JP2012070913A - Method for manufacturing artificial nail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing an artificial nail by which an artificial nail having an intended pattern is efficiently manufactured.SOLUTION: The artificial nail 10 has the intended pattern put thereon and made of a polyurethane resin, the artificial nail is manufactured by disposing a first magnet 34 and a second magnet 36 in a mold 20 defining a cavity 44 corresponding to the artificial nail 10, along the pattern of the artificial nail 10, injecting a polyurethane resin material 46 mixed with a magnetic material 14 between synthetic resin sheets 40 and 42 set on the surfaces of the mold 20, and curing and molding the polyurethane resin material 46.

Description

  The present invention relates to a method for manufacturing a false nail having a pattern.

  The artificial nail is patterned by applying a paint such as nail polish to the surface of the base material after molding a plain base material with a synthetic resin such as acrylic. As described above, the artificial nail for painting a pattern has a drawback that it takes time and requires skill. In view of this, there has been proposed a method in which a synthetic opal is mixed with synthetic opal and molded to disperse and decorate a transparent artificial nail with a granular material that reflects light (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 1-72803

  However, in the manufacturing method disclosed in Patent Document 1, the intended pattern cannot be applied because the granular material diffuses randomly in the base material.

  That is, the present invention has been proposed to solve these problems in view of the problems inherent in the prior art, and an object of the present invention is to provide a production method capable of efficiently obtaining false nails having a pattern. To do.

In order to overcome the above-mentioned problems and achieve the intended purpose, the manufacturing method of the false nail of the invention according to claim 1 of the present application,
A method for producing artificial nails made of a polyurethane resin with a pattern,
A molding die that defines a cavity corresponding to the artificial nail is arranged with a magnet in accordance with the pattern, and a polyurethane resin raw material mixed with a magnetic material is placed in the cavity to cure and mold the polyurethane resin raw material. It is characterized by that.
According to the first aspect of the present invention, the magnet is arranged on the mold according to the pattern so that the magnetic material is concentrated to form the pattern. Therefore, the pattern is intended without secondary processing such as painting after molding. It is possible to easily manufacture false nails having

The gist of the invention according to claim 2 is that the mold is made of a non-magnetic material.
According to the invention of claim 2, since the mold is hardly magnetized, the influence of the magnet can be easily reflected on the magnetic body, and the pattern of the false nail can be made clearer.

The gist of the invention according to claim 3 is that the magnet is arranged so that the south pole and the north pole alternately face the cavity.
According to the invention which concerns on Claim 3, the pattern by a magnetic body can be complicated by the interaction between magnetic poles.

The invention according to claim 4 is characterized in that a synthetic resin sheet formed in accordance with the mold surface of the mold is placed on the mold surface, and the polyurethane resin raw material is molded between the sheets. .
According to the invention which concerns on Claim 4, since a nail | claw is shape | molded between sheets, a polyurethane resin raw material does not contact the mold surface of a shaping | molding die directly. Thereby, since a mold release agent becomes unnecessary, the appearance defect of the artificial nail by the residue of a mold release agent can be avoided.

According to a fifth aspect of the present invention, the mold is made of a synthetic resin that can be peeled off from a polyurethane resin obtained when the polyurethane resin raw material is cured in contact with the polyurethane resin raw material on the design surface side of the artificial nail. A release sheet is installed, and a synthetic resin adhesive sheet that adheres to the polyurethane resin obtained when the polyurethane resin raw material is cured in contact with the polyurethane resin raw material on the nail attachment surface side of the artificial nail is installed The gist is that the release sheet is peeled off from the polyurethane resin after the polyurethane resin is molded.
According to the invention according to claim 5, since the design surface of the artificial nail is formed by removing the release sheet that can be peeled from the polyurethane resin, it is a sheet made of a synthetic resin that is easy to form smoothly compared to the mold surface of the mold. The design surface is defined, and the appearance of the artificial nail obtained without depending on the mirror surface degree of the mold surface of the mold can be improved.

  According to the false nail manufacturing method of the present invention, an intended pattern can be applied simultaneously with the artificial nail formation, and an artificial nail having a pattern can be efficiently manufactured.

