JP2007240416A - Index with foot, manufacturing method therefor, and display panel using the index with foot - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an index with a foot that can be formed at low cost, can form even a thick and complex shape, and has large mounting strength. <P>SOLUTION: Electrocasting plating is performed by providing a conductive metal film 51 in an electrocasting mother die 40, that is made of resin and has a recess 41 for forming the shape of the index; metal is deposited at the recess 41 for forming a primary index blank 50A; the primary index blank 50A and the electrocasting mother die 40 are subjected to grinding machining or cutting machining; a secondary index blank 50B, in which a rectangular foot 52b is provided is formed at the primary index blank 50A; then, the secondary index blank 50B is peeled from the electrocasting mother die 40; and the secondary peeled index blank 50B is subjected to finishing plating and an index with foot is obtained. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a footing index used as an index, a manufacturing method thereof, and a display board using the footing index.

  2. Description of the Related Art Conventionally, in a portable timepiece or the like, a set-type foot indicator indicating a time character or the like has been used by being attached to a timepiece display board. This is because the footing indicator is made of metal and the metallic decoration gives a precious metal feeling and gives a high-class feeling. Also, since the footing indicator has a thickness, a three-dimensional appearance appears on the clock display board, giving a sense of decoration. The reason is that it can be increased, and a strong fixing force to the display board can be obtained, so that the index does not easily fall off. In addition to portable watches, it can be seen that typesetting footstep indicators are used for expensive nameplates and display panels. These conventional foot markers generally have a method of having two thin feet and inserting them into small holes in the display panel and fixing them by a caulking method. Hereinafter, the shape and manufacturing method of the conventional footing indicator will be described by taking the footing indicator used for the watch display board as an example. As one of the techniques showing a conventional method of manufacturing a footstep indicator, the following patent document 1 can see the disclosed technique.

Published Utility Model Publication No. Sho 52-167063

  An embodiment of the technique disclosed in Patent Document 1 will be described with reference to FIGS. FIG. 22 is a perspective view of a typesetting as a footing index shown in Patent Document 1, and FIG. 23 is a vertical cross-sectional view of a mold and a material showing a method for producing the typesetting shown in FIG. Show. As shown in FIG. 22, the typesetting 5 is a timepiece for a watch, having a stepped portion 2 on the front side and two thin legs on the back side. As shown in FIG. 23, the two thin legs 3 are formed integrally with the typesetting 5 so as to protrude vertically from the back surface. This typesetting 5 is formed by press working. As shown in FIG. 23, a metal plate is pressed with a press die composed of an upper die 10 and a lower die 11, and two thin legs 3 and a step portion are formed. 2 is extruded to form the typesetting blank 1. Then, the typesetting 5 is formed by cutting A-A 'and B-B' by a cutting die (cutting die).

  The typesetting 5 formed in this way takes the structure shown in FIG. 24 and is fixed to the watch display board. FIG. 24 is an enlarged cross-sectional view showing a structure in which the typesetting is fixed to the watch display board. As shown in FIG. 24, the clock display board 9 is provided with two small holes 9a (two small holes for one typesetting) into which the two feet 3 of the typesetting type 5 are inserted. The method of fixing the typesetting 5 to the display board 9 is to insert the two feet 3 of the typesetting 5 into the two small holes 9a of the display board 9, and then crush the tip of the leg 3 with a caulking machine. Thus, the typesetting 5 is fixed to the display board 9. In some cases, an adhesive is applied to the crushed tip of the foot 3 to secure a further fixing force.

  Here, materials such as a brass plate, phosphor bronze plate, and white plate having a thickness of 0.3 to 0.5 mm are mainly used for the timepiece display plate. In addition, a plastic plate is mainly used for a display plate for a solar cell. On the other hand, the typesetting has a thickness of 0.3 to 0.5 mm, a foot outer diameter φ of about 0.2 to 0.35 mm, and a foot length of 0.35 to 0.7 mm. Yes.

The conventional typesetting having the above structure has the following problems. As a first problem, post-processing such as cutting cannot be easily performed. Even if you want to cut the top, side, or slope of the typesetting with a diamond tool to make it beautiful and glossy, the thickness is thin, the legs are thin, and the shape of the typesetting is complicated. This is because the part to be held by the chuck cannot be removed. For this reason, when cutting, a method of cutting by fixing the typesetting to the processing jig with an adhesive is also used. However, this method requires an exfoliation operation in a later process, and is a time-consuming operation. In addition, there has also been a problem that spots are generated by decorative plating in a later process due to insufficient peeling, which has been a cause of poor yield.

  As a second problem, since complicated processing cannot be performed, the shape of the typesetting itself can only be a simple shape, and it has been difficult to further improve the decorativeness by producing a rounded curved shape.

  As a third problem, the surface cut with the diamond tool shows a beautiful gloss, but the surface that cannot be cut does not show the gloss, and the overall glossy typesetting cannot be obtained.

  The present invention has been made in view of the above-mentioned problems, and has a thickness, gloss, rounded curved shape, and a decorative property with a precious metal feeling and a three-dimensional effect. It is an object of the present invention to provide a footing index that has a high sense of quality and that makes it easy to form a foot and attach the footing index to a display board, and a manufacturing method thereof.

  As a means for solving the above-mentioned problems, the feature of the footing indicator according to claim 1 of the present invention is that a primary indicator blank formed by an electroforming plating method using an electroforming mother die made of resin is used. A secondary index blank having an index foot formed by grinding or cutting is formed, and then the secondary index blank is formed by peeling from the electroforming mold. is there.

  According to a second aspect of the present invention, the foot indicator has a quadrangular cross section.

  According to a third aspect of the present invention, the step indicator is characterized in that the electroforming mother mold is made of a resin to which a plating metal is adhered by a wet plating method.

  According to a fourth aspect of the present invention, the foot-casting index is characterized in that the electroformed mother mold is made of an ABS resin.

  According to a fifth aspect of the present invention, a footing indicator is characterized in that a conductive metal film is provided on the electroforming mother die.

  According to a sixth aspect of the present invention, the footing indicator is characterized in that the conductive coating is made of at least one metal selected from silver, copper and nickel.

  Moreover, the feature of the footing indicator according to claim 7 of the present invention is that the secondary indicator blank is peeled from the electroformed mother die by performing a heat treatment on the electroformed mother die. To do.

  Further, the footing index according to claim 8 of the present invention is characterized in that the secondary index blank is peeled off from the electroforming mother mold by immersing the electroforming mother mold in an organic solvent. It is characterized by melting the mold.

  According to a ninth aspect of the present invention, the step indicator is characterized in that the secondary indicator blank is subjected to finish plating after the secondary indicator blank is peeled off from the electroforming matrix. Is.

According to a tenth aspect of the present invention, there is provided a method for producing a footing indicator comprising: a step of producing an injection mold for forming an electroformed mother mold; and a method of producing an injection mold from a resin by an injection molding method using the mold. Forming an electroformed mother die, forming a conductive metal film on the electroformed mother die, and performing thick plating on the electroformed mother die by an electroforming plating method to form a first index blank. A step, a step of forming a second index blank provided with an index foot by a grinding method or a cutting method on the first index blank, a step of peeling the second index blank from the electroforming mother mold, And a step of performing finish plating on the second index blank peeled off from the electroforming mother die.

  Further, the feature of the method for manufacturing a foot mark according to claim 11 of the present invention is characterized in that the foot of the mark has a rectangular cross section.

  According to a twelfth aspect of the present invention, there is provided a method for producing a footing index, wherein the electroforming mother mold is made of a resin to which a plating metal is adhered by a wet plating method.

