JP3153613B2 - Method of manufacturing multi-hand dial for wristwatch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a multi-hand dial for a wristwatch. The present invention relates to a method for manufacturing a multi-needle dial, which takes a manufacturing method by processing and attaching a decorative part to the processing, and revolutionizes the manufacturing method.

[0002]

2. Description of the Related Art A conventional method of manufacturing a multi-hand dial for a wristwatch comprises the following basic steps. (A) Step-down processing of the multi-needle part (b) Surface finish of the entire dial (c) Circumferential diamond cut around the multi-needle part paragraph hole or formation of a vapor-deposited mirror surface (d) Finish plating on the cut part Is a composite finishing process by alternate combination of surface finishing and machining. The following two cases will be described with reference to FIGS. 9 and 10 showing a conventional manufacturing process of a multi-needle dial. (A) Mirror polished finish of thick paint (B) General paint finish

(A) Mirror Polishing of Thick Coating Among the conventional processes, a circle-cut mirror surface or a vapor-deposited metal mirror surface will be described step by step with reference to FIGS. Process number Process name Processing purpose 1) Plating Nickel plating is usually applied to protect the surface during the step grinding for forming the recess. 2) Protective coating Paint on the plating layer to prevent surface scratches during the step grinding of the recess. 3) Multi-needle step grinding Drilling of recesses by machining with a lace. 4) Finish plating Plating for color finish according to customer's design. 5) Color coating Paint for color finishing according to customer design. 6) Screen printing An additional process in response to design changes that make the color of a specific part different from that of other parts. 7) Painting Process to improve the adhesion of printing. 8) Thick coating Transparent thick coating is applied. 9) Mirror polishing To increase the aesthetic appearance, the surface of the thick paint is precisely polished to a mirror surface. 10) Circle cut The shoulder part of the multi-needle step saw is formed with a diamond tool to form a cutting part 14 on the mirror surface. Or 11) Evaporated mirror surface portion A metal mirror surface 16 is formed on the mirror-polished coating by evaporation. 12) Cut part plating Finished plating is applied to the cut part. 13) Printing In addition to the scale printing of hours, minutes, and seconds, decoration such as color and surface gloss is performed by printing. 14) Implant character, and attach text parts or mark parts on the dial.

(B) In the case of general paint finishing In the conventional process, a circle cut mirror surface or a vapor-deposited metal mirror surface will be described step by step with reference to FIGS. Process No. Process Name Processing Purpose 1) Plating Nickel plating is usually applied as protection during the step grinding for forming the recess. 2) Protective coating Paint on the plating layer to prevent surface scratches during the step grinding of the recess. 3) Multi-needle step grinding Drilling of recesses by machining with a lace. 4) Finish plating Plating for color finish according to customer's design. 5) Painting Paint for color or transparent finish according to customer design. 6) Circle cut The shoulder part of the multi-needle step saw is formed on the mirror surface with a diamond bit to form a cutting part 14. Or 7) Mirror surface of vapor deposition A metal mirror surface is formed on the coating by vapor deposition. Formation of 16 8) Plating of cut part Finish plating is applied to the cut part. 9) Printing In addition to scale printing of hours, minutes, and seconds, decoration such as color and surface gloss is performed by printing. 10) Assemble text, as well as text and mark parts on the dial. Caulking

