Nail plate and method of manufacturing the same

Abstract

The application discloses a nail plate and a manufacturing method thereof. The nail plate comprises a nail plate base body, the nail plate base body has a first side surface adhering to a nail and a second side surface away from the first side surface, and the second side surface is provided with a reflection groove, the depth of the reflection groove is H, H<=0.1mm, and the reflection groove is used for reflecting light outside the nail plate base body. The nail plate of the application is characterized in that the reflection groove is arranged on the second side surface of the nail plate base body, and the depth of the reflection groove is not greater than 0.1mm. The reflection groove with the depth belongs to a micro groove structure, can reflect light (such as natural light, lamp light and the like) outside the nail plate base body, and after the light is reflected, the light presents colorful colors, so that the second side surface presents colorful colors, and according to the light reflection principle, different colors can be seen from different angles.

Description

Technical Field

[0001] This invention relates to the field of nail technology, specifically to a nail tip and its manufacturing method. Background Technology

[0002] Consumers are increasingly demanding in terms of aesthetics, and are therefore willing to invest more effort in nail care, such as applying nail polish and using nail extensions. Current nail extension colors are generally achieved by controlling the color of raw materials and then applying color coatings or applying colored film layers. However, existing technologies have the following drawbacks: the raw materials have limited color options, preventing the creation of multi-colored effects; the subsequent color application and application of colored film layers increase the complexity of the process, and achieving multi-colored effects requires applying multiple colors of nail polish or creating multi-colored film layers, thus increasing the cost of nail art. Summary of the Invention

[0003] One objective of this invention is to provide a nail art tip whose outer surface reflects external light through reflective grooves to form a variety of colors.

[0004] Another objective of this invention is to provide a method for manufacturing nail art pieces, which is simple to manufacture and can produce nail art pieces with a variety of colors after being manufactured.

[0005] To achieve this objective, the present invention adopts the following technical solution: In a first aspect, a nail tip is provided, comprising a nail tip base, the nail tip base having a first side that conforms to the nail and a second side that is away from the first side, the second side being provided with a reflective groove, the depth of the reflective groove being H, H≤0.1mm, the reflective groove being used to reflect light outside the nail tip base.

[0006] The beneficial effects of this invention are as follows: The nail art tips of this invention feature reflective grooves on the second side of the nail base, with a depth not exceeding 0.1mm. These grooves, being micro-grooves, reflect light from outside the nail base (such as natural light and artificial light), producing a variety of colors. This results in a multi-colored second side, and based on the principle of light reflection, different colors can be seen when viewing the nail art tip from different angles. This invention achieves its multi-colored effect not by changing the material color of the nail base, applying paint, or attaching a colored film, but by utilizing the principle of light reflection to create these micro-reflective grooves, thus enhancing the consumer experience.

[0007] As a preferred option for nail tips, the reflective groove and the nail tip base are integrally injection molded from plastic.

[0008] As a preferred embodiment of nail art tips, the reflective grooves are distributed along a preset shape on the second side, and the preset shape includes at least one of a straight line shape, an arc shape, a ring shape, an ellipse shape, a curved shape, and a polygon shape.

[0009] As a preferred embodiment of nail art tips, the reflective groove is a V-shaped groove, an arc-shaped groove, a square groove, or an irregularly shaped groove; and / or, There are multiple reflective grooves, which are arranged at intervals on the second side surface.

[0010] As a preferred embodiment of nail art tips, the second side is recessed towards the first side to form the reflective groove; and / or... The second side protrudes with a plurality of protrusions, and the reflective groove is formed between any two adjacent protrusions.

[0011] As a preferred embodiment of nail art tips, the nail tip substrate is a dark-colored substrate with a grayscale value of 0-100.

[0012] As a preferred embodiment of nail extensions, the roughness Ra of the second side surface is 0.05μm-0.2μm; and / or, The surface roughness Ra of the reflective groove is 0.05 μm-0.2 μm; and / or, The depth of the reflective groove is H = 0.001 mm.

[0013] As a preferred embodiment of nail art tips, the second side and the inner wall of the reflective groove are both provided with a functional layer, and the thickness of the functional layer is uniform throughout; the thickness of the functional layer is B, where B≤1mm.

