JPH10250205A - Manufacture of substrate for processing of stamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce in large amounts of substrate for processing wherein pores are uniformly formed on a broad smooth surface. SOLUTION: A plasticized synthetic resin material of urethane resin or the like and at least a foaming agent are mixed, which is extruded from a nozzle of a flat aperture to mold a thick original plate. The thick plate is divided into a plurality of substrates for process 105 by slicing in a thickness direction. Then, at least one sliced surface in a broad wide surface of the substrate for process 105 placed on a base plate 111 is heated and pressed with a heating plate 110 havihg a smooth surface 110a. Then, the broad wide surface of the substrate for process 105 is suitably melted and solidified thereafter so that an exposed area of the open cell of a large area exposed to the sliced surface is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a cell having an open cell,
The present invention relates to a method for manufacturing a stamp plate-making substrate made of a porous sheet that can be impregnated with stamp ink.

[0002]

2. Description of the Related Art Conventionally, various printing apparatuses such as stamps have been used to print desired images such as pictures and characters on a print medium such as a postcard. Of these, Japanese Patent Laid-Open No. 7-2
No. 85258 discloses an ink bleeding portion which becomes a mirror image of a desired imprint original, and an ink non-filling portion which closes the continuous bubbles, is provided on the surface of a plate for making a stamp made of a porous sheet having continuous bubbles and which can be impregnated with stamp ink. Multi-color printing using a printing plate with a printing surface consisting of a bleeding part, inhaling multiple colors of ink directly into the bleeding part of the printing plate, and pressing a printing medium such as a postcard on the printing plate surface. A method for manufacturing a stamp has been proposed.

In the above publication, as a first method for manufacturing (plate making) a printing plate having a printing surface formed of an ink bleeding portion which is a mirror image of a predetermined imprint document and a non-ink bleeding portion which closes open cells, is provided. A heat transfer sheet is placed on the surface of a porous sheet (substrate for making a stamp) having open cells that can be impregnated with stamp ink, and a document sheet having a desired imprint is placed thereon so as to be a mirror image. By irradiating infrared rays from above the original sheet in a state where the porous sheet is compressed, a transfer portion and a non-transfer portion of the heat transferable ink are formed on the surface of the porous sheet, and the transfer portion becomes an ink non-exuding portion, It is disclosed that the non-transferred portion has a stamped surface serving as an ink exuding portion.

[0004] In a second method, a heating plate made of at least one selected from the group consisting of carbon and a polymer substance is placed on the surface of a porous sheet having open cells and impregnated with stamp ink. Further, the original sheet having a desired imprint made of a liquid-absorbing opaque sheet is impregnated with a hardly volatile substance so that the imprint original image becomes a mirror image, and then irradiated with a flash containing infrared rays from the original sheet side. As a result, the heating plate corresponding to the portion other than the imprint original image generates heat and melts the surface of the porous sheet to form an ink non-exuding portion, while the surface of the porous sheet corresponding to the imprint original image does not melt and the ink does not melt. It is disclosed to have a stamped surface serving as an exudation part.

In these plate making methods, a manuscript sheet is placed on an acrylic transparent support plate on the light irradiation side, and then a heat transfer sheet or a heating plate is laid thereon, and a porous sheet is further placed thereon. The light is emitted from the transparent support plate side with a flash valve or the like, with the upper portion thereof being pressed by a pressing plate. By the way, as a method for producing the porous sheet (substrate for making a stamp), a soft synthetic resin material such as a urethane-based resin and at least a foaming agent are mixed, and a nozzle 100 having a flat opening area shown in FIG. Extrusion is performed to form a flat continuous plate-shaped original plate 101. This original plate 101 is sliced in an appropriate thickness direction to a predetermined thickness, and then cut into predetermined lengths and widths for use. Was.

When the material is extruded from the nozzle 100, the surface (skin surface) 101a of the original plate 101 extruded by the pressure from the inner diameter side of the wall thickness by the foaming agent is rubbed by the opening edge 100a of the nozzle 100. Since it is released into a liquid such as water, FIG.
As shown in (b), the pores 10 of the open cells 102 exposed on the wide surface (skin surface) 101a of the original plate 101
4 so that the opening area of the soft synthetic resin material 10 is small.
Part 3 is deformed. Such small-area pores 10
4 is substantially uniformly formed on the entire skin surface 101a of the original plate 101. When the skin surface 101a is used as a stamp surface, the stamp ink impregnated in the open cells 102 is pushed out by an appropriate amount, and the imprint is imprinted on the paper. However, since the ink does not exude like too much stamp ink, a beautiful and clear stamp can be obtained.

