JP5838277B1 - False nail manufacturing method - Google Patents

Abstract

An object of the present invention is to make it possible to manufacture false nails having different shapes and sizes using the same mold, thereby making it possible to improve the manufacturing efficiency and lower the product unit price. A molding die 1 having a blank material molding space 2 larger than an artificial nail for manufacturing purposes is used between a male die 1a and a female die 1b made of a transparent or translucent material. A first step of injecting a photocurable material resin 5 having a shape memory effect into the mold 1b, maintaining the combined state of the male mold and the female mold, and applying ultraviolet rays to the material resin inside the mold from the outside of the mold 1 The second step of curing the material resin by irradiation, the third step of taking out the cured blank material from the mold and forming it flat with a molding plate, and cutting out the nail chip having the desired shape and size from the flat blank material A false nail is manufactured through a fourth step, a fifth step in which the nail tip is restored to a curved state using a shape memory effect to obtain a finished product. [Selection] Figure 2

Description

  The present invention relates to an artificial nail manufacturing method, and more particularly, to a manufacturing method that can cope with both high-mix low-volume production and mass production, and can manufacture artificial nails efficiently and inexpensively in both low-volume production and mass production.

  For example, methods described in the following Patent Documents 1 and 2 are known as conventional techniques for false nail manufacture.

  The manufacturing method described in Patent Document 1 is a method that makes it possible to make a false nail with a photocurable resin, and is a first step for manufacturing a light-transmitting mold, and the mold has a photocurable property. The second step of injecting the resin and irradiating light from the outside of the mold to cure the injected resin to manufacture the artificial nail, and the third step of applying the manufactured artificial nail to the user's own nail.

  In the manufacturing method of Patent Document 1, a mold having a false nail molding space (cavity) formed between a male mold and a female mold is first manufactured using a false nail prototype, and then the mold is molded. A photocurable resin is injected into the space. Then, the resin is cured by light.

  The false nail manufactured by such a method is taken out from the mold after curing, and a surplus portion (location corresponding to the resin injection gate of the mold) is cut off and finished. The finished artificial nail has a shape obtained by transferring the original pattern, and this is a finished product.

  In addition, the false nail manufactured by this method is decorated for each item when decoration such as patterning is required.

The false nail manufacturing method described in Patent Document 2 also manufactures false nails using a mold that combines a male mold and a female mold. Although the method of Patent Document 2 makes it possible to apply a pattern at the same time when forming with a mold, the false nail formed with the mold is a finished product, and this point is common with the method of Patent Document 1 doing.

Japanese Patent No. 4565419 JP 2012-70913 A

  In the method of Patent Document 1, the same mold is used in various shapes and sizes in order to create a molding space that matches or approximates the user's nails by using the original mold when manufacturing the mold. In order to satisfy the demands of many users, many molds are required.

  Since the false nail formed by the mold is a finished product having a predetermined shape and size, another mold that meets the requirements is required to meet the demand for changing the shape and size. As a result, the production efficiency is lowered, the production cost per piece is high, and the product unit price is high.

  In addition, in the method of molding a finished nail with a mold, decoration on the obtained nail must be performed for each product.

  Furthermore, since the method of Patent Document 1 is injection molding in which a material resin is injected into a molding space from a resin injection gate provided in the molding die, air removal from the molding space becomes insufficient, and the finished product has a false nail. There is also a problem that bubbles tend to remain.

  In addition, in the manufacturing method of Patent Document 2, a pattern is simultaneously applied to a false nail that is formed at the time of forming a false nail with a mold. Since molding is performed, a large number of molding dies are required in order to satisfy the demands of many users as in the method of Patent Document 1.

  Also, since this method also produces a finished product by molding with a mold, products with different shapes and sizes must be molded with a mold having a molding space of a corresponding shape and size, and manufacturing efficiency is improved. Decline and increase in product price are inevitable. In addition, the manufacturing efficiency by this method may become worse than the method of patent document 1 by giving a pattern at the time of shaping | molding by a shaping | molding die.

  Accordingly, an object of the present invention is to make it possible to manufacture false nails having different shapes and sizes using the same mold, thereby making it possible to improve the manufacturing efficiency and reduce the product unit price.

