JP2005265588A - Manufacturing method of dial for clock and dial for clock manufactured using the method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To produce at low cost a dial for clock with elegant geometrical relief pattern. <P>SOLUTION: A resin thin film 102 with a relief pattern is formed by spreading molding resin and curing on a female pattern mold 130 with relief pattern manufactured by forming a male pattern matrix 120 having a relief pattern into an extrusion mold. Then the resin thin film 102 is bonded with a dial base plate 101 using an adhesive agent 103 and the resin thin film 102 is transferred on the dial base plate 101 by removing the female pattern 130. Thus, an elegant geometrical pattern can be added on a smooth dial base plate 101 easily with 100% rate of transferring. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a timepiece dial manufacturing method and a timepiece dial manufactured using the manufacturing method.

Of the dials for timepieces that are the technical field of the present invention, there are roughly three methods for producing a dial with a high-class feeling having a concavo-convex pattern on the surface. That is, 1) an electroforming method, 2) a pressing method, and 3) an injection molded product bonding method. Hereinafter, the background art will be described with reference to FIGS. 5 is a perspective view of a dial plate with an index in which the dial manufactured by the background technologies 1, 2, and 3 is provided with an index, and FIG. 6 is B of the dial plate with the index of FIG. -B sectional view, FIG. 7 is an enlarged sectional view of a portion P in FIG. 6, and FIG.

  As with other general dials, a high-quality watch dial having a concavo-convex pattern on the surface has a concavo-convex pattern on the substantially flat dial 1 as shown in FIGS. A center hole 2 with a press or a small hole for fixing a time character in some cases, and an index 3 made of metal or plastic, such as a time character or a mark, is attached or fixed with caulking etc. As built into the watch. In order to produce a high-quality watch dial 1 having a concavo-convex pattern on the surface, a dial 11 manufactured by an electroforming method (electroforming) described as Background Art 1 has a cross-sectional shape shown in FIG. The electroforming method is to prepare in advance a plating mold having a concavo-convex pattern to be provided on the surface of the dial, and use the electroforming method to plate the entire dial plate including the concavo-convex pattern on the surface of the plating mold. In this method, the dial 11 is finished by applying post-processing such as the foot 11a to the plating film after the film is formed.

  The cross-sectional shape of the dial manufactured by the pressing technique of Background Art 2 is the same as that of the electroforming technique shown in FIG. The pressing method is to prepare a press mold with a concavo-convex pattern to be provided on the dial surface, transfer the concavo-convex pattern onto the metal plate that will be the material of the dial plate using a press machine, and thereafter It is a method that finishes the dial after processing.

  In the case of a dial made by the injection molded product bonding method shown as the background art 3, it has a cross-sectional shape enlarged in FIG. The injection molding product laminating method is to prepare an injection mold provided with a concavo-convex pattern, and apply the adhesive 25 on the surface of the dial substrate 24 with the decorative board 23 with the concavo-convex pattern formed by injection molding using this mold. After sticking using, it is a method of removing an excessive protrusion part by post-processing by using a press machine.

  Dials manufactured by the methods of Background Art 1 to 3 are subjected to surface treatment such as vapor deposition or clear coating as necessary, and then a center hole or a small hole for fixing the time character in some cases with a press or the like. An index made of metal or plastic, such as time letters and marks, is pasted or fixed with caulking or the like to complete a dial with an index as shown in FIG.

  In the case of a conventional electroforming method, thick plating is required, and thus electroforming takes time. Also post-processing is necessary. Also, in the case of the press method, the transfer rate of the uneven pattern from the press die to the metal plate is poor, and it is difficult to make the transfer rate 98% or more, and the design intended by the designer is faithfully reflected. difficult. Further, in the case of the dial plate manufactured by the injection molding product laminating method shown in FIG. 8, the L dimension of the decorative plate 23 with the uneven pattern becomes as thick as 0.4 to 0.6 mm, which has a problem in design design. .

  The present invention solves these problems, and inexpensively manufactures a dial with a geometric pattern having high-quality concavo-convexities, and a resin thin film having a thin concavo-convex pattern that has never existed, and many types It is an object to provide a foundation for creating a new design dial plate that has never existed before by combining the dial substrates using the above materials.

  The present invention has been made to solve the above problems. As a means for solving the problem, the invention according to claim 1 of the present invention is a method in which a modeling resin is coated on a female pattern mold having a concavo-convex pattern produced by using a male pattern matrix provided with a concavo-convex pattern as an injection mold. After forming a resin thin film having a concavo-convex pattern by curing, the resin thin film is adhered to the dial substrate using an adhesive, and then the female pattern mold is peeled off to form the resin thin film on the dial substrate. A method for manufacturing a timepiece dial, wherein a resin thin film is transferred.

  In the invention according to claim 2 of the present invention, polypropylene (PP) resin is used for the female pattern mold, and epoxy resin, urethane resin, or acrylic resin is used for the resin thin film. It is a manufacturing method of the timepiece dial characterized by the above.

