Press head production method, press head production system, and press head

Abstract

A method for producing a press head that is used to press a solid cosmetic product during the production process thereof, the method comprising: a step for creating three-dimensional model data that includes information of a pressing face corresponding to a relief pattern to be formed on the surface of the solid cosmetic product; and an integral molding step for integrally molding a press head having the pressing face corresponding to the relief pattern, by creating slice data through slicing of the three-dimensional data in round slices and then by solidifying a metal material in the form of a powder or a fluid in accordance with the slice data.

Description

METHOD FOR MANUFACTURING PRESS HEAD, MANUFACTURING SYSTEM FOR PRESS HEAD, AND PRESS HEAD

[0001] The present invention relates to a method for manufacturing a press head that presses solid cosmetics in the manufacturing process, a press head manufacturing system, and a press head.

[0002] In the process of producing a solid cosmetic product by solidifying powder, a metal press head having suction holes formed therein is generally used when suction pressing the surface of a slurry cosmetic product.

[0003] Furthermore, there is an increasing demand for forming textured patterns on the surface of solid cosmetics, and as a method of forming a textured pattern, Patent Document 1 discloses a configuration in which an elastic body having textured surfaces is provided below a metal portion in a press head. Patent Document 2 discloses a press head configuration in which a resin pattern-imparting member having textured surfaces is provided further below the elastic body.

[0004] Furthermore, in the case of limited edition products or customized products with engraved names, etc., there is a demand for providing arbitrary textured decoration on the surface of a minimum of one or a small number of solid cosmetics.

[0005] On the other hand, in a press head configured by combining a metal press base with an elastic body, the suction hole may become blocked due to elastic deformation of the elastic body. Therefore, Patent Document 3 proposes adjusting the diameter of the suction hole so that it will not become blocked.

[0006] Japanese Patent Application Publication No. 8-154732 Japanese Patent Application Publication No. 2016-175843 Japanese Patent Application Publication No. 2012-188361

[0007] However, if an elastic body is provided as in Patent Document 1, or if a separate pattern-imparting member is provided in addition to the elastic body as in Patent Document 2, in order to impart a pattern to the cosmetic material, the number of parts in the press head increases, which in turn increases the number of manufacturing steps and increases manufacturing costs.

[0008] Furthermore, when applying a specific uneven pattern to a small number of solid cosmetic products, creating a mold to mold an elastic body or pattern-imparting member corresponding to the pattern requires costs, which increases manufacturing costs and makes each solid cosmetic product expensive.

[0009] In view of the above circumstances, the present invention aims to provide a method for manufacturing a press head that can impart various textured patterns to the surface of a solid cosmetic material without increasing the number of parts such as elastic bodies.

[0010] In order to solve the above-mentioned problems, one aspect of the present invention provides a method for manufacturing a press head that presses a solid cosmetic product during its production, the method comprising: a step of designing three-dimensional model data that includes information about a press surface that corresponds to a textured pattern to be applied to the surface of the solid cosmetic product; and an integrated manufacturing step of slicing the three-dimensional model data into slices to create slice data, and solidifying a metal material in a powder or fluid state in accordance with the slice data, thereby integrally manufacturing a press head having a press surface that corresponds to the textured pattern.

[0011] According to the press head manufactured by the method for manufacturing a press head of one aspect, it is possible to impart various uneven patterns to the surface of a solid cosmetic material without increasing the number of parts such as elastic bodies.

[0012] 1 is a schematic cross-sectional view of a press head according to one embodiment of the present invention; 2 is a schematic block diagram of a press head manufacturing system according to the present invention; 3 is a flowchart showing a method for manufacturing a press head according to the present invention; 4 is an explanatory diagram of a molding process of a press head of the present invention in a 3D printer; 5 is an explanatory diagram of a molding process (another example) of a press head of the present invention in a 3D printer; 6 is a diagram showing an example of a press surface of a press head according to one embodiment of the present invention; 7 is a schematic cross-sectional view of a press head according to another embodiment of the present invention; 8 is a flowchart showing a method for manufacturing a solid cosmetic product using a press head manufactured by the manufacturing method of the present invention; 9 is a diagram showing a state in which a cosmetic tray is positioned below the press head in a press device; 10 is a diagram showing a state in which a cosmetic product is being pressed; 11 is a diagram showing a state in which the press head has been raised due to demolding; 12 is a schematic cross-sectional view showing an example of a solid cosmetic product released after production.

