JP3858334B2 - Stamp making machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes a photographic image or the like with a halftone (intermediate color) and white background image or the like is related to apparatus for producing a stamp printing plate was mixed.
[0002]
[Prior art]
Conventionally, a stamp or the like is used to print a printed image such as a picture or a character on a postcard or paper. Japanese Examined Patent Publication No. 7-115532 describes a method of manufacturing a photographic stamp in which a half-tone human photograph is superimposed on a pure white background image. In this manufacturing method, an image such as a desired person photograph is read by a scanner, and a halftone dot photo is created by burning paper in the shade of the photographic image with the size of the halftone dot. The halftone dot image is cut out to create a person image portion and a background image portion. The person image portion is put on a transparent film and printed on a positive film to create a person image net positive film. On the other hand, the background image portion is stretched on a transparent film, and the transparent film is turned upside down and baked on a negative film to create a background image film. Thereafter, a person image net positive film is laminated on the photosensitive resin plate and exposed to form a person image resin plate. On the other hand, the background image film is turned upside down, laminated on another photosensitive resin plate and exposed to create a background image resin plate. Both of these resin plates are uniformly heated and alternately brought into contact with the surface of the foamed resin plate, thereby producing a stamp printing plate in which a pure white background image and a photographic image having a halftone are mixed.
[0003]
[Problems to be solved by the invention]
However, in the above method, it is necessary to prepare two types of molds, a person image resin plate and a background image resin plate, and these two types of molds are alternately brought into contact with the surface of the foamed resin plate. Thus, there is a problem in that the stamp printing plate is manufactured, and there is a portion where they overlap each other, and the printed image of the portion becomes unclear.
[0004]
The present invention has been made to solve the above problems, providing a stamp printing die manufacturing apparatus capable of the part and white part of the half-tone is easily produced a clear stamp printing plate was mixed The purpose is to do.
[0005]
[Means for Solving the Problems]
In order to achieve this object, the stamp printing plate manufacturing apparatus according to claim 1 comprises a heating means for heating and melting and solidifying a surface of a porous sheet having open cells and impregnated with stamp ink, A stamp printing plate according to the above-mentioned printing image by selectively driving the means according to the printing image, and forming an ink non-penetrating portion through which ink does not permeate on the surface of the porous sheet. A control means for forming a heating part, a heating part surrounded by the heating part among the heating parts heated by the heating means, and a second heating part determined by the determination means the second heating portion, Bei a heating amount control means for applying a second heating amount causing no leaving the melting of the first heating amount than the high energy which may occur in the left melt is applied to the heated portion by said heating means To have.
[0006]
According to the stamp printing plate manufacturing apparatus according to claim 1, the control means selectively drives the heating means according to the print image to selectively melt and solidify the surface of the porous sheet, so that the ink non-permeating ink can be prevented. Form exudate. As a result, a stamp printing plate according to the print image is formed on the surface of the porous sheet in combination with the ink oozing part through which the ink passes. The heating by the heating means is performed with a low energy first heating amount so as to leave a melt, but for the heating part (the heating part surrounded by the heating part) determined as the second heating part by the determining means, The heating means is controlled by the heating amount control means, and the heating is performed with the second heating amount that does not cause a residual melt that is higher in energy than the first heating amount.
[0007]
The heated portion becomes an ink non-exuding portion, but the ink non-exuding portion heated by the first heating amount causes a halftone (intermediate color) adjacent to the ink exuding portion due to a residual melt. On the other hand, the non-exuded portion of the ink heated with the second heating amount is a white portion with no melt residue. Therefore, it is possible to easily manufacture a stamp printing plate in which a halftone portion and a white portion are mixed.
[0008]
A stamp printing plate manufacturing apparatus according to a second aspect of the present invention is the stamp printing plate manufacturing apparatus according to the first aspect, wherein the printed image is a photographic image.
