JP3533742B2 - Simple printing plate manufacturing method and apparatus - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a simple printing plate such as a stamp, a seal stamp, and a penetration mark using a foam sheet having open cells. A foam sheet having open cells was heated and pressure-bonded to an embossing material using the obtained intaglio plate or an intaglio plate made of a photosensitive resin plate as a female mold, and a desired image portion was transferred to the foam sheet. The present invention relates to a method for producing a simple printing plate capable of continuous printing by injecting ink into the convex portion of the sheet that is not heated and melted.

[0002]

2. Description of the Related Art As is well known, the recent progress of printing plate materials is remarkable, and resin letterpress plates, planographic plates and intaglio plates using a photosensitive resin have been replaced by old metal plate materials and become the mainstream of commercial printing. ing. On the other hand, a simple printing plate system represented by a copying machine, a print gocco, and an orchid pattern has a momentum to expand not only to office work but also to general households, and it is expected that this tendency will increase more and more in the future.

Under such circumstances, there is a demand for a system which can easily manufacture a printing plate without requiring skill at the stage of making a printing plate, and the penetration mark has become widespread as one of the measures to meet the demand.

The penetration mark is a printing plate having an image portion on the surface of a porous substance. By keeping the ink in the porous substance, the ink is continuously replenished without being replenished with each printing. It has a printable property. Penetration marks are mainly used for seals and stamps. As the porous substance, thermoplastic resin, rubber or the like is usually used.

As a method for producing such a penetration mark, Japanese Patent Application Laid-Open No. 53-136080 discloses that a thermoplastic resin powder having fine open cells is filled in a female mold having a concave portion and is further heated and pressed. A method of obtaining a penetration mark is disclosed. Japanese Patent Publication No. 62-16188 discloses a portion in which a masking material having an image is adhered to a permeation marking material such as rubber or a soft synthetic resin, and the masking material is not adhered by irradiating a laser beam. There is disclosed a method of obtaining a penetration mark by disappearing the surface layer of.

[0006] In addition, in JP-A-55-90361, a paste material composed of a water-soluble salt powder and a synthetic resin powder is applied to the surface of a substrate to prepare a penetration mark material,
The penetration mark material and a mold having a relief are heated and pressed to form a relief image on the penetration mark material, and the water-soluble salt powder is removed by washing to obtain a porous penetration mark. A method of manufacturing is disclosed.

Further, Japanese Patent Publication No. 58-35463 discloses a method in which a porous powder is put in a mold having a relief and heated and pressed to obtain a penetration mark.

Further, in Japanese Patent Publication No. 3-254982, a penetrating material having cylindrical open cells attached to a shaft member is rolled on a flat embossing member having a relief to form a cylinder. A method of manufacturing a penetrating indicia is disclosed.

As described above, the conventional permeation mark is manufactured by placing a porous powder substance made of rubber or a thermoplastic resin in a mold having a relief and heating and pressurizing it, or by forming a porous foam. It is produced by heat-sealing a sheet having an image on the body, or is formed by heat-sealing a porous foam on the surface of the sheet on which the print is formed.

In such a manufacturing method, there is no choice but to perform batch-type molding using a press molding machine, and it is not possible to continuously make a printing plate. It is also necessary to take into consideration the high cost of making metal molds. In such a situation, it can be produced only by a specific printer or a seal stamp maker as in the past, and the convenience and flexibility of the penetration mark cannot be widely and effectively developed.

[0011]

As described above, the above-mentioned manufacturing method has the following problems. (1) A press molding machine is usually used in the above method, but the manufacturing method using this apparatus is inevitably a batch type manufacturing process and is not suitable for mass production. Moreover, it is not possible to continuously make printing plates. Further, when a metal mold is used, there is a problem that the manufacturing cost of the mold is high. (2) In the method of manufacturing in which both the conventionally-known embossing member and the embossed member made of the permeation marking material are brought into full contact with each other and the entire surface is subjected to pressure, the entire contact portion can be accurately manufactured. There is a problem that it is difficult to apply a uniform pressure, and a difference in dimensional change between the reliefs on the embossed member and the embossed member tends to occur locally. (3) In the method of Japanese Patent Publication No. 3-254982, it is necessary to attach the permeation marking material to the shaft member, which is unsuitable for mass production, and the rotation force causes the embossing member and the embossed member to move. Since they are transmitted through the interposition, there is a problem that the relief of the obtained printing plate is displaced or the dimension changes from a desired dimension.