[0014] As a preferred embodiment of nail art tips, the functional layer includes a protective layer, which is a transparent layer; or, The functional layer includes a color-changing layer; or, The functional layer includes a color-changing layer and a protective layer sequentially disposed on the second side.

[0015] Secondly, a method for manufacturing nail art tips is provided, for manufacturing the aforementioned nail art tips, comprising: An injection mold is provided, the cavity of the injection mold is polished, the cavity of the injection mold is machined to form a molding structure of injection reflective groove, and the molding structure and the cavity of the injection mold are polished. Clean the surface of the injection mold and the mold cavity; Assemble the injection mold into the injection molding machine; Perform the injection molding process, preheat the injection mold to a first temperature, inject molten injection material into the injection mold, hold pressure for a set time, cool down to a second temperature, open the mold and take out the injection molded nail tip. The outer surface of the nail tip has a reflective groove. Repeat the injection molding process until all nail tips are injection molded. Post-processing involves cooling the injection mold to a third temperature, then cleaning and drying the injection mold, and coating the surface of the injection mold with anti-rust oil. Wherein, the first temperature > the second temperature > the third temperature.

[0016] The beneficial effects of this invention are as follows: This solution utilizes an injection mold to directly form reflective grooves on the outer surface of the nail tip during the injection molding process. The injection molding method reduces the number of steps involved in forming the reflective grooves, improving manufacturing precision. Furthermore, polishing is performed on the injection mold before and after creating the molded structure, enhancing the mirror effect of the overall outer surface of the nail tip (including the inner wall of the reflective groove) after injection molding. This, in turn, improves the reflective effect of the reflective groove, allowing the surface of the nail tip to reflect external light (such as natural light or artificial light) to create a vibrant, multicolored effect. By advancing the injection molding process... Preheating, along with pressure holding and cooling during injection molding, makes the injection-molded nail tips easier to demold, preventing the formation of tiny burrs on the outer surface of the nail tips and the inner wall of the reflective grooves. This ensures a mirror-like effect on the outer surface of the nail tips and the reflective grooves for better reflection, resulting in a variety of colors on the outer surface of the nail tips. By cooling the injection mold to below the demolding temperature of the nail tips before cleaning, cracking and deformation of the injection mold caused by cleaning at high temperatures can be avoided, maintaining the manufacturing precision of the injection mold and extending its service life. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of a nail art piece according to an embodiment of the present invention.

[0018] Figure 2 This is a three-dimensional schematic diagram of a nail art piece according to an embodiment of the present invention from another perspective.

[0019] Figure 3 This is a partial cross-sectional view of a nail art tip according to an embodiment of the present invention.

[0020] Figure 4 This is a three-dimensional schematic diagram of a nail art piece according to another embodiment of the present invention.

[0021] Figure 5 This is a three-dimensional schematic diagram of another embodiment of the nail art nail patch from another perspective.

[0022] Figure 6This is a three-dimensional schematic diagram of another embodiment of the nail art nail tip according to the present invention.

[0023] Figure 7 This is an exploded view of a nail tip according to another embodiment of the present invention.

[0024] Figure 8 This is a partial cross-sectional view of a nail tip according to another embodiment of the present invention.

[0025] In the picture: 1. Aperture substrate; 11. First side surface; 12. Second side surface; 2. Reflective groove; 3. Functional layer; 31. Groove structure; 4. Marking. Detailed Implementation

[0026] Reference Figure 1 and 2 As shown, the nail tips of this invention can be attached to fingernails or toenails, and are not limited to human nails; they can also be attached to animal nails. The object being processed is not limited here. For ease of description, the finger is used as the object being processed in the following description.

[0027] Reference Figures 1 to 3 As shown, the nail art tip of this embodiment includes a nail art base 1. The nail art base 1 has a first side 11 that conforms to the nail and a second side 12 that is away from the first side 11. The second side 12 is provided with a reflective groove 2, the depth of which is H, where H ≤ 0.1 mm. The reflective groove 2 is used to reflect light from outside the nail art base 1. In this embodiment, the nail art tip provides a reflective groove 2 on the second side 12 of the nail art base 1, and the depth of the reflective groove 2 is no greater than 0.1 mm. This depth of reflective groove 2 constitutes a micro-groove structure, which can reflect light (such as sunlight, lamplight, etc.) from outside the nail art base 1. After reflection, the light will display various colors, making the second side 12 appear multicolored. Furthermore, according to the principle of light reflection, different colors can be seen when viewing this nail art tip from different angles. The nail art tip of this invention does not achieve multicolored effects by changing the material color of the nail art base 1, applying color, or attaching a colored film layer. Instead, it utilizes the principle of light reflection to form a micro-reflective groove 2, thus enhancing the consumer experience.

