JP2000190292A - Manufacturing method of sewing blade - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To manufacture a sewing blade with a fine pitch with high accuracy. A photoresist is uniformly laminated on the surface of a metal plate, and the photoresist film is exposed and developed to form a line-shaped resist on a portion corresponding to a sewing blade forming portion on the metal plate surface. After the pattern 13 is formed, the metal plate 10 is etched using the resist pattern 13 as a mask, and when the etching reaches a predetermined depth, the etching is stopped once. After removing the portion corresponding to the uncut portion, the metal plate 10 is etched to a predetermined depth using the resist pattern 14 thus processed as a mask, thereby obtaining a sewing blade having a fine pitch.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a cutting blade used for cutting (pushing) thin paper, a plastic sheet or the like along a predetermined contour, and more particularly, to a method for manufacturing a cutting blade along a cutting line. The present invention relates to a method of manufacturing a sewing machine blade in which cut portions (bladed portions) / uncut portions (bladed portions) are alternately continuously formed at a predetermined pitch.

[0002]

2. Description of the Related Art In the field of printing machines, a magnet roll having a magnet chip laminated on a surface thereof is provided, and a flexible printing original plate containing a ferromagnetic material such as iron, ferrite, cobalt, nickel or the like is mounted on the magnet roll ( A printing machine of the type that performs printing by suction is used. This type of printing machine is characterized in that the printing contents can be easily changed by replacing the flexible printing original plate.

On the other hand, as a printed matter, as shown in FIG. 7, a mount 101 made of paper or a transparent plastic sheet or the like is used.
And the printing paper 102 are laminated with an adhesive therebetween, and after printing is performed on the surface of the laminated sheet 110, only the printing paper 102 on the front surface is cut along the contour 103 of the printed pattern to produce a product, At the time of use, the user places the portion surrounded by the outline 103 of the printing paper 102 on the backing paper 101.
Products that can be peeled off and pasted on personal organizers, calendars, photo albums, slips, file indexes, etc.
Is widespread.

As a manufacturing technique of a product combining such printing and cutting, a flexible die (a ferromagnetic material) having a predetermined pattern of pressing blades on one surface thereof is manufactured, and this flexible die is replaced with the magnet described above. There is a method of attaching (adsorbing) to a roll and performing a cutting process in a printing machine.

[0005] This type of flexible die includes a cutting die in which a pressing blade is continuously formed, and a so-called sewing blade in which cut portions / uncut portions are alternately continued along a cutting line. In addition, as a method for manufacturing these flexible dies, there is a method by machining or etching. In addition, what was manufactured by etching is generally called an etching blade.

An example of a method of manufacturing a sewing blade (etching blade) among flexible dies will be described.

First, a photoresist is uniformly laminated on the surface of a metal plate such as a steel plate, and then the photoresist film is exposed and developed to form a sewing blade forming portion (cut portion) on the metal plate surface. The photoresist is left only in the corresponding portions. Etching of the metal plate is performed using the remaining resist pattern (dashed line shape) as a mask. When the progress of the etching reaches a predetermined height from the back surface of the metal plate, the etching is stopped, and the flexible base and the base protrude from the base. After the ridges are formed, the resist is peeled off and bladed to obtain a flexible die having a sewing machine blade of a predetermined pattern formed on a flexible base.

[0008]

By the way, it has been demanded that the pitch of the cut portion / uncut portion be made finer in the sewing machine blade, but the sewing machine blade by etching can meet such a demand. Can not.

[0009] That is, when a sewing machine blade is manufactured by etching, there is a problem that etching wraps (undercut) in a gap (a gap for forming an uncut portion) of a dashed resist pattern formed on the surface of a metal plate. Since a margin (melting allowance) for avoiding the problem is inevitably needed, the gap size for forming the uncut portion of the resist pattern cannot be reduced. Cut 1.
The limit is 5 mm / uncut 0.7 mm.

[0010] As another method of manufacturing a sewing machine blade, a method of pressing a knurl against a continuous blade or an etching blade (continuous blade) having a machined blade edge, or using a machine tool with a continuous blade having a machined blade edge. There are methods such as dividing at a predetermined pitch, and if these processing methods are adopted,
It is possible to obtain a sewing blade with a fine pitch of 1.5 mm cut / 0.7 mm uncut. However, in these processing methods, since the sewing blade is obtained by post-processing of the continuous blade, the processing of the sewing blade is possible when the cutting line is straight, but when the cutting line has a curved portion, the processing of the sewing blade is performed. Processing is difficult. In addition, the knurling method has a disadvantage that the cutting edge is crushed, so that the cutting performance and accuracy are deteriorated.