The above-mentioned conventional method has many problems as follows. 1) The specularity of the circle cut is not good. For example, the dial is usually fixed with the center hole and the V
Although it is performed by two points of a mold groove (hereinafter referred to as a notch), it does not have a sufficient fixing force against a mechanical stress such as a circle cut. For this reason, during processing, the dial causes a movement such as minute vibration, and the surface of the cut forms "undulation", thereby deteriorating the quality of the dial. 2) The shape and width of the circle cut are largely restricted, and a convex expression cannot be made. For example, the shape of the cut is determined by the cutting tool used, and the shape of the tip is also given priority to the cutting ability in order to target a fixed and not very good dial. For the same reason, the width of the cut cannot be too large. Also, due to the essence of trenching, there is also a restriction that only concave expressions can be made. 3) It takes time to process the circle cut. For example, this is for a position finding operation using a “center hole, notch” for each dial. 4) The color of the circle cut part is gold and white only. For example, circle cutting process is 1) plating 2) painting
3) Printing 4) Cutting 5) Plating on cut portion Therefore, plating on the cut portion is restricted so as not to destroy the already completed finish of 1) plating 2) painting 3) printing. 5) It is difficult to adjust the gloss of the circle cut part. For example, the circle cut process is performed in the following order: 1) plating 2) painting 3) printing 4) cutting 5) plating on the cut part. Therefore, the adjustment of the gloss to the cut portion is restricted so as not to destroy the already finished finish of 1) plating 2) painting 3) printing. 6) The yield of the circle cutting process is low. For example, the process of circle cutting is 1) plating 2) painting 3) printing
4) Cut 5) Plating on cut part. Therefore, when cutting, 1) plating 2)
Painting 3) The finish that has already been completed, called printing, is susceptible to damage due to chips at the time of cutting and careless handling, leading to a reduction in yield. 7) The consumption cost of the cutting tool used for cutting is large. For example, as already described in 1), the dial is normally fixed at two points, the center hole and the notch on the outer periphery of the dial. Not. In addition, the surface of the dial has warpage as the essence of the thin plate material, undulation due to deformation, and the cutting tool is damaged due to sudden fluctuations in cutting stress, etc. As a result, the cutting ability is reduced and the wear is severe.

[0008] 8) A three-dimensional expression cannot be expected on the vapor deposition mirror surface. This is because, for example, the thickness of the deposited metal is only about 0.1 μm. 9) Processing of the vapor deposition mirror surface requires many man-hours. For example, the steps are 1) evaporation 2) masking 3) etching
4) Removal of masking. 10) The color of the mirror surface is only gold and white. 11) It is difficult to adjust the gloss of the mirror surface of the vapor deposition. For example, process 1
1) Plating 2) Painting 3) Printing 4) Deposition mirror surface Step 2 1) Plating 2) Painting 3) Printing 4) Thick coating 5) Thick coating surface precision polishing (mirror surface formation) 6) Deposition mirror surface It is not possible to make further gloss adjustments because a vapor deposition mirror is produced on the surface in which it is to be made, which will affect all of these. 12) Position accuracy of paragraph section processing is poor. For example, there is a problem in the accuracy of chucking when grinding a race, and a blur of several tens of μ occurs. For this reason, the position of the index printing or the like in the lower part of the paragraph may be apparently shifted, leading to a defect. 13) Dimensional accuracy of paragraph section processing is poor. For the same reason as 12). 14) The paragraph section processing is long. 15) The restrictions on the paragraph section processing are large. In the case of two-color plating a) In the case of a combination of gold above the step and silver below the step, the process is 1) gold plating (whole) 2) masking above the step 3) silver plating below the step The reverse process cannot be set because masking below the column is not possible. On the other hand, the above process requires a strong masking material that can withstand silver plating, but in reality, there is no masking material with a strength that can withstand strongly alkaline silver plating. Due to the above reasons, the two-color plating cannot be manufactured. B) In the case of a combination of black nickel (charcoal gray) above the step and gold, silver, etc. below the step, the process is 1) black nickel plating (whole) 2) masking above the step 3) gold below the step It is created by a process called (silver) plating, and the reverse process cannot be set because masking below the step is impossible. On the other hand, in the above process, black nickel plating (charcoal gray) and the like do not have good adhesion of plating because of the material containing sulfide. Due to the above reasons, the two-color plating cannot be manufactured. In the case of two-color coating The dial is usually coated by air spray coating using air pressure. Such a spraying method is an excellent method for mass production, but it is difficult to perform fine work such as partially applying two different colors to a small item such as a dial. In the case of two-color printing a) In the case of a combination where the upper part of the step is white and the lower part of the step is black, the process is 1) black painting (whole) 2) white printing on the step (twice) Dark like black When printing a light (light) color on a color, it is necessary to print a thicker light color on the upper side in order to prevent a dark color hidden underneath from being seen through. B) In the case of topcoating with thick coating with a combination of white above the step and black below the step, the process is 1) black painting (whole) 2) white printing on the step (twice) 3) transparent Thick coating (whole) 4) Precision polishing of thick coating surface (mirror surface formation)

