JP2001030596A - Print body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a clear print image continuously for a long term by specifying the ratio between the width at an inclining part and the depth at a base part and forming an inflated part at the inclining part. SOLUTION: The ratio between the width at an inclining part and the depth at a base part is set in the range of 25-100:100. The angle α from the end of the base part to the forward end of the character face part is thereby set in the range of 76-45 deg.. Width at the inclining part is set equal to or larger than 3 times of the feed pitch of laser light scanning in order to ensure three or more scans of laser light at the inclining part thus carving an inflated part. Since an inflated part is formed at the inclining part of a print body, a longitudinal/lateral pressing force and a frictional force acting on the character face part can be absorbed and the character face part can be protected against tilting or breaking. The inclining part can also be protected against tilting or breaking because a pressing force acting thereon is scattered and absorbed at the inflated part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to non-porous rubbers such as natural rubber, acrylonitrile-butadiene rubber, styrene-butadiene rubber, silicone rubber, and the like, porous rubber obtained by sponging the rubber, polyolefin, polyurethane and plastic. The present invention relates to a print type of a soft printed body using a soft material that deforms when pressure is applied, such as a porous plastic obtained by forming a resin such as an elastomer into a sponge.

[0002]

2. Description of the Related Art Conventionally, as a printing body composed of a character portion, an inclined portion, and a base portion, Japanese Utility Model Publication No. 54-34651, Japanese Utility Model Application Laid-Open No. 53-62408, and Japanese Patent Application Laid-Open No. 6-234262 are known. Japanese Utility Model Publication No. 54-34651 consists of a narrow angled face, a wide angled slope and a base.
62408 is from page 2, line 20 to page 3, page 1 of the specification.
As described in the eighth line, it is composed of a steep or vertical character surface portion, a wide angle or an inclined portion provided with a step portion, and a base portion.
34262 is composed of a vertical character part, a slope-shaped inclined part, and a base part. And by adopting such a configuration, it is possible to obtain a clear imprint,
The strength of the character portion is improved. However, when a soft material is used as a stamp material, the strength of the configuration of the prior application is insufficient, and the character face portion may fall or break. To compensate for this lack of strength, it is conceivable to widen the angle of the inclined portion. However, the height of the character portion is relatively insufficient, and a clear imprint cannot be obtained. In addition, it is conceivable to reduce the height of the character face portion, but it is not possible to obtain a clear imprint.

[0003]

Therefore, even with a printed body using a soft material, the height of the character face portion is sufficiently secured so that a clear imprint can be obtained, and sufficient strength is obtained. Provided is a print body that can be provided.

[0004]

According to the present invention, there is provided a printed material comprising a character portion, an inclined portion and a base portion, wherein a bulging portion is formed in the inclined portion, using a soft material as a stamping material. Further, the printed body wherein the ratio of the width of the inclined portion to the depth of the base portion is such that the width of the inclined portion: the depth of the base portion = 25 to 100: 100. Further, the ratio of the height of the character portion to the depth of the base portion is determined by calculating the height of the character portion: the depth of the base portion = 5 to 25:
The printed body formed at 100.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The printed body of the present invention can be applied to a printed body prepared by vulcanizing and molding a stamping material such as rubber using a mold having a stamped surface.
In particular, it is suitable for a printing body in which a printing material is directly engraved using laser light. As a stamp material used in the present invention, a raw rubber such as natural rubber, acrylonitrile-butadiene rubber, styrene-butadiene rubber, silicone rubber, ethylene-propylene-diene rubber, and other chemicals are kneaded and formed into a sheet, which is then formed. Vulcanized and cross-linked non-porous rubber sheet, or the raw rubber and other chemicals and a water-soluble substance such as sodium chloride are kneaded and formed into a sheet, which is then vulcanized / cured.
Cross-linked molding, a porous rubber sheet sponged by removing the water-soluble substance, polyethylene, polypropylene,
A resin such as polyurethane / plastic elastomer, other chemicals, and a water-soluble substance such as sodium chloride are kneaded and formed into a sheet, which is heat-formed, and the water-soluble substance is removed to form a sponge-formed porous plastic. A sheet or the like is used. Such a printed body using a soft material that is easily deformed when pressure is applied is mainly used for a seal and an address stamp. Next, a method for forming the character portion, the inclined portion, and the base portion will be described. First, create an artwork that has been converted to data on a computer using graphic software or the like, or create an artwork that will be a manuscript using a phototypesetter or the like and scan it with an image scanner to convert it into data. Create below. Next, the computer divides the data into a character portion (face), an inclined portion (bevel), and a base portion (body), and performs a three-dimensional data analysis process. Since the character portion corresponds to a portion where the text or graphic of the composition exists, the width of the character portion is set to be the same as the width of the character or graphic of the composition. The height of the character portion is the depth of the base portion (the same as the sum of the height of the character portion and the height of the inclined portion).
It is set to 5/00 to 25/100. That is,
The height of the character portion: the depth of the base portion = 5 to 25: 100. In addition, a preferable range is the height of the character portion: the depth of the base portion = 10 to 20: 100. The inclined portion corresponds to a rising portion from the base portion to the character surface portion, and the width of the inclined portion is set to 25/100 to 100/100 of the depth of the base portion. That is, the width of the inclined portion: the depth of the base portion = 25.
~ 100: 100. Thereby, the angle from the base end to the tip of the character portion (see the angle α in FIG. 3).
Is set to be 76 ° to 45 °.
Further, the width of the inclined portion is set to be three times or more the scanning feed pitch of the laser beam. This is because if the scanning feed pitch is three times or more, the laser beam that can be applied to the inclined part can secure three or more scannings, and the bulging part can be engraved. In addition, a bulge portion such as an arc shape which is a part of a circle or an ellipse which can be represented by x2 / a2 + y2 / b2 = 1 or a shape similar thereto is set in the inclined portion. When actually engraving the inclined portion, the height of the inclined portion on each scanning line is adjusted by increasing or decreasing the output of the laser beam for scanning the inclined portion. The base portion corresponds to a blank portion where there are no characters or graphics in the composition, and the depth of the base portion, that is, the depth of the lowest depth by the laser beam is set. Here, the depth of the base portion is the same as the sum of the height of the character portion and the height of the inclined portion. A preferred range for the depth of the base is 0.5 mm to 5.0 mm. Next, a pattern is engraved by irradiating the stamp material with laser light based on the above analysis information. A sheet-shaped printing material cut to an appropriate size is placed on an XY table, and a laser beam is irradiated from a head movable in the XY directions, and the printing material is vertically scanned. The scanning pitch is 30 to 60 μm in a practical range. As the laser beam, a carbon dioxide laser or a YAG laser is preferably used, and the size of the spot is 50 to 20.
The one having about 0 μm is used. When the scanning by the laser beam is completed, a printed body having a rectangular character surface portion and an inclined portion having a bulging portion is obtained. Note that the character portion does not necessarily have to be rectangular, and the angle of the character portion side surface may be formed to be steep. As described above, the bulging portion is formed on the inclined portion of the printed body, so that the vertical and horizontal pressing force and frictional force applied to the character surface portion can be further absorbed, and the character portion can be prevented from falling down and breaking, and also added to the inclined portion itself. Since the bulging portion disperses and absorbs the pressing force, it is possible to prevent the inclined portion from falling or breaking.