[0007]

However, FIG.
As in the case of cutting along the line cc in FIG.
Is sliced in the thickness direction, the open cell 1
Since the pore area of No. 02 is exposed as the pores 104 as it is, as shown in FIG. 2C, the pores 104 are large and vary. A large amount of the stamp ink is easily extruded, and the imprint is blurred, so that the stamp cannot be cleaned.

In order to solve this problem, the opening area of the nozzle 100 is formed to be extremely thin and flat so that the original plate 101 has the same thickness (thin plate) as the plate for making a stamp to be finally used. When the material is extruded from the nozzle 100, the resistance received by the nozzle 100 from the material is large, the material cannot be quickly extruded, the extruding operation takes a very long time, and the production efficiency of the plate making substrate is poor. was there.

The present invention has been made to solve these problems of the prior art, and is intended for plate making of a stamp which can reliably perform good plate making even on a porous sheet having a large area. It is an object of the present invention to provide a method for manufacturing a substrate.

[0010]

According to a first aspect of the present invention, there is provided a method of manufacturing a plate for plate making of a stamp according to the present invention. , A soft synthetic resin material such as urethane resin and at least a foaming agent are mixed and extruded from a nozzle having a flat opening to form a thick original plate, and the original plate is sliced in the thickness direction and divided into a plurality of plate-making substrates. And then
At least one of the wide surfaces of the plate making substrate is heated and pressed by a heating plate having a smooth surface.

According to a second aspect of the present invention, there is provided a method for manufacturing a stamp plate making substrate having a porous stamp having open cells, wherein the soft synthetic resin material such as a urethane resin is used. At least a foaming agent is mixed and extruded from a nozzle having a flat opening to form a thick original plate, the original plate is sliced in the thickness direction and divided into a plurality of plate-making substrates, and then, the slice is placed on a transparent support plate. Light energy is emitted from the transparent support plate side in a state where a pressing force is applied to the plate making substrate placed in contact with the surface in the direction of the transparent support plate.

According to a third aspect of the present invention, in the method of manufacturing a plate for making a stamp according to the second aspect,
The irradiation of the light energy is for turning on a light source disposed below the transparent support plate while moving the light source body substantially parallel to the transparent support plate.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described. As shown in FIG. 1, as in the conventional case, a soft synthetic resin material such as urethane resin and at least a foaming agent are mixed and extruded from a flat opening nozzle 100 to form a continuous strip-shaped and thick original plate 101. I do. The basic material is a polyolefin-based resin, a polyvinyl chloride-based resin, a polyurethane-based resin, or the like, which may contain carbon black or a light energy-absorbing substance dispersed therein, or may not contain these. In the embodiment, the original plate 101 has a thickness (1 mm to 1 mm) of the final stamp plate making substrate 105 as shown in FIG.
5 mm) so that it can be sliced into about 3 to 10 pieces. The width of the original plate 101 is set to about 1 m, and a large number of the plate making substrates 105 can be obtained.

Next, as shown in FIG.
1 is sliced in the thickness direction so that a plurality (four in the illustrated embodiment, for simplicity) of the plate-making substrate 105 can be obtained. This slicing method is performed mechanically using a cutter. The plate-making substrate 105 sliced in this manner has a wide surface on one side of the nozzle 10 as described above.
A skin surface 101a rubbed at the opening edge 100a of 0 and the other surface is the slice surface 101b as it is, or a wide surface having the slice surface 101b is formed (see FIG. 3B). .

Next, the plate-making substrate 105 is pressed and heated on the support plate 111 such that the wide slice surface 101b faces the smooth surface 110a of the heating plate 110 made of metal or the like (see FIG. 1). (See FIG. 4). At this time, for example,
When the soft synthetic resin material is a urethane resin, its melting point is 120 ° C.
About 19 ° C., the pressure of the smooth surface 110 a and the heating energy reduce the area of the pores 104 exposed on the slice surface 101 b of the plate-making substrate 105,
Surface 105a similar to (similar to) skin surface 101a
(See FIG. 5A). After the heating and pressing, the heating plate 110 is removed and the surface of the plate making substrate 105 is solidified by cooling or the like.