[0028] Further, the depth H of the reflective groove 2 can be 0.001mm, 0.002mm, 0.003mm, 0.004mm, 0.005mm, 0.006mm, 0.007mm, 0.008mm, 0.009mm, 0.01mm, 0.015mm, 0.02mm, 0.025mm, 0.03mm, 0.035mm, 0.04mm, 0.045mm, 0.05mm, 0.055mm, 0.06mm, 0.065mm, 0.07mm, 0.075mm, 0.08mm, 0.085mm, 0.09mm, 0.095mm, and 0.1mm. Preferably, the depth H of the reflective groove 2 is 0.001mm. The depth of the reflective groove 2 should not be too deep. If it is too deep, some of the external light entering the reflective groove 2 will be trapped inside, making it difficult for direct light to escape. This will significantly reduce the intensity of the specular reflection, causing the second side 12 of the substrate 1 to become dark and dull. Furthermore, multiple diffuse reflections and inner wall side reflections will lengthen the light path, increase light energy loss, and reduce the overall brightness of the reflection. In summary, if the depth of the reflective groove 2 is too deep, it will result in light trapping, light absorption, and light scattering. The weaker the positive reflection, the worse the gloss, and the less likely it is to form a glossy finish. The reflective groove 2 should not be too shallow. If it is too shallow, light cannot be effectively reflected within it and will only be reflected on the second side 12. Without the light control provided by the groove, the light undergoes only a single specular reflection, resulting in very low diffuse reflection. The surface becomes too smooth, causing oblique light to overflow, leading to problems such as poor focusing, significant scattering, glaring highlights, and uneven reflection. Consequently, the second side 12 of the nail plate substrate 1 will be blocked by glaring light, preventing the display of vibrant colors. In this embodiment, the depth of the reflective groove 2 is designed to be 0.001mm, achieving optimal reflection and ensuring that the outer surface of the nail plate has suitable brightness while displaying a variety of colors, with more pronounced colors.

[0029] In this embodiment, the reflective groove 2 and the nail plate substrate 1 are integrally injection molded from plastic. By integrally injection molding the reflective groove 2 and the nail plate substrate 1 from plastic, the difficulty of molding the micro-reflective groove 2 on the outer surface of the nail plate substrate 1 can be reduced. Furthermore, injection molding results in high precision for the reflective groove 2, making it easier to achieve a better reflective effect, thereby allowing the nail art to display a variety of colors. In other embodiments, the reflective groove 2 can also be formed using other molding methods. For example, after injection molding the nail plate substrate 1, the reflective groove 2 can be processed on the nail plate substrate 1 using a laser.

[0030] In one embodiment, the reflective grooves 2 are distributed along a preset shape on the second side 12. The preset shape includes at least one of a straight line shape, an arc shape, a ring shape, an ellipse shape, a curved shape, and a polygon shape. The shape of the reflective grooves 2 distribution does not affect the presentation of colorful colors, but can present different pattern effects. For example, a flower shape or an animal shape composed of straight lines, arc shapes, and rings.

[0031] In this embodiment, as Figures 1 to 3 As shown, multiple reflective grooves 2 are distributed on the second side 12, and these grooves 2 are evenly distributed in multiple rows and columns on the second side 12. The evenly distributed dot-shaped reflective grooves 2 can form a uniform reflective effect on the second side 12, allowing the entire second side 12 to display a variety of colors, thus making the nail art more dazzling.