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following describes embodiments of the present invention with reference to the accompanying drawings. In the following drawings, the same components are designated by the same reference numerals, and redundant explanations may be omitted.

[0014] The present invention relates to a method for manufacturing a press head used in the production of solid cosmetics, which is used for pressing in the production process of the solid cosmetics, a press head manufacturing system, and a press head.

[0015] <Configuration of Press Head> First, the configuration of a press head according to one embodiment of the present invention will be described with reference to Fig. 1. Fig. 1 is a schematic cross-sectional view of a press head according to one embodiment of the present invention.

[0016] The press head 44 is an example of a pressing member (also called a press die or a pressing mold) that presses and shapes the pre-solidified cosmetic material, ie, the slurry, to form three-dimensional irregularities on the surface.

[0017] As shown in FIG. 1, the press head 44 has a press surface 44a having a decorative pattern (concave and convex shape) to be transferred to the slurry 2 (see FIG. 9), and a back surface 44c facing the press surface 44a. A plurality of through-holes 44b are formed so as to penetrate the press surface 44a and the back surface 44c. The shape of the press surface 44a in plan view may be substantially rectangular, as shown in FIG. 6 (described later), or a polygonal shape such as a triangle or pentagon, or a shape including curves such as a circle or ellipse. FIG. 1 shows a cross section taken along a plane perpendicular to the press surface 44a.

[0018] The concave and convex shape formed on the press surface 44a is designed according to the decorative shape to be formed on the solid cosmetic material. The jagged shape shown in Fig. 1 is one example, and the decorative shape of the press surface of the present invention may be other shapes.

[0019] One end of the through holes 44b opens to the press surface 44a, and the other end opens to the back surface 44c of the press head 44. The through holes 44b are arranged so as to open at a substantially uniform density on the press surface 44a, and during pressing, they serve as vent holes (suction holes) through which gas (air) and liquid pass between the space between the press head 44 and an inner plate 30 (see FIG. 9 ), which will be described later, and the outer space (upper space) of the press head.

[0020] The press head 44 with through holes shown in FIG. 1 is used in the main pressing step of the production flow of a solid cosmetic material, which will be described later.

[0021] The diameter of the through holes 44b is 10 μm to 1000 μm. Of these, when the slurry and the press head are brought into direct contact as described below, the diameter of the through holes 44b is preferably 80 μm to 200 μm, and more preferably 100 μm to 150 μm. If the diameter of the through holes 44b is 50 μm to 300 μm, even when a slurry-like raw material is filled between the inner plate 30 and the press head 44, the slurry can be prevented from entering the vicinity of the opening of the through holes 44b, and the shape of the through holes 44b can be prevented from remaining on the surface of the solid cosmetic material facing the press surface 44a.

[0022] The ratio of the spacing between the through holes 44b to the size of the through holes 44b is preferably 4:1 to 2:3. The spacing between the through holes 44b refers to the center-to-center distance between adjacent through holes 44b. When the ratio of the spacing between the through holes 44b to the size of the through holes 44b is within the above-described preferred range, the strength of the press head 44 is prevented from decreasing, and the durability of the press head 44 can be maintained. Furthermore, when the ratio of the spacing between the through holes 44b to the size of the through holes 44b is within the above-described preferred range, the amount of air required to separate the contact surfaces between the press surface 44a and the semi-dried compact 3 (see Figures 10 and 11) is easily supplied when compressed air is supplied through the through holes 44b. The spacing between the through holes 44b varies depending on the size of the through holes 44b, but a narrower spacing is preferable. For example, when the size of the through holes 44b is 100 μm, the spacing between adjacent through holes 44b is preferably 200 μm to 250 μm.

