JPS60221581A - Dial for timepiece and its production - Google Patents

Abstract

PURPOSE:To reduce cost by forming a photosensitive resin layer having a specific thickness formed with ruggedness such as a character, etc. by photopolymn. on a metallic base plate and forming further a thin metallized layer having a prescribed thickness on the surface thereof. CONSTITUTION:A resin monomer for casting is cast between a metallic master and glass 13 and is cured to manufacture a resin mold 10. A transparent film 6 is placed on a film mask 5 and a spacer 7 is set thereon. A photosensitive resin monomer 8 is dropped by a suitable quantity. The resin mold 10 formed with the desired surface pattern and character shape is then placed thereon to sandwich the monomer 8 between said mold and the film 6 in a vacuum. UV is further irradiated from the mask 5 side and the monomer is successively subjected to electroless Ni-P alloy plating, under-plating and finish plating. The integration of the process for production is made possible by the above-mentioned method and since the method adapts itself to diversification of design, a considerable cost reduction is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a timepiece dial and a method for manufacturing a timepiece dial.

[Prior art]

Traditional watch dials have a metal-based structure.

The problems with the above-mentioned metal base structure watch dial will be explained in detail.

First of all, the problem from the perspective of cost reduction is that it is not possible to save labor through mechanization and automation.

The reason for this is that watch dials are produced in small quantities with a wide variety.
Moreover, processing equipment differs depending on the type of surface finish, and combining them to automate and create a production line would require enormous development costs and capital investment, which would be impossible in reality.

Second, delivery times can be shortened. As consumer preferences have diversified, designs have become more diverse, and it has become important to be able to quickly supply a wide variety of products in small quantities. Delivery times can be shortened if costs are not taken into consideration, but when cost balance is considered, there is currently a limit to shortening delivery times.

Sixth, the dial is the face of a watch, and with the diversification of consumer tastes, how to provide dials with a variety of designs has become an important issue. Examples include composite patterns in which two types of patterns are added to the same substrate, three-dimensional patterns such as pictures and designs, and the like. As designs become more complex in this way, it becomes a factor in increasing costs, and it becomes important to have a variety of dial designs at a low price.

Regarding the above issues, the structure of the conventional metal base dial,
I will explain in more detail when explaining how to make it.

The structure of conventional metal base dials is: printed dials that are completed by surface finishing, painting, and printing on the metal base 1, and printed dials that are completed by surface finishing, painting, and printing on the metal base 1. Letters are formed on a metal base 1 that has been surface-finished and painted, with the opening parts such as letters and marks embedded in it, and the letters are formed by the coining method using a mold, and the protruding letter parts are made with diamonds. A typical example is a coining dial in which the cut letters and the base plate 1 are integrated.

Next, I will explain how to make it.

First of all, there are two ways to make printed dials. The pattern on the base surface of the dial is a hairline pattern,
There are two types of products: Patola-finished products, which are represented by radial patterns, and die-cut products, which are stamped by surface stamping.

First, the former method will be explained according to the process order.

Punch out the outer shape and center hole in an NS (nickel silver) board 1 with a thickness of 0.5 mm (Fig. 1-(S)).Next, attach the fixed feet 2 to the base plate 1 (Fig. 1). −■).

There are currently two methods of attaching feet.

First, I will explain how to attach it with silver solder.

The leg 2 has a structure in which a copper pipe is filled with silver solder. First, the copper pipe part of the leg 2 is temporarily attached to the base plate by resistance welding. Next 800. C. This is a method in which the copper pipe is passed through a furnace for 5 minutes to melt the silver solder in the copper pipe and completely fix the legs 2 to the base plate. The feature of this method is that there is almost no deformation of the surface of the base plate 1 in the part where the feet are attached, but the temperature condition when melting the silver solder is high (800C).
Therefore, the material of the base plate 1 becomes dull. For example, if the material of the base plate 1 is BS (brass), the hardness before passing through the furnace was 180IIV on the Pincus hardness, but after passing through the furnace, the material becomes dull. aoavK, which limits the base thickness, and in the case of BS it is 60. /1001 or less is practically impossible.