[0032] Furthermore, the reflective groove 2 is a V-shaped groove, meaning its cross-section is V-shaped. In cross-section, the bottoms of the two groove walls intersect at a point or along a straight line, while the tops of the two groove walls are spaced apart at the groove opening. Both groove walls are inclined. By designing the reflective groove 2 as a V-shaped structure, the color rendering effect is enhanced, and the brightness of the second side 12 of the nail plate base 1 is increased. Specifically, after external light enters the V-shaped reflective groove 2, it undergoes multiple reflections between the two inclined groove walls. Compared to flat groove walls, more light is directed to the observable direction, reducing direct light transmission or loss. This improves the utilization rate of reflected light, enhances color saturation and brightness, and creates a "shimmering and / or flowing luster" effect. At different viewing angles, light reflects from different groove walls, producing dynamically changing highlights, similar to the facets of a diamond, making the outer surface of the nail art more dazzling. In addition, the V-shaped reflective groove 2 facilitates demolding during injection molding. This structure naturally possesses a draft angle, and the inclined groove walls reduce friction with the injection mold, significantly lowering demolding resistance and reducing problems such as tearing, whitening, deformation, and burrs. Furthermore, during injection molding, this type of groove structure improves filling performance, preventing the formation of "dead zone bubbles" in the molten plastic at this location, resulting in more continuous flow and improved molding integrity. The V-shaped reflective groove 2 also reduces stress concentration. Its bottom is a confluence pattern rather than a flat bottom, avoiding stress concentration points such as right angles and sharp corners, thus improving structural strength and reducing the risk of cracking. Finally, the V-shaped reflective groove 2 reduces the molding difficulty of the injection mold, making it easier to process, lowering manufacturing costs, and achieving higher processing precision and consistency. In other embodiments, the reflective groove 2 can also be an arc-shaped groove, a square groove, or an irregularly shaped groove.

[0033] In one embodiment, the second side surface 12 is recessed towards the first side surface 11 to form a reflective groove 2. The reflective groove 2, formed directly in recessed on the second side surface 12, reduces the amount of injection molding material used and lowers manufacturing costs. In this structure, the molding structure processed within the injection mold cavity is an outwardly protruding structure, and the height of the outwardly protruding molding structure is consistent with the depth of the reflective groove 2. In other embodiments, the second side surface 12 has multiple protrusions, with a reflective groove 2 formed between any two adjacent protrusions. In this structure, the molding structure processed within the injection mold cavity is a concave structure, and the depth of the concave molding structure is the height of the protrusions outward from the second side surface 12, with the height of the protrusions consistent with the depth of the reflective groove 2. Alternatively, the second side surface 12 may have both inwardly formed reflective grooves 2 and outwardly protruding reflective grooves 2.

[0034] In one embodiment, the apron substrate 1 is a dark substrate with a grayscale value of 0-100. By setting the apron substrate 1 to a dark substrate, the light reflected by the reflective groove 2 on the second side 12 of the apron substrate 1 is more likely to form colorful patterns, resulting in higher contrast and easier presentation of the colorful patterns formed on the second side 12.

[0035] In this embodiment, the substrate 1 of the apron is black. Black has a grayscale value of 0, and its contrast is the highest among all colors. In other embodiments, the substrate 1 of the apron can also be set to other colors, such as dark green (grayscale value 47), dark green (grayscale value 35), dark grass green (grayscale value 59), or dark forest green (grayscale value 96).

[0036] In one embodiment, the roughness Ra of the second side surface 12 is 0.05-0.2 μm, and the roughness Ra of the reflective groove 2 is 0.05-0.2 μm. At this roughness, the second side surface 12 and the reflective groove 2 have a near-mirror-like reflective effect, achieving the highest reflectivity. This allows the colorful colors on the outer surface of the nail art tip to be more transparent, brighter, and more saturated due to reflection. Combined with the V-shaped reflective groove 2, it can also create a distinct shimmering, faceted effect. The roughness cannot be too large. For example, when the roughness Ra reaches 0.3-0.8 μm, it is easy to produce uniform diffuse reflection, presenting a soft or high-end matte texture. Although it is not dazzling, it will weaken the vibrancy of the colors. The roughness also cannot be too small. For example, when it is less than 0.03 μm, it is easy to have difficulty in demolding (due to the phenomenon of vacuum adsorption), and scratches are obvious, increasing the cost of injection molds. The roughness Ra of the second side surface 12 and the reflective groove 2 can be 0.05μm, 0.06μm, 0.07μm, 0.08μm, 0.09μm, 0.1μm, 0.11μm, 0.12μm, 0.13μm, 0.14μm, 0.15μm, 0.16μm, 0.17μm, 0.18μm, 0.19μm or 0.2μm. Preferably, the roughness Ra of the second side surface 12 and the reflective groove 2 is 0.05μm. This roughness can reduce diffuse reflection, improve the effect of directional light reflection, meet the requirements of colorful color presentation, and reduce the difficulty of injection molding and the cost of injection mold.

