JPH07223309A - Screen processing jig - Google Patents

Abstract

PURPOSE:To provide a screen processing jig which can perform positioning of a film to a frame by only setting up the film to a regular position and pressing an aluminum frame of a screen process aginst the film. CONSTITUTION:This jig is formed into an L-shaped state, possesses two pieces of fitting projections 2a and one piece of a fitting projection 3a respectively on the insides of one crossarm 2 and the other arm 3 and the top is provided with a plurality of cylindrical projections 3c fitting in the positioning part of them film.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen plate making jig, and more particularly to a screen plate making jig for positioning a film on which an image is drawn when setting the film on the frame of the screen plate making. .

[0002]

2. Description of the Related Art Usually, label printing on compact discs (CD) and the like is performed by screen printing or offset printing. Screen plate making in screen printing is generally made as follows. First, a silk (nylon) mesh is attached to a square frame 10 made of aluminum as shown in FIG. Next, a photoresist which is sensitive to ultraviolet rays is applied, and a film is attached thereon and dried. After drying, peel off the attached film and attach the positive film with the image on the silk mesh.

In this case, a center mark (commonly referred to as a register mark) drawn in the center of the positive film is aligned with a mark of a jig formed to have the same size as the frame 10 to form the positive film and the frame 10. The position is decided. Further, in this case, the positive film adheres to the mesh due to static electricity generated by peeling off the film first adhered to the mesh.

Next, the frame 10 is set in an exposure machine,
Ultraviolet rays are irradiated to draw a pattern on a photoresist using a positive film as a mask. Then, the portion of the photoresist not exposed to ultraviolet rays is washed away by washing with water and dried. Further, weak ultraviolet rays are irradiated again to fix the image. When a negative film is used instead of the positive film, a photoresist having the opposite property is used.

The screen printing plate thus prepared is set in a screen printing machine, brought into close contact with a CD or the like, and ink is applied from above to perform label printing. In recent years, multicolor designs are becoming more popular, and in that case, screen printing is made by the number of the colors and overprinting is performed.

[0006]

However, in the method described above, that is, in the method of visually aligning the mark provided on the jig with the center mark of the film on which the image is drawn, the setting is performed. There are individual differences in accuracy, and it takes time to set. In particular, in the case of multicolor printing, the positions of the films may not be aligned, which causes a problem with the recent demand for improved image resolution. Further, if there is a variation in the dimensions of the aluminum plate 10 for screen printing, the position of each image may shift when the screen printing is set in the screen printing machine.

It is an object of the present invention to provide a screen plate making jig capable of positioning the film with respect to the frame only by setting the film at a prescribed position of the jig and pressing an aluminum frame of the screen plate against the jig.

[0008]

A screen plate making jig according to the present invention is formed in an L shape, has a plurality of engaging projections for engaging with a screen plate making frame, and has a film on its upper surface. It is characterized in that a plurality of engaging portions that engage with the positioning portion of are provided.

Further, in the screen plate making jig according to the present invention, the engaging projections are two inside the one arm and one inside the other arm of the L-shape. Conveniently, the engagement portion is two cylindrical protrusions or two holes.

[0010]

With the above-described structure, when a screen printing plate is made, first, as in the conventional case, a silk mesh is attached to a square frame made of aluminum or the like. In some cases, the one originally attached with silk mesh is used. Next, apply a photoresist sensitive to ultraviolet light to the mesh and dry it.

Next, the screen plate-making jig according to the present invention is set on the glass surface of the exposure machine, and a positioning portion, such as two round holes, provided in advance on the film on which the image is drawn is provided with the screen plate-making plate. The film is attached by fitting the engaging portion provided on the upper surface of the jig for use, for example, a cylindrical protrusion. Subsequently, when the aluminum frame is applied to the inside of the screen plate making jig, the outer side of the aluminum frame comes into contact with the engaging projections provided inside the screen plate making jig. In this state, the positions of the film and the frame are determined.

Then, in this state, ultraviolet rays are irradiated to draw a pattern using the film as a mask on the photoresist. Subsequently, by washing with water, the portion of the photoresist that has not been cured by ultraviolet rays is washed away and dried. Furthermore,
Irradiate weak UV rays again to fix the image.

The completed screen printing plate is set on a screen printing machine which is provided with the same engaging projections as the screen printing plate jig in advance and brought into close contact with a CD or the like, and ink is applied from above to perform label printing. . In case of multi-color design, make screen stencil for the number of colors and overprint.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 (a) to 1 (c) show an example of a screen plate making jig according to the present invention, wherein (a) is a plan view,
(B) is a side view and (c) is a rear view.

As shown in the figure, the screen plate making jig 1 is made of a metal having a thickness of 10 mm and is formed in an L shape. The shorter arm 2 has a length of 260 mm and a width of 30 mm. The longer arm 3 has a length of 315 mm and a width of 300 mm. Also, two protrusions 2a are provided inside the shorter arm 2 at regular intervals. One of the protrusions 2a is about 40 mm from the end of the arm 2 and the other is 155 mm. It is provided in the place. Further, on the inside of the longer arm 3, one protrusion 3a is provided approximately 40 mm from the end of the arm 3. These protrusions 2a and 3a have a trapezoidal tip at a tip end as shown in an enlarged view of FIG.
In mm, the width of the tip is about 3 mm and the width of the base is about 5 mm. This tip portion comes into contact with the outer surface of the screen plate-making frame 10 (see FIG. 6).

