JPH05339756A - Production of die cutter - Google Patents

Abstract

PURPOSE:To produce a die cutter having a cutting edge on the outer peripheral surface of a hard metallic cylinder coated with a resist by baking patterns to the surface of this cylinder, then subjecting the cylinder to developing, etching treatment and resist removal and etching the surface. CONSTITUTION:The cylinder made of a high-hardness metal is subjected to a surface treatment, such as grinding and is finished smooth, thereafter, the oil at the time of grinding is removed and the resist is applied thereon. An original plotted with patterns of cuts or folding seams is photographed to form a patterned original plate. The patterns are baked on the outer peripheral surface of the cylinder coated with the resist by this plate. After the resist is developed, the resist is etched by FeCl3, etc., to allow the resist 9 to remain at the front end of the formed blade 8. The pattern parts of the patterned original plate are thus formed of the resist. In succession, the remaining etching after the residual resist is removed then the finish etching is executed to form the cylinder formed with the cutting edge 8A having a sharp front end. The die cutter is thus produced in a short period of time without requiring heat rays.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die cutter manufacturing method, and more particularly to a die cutter manufacturing method in which a cutting edge is directly formed on an outer peripheral surface of a cylinder.

[0002]

2. Description of the Related Art Conventionally, for example, when making a die cutter for cutting and creasing cardboard, sheet-shaped material, etc., first, use a cutting machine such as a milling machine to cut only fine line-shaped blades. Leave uncut. Next, the sharpened tip of the blade is sharpened manually to create a cutting edge.

In the case of the cutting work, leaving only the blade portion,
Because a large area around it must be scraped off,
A high-precision processing technique is required, and a long processing time is required. Further, in order to sharpen the cutting edge, fine processing in a unit of several tens of microns is performed, so that a highly skilled technician needs to perform long-time work.

As a means for solving such inconvenience, there has been proposed a method in which a blade is formed by etching a flat plate, or a die cutter is prepared by attaching an etched flexible flat plate to a cylindrical body ( Japanese Patent Sho 57
-27938 and JP-A-63-102898).

[0005]

However, the method of attaching the flexible flat plate to the cylindrical body again after the flexible flat plate is etched requires a lot of working steps, which requires a long working time. Therefore, there has been a demand for a method for manufacturing a cylindrical die cutter that further shortens the working time.

Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide a method for manufacturing a die cutter capable of manufacturing a cylindrical die cutter in a short time. ..

[0007]

In order to achieve the above object, the present invention provides a first step of forming a photoresist film on the outer peripheral surface of a cylinder, and a step of baking a pattern on the cylinder on which the photoresist film is formed. 2 steps, 3rd step of developing the cylinder with the pattern printed thereon, 4th step of performing main etching with the photoresist film left on the cylinder after development, and removing the photoresist film left on the cylinder. And a sixth step of performing finish etching on the cylinder after removing the photoresist film.

[0008]

According to the present invention, a photoresist is formed on the outer peripheral surface of the cylinder, and the pattern original plate is printed on the cylinder and developed. Further, main etching is performed on the cylinder after development, and the photoresist remains. The residual photoresist is removed, and the second etching, that is, finish etching is performed to complete the cylinder in which the cutting edge is formed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments. FIG. 1 shows a work procedure of the present invention, and FIG. 2 shows a process diagram of a cylinder.

As shown in FIG. 1, as the preparatory work, there are two systems, that is, preparation of a cylinder (steps S1 to S4) and preparation of a photographic original plate (steps S1a to S3a). Preparation of Cylinder The material of the cylinder is preferably iron or stainless steel having high hardness (step S1). The cylinder made of such a material is subjected to surface treatment such as grinding and honing to finish the cylinder surface smoothly (step S2). Next, degreasing is performed to remove oil and the like adhering during grinding (step S3), and photoresist (photosensitive solution) is applied to the cylinder surface (step S4).