When the wide surfaces of the plate making substrate 105 are the slice surfaces 101b, the two surfaces of the plate making substrate 105 are heated by sandwiching them between two heating plates 110. Both may be formed on the surface 105a that is similar (similar) to the skin surface 101a (see FIG. 5B). FIG. 6 shows a second example of the manufacturing method of the present invention.
In the embodiment, for example, PET (polyethylene terephthalate: melting point of about 23) having a melting point higher than the melting point of the soft synthetic resin material on the upper surface of a transparent support plate 112 such as a glass plate.
(0 ° C.), a plate-making substrate 105 containing no carbon black or a light-energy-absorbing substance is placed on the plate 105 so that the slice surface 101b faces the plate 105, and pressed from above the plate-making substrate 105. Board 114
To apply a strong light energy from below the transparent support plate 112 by lighting a halogen lamp or the like. In addition, it is preferable to use a material in which a black pigment such as carbon black is previously mixed or printed on the surface of the heating sheet 113.

By such light irradiation, light energy is absorbed by the heating sheet 113 and the heating sheet 113
Is heated, the heat slightly melts the surface of the slice surface 101b of the plate-making substrate 105, and the pores 1 exposed on the surface are melted.
04 is reduced, and the slice surface 101b of the plate-making substrate 105 is replaced with a clean skin surface 10 like the above-described embodiment.
1a can be formed on a surface 105a that is similar (similar) to 1a.

In this case, although not shown, when a halogen lamp or the like is turned on while continuously moving along the lower surface of the transparent support plate 112, the slice surface 10 of the plate making substrate 105 is turned on.
Even if 1b has a large surface area, a surface 105a similar to (similar to) skin surface 101a can be formed uniformly. In the case of the plate-making substrate 105 containing carbon black or a light energy-sucking substance dispersed therein, the heating sheet 113 can be omitted, that is, the plate-making substrate 105 can be irradiated with light energy.
As a result, the carbon material or the light energy-absorbing substance near the surface is heated, so that the resin material near the surface of the plate making substrate 105 is melted, and the area of the exposed pores 104 can be reduced.

In the examples, the weight ratio of the carbon black or the light energy-absorbing substance contained is such that the content ratio of the carbon black to the polyurethane foamed resin is 1.
0% to 1.5% by weight. The content of carbon black is not limited to the above, but may be 0.1% by weight.
It may be in the range of ~ 15% by weight. If the content of carbon black is more than 15% by weight, the surface of the plate-making substrate 105 itself becomes black, and it is difficult to determine whether the applied stamp ink is any color or not. If it is less than 0.1% by weight, sufficient heat generation cannot be obtained, and the surface of the plate-making substrate 105 cannot be melted. In addition, examples of the light energy attracting substance include silver chloride and silver bromide.

Next, the plate making method will be described. A plate making substrate 105 in which carbon black or a light energy absorbing material is dispersed and contained in a porous material having open cells and impregnable with stamp ink. Is used, when making a plate, a light sheet of any color such as black, white, gold, silver or the like is previously placed on the surface of a light-transmissive sheet such as PPC sheet (document paper for tracing) as the original sheet 116. A light-impermeable image portion 119 is drawn using a transparent ink, an oil-based marker, paint, paint, or the like.

On the other hand, a transparent sheet 117 to be interposed between the original sheet 116 and the wide lower surface 105a of the plate making substrate 105 is prepared. The transparent sheet 27 has a melting point of the plate-making substrate 105 (about 120 ° C. for a soft polyurethane resin, about 70 ° C. for a soft polyolefin resin).
Has the property of melting at higher temperatures. An example is transparent P having a high melting point (about 230 ° C.).
An ET (polyethylene terephthalate) resin film is preferable, and the thickness of each sheet is about 0.025 mm to 0.2 mm.

Next, the original sheet 1 is placed on the transparent support plate 118.
16 is placed with the image portion 119 facing up,
Next, a transparent sheet 117 is overlaid, and the plate-making substrate 105 is further overlaid thereon so that the pore exposed side faces downward (see FIG. 7B).
Light is radiated from the lower surface side of 8 by a flash operation of a flash lamp or a xenon lamp or a continuous lighting operation of a halogen lamp.

When the light irradiation is performed in this manner, light energy that has passed through a portion (non-image portion) other than the image portion 119 on the original sheet 116 passes through the transparent sheet 117 as it is (see FIG. 7C), Due to the light energy, carbon black near the surface (light irradiation side surface) corresponding to a portion (non-image portion) other than the image portion 119 on the plate making substrate 105 absorbs heat, and the image line on the plate making substrate 105 is absorbed. The surface portion corresponding to the portion (non-image portion) other than the portion 26a is heated and melted, and then solidified when solidified.
Is closed, and an ink non-exuding portion 120 having a predetermined thickness is formed (see FIGS. 7D and 8).

