JP2019058406A - Method of forming watch band, mold and method of manufacturing the same - Google Patents

Abstract

A leather-like and seam-like uneven pattern and an uneven pattern for skin contact alleviation can be shaped efficiently and with high transferability on the front and back surfaces of a wristwatch band during injection molding. A leather-like and seam-like unevenness is formed on the surface of a wristwatch band by transferring at the time of injection molding a leather-like and seam-like reversal unevenness 16 formed by electroforming in a first insert 13 of a first split mold 10. A pattern is shaped, and the reverse asperity 25 for skin adhesion relaxation formed on the second insert 23 of the second split mold 20 by etching is transferred at the time of injection molding, thereby forming the asperity relief pattern for skin adhesion on the back surface of the watch band. To form. [Selected figure] Figure 1

Description

  The present invention relates to a method of molding a wrist watch band, a mold and a method of manufacturing the same.

  Most of watch bands made of resin are molded by injecting a resin into a mold, and can be manufactured inexpensively. However, if the surface of the watch band is not patterned, it will be uninteresting. Therefore, the surface of the watchband made of resin is often decorated.

  In Patent Document 1, a band surface layer is formed on one side of a resin sheet by applying a decoration such as a design, characters, etc. by hot stamping, printing, etc., and the band surface layer is set in a fixed mold and movable in the fixed mold. Described is a method for obtaining a watch band in which a mold is clamped and a molten soft synthetic resin is injected into a cavity between the two molds, and a band main body of the soft synthetic resin is joined to the back side of the transparent resin sheet There is.

  In the patent document 2, another resin sheet is adhered to the back side of the resin sheet in view of the fact that the decoration is melted by the heat of the synthetic resin when the back surface of the resin sheet is decorated by the method of the above-mentioned patent document It is described to polymerize.

  In the patent document 3, when the decoration is applied to the surface of the resin sheet according to the method of the above-mentioned patent document, in view of the fact that the decoration lacks wear resistance, the transparent protective coating film is covered to cover the decoration on the surface of the resin sheet. It describes that it provides.

  According to Patent Document 4, in order to manufacture various types of watch bands at low cost, after manufacturing one type of plural basic bodies made of synthetic resin by injection molding, each of the basic bodies has a desired unevenness pattern. It is described that multiple types of embossed patterns are made using multiple types of pressing molds, and desired colors are further colored on these multiple types of embossed patterns by printing or painting to create multiple types of colored embossed patterns. It is done.

Japanese Patent Application Laid-Open No. 62-60510 Japanese Patent Application Laid-Open No. 6-312434 Unexamined-Japanese-Patent No. 7-8308 JP 2001-112517 A

  The methods of Patent Documents 1 to 3 are not efficient in that the process of providing a decoration to a resin sheet and the process of setting the resin sheet in a mold are required before injection molding. In addition, the cost increases because the resin sheet is required. In addition, it is difficult to apply a concavo-convex pattern such as a leather pattern having a high-class appearance to the resin sheet as a decoration.

  The method of Patent Document 4 can provide an uneven pattern such as a leather pattern. However, this method is not efficient in that the step of shaping the concavo-convex pattern is necessary after the injection molding is performed by heating the pressing mold having the reverse asperity and pressing it against the basic body. In addition, in the method of pressing the pressing die against the basic body, since the transferability from the reverse asperity to the asperity pattern is not so good, it is not possible to faithfully shape a real complex leather pattern etc. It was one.

  Also, neither method takes care of the back of the watch band. If the back of the watch band is a smooth surface, it adheres to the skin entirely when it is worn on an arm, sticking with sweat or sebum, and the feeling of wearing deteriorates.

  Therefore, the object of the present invention is to form a leather-like and seam-like uneven pattern and an uneven pattern for skin adhesion alleviation efficiently and with high transferability on the front and back surfaces of a wristwatch band during injection molding. A method and a mold are provided.

(1) In a method of injection molding a resin or elastomer into a mold and injection molding a watch band,
Leather-like and seam-like concavo-convex patterns are formed on the surface of the watch band by transferring at the time of injection molding the leather-like and seam-like reversal concavities and convexities formed by electroforming on the mold;
What is claimed is: 1. A method of forming a wrist watch band, comprising forming a concave / convex pattern for skin contact relaxation on a back surface of the watch band by transferring the skin contact relieving reversal unevenness formed on the mold by etching during injection molding.

(2) A watchband mold having a first split mold and a second split mold for injection molding the watchband with resin or elastomer,
The first split type includes a first nest having a leather-like and a seam-like reverse asperity for transferring and shaping a leather-like and a seam-like asperity pattern on the surface of a watch band,
A second split mold includes a second insert having a second recess having a reverse asperity for skin contact alleviation for transferring and shaping a skin contact alleviation asperity pattern on the back surface of the watch band.