[0012]

In order to solve the above problems, the present invention has the following constitution. (1) The molding embossing member on which the relief image is formed and the embossing member that is a sheet having open cells are pressed while the molding embossing member is heated, and the relief is transferred to the embossing member. In the method for producing a simple printing plate having open cells, the embossing member and the embossing member installed in surface contact with the embossing plate are provided with an arc-shaped embossing cylinder and an embossing member. A method for producing a simple printing plate by bringing the plate into contact with the plate, rotating the arc-shaped embossing cylinder, and moving the embossing member and the plate to be embossed to perform a pressure press. (2) In the above method (1), the member to be embossed is moved by means that is synchronized with the rotation of the arcuate embossing cylinder. (3) In the method according to any one of (1) and (2) above, the pressing is performed by a circular pressure method with the embossing member attached to the arc-shaped embossing cylinder. (4) In the method according to any one of (1) to (3) above, the sheet having open cells is a foam. ( 5 ) In the above methods (1) to ( 4 ), the molding embossing member having a relief image formed thereon has a relief formed from a photosensitive resin composition. ( 6 ) In the method of (1) to ( 5 ) above, a weight is attached to the embossing cylinder. ( 7 ) An apparatus used in the method for producing a simple printing plate described in (1) to ( 6 ) above, wherein an arc-shaped embossing cylinder having a heating means and an embossed plate are moved. An apparatus for manufacturing a simple printing plate, comprising: a means and a means for synchronously moving an embossing cylinder and an embossed plate.

FIG. 1 illustrates a method for manufacturing a simple printing plate according to the present invention. An embossing member having a relief image formed on its surface and an embossed member which is a sheet having open cells are prepared. The embossing member 6 is provided in surface contact with the embossing plate 7. Further, while rotating the arc-shaped embossing cylinder 2, the embossing member 2 is provided between the embossing cylinder 2 and the embossing plate 7. 5 and pressure are applied to the pressed member 6 to transfer the relief pattern (not shown) on the surface of the pressed member 5 onto the pressed member 6. At that time, the embossing member 5 is heated, and the embossed member 6 in contact with the convex portion of the embossing member 5 is melted by heat, the open cells are destroyed and the surface is sealed. And the ink does not penetrate. On the other hand, at the concave portion of the embossing member 5, since the member to be embossed does not contact, it does not melt and maintains the property that the ink permeates through the open cells.

In the manufacture of the present invention, if at least one of the embossing cylinder 2 and the non-embossing plate 7 is given a kinetic force,
It is possible to rotate the embossing cylinder 2 and move the non-embossing plate 7 to transfer a pattern, but preferably, the rotation of the embossing cylinder 2 and the movement of the non-embossing plate 7 are performed by the embossing member and the cover. Means other than the force via the contact portion with the embossing member are used together to rotate and move in synchronization. According to this, there is an effect that the positional deviation of the obtained pattern on the pressed member is reduced.

Further, the embossing member does not necessarily have to be fixed to the arc-shaped embossing cylinder 2, but it is preferable to attach the embossing member 5 to the embossing cylinder 2 as shown in FIG. As will be described later, heat can be applied from the heated embossing cylinder 2 to the embossing member 5 in advance, the ink sealing property of the surface of the resulting embossed member becomes good, and a finer image can be reproduced. Is possible. Further, the pattern-transferred member to be pressed and the plate to be pressed can be independently discharged from the apparatus, and by continuously applying a new member to be pressed to the apparatus, the printing plate can be continuously printed. It is also characterized in that it can be manufactured.

The die pressing cylinder 2 may be of any shape as long as it has an arcuate cross section, and may have a circular cross section as shown in FIG. 2 or a fan shape.

The member to be embossed may be any as long as it has open cells, but is preferably a foam.

The pressing pressure is a linear pressure of 0.05 to 5
A range of 0 kgf / cm ² (4.9 to 4900 kPa) is preferably used. Molding pressure is 0.05kg f / cm
^If it is less than ² (4.9 kPa), the amount of pressing of the embossing member into the embossed member will be insufficient, and the contact surface between the embossing member and the embossed member will not be able to be heated uniformly, and must be melted by the heat originally. There is a risk that a meltable portion and a non-meltable portion will be generated on the surface of the embossed member, which is not necessary, and will not serve as a penetration mark. Also, the molding pressure is 50 kg f /
On the contrary, when the pressure exceeds cm ² (4900 kPa), the amount of pushing into the member to be pressed becomes too large and the bottom of the intaglio and the surface of the member to be pressed come into contact with each other, where the continuous bubbles on the surface of the member to be originally pressed should remain. This is because even the ink may be melted and the printed portion as the penetration mark may be lacking, so that a good penetration mark may not be obtained. Further, in order to achieve the pressure, it is preferable that the weight 3 is attached to the embossing cylinder.

