JPH0811219A - Photo carving system of matrix of rubber stamp - Google Patents

Abstract

PURPOSE:To form a rubber stamp in which an outline of a character is thin and the bottom is bold without making use of an etching liquid, by a method wherein photo-setting resin is used, a bottom sphere is formed of a second two-dimensional data, a slope sphere is formed by a fixed ratio between the second and first two-dimensional data by moving a base to a specific direction and a stamp sphere is formed of the first two-dimensional data. CONSTITUTION:A laser beam is projected to liquid surface 32 of a photo-setting resin liquid 31. A base 33 supporting resin wherein a movement is controlled in a direction Z and photo-setting is performed is arranged directly below the liquid surface. In the second two-dimensional data, the bottom sphere 35 of a rubber stamp is formed by curing by setting the light from a scanner on the second Z coordinate point. Then the base 33 is moved in the direction Z, that is, in the lower direction and a contour section of a slope sphere 36 of a character is cured in order, based on a fixed ratio between the second and first two-dimensional data. A stamping sphere of the rubber stamp is cured by scanning based on the first two-dimensional data and a three- dimensional shell of a matrix of the rubber stamp is formed. The three-dimensional shell is peeled off from the base 33 and a separate photo-setting resin layer is formed on the rear.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber stamp stereolithography system for developing two-dimensional data of a character string in three dimensions based on outline font technology.

[0002]

2. Description of the Related Art The process for manufacturing a rubber stamp for office equipment is generally as follows. First, a typesetting machine is used to create a plate having a plurality of rubber stamps, the plate is attached to a mount, and a photograph is taken to create a negative. This negative expands from the plate to 102% as the rubber stamp shrinks during the pressing process and then corrects the pinholes in the negative. This enlarged negative is exposed to light with a photosensitive resin, for example, Rigiron, and then washed with water to wash away the unexposed portion to form a convex mother die in which a character region is projected. After being dried, this convex mother die completely solidifies the surface by post-exposure.

This convex lysilon is laminated with another thermosetting resin such as a phenol plate and pressed at 150 ° C. to form a concave phenol mother die. When this concave master block is overlapped with red rubber and pressed at 150 degrees for 7 minutes, a rubber portion of a rubber stamp can be formed. It takes about 2 hours from the end of phototypesetting. The pressed red rubber is cut into individual pieces, and each rubber stamp portion is adhered to the rootstock to form individual rubber stamps.

Japanese Patent Publication No. 9660 to Japanese Patent Publication No. 4-966
In No. 2, the solution of the photo-curable resin is irradiated with light such as ultraviolet rays based on the three-dimensional data to cure the exposed part,
A method and apparatus for creating an arbitrary solid (three-dimensional object) is disclosed. This method decomposes three-dimensional data into a plurality of contour lines (two-dimensional data), scans and projects each contour line on the liquid surface of the photocurable resin solution, and gradually dips the hardened contour to form an arbitrary solid body. are doing.

Also, the Nikkei Sangyo Shimbun dated October 26, 1993 reports that Asahi Kasei Kogyo has developed a plastic stamp made of a photosensitive resin. This photosensitive resin is initially a high-viscosity liquid and is solidified by light rays such as ultraviolet rays. Therefore, this high-viscosity photosensitive resin is poured into a glass container having a depth of 5 mm, for example, and the master film on which the original is printed is brought into close contact with the surface of the resin liquid and exposed from the upper and lower sides to expose the exposed portion, that is, the base. The part and the streak part are solidified. The partially solidified photosensitive resin is soaked in an etching solution and etched after removing the block film to form a stamp. In addition to this, penetration marks (Shachihata name (registered trademark), etc.), direct plates (solidified by ultraviolet rays), and CAD data are used to scrape the phenol plate using a three-dimensional engraving machine (JP-A-1-272482, etc.). Techniques are known.

[0006]

First, the method of washing the first unexposed portion with water is time-consuming and labor-intensive, and it involves the disposal of the photosensitive resin, phenol resin, and washing water after use, but carelessly. Disposal causes pollution. In addition, when the photosensitive resin plate is washed with water, the contour of the character becomes a cross section in which the trapezoid is reversed, as the deeper the moat, the side face is scooped and the bottom part is thinner than the surface. There is a fear.
Therefore, characters with thin lines or characters with many strokes cannot be used.