In addition, high-temperature treatment at 800C requires large equipment ((
turn into.

Another method is to attach the legs using resistance welding. This is a method in which the legs 2 are made of pure copper and have a pointed tip, and the flow is traced between the base holder 1 and the legs 2, and the legs are worn while applying pressure. In this method, since the tip of the leg 2 has a high resistance, the tip of the leg 2 is locally heated and joined.

The feature of this method is that heat is generated only at the tips of the legs 2, and since it is localized mouth heat, the strength of the base plate 1 will not be weakened by attaching the legs 2.

However, the disadvantage is that the foot attachment sometimes causes deformation (foot deco) on the surface of the base plate 1 where the foot is attached because pressure is applied to increase the fixing force between the base plate 1 and the foot 2. . In other words, a 10 to 20 μm bulge appears on the opposite side of the base plate 1 to which the legs 2 are attached, which is a problem in terms of appearance, and requires a surface preparation process to remove the burr.

Next, the surface of the rear base plate for the feet is polished using a separate cloth to create a mirror finish.

If even the slightest scratch remains in this separate cloth polishing process, it will result in a poor appearance during the later polishing process.
This is an advanced work that requires a high degree of skill.

Furthermore, if there are material defects (impurities, inclusions*) in the material of the base plate 1, it will not be possible to obtain a mirror surface, so a special tempered material with less impurities is required.

Next, a pattern is created using a special processing machine. (No. 11 ¥1-0) There are currently 10 types of Patora patterns, and representative patterns include radial patterns and hairline patterns, and each pattern requires a dedicated processing machine.

Next, honing is performed using special equipment.

This honing process is also an extensive process in determining the texture of the dial, and depending on the type of abrasive grain, grain diameter, and honing time, it is possible to create a surface state with different textures, and in reality, φ
Honing of Saimoe is being carried out.

Next, apply plating. (Subplate plating: N1 plating, finishing plating: Ag plating, Au plating, etc.) Next, lacquer is sprayed in Paint 5, and printing completes the dial of the printed tag (Fig. 1-■ ).

Next, the process order of the latter method will be explained.

First, the raw material plate is pressed out to remove the raw material.

Next, an annealing treatment is performed. This is a necessary step in order to facilitate the next process.

Next, the base plate 1 is patterned by pressing.

Pressing is a process in which a pattern is applied to the surface of a mold, and the pattern is cold pressed (100 tons) to transfer the patterned surface of the mold onto the base plate. This surface-pressed Karoe weighs 100 tons.
It is a very large and heavily equipped device that processes small-sized dials because of its frictionless design.

Next, a center protrusion and an outer diameter part are formed on the base plate 1 by pressing.Next, the feet are attached. Attach the legs using silver wax.

In this case, it is not possible to use resistance welding. The reason for this is that the base plate already has a pattern on its surface, so when it is attached using resistance welding,
This is because it is impossible to remove the burrs that occur on the surface of the base plate on which the legs 2 are rested.

Next, the printed Taigu dial is completed by plating, car trim 6, and printing.

Next, how to make a typesetting dial board will be explained.

First, add characters 4, marks, windows, and other additional parts to the printed dial board made as described above.

(Figure 3). The character 4, which is marked, has two feet, and holes corresponding to the feet are made on the printed dial.

In the case of windows, holes are made to correspond to the windows in which the plants will be planted.

Next, the printed letters 4, marks, and windows are caulked and fixed to the dial base plate, and adhesive is poured into the caulked parts to reinforce them, and the typesetting dial plate is completed (Figure 6).

This typesetting dial board is mainly for the character part, and the number of characters 4 is often planted in 11 to 12 places.
Therefore, the cost of additional parts increases.

Furthermore, the planting process is difficult to automate and is done manually, making it a very labor-intensive process.

In addition, the planting work is a very detailed work that requires a lot of nerves and skill, which is the biggest problem with typesetting dials in terms of cost and work inscription. .