  According to a thirteenth aspect of the present invention, there is provided a method for producing a footing index, wherein the electroformed mother mold is made of an ABS resin.

  According to a fourteenth aspect of the present invention, there is provided a method for manufacturing a foot index, wherein the step of forming the second index blank includes grinding the electroformed mother die simultaneously with grinding or cutting of the foot of the index. It is characterized by performing processing or cutting.

  In addition, a feature of the method for manufacturing a foot mark according to claim 15 of the present invention is that the foot processing of the index is performed by grinding or cutting, and the first processing step of processing the total thickness including the index main body and the foot. And a third process step that processes the X direction or the Y direction of the foot, and a third process step that processes the X direction or the Y direction of the foot that has not been processed in the second process step. It is characterized by being processed.

  According to a sixteenth aspect of the present invention, there is provided a method for producing a footing index, wherein the conductive coating is made of at least one metal selected from silver, copper, and nickel.

  Moreover, the feature of the manufacturing method of the footing indicator according to claim 17 of the present invention is that the second indicator blank is peeled from the electroformed mother die by subjecting the electroformed mother die to a heat treatment. It is a feature.

  Further, the feature of the manufacturing method of the footing indicator according to claim 18 of the present invention is that the second indicator blank is peeled from the electroformed mother die by immersing the electroformed mother die in an organic solvent. It is characterized by melting the casting mold.

  The display board according to claim 19 of the present invention is a display board to which a footing indicator is attached, and the footing indicator according to any one of claims 1 to 9 is provided via an adhesive. It is characterized by being attached.

  The display board according to claim 20 of the present invention is a display board to which a footing indicator is attached, and is formed by the manufacturing method of a footing indicator according to any one of claims 10 to 18. It is characterized in that it is formed by attaching a footing index via an adhesive.

  In addition, the display board according to claim 21 of the present invention is characterized in that a foot of the footed indicator is crimped to the display board.

  As an effect of the invention, the footing indicator of the present invention forms a primary indicator blank by an electroforming plating method using an electroforming mother mold made of resin. Since the primary index blank is formed by transferring the shape of the electroforming mother die, an index shape having a desired shape can be obtained. It is possible to obtain a rounded curved surface shape index, a complicated shape index, and other various shape variations. And a thick index is obtained. Further, by subjecting the injection mold to a mirror finish, the electroformed mother die is finished to a glossy surface, and a glossy index surface is obtained also on the primary index blank by transfer. Moreover, since the electroforming mother mold can be mass-produced, it can be formed at a low cost. Further, in the present invention, the secondary indicator blank is formed by providing the indicator foot by grinding or cutting in a state where the primary indicator blank is integrated with the electroformed mother die. The electroforming mold serves as a chuck for the primary index blank in grinding or cutting, so that grinding or cutting can be easily performed, and quality effects such as scratches on the primary index blank. Does not affect. In the prior art, the index foot is chucked and cutting or the like is performed. However, in the present invention, it is not necessary to chuck the index foot, so that the foot is not deformed. Then, the secondary index blank is peeled off from the electroforming mother mold to obtain a footing index. Since the number of manufacturing steps is short and mass production is possible, a footing index can be obtained at a low manufacturing cost.

  As a method of peeling the secondary index blank from the electroformed mother mold, the peeling can be easily performed by applying heat treatment to the electroformed mother mold to soften the electroformed mother mold. Further, when the electroformed mother mold is dissolved by immersing the electroformed mother mold in an organic solvent, the peeling can be easily performed. Either method can be processed in large quantities at a time, so it is mass-productive and the cost can be reduced.

  In the present invention, the cross-section of the index foot is set to a square shape. When the shape is rectangular, grinding or cutting can be completed in three steps, and the shape of the grinding tool or cutting tool can be simplified. In addition, when it is rectangular, a gap is generated when it is inserted into the round mounting hole of the display panel, and an adhesive can be poured into the gap, so that strong adhesive strength can be obtained. In addition, since the corner is an edge (acute angle) in the case of a quadrangular shape, even if it is slightly larger than the mounting hole of the display board, it can be inserted while cutting the mounting hole. The allowable size of the square shape can be expanded.

  In the present invention, when the electroforming mother mold is formed from a resin to which plating metal adheres by a wet plating method, a conductive metal film can be provided on the electroforming mother mold by an electroless plating method. It can be mass-produced, and a conductive metal film can be formed in a short time, and the manufacturing cost can be reduced. In addition, an ABS resin is preferably selected as the resin. When the ABS resin is used, a beautiful plating film can be obtained.

  In the present invention, a conductive metal coating is provided on the electroforming mother mold. As a result, electroforming plating is possible, and an index with a clean metal surface can be obtained. Moreover, the metal which consists of silver, copper, and nickel is set as a suitable metal as a metal material of this electroconductive metal film. These metals have good adhesion to the electroformed plating and also provide adhesion to the electroformed mother mold. Thereby, even if the electroformed mother die is chucked when grinding or cutting is performed on the primary indicator blank, the primary indicator blank can be processed without being peeled off from the electroformed mother die.

  Further, after the secondary index blank is peeled off from the electroforming mother mold, finish plating is applied to the secondary index blank. This finish plating determines the appearance color of the indicator. Variations of precious metal feeling and various metal colors can be obtained.

Next, the method for manufacturing a foot mark according to the present invention includes a step of manufacturing an injection mold, a step of injection molding an electroformed mother die made of resin, and forming a conductive metal film on the electroformed mother die. Forming a first index blank by performing electroforming plating on an electroforming mother mold, and forming a second index blank by providing an index foot on the first index blank by a grinding method or a cutting method; A step, a step of peeling the second index blank from the electroformed mother die, and a step of performing finish plating on the second index blank peeled from the electroformed mother die. If the electroforming mold is formed by injection molding with resin, mass production is possible and the electroforming mold can be made at low cost. Further, a glossy surface can be obtained on the electroformed mother die by transfer from the mirror-finished mold, and this glossy surface is also transferred to the primary index blank formed by the electroformed mother die to be the first. A glossy surface is also obtained for the next index blank. The effect of obtaining a glossy index is obtained.

  In addition, it is possible to perform grinding or cutting of the foot of the index in a state where the electroformed mother die and the primary index blank are integrated. At that time, since the electroformed mother die can be used as a fixing jig (chucking) for the primary index blank, it is not necessary to prepare a special chucking jig and the first index blank can be used in a stable state. The primary index blank can be processed. In addition, since the electroformed mother die made of resin is easy to cut and the like, the electroformed mother die can be processed together when the first index blank is processed with the foot. Moreover, the process which determines the total thickness of the parameter | index containing a leg in a 1st process process is performed, and the X direction or Y direction of a leg is processed in a 2nd process process next. And it becomes unprocessed in the last third processing step, and the X direction or Y direction of the foot is processed. As a result, the foot is completed in three steps. By adopting such a processing method, it is possible to produce a footstep index with a small number of processing steps, and to reduce processing costs. In addition, it becomes easy to manage dimensions such as the height, width, and thickness of the index.

  The secondary index blank provided with index legs in this manner is then peeled from the electroformed mother mold. Peeling of the secondary index blank can be easily performed by heat-treating the electroformed mother mold to soften the electroformed mother mold. The peeling can also be easily performed by immersing the electroformed mother mold in an organic solvent to dissolve the electroformed mother mold. Both can be easily peeled off without scratching the secondary index blank. Moreover, since these methods can be mass-produced, they can be produced at a low manufacturing cost.

  Then, finish plating is applied to the peeled secondary index blank. Various kinds of metal plating can be applied, and a precious metal feeling and various colors can be produced, so that the decorativeness is enhanced and the decoration variation is increased.