Japanese Patent Publication No. 9660 to Japanese Patent Publication No. 4-966
The three-dimensional formation method and apparatus according to No. 2 is convenient for forming a three-dimensional body of an arbitrary shape, but on the other hand, enormous amounts of three-dimensional data are required. When this technique is applied to the formation of a rubber stamp mold, since the shape of the rubber stamp mold is on a simple extension of the two-dimensional shape, the three-dimensional data includes a considerable amount of redundant data.

Further, a photosensitive resin plate of a type in which a mark is directly formed by etching after mask exposure is fragile as a mark and lacks durability. Further, when the photosensitive resin plate is immersed in the etching solution, the deeper the etching amount,
There is a risk that the side of the outline of the character will be scooped out and the bottom part will be thinner than the surface. Therefore, characters with thin lines or characters with many strokes cannot be used. The engraving method using CAD does not support advanced typesetting and takes time, and the correction software is also poor.

It is an object of the present invention to form a rubber stamp having a trapezoidal cross section in which the bottom portion is thick even if the contour of the character, that is, the neck or the surface portion of the side is thin, without using a cleaning liquid or an etching liquid. It is to provide a stereolithography system of a rubber stamp mold capable of performing.

[0010]

A rubber stamp mold stereolithography system according to the present invention includes a means for developing a contour of a character into first two-dimensional data and a contour of the character, that is, two-dimensional data with a radius r. Means for integrating the envelope to obtain the second two-dimensional data, a container filled with the photocurable resin liquid, and a ray controlled on the basis of the first and second two-dimensional data, X, A scanner that deflects in the Y direction to focus on the liquid surface of the photocurable resin liquid, a substrate that supports the cured resin and can move in the Z direction from immediately below the liquid surface, and a light beam from the scanner First, a bottom region is formed by scanning based on the second two-dimensional data, and then the second two-dimensional data and the first two-dimensional data corresponding to the movement are moved while moving the substrate in the Z direction. Scan the gradient area based on a predetermined ratio with the data Form, and a control means for forming a mark region is scanned on the basis of the finally the first two-dimensional data.

According to the embodiment of the stereolithography system of the rubber stamp mold according to the present invention, for example, PostScript (PostSc) is used.
ript) or TrueType character, means for expanding the outline of this character into first two-dimensional data, and means for expanding the outline of the bold font of this character into second two-dimensional data , The first two-dimensional data is developed at a first Z coordinate point, the second two-dimensional data is developed at a second Z coordinate point, and an intermediate point between these first and second Z coordinate points Two-dimensional data is linearly interpolated.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a rubber stamp mold stereolithography system according to the present invention will be described below with reference to the drawings.

First, as shown in FIG. 1, a rubber stamp mold stereolithography system according to the present invention includes a commercially available computer system 1 (for example, Macintosh of Apple Inc.). The computer system 1 includes a keyboard 2, a display unit 3 and a mouse 4, and a fixed disk 5 incorporated therein has a program, for example, PageMaker by Ardus Co., which writes characters in a Postscript language.

When the computer system 1 is turned on and the PageMaker program is started, an unnamed file is created and characters can be input. If you input the desired character string from the keyboard 2,
This character string is displayed on the display (screen) 3 of, for example, 480 × 640 dots, and the outline data of each character is stored in a coordinate system called Postscript language.

That is, each character is, as shown in FIG. 2, first a local coordinate point 13 represented by a base point 12 of the expansion frame 11,
A contour obtained by converting from the character code and the character size, and a plurality of groups of line drawing coordinate points 14 (only three points are shown) with the local coordinate point 13 as a reference point, and connecting the coordinate points of each group with a Bezier curve Have data.

Therefore, the outline data of the character is stored in the first area of the memory 6 and is first stored by the rasterizer 7.
2D data (X-axis component and Y-axis component). The rasterizer 7 develops, for example, the outline of an outline font surrounded by Bezier curves into a bitmap of XY coordinates.

As shown in FIG. 3, the outline of the character 21, for example, the character 21 such as the character "b", that is, the first two-dimensional data, is represented by the total integration with a radius r centering on an arbitrary point of the outline, that is, rθ. In the polar coordinates, when r is constant and θ is changed by 0 to 360 degrees, the envelopes 22 and 23 of the inner and outer circumferences are obtained. This total integration method will be described later. These envelope data are stored in the second area of the memory 6 as the second two-dimensional data, and then expanded into a bitmap of XY coordinates. In this case, in order to reduce the amount of calculation, the contour data of the character 21 is rotated by 10 degrees at a radius r around an arbitrary point on the contour line to obtain 36 pieces of data for one round, and these data are logically calculated. Envelope data may be obtained by summing or integrating.