[0009]
The stamp printing plate manufacturing apparatus according to claim 3 is the stamp printing plate manufacturing apparatus according to claim 1 or 2, wherein the heating means includes a thermal head having a plurality of heating elements, and the second heating portion. Is provided with a prohibiting means for prohibiting the adjacently arranged. According to the stamp printing plate manufacturing apparatus according to the third aspect of the present invention, it operates in the same manner as the stamp printing plate manufacturing apparatus according to the first or second aspect, and the heating means is constituted by a thermal head. Since the adjacent arrangement of the two heating portions is prohibited, the number of heating elements that are heated by the high energy second heating amount at a time can be reduced.
[0010]
The stamp printing plate manufacturing apparatus according to claim 4 is the stamp printing plate manufacturing apparatus according to claim 3, wherein the heating amount control means changes the energization time or energization duty ratio of the thermal head to change the heating means. The amount of heating applied by is changed between the first heating amount and the second heating amount.
[0011]
The stamp printing plate manufacturing apparatus according to claim 5 is the stamp printing plate manufacturing apparatus according to claim 1 or 2, wherein the heating unit is configured by a laser unit that irradiates a surface of the porous sheet with a laser beam, The heating amount control means changes the heating amount applied by the heating means between the first heating amount and the second heating amount by changing the light diameter of the laser beam.
[0012]
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a foamed resin substrate as a porous sheet to be a printing plate. The foamed resin substrate 1 is composed of a rigid or semi-rigid polyolefin resin plate having fine open cells. As the material of the foamed resin substrate 1, a resin foam having fine open cells made of polyurethane, vinyl chloride resin, ABS resin, ethylene-vinyl acetate copolymer, or other resin can also be used. As these resin foams, those obtained by slicing into a flat plate shape are used except for the skin covering the outer surface after foaming. In addition, since fine pores connected to fine open cells of the foamed resin substrate 1 can be formed on the surface in contact with the mold for foaming, depending on the firing conditions, this contact surface is used as a marking surface. It is also possible to do.
[0014]
FIG. 2 is a perspective view showing a state in which the foamed resin substrate 1 of FIG. The printing plate member 7 is formed by pressing the periphery and side surface of the upper surface with a heated mold, leaving the convex region 2. Each surface 3 of the surface-pressed portion is melted and solidified by heating, and is covered with a thin film layer that does not transmit ink. For this reason, the pores 6 are left only in the convex region 2 that is not pressed and the back surface 4 thereof. A marking surface 18 is formed in the convex region 2 by subsequent processing, and the back surface 4 thereof becomes an ink supply surface to the convex region 2 to be the marking surface 18.
[0015]
FIG. 3 is a cross-sectional view of the stamper 10 on which the printing plate member 7 is mounted. The case body 12 of the stamper 10 is formed in a box-like body whose lower surface is opened by a resin or metal. Each member is accommodated.
[0016]
A side surface of the printing plate member 7 is fixed to the case body 12 with an adhesive 11 so that the convex region 2 protrudes from the lower surface of the case body 12. The impregnated body 13 is made of an elastic foam, non-woven fabric or sponge of a synthetic resin material (for example, polyethylene, polypropylene, polyethylene terephthalate, polyurethane, acrylonitrile butadiene rubber, etc.) and is saturated with oil-based ink. Has been. The ink impregnated in the impregnated body 13 is supplied to the convex region 2 through the open bubbles of the printing plate member 7 and used for printing. The lattice member 14 is a member formed in a lattice shape by ABS resin or the like, and is arranged with the squares directed in the vertical direction. The grid member 14 supplies the ink 17 to the impregnated body 13 and holds the stamping surface 18 on a flat surface when the stamper 10 is stamped.
[0017]
A cylindrical ink supply port 15 is provided at a substantially central portion of the upper surface of the case body 12, and a handle portion 16 is detachably inserted into the ink supply port 15. The ink 17 is supplied to the stamper 10 by removing the handle 16 from the case body 12 and pouring the ink 17 from the ink supply port 15.