In order to solve the above-described problems, in the present invention, between the male mold and the female mold each formed of a transparent or translucent material, the size is larger than the artificial nail for manufacturing purposes, and the width direction and the longitudinal direction are 2 A first step of injecting a photocurable material resin having a shape memory effect into the female blank material molding space, using a molding die having a blank material molding space curved in the direction;
A second step of combining the male mold and the female mold, maintaining the state and irradiating the material resin in the blank material molding space with ultraviolet rays from the outside of the mold to cure the resin;
A third step in which the blank material made by curing the material resin is taken out of the mold and heated to form a flat plate with a molding plate;
A fourth step of cutting a nail chip having a desired shape and size from a flat blank material;
There is provided a false nail manufacturing method that undergoes a fifth step in which the nail tip is restored to a curved state using a shape memory effect to obtain a finished product.

  In the third step, if necessary, burrs generated in the blank material are removed before the blank material is formed flat. The heating of the blank material in the third step can be performed simultaneously with the forming by using a hot plate as the forming plate.

  The nail chip can be cut out from the blank material by such a manufacturing method by a punching process using a Thomson blade. When the Thomson blade is used, it is preferable to use a cutting device having a special rubber receiving pad.

  Such a manufacturing method can apply decorations such as patterning and coloring by printing to the flat blank material that has undergone the third step and the nail chips cut out from the flat blank material in the fourth step. If necessary, the decoration process can be added to finish the finished blank and nail chips.

  According to this manufacturing method, a molding die in which a plurality of blank material molding spaces are provided in a set of dies can be used. In terms of product management, it is preferable to use a molding die having five types of blank material molding spaces having different shapes and sizes corresponding to the thumb, index finger, middle finger, ring finger, and little finger.

  Also, this mold may be made of glass, but a resin excellent in releasability, such as one made of polypropylene, is hard to break and adheres to the resin that becomes the material for false nails. Is also preferable.

  As described above, the blank material forming space provided in the forming die is larger than the artificial nail for manufacturing purposes, and is curved in two directions, the width direction (the direction along the surface of the human nail) and the longitudinal direction. .

  The molding die may include a blank material forming space in which a blank material from which a plurality of nail chips can be cut can be formed by a single molding space.

  Many false nails are not only simply curved in the width direction and the longitudinal direction, but also have a curved surface with a smaller radius of curvature on the toe side. Also in such a case, for example, a space for molding the blank material of the same fingernail of the left and right hands is provided with a blank material molding space having a shape arranged continuously on the same axis, and the blank material is formed in the molding space. When nail is molded, two nail chips to be mounted on the same fingernail of the left and right hands can be cut out from the obtained blank material.

  In addition, it is preferable that the blank material is flattened in the third step so that the front and back of the blank material can be distinguished. For example, if the unevenness of the surface of the molding plate is transferred to the back surface of the blank material by flattening, the front and back of the blank material can be distinguished when decorating the surface depending on the presence or absence of the unevenness. Can do.

  In addition, as photocurable material resin which has the shape memory effect used as a material for artificial nails, for example, there is a product name: MPI-BS-237D manufactured by Makuhari Photochemics Co., Ltd.

  According to the manufacturing method of the present invention, a blank material that is larger in size than the artificial nail for manufacturing purposes and is curved in two directions, the width direction and the longitudinal direction, is formed with a molding die, and the desired shape and size (this) Is not a finished product shape), nail chips of different shapes and sizes can be cut out from blank materials obtained by molding with the same molding die, and the molding die can be shared.

  The common use saves the trouble of exchanging molds and the like, increases the production efficiency, and reduces the number of molds used, thereby lowering the production cost and providing an inexpensive product.

  In addition, material resin is injected into the female blank molding space and then the male mold is combined to mold the material resin with the molding die, so air retention does not occur in the blank molding space and air bubbles are avoided in the product. As a result, the product defect rate is reduced and the manufacturing yield is improved.

