JP3724104B2 - Manufacturing method of stamp plate-making substrate - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a plate-making substrate for a stamp made of a porous sheet having open cells and capable of being impregnated with stamp ink.
[0002]
[Prior art]
Conventionally, various printing apparatuses such as stamps have been used to print a desired image such as a picture or a character on a printing medium such as a postcard. Among these, in JP-A-7-285258, an ink bleed portion which becomes a mirror image of a desired imprint original on the surface of a plate-making substrate made of a porous sheet which has open cells and can be impregnated with stamp ink, Using a printing plate that has a printing surface consisting of non-bleeded ink that blocks open bubbles, and inhales multiple colors of ink directly into the ink-bleeded portion of the printing plate. A multicolor stamp manufacturing method in which printing is performed by pressing is proposed.
[0003]
In the above publication, as a first method for producing (plate making) a printing plate formed with an ink exuding portion that is a mirror image of a predetermined imprinted document and an ink non-exuding portion that is closed with continuous bubbles, continuous bubbles are produced. A thermal transfer sheet is superimposed on the surface of a porous sheet (stamp plate making substrate) that can be impregnated with a stamp ink, and an original sheet having a desired imprint is superimposed on the surface to form a mirror image. By irradiating infrared rays from above the original sheet in a compressed state, 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-exudation portion and a non-transfer portion. Has a marking surface to be an ink bleed portion.
[0004]
As a second method, a heating plate made of at least one selected from the group consisting of carbon and a polymer substance is stacked on the surface of a porous sheet having open cells and capable of being impregnated with stamp ink, The original sheet having a desired imprint made of a liquid-absorbing opaque sheet is infiltrated with a hardly volatile substance so that the imprinted original image becomes a mirror image, and then irradiated with flash light including infrared rays from the original sheet side. The heating plate corresponding to the portion other than the original image generates heat and melts the surface of the porous sheet to become an ink non-exuded portion, while the surface of the porous sheet corresponding to the imprint original image does not melt and the ink extruding portion It is disclosed to have a marking surface.
[0005]
In these plate making methods, on the light irradiation side, an original sheet is placed on an acrylic transparent support plate, and then a thermal transfer sheet and a heating plate are stacked thereon, and further a porous sheet is stacked thereon, A pressure is applied to the upper part by a pressing plate, and flash light is emitted from the transparent support plate side by a flash valve or the like.
By the way, as a method of manufacturing the porous sheet (stamp plate-making substrate), a soft synthetic resin material such as urethane resin and at least a foaming agent are mixed, and the nozzle 100 having a flat opening area shown in FIG. Extruded to form a flat continuous plate-shaped original plate 101, and this original plate 101 is sliced in an appropriate thickness direction to obtain a predetermined thickness, and then cut into predetermined lengths and width dimensions for use. It was.
[0006]
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 thick inner diameter side by the foaming agent is rubbed by the opening edge 100a of the nozzle 100 while being rubbed with water or the like. Since it is released into the liquid, as shown in FIGS. 2 (a) and 2 (b), the open area of the pores 104 of the open cell 102 exposed to the wide surface (skin surface) 101a of the original plate 101 is small. Thus, the portion of the soft synthetic resin material 103 is deformed. Since the pores 104 having such a small area are formed almost uniformly on the entire skin surface 101a of the original plate 101, when the skin surface 101a is used as a printing surface, an appropriate amount of stamp ink impregnated in the open cell 102 is pushed out. Since the imprint imprinted on the paper does not bleed out so that there is too much stamp ink, a clean and clear stamp can be obtained.
[0007]
[Problems to be solved by the invention]
However, as in the case where the original plate 101 is sliced in the thickness direction as when cut along the line cc in FIG. 2A, the pore area of the open cell 102 is exposed as the pores 104 as it is. As shown in FIG. 2 (c), since the pores 104 are large and have variations, when this slice surface is used as the stamp surface, the stamp ink impregnated in the open cell 102 is likely to be pushed out in a large amount and the imprint is blurred. There was a problem that the stamp could not be clean.