[0037] In one embodiment, such as Figures 4 to 8 As shown, functional layers 3 are provided on the inner walls of both the second side 12 and the reflective groove 2, and the thickness of the functional layers 3 is uniform throughout. When the uniformly thick functional layers 3 are provided on the outer surface of the nail art piece (i.e., the inner walls of the second side 12 and the reflective groove 2), the outer surface of the functional layers 3 can still form a groove structure 31 at the position corresponding to the reflective groove 2, without filling the reflective groove 2. The depth of the groove structure 31 can be designed to be consistent with the depth of the reflective groove 2, or it can be designed to be less than the depth of the reflective groove 2. If the functional layer 3 is a light-colored structure that is easy to transmit light, then the light will pass through the functional layer 3 and the inner wall of the reflective groove 2 and be reflected, without affecting the colorful appearance of the outer surface of the nail art piece; if the functional layer 3 is a dark-colored structure that is not easy to transmit light, then the groove structure 31 formed by the functional layer 3 at the position corresponding to the reflective groove 2 will replace the reflective groove 2 to reflect external light, and can also display colorful appearance on the outer surface of the nail art piece.

[0038] In this embodiment, the functional layer 3 includes a protective layer, which is a transparent layer. The protective layer provides effective protection for the nail plate substrate 1, preventing external oil and dust from clogging the reflective groove 2 on the second side 12 of the nail plate substrate 1, thereby ensuring that the outer surface of the nail plate can smoothly form colorful colors. By setting the protective layer to a transparent layer, it is easy for external light to pass through the protective layer and be reflected at the reflective groove 2.

[0039] In other embodiments, functional layer 3 includes a color-changing layer. The color-changing layer can alter the color of the nail tip substrate 1, providing consumers with more color choices. The color change, combined with the reflective colors, creates better color combinations and a more vibrant effect. Furthermore, the color-changing layer can be applied to the second side 12 of the nail tip substrate 1 by pasting, printing, or electroplating. If electroplating is used, metal can be electroplated as the color-changing layer, i.e., the color-changing layer is a metallic layer. The metallic layer can improve color saturation and gloss because the metallic layer (such as Al, Cr, Ni, etc.) has high reflectivity. Light is no longer absorbed by the plastic nail tip substrate 1, but instead undergoes a specular reflection effect at the metallic layer, significantly enhancing the brightness of the nail art and giving the color a more saturated metallic texture. In addition, the metal layer, as a color-changing layer, can also improve the coverage. The metal layer is basically opaque and can cover up defects in the nail base 1 during injection molding, such as marks and color differences. Because the metal layer has weather resistance and UV protection, it can reflect and block ultraviolet rays, which can delay the fading of the nail art color and extend the overall appearance life of the nail art. The metal layer has high hardness, high wear resistance, and the surface is more scratch-resistant and less prone to losing its shine.

[0040] In other embodiments, the functional layer 3 includes a color-changing layer and a protective layer sequentially disposed on the second side surface 12. That is, a stacked color-changing layer and a protective layer are sequentially disposed on the second side surface 12 of the substrate 1.

[0041] In this embodiment, the thickness of the functional layer 3 is B1, where B1 ≤ 1 mm. The core impact of the thickness of the functional layer 3 on optical performance lies in the degree to which the structure of the reflective groove 2 is preserved. When the thickness of the functional layer 3 is too large, it will fill or passivate the reflective groove 2, thereby destroying the reflection path of the reflective groove 2 and weakening or even eliminating the optical enhancement effect that the reflective groove 2 should have. In this embodiment, when the thickness of the functional layer 3 is controlled to be no greater than 1 mm, the structure of the reflective groove 2 will not be destroyed (that is, the surface of the functional layer 3 corresponding to the position of the reflective groove 2 can still form a groove structure 31 of sufficient depth to replace the reflective groove 2 for light reflection), thus maintaining the optical enhancement effect of the reflective groove 2 and ensuring that the outer surface of the nail art tip can form colorful patterns. Optionally, the thickness of functional layer 3 is 5μm-200μm. Preferably, the thickness of functional layer 3 is 10μm-100μm, and can be 10μm, 12μm, 15μm, 16μm, 18μm, 20μm, 22μm, 24μm, 25μm, 26μm, 28μm, 30μm, 32μm, 34μm, 35μm, 36μm, 38μm, 40μm, 42μm, 44μm, 45μm, 46μm, 4 8μm, 50μm, 52μm, 54μm, 55μm, 56μm, 58μm, 60μm, 62μm, 64μm, 65μm, 66μm, 68μm, 70μm, 72μm, 74μm, 7 5μm, 76μm, 78μm, 80μm, 82μm, 84μm, 85μm, 86μm, 88μm, 90μm, 92μm, 94μm, 95μm, 96μm, 98μm or 100μm.