  In addition, as a step of forming a foot index, formation of an electroforming mother mold by injection molding, formation of a primary index blank by electroforming plating, formation of a secondary index blank by grinding or cutting, secondary index A footing indicator can be formed by a relatively short process of peeling the blank from the electroforming mother mold and finish plating the secondary indicator blank. Moreover, since each process can also be mass-produced, it can be manufactured at a low cost.

  In addition, the cross-section of the indicator foot is square, the electroformed mother mold is formed from a resin to which the plating metal adheres by a wet plating method, the electroformed mother mold is formed from an ABS resin, a conductive coating Since the above-described effects such as the construction of at least one of silver, copper, and nickel are as described above, description thereof is omitted here.

  Moreover, the display board of this invention forms a display board using the above-mentioned footstep parameter | index. Since the foot cross section of the foot indicator has a square shape, a gap is created when it is inserted into a round mounting hole (small hole) on the display board, and adhesive can be poured into the gap, making it strong. High adhesive strength can be obtained. In addition, since the corner is an edge (acute angle) in the case of a quadrangular shape, even if it is slightly larger than the mounting hole of the display board, it can be inserted while cutting the mounting hole. Even if the dimensional accuracy of the rectangular shape varies, the usable range can be widened.

Further, the shape of the index (the shape of the index appearing on the display board) is formed by transferring the shape of the electroforming mother mold. Since various shapes such as a rounded curved surface shape and a pattern shape can be formed, a variety of decoration variations can be provided. In addition, a noble metal feeling and glossiness can be obtained as a footing indicator, and a thick three-dimensional feeling can be obtained.

  Furthermore, if the feet of the footed indicator and the display plate are caulked, the mounting strength of the indicator becomes even stronger. Since it is a double fixing structure of fixing with an adhesive and fixing with caulking, the mounting strength is further increased.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS. Here, FIG. 1 shows a perspective view of a foot indicator according to the embodiment of the present invention as seen from the foot side. FIG. 2 is a perspective view of an electroformed mother die used for forming the foot mark shown in FIG. FIG. 3 is an explanatory view for explaining a forming method until a secondary index blank of a foot index is formed using the electroformed mother mold shown in FIG. 2, and FIG. 3 (a) is an electroformed mother mold. 3B is a cross-sectional view in which a conductive metal film is formed, FIG. 3B is a cross-sectional view in which a first index plank is formed by electroforming plating, and FIG. 3C is a secondary view in which grinding is performed. A sectional view in which an index blank is formed is shown. 4 is an explanatory perspective view for explaining the grinding procedure in FIG. 3 (c), and FIG. 5 is an explanation for peeling the second index blank shown in FIG. 3 (c) from the electroforming mother mold. 6 and 6 show perspective views of the secondary index blank shown in FIG. FIG. 7 is a plan view of a timepiece display board using the foot markers according to the present embodiment, and FIG. 8 shows a cross-sectional view and a rear view of the main part of the portion D in FIG. a) is a sectional view of the main part, and FIG. 8B is a rear view.

  The footing indicator according to the present embodiment is a footing indicator used for a clock display board and has the shape shown in FIG. Here, the legged indicator 30C is made of metal, and is composed of an indicator main body 32a (a portion that protrudes on the display board when attached to the display board) and two legs 32b having a quadrangular prism shape. Although not shown, the surface is plated with a finish plating, for example, a metal such as Au, Pt, Pd, Rh, or Cr, or a binary alloy metal using these metals. The two legs 32b are legs attached to the display board, and are fixed to the display board with the legs 32b. The legs 32b have a quadrangular prism shape having a regular quadrangular cross-sectional shape.

  In order to produce this footing indicator 30C, an electroforming mother mold shown in FIG. 2 is used in this embodiment. The electroformed mother die 20 shown in FIG. 2 is made of resin, and is provided with a concave portion 21 for forming an index at a substantially central portion thereof. The shape of the recess 21 is the same shape and the same size as the shape of the index body 32a of the foot mark 30C shown in FIG. 1, and the depth of the recess 21 is formed slightly deeper than the thickness of the foot index 30C. ing. Further, the inner surface of the recess 21 is finished to a glossy surface, and a glossy surface is obtained by transfer from an injection mold subjected to mirror finishing. The size and thickness of the electroformed mother die 20 are appropriately set in consideration of the size and thickness of the legging indicator to be formed. In the present embodiment, one recess 21 is provided in the electroforming mold 20, but depending on the case, it is possible to form a plurality of recesses, and the size of the electroforming mold depends on the number to be formed. It is good to set. This electroformed mother die 20 is formed of ABS resin in this embodiment. The ABS resin has a plating metal film easily attached to the resin surface by electroless plating. The electroforming mother mold 20 is provided with a conductive metal coating. However, when the electroforming mother mold 20 is formed of ABS resin, the conductive metal coating can be easily formed by a wet plating method that is electroless plating. The formation cost of the conductive metal film can be reduced. Moreover, the merit which can make the film thickness of a conductive metal film uniform can also be obtained. The electroforming mold 20 is molded using an injection molding machine and an injection mold.

Next, the footing indicator 30C is formed by the method shown in FIGS. First, in FIG. 3A, a conductive metal film 31 is formed on the inner surface of the recess 21 of the electroformed mother die 20. This can be provided by an electroless plating method because the electroformed mother die 20 is made of ABS resin. A method in which a conductive metal film is formed on the entire surface of the electroforming mold 20, and then an unnecessary portion is peeled off by an etching method so that the conductive metal film is left only at a necessary portion. The conductive metal film 31 is formed by a method such as a method of forming a conductive metal film only on a necessary part by masking a non-existing part. Although not shown, a conductive metal film connected to the conductive metal film 31 of the recess 21 is provided on a part of the upper surface 20a of the electroforming mother mold 20 for an electrode for electroforming plating. In the present invention, the formation of the conductive metal film 31 is not necessarily limited to the wet plating method in which electroless plating is performed. You may form by dry-type plating methods, such as a vacuum evaporation method and sputtering method.

  For the conductive metal coating 31, a metal material with good conductivity is selected, and metals such as Cu, Ni, and Ag can be suitably selected in consideration of adhesion to electroformed plating. These metals have good conductivity and good adhesion. The conductive metal film 31 is provided with a thickness in the range of 0.2 to 1.0 μm.

  Next, in FIG. 3 (b), an index blank 32 made of metal is deposited by electroforming plating to form a primary blank 30A. The primary index blank 30 </ b> A includes a conductive metal film 31 and an index blank 32. Although the index blank 32 of this embodiment is formed from Ni metal, the index blank can also be formed using a metal such as Cu. The thickness of the index blank 32 is formed to be thicker than the total thickness including the thickness of the foot 32b of the footed index 30C and the index body 32a shown in FIG. The total thickness dimension of the timepiece leg indicator varies depending on the type, but is generally 0.6 to 1.0 mm. The indicator blank 32 is obtained by performing electroplating to a required thickness while stirring the plating bath solution in the plating tank.

  Next, in FIG. 3C, the primary index blank 30A is ground to form the legs 32b. By forming the foot 32b, the indicator blank 32 is divided into a portion of the foot 32b and a portion of the indicator body 32a, and a secondary indicator blank 30B is formed. In FIG. 3C, 32e hits the lower surface of the indicator main body 32a, but the lower surface 32e of the indicator main body 32a becomes a ground surface. In the present embodiment, the legs 32b are formed by a grinding method. However, the processing method is not limited to grinding, and may be cutting. Cutting can be performed using an end mill, and the legs 32b can be formed by milling or the like.