It is a top view of the artificial nail which concerns on an Example. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is a top view which shows the 2nd type | mold of the shaping | molding die which shape | molds the artificial nail of an Example. It is CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG. It is explanatory drawing which shows the process of arrange | positioning the magnet of an Example to a shaping | molding die, Comprising: (a) shows the state before installing a magnet, (b) shows the state after installing a magnet. It is explanatory drawing which shows the formation process of the artificial nail of an Example, (a) shows the state which installed the sheet | seat on the type | mold surface, (b) shows the state into which the polyurethane resin raw material was thrown in, (c), A state in which the magnetic material is collected by the magnet is shown, and (d) shows a state in which the artificial nail is taken out from the mold.

  The false nail manufacturing method according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments. The false nail refers to the direction or part of the false nail when attached to the nail, the side attached to the nail in the false nail is referred to as the mounting surface, and the side facing the outside opposite to the mounting surface is referred to as the design surface. Furthermore, in the false nail, the direction from the base side of the nail toward the tip side of the nail is referred to as a vertical direction.

  As shown in FIG. 1 to FIG. 3, in the example, a curved shape was formed so as to match the shape of the nail, and a heart-shaped outline pattern was added in a vertically long ellipse. An example in which the artificial nail 10 is manufactured from a polyurethane resin will be described. The false nail 10 of the embodiment is configured by bonding a polyurethane resin layer 12 made of a polyurethane resin with a pattern and an adhesive sheet 40. The polyurethane resin layer 12 constitutes the design surface 16 and the adhesive sheet 40 constitutes the attachment surface 18. Moreover, the pattern attached | subjected to the artificial nail | claw 10 is formed with the magnetic powder 14 diffused in transparent polyurethane resin. In the embodiment, a powdery material is used as the magnetic material. Here, a magnetic body means what is attracted to magnets, such as iron, nickel, and cobalt. Further, the pattern formed by the magnetic material includes not only a figure or contour due to the convergence of the magnetic material but also a pattern due to the density of the magnetic material.

  As shown in FIGS. 7 and 8, the artificial nail 10 is molded by molding the polyurethane resin raw material 46 in the cavity 44 of the mold 20 in which the magnets 34 and 36 are arranged in accordance with the pattern of the artificial nail 10. It is manufactured with a pattern at the same time as molding. Here, the mold 20 is made of a non-magnetic material. The non-magnetic material referred to in the present application refers to a substance that is not easily magnetized and cannot be attracted to magnets such as aluminum, copper, and manganese. In the embodiment, aluminum is adopted. The mold 20 includes a first mold 22 having a mold surface formed in accordance with the attachment surface 18 of the artificial nail 10, and a second mold 24 having a mold surface formed in accordance with the design surface 16 of the artificial nail 10. Consists of In the mold 20, a cavity 44 is defined between the first mold 22 and the second mold 24 so as to be larger than the polyurethane resin layer 12 by sheets 40 and 42 described later. As shown in FIGS. 4 to 6, the second mold 24 has a magnet member 30 constituting the mold surface, and a main body member having a recess 28 that is recessed from the mold surface by the thickness of the magnet member 30 and into which the magnet member 30 is fitted. 26. Magnets 34 and 36 are arranged on the magnet member 30 in accordance with the pattern of the artificial nail 10. In the embodiment, rubber-like permanent magnets are employed as the magnets 34 and 36. The magnet member 30 of the embodiment includes a heart-shaped first magnet 34, an elliptical second magnet 36 that includes the first magnet 34, and an aluminum frame that holds the magnets 34, 36. 38. The frame 38 is provided with a dent corresponding to the magnets 34 and 36, and the first magnet 34 is disposed with the south pole facing the cavity 44 side, and the second magnet 36 is disposed with the north pole facing the cavity 44 side. It is not installed. That is, the S pole and the N pole are arranged on the mold surface of the second mold 24 so as to face the cavity 44 alternately. The magnet member 30 is detachable from the main body member 26, and the artificial nail 10 having a different pattern can be manufactured by replacing the magnet member 30.