Further, as the embossing member, a metal member which has been conventionally used requires a difficult step such as etching to provide a relief, and therefore the photosensitive resin composition is pattern-exposed and developed to form a relief pattern. Those formed with are preferably used.

Further, in the present invention, it is necessary that the molding embossing member is heated when the pattern is transferred to the embossing member. For that purpose, the embossing cylinder is also heated, It is preferable to heat the embossing member by heat transfer.
The surface temperature of the molding embossing member is preferably 80 to 150 ° C. When the surface temperature is 80 ° C. or lower, the meltability of the sheet having open cells during heating is lowered and the relief image of the intaglio plate cannot be faithfully transferred to the sheet. When the surface temperature exceeds 150 ° C., the member to be pressed is excessively melted, the relief is crushed, and the resulting printing plate is wavy.

As described above, the simple press plate having the pattern transferred to the embossed member is manufactured by the circular pressure press. The obtained simple printing plate is impregnated with ink inside, and the surface on which the pattern is formed is brought into contact with the printing object,
Print on the substrate. The part where the surface is in contact with the convex part of the embossing member and melts and loses the ink permeability becomes the non-image area without ink permeation, while the other part becomes the image area.

Next, a manufacturing apparatus used in the manufacturing method of the present invention will be described.

FIG. 2 shows an example of the manufacturing apparatus used in the present invention. The manufacturing apparatus 1 includes an arc-shaped die-pressing cylinder 2 and a guide roller 8 which is a means for moving the die-pressed plate. The die-pressing cylinder 2 and the guide roller 8 are means for synchronizing their rotations. Are connected by a synchronous gear 9. The embossing cylinder 2 is equipped with a heating means such as an electric heater (not shown). Although not necessarily required, a weight 3 is provided on the rotary shaft of the embossing cylinder 2 in order to keep the pressing pressure within the above-mentioned preferable range. Further, the motor 10 is provided as a means for giving motion, though it is not always necessary.

In the manufacturing apparatus of the present invention, at the start of the actual manufacturing process, the leading portions of the embossing member, the embossed member, and the embossing plate are located between the embossing cylinder 2 and the guide roller 8. When intervening, a vertical force is exerted on the embossing plate that separates the embossing cylinder 2 from the guide roller, and a force that moves the embossing cylinder 2 in the tangential direction of its arc is generated. Since the former force affects the pressing pressure, it is preferable to release the generated force. On the other hand, the latter force exerts a shear deformation on the embossing member and the embossed member, and eventually causes the pattern of the embossed member to be displaced. Therefore, it is preferable that the displacement does not occur. Further, it is necessary to change the thickness of the embossed member to be used depending on the required thickness of the simple printing plate. In order to meet these requirements, in the positional relationship between the embossing cylinder and the embossing plate (or guide roller), free movement is permitted in the direction perpendicular to the embossing plate, and It is preferable that the apparatus of the present invention is provided with means for following the change in the distance between the plates and for restraining the movement in the direction parallel to the embossed plate. The manufacturing apparatus shown in FIG. 2 is provided with the guide rails 4, and allows the vertical movement of the embossing cylinder 2 to be free and restrains the horizontal movement.

[0025]

EXAMPLES The present invention will be described in more detail with reference to the following examples. The manufacturing apparatus having the shape shown in FIG. 1 was used for manufacturing the simple printing plate.

Example 1 "Fuji Treasure" WS-83EP (relief depth, with a plate size of 100 x 150 mm (upside down 150 mm))
0.55 mm) was subjected to pattern exposure and development to obtain an embossing member having a pattern. As shown in FIG. 1, the embossing member 5 (relief pattern not shown) was attached to the embossing cylinder 2 (diameter 250 mm) of the simple printing plate manufacturing apparatus 1. At that time, the internal heater of the die-pressing cylinder 2 is operated so that the temperature of the surface of the die-molding body 2 is 120 ° C. and the surface of the die-pressing member 5 is 105 ±.
It was set to 2 ° C. On the other hand, a polyolefin-based open-cell foam sheet (MP sheet made by Yamahachi Chemical Co., Ltd.) having a sheet size of 110 × 160 mm and a thickness of 3 mm is used as the embossed member 6,
It was attached to the die-pressing plate 7, and the guide roller 8 was attached so that the end of the die-pressing plate 7 was in contact with the die-pressing cylinder 2.

