JPH11342581A - Device for manufacture of simple printing plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for manufacturing a permeable printing plate which can be easily made up by using an extremely small quantity of materials and can print continuously, and also a device for manufacturing a simple printing plate which needs no development step in a makeup process and is operated easily. SOLUTION: This manufacturing device for a simple printing plate with a light source for emitting heat rays manufactures a simple printing plate by superposing a copy film 21 on a polyolefin foam sheet 22 with 50-150 deg.C melt point containing a continuous cell and emitting heat rays from above a film 21 to form an image part 22A on the polyolefin foam sheet 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a simple printing plate manufacturing apparatus,
More specifically, the present invention relates to a production apparatus for direct plate making that does not require a developing step and therefore does not require skill in plate making.

[0001]

2. Description of the Related Art As is well known, the recent progress of printing plate materials has been remarkable, and resin letterpresses, planographic plates, and intaglio plates using photosensitive resin have been replaced by conventional metal plate materials, and the mainstream of commercial printing. It has become. On the other hand, light printing represented by a copying machine tends to enter not only office work but also ordinary households, and this tendency is expected to increase further in the future.

In such a situation, a printing plate making system that can easily make a plate without any skill is required at the stage of making a printing plate, and a penetrating seal is becoming popular as a response to this. .

[0003] As a response to these demands,
A method has been proposed in which a perforated image is formed on a stencil sheet using a thermal printer, a wire dot printer, or the like, and the stencil sheet is mounted on a printing machine for printing. In order to make and print using this method, stencil printing paper is attached to the printer.In the case of a thermal printer, characters and the like are melt-perforated in a dot matrix on the film of the base paper by the heat of the thermal head, and the 2. Description of the Related Art In a printer, a method is used in which a stencil sheet is perforated with a wire pin to be impacted to produce a stencil sheet for printing.

In this case, it is necessary to use a special pen containing carbon in order to absorb heat more easily, the stencil printing plate having a thin transparent film and a screen is expensive, and printing ink is frequently used. Have some problems, such as needing to be added to

Further, after a positive film is placed on a photosensitive resin relief plate and irradiated with ultraviolet rays, an unexposed portion is washed out to form an intaglio plate on the substrate, and a foam having open cells is placed on the intaglio plate. 10
There has also been proposed a method of preparing a printing plate which is pressed by a press or a roll forming machine at 0 to 130 ° C., and a portion in contact with the heated convex portion is melted to form irregularities to form a printing plate.

Also in this case, a press or roll forming machine for heating and melting is required for the step of making a metal plate or a photosensitive resin plate or for forming irregularities on a foam. It is not easy for everyone to make a printing plate without worry, and the general public cannot make it easily and immediately, which is a great hindrance to its spread.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks of the conventional technology.
A second object of the present invention is to provide an apparatus for manufacturing a permeation printing plate that can be easily made using very few materials and that enables continuous printing. Another object of the present invention is to provide a simple printing plate manufacturing apparatus.

[0008]

SUMMARY OF THE INVENTION The object of the present invention is as follows.
This is achieved by any of the following simple printing plate manufacturing apparatuses. That is, a simple printing plate in which a mask film is superimposed on a polyolefin-based foam sheet having a melting point of 50 to 150 ° C. and having open cells and heat rays are irradiated from above the film to form an image area on the polyolefin-based foam sheet A simple printing plate manufacturing apparatus, comprising: a light source for irradiating heat rays; a support for holding the foam sheet; and a housing.
A simple printing plate manufacturing apparatus for directly irradiating a laser to a polyolefin foam sheet having open cells at 50 ° C. to form an image portion on the polyolefin foam sheet, and controls a laser light source and a laser scan. An apparatus for manufacturing a simplified printing plate, comprising: a control mechanism; a support for holding the foam sheet; and a housing. ".