[0023] <Press Head Manufacturing System> A press head manufacturing system according to one embodiment of the present invention will now be described with reference to Fig. 2. Fig. 2 is a schematic block diagram of the press head manufacturing system of the present invention.

[0024] 2 , the press head manufacturing system 1 of the present invention includes an information processing device (sometimes referred to as a first information processing device) 11 and a 3D printer 12. The press head manufacturing system 1 may further include a second information processing device 13.

[0025] In the press head manufacturing system 1, the first information processing device 11 and the 3D printer 12 are connected to each other so that information can be exchanged via wire or wirelessly.

[0026] The first information processing device 11 is a data conversion device that acquires design data including decorative information of the press surface as shape information of the press head 44 by inputting or receiving the design data and converts the design data into 3D model data for a 3D printer.

[0027] The 3D printer 12 is a three-dimensional metal modeling device that uses metal powder or liquid metal to create a three-dimensional press head shape. Specifically, the 3D printer 12 melts and solidifies powder or liquid metal material layer by layer according to 3D model data (integral modeling). Examples of powder or liquid metal materials that can be used with the 3D printer 12 include aluminum, nickel, iron, cobalt, copper, and tungsten, with stainless steel or titanium being preferred.

[0028] The modeling material may be not only pure metal or metal containing an alloy, but also synthetic resin, etc. The 3D printer 12 may be a selective laser sintering (SLS) method, in which a powdered metallic material (raw material) is irradiated with a laser to sinter it, a stereolithography method, in which a liquid photocurable resin is cured and laminated layer by layer with an ultraviolet laser, a fused deposition modeling method, in which resin melted mainly by heat is extruded from a nozzle and stacked, an inkjet method, in which resin sprayed from an inkjet head is solidified and laminated with ultraviolet light, or a powder fixing method, in which a photocurable resin is sprayed from an inkjet head as a binder and the powder is solidified layer by layer, among others, and the like, and the method may be selected according to the material of the press head.

[0029] Here, the 3D model data refers to the 3D modeling data that is the basis for 3D modeling in the 3D printer 12, and includes coordinate information for the contours of each layer, which are the repeating units for solidifying the 3D object to be created, and height information for each coordinate in each layer.

[0030] The design data is image data (two-dimensional data) that serves as the basis for 3D model data for three-dimensional modeling, and includes information on the press surface that corresponds to the textured pattern to be applied to the surface of the solid cosmetic product. The design data may also be in the form of 3D model data.

[0031] The design data may be input directly to the information processing device 11, or may be input to a second information processing device 13, which is another information processing device connected to the first information processing device 11 via a network N, and then transmitted to the first information processing device 11.

[0032] For example, at a storefront or on an internet site, a designer or a customer can input desired design data (image data) into the second information processing device 13, and the design data can be transmitted from the second information processing device 13 to the first information processing device 11 via the network N. In this case, the first information processing device 11 converts the design data into 3D model data so as to realize the design.

[0033] In the press head manufacturing system of the present invention, 3D model data for the press head is created according to the acquired design data, and the press head is integrally molded in a 3D printer according to the 3D model data, allowing for molding in accordance with the design data and improving the flexibility of the press head. Therefore, the press surface of the press head can be freely customized, for example, by forming the convex or concave areas on the surface of the press head into a star shape, a heart shape, or a face shape, thereby enabling flexible customization of the design of the surface of the solid cosmetic product pressed using the press head.

[0034] <Method of Manufacturing Press Head> Next, the manufacturing flow of the press head of the present invention will be described with reference to Figures 3 to 5. Figure 3 is a flowchart showing a method of manufacturing a press head according to one embodiment of the present invention. Figures 4 and 5 are explanatory views of the molding process of the press head 44 of the present invention in a 3D printer.