  Here, it is preferable that the first nesting is a combination of a nickel plate having leather-like and seam-like reversal unevenness and a steel plate overlapped and joined to the back surface of the nickel plate. A nickel plate is suitable for forming by electroforming, and a steel plate is excellent in reinforcement by low rigidity and low cost.

  The first split mold may be a cavity mold, and the second split mold may be a core mold (including a substantially flat mold having substantially no convex portion).

  It is preferable that the leather-like and the stitch-like reversal unevenness be formed by electroforming, and the reversal unevenness for skin contact relaxation be formed by etching. The electroforming is excellent in the transferability of the original complex leather-like concavo-convex pattern and the seam-like concavo-convex pattern, and it is possible to form a highly accurate leather-like and seam-like reverse concavo-convex. Moreover, it is because etching can form the reversal unevenness | corrugation for skin contact relaxation in a short time.

  A wristwatch band can be formed by injecting a resin or an elastomer into the above watchband mold.

(3) A method of manufacturing a watchband mold including a first split mold and a second split mold for injection molding the watchband with resin or elastomer,
A first nest is formed by electroforming a leather-like and seam-like reversal unevenness for transfer shaping of a leather-like and seam-like concavo-convex pattern on the surface of a watch band, and the first nest is a first split type Attached to
A second nest is produced by etching the skin contact relieving unevenness for transferring and shaping the skin adhesion relieving unevenness pattern on the back surface of the watch band, and the second nest is attached to the second split mold. A method of manufacturing a watch band mold.

  According to the present invention, it is possible to shape the leather-like and stitch-like uneven patterns and the skin close-contacting uneven patterns on the front and back surfaces of the wrist watch band efficiently and with high transferability.

FIG. 1 shows a wrist watch band mold of the embodiment, where (a) is a front view of a first split mold and (b) is a front view of a second split mold. FIG. 2 shows injection molding using a watchband mold, where (a) is a cross-sectional view when the mold is closed and injected, and (b) is a cross-sectional view when the mold is opened and the mold is released. FIG. 3 shows an injection-molded wristwatch band, wherein (a) is a perspective view on the front side, and (b) is a perspective view on the back side. FIG. 4 is a partial perspective view showing another example of the leather-like and stitch-like uneven patterns on the surface. FIG. 5 is a partial perspective view showing another example of the uneven surface relief pattern on the back surface.

1. Leather-like and seam-like concavo-convex patterns Leather-like and seam-like concavo-convex patterns include both leather-like concavo-convex patterns and seam-like concavo-convex patterns, and only leather-like patterns or only seam-like concavo-convex patterns In comparison, it can be a watch band rich in luxury.
The leather-like unevenness pattern is not particularly limited, but it is a leather-like unevenness such as mammals (cow, pig, horse, deer, goat, sheep etc.), reptiles (crocodile, lizard, snake, turtle etc.), birds (ostrich etc.), etc. A pattern can be illustrated.
The stitch-like concavo-convex pattern is not particularly limited, but can be exemplified as a stitch-like concavo-convex pattern such as plain stitching, stitch stitching, cross stitch, chain stitch and the like.

2. Irregularity Pattern for Skin Adhesion Relief The irregular pattern for skin adherence relief prevents the back surface of the watchband from fully adhering to the skin when the watchband is worn on the arm, and prevents sticking with sweat or sebum And improve the fit.
Although it does not specifically limit as an uneven | corrugated pattern for skin contact relaxation, The multiple repeating arrangement | sequence of a unit pattern can be illustrated. The unit pattern is not particularly limited, but may be a circular, polygonal, linear, etc. convex or concave pattern.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The materials, configurations, and numerical values described in the examples are merely illustrative and can be changed as appropriate.

First, the wrist watch band 1 (FIG. 3) injection-molded from a resin or an elastomer in this embodiment will be described.
As shown in FIG. 3 (a), a leather-like and seam-like uneven pattern 2 is transfer-formed from a mold at the time of injection molding on the surface of the watch band 1, and the leather-like and seam-like shapes of the illustrated example are formed. The uneven pattern 2 is a combination of leather-like uneven pattern 2a of ostrich leather and seam-like uneven pattern 2b of plain stitching. The leather-like emboss pattern 2a of ostrich leather is unique including a round protrusion pattern (a real ostrich leather can have a feathered mark) and a fine groove pattern.

  As shown in FIG. 3B, the uneven pattern 3 for skin contact relaxation is transferred and shaped from the mold at the time of injection molding on the back surface of the wristwatch band 1, and the uneven pattern 3 for skin contact relaxation in the illustrated example is It is a multiple repeating array of unit circular convex patterns.

  The watch band mold shown in FIGS. 1 and 2 is provided with a first split mold 10 and a second split mold 20 for injection molding the watch band from a resin or an elastomer. The first split type is a cavity type and is a movable type, and the second split type is a core type (however, a substantially flat type having substantially no convex portion) and is a fixed type.