  In this case, the grinding process includes not only the primary index blank 30 </ b> A but also the electroformed mother die 20, which are simultaneously processed together. In FIG. 3 (c), P in the alternate long and short dash line indicates a shape portion of the electroformed mother die 20 before processing, and Q indicates a grinding allowance or a cutting allowance. It cuts off also including the lower surface side of the foot 32b.

FIG. 4 shows a processing procedure. First, in FIG. 4A, as a first processing step, the primary index blank 30A and electroforming are formed in the Y direction in order to finish the tip surface of the foot 32b flat and to determine the total thickness of the footing index. The mother die 20 is ground with a required dimension using a grinding wheel. Next, in FIG. 4B, as the second processing step, either the X direction or the Y direction is ground using a grinding wheel. Finally, as a third processing step, an unprocessed portion, that is, an unprocessed portion in the X direction or the Y direction is processed to create the foot 32b. Either the X direction or the Y direction may be ground first. Moreover, it is preferable to use a grinding wheel shaped so that two and three surfaces can be ground at a time for the grinding wheel in the X direction and the Y direction, respectively. Thus, it can grind and can form the leg 32b of a predetermined dimension. The square shape of the foot 32b is created by this grinding process. Here, the electroforming mother die 20 is used as a fixing jig for the primary index blank 30A when grinding. Then, the processing dimension is set with the lower surface of the electroforming mother die 20 (the surface opposite to the primary index blank 30A) as the reference surface. Since the lower surface of the electroforming mother die 20 forms a flat surface, the primary index blank 30A can be fixed in a stable state for grinding. In addition, the dimensions can be easily set and processed with high accuracy. Further, the processed electroformed mother die 20 can no longer be used, but since the electroformed mother die 20 can be mass-produced at a low cost, there is no problem of supply quantity of the electroformed mother die 20. It is also possible to process a plurality of primary index blanks 30A at a time by arranging a plurality of electroformed mother dies 20. If several processes are performed at once, further cost reduction effect will be produced. In addition, the electroforming mold 20 is enlarged, a plurality of recesses for forming the index are provided, electroforming plating is performed using the electroforming mold, and then the legs are formed by grinding. The processing efficiency is further increased and the cost is reduced.

  When the leg 32b is formed and the secondary index blank 30B is obtained, the secondary index blank 30B is peeled from the electroformed mother die 20 as shown in FIG. In this embodiment, the peeling method is performed by applying heat of 80 ° to 120 ° to the electroforming mold 20 to soften it, and separating the secondary index blank 30B and the electroforming mold 20 in the softened state. Are taking the way. It can be peeled off easily and cleanly. Note that the peeling method is not limited to this heating method, and a method of peeling the electroformed mother die 20 by dissolving it with a solvent such as acetone can also be used.

  In this way, the secondary index blank 30B is peeled from the electroformed mother die 20 to obtain an index having the shape shown in FIG. The shape of the index main body 32a of the secondary index blank 30B is the same as the shape of the concave portion 21 carved in the electroformed mother die 20. The size is also the same. The shape of the indicator main body 32a is determined by the shape of the concave portion 21 carved in the electroforming mother die 20. If a desired shape is provided in the recess 21, an index of the shape can be obtained. By using the manufacturing method of the present invention, it is possible to form indexes of various shapes. Various shapes such as a round curved surface shape, a pattern shape, and a pattern shape can be obtained. Further, since the concave portion 21 of the electroformed mother die 20 has a glossy surface, the surface of the indicator main body 32a of the peeled secondary indicator blank 30B appears glossy. And even if finish plating is performed in the next process, the gloss does not disappear and the gloss appears on the plated surface.

  Finally, the footing index 30C shown in FIG. 1 is obtained by finish plating the secondary index blank 30B.

  The indicator with a foot 30C thus formed is attached to a display plate blank to obtain a display plate with an indicator. FIG. 8 shows a display panel for a watch. The display board 35 has a configuration in which a legged indicator 30C having a time character is attached to the display board blank 36. The display board blank 36 is made of a material such as a brass plate, a phosphor bronze plate, or a whiteboard, and the surface is subjected to a surface treatment such as painting or plating, and a pattern is also provided. The display board blank 36 is provided with two round small holes 36a at a portion to which the foot mark 30C is attached.

  As shown in FIG. 8, the two legs 32 b of the foot mark 30 </ b> C are inserted into the two small holes 36 a of the display board blank 36. The small hole 36a has a circular shape, whereas the foot 32b of the foot mark 30C has a regular square shape. For this reason, small holes 36a and gaps are generated at four locations around the foot 32B. When the foot 32b and the small hole 36a are fixed with the adhesive 37, the adhesive 37 flows into the gap and becomes a pool of the adhesive 37, and the adhesion of the foot 32b and the small hole 36a due to the pool of the adhesive 37. Increase strength.

  Further, the foot 32b of the foot mark 30C in this embodiment is formed by Ni metal electroforming. Accordingly, the material hardness of the legs 32b is higher than the material hardness of the display board blank 36 formed of brass, phosphor bronze, or white. If the outer diameter of the foot 32b is slightly larger than the inner diameter of the small hole 36a, the inner diameter portion of the small hole 36a is cut and inserted with the square corner (edge) of the foot 32b. In such a case, since the square corners (edges) of the legs 32b bite into the material of the display board blank 36, a stronger fixing strength can be obtained. In addition, there is an effect that the allowable range of the engagement dimensional accuracy between the small hole 36a and the foot 32b can be widened.

In this embodiment, the length of the foot 32b and the thickness of the display board blank 36 are made the same, and the foot 32b is fixed only by the bonding method. However, the length of the foot 32b is changed to the display board blank 36.
It is also possible to make the structure to be fixed by caulking the protruded foot 32b while making it longer than the thickness of and fixing with an adhesive. The fixing structure using the two methods of the adhesion method and the caulking method can obtain a very strong fixing force.

  The footing index 30C having the above-described forming method includes the formation of the electroforming mother die 20, the formation of the conductive metal film 31, the formation of the primary index blank 30A by electroforming plating, and the secondary by grinding. Since mass production such as formation of the index blank 30B and peeling of the secondary index blank 30B from the electroformed mother die 20 is possible, it can be manufactured at low cost.

  Further, since three-dimensional and various index shapes can be formed, a wide variety of indices can be obtained. Further, since it is glossy and various metal plating colors can be imparted, when it is attached to the display board, a noble metal feeling is born and the decoration feeling is increased, so that a display board with a sense of quality can be obtained.

  Further, since the indicator is firmly fixed, it can be used as a display plate for a high-pressure watch.

  Although the present embodiment has been described with reference to a watch index, the present invention can be applied to display plates other than watches, various nameplates, various nameplates and panels.

  Hereinafter, more detailed contents of the present invention will be described in the description of examples. First, a display indicator using a footing indicator and a footing indicator according to the first embodiment will be described with reference to FIGS. Here, FIG. 9 shows a plan view of the display board using the foot markers according to the first embodiment. FIG. 10 is an enlarged cross-sectional view of the main part of the portion D in FIG. 9, and FIG. 11 is a perspective view of the foot mark in FIG. 9 viewed from the foot side. 12 is a perspective view of an electroforming mother mold used to form the foot mark shown in FIG. 11, and FIG. 13 is a main configuration of an injection mold for forming the electroforming mother mold shown in FIG. The principal part sectional drawing of components is shown. FIG. 14 is an explanatory view for explaining the main process for forming the footing index shown in FIG. 11. FIG. 14 (a) is a process for forming a conductive metal film on the electroforming mother mold, and FIG. b) is a process of forming a primary index blank by electroforming, FIG. 14C is a process of forming a secondary index blank by grinding, and FIG. 14D is a process of forming a secondary index blank. The process which peeled from the electroforming mother mold is shown.