[0035] In step S1 of the flow in Figure 3, the first information processing device 11 acquires design data including at least shape information of the press surface by directly inputting it or by receiving it from the second information processing device 13. The design data is data (model data) that forms the basis of the three-dimensional data, and may be, for example, a two-dimensional drawing (six-sided drawing), a photograph, or an actual object to be 3D modeled. Alternatively, the design data may be three-dimensional data (3D model data) that does not require conversion for a 3D printer, such as scan data created by scanning an actual object.

[0036] In step S2, the first information processing device 11 creates 3D model data of the press head based on the acquired design data. Here, the 3D model data is 3D CAD data, and the file format of the 3D CAD data is, for example, STL (Standard Triangulated Language) format, IGES file, STEP file, Parasolid file, etc. If the design data acquired in step S1 is 3D data in the above format, step S2 of converting data from 2D to 3D is unnecessary, and the acquired design data is used as 3D model data without processing.

[0037] In step S3, the first information processing device 11 outputs the 3D model data to the 3D printer 12.

[0038] Then, in step S4, the 3D model data is sliced ​​into slices at predetermined thicknesses (intervals) by the 3D printer 12 to generate two-dimensional slice data for each layer. The thickness of the slice data is, for example, 0.03 mm to 0.05 mm.

[0039] Then, in step S5, the 3D printer 12 integrally molds a press surface having a decorative uneven pattern on the surface and a press head including through holes from raw material (e.g., metal material) in accordance with the slice data.

[0040] In this process, starting from the bottom, the molten metal material is layered one by one in two dimensions according to the slice data for each specified thickness, as shown by the arrows in Figure 4. As a result, the through-holes that penetrate the press head from top to bottom and the decorative uneven pattern on the press surface that becomes the underside when in use can be formed integrally in the series of steps for forming each layer.

[0041] In the present invention, the 3D printer 12 is preferably, for example, a laser sintering method (powder lamination method), in which a laser is irradiated onto metal powder, melting and solidifying the metal at the points of impact. In a metal 3D printer using the laser sintering method, a laser beam is irradiated onto metal powder spread on a modeling stage to build up one layer. After irradiating one layer, more powder is spread out, and the remaining powder is collected outside the stage. Then, by irradiating the next layer with the laser, only the irradiated areas solidify, forming a model. Once the press head is completely built up in this way, the unsintered metal powder is collected and the model is removed.

[0042] The 3D printer 12 is not limited to the laser sintering method described above. For example, when forming a press head using resin, a photolithography method, a fused deposition modeling method, an inkjet method, a powder fixing method, etc. may be used.

[0043] This integrated molding reduces the number of parts in the manufactured press head and reduces the assembly man-hours during manufacturing. In addition, because 3D printers do not use molds, the press heads manufactured using this manufacturing method are largely free from the restrictions on the shape and size of the through holes and the uneven patterns on the press surface that arise when manufacturing using molds, significantly improving the degree of freedom in shape.

[0044] Fig. 5 is an explanatory diagram of another example of the process of forming a press head of the present invention in a 3D printer. Fig. 4 shows an example of forming one press head in the 3D printer 12, but in the present invention, if the dimensions of the press head allow, multiple press heads may be formed simultaneously in one 3D printer 12, as shown in Fig. 5.

[0045] 6 is a diagram showing an example of the press surface of a press head according to one embodiment of the present invention. In the press head manufactured by the manufacturing method of the present invention, as shown in FIG. 6, the press surface 44a can be divided into multiple regions, and different patterns can be formed in each region, thereby forming a fine and complex uneven pattern.

[0046] Furthermore, when metal 3D printers are used to build structures by layering, they can create structures with a height of up to about eight times the base without distortion. Therefore, because the press head is built by layering, it is possible to create fine patterns, and because it is built by layering, it is possible to create thin, tall (with deep recesses and projections) patterns. For example, the press head can create vertically elongated protrusions (cylindrical or prismatic protrusions) or plate-like objects (plate-like protrusions) as long as the height is within eight times the horizontal length. Therefore, deep holes or deep grooves can be formed on the surface of a solid cosmetic product pressed by such a press head. For example, when forming deep grooves, the solid cosmetic product may contain cosmetics with different colors or textures across the grooves.