[0042] In one embodiment, such as Figure 2 As shown, the first side 11 of the nail tip base 1 is provided with a mark 4, which can be a number or a letter. By setting the mark 4, the model of the nail tip base 1 can be indicated, making it easier for users to quickly select the nail tip that suits them.

[0043] In this embodiment, the mark 4 on the apron substrate 1 is integrally injection molded with the apron substrate 1 and the reflective groove 2. The mark 4 can protrude outward from the first side surface 11 or be recessed inward from the first side surface 11.

[0044] In one embodiment, such as Figure 8As shown, the overall thickness of the nail tip is B2, where B2 ≤ 3mm. Specifically, the overall thickness B2 of the nail tip can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, and 3mm. Preferably, B2 = 1mm.

[0045] Reference Figure 1 and 2 As shown, this embodiment of the invention also provides a method for manufacturing nail art pieces, used to manufacture nail art pieces as described in any of the above embodiments, comprising the following steps: Step S100: Provide an injection mold, polish the cavity of the injection mold, machine the cavity of the injection mold to form the molding structure of the injection reflective groove 2, and polish the molding structure and the cavity of the injection mold. Step S200: Clean the surface of the injection mold and the mold cavity; Step S300: Assemble the injection mold into the injection molding machine; Step S400: Perform the injection molding process, preheat the injection mold to the first temperature, inject molten injection material into the injection mold, hold pressure for a set time, cool down to the second temperature, open the mold and take out the injection molded nail art piece. The outer surface of the nail art piece has a reflective groove 2. Repeat the injection molding process until all nail art pieces are injection molded. Step S500, post-processing: cool the injection mold to the third temperature, then clean and dry the injection mold, and apply anti-rust oil to the surface of the injection mold; wherein, the first temperature > the second temperature > the third temperature.

[0046] The beneficial effects of this invention are as follows: In the nail tip injection molding process, this solution utilizes an injection mold to directly form reflective grooves 2 on the outer surface of the nail tip. The injection molding method reduces the number of steps required to form the reflective grooves 2, improving manufacturing precision. Furthermore, polishing is performed on the injection mold before and after creating the molded structure, enhancing the mirror-like effect of the overall outer surface of the nail tip after injection molding. This, in turn, improves the reflective effect of the reflective grooves 2, allowing the surface of the nail tip to reflect external light (such as natural light or artificial light) through the reflective grooves 2, creating a variety of color effects. By performing polishing before injection molding… Preheating, along with pressure holding and cooling during injection molding, makes the injection-molded nail tips easier to demold, preventing the formation of tiny burrs on the outer surface of the nail tips and the inner wall of the reflective groove 2. This ensures that the outer surface of the nail tips and the reflective groove 2 form a mirror effect for better reflection, resulting in a variety of colors on the outer surface of the nail tips. By cooling the injection mold to below the demolding temperature of the nail tips before cleaning, cracking and deformation of the injection mold caused by cleaning at high temperatures can be avoided, maintaining the manufacturing precision of the injection mold and extending its service life.

[0047] In this embodiment, the first temperature is 130℃-150℃, and the first temperature can be 130℃, 131℃, 132℃, 133℃, 134℃, 135℃, 136℃, 137℃, 138℃, 139℃, 140℃, 141℃, 142℃, 143℃, 144℃, 145℃, 146℃, 147℃, 148℃, 149℃ and 150℃. By preheating the injection mold to 130℃-150℃, the molten plastic does not cool down rapidly when it enters the mold, resulting in smooth fusion, a flawless appearance, improved surface finish of the nail tips, significantly reduced internal stress, and effective prevention of cracking later. Preheating the injection mold also ensures uniform and stable mold temperature, allowing for smaller dimensional tolerances during batch injection molding of nail tips. The dimensions of the micro-reflective grooves on the nail tips can be precisely maintained, ensuring high quality and reliability. Furthermore, since molten plastic is generally at high temperatures, preheating the injection mold also avoids significant thermal shocks, effectively extending the mold's lifespan.