The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a method capable of accurately manufacturing a sewing blade having a fine pitch.

[0012]

SUMMARY OF THE INVENTION To achieve the above object, the present invention is a method for producing a sewing machine blade in which cut portions / uncut portions are alternately continuous, wherein a photoresist is formed on the surface of a metal plate. After uniformly laminating and exposing and developing the photoresist film to form a line-shaped resist pattern on a portion corresponding to a sewing machine blade forming portion on the metal plate surface, the line-shaped resist pattern is masked. After the metal plate is etched as described above, when the etching reaches a predetermined depth, the etching is stopped once, and a portion corresponding to the uncut portion of the sewing machine blade in the line-shaped resist pattern is removed. The metal pattern is etched to a predetermined depth using the resist pattern as a mask.

In the method for manufacturing a sewing machine blade according to the present invention, there are two stages of a process of performing etching using a linear resist pattern as a mask and a process of performing etching using a resist pattern obtained by removing a portion corresponding to an uncut portion as a mask. Since the etching process is performed, the etching depth (time) using the resist pattern having the gap for forming the uncut portion as a mask can be reduced, and the margin for the undercut can be reduced as compared with the conventional etching process. Can be. Thereby, the gap size for forming the uncut portion can be reduced, and the pitch between the cut portion and the uncut portion of the sewing machine blade can be reduced.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the manufacturing method of the present invention will be described below with reference to FIGS.

First, in this embodiment, as shown in FIG. 5, the flexible base 1 has a sewing machine blade 2 on one side,
An example in the case of manufacturing a flexible die in which the sewing machine blade 2 is formed corresponding to the contour 103 shown in FIG. 7 will be described. (1) A photomask (film) 11 having an exposure pattern 11a having a shape as shown in FIG. 2 (corresponding to the contour line 103 in FIG. 7) is made in advance. (2) As shown in FIG. 1 (A), a ferromagnetic steel plate (thickness: 0.50 mm) was used as the metal plate 10, and a photoresist was uniformly applied on the surface of the metal plate 10. Then, a photomask 1 is formed on the upper surface of the photoresist film 12.
1 is arranged and positioned (FIG. 1B), and then the photoresist film 12 is developed to form a resist pattern 13 having a shape as shown in FIG. To form (3) As shown in FIG.
Is used as a mask to start etching of the metal plate 10, and when the progress of the etching reaches a predetermined depth (a position shallower than when a normal etching blade is formed), the etching is stopped once (FIG. 1D). ). Note that in this example,
The stop position of the etching is set to a position 0.26 mm from the vertex of the sewing machine blade 2 shown in FIG.

Next, the resist pattern 13 on the surface of the metal plate 10 is processed by using an NC processing machine (not shown) equipped with a tool (knife edge) 20 shown in FIG. As shown in FIGS. 4A and 4B, a portion of the resist pattern 13 corresponding to the portion where the uncut portion of the sewing machine blade is formed is removed to obtain a dashed resist pattern 14. In this removal process, the straight portion of the resist pattern 13 is processed by moving the tool 20 in a direction perpendicular to the straight line, and the arc portion is processed by moving the tool 20 in the direction perpendicular to the arc.

In this example, the size (width) of the removed portion of the resist pattern 13 and its pitch are determined by the removal width W.
= 0.05 mm and the pitch P = 0.5 mm. (4) Dotted resist pattern 1 obtained in the previous step
Using the mask 4 as a mask, the etching of the metal plate 10 is started again, and when the progress of the etching reaches a predetermined height (0.13 mm in this example) from the back surface of the metal plate 10, the etching is finished. (FIG. 1E). By this etching process, the flexible base 1 is formed, and the projections 21 having a trapezoidal cross section are formed on the flexible base 1 along the cutting line. (5) After removing the resist pattern 14 (FIG. 1)
(F)), using the above-mentioned NC processing machine (with the tool 20 mounted), sharpening (blading) the edge 21 of the protrusions 21 having a trapezoidal cross section arranged on the flexible base 1.