  The display board 55 according to the first embodiment is a display board for a watch, and as shown in FIG. 9, the display board blank 56 is provided with a footed indicator 50C indicating a wedge-shaped hour character. The display board blank 56 is formed of a phosphor bronze plate, and the surface thereof is finished with Ni plating and Ag plating with a satin pattern on the surface. In addition, a clear coating is applied to the Ag plating surface around 10 μm thick to prevent discoloration of Ag plating. Further, the display board blank 56 is provided with two round small holes 56a at a portion to which the foot mark 50C is attached, and the foot 52b of the foot mark 50C is fixedly attached to the small hole 56a.

  As shown in FIG. 11, the legged index 50C is composed of two legs 52b and an index body 52a. The index body 52a has a wedge shape in which one end is wide and the other end is narrow. The shape is made. In addition, the surface of the indicator main body 52a (which is the surface opposite to the surface with the feet 52b and which appears on the display board) has a rounded curved surface shape. The indicator main body 52a has a thickness of about 0.4 mm. The foot 52b has a regular quadrangular prism shape. The length of the foot 52b is about 0.55 mm. Further, the footing indicator 50C is made of Cu metal, and its surface is plated with Ni and Au. And it has a glossy surface.

This footing indicator 50C is formed using the electroformed mother die 40 shown in FIG. As shown in FIG. 12, the electroformed mother die 40 has a concave portion 41 at the center thereof, and the shape of the concave portion 41 is the same shape and the same size as the shape of the indicator main body 52a of the foot indicator 50C. The depth of the concave portion 41 is slightly larger than the total thickness of the footing indicator 50C. Further, the inner surface of the recess 41 is a glossy surface, and is glossed by transfer from a mirror-finished mold. The electroformed mother die 40 is made of ABS resin and is molded by an injection molding method.

  Hereinafter, a method of forming the footing indicator 50C will be described step by step. First, an injection mold for molding the electroformed mother mold 40 made of ABS resin is manufactured. The main components of the injection mold are a fixed mold 110 and a movable mold 100 as shown in FIG. The fixed mold 110 is fixed by being attached to a molding machine. The movable mold 100 moves in the direction indicated by the arrow, that is, the left-right direction, and moves forward and backward relative to the fixed mold 110. When the workpiece is formed, the workpiece moves forward, and as shown by the alternate long and short dash line R, it is brought into close contact with the fixed mold 110 and clamped. When the forming is completed, the workpiece moves backward, and a necessary distance is provided between the fixed mold 110 and the workpiece is carried out. The main components of the movable mold 100 are a cavity 101 and a core 102 disposed therein. The shape of the tip 102a of the core 102 is made to have the same shape as the shape of the index main body 52a of the foot mark 50C. On the other hand, the main component of the fixed mold 110 is a cavity 111. A space 112 is provided between the cavity 111 of the fixed mold 110 and the cavity 101 of the movable mold 100 when the fixed mold 110 and the movable mold 100 are clamped (in the state indicated by the constant chain line R). The space 112 is filled with resin through a gate (not shown in the figure), and the shape of the electroformed mother die 40 is formed. The outer shape of the electroforming mother mold 40 is determined by the cavity 111 of the fixed mold 110 and the cavity 101 of the movable mold 100, and the electroforming mother mold 40 is formed by the shape of the tip 102 a of the core 102 provided in the cavity 101 of the movable mold 100. The shape of the recess 41 is determined. When changing the size and shape of the footing index 50C, the core 102 on the movable mold 100 side may be changed. When changing the outer shape of the electroforming mother mold 40, the cavity 111 of the fixed mold 110 and the cavity 101 of the movable mold 100 are used. Change it. The core 102, the cavity 101 of the movable mold 100, and the cavity 111 of the fixed mold 110 have a replaceable structure so that they can be replaced. When the molding of the electroforming mother die 40 is finished, the movable die 100 is retracted. At that time, the electroforming mother mold 40 is separated from the cavity 111 of the fixed mold 110 while being attached to the cavity 101 side of the movable mold 100. The electroformed mother die 40 attached to the cavity 101 of the movable die 100 is pushed out by a knockout pin (not shown in the drawing) when the movable die 100 is stationary, and is detached from the movable die 100. The electroformed mother die 40 can be formed by manufacturing the mold having the above structure. The tip 102a of the core 102 of the first embodiment is formed in a wedge shape having the same roundness as the indicator main body 52a of the foot indicator 50C, and the surface is mirror-finished. In addition, it is also possible to make a plurality of picking structures so that a plurality of workpieces can be formed in the cavity 111 of the fixed mold 110 and the cavity 101 of the movable mold 100.

  The electroforming mother mold 40 is formed by pelletizing ABS resin, placing it in the hopper of the molding machine, melting the resin in the cylinder, and injecting the resin into the mold gate through the nozzle at the tip of the cylinder. Then, resin is filled into the space 112 formed by the cavity 111 of the fixed mold 110 and the cavity 101 of the movable mold 100 through the gate of the mold. As a result, the electroformed mother die 40 is formed. The removal of the electroforming mother mold 40 from the mold is as described above.

Next, a method of forming the foot mark 50C using the electroformed mother die 40 will be described with reference to FIG. First, as shown in FIG. 14A, a conductive metal film 51 is formed on the inner surface of the recess 41 of the electroforming mother mold 40. In Example 1, the conductive metal film 51 is formed from a Cu metal film, and is formed by a vacuum evaporation method. When performing vacuum deposition, the pressure at the time of vapor deposition in the chamber of the vacuum vapor deposition machine is 1 × 10 ^{−6 to} 5 × 10 ⁻⁵ torr (1.33 × 10 ^{−4 to} 6.65 × 10 ⁻³ Pa). In this range, pressure is appropriately set, and vapor deposition is performed until a predetermined film thickness is obtained. The film thickness is provided in the range of 0.2 to 1.0 μm. In addition, since it can form by methods, such as sputtering method and an ion plating method, as methods other than a vacuum evaporation method, it is good to select suitably. In addition, the electroconductive metal film 51 can be formed by an electroless plating method because the electroformed mother die 40 is formed of ABS resin. Although not shown, a conductive metal film connected to the conductive metal film 51 of the recess 41 is provided on a part of the upper surface 40a of the electroforming mother die 40 as an electrode for electroforming plating. The conductive metal film 51 in the recess 41 and the conductive metal film for electrodes are formed by depositing a deposited metal film and removing an unnecessary part by an etching method so that the conductive metal film is left only at a necessary part. Can do.

  Next, in FIG. 14B, a metal is deposited on the concave portion 41 of the electroforming mother die 40 by electroforming plating to provide an indicator blank 52 to form a primary indicator blank 50A. The primary index blank 50 </ b> A includes a conductive metal film 51 and an index blank 52. The index blank 52 is formed so as to be flush with the surface of the upper surface 40a of the electroformed mother die 40 in a state where the recess 41 is completely filled. The index blank 52 of Example 1 is made of Cu metal.

The electroforming plating method for forming the Cu metal index blank 52 is performed as follows. The composition of the plating bath solution is 240 to 250 g / l copper sulfate, 60 to 75 g / l sulfuric acid, and an appropriate amount of brightener, and electrolytic copper is used for the anode. The electroforming plating conditions are a bath temperature of 20 ° to 50 ° C., a voltage of 1 to 5 V, a current density of 5 to 35 A / dm ² , and a required time (until the recess 41 is filled) while stirring the bath liquid by the spray method.