  As shown in FIG. 8, the artificial nail 10 is not formed by directly molding the polyurethane resin layer 12 between the mold surface of the first mold 22 and the mold surface of the second mold 24, but the mold of the first mold 22. The polyurethane resin layer 12 is molded between the adhesive sheet 40 installed on the surface and the release sheet 42 installed on the mold surface of the second mold 24. The adhesive sheet 40 is formed in accordance with the mold surface of the first mold 22 (on the attachment surface side of the false nail 10), and can be attached in alignment with the mold surface. The adhesive sheet 40 is a thin film-like body made of a synthetic resin that adheres to a polyurethane resin, which is shaped by vacuum forming or the like according to the mold surface of the first mold 22. Here, “adhering to the polyurethane resin” means that the adhesive sheet 40 adheres to the obtained polyurethane resin when the polyurethane resin raw material 46 is cured in a state where the synthetic resin constituting the adhesive sheet 40 is in contact therewith. . As the adhesive sheet 40, it is preferable to employ a thermoplastic resin from the viewpoint of ease of shaping, and an ABS resin is used in the embodiment.

  The release sheet 42 is formed in accordance with the mold surface of the second mold 24 (the design surface side of the false nail 10), and can be attached in alignment with the mold surface. The release sheet 42 defines a space that matches the polyurethane resin layer 12 between the release sheet 42 and the adhesive sheet 40. The release sheet 42 is a thin film-like body made of a synthetic resin that can be peeled off from a polyurethane resin, and is shaped by vacuum forming or the like according to the mold surface of the second mold 24. Here, “removable from the polyurethane resin” means that the release sheet 42 can be peeled from the obtained polyurethane resin when the polyurethane resin raw material 46 is cured in contact with the synthetic resin constituting the release sheet 42. For example, polyolefin resin can be adopted. In the embodiment, a polypropylene resin is used as the release sheet 42.

  The manufacturing method of the artificial nail 10 of the embodiment includes an arranging step of arranging magnets 34 and 36 in accordance with the pattern of the artificial nail 10 on the mold 20 (see FIG. 7), and a molding step of molding the polyurethane resin layer 12 (see FIG. 8), and a finishing process is performed as necessary. In the arranging step, the magnet member 30 is set in the second die 24 by setting the magnet member 30 in the recess 28 of the main body member 26 in the second die 24 (see FIG. 7A). Magnets 34 and 36 are arranged on the mold 20 (see FIG. 4 or FIG. 7B). Next, in the molding process, the adhesive sheet 40 is set on the mold surface of the first mold 22 and the release sheet 42 is set on the mold surface of the second mold 24 on which the magnet member 30 is installed (see FIG. 8A). ). A polyurethane resin layer comprising a polyol (for example, INOAC polyol: VTK8008-M0A), an isocyanate (for example, INOAC isocyanate: VTK8008-M0B), magnetic powder 14 (for example, BASF pigment: VEGETABLE BLACK OLIVE), and various additives. A polyurethane resin raw material 46 corresponding to 12 is prepared separately. In the embodiment, the polyurethane resin raw material 46 is prepared by mixing the black magnetic powder 14 with the polyol and isocyanate that become transparent when cured. By closing the first mold 22 and the second mold 24, a space for the polyurethane resin layer 12 is defined between the adhesive sheet 40 and the release sheet 42. A polyurethane resin raw material 46 is put between the adhesive sheet 40 and the release sheet 42 (see FIG. 8B), and the magnetic powder 14 is scattered by the magnets 34 and 36 of the magnet member 30 arranged in the mold 20 to form a pattern. It is formed (see FIG. 8C). Since the magnetic powder 14 moves in the polyurethane resin raw material 46, the polyurethane resin raw material 46 is required to have a viscosity and a curing speed at which the magnetic powder 14 can move.

  The magnets 34 and 36 attract the magnetic powder 14, and the nonmagnetic material does not act on the magnetic powder 14. Further, in the portion where the first magnet 34 and the second magnet 36 having different polarities facing the cavity 44 are adjacent to each other, the magnetic force cancels out between the magnetic poles and does not act on the magnetic powder 14. To do. Accordingly, the magnetic powder 14 extends from the portion where the aluminum frame 38 faces and the heart-shaped contour portion where the adjacent portion of the first magnet 34 and the second magnet 36 faces to the portion where the first magnet 34 and the second magnet 36 face. Is attracted. Then, in the polyurethane resin raw material 46, a pattern of the magnetic powder 14 in which a heart-shaped outline is outlined in an ellipse is formed. After moving the magnetic powder 14 to the intended position in advance, the polyurethane resin raw material 46 is reacted and cured to form the artificial nail 10 having a pattern in which the magnetic powder 14 is scattered on the transparent polyurethane resin layer 12. Is done. Then, the mold 20 is opened, the release sheet 42 is removed from the polyurethane resin layer 12, and the polyurethane resin layer 12 to which the adhesive sheet 40 is bonded is taken out from the first mold 22 and the second mold 24 (FIG. 8D). reference).