Similarly, the inner frame 24 is also totally integrated around the base point 12 with a radius r, but the outer frame is omitted for simplification. For example, in the case of a character string surrounded by the inner frame 24, the radius r is the shortest among the shortest distance between the frame and the character, the shortest distance between the characters, and the radical within the character, the shortest distance between the sides or the making. Set to half the distance. In FIG. 3, the shaded area indicates the bottom surface of the rubber stamp mold, the dot area indicates the portion serving as the seal stamp, and the white area indicates the slope or gradient area.

The first two-dimensional data and the second two-dimensional data are input to the scanner 8 which deflects the light beam of the light source in the X and Y directions via the rasterizer 7. The scanner 8 includes a light source that irradiates a laser beam having a predetermined wavelength in parallel, and a modulator (shutter) that turns the parallel laser beam on and off based on a signal from the rasterizer 7.
An objective lens for focusing the modulated parallel laser beam on a predetermined focal length, a polygon (regular polygon mirror) for scanning the focused laser beam with a predetermined width in the X direction, and a laser beam reflected by the polygon. Is swept in the Y direction, and the container 9
And a turning mirror for focusing on the liquid surface of the photocurable resin liquid therein.

This polygon is driven to rotate at a constant speed,
On the other hand, the rotating mirror is driven to rotate at a constant angular velocity. Therefore,
A signal is input from the rasterizer 7 in synchronism with the operations of the polygon and the rotary mirror, and the laser beam is deflected in the X and Y directions by each predetermined width. Instead of this polygon, an X turning mirror for reflecting the focused laser beam in the X direction with a predetermined width may be provided. When a polygon is used, it is efficient when forming the bottom surface of the rubber stamp mold, and when an X rotary mirror is used, it is efficient when forming a gradient region, so these may be switched appropriately. .

The sweep scanning laser beam is, as shown in FIG. 4, a liquid surface 32 of the photocurable (photosensitive) resin liquid 31 in the container 9.
Projected on. Immediately below this liquid surface, as shown in FIG. 4, a substrate 33 whose movement in the Z direction is controlled and which supports the cured resin is arranged. The container 9 has an outlet 34 through which the overflowed resin liquid escapes so that the height of the liquid surface becomes constant.
On the other hand, the substrate 33 is controlled up and down so that the distance from the liquid surface is proportional to the Z amount. The photocurable resin is, for example, JP-A-50-101445 and JP-A-1-24552.
45, JP-A-3-206456 and JP-A-4-34.
No. 9462.

Therefore, the second two-dimensional data is the second Z
When scanning the shaded area shown in FIG. 3 at the coordinate point, the light beam from the scanner is turned on to cure and form the bottom area 35 of the rubber stamp. Next, as shown in FIG. 5, the substrate 33 is sequentially moved in the Z direction, that is, downward by Δz, and only the contour two-dimensional data area corresponding to each movement is scanned to obtain the contour of the character gradient area 36. The sections are cured sequentially. The accumulated movement amount is proportional to a predetermined ratio between the second two-dimensional data and the first two-dimensional data. Finally, scanning is performed on the basis of the first two-dimensional data to cure the stamped area of the rubber stamp to form a three-dimensional shell (shell) of the rubber stamp mold, and the three-dimensional shell is peeled from the substrate 33, and the dark room Then, the back side is filled with a photo-curing resin or another epoxy resin, and is placed in a constant temperature room of light such as ultraviolet rays or a high temperature to be completely cured to form a rubber stamp mold.

FIG. 6 is a schematic diagram for explaining the total integration method according to the present invention. In this figure, it is assumed that the square 41 shown by the dotted line is fully integrated with a radius r, for example. A plurality of (partially shown) squares 42 shown by solid lines
Has the same shape as the square 41, and is developed so that each upper right corner is in point contact with a circle 43 having a radius r centered on the upper right corner of the square 41. These solid squares 42 are 3
When integrated (logical sum) over the entire circumference of 60 degrees, an outer envelope including a quarter arc of radius r at each corner is obtained, while 2r is subtracted from the side of the original square 41. A square-shaped inner envelope with sides is obtained. Although an actual font has a complicated shape, generally, when font outline data is represented by F, its envelope data F _ENV is
It is shown as follows.