  In addition, when cutting out the nail tip from the blank material flattened in the third step by punching using a Thomson blade, a Thomson blade suitable for the target shape and size is required. It is cheaper and easier to make than molds. Therefore, the purpose of lowering the product unit price can be achieved even by cutting out by this method.

It is a perspective view which shows an example of the shaping | molding die utilized for the manufacturing method of this invention. FIG. 2 is a cross-sectional view of the mold of FIG. 1 cut along the line AA of FIG. 1 and a male mold and a female mold of the mold are separated. FIG. 2 is a cross-sectional view of a state in which the mold of FIG. 1 is cut along the line AA of FIG. 1 and a male mold and a female mold of the mold are combined. It is sectional drawing along the BB line of FIG. 1 of the shaping | molding die of FIG. It is a perspective view which shows an example of the clamp apparatus used for holding | maintenance of a shaping | molding die. It is a side view of the clamp apparatus of FIG. It is a perspective view which shows the hardening process of the resin in a shaping | molding die by an ultraviolet curing device. It is a perspective view which shows an example of the blank material taken out from the shaping | molding die. It is a perspective view which shows the process of shape | molding a blank material flatly using a shaping | molding board. It is a top view which shows an example of the planarized blank material, (a) represents an example of the surface, (b) represents an example of the back surface, respectively. It is a top view of the nail | claw chip | tip cut out from the planarized blank material, (a) represents an example of the surface, (b) represents an example of the back surface, respectively. It is a perspective view which shows an example of the finished product of the artificial nail obtained by carrying out shape restoration of the nail | claw chip | tip. It is a perspective view which shows the elastic receiving pad of the cutting device using a Thomson blade. It is sectional drawing which exaggerates and shows the relationship between the elastic receiving pad of FIG. 13, and a Thomson blade.

  Embodiments of a false nail manufacturing method according to the present invention will be described below with reference to FIGS.

  1 to 4 show an example of a mold used in the manufacturing method of the present invention. The illustrated mold 1 includes a male mold 1a and a female mold 1b. The male mold 1a and the female mold 1b are transparent or translucent, have excellent releasability, and are formed of a resin such as polypropylene, which hardly causes adhesion of the material resin of the artificial nail. Polypropylene can increase the releasability of the material resin by adding an appropriate amount of a silicon material, and a material to which the silicon material is added can also be used.

  A blank material forming space 2 (see FIGS. 2 to 4) for forming a blank material having a size larger than the artificial nail for manufacturing purposes is provided between the male die 1a and the female die 1b of the forming die 1. . As shown in FIGS. 2 to 4, the blank material forming space 2 has a width direction (a direction along the line AA in FIG. 1) and a longitudinal direction (a direction along the line BB in FIG. 1). Curved in two directions.

The blank forming space 2 provided in the illustrated mold 1 is for forming a blank material for false nails in which the curvature radius of the curved surface on the toe side is smaller than the curvature radius of the curved surface on the base side of the nail. Thus, on one end side in the longitudinal direction of the space, the curvature radius of the curved surface becomes smaller than the curvature radius on the other end side, and a blank material for artificial nails having good fit can be formed.

  The illustrated mold 1 is provided with five types of blank material forming spaces 2 having different sizes. The five types of blank material forming space 2 are, in order from the left side of FIG. 2, a space for forming the thumb nail blank material, a space for forming the index finger nail blank material, and a middle finger nail blank material. The space for molding, the space for molding the blank material for the false fingernail, and the space for molding the blank material for the pinky fingernail, the sizes of the spaces are different.

  The blank material forming space 2 provided in the illustrated mold 1 is for cutting one nail chip from the obtained blank material, but the mold used is a plurality of blank materials from one blank material. The nail tip may be cut out.

  If the blank material forming space 2 is configured to be able to collectively form false nail blank materials to be attached to the same left and right fingers (two blank material forming spaces having the same shape are connected on the same axis) If it is the blank material forming space of the arranged shape, it is possible to form it at once.) Two nail chips can be cut out from one blank material.

  The mold 1 is preferably provided with a member for positioning the male mold 1a and the female mold 1b. In the illustrated mold 1, as the positioning member 3, the male mold 1 a and the female mold 1 b are provided with the guide pins 3 a illustrated in FIGS. 2 and 3 and the guide holes 3 b for receiving the guide pins, By utilizing this, a combination of a male mold and a female mold can be easily performed.

