JPS6235479B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a metal form design template used for input form design for an optical character reading device.

Conventionally, metal form design templates have been manufactured by a shearing method, a wire cutting method, or the like.

The shearing method uses an expensive mold, but since it is a template used for designing input forms for optical character reading devices, demand for it is limited and production is limited, resulting in high costs. It is also possible to process scales, letters, etc. at the same time as drilling, but this increases the complexity of the mold and increases the cost. Furthermore, since burrs are produced during processing, post-processing to remove burrs is required.

Unlike the shearing method, the wire cutting method does not use expensive molds, but it has the disadvantage that it is not possible to process scales and letters at the same time as drilling holes.

There are also form design templates made of synthetic resin instead of metal. However, in the case of input forms for optical character reading devices made of synthetic resin, the spacing between the reading frames is very narrow, and since the template is traced with a writing instrument, the template cannot be made very thick. If provided, it would not be strong enough to withstand the force of tracing with a writing instrument. Therefore, in the case of synthetic resin, a through-reading section frame is provided every other time, and then a reading frame section is printed between the through-reading section frames. To draw a continuous reading frame using this synthetic resin template, first trace and write the through-reading frame with a writing instrument, and then fill the drawn reading frame with the reading frame printed on the template. It is very troublesome to have to overlap the marks and trace the through-reading part frame again with a writing instrument.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a metal form design template that eliminates the above-mentioned drawbacks and can be manufactured in one step at low cost.

That is, the present invention provides two original plates each having a pattern for half-etching scales and characters, and a pattern for through-holes in the shape of a reading frame and line marks, respectively. Align the patterns so that they overlap and join them at their edges, insert a metal plate with a photoresist film on both sides between the two original plates, and expose it from both the front and back sides. The gist of this is to perform an etching process.

Hereinafter, the manufacturing method of the present invention will be explained according to the drawings.

1 and 2 to 4 schematically show the etching process. The metal plate 1 is degreased, and a photosensitive liquid is applied to both surfaces and dried to form a photosensitive film 3.

On the other hand, in order to create a resist image with a pattern of holes to be processed, an original plate called a photomask is required. )
A cut is made with a cutter and the light-shielding film is peeled off to create a document with the desired pattern, and the document is converted to film to create an original plate. As shown in Figure 2, prepare two original plates and overlap them to form a
The sides are fixed with an adhesive 5, and the metal plate 1 is inserted between the two original plates 7 and 9, brought into close contact with each other, and exposed to light from both sides. However, in this case, one original plate 7 is provided with a pattern 11 of characters and scales.
Next, when the unexposed photoresist film is dissolved using a developer, a photoresist image having a desired pattern of holes is formed on the metal plate as shown in FIG. Thereafter, the photoresist film is dried again to completely harden it, and the areas where the photoresist film is not present are etched using an etching solution for processing. In this case, as shown in FIG. 4, the reading section frame portion is etched from both sides to form through holes 13, but the characters and scale portions are etched from only one side to form holes 15 of a certain depth. Furthermore, the photoresist film is removed to create a template for designing metal forms.

Incidentally, letters, scales, etc. may be inked to make them easier to see.

According to the present invention, there is an advantage that the processing of through holes such as the reading frame and line marks, and the processing of scales and characters can be performed at the same time, and there is no need for post-processing because burrs are not created unlike shearing processing.

Further, in the present invention, two original plates are aligned in advance and joined at their edges, so that the metal plate and the original plate can be easily aligned.

Next, the present invention will be explained in more detail with reference to Examples.

Example A stainless steel plate with a thickness of 0.3 mm was used as the material for the template.

(1) First, a stainless steel plate is immersed in a 40% by weight aqueous caustic soda solution heated to 50°C for 5 minutes to dissolve and remove dirt and oils on the surface.

(2) Immerse the stainless steel plate treated in (1) in casein/ammonium dichromate photosensitive liquid C-90 (manufactured by Tokyo Ohka Kogyo Co., Ltd.) for 5 to 10 seconds at room temperature of 25°C. A photoresist film with a thickness of about 6 μm is uniformly formed on the entire surface of the stainless steel plate by gently pulling it up so as not to cause any damage.

(3) Next, let the stainless steel plate stand at room temperature for 5 minutes, then put it in an oven at 80°C and dry it for 20 minutes.

(4) Remove the stainless steel plate from the oven, leave it in the air for 5 minutes to cool it, insert it between two original plates, stick them together, and expose the stainless steel plate from both the front and back for 120 seconds to 180 seconds using a xenon lamp. do.

(5) The exposed areas will harden and become insoluble in water or hot water, so immerse in water or warm water at 40°C for 20 to 30 seconds to dissolve and remove the unexposed areas of the photosensitive film.

(6) After drying, heat treatment is performed at 200°C to 300°C for 4 minutes to completely cure the exposed area.

(7) Etch the stainless steel plate by immersing it in a 50° Baume ferric chloride solution at 50°C for 10 minutes.

(8) A template is prepared by immersing it in a 40% by weight aqueous solution of sodium hydroxide at 50°C to dissolve and remove the hardened photosensitive film, and then drying it.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing the outline of the etching process, Figure 2 is a cross-sectional view showing a metal plate with a photoresist film inserted between two original plates and exposed to light, and Figure 3 is FIG. 4 is a sectional view showing the state of the metal plate after development, and FIG. 4 is a sectional view showing the state of the metal plate after etching is completed. 1...Metal plate, 3...Photosensitive film, 5...Adhesive,
7,9...Original version.

Claims (1)

[Claims] 1. Two original plates with patterns for half-etching scales and characters, and patterns for through-holes in the shape of reading frame and line marks, etc.
The through-hole patterns formed on each original plate are aligned so that they overlap and are joined at their edges, and a metal plate with photoresist film formed on both sides is inserted between the two original plates. A method for manufacturing a template for designing a metal form, characterized in that the template is exposed to light from both the front and back sides and subjected to etching processing.