[0047] Furthermore, by using a 3D printer to integrally mold the press head, it is easier to create through holes than with press heads created by cutting using a mold.

[0048] In the present invention, when manufacturing a press head, a press head can be formed in units of at least one without molding a mold, and a solid cosmetic product can be manufactured using that press head, making it suitable for small-lot production, such as limited edition products or customized products with names, etc. Even in this case, since a mold for a small-lot press head is not required, increases in manufacturing costs can be suppressed, and an increase in the price of each solid cosmetic product can be suppressed.

[0049] Furthermore, when solid cosmetic sample materials with various surface patterns are required, such as for pre-release prototyping of a new product, the present invention makes it possible to form the desired three-dimensional press head simply by inputting design data, without creating a mold. This allows for flexible response to the creation of solid cosmetic sample materials with various surface shapes that require various designs.

[0050] Furthermore, even when manufacturing multiple press heads of the same shape, they are manufactured using the same conditions in a 3D printer according to a single input design data. Therefore, similar to molding using a mold, multiple press heads can be repeatedly molded in the same shape regardless of the number of press heads to be molded.

[0051] <Configuration of Press Head (Part 2)> FIG. 7 is a schematic cross-sectional view of a press head according to another embodiment of the present invention.

[0052] The press head 45 in this embodiment differs from the press head in FIG. 1 in that no through holes are formed therein, but the other shapes are the same.

[0053] The press head 45 without through holes shown in FIG. 7 can be used in the preliminary pressing step in the production flow of a solid cosmetic product, which will be described later.

[0054] The press head 45 shown in FIG. 7 is also formed by a 3D printer using the press head manufacturing system 1 shown in FIG. 2 and in accordance with the manufacturing flow shown in FIG. 3, in accordance with 3D model data based on design data.

[0055] <Manufacturing Method of Solid Cosmetic> Next, a manufacturing method of a solid cosmetic to which the press head of the present invention is applied will be described with reference to Figures 8 to 12. Figure 8 is a flowchart showing a manufacturing method of a solid cosmetic according to an embodiment of the present invention.

[0056] Here, a solid cosmetic refers to a cosmetic composition (mixture) containing a powder component, an oily component, and, as necessary, optional components, etc., formed into a solid form. Examples of solid cosmetic products include makeup cosmetics such as foundation, face powder, eye shadow, eye color, eyeliner, blush color, eyebrow powder, face powder, blush, and lipstick, as well as basic cosmetics such as body powder, whitening powder, deodorant powder, and fragrance powder. In this embodiment, an example will be described in which the powder cosmetic is eye shadow.

[0057] In this specification, the cosmetic composition refers to a composition containing powder components, oily components, optional components, etc., and its form is not limited. The cosmetic composition includes a mixed cosmetic powder obtained by mixing powder components, oily components, optional components, etc. in a powder state, a slurry obtained by mixing and dispersing the mixed cosmetic powder in a volatile dispersion medium, and a semi-dried product (molded body) obtained by drying and molding at least a portion of the volatile dispersion medium contained in the slurry.

[0058] The method for producing a solid cosmetic product according to this embodiment can be a wet method in which an appropriate amount of the cosmetic composition is added to a solvent and mixed, and the solvent is removed from a slurry, capillary, or the like, or a dry method in which the cosmetic composition is filled into a container and compressed. When using a wet method, the cosmetic composition can be made into a slurry, capillary, or other state depending on the amount of solvent to which it is added. In this embodiment, a case in which a wet method is used will be described.

