display board to the printing equipment, set up the ink mixing amount, etc. The efficiency of the whole process can be measured.

In the third embodiment, as shown in FIG. 3, the dots corresponding to the clogging determination print pattern are represented by a picture 41, a character 51, and a product number 61.
・ It is used for a part of 62 etc. In this case, for example, "ja
When the "j" dot in "pan" disappears and becomes "J", the plate 1 is cleaned. By adopting such a clogging determination print pattern, it is possible to provide a printed matter that does not look uncomfortable even if the user sees the margins of the printed matter such as the display plate. The pattern inside the circle C in FIG. 3 uses the dot pattern of the second embodiment in combination with a figure.

The silk screen printing plate according to the present invention is not limited to the configuration of the above embodiment.

〔The invention's effect〕

According to this invention, since the clogging determination print pattern is disposed in the margin of the silk screen printing plate, the clogging situation can be determined from the printing situation of the determination pattern in the margin of the printed matter printed using this. It can be judged reliably, objectively, and easily. Therefore, it is possible to prevent defective printing due to variations in the inspection result of the inspector, and it is possible to stably provide a high-quality silk screen printed product, so that the production efficiency of silk screen printing is improved. When this plate is used to print a guide plate for guide lights,
The obtained display board has a highly visible evacuation guidance effect.

[Brief description of drawings]

FIGS. 1, 2 and 3 are shown together with a first embodiment, a second embodiment and a third embodiment of a silk screen printing plate according to the present invention, together with a partially enlarged view of a main part thereof. FIG. 4 is a cross-sectional view showing the indicator lamp, and FIG. 5 is a plan view showing the surface of the display plate. 1 …… Silk screen printing plate, 12 …… Margin, 13 ……
Printing pattern for adjusting light transmittance (necessary printing pattern), 21
・ 31 ・ 32 ・ 33 ・ 41 ・ 42 ・ 43 ・ 51 ・ 61 ・ 62 …… Print pattern for clogging judgment.

Claims (2)

[Claims] 1. A clogging determination print pattern for determining a clogging condition of printing ink, which is generated by silk screen printing together with a printing pattern in a margin of a portion where a required printing pattern is arranged. A silk screen printing plate that is arranged. 2. The print pattern is represented by dots, and the eye diameter of the dot for the clogging determination print pattern is substantially equal to or less than the diameter of the smallest eye dot in the required print pattern. Silk screen printing plate.