(Equation 1)

In the rubber stamp type stereolithography system, the first two-dimensional data is sequentially fully integrated with a radius nΔr to calculate their envelopes as contour two-dimensional data, which is input to the scanner via the rasterizer 7. You may. However, n is a positive integer and corresponds to n contour line two-dimensional data. Further, for example, the thin script font of the thin Ming type is already prepared in the Taichung type or the ultra thick Ming type. Therefore, when a character in thin Mincho type is selected, the outline of the character is expanded into the first two-dimensional data, and the outline of bold type (that is, thick or extra thick Mincho type) of the character is changed to the second type. It may be developed as two-dimensional data.

The character outline, that is, the first two-dimensional data is the first
The second two-dimensional data is expanded at the Z coordinate point of
It is developed at the coordinate points, and the intermediate two-dimensional data between the first and second Z coordinate points is linearly interpolated. In this case, at the contour of the character, that is, at an XY coordinate point where the first two-dimensional data exists, a second XY coordinate point at which a line orthogonal to the tangential direction of the same coordinate point and the second two-dimensional data intersect is determined, On the straight line connecting these XY coordinate points, the XY coordinate points on the intermediate Z coordinate point are linearly interpolated.

[0026]

According to the stereolithography system for a rubber stamp mold according to the present invention, a rubber stamp master block having a predetermined slope can be formed with the minimum first two-dimensional data, and the size of the rubber stamp can be increased. It is possible to adjust the depth and gradient of the rubber corresponding to the above, and only the cured resin is taken out, so there is no risk of producing industrial wastewater and photosensitive resin and plate resin to be discarded. Furthermore, many steps and materials required in the conventional rubber stamp molding method can be omitted.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of an embodiment of a rubber stamp mold stereolithography system according to the present invention.

FIG. 2 is an explanatory diagram showing that characters are represented by coordinates.

FIG. 3 is an explanatory diagram showing a rotation integration method for character contours according to the present invention.

FIG. 4 is a cross-sectional view of a container used in this example.

FIG. 5 is an explanatory view showing the formation of the shell of the mother die of the mark.

FIG. 6 is a schematic diagram for explaining a total integration method according to the present invention.

[Explanation of symbols]

 1 computer system (control means) 6 memory 7 rasterizer 8 scanner 9 container 21 first two-dimensional data 22 second two-dimensional data 23 second two-dimensional data 33 substrate

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location G03F 7/20 // B29K 21:00 105: 24

Claims (3)

[Claims] 1. A means for expanding a contour of a character into first two-dimensional data, a means for totally integrating the contour of the character with a radius r to obtain an envelope of the contour as second two-dimensional data, and photocuring. And a container filled with a resinous resin solution, and a light beam controlled based on the first and second two-dimensional data is deflected in X and Y directions to focus on the liquid surface of the photocurable resin solution. A scanner, a substrate that supports the cured resin and can move in the Z direction from immediately below the liquid surface, and a light beam from the scanner is first scanned based on the second two-dimensional data to form a bottom region, Next, while moving the substrate in the Z direction, scanning is performed based on a predetermined ratio between the second two-dimensional data and the first two-dimensional data corresponding to this movement to form a gradient region, and finally, A marking area is formed by scanning based on the first two-dimensional data. Rubber stamp matrix type optical molding system with a control unit. 2. A means for developing a contour of a character into first two-dimensional data, a means for developing a contour of a bold typeface of this character into second two-dimensional data, and a photocurable resin liquid. A container, a scanner for deflecting light rays controlled based on the first and second two-dimensional data in X and Y directions to focus on the liquid surface of the photocurable resin liquid, and a cured resin A substrate that supports and can be moved in the Z direction from immediately below the liquid surface, and a light beam from the scanner is first scanned based on the second two-dimensional data to form a bottom region, and then the substrate is moved in the Z direction. While moving to the second direction, scanning is performed based on a predetermined ratio between the second two-dimensional data and the first two-dimensional data corresponding to this movement to form a gradient region, and finally the first two-dimensional data. And a control means for forming a marked area by scanning based on Example was a rubber stamp mother type optical molding system. 3. The first two-dimensional data is expanded at a first Z coordinate point, the second two-dimensional data is expanded at a second Z coordinate point, and the first and second Z coordinates are defined. The apparatus according to claim 1 or 2, wherein intermediate two-dimensional data between points is linearly interpolated.