[0059] As shown in the production flow in FIG. 8 , the method for producing a solid cosmetic product according to this embodiment is a method for producing a solid cosmetic product whose surface is decorated with an uneven shape, and includes a slurry preparation step (step S11), a filling step (step S12), a pressing step (step S13), a demolding step (step S14), and a drying step (step S15).

[0060] The slurry preparation step S11 is a step of obtaining a slurry containing powder components, and includes a mixing step (S111) and a kneading step (S112) as shown in Fig. 8 .

[0061] In the mixing step S111, multiple types of powder components, an oil component, and optional components, if necessary, are charged into a mixer and mixed to obtain a cosmetic mixture powder. If the oil component contains an oil that becomes solid or pasty at room temperature (25°C ± 2°C), it is preferable to heat and dissolve the oil component and then dry-mix it with the powder component. The inclusion of a thickener as an optional component, for example, strengthens the adhesion between the powder components and allows the cosmetic mixture powder to be adjusted to an appropriate hardness (viscosity) for molding.

[0062] As the mixer, a known mixer such as a Henschel mixer (registered trademark) or a pulperizer can be used.

[0063] The mixing ratio of the powder component to the oil component is appropriately selected depending on the types of powder component and oil component used, and for example, the ratio of the powder component to the oil component is preferably 60:40 to 99.5:0.5 by mass.

[0064] In the kneading step of step S112, the cosmetic mixed powder produced in the mixing step (step S111) and a volatile dispersion medium are charged into a kneading machine (not shown), and the cosmetic mixed powder is dispersed in the volatile dispersion medium to produce slurry 2. The obtained slurry 2 is transferred to a storage tank or the like and stored.

[0065] The volatile dispersion medium may be a volatile organic solvent, water, or the like. Examples of volatile organic solvents include low-boiling alcohols such as ethyl alcohol, acetone, isopropyl alcohol, and n-butanol; low-boiling hydrocarbon oils such as xylene, toluene, benzene, heptane, pentane, hexane, cyclohexane, isooctane, nonane, decane, p-menthane, pinene, isododecane, isohexadecane, isoparaffin, and limonene; low-boiling linear or cyclic silicone oils such as dimethylpolysiloxane, methyltrimethicone, hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, and decamethylcyclopentasiloxane; and low-boiling fluorine compounds such as perfluoropolyethers. These solvents may be used alone or in combination of two or more.

[0066] The content of the volatile dispersion medium can be appropriately selected depending on the polarity, specific gravity, etc. of the volatile dispersion medium used, as long as sufficient fluidity of the slurry 2 can be ensured when the slurry 2 is filled into the inner tray 30 in the filling step (step S12) described below. The content of the volatile dispersion medium is preferably, for example, about half to twice the amount of the cosmetic mixture powder in mass ratio.

[0067] The kneading machine used in S112 may be a known kneading machine such as a kneader, a twin-screw kneader, a disper mixer, a homogenizer, a planetary mixer, Combimix (registered trademark), or an Ajihomomixer.

[0068] Then, in the next filling step S12, the slurry 2 produced in the kneading step (step S112) is filled into an inner tray 30 made of metal or resin.

[0069] In the pressing process of step S13, the slurry 2 filled in the inner plate 30 is pressed and molded using a press device to obtain a molded body 3 (see Figure 10), which is a semi-dried product with an uneven decoration on the surface.

[0070] Fig. 9 is a schematic cross-sectional view showing an example of a press device used in the press step of S13. As shown in Fig. 9, the press device 40 has an upper press device 41 and a lower press device 42. During pressing, the upper press device 41 is disposed above the lower press device 42.

[0071] The upper press device 41 has a main body 43 and a press head 44. The press head 44 may be either the press head 44 or the press head 45 manufactured by the manufacturing method of the present invention. The press head 44 is configured to be movable in the up and down directions (Z1 and Z2 directions) relative to the main body 43.