  Next, in FIG. 14C, the primary indicator blank 50A is ground to form the legs 52b. As shown in FIG. 11, the shape of the foot 52b is a regular quadrangular prism. By forming the foot 52b, the index blank 52 is divided into a portion of the foot 52b and a portion of the index body 52a, and a secondary index blank 50B is formed. In addition, the grinding process simultaneously processes not only the primary index blank 50A but also the electroformed mother die 40 together. The grinding method is performed by the method described in the above embodiment.

  Next, when the leg 52b is formed and the secondary index blank 50B is obtained, the secondary index blank 50B is peeled from the electroformed mother die 40 as shown in FIG. In Example 1, in the first embodiment, the electrocast mother mold 40 is softened by applying heat of 80 ° to 120 °, and when the softened state, the secondary index blank 50B and the electroformed mother mold 40 are separated. Are taking the way. It can be peeled off easily and cleanly. Note that the peeling method is not limited to this heating method, and a method in which the electroformed mother die 40 is melted with a solvent such as acetone and peeled can also be used. As for the shape of the index main body 52a of the peeled secondary index blank 50B, the shape of the concave portion 41 of the electroformed mother die 40 is transferred, and a wedge-shaped one having the same round shape as the concave portion 41 is obtained. Further, the glossy surface of the recess 41 is transferred, and a glossy surface is obtained on the indicator main body 52a.

  Finally, finish plating is performed on the peeled secondary index blank 50B. The finish plating is Au plating after Ni plating. A foot index 50C having a gold metal color tone is obtained.

  The foot marking 50C formed by the above forming method has a thickness and a three-dimensional appearance, and since a glossy tone of gold with a roundness appears, a noble metal feeling appears and gives a high-class feeling. Further, the rounded curved surface shape of the head 52a of the footing indicator 50C has been difficult to form in the prior art, but can be made possible by taking the forming method of the present invention.

As shown in FIG. 10, the display board blank 56 and the footing indicator 50C are attached by inserting the two feet 52b of the footing indicator 50C into the two small holes 56a of the display board blank 56, as shown in FIG. 57 is applied and the foot 52b is bonded and fixed to the small hole 56a. Further, the tip of the foot 52b is crushed and crushed, and caulking 52d is performed around the small hole 56a. The foot 52b that protrudes to the back surface of the 0.4 mm-thick display board blank 56 is struck and swaged. Since the regular square foot 52b is inserted into the circular small hole 56a, a gap is formed between the small hole 56a and the leg 52b. The adhesive 57 flows into and accumulates in the gap, and the adhesive 57 accumulates, whereby a strong adhesive strength can be obtained between the legs 52b and the small holes 56a. Further, since the feet 52b are crimped, an even stronger fixing strength can be obtained.

  Further, the method of forming the footing index 50C includes the formation of the electroforming mother die 40, the formation of the conductive metal film 51, the formation of the primary index blank 50A by electroforming plating, and the secondary index blank 50B by grinding. The formation method that can be mass-produced, such as forming the second index blank 50B from the electroformed mother die 40, is employed, and since the number of steps is small, the footing index 50C can be manufactured at a low cost. Get. In addition, by replacing the fixed mold cavity and movable mold cavity of the molding die, various sizes of electroformed mother molds can be formed, and by changing the movable mold core, various molds can be formed. A shape footing indicator can be formed. There is no need to make each independent mold according to the size of the electroforming mother mold or the shape of the footing indicator, and only a pair of cavities and cores of movable and fixed molds are prepared. Can respond. An effect of reducing the cost of the molding die is also obtained.

  Next, a footstep indicator according to the second embodiment of the present invention will be described with reference to FIGS. Here, FIG. 15 shows a perspective view of the foot indicator according to the second embodiment as viewed from the foot side. FIG. 16 is a perspective view of an electroforming mother mold used to form the footing index shown in FIG. 15, and FIG. 17 is an explanatory diagram for explaining the main process for forming the footing index shown in FIG. 17A is a process of forming a conductive metal film on an electroforming mold, FIG. 17B is a process of forming a primary index blank by electroforming plating, and FIG. 17C is a grinding process. The process of forming the secondary index blank by machining, (d) of FIG. 17 shows the process of peeling the secondary index blank from the electroforming mother mold.

  As shown in FIG. 15, the foot index 70C according to the second embodiment is composed of two legs 72b and an index body 72a, and is formed of Ni metal, and finish-plated to form an Rh metal film. Provided.

  The foot mark 70C is formed using an electroformed mother die 60 shown in FIG. As shown in FIG. 16, the electroformed mother die 60 is provided with a concave portion 61 at the center thereof, and the shape of the concave portion 61 is the same shape and the same size as the shape of the indicator main body 72 a of the foot indicator 70 </ b> C. . The depth of the recess 61 is slightly larger than the total thickness of the foot mark 70C, and the inner surface of the recess 61 is a glossy surface. The electroformed mother die 60 is made of ABS resin and is molded by an injection molding method.

  The footing indicator 70C is formed through the process shown in FIG. First, in FIG. 17A, a conductive metal film 71 is formed on the inner surface of the recess 61 of the electroforming mother mold 60. In Example 1, the conductive metal film 71 is formed of a Ni metal film and is formed by an electroless plating method. Although not shown, a conductive metal film connected to the conductive metal film 71 of the recess 61 is provided for a part of the upper surface 60a of the electroforming mother die 60 for the electrode.

  Next, in FIG. 17B, a first index blank 70 </ b> A is formed by providing a metal index blank 72 by depositing metal at the concave portion 61 of the electroforming mother mold 60 by electroforming plating. The index blank 72 is formed so as to be flush with the surface of the upper surface 60a of the electroforming mother die 60 in a state where the recess 61 is completely filled. The index blank 72 of Example 2 is made of Ni metal.

The electroforming plating method for forming the Ni metal index blank 72 is performed as follows. The composition of the electroforming bath solution is nickel sulfamate 300 to 450 g / l, nickel chloride 10 to 3
It consists of 0 g / l, boric acid 20-40 g / l, an appropriate amount of brightener, and pit inhibitor (such as sodium laurate) 0.4 g / l, and ph is 3-5. Nickel is used for the anode. The plating conditions are a bath temperature of 40 ° to 60 ° C., a voltage of 6 to 8 V, and a current density of 10 to 25 A / dm ^{2. The} plating is performed for a required time (until the recess 61 is filled) while stirring the bath liquid by the spray method.

  Next, in FIG. 17C, the primary index blank 70A is ground to form the legs 72b. By forming the foot 72b, the index blank 72 is divided into a portion of the foot 72b and a portion of the index body 72a, and a secondary index blank 70B is formed. The grinding process simultaneously processes not only the primary index blank 70A but also the electroformed mother die 60 at the same time. The grinding method is performed by the method described in the above embodiment.

  Next, when the leg 72b is formed and the secondary index blank 70B is obtained, the secondary index blank 70B is peeled off from the electroformed mother die 60 as shown in FIG. In Example 2, the peeling method is the same method as in Example 1 described above, and heat is applied to the electroforming mold 60 by heating at 80 ° to 120 ° to soften the secondary index. A method of separating the blank 70B and the electroformed mother die 60 is employed. It can be peeled off easily and cleanly. The shape of the indicator main body 72a of the peeled secondary indicator blank 70B is obtained by transferring the shape of the concave portion 61 of the electroforming mother die 60, and the indicator main body 72a having slopes taken on both sides of the same width as the shape of the concave portion 61. can get. In addition, the glossy surface of the recess 61 is transferred to obtain a glossy surface on the indicator main body 72a.