[0008]
In order to solve this problem, if the opening area of the nozzle 100 is formed in an extremely thin flat shape so that the original plate 101 has the same thickness (thin) as the plate making substrate of the stamp to be finally used, the nozzle When the material is extruded from 100, the resistance that the nozzle 100 receives from the material is large, the material cannot be pushed out quickly, and it takes a very long time to extrude, resulting in poor production efficiency of the plate making substrate. .
[0009]
The present invention has been made to solve these problems of the prior art, and manufacture of a plate making substrate for a stamp that can reliably perform good plate making over the entire surface of a porous sheet having a large area. It is intended to provide a method.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a method for producing a stamp plate-making substrate according to claim 1 is a method for producing a porous stamp-making substrate having open cells, wherein a soft synthetic resin such as a urethane resin is used. A material 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 to be divided into a plurality of plate-making substrates. At least one of the wide surfaces is heated and pressed with a heating plate having a smooth surface.
[0011]
According to a second aspect of the present invention, there is provided a method for producing a stamp plate-making substrate according to the second aspect of the invention, in the method for producing a porous stamp-making substrate having open cells, 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 to be divided into a plurality of plate-making substrates, and then the sliced surface is applied to the transparent support plate. Light energy is irradiated from the transparent support plate side in a state where a pressing force is applied in the direction of the transparent support plate to the plate-making substrate placed in contact therewith.
[0012]
According to a third aspect of the present invention, in the method for manufacturing a stamp plate-making substrate according to the second aspect, the light energy is irradiated by placing a light source body disposed below the transparent support plate in the transparent support plate. And is lit while being moved substantially in parallel.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment embodying the present invention will be described. As shown in FIG. 1, a soft synthetic resin material such as urethane resin and at least a foaming agent are mixed and extruded from a nozzle 100 with a flat opening to form a continuous plate-shaped and thick original plate 101 as in the prior art. To do. The basic material is a polyolefin resin, a polyvinyl chloride resin, a polyurethane resin, etc., and may contain carbon black or a light energy attracting substance dispersed therein or may not contain these.
In the embodiment, the original plate 101 has a thickness (1 mm to 5 mm) of the final stamp-making substrate 105 as shown in FIG. 7A, and can be sliced into about 3 to 10 sheets. Thickness. Further, the width of the original plate 101 is about 1 m, and a large number of the plate-making substrates 105 can be taken.
[0014]
Next, as shown in FIG. 3A, the original plate 101 is sliced so that a plurality of (four in the illustrated embodiment for simplicity) plate making substrates 105 can be taken in the thickness direction. This slicing method is performed by a mechanical method using a cutter.
The plate making substrate 105 sliced in this way has a skin surface 101a that is rubbed at the opening edge 100a of the nozzle 100 as described above on one wide side, and the other surface is left as it is. A wide sliced surface of the slice surface 101b is formed (see FIG. 3B).
[0015]
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. 4). ). At this time, for example, when the soft synthetic resin material is urethane resin, its melting point is 120 ° C., so the heating temperature of the heating plate 110 is about 119 ° C., and the pressing by the smooth surface 110a and the heating energy The area of the pores 104 exposed on the slicing surface 101b of the plate-making substrate 105 is reduced to form a surface 105a that approximates (similarly) the 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.
[0016]
When both the wide surfaces of the plate-making substrate 105 are slice surfaces 101b, the both surfaces of the finished plate-making substrate 105 are heated by sandwiching both surfaces between two heating plates 110 and heating them. It may be formed on the surface 105a that is similar to (similar to) 101a (see FIG. 5B).
FIG. 6 shows a second embodiment of the production method of the present invention. For example, PET (polyethylene terephthalate: melting point about 230) having a melting point higher than the melting point of the soft synthetic resin material on the upper surface of the transparent support plate 112 such as a glass plate. The plate-making substrate 105 that does not contain carbon black or a light energy attractive substance is placed through a heating sheet 113 made of (° C.) so that the slice surface 101b faces, and a pressing plate is placed from above the plate-making substrate 105. A pressing force is applied at 114, and strong light energy is irradiated from below the transparent support plate 112 by lighting a halogen lamp or the like. In addition, it is preferable to use the heating sheet 113 in which a black pigment such as carbon black is mixed in advance or printed on the surface.