Next, I will explain how to make a coining dial.0 First, attach the feet to the base plate 1 using the same process as the printing dial.
We perform pattern finishing, plating, and painting finishing. Next, the characters are made to protrude using a press die using the Kongjung method (Fig. 2-■).

Next, the protruding character part is diamond-cut to create the character shape (Figure 2-○).

Next, the diamond-cut surface is plated and printed to complete a coining dial in which the dial base plate and letters are integrated (Fig. 2-■).

Compared to typesetting dials, this coining dial is a streamlined method that does not require a typesetting process, which is the biggest problem with typesetting dials.

The problem with this coining dial is that first of all, a mold is used to form the shape of the literature department, and the manufacturing cost of the mold used for it is high, so if the lot size is large, the depreciation cost of the mold will be low. However, if the lot size is small, the depreciation cost of the mold increases, making it disadvantageous in terms of cost, so it is not suitable for processing small lot sizes.

Second, there are restrictions on the processing of character shapes.

This is because the dial page and the character part are constructed as one unit, so complex character shapes cannot be diamond-cut.

〔the purpose〕

The present invention is intended to solve the above-mentioned problems, and its objectives are, firstly, to reduce the cost of watch dials, secondly, to shorten the manufacturing delivery time, and sixthly, to reduce the cost of watch dials. To provide a dial for a watch that makes it possible to expand the variety of designs of the dial.

〔overview〕

The watch dial of the present invention includes surface patterns, letters, windows, symbols,
The photosensitive resin substrate is patterned with patterns and marks, and a thin layer is formed on the next surface! ＃The enemy is a photosensitive resin layer with surface patterns, letters, windows, symbols, patterns, and marks formed on the metal base plate, and a thin metalized layer on the surface. Features.

The watch dial of the present invention refers to any display member such as a cutout member.

[Example 1] This will be explained based on FIG.

First, the dial outer diameter circle i11! Prepare a mask 5 in which the part corresponding to l is white and the part corresponding to the outside is black,
A transparent PET film 6 is placed on top of that, and a spacer 7 with the same thickness as the dial is set on the outer periphery.
Asahi Kasei JxFp7o near the center of PEU film 6
o Drop an appropriate amount of photosensitive resin monomer 8 (Fig. 4-■
).

The dropped photosensitive resin 8 is made to contain no air. If possible, it is preferable to perform vacuum degassing after pouring.

Next, C
Place the R-39 resin mold 10, and place the PET film and resin mold 1.
Sandwich the photosensitive resin monomer 8 between 0 and 0. Air should not be allowed to enter between the IgPET film 6 and the resin mold 10. In order to ensure that air does not enter, it is desirable to set the resin mold 10 in a vacuum. The degree of vacuum may be about 10-''TORR.

Next, apply ultraviolet rays (UV) of 650 to 400 nm from the mask side.
) to harden the photosensitive resin layer 8 (Fig. 4-■).

The conditions for irradiating ultraviolet rays are 150 mW intensity UV and 5'
Hardens in a short time within non-stick areas.

The photosensitive resin used above has good mold releasability from the resin mold 10 used, good adhesion to the metallization process that is processed in the subsequent process, and the photosensitive resin is chemically bonded to the paint solvent in the light process. The selection can be made taking into consideration the fact that it will not be violated.

The material of the mold 10 is such that the resin mold 10 can be easily opened (for example, transfer from a master by casting or thermal polymerization is applicable. The above CR-59 resin mold was made by this method. The material is selected in consideration of the fact that it does not react with the photosensitive resin 8 used, and that it has good mold releasability from the cured photosensitive resin 9. 650 when curing the photosensitive resin 8 through the resin mold 10 using UV as shown in Example 2 below.
It is required that the transmittance of ultraviolet rays with wavelengths around ~400 nm be good.

The method for producing the resin 10 will be described.

First, make a master out of metal. This master only needs to be made in the same way as the desired watch dial, and can be made in the same process as the current dial, so the manufacturing cost is very low (Fig. 7-■).