As described above, the prior art in the method of manufacturing a multi-hand dial for a wristwatch has a number of problems. These problems are rarely caused by the manufacturing method itself. For example, as described in 1), the dial is fixed by two points of a center hole and a V-shaped groove called a notch on the outer periphery of the dial. This is mainly because the fixing force is not sufficient. As a result, it has been found that not only a large number of man-hours are required to manufacture the dial, but also that the quality is reduced as described above.

[0008]

As described above, the prior art in the method of manufacturing a multi-hand dial for a wristwatch is complicated and diversified and requires a lot of inefficient work. There are drawbacks such as lowering the accuracy of the plate. SUMMARY OF THE INVENTION An object of the present invention is to provide a novel manufacturing method capable of solving the above-mentioned drawbacks of the prior art in the manufacturing process of a multi-needle dial, and achieving an epoch-making efficiency and an improved dial quality. .

[0009]

The gist of the present invention is as follows. (1) A method for manufacturing a multi-needle dial for a wristwatch, comprising assembling the multi-needle dial by stacking and attaching a multi-needle plate on a lower base plate and adding a decorative part to the multi-needle hole. (2) A method of manufacturing a multi-hand dial for a wristwatch, which comprises assembling by adding a decorative part to a hole of the multi-hand plate. (3) The above (1) in which a frame ring is used for the decorative part.
3. The method for producing a multi-hand dial for a wristwatch according to claim 1. (4) The method according to (1), wherein a frame ring and a small-diameter plate are used as the decorative parts. (5) The method for manufacturing a multi-hand dial for a wristwatch according to the above (1), wherein a frame ring edge is used as the decorative part. (6) The method for producing a multi-hand dial for a wristwatch according to the above (1), wherein a frame ring edge and a small-diameter plate are used for the decorative component. (7) The method for manufacturing a multi-hand dial for a wristwatch according to the above (2), wherein the decorative component has a frame ring bottom. (8) The method for producing a multi-hand dial for a wristwatch according to the above (2), wherein a frame ring edge and a bottom are used for the decorative part. (9) The method for manufacturing a multi-hand dial for a wristwatch according to the above (2), wherein a frame ring and a small-diameter plate are used as the decorative parts. (10) The method for manufacturing a multi-hand dial for a wristwatch according to the above (2), wherein a frame ring edge and a small-diameter plate are used for the decorative part.

The difference between the conventional method and the method of the present invention will be simply described as follows. That is, the multi-needle dial is manufactured as an integral body in the conventional method, but the method of the present invention is manufactured separately in a shape cut into at least two main parts horizontally, that is, a lower substrate and a multi-needle plate. Then, a method of assembling by laminating and pasting them is adopted. Further, the multi-needle dial is assembled by adding various decorative parts to the holes thereof for the purpose. The method of manufacturing the multi-needle dial according to the present invention is classified as follows according to the combination of these modes. Is done. (3) Frame ring used as decorative part (1) Lower board + multi-needle board (4) + decorative part (frame ring + small diameter plate) used as decorative part (5) Frame ring edge used as decorative part (6) Decoration Use of the present invention method (with frame ring edge + small diameter plate) as a part (7) Use as a decorative part with frame ring bottom (2) Multi-needle plate (8) Use as decorative part + decorative part Use with frame ring edge and bottom (9) Use as decorative part (frame ring + small diameter plate) (10 ) Use as decorative parts (with frame ring edge + small diameter plate)