[0017]
By such light irradiation, light energy is absorbed by the heating sheet 113, the heating sheet 113 is heated, and the surface of the slice surface 101 b of the plate-making substrate 105 is lightly melted by the heat, and the pores 104 exposed on the surface are exposed. Thus, the slice surface 101b of the plate-making substrate 105 can be formed on the surface 105a that approximates (similarly) the clean skin surface 101a as in the above-described embodiment.
[0018]
In this case, although not shown, when the lamp is turned on while continuously moving a halogen lamp or the like along the lower surface of the transparent support plate 112, even if the slice surface 101b of the plate-making substrate 105 has a large surface area, it approximates the skin surface 101a. The (similar) surface 105a can be formed uniformly.
In the case of the plate-making substrate 105 containing carbon black or a light energy attractive substance dispersedly, the heating sheet 113 can be omitted, that is, the surface of the plate-making substrate 105 by the irradiated light energy. This is because, as a result of heating the nearby carbon black or light energy attractive substance, the resin material in the vicinity of the surface of the plate-making substrate 105 can be melted to reduce the area of the exposed pores 104.
[0019]
In the Examples, the weight ratio of the carbon black or the light energy attractive substance contained is 1.0% by weight to 1.5% by weight with respect to the polyurethane-based foamed resin. In addition, the content rate of carbon black is not limited to this, What is necessary is just the range of 0.1 weight%-15 weight%. If the carbon black content is greater than 15% by weight, the surface of the plate-making substrate 105 itself will be black, and it will not be possible to determine the color of the applied stamp ink, and it is also possible to know whether the stamp ink has been applied. There is a drawback that it disappears, and if it is less than 0.1% by weight, there is a problem that sufficient heat generation cannot be obtained and the surface of the plate-making substrate 105 cannot be melted. Examples of the light energy attractive substance include silver chloride and silver bromide.
[0020]
Next, a plate making method will be described. A plate making substrate 105 in which carbon black or a light energy attractive substance is dispersed and contained in a porous material that has open cells and can be impregnated with stamp ink is used. In the case of plate-making, light-opaque light of any color such as black, white, gold, silver, etc. is previously formed on the surface of a light-transmitting paper such as PPC paper (tracing original paper) as the original sheet 116. A non-transparent line segment 119 is drawn with ink, oil-based marker, paint, paint, or the like.
[0021]
On the other hand, a transparent sheet 117 is prepared to be interposed between the original sheet 116 and the wide lower surface 105 a of the plate-making substrate 105. The transparent sheet 27 has a property of melting at a temperature higher than the melting point of the plate-making substrate 105 (about 120 ° C. for a soft polyurethane resin and about 70 ° C. for a soft polyolefin resin). As an example, a transparent PET (polyethylene terephthalate) resin film having a high melting point (about 230 ° C.) is preferable, and the thickness of each sheet is about 0.025 mm to 0.2 mm.
[0022]
Next, the original sheet 116 is placed on the transparent support plate 118 so that the image line portion 119 faces upward, and then the transparent sheet 117 is overlaid thereon, and the plate-making substrate 105 is further placed on the pore-exposed side surface. Then, the light is irradiated from the lower surface side of the transparent support plate 118 by a flashing operation of a flash lamp or a xenon lamp or a continuous lighting operation of a halogen lamp.
[0023]
When light is irradiated in this manner, the light energy that has passed through the portion other than the image line portion 119 (non-image line portion) on the original sheet 116 passes through the transparent sheet 117 as it is (see FIG. 7C). The carbon black in the vicinity of the surface (light irradiation side surface) corresponding to the portion other than the image line portion 119 (non-image line portion) in the plate making substrate 105 at the surface absorbs heat, and other than the image line portion 26a in the plate making substrate 105. When the surface portion corresponding to the portion (non-image portion) is heated and melted and then solidified, the pores 104 on the surface are closed to form a non-exuded portion 120 having a predetermined thickness (FIG. 7D). ) And FIG.