By the above processing, as shown in FIG. 5, the blade height H = 0.47 mm and the thickness T = flexible base 1
In the case of 0.13mm flexible die,
The pitch of the uncut part is, for example, cut M1 = 0.3 m
A fine sewing blade 2 with m / uncut M2 = 0.2 mm can be obtained.

The photoresist, etchant, resist remover and the like used in the manufacturing method of the present invention are not particularly limited, and any one may be used as long as it is generally used in the production of an etching blade. Can be.

In the above embodiment, the NC processing machine equipped with the tool 20 is used to process the linear resist pattern 13 after the first-stage etching is stopped. The present invention is not limited to this, and other mechanical processing generally used in processing of a flexible die, processing by a photolithography method, or the like can be applied. In addition, as a tool used when processing the line-shaped resist pattern 13, FIG.
In addition to the shape shown in FIG. 6A, any other shape such as a tool 20 'having the shape shown in FIG. 6B can be used.

In the above-described embodiment, the shape of the processed portion of the linear resist pattern 13 is a linear slit. However, the shape of the processed portion is not limited to this. The present invention can be implemented with any shape.

In the above embodiment, an example of a sewing machine blade having a rectangular (square radius) cutting line has been described. However, the present invention is not limited to this, and the present invention is not limited thereto. It can also be applied to the production of various sewing blades for cutting complicated shapes such as patterns, flower patterns, letters, and the like.

[0023]

As described above, according to the manufacturing method of the present invention, a two-stage etching process is performed, and in the first-stage etching process, the metal is etched using the linear resist pattern as a mask. Most of the unnecessary portion of the plate is removed, and in the second etching process, the uncut portion is formed by performing etching using the resist pattern from which the portion corresponding to the uncut portion of the etching blade has been removed as a mask. The pitch of the cut / uncut portions of the sewing blade can be made smaller than in the past. Incidentally, in the conventional etching method, the cut 1.5
Whereas the pitch of about 0.7 mm / uncut was the limit, the adoption of the manufacturing method of the present invention can improve the pitch to 0.3 mm / uncut 0.2 mm.

In addition, in the manufacturing method of the present invention, since all of the blade processing is performed by etching without performing post-processing by a knurl or the like, a fine sewing blade excellent in both blade precision and cutting ability can be obtained. it can. In addition, there is an advantage that even a cutting line having a complicated shape obtained by combining a curve and a straight line can be easily handled.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention.

FIG. 2 is a plan view schematically showing a photomask used in the embodiment of the present invention.

FIG. 3 is a plan view schematically showing a resist pattern formed in the embodiment of the present invention.

FIG. 4 is a perspective view of a principal part schematically showing a resist pattern formed in the embodiment of the present invention.

FIG. 5 is a perspective view of a main part schematically showing a sewing machine blade obtained in the embodiment of the present invention.

FIG. 6 is a diagram showing an example of a tool used in the embodiment of the present invention.

FIG. 7 is a front view showing an example of a sticker with a mount.

[Explanation of symbols]

 Reference Signs List 1 flexible base 2 sewing machine blade 21 trapezoidal projection 10 metal plate (steel plate) 11 photomask 12 photoresist film 13 resist pattern (line shape) 14 resist pattern (dashed line shape)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takayasu Yoshioka 3-39, Kusune-cho, Yao-shi, Osaka F-term in Tsukadani Knife Manufacturing Co., Ltd. 3C060 AA01 AA04 BA08 BB18

Claims (1)

[Claims] 1. A method of manufacturing a sewing machine blade in which cut portions / uncut portions are alternately continuous, wherein a photoresist is uniformly laminated on a surface of a metal plate, and the photoresist film is exposed and developed. Then, after forming a line-shaped resist pattern on a portion corresponding to the sewing machine blade forming portion on the metal plate surface, the metal plate was etched using the line-shaped resist pattern as a mask, and the etching reached a predetermined depth. At this point, the etching is stopped once, the portion corresponding to the uncut portion of the sewing machine blade in the line-shaped resist pattern is removed, and then the metal plate is etched to a predetermined depth using the resist pattern after the processing as a mask. Characteristic method of manufacturing a sewing machine blade.