  The positioning member 3 may be a combination of a concave portion and a convex portion, and is not limited to a guide pin and a guide hole.

  5 and 6 show an example of the clamp device 4 that holds the mold 1. After the mold 1 is inserted into the blank forming space of the female mold 1b and the nail material resin 5 is injected, the male mold 1a is positioned and butted against the female mold 1b. Feed to curing device to cure.

When the work is performed by holding the mold 1 with a clamp device, the work is excellent in stability and easy to work.
Therefore, it is recommended to use the clamping device 4 as shown.

  The illustrated clamping device 4 is provided with a mold support plate 4c on a base 4a via a cushioning material 4b, and a support member having support surfaces on both sides of the mold support plate 4c higher than the upper surface of the mold support plate 4c. 4d is arranged, a toggle clamp 4e is installed on each of the two support members 4d, and a presser frame 4f is connected to a clamp claw of the toggle clamp 4e on one support member 4d. The buffer material 4b serves to protect the mold from the clamping pressure.

  On the mold support plate 4c, there are provided stoppers 4g and 4h for positioning the molding die placed on the mold support plate 4c in two directions.

  Further, the upper surface of the mold support plate 4c is mirror-finished as a preferred form, and the irradiation efficiency can be improved by reflecting the ultraviolet rays irradiated from above the mold placed on the mold support plate 4c.

The clamp device 4 raises the presser frame 4f with the hinge portion of the toggle clamp 4e on the side to which the clamp claws are connected as a fulcrum, and in this state, sets the forming die 1 on the die support plate 4c. Thereafter, the mold retainer frame 4f is tilted down, and the opposite side of the mold retainer frame 4f from the side having the hinge portion is pressed from above with the other toggle clamp 4e.

  Thereby, the shaping | molding die 1 is fixed on the type | mold support plate 4c. Therefore, the mold 1 is sent together with the clamp device 4 to the material resin curing step to cure the material resin 5 in the blank material molding space 2.

  On one side of the mold retainer frame 4f, a bracket may be erected on the support member 4d, and the bracket may be hinged using a simple hinge shaft, but as shown in the figure, the hinge portion of the mold retainer frame 4f Is configured with the toggle clamp 4e, the raising and lowering operation of the presser frame 4f can be stably performed using the operation lever included in the toggle clamp 4e.

  Next, the artificial nail material resin 5 used in the present invention is a photo-curing (ultraviolet curable) resin having a shape memory effect. The product name: MPI-BS-237D manufactured by Makuhari Photochemics Co., Ltd. mentioned above is a dissolved dispersion mixture of acrylic ester, urethane acrylate, silica, alumina and photoinitiator. It can be suitably used as a material resin.

  A required amount of the material resin 5 is injected into the blank material forming space 2 of the female mold 1b using a resin injection machine 6 as shown by a chain line in FIG. 2 (first step).

  Thereafter, as shown in FIG. 3, the male die 1a is butted against the female die 1b, and the molding die 1 thus combined is set in the clamping device 4 as shown in FIGS. At the same time, it is fed into the ultraviolet curing device 7 (see FIG. 7).

The ultraviolet curing device 7 conveys the clamping device 4 in which the mold 1 is set by a conveyor (not shown), and in the middle of the conveyance, from the ultraviolet lamp 7b disposed inside the outer case 7a of the ultraviolet curing device 7. The mold 1 is irradiated with ultraviolet rays from above to cure the material resin 5 in the blank material molding space 2 (second step).

  Note that the entrance and exit of the runway surrounded by the outer case 7a of the ultraviolet curing device 7 are closed by a flexible curtain (not shown) that blocks leakage of ultraviolet rays to the outside. The curtain is installed so as not to obstruct the carry-in and carry-out of the clamp device 4 into the device.