[0024]
On the other hand, if the image line portion 119 of the original sheet 116 is black containing carbon, the image line portion 119 is heated by the light energy irradiated from the direction of the transparent support plate 118, and the temperature rises. The transparent sheet 117 corresponding to the line portion 119 conducts heat in the transverse direction within the thickness of the sheet. In other words, the heat generated on the side of the original sheet 116 is absorbed and dispersed by the transparent sheet 117, and the surface portion of the plate-making substrate 105 corresponding to the image line portion 119 is not heated and follows the shape of the image line portion 119. Thus, the ink exuding portion 121 is formed with the pores 104 exposed. When the image line portion 119 is other than black, light energy is blocked / reflected by the image line portion 119, and the surface portion of the plate-making substrate 105 corresponding to the image line portion 119 is not heated and has no pores. 104 becomes the exposed ink extruding part 121.
[0025]
Accordingly, 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, the image line portion 119 in the original sheet 116 is obtained as shown in FIGS. As shown in FIG. 2, the ink extruding portion 121 is formed with the pores 104 in the shape of the mirror image being exposed, and the ink non-exuding portion 120 corresponding to the non-imaged portion is formed on the wide surface 105a of the plate-making substrate 105. It can be made as a plate.
[0026]
Preferably, the transparent sheet 117 is formed between the transparent sheet 117 and the wide surface of the plate-making substrate 105 by sandblasting the surface that contacts the wide surface of the plate-making substrate 105, or by applying fine embossing or embossing. When the image line portion 119 of the original sheet 116 is black ink, the heat generated in the image line portion 119 is efficiently absorbed and dispersed by the transparent sheet 117 and used for plate making. Since it is not transmitted to the surface direction of the substrate 105, the pores in the shape of the mirror image of the image line portion 119 remain exposed, and the effect of clearing the imprinted edge of the ink exuding portion 121 is achieved.
[0027]
The image line portion 116 of the original sheet 116 is directly formed on the surface of the plate-making substrate 105 in which a light energy attracting substance such as carbon black is dispersed in a porous material that has continuous bubbles and can be impregnated with stamp ink. The light irradiation described above may be executed from the document sheet 116 side in close contact. In this case, the surface of the plate-making substrate 105 facing the image line portion 119 is also heated and melted and then solidified, so that the formed non-exuded portion is in close contact with the image line portion 119. When peeled off, the ink non-exuded portion is peeled off according to the shape of the overhead wire portion 119, and the ink exuded portion 121 according to the imprint can be formed.
[0028]
In another embodiment, the plate-making substrate 105 is composed of a porous sheet that does not contain carbon black or a light energy attracting substance, has open cells, and can be impregnated with stamp ink. Same as above.
In this case, as the heating sheet that comes into contact with the wide surface of the plate-making substrate 105 (the surface where the pores are exposed), a black pigment such as carbon black previously mixed or printed on the surface is used. In this embodiment, in the main heating operation, light irradiated from the transparent support plate 118 side passes through the original sheet 116 and is heated by light energy absorbed by the black heating sheet at a position corresponding to the non-image portion. Since the surface of the plate-making substrate 105 facing is once melted by the heat and then solidified, the stamp ink does not bleed into the ink non-bleeded portion 120, and the light does not pass through the portion corresponding to the image line portion 119. The pores 104 in the shape of the mirror image of the image line portion 119 in the original sheet 116 remain exposed to form the ink exuding portion 121, and can be made as a stamp S with a predetermined marking surface.
[0029]
【The invention's effect】
The method for producing a plate making substrate for a stamp according to claim 1 is the method for producing a plate making substrate for a porous stamp having open cells, and comprises a soft synthetic resin material such as urethane resin and at least a foaming agent. Mixing and extruding from a nozzle with a flat opening to form a thick original plate, slicing the original plate in the thickness direction and dividing it into a plurality of plate-making substrates, and then at least one of the wide surfaces of the plate-making substrate The surface is heated and pressed by a heating plate having a smooth surface.