Next, a casting resin monomer (CR-39) is poured between the metal master and the glass 15, and heat is applied to harden the casting resin monomer. (Fig. 7-■) After curing, the metal master and the glass plate are removed to form a resin m10. (Fig. 7~■) Since the metal master can be used repeatedly, 1
It is possible to manufacture a large number of resin molds 10 from one master. 1 is the dial plate, -s tai, 4 is the typesetting character,
7 is a spacer.

In addition to CR-59, a casting type acrylic resin and a transparent type casting/recon rubber circuit mold 10 can be used as the 14-gold mold 1D of the watch dial of the present invention.

Next, after curing, the dial plate made of photosensitive resin is peeled off from the resin mold 10, and the uncured photosensitive resin monomer 8 is washed off with a special developer (FIG. 4-■). The developer is preferably sodium borate.

Next, as a method for metallizing the photosensitive resin surface onto which the resin mold surface has been transferred, a wet plating method and a dry plating method can be adopted.

As a wet plating method, electroless N1 plating is optimal in terms of the appearance quality of the plating layer and the adhesion between the plating layer and the photosensitive resin layer.

First, pretreatment is performed before applying plating. The pretreatment is
Hct acidic stannous chloride solution (concentration = 1%) was immersed for 1 minute, and after washing with water, it was immersed in a diluted baladium solution (concentration = 5 to 10%).
H), immersed in water for 1 minute, washed with water, and then dried. After the above pretreatment, electroless Ni-P alloy plating (Kanigen Co., Ltd.: g 8680) was applied. Plating conditions were 50C and 1 minute. Under these conditions, the thickness of the Ni-P layer (P content: 8 Wt%) is approximately 500X. The thinner it is, the better the adhesion to the photosensitive resin. Electrolytic plating is possible and the thickness range with good adhesion is preferably 400 to 600λ. Above electroless N
In addition to i-P alloy plating, Ni-B alloy plating can also be applied.

Next, sub-electrolytic Ni-based plating is performed. The purpose of the sub-electrolytic Ni-based plating is that it is necessary for the next finishing electrolytic plating of Ag, Au', etc.

In other words, direct finish plating on electroless Ni-based plating has a problem with the coverage of the finish plating, and plating cannot be performed.The reason for this is that electroless N
i-P alloy plating contains P, so electrolytic N1
This is because the electrical resistance value is 10 times higher than that of plating, and the thickness is very thin.
This is noticeable in the case of plating.

In addition, electrolytic plating must be difficult to thermally diffuse with the finish plating.For example, if the finish plating is Ag plating, if the under plating is Cu plating, Cu will be mixed into the Ag. It diffuses and discolors the Ag plating.

For electrolytic Ni-based plating, Watt bath is preferable from the viewpoint of plating throwing power.

The composition and conditions of electrolytic Ni plating are as follows.

Nickel sulfate hydrate 225 t/Nickel chloride hexahydrate 4017/Boric acid 25P/Yonezawa agent 51/L PH4,5 Liquid temperature 50C Current density IA/di The thickness of electrolytic Ni-based plating under the above conditions is Ni-based electroless. Plating is performed so that the total thickness including the plating layer is in the range of 1500K to 3500X. The upper limit of 5sooX is limited by the plating adhesion between the photosensitive resin and the metal thin layer, and the lower limit of 1500X is limited by the plating coverage of the final plating.

Although this is the case of the above-mentioned 1T/''i electrolytic Ni plating, monometallic plating such as C'o plating and Fe plating and alloy plating can also be employed as the underlying plating.

Examples of alloy plating include NiCo plating, Fe-N1 plating, and Ni-Pd plating.

Next, finish plating is performed. Types of finishing plating for the dial include Ag plating, Au plating, black N1 plating, etc., and the plating thickness is preferably about 500X as long as the color tone can be achieved (Fig. 4-■) The plating layer 11 is made of electroless Ni. Five plating layers are shown: a plating layer, a base N1 plating layer, and a final plating layer.