On the other hand, the original sheet 116 is
In the case where 19 is black containing carbon, the image portion 119 is formed by light energy irradiated from the direction of the transparent support plate 118.
Is heated and the temperature rises, but in the transparent sheet 117 corresponding to the image area 119, heat is conducted in the lateral direction or the like within the thickness of the sheet. In other words, the heat generated on the original sheet 116 side is absorbed and dispersed by the transparent sheet 117, and the surface of the plate making substrate 105 corresponding to the image area 119 is not heated, and the shape of the image area 119 is not heated. Pore 104
Becomes the ink bleeding portion 121 with the portion exposed. When the image portion 119 is other than black, light energy is blocked and reflected by the image portion 119, and the surface of the plate making substrate 105 corresponding to the image portion 119 is not heated.
The pores 104 become the exposed ink seeping portions 121.

Therefore, when the transparent sheet 117 and the original sheet 116 are removed from the wide surface 105a of the plate making substrate 105 after the light irradiation, as shown in FIGS. 7D and 8, the image on the original sheet 116 is removed. The ink bleeding part 121 remains with the pores 104 in the shape of the mirror image of the line part 119 exposed, and the ink non-bleeding part 1 corresponding to the non-image part
The plate 20 can be made as a stamp S having a predetermined stamped surface formed on the wide surface 105a of the plate making substrate 105.

Preferably, the transparent sheet 117 is subjected to sand blasting or fine embossing or embossing on the surface in contact with the wide surface of the plate-making substrate 105, so that the transparent sheet 117 and the plate-making substrate 105 have a wide surface. When the image portion 119 of the original sheet 116 is made of black ink, the heat generated in the image portion 119 is efficiently absorbed and dispersed by the transparent sheet 117. Since the light is not transmitted in the direction of the surface of the plate making substrate 105, the pores in the shape of the mirror image of the image portion 119 are left exposed, and the effect of the edge of the imprint of the ink bleeding portion 121 becomes clear.

A plate-making substrate 10 in which a light energy absorbing material such as carbon black is dispersed in a porous material having open cells and impregnable with stamp ink.
The above-described light irradiation may be executed from the original sheet 116 side by directly adhering the image portion 116 of the original sheet 116 to the surface of the document sheet 5. In this case, the surface of the plate-making substrate 105 facing the image portion 119 is also heated and melted, and then solidified when the ink is exfoliated. When peeling, the overhead wire part 1
The ink non-exuding portion is peeled off according to the shape of No. 19, so that the ink exuding portion 121 can be formed as per the seal imprint.

In another embodiment, the plate-making substrate 105 is made of a porous sheet that does not contain carbon black or a light energy-absorbing substance, has open cells, and can be impregnated with stamp ink. The material is the same as described above. In this case, the plate-making substrate 10
As the heating sheet that comes into contact with the wide surface (the surface where the pores are exposed) of No. 5, a black pigment such as carbon black is previously mixed or printed on the surface. In this embodiment, in the main heating operation, light irradiated from the transparent support plate 118 side passes through the document sheet 116, and in a portion corresponding to a non-image portion, the light is heated by light energy absorbed by the black heating sheet. Since the surface of the facing plate-making substrate 105 is once melted and solidified by the heat, the stamping ink becomes an ink non-exuding portion 120 from which the ink does not exude, and the light corresponding to the image portion 119 is not transmitted.
The ink bleeding portion 121 is formed with the pores 104 in the original sheet 116 having the shape of the mirror image of the image portion 119 exposed, and the plate can be made as a stamp S having a predetermined stamp surface.

[0029]

According to the first aspect of the present invention, there is provided a method of manufacturing a stamp plate making substrate for a porous stamp having open cells, wherein the soft synthetic resin material such as a urethane resin is used. At least a foaming agent is mixed and extruded from a flat opening nozzle to form a thick original plate, the original plate is sliced in the thickness direction and divided into a plurality of plate-making substrates, and then the wide surface of the plate-making substrate Is heated and pressed by a heating plate having a smooth surface.