[0006]

Embodiments of the present invention will be described below. In this embodiment, acrylonitrile-butadiene rubber (NBR) is kneaded with a filler, a vulcanizing agent, a vulcanization aid, sodium chloride, etc., and formed into a sheet. A 5 mm thick porous rubber sheet removed and sponged is used as a stamping material, and a carbon dioxide laser beam having an output of 30 W and a spot of 100 μm can be irradiated from a head movable in the X and Y directions. Use a laser machine that can scan. First, a computer is used to create a composition, in which parts with characters and figures are represented by black dots, and parts without characters and figures are represented by white dots. , An inclined portion (bevel) and a base portion (body) are subjected to a three-dimensional data analysis process. The width of the face is
Since the portion of the black dot where the character or figure exists corresponds to the character surface portion, the width is set to be the same as the width of the character or figure under the composition, and a command of 0% laser output is set so as not to engrave. Next, 0.60 mm of the outer periphery of the character portion is secured as the inclined portion region, and the height of the character portion is set to 0.15 mm, the height of the inclined portion is set to 0.85 mm, and the width of the inclined portion is set to 0.60 mm. I do. The inclined portion is set in an arc shape that can be represented by x2 + y2 = 1.5 mm2. Next, the width of the inclined portion is divided into 12 every 0.05 mm. The laser output for the first 0.05 mm (first pitch) counted from the character
The height of the character portion is determined.
Set to 5%. Next 0.05mm (2nd pitch)
The subsequent laser output is gradually increased according to the shape of the arc of the inclined portion, and the laser output at the twelfth pitch is set to 100%. Next, since the base portion corresponds to a white dot portion having no characters or graphics, the laser output is set to 100% and the depth of the base portion is set to 1.0 mm. After the end of the computer analysis process, the porous rubber sheet is placed on an XY table of the laser processing machine, and a laser beam is irradiated based on the data obtained by the data analysis process. Here, the laser beam has a characteristic that the output at the center of the spot is strong and the output becomes weaker toward the outside of the spot. Therefore, when the carbon dioxide laser beam of the spot 100μ is scanned at every 50μ pitch, a smooth arc shape is obtained. Can be formed. When the scanning with the laser beam is completed, a porous rubber sheet is obtained in which a cross section is engraved with an inclined portion having a quadrangular character surface portion and an arc-shaped bulging portion, and the required printed body is obtained by punching out this with a punching die. .

[0007]

As described above, the present invention can secure a sufficient height of the character surface portion and does not cause the character surface portion or the inclined portion to fall or break even though the printing member is made of a soft material. It is possible to obtain a printed body capable of having a sufficient strength to the extent that the printed body can be used as a stamp base such as a stamp table for transferring ink or as a penetrated stamp impregnated with ink. The imprint can be continuously obtained for a long period of time.

[0008]

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a partially enlarged sectional view of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Character part 2 Slope part 3 Bulge part 4 Base part 5 Height of character part 6 Height of slope part 7 Width of slope part 8 Depth of base part

Claims (3)

[Claims] 1. A printed body using a soft material as a printing material and comprising a character portion, an inclined portion, and a base portion, wherein a bulging portion is formed in the inclined portion. 2. The ratio of the width of the inclined portion to the depth of the base portion is defined by the following formula: width of the inclined portion: depth of the base portion = 25 to 100: 10.
The printed body according to claim 1, wherein the printed body is formed at 0. 3. The ratio of the height of the character portion to the depth of the base portion is defined as: height of character portion: depth of base portion = 5 to 25:10.
The printed body according to claim 1, wherein the printed body is formed at 0.