Next, the watch dial of the present invention is completed by painting and printing (Fig. 4-■). FIG. 6 is a plan view.

[Example 2] This will be explained based on FIG.

First, a base plate 1 is made by removing raw material from a steel material having a thickness of 20/100 mm (2-■).

The material used for the base plate 1 is limited to nickel silver and brass in conventional dial plates, and a specially tempered material with few material defects is used. Since the base material 1 for the dial plate is not limited in terms of material and general materials can be used, the material cost of the base plate 1 can be drastically reduced.

For example, compared to nickel silver used in conventional methods, steel material costs less than 1/4 of the raw material cost.

Next, the fixed legs 2 are attached to the base plate 4 by resistance welding. During resistance welding, deformation occurs on the surface of the base plate where the foot is attached (the deformation is 1/10LI to 2/100), but photosensitive resin No. 9 is formed on the surface of the base plate in the next process. Therefore, if the thickness of the photosensitive resin is 100 mm or more, there will be no problem. Therefore, when attaching a conventional watch dial by resistance welding, it is necessary to apply menstrual blood to the bulges formed on the base plate 1 after bathing to flatten them, but the watch dial of the present invention requires There is no need for this on the dial.

Next, apply adhesive to the surface of the base plate.

The purpose of this adhesive is to improve the adhesion between the base plate and the photosensitive resin cured layer that will be formed on the surface of the base plate in the next step.

The adhesive to be applied is 2 W t% 1 - methacryloxypropyltrimethoxysilane, 2 wt % tetramethoxy 7
A solution of iwt% tetraoctyl titanium in isofurovir alcohol was used for 7 days.

The above solution was spray applied and heated at 150°C for 1 hour to form a film. The adhesive layer formed into a film is firmly fixed to the surface of the base plate. In order to ensure complete adhesion, it is best to roughen the surface of the base plate, such as with a matte finish. The thickness of the adhesive layer is approximately 500X.

The function of the adhesive component is to bond the r-methacrylate adhesive and the photosensitive resin. In other words, r-methacryloxypropyltrimethoxysilane is a hydrolyzable silica compound having an ethylenically unsaturated substituent, and the unsaturated group photoreacts with the photosensitive monomer to chemically bond and obtain strong adhesive strength. . In addition to r-methacryloxypropyltrimethoxysilane, vinyltriethoxysilane (CH220H-8l (QC2H1l)
Hydrolyzable compounds having ethylenically unsaturated substituents such as s) will achieve this purpose.

Next, tetramethoxysilane has the function of fixing the metal base plate and the adhesive. In addition to tetramethoxysilane, tetraalcosilane compounds such as tetraethoxysilane and tetrabentaogynesilane are effective for this purpose.

Next, the function of tetraoctyloxytitanium is added as a catalyst for hydrolyzing compounds having ethylenically unsaturated substituents and tetraalcosilane compounds. For this purpose, in addition to tetraoctyloxytitanium, tetraalkoxy7 titanium compounds such as tetrabutoxytitanium and tetrahexyloxytitanium, acidic water such as HCl, acidic water and organic molar solvents such as alcohols, ketones, and esters are used. A mixture of these is effective.

Next, on the base plate 1 coated with adhesive,
Drop an appropriate amount of 700 photosensitive resin monomer 8 (5th
Figure -■).

The dropped photosensitive resin monomer 8 should not contain any air. If possible, it is desirable to perform vacuum degassing after the lower part. The degree of vacuum should be about 10" 2 TORR ().

Next, the desired surface pattern and concave character shape are flowing.
An R-59 resin mold 10 is placed, and a photosensitive resin monomer 8 is sandwiched between the base plate 1 and the resin mold 10 to a thickness of 10/100 mm. At this time, vacuum defoaming is performed as described above so that air does not enter between the base plate 1 and the resin mold 10.