[0072] 9, the lower press device 42 has an attachment recess 421 formed in a position facing the press surface 44a when the upper press device 41 is attached. The inner tray 30, which is filled with the slurry 2, is attached to the attachment recess 421. Therefore, the press head 44 is configured to be movable in the vertical direction (Z1 and Z2 directions) relative to the attachment recess 421. Alternatively, the press head 44 may be fixed and the attachment recess 421 may be configured to be movable in the vertical direction.

[0073] In the pressing process of step S13, the press head 44 is moved downward to transition from the state shown in Figure 9 to the state shown in Figure 10, and the slurry 2 filled in the inner plate 30 is pressed and molded to obtain a molded body 3, which is a semi-dried material with an unevenly decorated surface.

[0074] In the demolding process of step S14, a demolding process is performed in which the press head 44 is separated from the molded body 3. To transition from the state of Fig. 10 to the state of Fig. 11, the press head 44 is moved upward and the upper press device 41 is separated from the lower press device 42, separating the press surface 44a from the molded body 3, thereby forming a molded body 3 whose surface has been decorated.

[0075] When the press head 44 is released from the compact 3, compressed air may be introduced into the through holes 44b formed in the press head 44. The introduction of compressed air into the through holes 44b can be performed using, for example, a compressed air generating device such as a compressor. The compressed air introduced into the through holes 44b can act as a force that separates the press surface 44a and the compact 3 at the interface between the press surface 44a and the compact 3. Therefore, the press surface 44a of the press head 44 can be reliably released from the compact 3 without interposing a release sheet (also called wrapping paper) between the press surface 44a and the compact 3.

[0076] Furthermore, the pressure of the compressed air may be set within a range that does not destroy the decorative pattern formed on the surface of the molded body 3. Even if compressed air is sprayed onto the surface of the decorated molded body 3 during demolding, the molded body 3 has a predetermined viscosity, allowing the molded body 3 to maintain a certain degree of shape. Therefore, even if the press head 44 is separated from the molded body 3 using compressed air, the decorated surface of the molded body 3 will not be destroyed by the compressed air.

[0077] In the drying step of step S15, the molded body 3 is dried at a predetermined temperature for a predetermined drying time, thereby obtaining the solid cosmetic material 4, which is held in the inner tray 30 and has a textured decorative surface.

[0078] The solid cosmetic material 4 having a textured decorative surface may be separated from the inner tray 30 as shown in FIG. 12, or may remain held in the inner tray 30 without being separated.

[0079] The drying temperature and drying time can be appropriately selected depending on the contents of the powder component, oil component, and optional components constituting the molded body 3, the shape and size of the molded body 3, etc. The drying temperature for the molded body 3 is preferably 20°C to 80°C, for example. The drying time varies depending on the type of aqueous solvent and the drying temperature, but is preferably 5 hours to 30 hours, for example. Furthermore, before drying, blotting paper may be placed on the surface and pressure may be applied to remove some of the solvent.

[0080] As described above, the method for producing a solid cosmetic product according to this embodiment includes a pressing step (step S13) and a demolding step (step S14). In the pressing step (step S13), a press head 44 is used to apply a decorative texture to the surface of the molded product 3, which has been semi-dried from the slurry 2. In the demolding step (step S14), the pressing surface 44a of the press head 44 is separated from the molded product 3, thereby obtaining a decorated solid cosmetic product 4.

[0081] In the method for producing a solid cosmetic product according to this embodiment, the pressing step (step S13) can include a preliminary pressing step (step S131) ​​and a main pressing step (step S132). After the slurry 2 is semi-dried in the preliminary pressing step (step S131) ​​using the press head 45 of Figure 7, the semi-dried slurry 2 is then main-pressed in the main pressing step (step S132) using the press head 44 of Figure 1, thereby reducing adhesion of the slurry 2 to the pressing surface 44a of the press head 44.

[0082] The method for producing a solid cosmetic product according to this embodiment can use a press head 44 in which the spacing between adjacent through-holes 44b on the press surface 44a is 200 μm to 250 μm. This allows compressed air supplied through the through-holes 44b to separate the contact surface between the press surface 44a and the molded body 3 in a substantially uniform manner. Furthermore, the air present between the press surface 44a and the molded body 3 and the volatile dispersion medium contained in the slurry 2 can be sucked through the through-holes 44b in a substantially uniform manner onto the contact surface between the press surface 44a and the slurry 2.