  The first split mold 10 includes a first base 11 and a first insert 13 fitted in a pocket 12 machined in the first base 11 and fixed by a screw.

  The first nesting 13 is a combination of the nickel plate 14 and a steel plate 17 which is overlapped on the back surface of the nickel plate 14 and joined by a screw. The nickel plate 14 has a concave molding surface 15 forming a wristwatch band-shaped cavity together with a substantially flat molding surface 24 described later, and the leather-like and seam-like irregularities formed on the surface of the wristwatch band formed on the concave molding surface 15. It has leather-like and stitch-like reverse asperities 16 for transferring and shaping the pattern 2. The leather-like and stitch-like reverse asperities 16 are formed by electroforming. In the illustrated example, the leather-like and seam-like reversal unevenness 16 is a seam-like reversal where the leather-like reversal unevenness 16a in which the unevenness relationship of the leather-like unevenness pattern 2a is reversed and the unevenness relationship of the seam-like unevenness pattern 2b is reversed. It is a combination with the unevenness 16b. The leather-like reverse asperity 16a includes a recess in which the concavity and convexity relationship of the round protrusion pattern is reversed and a ridge in which the concavity and convexity relationship of the thin groove pattern is reversed.

  The second split mold 20 includes a second base 21 and a second insert 23 which is inserted into a pocket 22 formed on the second base 21 and fixed by a screw. The second base 21 to the second insert 23 are formed with sprues 26, runners 27 and gates 28 for injecting a resin or an elastomer into the cavity.

  The second nesting 23 is formed on the substantially flat molding surface 24 forming the cavity together with the above-mentioned concave molding surface 15 and the substantially flat molding surface 24. And a reverse asperity 25 for relieving skin contact for shaping. The skin unevenness relieving reversal unevenness 25 is formed by etching. The skin unevenness relieving reversal unevenness 25 in the illustrated example is a plurality of repetitive arrays of unit circular recesses in which the unevenness relationship of the unit circular convex pattern is reversed.

The watchband mold was manufactured in the following manner.
1. First split type 10
(1) A prototype of the same shape as a wristwatch band is manufactured, with a genuine ostrich leather pasted as a leather-like and seam-like uneven pattern on the surface. Paste the back of this model onto a flat parting table. The prototype and the parting table may be integrally formed. A fluid material of a low adhesion female mold material such as silicone rubber is placed on the parting stand prototype to solidify the flowable material, and a female mold is prepared by reversing the leather pattern of the master. A fluid material of a mandrel material such as an epoxy resin is injected into the female mold to solidify the fluid material, and a reverse product of the negative pattern of the female mold is further inverted to form a solidified material. A conductive film is formed on the surface of the solidified material to produce a mandrel. In addition, a conductive film can be formed directly on the surface of the above-mentioned parting stand attached master to manufacture a mandrel.

(2) The mandrel is immersed in an electroforming solution (an electrolytic solution of a nickel compound) to perform nickel electroforming on the conductive film, thereby forming a nickel plate 14. By this electroforming, a concave molding surface 15 and a leather-like and stitch-like reversal unevenness 16 are formed by inverting the mandrel.
(3) The steel plate 17 is joined to the nickel plate 14 with a screw to make the first insert 13.
(4) The first substrate 11 in which the pocket 12 is processed is manufactured.
(5) The first insert 13 is inserted into the pocket 12 and fixed to the first base 11 with a screw.

2. Second split type 20
(1) The reverse asperity 25 for relieving skin contact is formed by etching at a portion that is to be the substantially flat shaped forming surface 24 of the steel plate 17, and the second nest 23 is manufactured. The etching can be performed, for example, by photoetching using a film mask.
(2) The second base 21 in which the pocket 22 is processed is manufactured.
(3) The second insert 23 is inserted into the pocket 22 and fixed to the second base 21 with a screw.

The watchband was molded in the following manner using the watchband mold.
As shown in FIG. 2A, the second split mold 20 is closed on the first split mold 10, and a resin or elastomer is injected from the sprue 26 into the cavity to injection-mold the wristwatch band 1. At the time of injection molding, leather-like and seam-like concavo-convex patterns are formed on the surface of the watch band 1 by transferring the leather-like and seam-like reverse concavities and convexities 16 formed by electroforming to the first nest 13. By transferring the reverse adhesion 25 for skin contact relaxation formed on the two nests 23 by etching, a skin contact relieving unevenness pattern is formed on the back surface of the wrist watch band 1.

  After the watchband mold is cooled to a certain temperature or lower, as shown in FIG. 2B, the first split mold 10 to the second split mold 20 are opened, and the watchband 1 is removed.