Next, ultraviolet rays (UV) having a wavelength of 350 to 400 nm are irradiated from the upper surface of the resin mold 10 to harden the photosensitive resin monomer. The conditions for irradiating ultraviolet rays are U with an intensity of 150 mW.
It cures in a very short time within 5 at V (Fig. 5-■).

When the photosensitive resin is cured, the photosensitive resin and adhesive are chemically bonded, and the photosensitive resin layer is bonded to the base plate via the adhesive. The photosensitive resin 8 used above is the same as in Example 1. Those that have the performance described are selected.

The material of the resin mold 10 is such that the photosensitive resin 8 is passed through the resin mold 10.
Resin mold 1 used in Example 1 has good transmittance for ultraviolet rays with wavelengths around 650 to 400 nm.
Glassed by zero need.

Resin i! of this example! In addition to CR-39, examples of resins that can be used as 1io include cast-type acrylic resin, transparent type silicone rubber resin, and the like.

Next, when the pace plate is removed from the resin mold 10 after curing, the photosensitive resin 9 is formed on the base plate 1, and the resin surface is covered with the resin mold 1.
The same mask as the one on which the pattern surface of 0 was transferred is reproduced (Fig. 5-■).

The thickness of the photosensitive resin layer 9 formed on the base plate 1 is 10/
100 throats.

The thickness of the photosensitive resin layer 9 has a great influence on the metallized thin layer applied to the surface in a subsequent step.

That is, if the thickness of the photosensitive resin layer 9 is less than 8/10, the thin metal layer will partially bulge. Furthermore, even if the product is good at the initial stage, problems arise in terms of durability and quality. For example, when a thermal shock of 100 C or more is applied, the thin metal layer partially bulges. That's 8/1
If the thickness is 0.00 mm or more, the metal layer will not develop blisters and will be extremely sensitive to heat shocks of 150° C. or less.

The results of the blistering incidence of the photosensitive resin layer and the thin metal layer are shown below.

The specifications of the sample are that the thickness without electroless Ni plating is 500λ,
The thickness of the electrolytic Ni plating layer on the underlay is 2.0OOX.

The thickness of the finishing Ag plating is SOO;,, Painted! -The thickness of the skin is 500X.

In the above table, the finished product indicates the rate of occurrence of blistering when the dial is completed. Thermal shock indicates the rate of blistering when a finished dial with no blisters is tested at 150 degrees for 60 minutes.

Next, the photosensitive resin with the pattern transferred to the base plate is exposed to ultraviolet light (5
50 to 400 nm) to sufficiently cure the photosensitive resin 9.

Next, the surface of the photosensitive resin onto which the pattern has been transferred is subjected to a metallization treatment. First, a pretreatment is performed to provide catalyst nuclei to enhance electroless N1 plating. As the pretreatment liquid, a pretreatment liquid manufactured by Hitachi Chemical Co., Ltd. is used. First, it is immersed in hydrochloric acid (20% bath solution) for 2 minutes, then immersed in a sensitizer (MS-101B) for 5 minutes, washed with water, and then immersed in an adhesion promoter (ADP-201) for 5 minutes and washed with water.

After the above treatment, electroless-P alloy plating (S-
680) and tighten. Plating conditions are 500,1
Minutes. Ni-P layer under these conditions (P content/F amount wt%)
The thickness is approximately 500X.

Next, electrolytic Ni plating is performed. Are the plating solution composition and conditions implemented? Use the one shown in 111, and the plating thickness is 200
Add 0X.

Next, apply the final Ag plating. The thickness of the Ag plating is 5ooX (Figure 5 - ■).

It consists of six plating layers: 11 plating layers: an electroless Ni plating layer, an underlaying Nl plating layer, and a finishing Ag plating layer.

Next, a transparent protective layer 12 is formed on the final plating surface. 2% wt% tetramethoxysilane, IWt titanium tetraoctyl titanium isodulovir alcohol solution is spray applied and heated for 15 minutes to a thickness of 500~5.
A transparent protective layer of 00X is formed. The coating film mentioned above has a very thin film thickness, so forming the coating film does not impair the appearance quality, and since the coating film is very dense, it also has the function of preventing discoloration of the final plating layer. .