  According to a third aspect of the present invention, there is provided a timepiece dial manufacturing method, wherein the resin thin film has a thickness of about 0.1 mm.

  The invention according to claim 4 of the present invention is a timepiece dial manufacturing method, characterized in that the molding resin is sprayed and applied.

  The invention according to claim 5 of the present invention is a timepiece dial manufacturing method using a rubber, thermosetting, or UV curable adhesive as the adhesive.

  The invention according to claim 6 of the present invention is a timepiece dial manufactured by using the manufacturing method according to any one of claims 1 to 5.

  As an effect of the invention, by using the invention according to claim 1, it becomes possible to add a geometric pattern having high-quality unevenness on the dial at low cost. In addition, it has become possible to design a new design dial that has never existed before.

  By using the resin material according to claim 2, liquid resin thin film material can be easily resinized along the uneven surface of the female pattern mold, and after the resin thin film material is cured, the female pattern mold and the resin thin film are It was made possible to peel easily.

  Since the resin thin film according to the third aspect is extremely thin, the surface of the dial plate substrate can be easily seen through, and the degree of freedom in designing the dial design has been expanded.

  In the invention of claim 4, the resin thin film forming method is specified as spray coating. By using this method, a suitable resin thin film can be formed.

  In the invention according to claim 5, the adhesive is specified. By using these adhesives, it is possible to easily transfer and maintain a sufficient adhesive force.

  The invention according to claim 6 of the present invention is a dial manufactured by the manufacturing method according to claims 1 to 5 of the present invention, and it has become possible to provide a cheap and high-quality dial.

  Next, the best mode for carrying out the present invention will be described. 1 to 4 are used to describe the best mode for carrying out the present invention (hereinafter abbreviated as an embodiment). FIG. 1 is a perspective view of a dial plate with an index in which various indexes are attached to the dial plate of the present invention, FIG. 2 is an enlarged cross-sectional view of the index dial plate of FIG. FIG. 3A shows a first embodiment, and FIG. 3B shows a second embodiment. FIG. 4 is an explanatory view of the process of processing the dial of the present invention. FIG. 4 (a) shows a male pattern mother mold provided with an uneven pattern, and FIG. 4 (b) shows a male pattern mother mold as an injection mold. 4 (c) shows the process of forming a resin thin film having a concavo-convex pattern on the upper surface of the female pattern mold, and FIG. 4 (d) shows the resin thin film mold. FIG. 4 (e) shows a completed state of the timepiece dial plate from which the female pattern mold has been peeled off.

First, the configuration of the dial of the present invention will be briefly described, and then the manufacturing method thereof will be described in detail. FIG. 1 shows a perspective view with an index on the dial of the present invention, and FIG. 2 shows a part of the dial 100 in an enlarged sectional view. A resin thin film 102 is attached to the upper surface with an adhesive 103 to complete. As shown in FIG. 4, the manufacturing process of the dial 100 of the present invention is generally performed by molding resin on a female pattern mold 130 having a concavo-convex pattern produced by using a male pattern mother mold 120 provided with a concavo-convex pattern as an injection mold. A resin thin film 102 having a concavo-convex pattern is formed by attaching the resin thin film 102 onto the dial plate substrate 101 with an adhesive 103, and then the female pattern mold 130 is peeled off. The resin thin film 102 is transferred to the surface.

  FIG. 4A shows a schematic cross-sectional view of the male pattern matrix 120. The male pattern mother mold is made of an iron-based metal as a mold material, and an uneven pattern to be imparted to the dial surface is engraved on the surface of the mold material, and is manufactured by cutting.

  The female pattern mold 130 shown in FIG. 4B was manufactured by injection molding a resin material using the male pattern matrix 120 as a mold. Therefore, in the female pattern mold 130, a concave portion is formed at a portion corresponding to the mountain of the male pattern matrix 120, and a convex portion is formed at a portion corresponding to the valley of the male pattern matrix 120. As the molding resin, polypropylene (PP), which is a thermoplastic engineering plastic, was used. The thickness of the female pattern mold 130 after molding is about 0.5 mm.

Next, as shown in FIG. 4C, a resin thin film 102 having a concavo-convex pattern was formed on the upper surface of the female pattern mold 130 using a modeling resin. A transparent urethane-based resin was used as a modeling resin as a material for the resin thin film 102. A coating film is formed by spraying liquid modeling resin on the surface of the concavo-convex pattern of the female pattern mold 130 while controlling the spraying amount, and then the coating resin is irradiated with far infrared rays. Was cured. The thickness L1 of the cured resin thin film 102 is about 0.1 mm.

  When the resin thin film 102 having a concavo-convex pattern is formed on the female pattern mold 130 with the modeling resin, as shown in FIG. 4D, the adhesive 103 is applied to the resin thin film side of the female pattern mold 130 with the resin thin film. The dial substrate 101 is adhered after being applied. The dial substrate 101 had a thickness L2 of 0.2 mm phosphor bronze plate provided with legs. A UV curable type was used as the adhesive 103. After the female pattern mold 130 with the resin thin film and the dial plate substrate 101 are bonded together while being aligned, the adhesive pattern 103 is cured by irradiating ultraviolet rays, and then the female pattern mold 130 is peeled off, whereby FIG. As shown in (e), the resin thin film 102 is transferred onto the dial substrate 101.