A part of the upper surface of the longer arm 3 has a length of 1
The stepped surface 3b is recessed by 80 mm, 20 mm in width and several mm in depth, and is provided with two columnar projections 3c on the stepped surface 3b. These cylindrical protrusions 3c
Has a diameter of about 5 mm and an interval of about 120 mm, and is configured in the same manner as the positioning holes provided in the film, and is symmetrically arranged with the center of the step surface 3b as an axis. Note that FIG. 3 is an end view taken along the line AA in FIG. 1A, and shows the shapes of the step surface 3b and the columnar protrusion 3c of the longer arm 3.

Next, a method of using the screen plate making jig 1 will be described with reference to FIG. First, as in the conventional case, a square frame 10 made of aluminum with a silk mesh attached.
Then, a photoresist sensitive to ultraviolet rays is applied and dried.

Subsequently, the screen plate making jig 1 is set on the glass surface of the exposure machine, and the two reference holes 5a provided in advance in the film 5 on which the image is drawn are connected to the screen plate making jig 1 of the screen plate making jig 1. The film 5 is attached by fitting it into the cylindrical projection 3c provided on the upper surface. Next, the aluminum frame 1
When 0 is applied to the inside of the screen plate making jig 1, the outside of the aluminum frame 10 comes into contact with the engaging projections 2a and 3a provided inside the screen plate making jig 1. In this state, the film 5 and the frame 10 can be positioned.

In this state, ultraviolet rays are irradiated to draw a pattern on the photoresist using the film 5 as a mask. Subsequently, by washing with water, the portion of the photoresist that has not been cured by ultraviolet rays is washed away and dried. Further, weak ultraviolet rays are irradiated again to fix the image. The protrusion 2
Since the numbers of a and 3a are three, by simply pressing the frame 10 against the screen plate making jig 1, the contact portion between the frame 10 and the screen plate making jig 1 becomes point contact, and accurate positioning is possible. it can.

The finished screen printing plate is set on a screen printing machine which is provided with the same engaging projections as the screen printing plate jig 1 in advance and brought into close contact with a CD or the like, and ink is applied from above to perform label printing. I did it.

As a result of the measurement, the above screen plate making jig 1
When the plate is made using, the misalignment of each label is 10
It was found to be within 0 μm, and the precision was remarkably improved compared to the conventional 500 μm or more, and sufficient precision for multicolor printing was obtained. Further, the film can be easily positioned, the working time can be shortened, and even if the dimensions of the screen-making aluminum frame 10 vary, the screen-printing machine that attaches the screen-making plate also has a screen-making treatment. Since the structure was the same as that of the tool 1, this variation was absorbed and no print deviation occurred.

Next, a modified example of the screen plate making jig 1 will be described. The same or corresponding parts as those described in the previous embodiment are designated by the same reference numerals and the description thereof will be omitted. As shown in FIG. 5, the screen plate making jig 1 has a longer arm 3 whose upper surface is flat and has two holes 3d instead of the cylindrical projections of the screen plate making jig 1 described above. Is provided. Instead, the film on which the image is drawn is provided with a cylindrical protrusion that fits into this hole 3d, and the film set has a cylindrical protrusion.
It is done by fitting to. The positioning accuracy of the film with respect to the screen plate making frame 10 is exactly the same as that of the above screen plate making jig 1.

[0023]

As described above, when the screen plate making jig according to the present invention is used, the film can be easily positioned with respect to the screen plate making frame, so that the working time can be shortened and the printing accuracy can be improved. And the quality of label printing can be improved.

[Brief description of drawings]

FIG. 1 shows a screen plate making jig of an embodiment of the present invention,
(A) is a plan view, (b) is a side view, and (c) is a rear view.

FIG. 2 is a plan view of engaging projections of the screen plate making jig shown in FIG.

FIG. 3 is an end view taken along line AA of the screen plate making jig shown in FIG.

FIG. 4 is a diagram illustrating the use of a screen plate making jig.

5 is a perspective view of a modified example in which a hole is used in place of the cylindrical protrusion of the screen plate making jig shown in FIG.

FIG. 6 is a perspective view of a frame for screen plate making.

[Explanation of symbols]

 1 Screen plate making jig 2 Shorter arm 2a Engagement protrusion 3 Longer arm 3a Engagement protrusion 3b Step surface 3c Cylindrical protrusion 5 Film 10 Frame (aluminum frame)

Claims (3)

[Claims] 1. An L-shaped member having a plurality of engaging protrusions for engaging with a screen-making frame, and an upper surface provided with a plurality of engaging portions for engaging a film positioning portion. A jig for screen plate making characterized by that. 2. The number of the engaging protrusions is two inside the one arm and one inside the other arm of the L-shape, and the engaging portion is two cylindrical protrusions. The screen plate making jig according to claim 1, wherein 3. The screen plate making jig according to claim 1, wherein the engaging portion has two holes.