  Next, the blank material 8 (see FIG. 8) formed by curing the material resin 5 is taken out from the mold 1 and the burrs generated in the blank material are removed as necessary, and then the blank material 8 is necessary. It heats to temperature, and as shown in FIG. 9, it clamps with the shaping | molding board 10 which makes two pieces, and makes it a flat shape (3rd process). Although the blank material 8 was heated by a method of heating to about 180 ° C. for 90 seconds in an oven, a flat plate can be formed while being heated by using a hot plate as the forming plate 10.

  In this third step, the back surface of the blank material 8A (see FIG. 10) in which the lower molding plate having a surface with irregularities such as a stripe pattern is used to flatten the surface of the lower molding plate. Can be transferred to.

  When the flat blank material 8A is obtained through the third step, the target nail chip 9 (see FIG. 11) is cut out from the blank material 8A using a cutting device having a Thomson blade or the like (fourth step).

  An example of a cutting device using a Thomson blade is shown in FIGS. As shown in FIG. 14, the Thomson blade 12 is a double-edged cutting blade. The Thomson blade 12 has a cutting edge at a position about 3 mm below the surface of the rubber receiving pad 13. In the punching process using the Thomson blade, that is, the cutting edge of both the blades, the inner portion (12a in FIG. 14) of the cutting edge of the Thomson blade 12 enters the workpiece and compresses the workpiece inward.

  Depending on the degree of compression, there may be a case where wrinkles are formed on the periphery of the nail tip 9 and cutting out with high accuracy is not performed.

  Therefore, the cutting device of FIGS. 13 and 14 is provided with a stealing portion 15 from which the rubber material is removed inside the Thomson blade installation point 14 of the rubber receiving pad 13 that supports the blank 8A. Reference numeral 16 denotes a set groove of the flattened blank material 8 </ b> A, and reference numeral 17 denotes a base board that supports the receiving pad 13. The flattened blank material 8A set in the set groove 16 is pressed down together with the frame having the set groove by the flat pressing tool 18 and is cut by the Thomson blade 12.

  At this time, if there is the stealing portion 15, the meat portion of the receiving pad escapes to the stealing portion 15, and thereby the blank material support area of the receiving pad 13 is displaced toward the center side of the stealing portion 15. The cut point of the blank material 8A compressed in the direction is easy to escape in the direction of absorbing the compression force, whereby the inward compression force is attenuated and the claw tip 9 is cut out with high accuracy.

  The nail chip 9 cut out from the blank material 8 formed with the illustrated mold has a shape and size suitable for the thumb, forefinger, middle finger, ring finger, and little finger, respectively. Only one type of nail tip is shown as a representative example.

  Finally, the nail tip that has undergone the fourth step is restored to a curved state (a shape having a bulge) using the shape memory effect to finish the finished nail 11 (see FIG. 12) (fifth step).

  The curved shape of the nail chip 9 in the fifth step can be restored by a simple method of heating to a predetermined temperature because the material resin 5 having a shape memory effect is used. In the manufacture of the prototype, heating was performed at about 180 ° C. for 15 seconds, but is not limited to this condition.

  In addition, in the flattening process of the blank material by sandwiching it with the molding plate 10, the back surface of the blank material 8 provided with irregularities for the discrimination between the front and back surfaces is the nail chip shape in the fifth process due to the shape memory effect of the material resin. The unevenness on the back surface disappears when the curved shape is restored.

  In such a manufacturing method, decoration such as patterning or coloring by printing is performed on the flat blank material obtained through the third step or the flat nail chip cut out from the flat blank material in the fourth step. it can. Decoration by printing can be done efficiently. If necessary, add the decoration process, send the blank material decorated after obtaining the third process to the fourth process, or finish the nail chip decorated after cutting out in the fourth process to the fifth process Send it in.

  In this method, a mold having a plurality of blank material molding spaces in a set of molds can be used. In terms of product management, it is preferable to use a molding die having five types of blank material molding spaces having different shapes and sizes corresponding to the thumb, index finger, middle finger, ring finger, and little finger.

  The blank material forming space 2 provided in the forming die in the artificial nail manufacturing method described above is larger in size than the artificial nail for manufacturing purposes. Therefore, the nail chips 9 having different sizes can be cut out from the blank material obtained by molding with the same mold, and there is no need to prepare a mold for each size.