[0011]

An embodiment of the present invention will be described with reference to the accompanying drawings. Example 1 First, an upper plate 1 of a multi-needle dial is plated with, for example, gold plating, and then a transparent protective coating is applied. Next, for example, silver plating is applied to the lower substrate 2 of the multi-needle dial, transparent protective coating is applied, and hour and minute scales are printed. Next, the frame ring 3 is subjected to an appropriate pretreatment and then plated. Prior to plating, a so-called honing treatment for a satin finish can be performed according to design necessity. The upper plate 1 and the lower substrate 2 of the multi-needle dial, which are separately manufactured, are laminated and pasted together, and the frame ring 3 is added as a decorative part to the multi-needle hole. By plating and painting separately with the substrate 2 and then finishing and bonding,
A major feature is that it can be manufactured with any combination of finishes that were not possible before. Since a mirror ring of better quality than before can be added as the frame ring 3 around the hole, its design value is significantly higher than that of the conventional product. This embodiment corresponds to claim 3.

Example 2 In the same manner as in Example 1, the upper plate 1 and the lower substrate 2 of the multi-needle dial are separately plated, coated, finished, and then bonded together. Instead, the framed ring edge 4 is first honed as required, and then the plated one is added as a decorative part as shown in FIG. Three-dimensional expression "became possible. This embodiment corresponds to claim 5.

Embodiment 3 In the same manner as in Embodiment 1, the upper plate 1 and the lower substrate 2
Is processed and laminated, and a small-diameter plate 5 is further added thereto in addition to the frame ring 3 as a decorative part. Here, the parts to be added to the multi-needle section paragraph hole of the dial called the small-diameter plate are:
It is manufactured by any one of the following steps. (a) First, apply a perforated pattern radially or streaked,
Next, a plating treatment, a protective coating thereon, and a press punching process are used as the small-diameter plate 5. (b) First, a sand pattern or an engraved metal pattern is formed on the material by electroforming, plated, and further subjected to protective coating, and then pressed to form a small-diameter plate 5. (c) Use a natural material such as leather or shellfish, or use a precious stone such as opal or ceramics, pre-treat it, apply coloring, etc., and finish it by pressing or the like to obtain a small-diameter plate 5. . As shown above, the multi-needle dial shown in FIG. 2 is composed of a rear frame ring 3 and (a), (b), (c) in which the upper plate 1 and the lower substrate 2 of the multi-needle dial are overlapped and bonded. Small-diameter plate 5 manufactured in any process
Is added and assembled as a decorative part. Lower substrate 2
Is finished by adding the small-diameter plate 5, but a part of the multi-needle hole can utilize the finish of the lower substrate 2 without the "small-diameter plate". Small diameter plate 5
Addition of makes it possible to abundantly change the design of the dial finish, for example, to perform patterning such as “radial weighting and stitching” and to express “two colors of plating” using a masking method. . It is also possible to incorporate natural materials such as "shellfish, leather, wood, paper, cork", "solid materials such as gold and platinum", and "precious stones (opal, lapis, etc.)". Also, various electroformed patterns such as "sand ground, metal engraved product, etc." can be processed to various finishes similarly to the dial, and then punched to a certain size and press-processed for attachment. This embodiment corresponds to claim 4.

Fourth Embodiment A fourth embodiment shown in FIG. 4 is a case where a frame ring rim 4 is used instead of the frame ring 3 in the third embodiment shown in FIG. That is, in the present embodiment, the upper plate 1 and the lower substrate 2 of the multi-needle dial, which are separately processed, are overlapped and affixed, and the frame ring edge 4 and the (a), (b), (c) In the third embodiment, the small-diameter plate 5 manufactured in any one of the steps is added, and the versatility of the dial finish design that can be generated by adding the small-diameter plate 5 is described in the third embodiment. But the same is true. This embodiment corresponds to claim 6.