[0018]
Next, with reference to FIG. 4, the mechanical configuration of a stamp printing plate manufacturing apparatus for manufacturing the stamp printing plate 60 by processing the printing surface 18 of the printing plate member 7 will be described. The stamp printing plate manufacturing apparatus includes a head switching rod 36 installed between the left and right subframes 32 and 33. The head switching rod 36 is guided by the head switching rod 36 and is shown in FIG. A carriage 34 that is movable in the left-right direction is provided. Mounted on the carriage 34 is a thermal head 30 having a plurality of (eg, 96) dot-like heating elements 31 arranged linearly in the front-rear direction in FIG. Below the thermal head 30, a cam body 35 that is formed in an elliptical shape and rotates as the head switching rod 36 rotates is provided. The head switching rod 36 is rotated by the rotation of the gear 37 fixed to the right end thereof, but the cam body 35 is rotated with the rotation of the head switching rod 36. In accordance with the rotation, each heat generating element 31 is moved to an ascending position where it abuts on the marking surface 18 of the stamper 10 and a descending position released from the marking surface 18. The gear 37 is configured to rotate in conjunction with an open / close door (not shown) that opens and closes the stamper insertion port of the stamp printing plate manufacturing apparatus. When the open / close door is open, the thermal head 30 is It is supposed to be in the lowered position. Therefore, the stamper 10 can be attached to and detached from the stamp printing plate manufacturing apparatus without bringing the stamp surface 18 into contact with the thermal head 30.
[0019]
FIG. 5 is a block diagram showing an electrical configuration of the stamp printing plate manufacturing apparatus. As shown in FIG. 5, the control unit 40 reads a CPU 41, a ROM 42, a RAM 43, a punching CG-ROM 44, a display CG-ROM 45 for display on the liquid crystal display 55, and a photographic image. An input interface 46 to which a scanner 52 and a keyboard 53 are connected and an output interface 47 are provided, and these are connected to each other by a bus line 48. The control unit 40 further includes a head drive circuit 49 for driving each heat generating element 31 of the thermal head 30 connected to the output interface 47 and a motor drive for driving the carriage feed motor 54 for operating the carriage 34. A circuit 50 and a display driving circuit 51 for driving the liquid crystal display 55 are provided.
[0020]
The ROM 42 is provided with a program memory 42a storing a control program for controlling each operation of the carriage 34, the thermal head 30, and the like, and a dictionary memory 42b used for kana-kanji conversion and the like. The RAM 43 has an input buffer 43a for storing data input from the scanner 52 and the keyboard 53, a punching buffer 43b for storing punching data in which the data in the input buffer 43a has been changed for punching, and various other works. (N) and a counter are provided. The CG-ROM 44 for punching stores dot pattern data of a large number of characters to be punched in association with code data, and the display CG-ROM 45 has display dots for a large number of characters to be punched. Pattern data is stored in association with code data.
[0021]
Next, a stamp printing plate manufacturing process in the stamp printing plate manufacturing apparatus configured as described above will be described with reference to the flowchart of FIG. In this process, the stamping surface 18 of the stamper 10 mounted on the stamp printing plate manufacturing apparatus is selectively melted and solidified according to the print image by the heating element 31 of the thermal head 30, and a thin film layer that does not transmit ink (ink non-exuded portion). The stamp printing plate 60 is manufactured in combination with an ink oozing portion through which ink remaining without being melted and solidified passes.
[0022]
First, a photographic image to be a print image is read by the scanner 52 (S1), and the white pixel portion of the image data (see FIG. 7) is stored as the first heating dot 71 in the input buffer 43a of the RAM 43 (S2). . FIG. 8A shows this state. That is, in FIG. 8A, the first heating dots 71 are indicated by shading, and the non-heating dots 73 are indicated by black painting. In the processing of S3 to S10, it is determined whether or not the second heating dot 72 is changed to the even-numbered and even-numbered dots in FIG. 8A and the odd-numbered and odd-numbered dots. is there.