The above component, tetramethoxy 7-rane, is a hydrolyzable type organosilicon compound, and a dense film is formed by hydrolysis. Tetraoctyl titanium is added as a catalyst to hydrolyze tetramethquine silane.

Hydrolyzable organic silicon compounds other than tetramethoxysilane have similar effects.

The purpose of this protective layer is to prevent chemical discoloration of the finish plating layer, but the formation of a coating film may impair the appearance quality of the dial, which poses a problem.

In the case of the dial of this embodiment, if the coating thickness is 1 .mu.m or more, the coating will become uneven in the character parts and the periphery of the character parts, as well as in the convex corners and concave corners of indicators, which will impair the quality of the appearance. When the coating thickness is reduced to 1 μm or less, thickness unevenness is eliminated, but interference colors occur.

Therefore, it is necessary to form a coating film with a thickness of 5ooX or less that does not cause interference colors, and also has the function of preventing discoloration of the finish plating layer.・Protection of the resin system used in conventional dials. If the film thickness is less than aooX, the anti-discoloration mechanism qB is lost, so it cannot be used.

Next, print the minute scale etc.

Finally, the watch dial of the present invention with the outer diameter and center hole punched is completed (Fig. 5-■). FIG. 6 shows a plan view of the finished product dial.

The above-mentioned watch dial has the same color tone as the surface pattern of the base, but we will explain the production power when the color tone is different.

Before finishing plating, first, electrolytic Ni plating is performed, followed by Au plating in the color tone of the characters, over the entire surface of the characters.

Next, only the text portion is covered with resist.

As one of the five methods for partially applying the resist, for example, a screen printing method can be applied.

Next, Ag plating with the base color is performed.

Finally, when the resist is chemically etched, the text becomes Au.
A plate with a different color pattern ': f-, whose pattern surface is Ag colored based on the color, is produced.

Next, a method of forming matte A-covering and color coating on the parts other than the character parts will be explained.

First, after finishing plating, a transparent preservation layer was formed on the dial.
Covers the resist only in the text area. Next, a desired matte coating or color coating is applied to the entire dial surface. next,
When the resist is chemically dissolved and cleaned, the matte coating and color coating on the resist will peel off together, leaving a watch dial with matte coating or color coating formed on the parts excluding the uneven parts of letters and marks. It becomes possible.

The above finished product dial is tested by heat/yoke test (150015
0 minutes), heat cycle test (600, 30 minutes and -20C,
No abnormal development was observed even in the fade meter test (repeated for 50 minutes) and wet atmosphere for 200 hours, and compared to conventional watch dials, the appearance quality and functional quality were at the same level.

〔effect〕

As described above, according to the present invention, the unevenness of the surface pattern, letters, marks, patterns, symbols, etc. of a watch dial can be formed by photopolymerization using a photosensitive resin, and the surface can be metallized. First, in terms of the manufacturing process, multiple manufacturing processes for conventional dials can be integrated into the same process, and the number of processes has been greatly reduced and simplified, making it much more efficient than mechanization and automation. By eliminating bottleneck processes, automation and unmanned production using a single line with light equipment is possible, and significant cost reductions can be expected.

In addition, in terms of manufacturing delivery time, it becomes possible to carry out continuous production, making it possible to significantly shorten the delivery time.

In addition, other effects can be expected such as a significant reduction in factory space, reduction in indirect costs due to simplified logistics, and elimination of the need for skilled workers.

Next, in terms of design, it is easy to respond to the diversification and expansion of design variety.

That is, for the watch dial of the present invention, first, one master similar to the desired watch dial is made, then a large number of resin mold mothers are made from that master, and the resin mold mother is used repeatedly for one watch. As a result, a large number of watch dials can be made, so even if it costs money to make the first master,
Since a large number of clock dials can be made from one master via a resin-type mother, the production cost of the master can be ignored.

Therefore, designs that could not be adopted with conventional watch dials due to *rl considerations in terms of man-hours can be realized using the watch dial manufacturing method of the present invention.