[0048] The second temperature is 80℃-100℃, and can be 80℃, 81℃, 82℃, 83℃, 84℃, 85℃, 86℃, 87℃, 88℃, 89℃, 90℃, 91℃, 92℃, 93℃, 94℃, 95℃, 96℃, 97℃, 98℃, 99℃, and 100℃. This second temperature is the demolding temperature of the injection mold. Maintaining the demolding temperature at 80℃-100℃ prevents a rapid drop in the preheating temperature of the injection mold, avoiding excessive time required for the mold to reach the preheating temperature after mold closing. Furthermore, at this demolding temperature, the dimensions of the nail art pieces (including the dimensions of the reflective groove 2) can be quickly locked, and the cooling rhythm of the nail art pieces inside and out is even, resulting in consistent shrinkage at different thicknesses. This prevents the nail art pieces from bending, twisting, or deforming during demolding.

[0049] The third temperature should not exceed 60℃, preferably between 45℃ and 60℃. The third temperature can be 45℃, 46℃, 47℃, 48℃, 49℃, 50℃, 51℃, 52℃, 53℃, 54℃, 55℃, 56℃, 57℃, 58℃, 59℃, and 60℃. Cleaning the injection mold at a temperature not exceeding 60℃ effectively reduces thermal shock, thus preventing cracking and deformation, ensuring manufacturing precision, and extending service life. Furthermore, this third temperature is close to the temperature at which the injection mold is demolded, reducing cooling time and accelerating subsequent cleaning, drying, and rust-preventive oil application, effectively preventing rust.

[0050] The set time (i.e., the holding pressure time during the injection molding process) is 10-15 seconds, with options including 10s, 11s, 12s, 13s, 14s, and 15s. By setting the holding pressure time to 10-15 seconds during the injection molding process, the molten plastic in the mold has sufficient time to fill the shrinkage voids, compacting the molten plastic, reducing air bubbles and voids inside the nail art pieces, improving the density of the nail art pieces, and controlling a uniform holding pressure time results in more even shrinkage and better dimensional consistency in mass-produced nail art pieces. In addition, nail art pieces will not develop burrs or flash due to excessive holding pressure, thus improving the injection molding quality of the nail art pieces.

[0051] In this embodiment, before machining the forming structure on the injection mold, the mold cavity of the injection mold is polished twice, and the precision of the first polishing is controlled to be lower than that of the second polishing. Through the two polishing processes, the first polishing process can quickly remove machining marks, spark marks, and unevenness to unify the base surface. The second polishing process can refine and brighten the surface, leaving no rough marks and resulting in a uniform and delicate texture. The two polishing processes can ensure that the injection mold is subjected to uniform force, the mold cavity of the injection mold is not easily deformed, the edges and corners are clear, and high precision is guaranteed. If only one polishing is used, coarse scratches cannot be completely eliminated, deep tool marks and sanding marks cannot be covered, and it is not easy to control the overall flatness of the mold cavity of the injection mold in one polishing process. It is also easy to cause deformation of the mold cavity of the injection mold, which not only affects the precision of the injection molding of the nail tip base 1, but also reduces the precision of the forming structure, thereby reducing the manufacturing precision of the reflective groove 2 and affecting the subsequent reflective effect.

[0052] The molding structure on the injection mold can be engraved using laser engraving technology. Laser engraving offers high precision, fast manufacturing speed, and makes it easier to create miniature molding structures, meeting the requirement of forming miniature reflective grooves 2 (depth H≤0.1mm) on nail tips. In this embodiment, the molding structure can be a convex structure, a concave structure, or a combination of both, depending on the actual structure of the reflective groove 2 on the nail tip. If the reflective groove 2 is concave on the second side 12 of the nail tip base 1, a convex structure is chosen as the molding structure. If the reflective groove 2 is formed by an adjacent convex portion on the second side 12 of the nail tip base 1, a concave structure is chosen as the molding structure.

[0053] In one embodiment, step S200, cleaning the surface of the injection mold and the mold cavity, specifically includes the following steps: Step S210: Rinse the injection mold with pressurized cleaning fluid, which is preheated to the third temperature. Step S220: Use a high-pressure air gun to spray clean gas to dry the surface of the injection mold.