  In the finishing process of the embodiment, the artificial nail 10 is completed by cutting off the portion extending from the polyurethane resin layer 12 of the adhesive sheet 40 remaining on the mounting surface side of the polyurethane resin layer 12.

  As described above, according to the manufacturing method of the embodiment, the magnetic powder 14 is scattered by the magnets 34 and 36 arranged in the molding die 20 to form a pattern, so that the intended pattern can be obtained without secondary processing after molding. The artificial nail 10 having the above can be easily manufactured. Further, the magnets 34 and 36 are disposed on the magnet member 30 that is detachably fitted in the recess 28 of the mold 20, and the pattern 34 can be obtained by replacing the magnet 34 with another magnet member 30 having a different arrangement of the magnets 34 and 36. Different false claws 10 can be easily manufactured. And since a permanent magnet is employ | adopted as the magnets 34 and 36, the structure of a type | mold can be simplified. Furthermore, since the magnets 34 and 36 are disposed on the mold surface of the second mold 24 that forms the design surface 16 of the artificial nail 10, the design surface 16 and the magnets 34 and 36 are molded close to each other. On the design surface 16 side close to the magnets 34, 36, the magnetic powder 14 is more likely to be collected than on the attachment surface 18 side, and the intended design pattern can be reliably attached to the design surface 16.

  According to the manufacturing method of the embodiment, since the mold 20 is made of aluminum which is a nonmagnetic material, the mold 20 is difficult to be magnetized. That is, since the magnetic force of the magnets 34 and 36 is easily reflected in the magnetic powder 14, the magnetic powder 14 is easily collected by the magnets 34 and 36, and the pattern of the artificial nail 10 can be made clear. Further, since the S-pole second magnet 36 is disposed on the mold surface of the mold 20 so as to surround the N-pole first magnet 34, a complex magnetic field is generated in the cavity 44 due to the interaction between the magnetic poles. The pattern by the magnetic powder 14 can be complicated.

  According to the manufacturing method of the embodiment, the mold surface of the first mold 22 and the mold surface of the second mold 24 are covered with the synthetic resin sheets 40 and 42, and the polyurethane resin raw material 46 is the mold of the mold 20. Since it does not directly contact the surface, the polyurethane resin layer 12 does not adhere to the mold 20. That is, it is not necessary to apply a release agent to the mold surface of the mold 20, and the application of the release agent and the removal of the release agent remaining on the molded product can be omitted. Moreover, the obtained nail | claw 10 does not have appearance defects, such as cloudiness by the residue of a mold release agent, and can improve decorating property.

  According to the manufacturing method of the embodiment, the release sheet 42 made of a synthetic resin that can be peeled off from the polyurethane resin is removed to form the surface to be the design surface 16 of the artificial nail 10, so that the patterned polyurethane resin layer 12 is formed. It becomes the design surface 16 and the appearance of the artificial nail 10 can be improved. In addition, the obtained artificial nail 10 is formed of a synthetic resin release sheet 42 that is superior in surface smoothness to the mold surface of the mold 20 made of metal or the like, thereby improving the smoothness of the design surface 16. can do. And since the artificial nail | claw 10 is not influenced by the mirror surface degree of the type | mold surface of the shaping | molding die 20, the manufacturing cost and the maintenance cost of the shaping | molding die 20 can be reduced. Furthermore, since the adhesive sheet 40 that adheres to the polyurethane resin layer 12 is formed to have a size that protrudes from the cavity 44 of the mold 20, it is easy to handle the artificial nail 10 at the manufacturing stage. In particular, when a large number of false nails 10 are manufactured using a single adhesive sheet 40, a large number of false nails 10 can be handled via the single adhesive sheet 40, thereby improving workability.