[0023]
Here, the 1st heating dot 71 and the 2nd heating dot 72 are demonstrated. The first heating dot 71 is a dot that is heated by the heating element 31 of the thermal head 30 with a pulse with a duty ratio of 30% in the process of S11 (see FIG. 9A), and is capable of leaving a molten residue around. Low thermal energy is applied. On the other hand, the second heating dot 72 is a dot that is heated with a pulse with a duty ratio of 60% (see FIG. 9B), and high thermal energy that completely melts and solidifies the periphery is applied.
[0024]
Next, in order to check the image data read into the input buffer 43a line by line, the value of the work n in the RAM 43 is set to “0” (S3). If the value of n is an even number (S4: even number), for each dot in the even column of n rows, is that dot the first heating dot 71 and all the surrounding dots are the first heating dots 71? Whether or not it is checked based on the stored contents of the input buffer 43a (S5). As a result, for the dot satisfying the condition of S5 (S7: Yes), the attribute is changed from the first heating dot 71 to the second heating dot 72 (see FIG. 8B), and to the perforation buffer 43b of the RAM 43. It is written (S8). On the other hand, for the dots that do not satisfy the condition of S5 (S7: No), the first heated dots 71 or the non-heated dots 73 are written to the perforation buffer 43b without changing the attribute (see FIG. 8B). ).
[0025]
In the process of S4, if the value of n is an odd number (S4: odd number), for each dot in the odd row of n rows, the dot is the first heating dot 71 and all surrounding dots are the first heating. Whether or not it is a dot 71 is checked based on the stored contents of the input buffer 43a (S6). As a result, for the dot satisfying the condition of S6 (S7: Yes), the attribute is changed from the first heating dot 71 to the second heating dot 72 (see FIG. 8B) and written to the punching buffer 43b of the RAM 43. (S8). On the other hand, for the dots that do not satisfy the condition of S6 (S7: No), the first heating dot 71 or the non-heating dot 73 is written to the perforation buffer 43b without changing the attribute.
[0026]
Thereafter, the value of n is incremented by 1 (S9), and based on the value of n, it is checked whether or not the processing of S4 to S8 has been completed over all rows of the image data (S10). If the check of all lines is not completed (S10: No), the process proceeds to S4, and the processes of S4 to S9 are repeated until the check of all lines is completed.
[0027]
When all rows have been checked (S10: Yes), the heating elements 31 of the thermal head 30 are driven in synchronization with the drive of the carriage 34, and the printing surface 18 is heated (S11). This heating is performed based on the data stored in the perforation buffer 43b. The first heating dot 71 is heated by a pulse having a duty ratio of 30% (FIG. 9A), and the second heating dot 72 is heated by a pulse having a duty ratio of 60% (FIG. 9B). By heating, the portion of the first heating dot 71 is melted and solidified in a state where there is a molten residue around it, and a halftone (intermediate color) is created by the molten residue. On the other hand, the portion of the second heating dot 72 is completely melted and solidified without leaving any melt around it, and the pores 6 of the marking surface 18 of that portion are completely blocked. As a result, the portion of the second heating dot 72 is formed on a pure white printing surface even if there are black pixels such as dust and noise in the vicinity. The stamp 34 is manufactured by driving the carriage 34 and the thermal head 30 over the entire printing surface 18.
[0028]
FIG. 10 shows the stamp printing plate 60 manufactured by the above processing with the marking surface portion 18 facing upward. In the case where a photographic image, for example, a person photograph is used as the stamp stamp 60, it is desirable that the background is completely white to make the person part stand out, and that the person part is halftone so as to give a subtle change in brightness. It is. For this reason, in the stamp printing plate manufacturing apparatus of the present embodiment, each pixel is analyzed before heating the printing surface 18 (S5, S6), and the normal white pixel portion is set as the first heating dot 71 to which low thermal energy is applied. On the other hand, the first heating dot 71 surrounded by the first heating dot 71 is considered as a white part such as a background, and is set as the second heating dot 72 to which high thermal energy is applied. Based on the determination result, the pure white background portion 61 and the halftone image portion 62 are mixed by selectively melting and solidifying the printing surface 18 according to the image while controlling the heating energy. The stamp plate 60 can be manufactured.