[0030]
Since the thick original plate is sliced into thin ones, compared to the case where an extremely thin one is extruded from the nozzle from the beginning, the growth of the open cells inside tends to be uniform and flat. It is easy to produce a large number of substrates for plate making with a wide surface. Then, if the slice surface of the original plate is heated / pressed with a heating plate having a smooth surface, the surface is melted slightly (reasonably) and the pores of a large area exposed on the slice surface are reduced, and the heating / After pressing, when the heating plate is removed and the surface of the plate-making substrate is solidified by cooling or the like, the plate is smooth and has a smooth and flat surface with a small surface area of the exposed pores and uniform thickness. There is an effect that a circuit board can be produced.
[0031]
Therefore, there is an effect that the quality of the subsequent plate making and the stamp surface is improved.
According to a second aspect of the present invention, there is provided a method for producing a stamp plate-making substrate according to the second aspect of the invention, in the method for producing a porous stamp-making substrate having open cells, 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 to be divided into a plurality of plate-making substrates, and then the sliced surface is applied to the transparent support plate. Light energy is irradiated from the transparent support plate side in a state where a pressing force is applied in the direction of the transparent support plate to the plate-making substrate placed in contact therewith.
[0032]
In place of the heating plate according to claim 1, even when light energy is applied, the surface of the plate-making substrate is melted moderately, and the large-area pores exposed on the slice surface are reduced, and are smooth and exposed. The effect of being able to produce a thin plate-making substrate having a smooth and flat surface with a small and uniform pore area is the same, and the other effects according to the invention of claim 1 are the same. How can you play about the effect.
[0033]
According to a third aspect of the present invention, in the method for manufacturing a stamp plate-making substrate according to the second aspect, the light energy is irradiated by placing a light source body disposed below the transparent support plate in the transparent support plate. Therefore, it is possible to manufacture a plate-making substrate even if a stamp plate-making machine is used.
[Brief description of the drawings]
FIG. 1 is a perspective view of an original plate manufacturing method.
2A is an enlarged side cross-sectional view of the main part of the original plate, FIG. 2B is a cross-sectional view taken along the line bb, and FIG. 2C is a cross-sectional view taken along the line cc.
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-making substrate is heated and pressed by a heating plate.
FIG. 5A is a cross-sectional view of the plate-making substrate after heating and pressing only one wide side, and FIG. 5B is a cross-sectional view of the plate-making substrate after heating and pressing both wide sides.
FIG. 6 is an explanatory diagram of a method of heating by light irradiation in a state where a plate-making substrate is pressed.
7A is a perspective view of a plate-making substrate, FIG. 7B is a cross-sectional view showing 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 sectional drawing of the state which separated the board | substrate for platemaking from the transparent sheet.
FIG. 8 is a perspective view of a stamp in a state of plate making finished.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 100 Nozzle 100a Opening edge 101 Original plate 101a Skin surface 102 Open cell 103 Soft synthetic resin material 104 Pore 105 Plate-making board 110 Heating plate 110a Smooth surface 111 Support plate

Claims (3)

In a method for producing a substrate for making a porous stamp having open cells, a soft synthetic resin material such as urethane resin and at least a foaming agent are mixed and extruded from a flat opening nozzle to form a thick original plate, Is 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 with a heating plate having a smooth surface. A method for producing a stamp-making substrate. In a method for producing a substrate for making a porous stamp having open cells, a soft synthetic resin material such as urethane resin and at least a foaming agent are mixed and extruded from a flat opening nozzle to form a thick original plate, A state in which a pressing force is applied in the direction of the transparent support plate to the plate making substrate placed in contact with the slice surface on the transparent support plate. Irradiating light energy from the transparent support plate side with a stamping plate making substrate manufacturing method. 3. The plate making substrate for stamps according to claim 2, wherein the irradiation of the light energy is performed by moving a light source disposed below the transparent support plate in a substantially parallel manner to the transparent support plate. Manufacturing method.

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