In addition, in the case of surface patterns, it is possible to use materials found in the natural world (for example, leaves on trees, etc.) as a master and reproduce them on a watch dial.

As described above, a watch dial with an unprecedented design can be supplied at a low price.

This is very important because from now on, watches will be required to have more and more accessory elements as well as functions.

[Brief explanation of the drawing]

Figures 1 - ■ are process diagrams of a conventional printing dial manufacturing method, Figure 2 ■ and ■ are process diagrams of a conventional coining dial manufacturing method, and Figure 6 is a completed conventional typesetting dial. Figure, Figure 4 ■
-■ and FIGS. 5-5 are process diagrams of the method for manufacturing a watch dial of the present invention. FIG. 6 is a plan view of a watch dial of the present invention;
FIGS. 7-7 show process diagrams of a method for manufacturing a resin-type mother. 1... Dial base board 2... Dial fixing feet 6... Paint layer 4... Characters for typesetting 5/Film mask 6 ・PET film 7... Spacer 8... Photosensitive resin monomer 9... Photosensitive resin polymer 10... CR-59 Kizuki 1f type mother 11... Marginal thin layer 12... Transparent protective layer 13... Glass. Applicant: Suwa Seikosha Co., Ltd. Representative Patent Attorney Mogami

Claims (1)

[Claims] fl+ A photosensitive resin dial substrate on which surface patterns, letters, windows, symbols, patterns, and marks are unevenly formed by photopolymerization, and a metalized thin layer is formed on the surface of the photosensitive resin. A watch dial featuring: (2) On a metal base plate, a photosensitive resin layer is formed by photopolymerization with unevenness such as bottom patterns, letters, windows, symbols, pictures, and marks, and a metalized thin layer is further formed on the surface of the photosensitive resin. A clock dial featuring the following features: (3) A watch dial according to claim (2), characterized in that an adhesive layer is provided between the metal base plate and the photosensitive resin layer. (4) A watch dial according to claim +31, characterized in that the layer-receiving agent is made of a mixture of a hydrolyzable silicon compound having an ethylenically unsaturated substituent, a hydrolyzed tetraalkoxysilane, and a flux component. . (5) A timepiece dial according to claim (4), characterized in that the catalyst component is tetraalkoxytitanium or acidic water. (6) In claim (2), a photosensitive resin layer. A watch face plate characterized by having a thickness of 8/100■ or more. (7) In claims + paragraph 11 or (2),
The metallized thin layer is formed in the order of the Ni-based electroless plating layer, the undercoating electrolytic plating layer, and the finishing plating layer, and the thickness of the Ni-based electroless plating layer and the subbing electrolytic plating layer varies from 1510 to 350 mm.
A watch dial characterized in that the dial is in the range of 01. (8) A watch face plate according to claim (7), characterized in that the electrolytic plating layer of the undercoating is a single plating or an alloy plating of Ni, Co, and Fe. (9) In claim (1) or (2), the color tone of the uneven upper surface of letters, windows, symbols, pictures, marks, etc. and the metalized thin layer of the bottom surface pattern of the other photosensitive resin layers are different. A clock dial with *e. Ql A watch dial according to claim i11 or claim (2), characterized in that a transparent protective layer having a thickness of 800X or less is further formed on the metallized thin layer. 0υ A timepiece dial according to claim 1, wherein the transparent protective layer is formed of a film containing one or more hydrolyzable silicon compounds. (1) In claim +11 or (2), a watch character 4 is characterized in that a colored or matte coating layer is formed on the portions of the letters and marks excluding the uneven portions. α3 Metal base plate Pour photosensitive resin monomer on top,
A transparent or translucent mother is placed on top of the metal base plate, and then ultraviolet rays are irradiated from the mother TT4U to create surface patterns, letters, windows, symbols, patterns, and marks on the metal base plate. A method for manufacturing a watch dial in which a synthetic resin layer is formed and a metalized thin layer is further formed on the surface thereof.