[0029]
In manufacturing the stamp stamp 60, the image portion (person portion) 62 and the background portion 61 are automatically determined by the processes of S5 to S8 depending on the pixel arrangement, so that the operator does not need to determine the range. Thus, the manufacture of the stamp stamp 60 can be simplified. In addition, since the image portion (person portion) 62 and the background portion 61 can be created at a time, the manufacturing of the stamp plate 60 can be simplified in this respect as well.
[0030]
Further, only the even-numbered and even-numbered dots (S5) or the odd-numbered and odd-numbered dots (S6) can be the second heating dots 72, and the second heating dots 72 are present around the dots. The change to the second heating dot 72 is prohibited. Therefore, the second heating dots 72 to which high heat energy is applied are not adjacently arranged, so that the heat storage of the thermal head 30 is suppressed and the life thereof can be extended. Further, since the second heating dots 72 are not arranged adjacent to each other, the number of heating elements 31 that are turned on at a time with high energy can be reduced. Therefore, the capacity of the power source can be reduced correspondingly, and the product cost can be reduced.
[0031]
In addition, as a determination means of Claim 1 in a present Example, the process of S4 to S8 corresponds, and the process of S11 corresponds as a heating amount control means. Further, the prohibiting means according to claim 3 corresponds to the processes of S5 and S6.
[0032]
The present invention has been described based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various improvements and modifications can be easily made without departing from the spirit of the present invention. It can be guessed.
[0033]
For example, in the stamp printing plate manufacturing apparatus of this embodiment, the heating energy level is changed by changing the energization duty ratio of the heating element 31 of the thermal head 30 between 30% and 60%. However, instead of this, the heating energy level may be controlled by changing the on-time (energization time) of the heating element 31. Note that it is naturally possible to control the energization duty ratio to other than 30% and 60%, or to control the level of the heating energy in two or more stages.
[0034]
Further, as a heating means, a CO2 laser may be used instead of the thermal head 30. In this case, the heating energy level can be controlled by changing the light diameter of the laser beam.
[0035]
【The invention's effect】
According to the stamp printing plate manufacturing apparatus according to claim 1, as the heating energy applied to the surface of the porous sheet, the first heating amount that can cause a melting residue and the second heating that does not cause a higher energy melting residue. The portion heated by the first heating amount brings out a halftone (intermediate color), and the portion heated by the second heating amount is made pure white. Therefore, it is possible to easily manufacture a stamp printing plate in which halftone parts and white parts are not overlapped without preparing two types of molds, that is, halftone parts and white parts. There is an effect that can be done. In addition, since the heating part surrounded by the heating part is the second heating part heated by the high energy second heating amount, the operator does not need to divide the range between the halftone part and the white part. Thus, there is an effect that the stamp printing plate can be easily manufactured.
[0036]
According to the stamp printing plate manufacturing apparatus according to claim 2, in addition to the effect produced by the stamp printing plate manufacturing apparatus according to claim 1, it is possible to manufacture a stamp printing plate in which a halftone portion and a white portion are mixed. Therefore, even if a photographic part having a halftone is superimposed on a pure white background part, both parts can be formed clearly and the photographic part can be made to stand out.
[0037]
According to the stamp printing plate manufacturing apparatus according to claim 3, in addition to the effect of the stamp printing plate manufacturing apparatus according to claim 1 or 2, the number of heating elements heated at a high energy second heating amount at a time. Therefore, there is an effect that it is possible to extend the life of the thermal head by suppressing head destruction due to thermal storage of the thermal head. Along with this, there is an effect that the capacity of the power source can be reduced.