Embodiment 5 The following embodiment is a manufacturing method corresponding to a wristwatch movement in which a thick dial cannot be used. There is no lower substrate 2 with a multi-hand dial, and a bottomed component is used as a decorative component. If you use. Therefore, the upper plate 1 of the multi-needle dial used in this case is particularly called a multi-needle dial 6. First, the multi-needle dial 6 is plated, coated with a protective coating, and scales such as hours and minutes are printed thereon. On the other hand, after the honing, plating, and protective coating of the frame ring bottom 7 as shown in FIG. 5 are performed as necessary, and after performing the required printing, the multi-needle dial 6 and the frame ring bottom 7 are assembled as shown in FIG. In this case, the multi-needle dial is assembled as shown in FIG.

Embodiment 6 The multi-needle dial 6 is processed in the same manner as in Embodiment 5, and the frame ring edge and the bottom 8 as shown in FIG. After printing,
The multi-handed dial 6 and the frame ring edge and the bottom 8 are assembled as shown in FIG. 6 to form a multi-handed dial, which corresponds to claim 8.

Example 7 A multi-needle dial 6 on which plating and protective coating are applied in the same manner as in Example 5 and a scale such as hour and minute is printed thereon, and Example 1
As described in, after honing as necessary,
Plating frame ring 3 and (a), (b),
10. A multi-needle dial is produced by assembling a small-diameter plate 5 which has been subjected to any one of the processes (c) as shown in FIG.
It corresponds to.

Example 8 A multi-needle dial 6 on which plating and protective coating are applied in the same manner as in Example 5 and scales such as hours and minutes are printed thereon, and Example 7
As shown in FIG. 8, a small-diameter plate 5 using a frame ring rim 4 in place of the frame ring 3 and having been subjected to any one of the processes (a), (b) and (c) of the third embodiment is assembled as shown in FIG. This is a multi-needle dial, and corresponds to claim 10.

[0019]

According to the conventional method of manufacturing a multi-hand dial for a wristwatch, the material used is not only metal but also natural materials such as leather and shells, and the color is not limited to gold and silver. However, extremely diverse colors have been demanded, and the manufacturing process has been complicated and diverse, and has been an overflow of mass production.However, the manufacturing method according to the present invention has brought about a revolutionary change, The following effects were obtained. (A) Since the conventional process of forming the concave portion is completely eliminated, the manufacturing process is merely a laminating and assembling process, and the number of steps is dramatically reduced. (B) Since a mirror surface is formed by assembling using a frame ring as an alternative to the circle cut, all problems in the conventional processing method can be solved. (C) Since cutting is performed by automatic grinding using a pipe material or a rod material, the holding of the material is ensured, so that the manufacturing accuracy is remarkably improved, and the mirror cutness of the circle cut is also improved. (D) Since cutting is performed by automatic grinding using pipe material or rod material, the type of cutting tool and the degree of freedom of setting are large, so the shape like a direct circle cut to the dial,
There is no restriction on the width. In addition, it is possible to easily realize processing (with a rim) to be expressed (convex) upward from the surface of the dial, and the degree of freedom in design has been dramatically expanded. (E) The number of man-hours for processing circle cuts has been significantly reduced due to automatic grinding. (F) Since it is a separate process, the color of the circle cut part can be freely selected besides gold and white. (G) Since it is a separate process, the gloss of the circle cut part can be adjusted freely, and the range of expression has been expanded. (H) Since the material yield is determined by automatic grinding, it has been greatly improved compared to circle cutting. (I) Since the material held by the sufficient fixing force is cut under near-ideal conditions using cutting oil, the consumption of the cutting tool used is minimized. (U) Since the degree of freedom in the setting of the bite is large, the disadvantage of the three-dimensional expression, which is a drawback of the vapor deposition mirror surface, has been solved. (L) The processing man-hour was only the labor of ring processing, finish plating, and assembling, and a remarkable reduction in the man-hour was achieved as compared with the processing of the vapor deposition mirror surface. (E) The color of the mirror surface of the vapor deposition is only gold and white, but there is no restriction on the separately processed ring, so the variety of designs has increased. (W) Unlike the vapor deposition mirror surface, the gloss can be easily adjusted. (F) The positioning accuracy of the paragraph section processing has been dramatically improved. Accordingly, problems such as misalignment of the printing position have been solved. (S) The dimensional accuracy of paragraph section processing has also been dramatically improved. Therefore, problems such as misalignment of the printing position have been solved. (T) By adding a small-diameter plate, the variety of designs by combining patterns, colors and materials has been dramatically expanded.