  Lastly, the peeled secondary index blank 70B is subjected to finishing Rh metal plating to obtain a footing index 70C.

  The foot marking 70C formed by the above forming method has a thickness and a three-dimensional appearance, and since a glossy tone of white Rh metal appears, a noble metal feeling appears and gives a high-class feeling.

  Next, a footing index and a display board using the footing index according to the third embodiment of the present invention will be described with reference to FIGS. Here, FIG. 18 shows a plan view of a display board using a foot mark according to the third embodiment of the present invention. 19 is a perspective view seen from the foot side of the footing index in FIG. 18, FIG. 20 is a cross-sectional view of the main part in FIG. 18, and FIG. 21 is a process explanatory view for explaining a manufacturing method of the footing index in FIG. 21A is a process of forming a conductive metal film on the electroforming mother mold, FIG. 21B is a process of forming a primary index blank by electroforming plating, and FIG. 21C is a process of FIG. FIG. 21D is an explanatory diagram for explaining the step of forming the secondary index blank by grinding, and the step of peeling the secondary index blank from the electroforming mother mold.

  As shown in FIG. 18, the display board 95 according to the third embodiment is a nameplate in which a display mark blank 90 c formed by fringing a flower pattern pattern with irregularities is attached to a display board blank 96. The legged indicator 90C forming the cherry blossom pattern is made of Ni metal, and the surface of the irregular cherry blossom pattern is gold-plated to give it a glossy golden tone. The display blank 96 is made of an Al plate, but the surface is painted.

  FIG. 19 is a perspective view of a legged indicator 90C having a cherry blossom pattern as viewed from the foot side. The legged indicator 90C is composed of one leg 92b and an index body 92a. The foot 92b here has a long rectangular shape.

Here, as shown in FIG. 20, the attachment structure between the foot mark 90C and the display board blank 96 is a long square hole 96a having the same shape as the long square foot 92b of the foot mark 90C. The foot 92b of the foot mark 90C is inserted into the hole 96a and fixed through the adhesive 97. The adhesive 97 is provided not only on the engaging portion between the hole 96a and the foot 92b but also on the back side of the indicator main body 92a, and has a structure in which the back surface of the indicator main body 92a and the upper surface of the display board blank 96 are adhered and fixed. . Since the foot 92b and the hole 96a have a long rectangular shape, there is no fear that the footed indicator 90C rotates.

  The footing indicator 90 </ b> C is formed using an electroformed mother die also in the third embodiment. Hereinafter, a method of forming the foot mark 90C will be described with reference to FIG. In FIG. 21A, reference numeral 80 denotes an electroformed mother mold. The electroformed mother die 80 has a concave portion 81 at the center thereof, and the concave portion 81 is formed by forming the same shape as the indicator main body 92 a of the foot indicator 90 C having a cherry blossom pattern on the bottom surface of the concave portion 81. . Further, the depth of the concave portion 81 is slightly deeper than the total thickness of the legged indicator 90C. In the third embodiment, the electroforming mold 80 is made of an acrylic resin, and is formed by an injection molding method using an injection mold. The concavo-convex pattern of the cherry blossom pattern formed on the bottom surface of the concave portion 81 of the electroformed mother die 80 is formed by transferring from the mold. Further, the inner surface of the recess 71 is finished with a glossy surface by transfer from a mirror-finished mold.

A conductive metal film 91 is formed on the inner surface of the recess 81 of the electroformed mother die 80 having such a shape. In Example 3, the conductive metal film 91 is formed of a Cu metal film, and is formed by a vacuum evaporation method. When performing vacuum deposition, the pressure at the time of vapor deposition in the chamber of the vacuum vapor deposition machine is 1 × 10 ^{−6 to} 5 × 10 ⁻⁵ torr (1.33 × 10 ^{−4 to} 6.65 × 10 ⁻³ Pa). In this range, pressure is appropriately set, and vapor deposition is performed until a predetermined film thickness is obtained. In addition, since it can form by methods, such as sputtering method and an ion plating method, as methods other than a vacuum evaporation method, it is good to select suitably. In Example 3, the electroformed mother die 80 was formed of an acrylic resin. Since the acrylic resin cannot be directly wet-plated, the conductive metal film is formed by a dry plating method such as a vacuum deposition method. When the electroforming mold 81 is formed of ABS resin or the like that can be wet-plated directly, the conductive metal film can be formed even by an electroless plating method. Although not shown, a conductive metal film connected to the conductive metal film 91 of the recess 81 is provided on a part of the upper surface 80a of the electroforming mother die 80 for an electrode for performing electroforming plating.

  Next, in FIG. 21B, electroforming plating is performed, Ni metal is deposited at the concave portion 81 of the electroforming mother die 80 to form the indicator blank 92, and the primary indicator blank 90A is formed. . The index blank 92 is formed so as to be flush with the surface of the upper surface 80a of the electroformed mother die 80 in a state where the concave portion 81 is completely filled. Electroforming plating is performed using the same plating bath composition as in Example 2 described above.

  Next, in FIG. 21C, the primary index blank 90A is ground to form the legs 92b. By forming the foot 92b, the indicator blank 92 is divided into a portion of the foot 92b and a portion of the indicator body 92a, and a secondary indicator blank 90B is formed. The grinding process simultaneously processes not only the primary index blank 90A but also the electroformed mother die 80 at the same time. The grinding process is performed by the method described in the above embodiment.

  Next, when the leg 92b is formed and the secondary index blank 90B is obtained, the secondary index blank 90B is peeled from the electroformed mother die 80 as shown in FIG. The peeling method is a method in which heat is applied to the electroforming mold 80 by applying heat of 80 ° to 120 °, and the secondary index blank 90B and the electroforming mold 80 are separated when the softening state is obtained. . It can be peeled off easily and cleanly. The shape of the concave portion 81 of the electroformed mother die 80 is transferred to the indicator main body 92a of the peeled secondary indicator blank 90B to form an uneven cherry blossom pattern. Further, the glossy surface of the recess 81 is transferred to the surface of the indicator main body 92a to obtain a glossy surface.

Finally, a finished Au metal plating is performed on the peeled secondary indicator blank 90B to obtain a footing indicator 90C. By taking such a manufacturing method, a footing indicator having a cherry blossom pattern having a glossy golden color tone can be obtained. A noble metal feeling is obtained, a glossy and smooth surface is obtained, and a very beautiful index is obtained.

  In Example 3, one foot 92b of the foot mark 90C is formed in a long square shape. Moreover, the hole 96a of the display panel blank 96 of the other party to which this leg 92b is attached also took the shape of a long square hole. By adopting such a shape, when the foot is attached, the indicator is firmly fixed without rotating on the display board blank 96. In Example 3, the index was fixed to the display board plank using an adhesive, but in some cases, it is possible to further squeeze the foot.

  In the third embodiment, the cherry blossom pattern is selected as the index pattern, but various other patterns can be selected and formed. It is possible to form an index of a desired shape such as a number, a letter, a symbol, a geometric pattern, a picture pattern, or a photographic pattern. An index with high decorativeness can be obtained by coloring with plating or the like.

  In addition, since the number of processing steps is small and a manufacturing method capable of mass production in any of the steps is used, an inexpensive index can be obtained.

  In the first and second embodiments, the circular small holes are provided to attach the foot markers to the display board blank. However, it goes without saying that the same small holes as the legs may be used.