The following effects can be obtained by this embodiment.
(A) Electroforming is excellent in the transferability of the original complex leather-like uneven pattern and stitch-like uneven pattern, and can form a leather-like and stitch-like inverted unevenness 16 with high accuracy. Moreover, the etching can form the reversal unevenness 25 for skin contact relaxation in a short time.

(A) During the injection molding of the wristwatch band 1, it is possible to shape the leather-like and seam-like concavo-convex patterns 2 and the skin adhesion relieving concavo-convex patterns 2 on the front and back surfaces efficiently and with high transferability. As in the prior art, no other process is required for pattern shaping.

(C) The leather-like and stitch-like uneven pattern 2 includes both the leather-like uneven pattern 2a and the stitch-like uneven pattern 2b, compared with the case of only the leather-like pattern or only the stitch-like uneven pattern Can be a watch band rich in luxury. As described above, the leather-like and seam-like concavo-convex patterns 2 formed with high transferability to the wristwatch band by the leather-like and seam-like reverse concavities and convexities 16 with high transferability from the original are very realistic.

(E) The unevenness pattern 3 for skin adhesion relaxation reduces the fact that the back of the wristwatch band 1 adheres completely to the skin when the wristwatch band 1 is attached to the arm, and prevents sticking with sweat or sebum And improve the fit.

(E) The watch band 1 is made of resin or elastomer and has features such as waterproofness, durability, and hypoallergenicity.

The present invention is not limited to the embodiments described above, and can be appropriately modified and embodied without departing from the spirit of the invention.
(1) The leather-like uneven pattern 2a is not particularly limited as described above, and various patterns can be adopted. For example, (a) of FIG. 4 is a snake leather, (b) is a cow leather, and (c) is an example of a lizard leather.

(2) The unevenness pattern 3 for skin adhesion relaxation is not particularly limited as described above, and various patterns can be adopted. For example, (a) in FIG. 5 is a multiple repeating arrangement of unit square convex patterns, (b) is a multiple repeating array of unit yarn weave patterns, (c) is a multiple repeating array of unit linear convex patterns, (d) is a meandering linear convex pattern It is an example of a pattern.

DESCRIPTION OF SYMBOLS 1 wristwatch band 2 seam-like uneven pattern 2a leather-like uneven pattern 2b seam-like uneven pattern 3 uneven pattern for skin adhesion relaxation 10 first split type 11 first base 12 pocket 13 first nest 14 nickel plate 15 concave shaped surface 16 Leather-like and seam-like reversal unevenness 16a Leather-like reversal unevenness 16b Seam-like reversal unevenness 17 steel plate 20 second split type 21 second base 22 pocket 23 second nest 24 almost flat shaped molding surface 25 reversal unevenness for skin adhesion relaxation 26 Sprue 27 Runner 28 Gate

Claims (7)

In a method of injecting a resin or an elastomer into a mold and injection molding a watch band,
Leather-like and seam-like concavo-convex patterns are formed on the surface of the watch band by transferring at the time of injection molding the leather-like and seam-like reversal concavities and convexities formed by electroforming on the mold;
What is claimed is: 1. A method of forming a wrist watch band, comprising forming a concave / convex pattern for skin contact relaxation on a back surface of the watch band by transferring the skin contact relieving reversal unevenness formed on the mold by etching during injection molding. In a watchband mold provided with a first split mold and a second split mold for injection molding the watchband with resin or elastomer,
The first split type includes a first nest having a leather-like and a seam-like reverse asperity for transferring and shaping a leather-like and a seam-like asperity pattern on the surface of a watch band,
A second split mold includes a second insert having a second recess having a reverse asperity for skin contact alleviation for transferring and shaping a skin contact alleviation asperity pattern on the back surface of the watch band.   2. A watchband mold according to claim 1, wherein the first nesting is a combination of a nickel plate having leather-like and seam-like reverse irregularities and a steel plate superposed and joined to the back of the nickel plate.   The watch band mold according to claim 2 or 3, wherein the first split mold is a cavity mold and the second split mold is a core mold.   The watch-band mold according to any one of claims 2 to 4, wherein the leather-like and seam-like reversal unevenness is formed by electroforming, and the reversal unevenness for skin contact relaxation is formed by etching. .   A method for forming a wristwatch band, comprising molding a wristwatch band by injecting a resin or an elastomer into the wristwatch band mold according to any one of claims 2 to 5. In a method of manufacturing a watchband mold having a first split mold and a second split mold for injection molding the watchband with resin or elastomer,
A first nest is formed by electroforming a leather-like and seam-like reversal unevenness for transfer shaping of a leather-like and seam-like concavo-convex pattern on the surface of a watch band, and the first nest is a first split type Attached to
A second nest is produced by etching the skin contact relieving unevenness for transferring and shaping the skin adhesion relieving unevenness pattern on the back surface of the watch band, and the second nest is attached to the second split mold. A method of manufacturing a watch band mold.

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