[Brief description of the drawings]

FIG. 1 is a partially enlarged sectional view and a corresponding partially enlarged plan view showing a third embodiment of a method for manufacturing a multi-hand dial for a wristwatch according to the present invention.

FIG. 2 is a partially enlarged sectional view and a corresponding partially enlarged plan view showing a fourth embodiment according to the present invention.

FIG. 3 is a partially enlarged sectional view and a corresponding partially enlarged plan view showing a fifth embodiment according to the present invention;

FIG. 4 is a partially enlarged sectional view and a corresponding partially enlarged plan view showing a sixth embodiment according to the present invention.

FIG. 5 is a partially enlarged sectional view and a corresponding partially enlarged plan view showing a seventh embodiment according to the present invention.

FIG. 6 is a partially enlarged sectional view and a corresponding partially enlarged plan view showing an eighth embodiment according to the present invention.

FIG. 7 is a partially enlarged sectional view and a corresponding partially enlarged plan view showing a ninth embodiment according to the present invention;

FIG. 8 is a partially enlarged sectional view and a corresponding partially enlarged plan view showing a tenth embodiment according to the present invention;

FIG. 9 is a cross-sectional view and a corresponding plan view showing a step sawing portion 12 and a circle cutting portion 14 according to a conventional method for manufacturing a multi-hand dial for a wristwatch.

FIG. 10 is a cross-sectional view and a corresponding plan view showing a step sawing portion 12 and a vapor deposition mirror surface portion 16 according to a conventional method for manufacturing a multi-hand dial for a wristwatch.

[Description of Signs] 1 Upper plate of multi-needle dial 2 Lower substrate of multi-needle dial 3 Frame ring 4 With frame ring edge 5 Small diameter plate 6 Multi-needle dial 7 With frame ring bottom 8 Frame ring edge, bottom 12 steps Grinding part 14 Circle cut part 16 Evaporation mirror surface part

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields investigated (Int. Cl. ⁷ , DB name) G04B 19/00 G04B 19/06 G04B 19/10 G04B 37/22 G04B 45/00

Claims (10)

(57) [Claims] 1. A method for producing a multi-hand dial for a wristwatch, comprising assembling a multi-needle plate by laminating and attaching a multi-needle plate on a lower base plate and adding a decorative part to a multi-needle hole. 2. A method of manufacturing a multi-hand dial for a wristwatch, comprising assembling by adding a decorative part to a hole of the multi-hand plate. 3. The method according to claim 1, wherein a frame ring is used as the decorative part. 4. The method according to claim 1, wherein a frame ring and a small-diameter plate are used as the decorative parts. 5. The method for manufacturing a multi-hand dial for a wristwatch according to claim 1, wherein a frame ring edge is used for the decorative part. 6. The method of manufacturing a multi-hand dial for a wristwatch according to claim 1, wherein the decorative component has a frame ring edge and a small-diameter plate. 7. The method for manufacturing a multi-hand dial for a wristwatch according to claim 2, wherein a frame ring bottom is used as the decorative part. 8. The method of manufacturing a multi-hand dial for a wristwatch according to claim 2, wherein a frame ring edge and a bottom are used for the decorative part. 9. The method according to claim 2, wherein a frame ring and a small-diameter plate are used as the decorative part. 10. The method of manufacturing a multi-hand dial for a wristwatch according to claim 2, wherein a framed ring edge and a small-diameter plate are used for the decorative part.