It is the perspective view seen from the leg side of a foot indicator which concerns on an embodiment of the present invention. FIG. 2 is a perspective view of an electroformed mother die used for forming the foot mark shown in FIG. 1. FIG. 3A is an explanatory view for explaining a forming method until a secondary index blank of a footing index is formed using the electroformed mother mold shown in FIG. 2, and FIG. 3 (b) is a cross-sectional view of the first index plank formed by electroforming plating, and FIG. 3 (c) is a second index blank formed by grinding. It is sectional drawing. It is a description perspective view explaining the procedure of the grinding process in FIG.3 (c). It is explanatory drawing when peeling the 2nd parameter | index blank shown to (c) of FIG. 3 from an electroforming mother mold. It is a perspective view of the secondary index blank shown in FIG. It is a top view of the display board for timepieces using the leg indicator which concerns on this embodiment. 8A and 8B are a cross-sectional view and a rear view of a main part of a portion D in FIG. 7, in which FIG. 8A is a main part cross-sectional view and FIG. 8B is a rear view. FIG. 3 is a plan view of a display board using a foot indicator according to the first embodiment. It is a principal part cross-sectional enlarged view of the D section in FIG. It is the perspective view seen from the foot | leg side of the indicator with a foot in FIG. FIG. 12 is a perspective view of an electroforming mother die used for forming the foot mark shown in FIG. 11. It is principal part sectional drawing of the main components of the injection mold for shape | molding the electroforming mother mold shown in FIG. FIG. 14A is an explanatory diagram for explaining a main process for forming the footing index shown in FIG. 11. FIG. 14A is a process for forming a conductive metal film on an electroforming mother mold, and FIG. 14B is an electroforming process. The process of forming the primary index blank by plating, FIG. 14C shows the process of forming the secondary index blank by grinding, and FIG. 14D shows the secondary index blank from the electroformed mother die. It is explanatory drawing explaining the process which peeled. It is the perspective view seen from the foot side of a foot indicator which concerns on Example 2. FIG. FIG. 16 is a perspective view of an electroforming mother die used for forming the foot mark shown in FIG. 15. FIGS. 17A and 17B are explanatory views for explaining main steps for forming the footing index shown in FIG. 15. FIG. 17A is a step of forming a conductive metal film on the electroforming mother mold, and FIG. The process of forming the primary index blank by plating, FIG. 17 (c) is the process of forming the secondary index blank by grinding, and FIG. 17 (d) is the secondary index blank from the electroforming mother mold. It is explanatory drawing explaining the process which peeled. It is a top view of the display board using the foot indicator which concerns on Example 3 of this invention. It is the perspective view seen from the leg side of a foot indicator in FIG. It is principal part sectional drawing in FIG. FIG. 21A is a process explanatory diagram for explaining a method for manufacturing a foot mark in FIG. 18, FIG. 21A is a process in which a conductive metal film is formed on an electroforming mother mold, and FIG. The process of forming the primary index blank, FIG. 21 (c) is the process of forming the secondary index blank by grinding, and FIG. 21 (d) is the process of peeling the secondary index blank from the electroforming mold. It is explanatory drawing explaining these. It is a perspective view of the typesetting which is a footing index shown in patent documents 1. It is the longitudinal cross-sectional view of the cutting die and material which showed the production method of the typesetting shown by FIG. It is an expanded sectional view which shows the structure of the place which fixed the typesetting to the timepiece display board.

Explanation of symbols

20, 40, 60, 80 Electroforming mold 20a, 40a, 60a, 80a Upper surface 21, 41, 61, 81 Recess 30A, 50A, 70A, 90A Primary index blanks 30B, 50B, 70B, 90B Secondary index Blanks 30C, 50C, 70C, 90C Footing indicators 31, 51, 71, 91 Conductive metal coatings 32, 52, 72, 96 Indicator blanks 32a, 52a, 72a, 92a Indicator bodies 32b, 52b, 72b, 92b Feet 35, 55, 95 Display board 36, 56, 96 Display board blank 36a, 56a Small hole 37, 57, 97 Adhesive 96a Hole 100 Movable mold 101, 111 Cavity 102 Core 102a Tip 110 Fixed mold 112 Space

Claims (21)

A primary index blank formed by electroforming plating using a resin electroforming mold is ground or cut to form a secondary index blank provided with index legs, and then the first index blank is formed. A footing index, wherein a secondary index blank is formed by peeling off from the electroformed mother die. 2. The foot mark according to claim 1, wherein the foot of the mark has a quadrangular cross section. The footing index according to claim 1, wherein the electroforming mother mold is made of a resin to which a plating metal adheres by a wet plating method. The footing indicator according to claim 1 or 3, wherein the electroforming mother mold is made of ABS resin. The footing indicator according to any one of claims 1, 3, and 4, wherein a conductive metal coating is provided on the electroforming mother die. 6. The footing indicator according to claim 5, wherein the conductive film is made of at least one metal selected from silver, copper, and nickel. 2. The foot mark according to claim 1, wherein the secondary index blank is peeled from the electroformed mother mold by subjecting the electroformed mother mold to a heat treatment. 2. The foot according to claim 1, wherein the secondary index blank is peeled off from the electroformed mother die by immersing the electroformed mother die in an organic solvent and dissolving the electroformed mother die. Index attached. The footing indicator according to claim 1 or 2, wherein the secondary indicator blank is subjected to finish plating after the secondary indicator blank is peeled off from the electroforming mold. A process for producing an injection mold for forming an electroforming mold; and
Forming an electroformed mother die made of resin by an injection molding method using the mold;
Forming a conductive metal film on the electroforming mold; and
Forming a primary index blank by performing thick plating on the electroforming mold by an electroforming plating method;
Forming a secondary index blank provided with index legs on the primary index blank by a grinding method or a cutting method;
Peeling the secondary index blank from the electroforming matrix;
A step of performing finish plating on the secondary index blank peeled from the electroforming mold;
A method for producing a footing index characterized by comprising: The method for manufacturing a foot mark according to claim 10, wherein the foot of the mark has a quadrangular cross section. The method for manufacturing a foot mark according to claim 10, wherein the electroforming mother mold is made of a resin to which a plating metal adheres by a wet plating method. The method of manufacturing a foot mark according to claim 10 or 12, wherein the electroformed mother die is made of an ABS resin. 11. The footing indicator according to claim 10, wherein in the step of forming the secondary indicator blank, the electroforming mother die is ground or cut simultaneously with grinding or cutting of the indicator foot. Manufacturing method. The index foot processing is performed by grinding or cutting, a first processing step for processing the total thickness including the index main body and the foot, a second processing step for processing the X direction or the Y direction of the foot, and the second 15. The processing according to claim 10, wherein the processing is performed in three steps including a third processing step of processing the X direction or the Y direction of the foot that has not been processed in the processing step. Method of manufacturing the footstep indicator. The said conductive film consists of at least 1 sort (s) of the metal which consists of silver, copper, and nickel, The manufacturing method of the foot parameter | index of Claim 10 characterized by the above-mentioned. The method of manufacturing a foot mark according to claim 10, wherein the peeling of the secondary index blank from the electroformed mother mold is performed by subjecting the electroformed mother mold to a heat treatment. The foot according to claim 10, wherein the peeling of the secondary index blank from the electroformed mother die is performed by immersing the electroformed mother die in an organic solvent and dissolving the electroformed mother die. Manufacturing method of attached index. A display board to which a footing indicator is attached, wherein the footing indicator according to any one of claims 1 to 9 is attached via an adhesive. A display board to which a footing index is attached, wherein the footing index formed by the method for manufacturing a footing index according to any one of claims 10 to 18 is attached via an adhesive. Characteristic display board. 21. The display board according to claim 19 or 20, wherein a foot of the footing indicator is crimped to the display board.

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