  For this reason, the labor of exchanging the mold is saved, and the production efficiency is increased. When cutting nail chips from blanks by cutting with a Thomson blade, it is necessary to replace the Thomson blade according to the size. It can be done by a simple method such as holding the holder and switching the position by rotating the holder.

  Therefore, less labor is required compared to the replacement of the mold. Thomson blades can be easily made at lower cost than molds. As a result, according to the false nail manufacturing method of the present invention, it is possible to provide a low-priced product with higher manufacturing efficiency and lower manufacturing cost than the conventional method.

  In addition, the false nail manufactured by the method of the present invention is attached to the user's own nail using a double-faced nail tape as in the conventional product.

  The artificial nail produced by using the MPI-BS-237D manufactured by Makuhari Photochemics Co., Ltd. as a resin material is softened into a deformable state at a temperature of about 30 ° C. to 35 ° C. Even if the nail does not exactly match the curvature of the user's fingernail (curved shape), mounting the artificial nail on the user's fingernail corrects the deviation of the curved shape according to the user's body temperature and fits It will be excellent.

DESCRIPTION OF SYMBOLS 1 Mold 1a Male mold 1b Female mold 2 Blank material molding space 3 Positioning member 3a Guide pin 3b Guide hole 4 Clamping device 4a Base 4b Buffer material 4c Mold support plate 4d Support member 4e Toggle clamp 4f Mold presser frame 4g, 4h Stopper 5 Material Resin 6 Resin Injection Machine 7 UV Curing Device 7a Outer Case 7b UV Lamp 8 Blank Material 8A Flattened Blank Material 9 Nail Chip 10 Cut from Blank Material Molded Plate 11 Finished Product Nail 12 Thomson Blade 13 Receiving Pad 14 Thomson blade installation point 15 Stealing portion 16 Blank material setting groove 17 Base panel 18 Press

Claims (8)

Blank material molding between the male mold (1a) and the female mold (1b) each made of a transparent or translucent material and having a size larger than the artificial nail for manufacturing purposes and curved in two directions, the width direction and the longitudinal direction A first step of using a mold (1) having a space (2) and injecting a photocurable material resin (5) having a shape memory effect into the blank material molding space of the female mold (1b);
The male mold (1a) and the female mold (1b) are combined, and the state is maintained, and the material resin (5) in the blank material molding space (2) is irradiated with ultraviolet rays from the outside of the molding mold (1). A second step of curing the resin;
A third step of taking out the blank material (8) made by curing the material resin from the mold, and applying heat to form a flat plate with the molding plate (10);
A fourth step of cutting a nail chip (9) having a desired shape and size from a flat blank material;
A method for manufacturing a false nail, wherein the nail tip (9) is restored to a curved state by using a shape memory effect to obtain a finished product.   The false nail manufacturing method according to claim 1, wherein the nail chip (9) is cut out in the fourth step using a cutting device having a Thomson blade.   As the cut-out device, a support pad made of rubber that supports the blank material (8) and having a stealing portion (15) from which the rubber material is removed is provided inside the installation point (14) of the Thomson blade (12). The manufacturing method of the false nail of Claim 2 using this.   The flat blank material (8) obtained through the third step or the nail chip (9) cut out from the flat blank material in the fourth step is decorated by printing, and the blank material or nail chip after decoration The manufacturing method of the false nail in any one of Claims 1-3 which finishes a finished product.   The blank according to any one of claims 1 to 4, wherein the flattening of the blank material (8) in the third step is performed so that the unevenness of the surface of the molding plate is transferred to the back surface of the blank material (8). A method for manufacturing nails.   The false nail manufacturing method according to any one of claims 1 to 5, wherein a plurality of blank material forming spaces (2) are provided in the same die as the forming die (1).   The manufacturing method of the false nail in any one of Claims 1-6 which uses what was formed with the polypropylene as said shaping | molding die (1).   The false nail manufacturing method according to any one of claims 1 to 7, wherein a solution-dispersed mixture of acrylic ester, urethane acrylate, silica, alumina and a photoinitiator is used as the material resin (5).

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