Since such a thick original plate is sliced into a thin one, the growth of internal open cells tends to be more uniform than in the case where a very thin one is extruded from a nozzle from the beginning. In addition, it is easy to mass-produce plate-shaped substrates having a wide flat surface. Then, if the sliced surface of the original plate is heated and pressed by a heating plate having a smooth surface, the surface is slightly (moderately) melted and pores having a large area exposed on the sliced surface are reduced. After pressing, the heating plate is removed and the surface of the plate-making substrate is solidified by cooling or the like, and the surface is smooth, the area of the exposed pores is small, and the plate has a smooth, flat plate with a small thickness and a uniform thickness. There is an effect that a substrate for use can be produced.

Therefore, there is an effect that the quality of the stamping surface of the stamp and the later plate making is improved. The method of manufacturing a plate for making a stamp plate of the invention according to claim 2 is a method of manufacturing a plate for making a porous stamp having open cells, wherein the soft synthetic resin material such as a urethane resin and at least a foaming agent are used. And extruded from a nozzle with a flat opening to form a thick original plate, slice the original plate in the thickness direction and divide it into a plurality of plate-making substrates, and then apply the sliced surface on a transparent support plate. Light energy is emitted from the transparent support plate side in a state where a pressing force is applied to the plate making substrate placed in contact with the plate support in the direction of the transparent support plate.

In place of the heating plate according to the first aspect, even if light energy is applied, the surface of the plate-making substrate is appropriately melted, and the large-area pores exposed on the slice surface are reduced and smooth. The same effect is obtained in that a plate-making substrate having a small thickness with a flat surface having a uniform flat surface having a small exposed pore area can be obtained. The other effects of the above can be achieved in any manner.

According to a third aspect of the present invention, in the method of manufacturing a plate for making a stamp according to the second aspect,
The irradiation of the light energy is for turning on the light source disposed below the transparent support plate while moving the light source substantially in parallel with the transparent support plate. There is also an effect that manufacturing becomes possible.

[Brief description of the drawings]

FIG. 1 is a perspective view of an original plate manufacturing method.

2A is an enlarged side sectional view of a main part of an original plate, and FIG.
FIG. 3 is a sectional view taken along line 線 b, and FIG. 3C is a sectional view taken along line ─c.

3A is a cross-sectional view showing a position where an original plate is sliced, and FIG. 3B is a cross-sectional view of a sliced plate-making substrate.

FIG. 4 is a cross-sectional view showing a state where a plate for making a plate is heated and pressed by a heating plate.

5A is a cross-sectional view of the plate-making substrate after heating and pressing only one wide surface, and FIG. 5B is a cross-sectional view of the plate-making substrate after heating and pressing both wide surfaces.

FIG. 6 is an explanatory view of a method of heating by irradiating light while pressing a plate-making substrate.

7A is a perspective view of a plate-making substrate, FIG. 7B is a cross-sectional view of a state in which an original sheet, a transparent sheet, and a plate-making substrate are arranged in an overlapping manner, and FIG. 7C is a cross-sectional view showing a light irradiation state; (D) is a cross-sectional view of a state where the plate-making substrate is separated from the transparent sheet.

FIG. 8 is a perspective view of the stamp in a plate-making finished state.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Nozzle 100a Opening edge 101 Original plate 101a Skin surface 102 Open cell 103 Soft synthetic resin material 104 Pores 105 Plate making plate 110 Heating plate 110a Smooth surface 111 Support plate

Claims (3)

[Claims] In a method for producing a plate for making a porous stamp having open cells, a soft original resin such as a urethane resin and at least a foaming agent are mixed and extruded from a nozzle having a flat opening to form a thick original plate. Forming, slicing the original plate in the thickness direction and dividing it into a plurality of plate-making substrates, and then heating at least one of the wide surfaces of the plate-making substrates with a heating plate having a smooth surface. A method for producing a stamp plate making substrate, characterized by pressing. 2. A method for manufacturing a plate for making a porous stamp having open cells, comprising: mixing a soft synthetic resin material such as a urethane resin and at least a foaming agent; and extruding the mixture from a nozzle having a flat opening to form a thick original plate. The original plate is sliced in the thickness direction to divide it into a plurality of plate-making substrates, and then pressed in the direction of the transparent support plate onto the plate-making substrate placed on the transparent support plate with the sliced surface abutting. A method for manufacturing a plate for plate making of a stamp, wherein light energy is irradiated from the transparent support plate side in a state where pressure is applied. 3. The method according to claim 2, wherein the irradiation of the light energy is performed while the light source disposed below the transparent support plate is moved substantially in parallel with the transparent support plate. A method for manufacturing a stamp plate substrate.