JP2525094Y2 - Apparatus for producing screen printing plates - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention comprises a screen provided with holes and held by a stretching device, wherein the holes provided are filled with a substance which can be removed later by a laser beam. An electronic scanning-storage device is provided, which is connected to a control for the laser beam, said laser beam removing coating material from the holes at the locations corresponding to the halftone dots. And a device for producing a plate for screen printing.

[0002]

2. Description of the Related Art A screen printing plate is manufactured by an electric method or by coating a screen with a plate film. In the latter case, a photosensitive film layer is formed on a flat body (a cylindrical shape in the case of a rotary screen) such as a perforated foil or a wire mesh. A screen plate is obtained by placing a film on which a desired pattern is drawn on a photosensitive film and exposing the pattern, followed by development. Some of the holes of the screen plate are closed by the cured plate film, while the remaining portions allow ink to pass through.

[0003] The production of such screen plates is very expensive. First, a color separation must be taken for each screen version to be created, and a negative must be created from this. Subsequently, for example, a photosensitive liquid is applied to a foil leaf having holes, and a uniform film layer is formed, followed by drying. In the meantime, the negatives are inspected and corrected, and then a shaded finished film is created in the synthesizer. The size of the finished film is the same as the screen plate to be manufactured. The process of inspecting the finished film and cutting it accurately according to the size of the design and the gravure is a process that requires very much material and labor in film production.
Subsequently, the film is exposed in close contact with the photosensitive film of the screen. The exposed screen is developed and dried by a dryer to harden the photosensitive film. Thereafter, further inspection and correction are required.

[0004] It is clear that such conventional methods are very costly to produce screen plates.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an apparatus for producing a plate for clean printing of the type described at the beginning so that the production cost can be greatly reduced without reducing the precision of the plate. Consists in configuring.

[0006]

SUMMARY OF THE INVENTION According to the invention, the object is to provide a screen, which is a cylindrical foil leaf which is mounted on a tensioning device and which is evenly perforated, and which is used for the foil leaf. A guide is provided in parallel with the setting device, and a rotatable laser deflection mirror is disposed on the guide so as to be movable in the longitudinal direction, and the laser beam is oriented parallel to the guide by a deflection device, and The beam is vertically irradiated on the foil leaf by the laser deflection mirror, and
The storage device is solved in that it is connected to a drive mechanism for the laser deflection mirror or to a stretching device, including the foil.

[0007]

[Advantages of the invention] By using the device according to the invention,
A plate for screen printing can be manufactured without lowering the precision of the plate, and the production cost caused at that time can be greatly reduced. Furthermore, since the stretching device is a cylinder having a variable size and one end fixed, it is possible to compensate and adjust the undulation of the cylindrical surface.

Next, the present invention will be described in detail with reference to an embodiment with reference to the drawings.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the device according to the invention when applied to a rotary screen.

The foil 1 is stretched on the screen stretching device 5. This foil leaf has a large number of holes, which are covered with a coating layer. The stretching device 5
It is a cylinder whose size in the circumferential direction is variable, and is fixed at one end. The spindle part which is a fixed part is denoted by reference numeral 10.
Indicated by The other end of the tensioning device 5 is supported by a vertical support 11 having a pneumatic position adjusting device. The spindle unit 10 has a drive mechanism for the stretching device 5 and cooperates with a pulse generator. The driving mechanism of the tensioning device is, for example, a gear type driving device, but may be a flat belt type driving device. In other words, the tensioning device 5 has a free end provided with a pneumatic position adjusting device and a fixed end including a drive mechanism for the tensioning device 5 and a spindle portion. It is configured so that the size in the circumferential direction can be changed.

A guide 6 is provided parallel to the axis of the stretching device 5, and a laser deflection mirror 8 disposed on a slider 7 can move along the guide. The deflection mirror 8 has
The laser beam 4 enters from the laser device 3 via the deflection device 9. At this time, the laser beam is deflected parallel to the axis of the stretching device. The deflection mirror 8 holds the laser beam 4
Is adjusted so as to enter the stretching device 5 vertically. Since the slider 7 is driven by the step motor, the moving distance per unit time always corresponds to a predetermined value. If the deflecting mirror 8 is attached to the slider 7 via a member whose position can be adjusted, the mirror 8 can be positioned more accurately.

The pattern to be drawn on the screen (plate frame) is stored in the memory device 2 or scanned by this device and converted into control pulses. The laser device 3 is controlled by the control pulse. At the same time, the drive mechanism is controlled accordingly. When the laser beam irradiates the screen, the material covering the hole at that portion is removed, and the hole is opened. In this way, a desired pattern is drawn on the screen in the form of dots.

As a driving mechanism of the stretching device 5, a non-commutator type DC motor whose rotation speed is controllable can be used.

[0014]

According to the present invention, when manufacturing a screen printing plate, the manufacturing cost can be greatly reduced without lowering the accuracy of the plate. Further, since the stretching device is, for example, a cylinder having a variable size and a fixed end, a device capable of compensating and adjusting the undulation of the cylindrical surface is provided.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment when applied to a rotary screen.

[Explanation of symbols]

1 foil leaf, 2 memory device, 3 laser device, 4
Laser beam, 5 stretching device, 6 guide, 7
Slider, 8 laser deflection beam, 9 deflection device,
10 Spindle section

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-51-96606 (JP, A) JP-A-60-107342 (JP, A) JP-A-55-62456 (JP, A) JP-A 57-96 77573 (JP, A) JP-A-52-72601 (JP, A) JP-A-51-64088 (JP, A)

Claims (2)

(57) [Scope of request for utility model registration] A hole provided by a stretching device (5) is provided.
Bei example a screen that is, the said holes provided laser
Filled with a substance that can be removed later by the beam (4)
Cage, electronic scanning for screen pattern - storage device (2)
The electronic scanning and storage device (2) is provided with a laser.
The laser is connected to a control unit of the beam (4).
Beam (4) passes through the hole at the location corresponding to the halftone
In a device for producing a screen printing plate, the screen is mounted on a stretching device (5) and is configured to remove the screen.
Etc. is a cylindrical foil leaf (1) provided with holes, etc., and is guided in parallel with a stretching device (5) for the foil leaf (1).
(6) is provided, pivotable laser deflection mirror onto the guide (6) (8) is placed on the movable longitudinally
The laser beam (4) is deflected by the deflection device (9).
Oriented parallel to the id (6), the laser beam (4)
Perpendicular to foil leaf (1) by means of said laser deflection mirror (8)
Illuminated, said electronic scanning and storage device (2) comprises a laser deflection mirror
Drive mechanism for (8) and / or including leaf (1)
An apparatus for producing a plate for screen printing , said apparatus being connected to a stretching device (5) . 2. The stretching device (5) is fixed at one end.
The device of claim 1, wherein the device is a cylinder of variable size.