That is, the present invention uses a polyolefin-based foam having a low melting point and open cells, and covers the mask film directly on the foam to selectively irradiate heat rays, or directly irradiates heat rays to generate heat rays. It is an object of the present invention to provide a manufacturing apparatus for creating a completely new type of penetrating mark by melting a portion which does not change without absorbing and absorbing a heat ray to form a collapsed sheet portion of bubbles.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The melting point used in the present invention is 50 to
As the polyolefin-based foam having a temperature of 150 ° C., any foam having ordinary open cells may be used, and any known foam can be used.

As the polyolefin-based thermoplastic resin,
Polyurethane, polyacetal, polyethylene, polypropylene, polystyrene, polyamide and the like are used.

[0012] As a method for producing open cells,
As disclosed in JP-39212, a method in which a mixture of calcium sulfite and calcium sulfate added to a polyolefin resin is formed into a sheet by an extrusion method, and the formed product is treated with an inorganic acid capable of dissolving calcium. And Japanese Patent Publication No. 57-42651,
Non-ionic surfactants or polyhydric alcohols, kneaded with a thermoplastic polyolefin resin which is insoluble in organic solvents and soluble in water or an aqueous acid solution, are molded, molded, washed with water to remove open cells. There is a way to get it. Also,
A foam obtained by breaking bubbles with a needle punch or the like into a foam having closed cells to make it continuous can be used. As the light source used in the present invention, any light source can be used as long as it generates a heat ray by irradiating a flash lamp, a strobo lamp, an ultraviolet ray, an infrared ray, an electron beam, a laser beam or the like. In the present invention, usually, a mask film for selectively blocking heat rays is adhered to a polyolefin-based foam having open cells, and a heat ray is irradiated from above to form an image area of a masked unexposed portion of the printing plate. By doing so, a printing plate for penetrating printing is produced.

In addition, a computer is connected to a laser beam or an electron beam, and characters input to the computer,
The pattern may be directly irradiated onto the foam sheet without using a mask film.

As a support for holding the foam sheet,
There is no particular limitation as long as the foam sheet can be supported at a position where the heat ray from the light source can be irradiated. Foam sheet,
It is preferable to support the foam sheet with a light-transmitting plate such as glass or an acrylic plate interposed between the mask film and the light source. With such a mechanism, not only the holding of the foam but also the close contact between the foam and the mask film can be achieved. It is also preferable to irradiate heat rays from below using a support such as glass or an acrylic plate.

The manufacturing apparatus according to the present invention has a light source,
This is an apparatus having a housing provided with a support for holding the foam sheet, and the housing is preferably a closed type. By using a closed type, heat rays and a laser from a light source do not leak to the outside.

As the material of the mask film used in the present invention, any material can be used as long as it normally transmits light. For example, plastic films and sheets obtained from polyethylene, polypropylene, polyester, polyvinyl chloride, polyvinylidene chloride, polyamide and the like, silver salt films, tracing paper and the like can be mentioned.

According to the apparatus for producing a simple printing plate of the present invention, the surface of the polyolefin foam sheet having open cells is selectively irradiated with heat rays. Because the surface of the body sheet is melted by heat (this portion forms a non-image portion), ink does not appear on the surface of the foam sheet at this portion,
On the other hand, in the portion not melted by heat, the ink appears on the sheet surface and an image portion can be formed.

[0018]

The present invention will be described in detail with reference to the following examples. Example 1 A positive film made of a 200 μm thick transparent polyester having characters and pictures was placed at a predetermined position on a polyethylene foam sheet having open cells (manufactured by Yamahachi Chemical Co., Ltd., thickness: 3 mm). Infrared rays were irradiated from above the positive film using an electron irradiation device (“Xenofax” manufactured by Riso Kagaku Kogyo KK). After irradiation, the exposed part of the foam sheet is melted by heat and the surface of the open cell sheet is sealed, and the unexposed part not exposed to light obtains a printing plate that retains the open cell without melting the surface. Was completed.