[0054] Cleaning the injection mold with a cleaning fluid at a third temperature—lower than the temperature at which the mold is demolded—prevents cracking and deformation, ensuring manufacturing precision and extending its lifespan. The heated cleaning fluid also enhances cleaning power, effectively removing oil stains and impurities from the mold surface. High-pressure air guns are used to spray clean gas to dry the mold, accelerating drying in all areas and increasing the drying rate. This shortens the time the mold is in contact with the cleaning fluid, facilitating subsequent application of rust-preventive oil and effectively preventing rust.

[0055] In one embodiment, in step S400, the initial 3-5 injection-molded nail art pieces are inspected piece by piece. The parameters inspected include size, gloss, pattern clarity, and color compliance after light is reflected from the reflective groove 2. If the inspection is satisfactory, mass production can proceed. If the first 10 injection-molded nail art pieces fail to meet the standards, the injection mold needs to be disassembled, and the mold adjusted according to the substandard parameters. After adjustment, steps S200 to S400 are repeated to inspect the initial 3-5 injection-molded nail art pieces piece by piece again.

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention. The various embodiments described herein can be implemented independently, or, where technically feasible, combined with one or more features from other embodiments.

Claims

1. A type of nail art tip, characterized in that, The nail plate includes a nail plate base, which has a first side that conforms to the nail and a second side that is away from the first side. The second side is provided with a reflective groove, the depth of which is H, where H ≤ 0.1 mm. The reflective groove is used to reflect light from outside the nail plate base.

2. The nail tip according to claim 1, characterized in that, The reflective groove and the armor plate substrate are integrally injection molded from plastic.

3. The nail tip according to claim 1, characterized in that, The reflective grooves are distributed on the second side along a preset shape, which includes at least one of a straight line shape, an arc shape, a ring shape, an ellipse shape, a curved shape, and a polygon shape.

4. The nail tip according to claim 1, characterized in that, The reflective groove is a V-shaped groove, an arc-shaped groove, a square groove, or an irregularly shaped groove; and / or, There are multiple reflective grooves, which are arranged at intervals on the second side surface.

5. The nail tip according to any one of claims 1 to 4, characterized in that, The second side is recessed toward the first side to form the reflective groove; and / or, The second side protrudes with a plurality of protrusions, and the reflective groove is formed between any two adjacent protrusions.

6. The nail tip according to any one of claims 1 to 4, characterized in that, The substrate of the apron is a dark-colored substrate, and the grayscale value of the substrate is 0-100.

7. The nail tip according to any one of claims 1 to 4, characterized in that, The surface roughness Ra of the second side is 0.05 μm-0.2 μm; and / or, The surface roughness Ra of the reflective groove is 0.05 μm-0.2 μm; and / or, The depth of the reflective groove is H = 0.001 mm.

8. The nail tip according to any one of claims 1 to 4, characterized in that, The second side surface and the inner wall of the reflective groove are both provided with a functional layer, and the thickness of the functional layer is uniform throughout; the thickness of the functional layer is B, and B≤1mm.

9. The nail tip according to claim 8, characterized in that, The functional layer includes a protective layer, which is a transparent layer; or, The functional layer includes a color-changing layer; or, The functional layer includes a color-changing layer and a protective layer sequentially disposed on the second side.

10. A method for manufacturing nail tips, characterized in that, For manufacturing nail tips as described in any one of claims 1 to 9, comprising: An injection mold is provided, the cavity of the injection mold is polished, the cavity of the injection mold is machined to form a molding structure of injection reflective groove, and the molding structure and the cavity of the injection mold are polished. Clean the surface of the injection mold and the mold cavity; Assemble the injection mold into the injection molding machine; Perform the injection molding process, preheat the injection mold to a first temperature, inject molten injection material into the injection mold, hold pressure for a set time, cool down to a second temperature, open the mold and take out the injection molded nail tip. The outer surface of the nail tip has a reflective groove. Repeat the injection molding process until all nail tips are injection molded. Post-processing involves cooling the injection mold to a third temperature, then cleaning and drying the injection mold, and coating the surface of the injection mold with anti-rust oil. Wherein, the first temperature > the second temperature > the third temperature.

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