Next, the embossing cylinder 2 and the guide roller 8 were rotated in synchronism, and the embossing member and the embossing member were pressure-pressed and molded between the embossing cylinder and the embossing plate. Nip width of both members at the time of molding is 12.3 mm, molding pressure is 1.23 kg
It was f / cm ² . The pressed member is discharged according to the rotation. The amount of pushing of the obtained member to be embossed by contact with the convex portion of the member (the thickness of the concave portion)
Was 0.18 mm.

The pattern of the embossing member is transferred onto the molded member to be embossed without any problem, and the simple printing plate in which the open cells remain in the recessed portion of the embossing member. Got

The foam sheet of the printing plate thus obtained
Inject the ink with a syringe into the letters and patterns of the
The ink was made uniform over the entire sheet for 2 hours. When the printing plate was attached to the stamp board and pressed against the paper, the letters and patterns were transferred onto the paper beautifully. In addition, no stain was found on the non-printed part.

Example 2 Under the same conditions as in Example 1, the thickness of the polyolefin open-cell foam sheet (MP sheet made by Yamaha Chemical Co., Ltd.) was changed to 4 mm and 5 mm. The embossing cylinder and the embossed plate were driven while being synchronized with the pressing plate to perform rotary pressing. Nip width of both members at the time of molding is 12.3 mm
Met.

The sheet was discharged while being pressed between the die-pressing cylinder and the die-pressing plate, and the pushing amount of the obtained die-pressing member was 0.18 mm and 0.18 mm, respectively. On the molded MP sheet, the pattern of the plate was transferred without any problems, and the open cells remained in the portions corresponding to the recesses of the embossing member. The nip width of the pressed plate at this time was 12.3 mm.

Considering together with Example 1, even if the sheet thickness of the pressed member 6 is changed from 3 mm to 4 mm or 5 mm, this change amount connects the plate cylinder of the press and the pressed plate. It was found that the stroke of the guide rail was absorbed, and it was possible to cope with the amount of change in the thickness of the sheet without changing the press pressure.

When the sheet thus obtained was used as a printing plate and ink was injected into the open cell portions in the same manner as in Example 1 to print, a good printed matter could be obtained.

[0034]

According to the method of the present invention, the image is fine,
An ink-penetrating simple printing plate having a good pattern with no image shift can be obtained. Even when printing plates having different film thicknesses are required, a simple printing plate having stable and good image reproducibility can be obtained.

Further, if the embossing member is attached to the embossing cylinder, the simple press plate can be continuously manufactured by successively inserting the embossed member.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a manufacturing process of a simple printing plate of the invention.

FIG. 2 is a manufacturing apparatus of the present invention. (1) is a front view, (2) is a right side view

[Explanation of symbols]

1: Manufacturing equipment 2: Embossing cylinder 3: Weight 4: Guide rail 5: Embossing member 6: Stamped member 7: Stamped plate 8: Guide roller 9: Synchronous gear 10: Motor

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Claims (7)

(57) [Claims] 1. A molding embossing member on which a relief image is formed and an embossing member that is a sheet having open cells are pressed while the molding embossing member is heated, so that the relief is pressed. In the method for producing a simple printing plate having open cells by transferring to an arc-shaped embossing cylinder and A method for producing a simple printing plate, which comprises contacting with an embossing plate, moving an embossing member and an embossed plate while rotating an arcuate embossing cylinder, and performing a pressure press. 2. The method for producing a simple printing plate according to claim 1, wherein the member to be embossed is moved by means which synchronizes with the rotation of the arc-shaped embossing cylinder. 3. The method for producing a simple printing plate according to claim 1, wherein the pressing is carried out in a state where the embossing member is attached to the arc-shaped embossing cylinder. 4. A method for producing a simple printing plate according to claim 1, method for producing a simple printing plate having open cells, characterized in that sheet having open cells is a foam. 5. The method for producing a simple printing plate according to claim 1, wherein the molding embossing member has a relief formed from a photosensitive resin composition. . 6. The method of manufacturing a simple printing plate according to claim 1, wherein a weight is attached to the embossing cylinder. 7. An apparatus used in the method for manufacturing a simple printing plate according to claim 1, wherein the arc-shaped embossing cylinder has a heating means, a means for moving the embossed plate, and an embossing cylinder. An apparatus for producing a simple printing plate, comprising: means for synchronously moving a press plate.