Inks were injected with a syringe into the letters and patterns of the foam sheet of the printing plate thus obtained, and the ink was made uniform over the entire sheet in this portion over 2 hours. This was affixed to a stamping stand and pressed against paper, and the characters and designs were transferred to paper cleanly. In addition, no background stain was observed in the non-printed portion.

Example 2 A plastic sheet having open cells ("Polabolelon", manufactured by Kikuchi Seisakusho KK) was used, and characters were written on the transparent film with an oil-based pen (penterpen). After that, the transparent film was irradiated with a flash lamp from above.

After the exposure, the exposed portion of the foam sheet is melted by light and heat to seal the sheet surface.
The unexposed portion on which the characters were drawn was leaning while retaining open cells. When ink was injected into the open cells of the sheet thus obtained in the same manner as in Example 1, a good printed matter was obtained.

Example 3 A foam sheet was superimposed on a negative film made by using a word processing system (manufactured by Mu-Tech Co., Ltd.) to create characters and pictures printed by a word processor, and a xenon flash lamp (manufactured by Ushio Inc.) Flash light was irradiated from above the negative film.

In the character and design portions, the sheet surface was melted to seal the open cells on the surface, and the unexposed portions retained the open cells. Inks were injected into the letters and patterns of the sheet thus obtained using a syringe and stored for about one day. When this plate material was printed in the same manner as in Example 1, a good printed matter was obtained.

Example 4 A manuscript made by a word processor was turned over to a negative film using a KPD (manufactured by Kimoto Corporation) film, and this film was overlaid on a sheet having open cells made of polypropylene, and a small film was placed on the negative film. Using a xenon flash lamp (manufactured by Ushio Inc.). After the exposure, the surface of the foam sheet was exposed, and the surface of the unexposed portion was kept open cells. Post-processing was performed in the same manner as in Example 3, and printing was performed. As a result, it was found that a good printed matter was obtained.

Example 5 A polyolefin foam having open cells (manufactured by Yamahachi Chemical Co., Ltd.) was used, and the characters and patterns whose layouts were edited using a personal computer were directly laser-scanned and irradiated on the sheet surface. . Even in such a case, the surface of the foam sheet irradiated with the laser was melted and the open cells were sealed. The obtained sheet was ink-injected under the conditions of Example 1, and after stable printing, a good printed matter was obtained.

[0026]

Since the manufacturing apparatus of the present invention is constructed as described above, it is possible to obtain a simple printing plate which uses very few materials in plate making and which does not require a developing step and which is simple in operation.

[Brief description of the drawings]

FIG. 1 is a schematic view of an example of a manufacturing apparatus that forms an image portion by irradiating heat rays through a mask film.

FIG. 2 is a schematic view of an example of a manufacturing apparatus that forms an image portion by irradiating heat rays through a mask film.

FIG. 3 is a schematic view of an example of a manufacturing apparatus for forming an image portion by directly irradiating a laser.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 light source lamp 2 laser light source 3 heat ray (transmitted light) 3A laser beam 4 heat ray (non-transmitted light) 5 control signal 11 translucent plate (glass, acrylic plate, etc.) 12 support base 13 housing 21 mask film 21A mask film ( 22) Foam sheet 22A Sealed part (exposed part) 22B Ink bleeding part (unexposed part)

Claims (2)

[Claims] 1. A simple method of superimposing a mask film on a polyolefin foam sheet having a melting point of 50 to 150 ° C. and having open cells, and irradiating heat rays from above the film to form an image area on the polyolefin foam sheet. An apparatus for manufacturing a printing plate, comprising: a light source for irradiating heat rays; a support for holding the foam sheet; and a housing. 2. A simple printing plate manufacturing apparatus for directly irradiating a laser to a polyolefin foam sheet having a melting point of 50 to 150 ° C. and having open cells to form an image area on the polyolefin foam sheet. An apparatus for manufacturing a simplified printing plate, comprising: a laser light source; a control mechanism for controlling laser scanning; and a support base and a housing for holding the foam sheet.