(Example of change)
The present invention is not limited to the above-described embodiment, and can be modified as follows.
(1) In the examples, a polyurethane resin raw material that is cured and transparent is adopted, but it may not be transparent and may be colored as long as the pattern of the magnetic material can be visually recognized.
(2) In the embodiment, a granular magnetic material is used, but it is sufficient to form a pattern by converging with a magnet, for example, a flaky or fibrous magnetic material, and a magnetic material coated with a color material such as a pigment. It may be the body. By coating the magnetic material with a color material, a false nail with a colored pattern can be obtained.
(3) In the embodiment, the magnet is arranged in the second mold that forms the design surface of the artificial nail, but the magnet may be arranged in the mold according to the pattern of the artificial nail. A magnet may be arranged in the first mold forming the surface. In the embodiment, the magnet is disposed on the magnet member that can be attached to and detached from the second-type main body member, but the magnet may be integrated with the molding die. Further, the magnet may be embedded in the mold without being exposed to the mold surface.
(4) In the embodiment, the magnet is arranged so that the S pole and the N pole face each other in the cavity, but the magnet may be arranged so that only one of the S pole and the N pole faces the cavity. . Further, the entire mold surface may be composed of magnets.
(5) In the embodiment, the magnet is arranged only in the second type, but the magnet may be arranged in both the first type and the second type. The closer to the magnet, the easier it is for the magnetic material to condense, and the pattern becomes thinner toward the surface far from the surface near the magnet. In the part where the magnet is arranged in the second mold, the pattern becomes thinner from the design surface toward the mounting surface. Therefore, a pattern that becomes thinner from the design surface toward the mounting surface and a pattern that becomes darker from the design surface toward the mounting surface can be added, and a stereoscopic effect can be produced in the thickness direction of the artificial nail.
(6) In the embodiment, a rubber-like magnet is adopted, but a bar magnet may be used. In the embodiment, a permanent magnet is used as the magnet, but an electromagnet may be used.
(7) In the examples, an ABS resin is used as the adhesive sheet, but it may be made of a synthetic resin that adheres to the polyurethane resin, and may be a polyacrylic resin, for example. Moreover, although a polypropylene resin is employ | adopted as a peeling sheet, what is necessary is just the synthetic resin which can be peeled from a polyurethane resin, for example, synthetic resins other than polyolefin resin can be employ | adopted if it can peel from a polyurethane resin. Moreover, although what was vacuum-formed as an adhesive sheet and a peeling sheet was employ | adopted, it should just be formed according to the type | mold surface of a shaping | molding die.
(8) Furthermore, although an adhesive sheet is installed on the mold surface of the first mold and a release sheet is installed on the mold surface of the second mold, the sheet may be omitted even if it is disposed only on one mold surface. .
(9) In the embodiment, the synthetic resin sheet is placed on the mold surface of the mold, but a release agent may be applied.
(10) The mold of the embodiment has the first mold on the top and the second mold on the bottom. However, the second mold may be placed on the top and the first mold on the bottom. May be.

10 false nails, 14 magnetic powder (magnetic material), 20 mold, 34 first magnet (magnet)
36 Second magnet (magnet), 40 Adhesive sheet, 42 Release sheet, 44 Cavity 46 Polyurethane resin raw material

Claims (5)

A method for producing artificial nails made of a polyurethane resin with a pattern,
A molding die that defines a cavity corresponding to the artificial nail is arranged with a magnet in accordance with the pattern, and a polyurethane resin raw material mixed with a magnetic material is placed in the cavity to cure and mold the polyurethane resin raw material. The manufacturing method of the false nail characterized by having made it.   The false nail manufacturing method according to claim 1, wherein the mold is made of a nonmagnetic material.   The false magnet manufacturing method according to claim 1 or 2, wherein the magnet is arranged with the south pole and the north pole alternately facing the cavity.   The synthetic resin sheet formed according to the mold surface of the mold is placed on the mold surface, and the polyurethane resin raw material is molded between the sheets. False nail manufacturing method.   The mold is provided with a release sheet made of a synthetic resin that can be peeled off from the polyurethane resin obtained when the polyurethane resin raw material is cured while being in contact with the polyurethane resin raw material on the design surface side of the artificial nail, An adhesive sheet made of synthetic resin that adheres to the polyurethane resin obtained when the polyurethane resin raw material is cured while being in contact with the polyurethane resin raw material is installed on the attachment surface side of the artificial nail on the artificial nail, and the polyurethane resin is molded. The false nail manufacturing method according to claim 4, wherein the release sheet is peeled off from the polyurethane resin.

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