[0038]
According to the stamp printing plate manufacturing apparatus according to claim 4, in addition to the effect exhibited by the stamp printing plate manufacturing apparatus according to claim 3, the heating amount applied by the heating means depends on the energizing time or the energizing duty ratio of the thermal head. Changed. Therefore, since the amount of heating can be changed by one type of applied voltage, it is not necessary to generate two or more types of applied voltage, and the product cost can be reduced accordingly.
[0039]
According to the stamp printing plate manufacturing apparatus according to claim 5, in addition to the effect exhibited by the stamp printing plate manufacturing apparatus according to claim 1 or 2, the amount of heating applied by the heating means is changed by the light diameter of the laser beam. Therefore, the amount of heating can be easily changed, and the product cost can be reduced accordingly.
[Brief description of the drawings]
FIG. 1 is a perspective view of a foamed resin substrate as a porous sheet according to an embodiment of the present invention.
FIG. 2 is a perspective view of a printing plate member obtained by pre-processing a foamed resin substrate.
FIG. 3 is a cross-sectional view of a stamper on which a printing plate member is mounted.
FIG. 4 is a cross-sectional view of a stamp printing plate manufacturing apparatus equipped with a stamper.
FIG. 5 is a block diagram showing an electrical configuration of the stamp printing plate manufacturing apparatus.
FIG. 6 is a flowchart showing a stamp printing plate manufacturing process.
FIG. 7 is a diagram showing image data to be a print image.
8A is a diagram illustrating an example of image data read into an input buffer of a RAM, and FIG. 8B is a diagram illustrating writing into a punching buffer after the attributes of the image data of FIG. It is a figure showing an example.
FIGS. 9A and 9B are diagrams showing heating pulses applied to the heat generating elements of the thermal head, wherein FIG. 9A is a diagram of heating pulses of the first heating dots with a duty ratio of 30%, and FIG. 9B is a duty ratio of 60; It is a figure of the heating pulse of the 2nd heating dot of%.
FIG. 10 is a perspective view of a stamp printing plate on which a photographic image is formed on a stamp surface.
[Explanation of symbols]
1 Foamed resin substrate (porous sheet)
6 Pore (open cell)
7 Stamping plate 10 Stamper 17 Ink (stamp ink)
18 Marking surface 30 Thermal head (heating means)
31 Heating element 40 of thermal head Control unit (control means)
43 RAM
43a Input buffer 43b Perforation buffer 60 Stamp plate 61 Background portion 62 Image portion 71 First heating dot (heating portion)
72 Second heating dot (second heating part)
73 Unheated dots

Claims (5)

Heating means for heating and melting and solidifying the surface of the porous sheet that has open cells and can be impregnated with stamp ink, and selectively drives the heating means according to the image to transmit the ink to the surface of the porous sheet. In a stamp printing plate manufacturing apparatus comprising a control means for forming an ink non-bleeding portion that does not transmit ink in addition to the ink bleeding portion to be formed, and forming a stamp printing plate according to the printing image,
Determining means for determining, as a second heating part, a heating part surrounded by the heating part among the heating parts heated by the heating means;
Heating that causes the second heating portion determined by the determining means to apply a second heating amount that does not cause a melting residue higher in energy than the first heating amount that can occur in the melting residue applied to the heating portion. A stamp printing plate manufacturing apparatus comprising a quantity control means.   2. The stamp printing plate manufacturing apparatus according to claim 1, wherein the printed image is a photographic image. The heating means is constituted by a thermal head having a large number of heating elements,
The stamp printing plate manufacturing apparatus according to claim 1, further comprising a prohibiting unit that prohibits the second heating portion from being adjacently disposed.   The heating amount control means changes the heating amount applied by the heating means between the first heating amount and the second heating amount by changing an energizing time or an energizing duty ratio of the thermal head. The stamp stamp plate making apparatus according to claim 3. The heating means is constituted by a laser means for irradiating the surface of the porous sheet with a laser beam,
2. The heating amount control means changes the heating amount applied by the heating means between the first heating amount and the second heating amount by changing the light diameter of the laser beam. Or the stamp stamp production apparatus of 2.

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