[0083] The method for producing a solid cosmetic product according to this embodiment has the above-mentioned properties, and therefore can be effectively used not only for solid cosmetic products but also for solid powder products whose surfaces are to be decorated.

[0084] In this embodiment, the cosmetic composition does not have to be used in a slurry form, but may be used, for example, in a clay-like form that roughly corresponds to the state of the molded body 3 obtained by semi-drying the slurry 2 described above.

[0085] In this embodiment, the method is not limited to a wet method, and a dry method in which the cosmetic composition is filled into a container and compressed may also be used.

[0086] Although the method for molding a solid cosmetic product described above involves bringing the press head into direct contact with the cosmetic composition, molding may also be performed by sandwiching paper or film between the slurry and the press head. In this case, it is preferable that the through-holes in the press head have a larger pore size, such as 600 μm to 1000 μm, within the above-mentioned range of 10 μm to 1000 μm.

[0087] Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various modifications and changes are possible within the scope of the gist of the embodiments of the present invention described in the claims.

[0088] This international application claims priority based on Japanese Patent Application No. 2021-177821, filed on October 29, 2021, and the entire contents of No. 2021-177821 are incorporated by reference into this international application.

[0089] REFERENCE SIGNS LIST 1 Press head manufacturing system (press head manufacturing system) 2 Slurry 3 Molded body 4 Solid cosmetic 11 First information processing device (information processing device) 12 3D printer 13 Second information processing device 44, 45 Press head 44a 45a Press surface 44b Through hole (ventilation hole) 44c, 45c Back surface

Claims

1. A method for manufacturing a press head that presses a solid cosmetic during the manufacturing process, comprising a step of designing three-dimensional model data including information on a press surface corresponding to an uneven pattern applied to the surface of the solid cosmetic; and an integral molding step of creating slice data by slicing the three-dimensional model data and solidifying a metal material in a powder or fluid state according to the slice data to integrally mold a press head having a press surface corresponding to the uneven pattern. A method for manufacturing a press head.

2. In the integral molding step, the metal material is melted and solidified layer by layer for molding The method for manufacturing a press head according to claim 1.

3. In the integral molding step, the press head to be molded has a plurality of ventilation holes penetrating in a direction perpendicular to the press surface The method for manufacturing a press head according to claim 1.

4. In the integral molding step, the press head has a plate-like protrusion having a height within 8 times the length of one side or the diameter of the bottom surface of the protrusion, or a prismatic or cylindrical protrusion on the molding surface of the uneven pattern. The method for manufacturing a press head according to claim 1.

5. The metal material is stainless steel or titanium The method for manufacturing a press head according to claim 1.

6. Simultaneously molding a plurality of press heads The method for manufacturing a press head according to claim 1.

7. A manufacturing system for a press head that presses a solid cosmetic during the manufacturing process, an information processing apparatus that creates three-dimensional model data including information on a press surface corresponding to an uneven pattern applied to the surface of the solid cosmetic; A 3D printer that creates slice data by slicing 3D model data and solidifies a metal material in a powder or fluid state according to the slice data to integrally form a press head having a press surface corresponding to the uneven pattern, and the like. A manufacturing system for a press head.

8. It includes a second information processing device connected to the information processing device via a network. The second information processing device receives the 3D model data or the 2D data that is the source of the 3D model data, and transmits the 3D model data or the 2D data that is the source of the 3D model data to the information processing device. The manufacturing system for a press head according to claim 7.

9. A press head that presses a solid cosmetic during the manufacturing process, having a press surface with an uneven shape so as to apply an uneven decoration to the surface of the solid cosmetic, The press head is formed by melting and solidifying a metal material layer by layer by a 3D printer. Press head.