  By producing a timepiece dial using the above method, it is possible to easily add a geometric pattern with high-quality irregularities on a smooth dial substrate at a transfer rate of 100%. became. Since a time-consuming electroforming process is not required, it can be manufactured at a low cost, and since the transfer rate is 100%, it is possible to make a timepiece with a new design that is difficult to achieve by injection molding. In addition, it is also possible to form an index simultaneously if necessary.

  The shapes, materials, processing methods, and the like of the component parts used in the description of the “embodiments of the present invention” are not limited to these. In the “embodiment of the present invention”, a cut mold is used as the male pattern mother mold 120, but it is also possible to manufacture by using etching. In addition to the PP used in the “embodiment of the present invention”, the female pattern mold 130 is made of a cycloolefin polymer (abbreviated as COP resin. As a trade name, ZEONOR of Nippon Zeon Co., Ltd.), soft There is acrylic (Kuraray Parapet). The optimum material may be selected in consideration of the manufacturing cost. Since the female pattern mold 130 requires appropriate rigidity and flexibility, the thickness must be 0.5 mm or more in any case.

  The material of the resin thin film 102 may be an epoxy resin or an acrylic resin in addition to the urethane resin used in the “embodiment of the present invention”. In the “embodiment of the present invention”, a UV curable resin is used as the adhesive 103, but a rubber or thermosetting adhesive may be used. Since the adhesive only secures the adhesive force and is applied thinly, if there is a gap between the dial plate substrate 101 and the resin thin film 102 and it is inconvenient, the resin may be filled in advance.

The thickness L2 of the phosphor bronze plate used for the dial substrate 101 is suitably about 0.1 to 0.5 mm. Further, as shown in FIG. 3A, a precious stone 105 (shellfish or the like) may be embedded in the surface of the dial substrate 104 to give a higher-class feeling. As shown in FIG.
There is a case where a step (or inclination) is provided on the dial substrate surface to enhance the three-dimensional effect. In this case, the male pattern matrix 120 may be manufactured according to the dial substrate 106 surface.

  The dial plate manufactured by the above processing method may be finally painted as a surface treatment by depositing a metal film 107 such as gold as shown in FIG.

  The method for manufacturing a timepiece dial according to the present invention has been described in several embodiments. By taking the manufacturing method according to the present invention, a geometric pattern having high-quality unevenness can be easily added to the dial. It became possible. In addition, there are no restrictions on the material of the base material, and all materials that can be combined with metal, precious stones, shellfish, and other dials can be targeted, and since the thin film is thin, the pattern of the substrate appears well, making it easier to create new designs .

  Thus far, a novel method for manufacturing a timepiece dial has been described. The present invention exhibits its effect in the production of timepiece dials, but the use of the present invention is not limited to timepieces. The present invention basically exhibits the same effect in a dial plate used in all industrial and consumer instrument measuring instruments produced in a certain amount.

It is a perspective view of the dial plate with an index | index which attached | subjected the various parameter | index to the dial of this invention. It is a B arrow expanded sectional view in the P section of the dial plate with an index of FIG. In the embodiment of the present invention, FIG. 3 (a) shows the first embodiment and FIG. 3 (b) shows the second embodiment. It is explanatory drawing processing process of the dial of this invention. It is a perspective view of the dial plate with a parameter | index which attached | subjected the parameter | index to the dial plate manufactured by background art 1,2,3. It is BB sectional drawing of the dial plate with an index | index of FIG. It is the P section expanded sectional view in FIG. It is an expanded section in the P section equivalent part in background art 3.

Explanation of symbols

1, 11, 100 Dial 3 Index 10, 200 Dial with index 24, 101, 104, 106 Dial substrate 25, 103 Adhesive 102 Resin thin film 105 Precious stone 120 Male pattern master 130 Female pattern

Claims (6)

After forming a resin thin film with a concavo-convex pattern on a female pattern mold with a concavo-convex pattern produced by using a male pattern matrix with a concavo-convex pattern as an injection mold, an adhesive is formed The resin thin film is bonded to the dial plate substrate using a tape, and then the resin thin film is transferred onto the dial plate substrate by peeling off the female pattern mold. . The timepiece dial according to claim 1, wherein a polypropylene (PP) resin is used for the female pattern mold, and an epoxy resin, a urethane resin, or an acrylic resin is used for the resin thin film. Manufacturing method. 3. The timepiece dial manufacturing method according to claim 1, wherein the resin thin film has a thickness of about 0.1 mm. The method for manufacturing a timepiece dial according to claim 1, wherein the modeling resin is sprayed and applied. The timepiece dial manufacturing method according to claim 1, wherein a rubber mold, a thermosetting type, or a UV curable adhesive is used as the adhesive. A timepiece dial manufactured using the manufacturing method according to claim 1.

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