Photoresist in step S4
The coating method is as shown in FIG.
Hold the shaft 1a rotatably and rotate it at a constant speed.
Ku. On the other hand, the fo
Cylinder 1 equipped with spray 2 with a built-in resist
While spraying, rotate the spray 2 in the direction of axis 1a.
And evenly apply photoresist to the surface of the cylinder 1.
It Another method for applying a photoresist is shown in FIG.
As shown in (B), apply the ring-shaped spray 3 to the cylinder.
1 and the spray 3 along the outer peripheral surface of the cylinder 1.
Move it up and down and put photoresist on the surface of cylinder 1.
You may apply. The above is the preparation of the cylinder. Preparation of original pattern Prepare a manuscript with a pattern with cuts or folds
(Step S1a), a photo is taken (step S2)
a), prepare a pattern original plate made of film (step
S3a). The above is the preparation of the pattern original plate.Forming the cutting edge on the cylinder The above "cylinder preparation" and "pattern original plate preparation" are completed.
Then, the pattern printing shown in step S5 is performed. This
As a method of pattern baking, as shown in FIG.
Put the pattern original 5 in close contact with the cylinder 1 and use two rubber pieces.
Pressed by rollers 4a and 4b and patterned by light source 6
While irradiating the original plate 5, rotate the cylinder 1 to print.
To do.

Next, development is performed while rotating the cylinder 1 for which pattern printing has been completed in step S5 in a developing tank (not shown) (step S6). After the development is completed, main etching is performed (step S7). As an etching method, as shown in FIG. 4, the shaft 1a of the cylinder 1 is rotatably supported in a container 7 containing an etching solution and spraying of the etching solution is also used. Of course, either one may be used. The following etching conditions are preferable. That is, "corrosion liquid: ferric chloride, rotation speed:
0.4-0.6 m / min, injection pressure: 2.0-3.0
kg / cm (square), liquid temperature: 75 ° C ". When the etching is performed under such etching conditions, as shown by the symbol A in FIG. 1, the resist 9 remains at the tip of the blade 8 formed by the etching, and the pattern portion of the pattern original plate is formed by the resist.

Next, in step S8, the remaining resist is removed, and reetching (finish etching) is further performed (step S9). The etching conditions for this re-etching are preferably the same as the etching conditions in step S7, or slightly high speed, low pressure, and low temperature. When re-etching is performed under such conditions, as shown in FIG.
As indicated by reference numeral B, the cylinder 1A (see FIG. 5) in which the sharp tip 8A is formed is completed.

If the cylinder 1A thus produced is used, as shown in FIG. 6, high-speed continuous punching can be performed from the continuously fed winding sheet 11, and the die can be properly laid out. If so, unnecessary portions between the punching patterns can be minimized. Further, in the case of a roll-shaped die cutter, the blade and the sheet are in line contact with each other, so that the blade pressure can be easily equalized as compared with the surface contact in the case of sheet punching. Furthermore,
Since continuous feeding with tension applied to the winding sheet 11 is possible, it is possible to perform precise registration for determining the punching position.

In this embodiment, the two-step etching of steps S7 and S9 is shown, but three-step or four-step etching may be performed.

[0016]

As described above, according to the present invention, since the cylinder is directly etched to form the cutting edge,
You can create a die cutter in a short time, and you do not need a high level of edge making skill.

[Brief description of drawings]

FIG. 1 is a flow chart showing the steps of the present invention.

FIG. 2 is a diagram showing a method of applying a photosensitive solution in the above process, where (A) is a case where the spray is applied while moving the spray along a rotated cylinder, and (B) is a ring-shaped spray. It is a case where it is applied to the outside and applied while moving the spray.

FIG. 3 is a diagram showing an example of pattern printing in the process.

FIG. 4 is a diagram showing an example of development in the step.

FIG. 5 is a perspective view of a cylinder having a cutting edge formed by the above process.

FIG. 6 is a perspective view when performing continuous punching using the cylinder shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cylinder 1A ... Cylinder with a blade edge formed 2, 3 ... Spray of photosensitive solution 4a, 4b ... Rubber roller 5 ... Pattern original plate 6 ... Light source 7 ... Etching solution container

Claims (1)

[Claims] 1. A first step of forming a photoresist film on an outer peripheral surface of a cylinder, a second step of baking a pattern on the cylinder on which the photoresist film is formed, and a third step of developing the cylinder on which the pattern is baked. Steps, fourth step of performing main etching with the photoresist film left on the cylinder after development, fifth step of removing the photoresist film left on the cylinder, and finishing on the cylinder after the photoresist film removal And a sixth step of performing etching, the method for manufacturing a die cutter.