JP7638082B2 - Manufacturing method of oily solid and oily solid - Google Patents

Description

The present invention relates to a method for producing an oily solid and to an oily solid.

Conventionally, oily solids with a multi-layer structure and methods for producing the same have been known. For example, Patent Document 1 discloses a stick-shaped oily solid cosmetic having an outer layer and an inner layer. In Patent Document 1, an inner layer mold such as a core for forming the inner layer is placed in an outer layer mold for forming the outer layer, an oily solid composition for the outer layer is filled in a molten state into the outer layer mold, the inner layer mold is removed after the filled oily solid composition has solidified, and the oily solid composition for the inner layer is filled in a molten state into the space formed by removing the inner layer mold to form the inner layer.

JP 2017-95452 A

In the technology described in Patent Document 1, the mold for the inner layer is placed on the mold for the outer layer, which may complicate the manufacturing process. In addition, since the mold for the inner layer is removed from the mold for the outer layer, the external shape of the mold for the inner layer is limited to a shape that can be removed from the mold for the outer layer, which limits the freedom of the shape of the inner layer.

The objective of the present invention is to provide a method for producing an oily solid product and an oily solid product that can solve the problems of the conventional technology described above.

The present invention achieves the above-mentioned object by providing a method for producing an oily solid comprising a first oily solid and a second oily solid, the method comprising a preparation step of preparing a first oily solid of a desired shape, a filling step of filling at least a portion of a mold or container with a molten second oily solid, and an installation step of installing the first oily solid in the mold before, after, or simultaneously with the filling step.

The present invention achieves the above object by providing an oily solid comprising a first oily solid having an axis and a second oily solid covering at least a portion of the first oily solid in a direction around the axis, the first oily solid being exposed on the outer surface of the second oily solid on one side in the axial direction, and a part or all of the outer surface of the first oily solid covered by the second oily solid having a first surface facing one side in the axial direction.

The present invention achieves the above object by providing an oily solid comprising a first oily solid having an axis and a second oily solid covering at least a portion of the first oily solid in a direction around the axis, the first oily solid being exposed on the outer surface of the second oily solid on one side in the axial direction, the portion of the first oily solid covered by the second oily solid having an undercut portion, the undercut portion having a first portion and a second portion adjacent to the first portion on the other side in the axial direction, the maximum distance in the axis-perpendicular direction from the axis of the first oily solid to the surface of the first portion being smaller than the maximum distance in the axis-perpendicular direction from the axis of the first oily solid to the surface of the second portion.

The present invention achieves the above object by providing an oily solid comprising a first oily solid having an axially extending shaft portion and a second oily solid covering at least a portion of the first oily solid in the axial direction, the first oily solid being exposed on the outer surface of the second oily solid on one side in the axial direction, the first oily solid covered by the second oily solid having a first portion and a second portion adjacent to the first portion on the other side in the axial direction, the surface of the second oily solid covering the first oily solid being cylindrical extending in the axial direction, and the minimum distance from the surface of the second oily solid to the first portion being greater than the minimum distance from the surface of the second oily solid to the second portion.

According to the method for producing an oily solid of the present invention, an oily solid containing a first oily solid and a second oily solid can be produced without using an auxiliary mold such as a core, and therefore a production method capable of simplifying the production process can be provided.
According to the oily solid of the present invention, it is possible to form a shape of the first oily solid that will become an inner layer portion, which is difficult to achieve using an auxiliary mold such as a core, and it is possible to provide an oily solid with an increased degree of freedom in the shape of the first oily solid.

FIG. 1 is a perspective view showing a stick-shaped cosmetic material, which is an example of an oily solid material produced by the method for producing an oily solid material of the present invention, and a cosmetic product including the stick-shaped cosmetic material. 2(a) to (e) are schematic cross-sectional views for explaining the manufacturing method according to the first embodiment of the present invention. FIG. 3(a) is an enlarged sectional view illustrating the configuration of a first oily solid material in a stick-shaped cosmetic produced by the production method of the first embodiment, FIG. 3(b) is an enlarged sectional view illustrating the relationship between the first oily solid material and a second oily solid material in the stick-shaped cosmetic, and FIG. 3(c) is a schematic sectional perspective view of the first oily solid material. 4(a) to (d) are schematic cross-sectional views for explaining the manufacturing method according to the second embodiment of the present invention. 5(a) to (d) are schematic cross-sectional views for explaining the manufacturing method according to the third embodiment of the present invention, and correspond to FIGS. 2(b) to (e). 6(a) to (d) are schematic cross-sectional views for explaining the manufacturing method according to the fourth embodiment of the present invention, and correspond to FIGS. 2(b) to (e). 7(a) to (d) are schematic cross-sectional views for explaining the manufacturing method according to the fifth embodiment of the present invention, and correspond to FIGS. 2(b) to (e). FIG. 8 is a diagram illustrating the step of adhering powder to a first oily solid material in the manufacturing method according to the fifth embodiment of the present invention. FIG. 9 is an exploded perspective view of the cosmetic product shown in FIG. 10(a) and (b) are schematic cross-sectional views for explaining a modified example of the method for producing an oily solid material of the present invention, and correspond to FIGS. 2(c) and (d). FIG. 11 is a schematic cross-sectional view showing the cosmetic product shown in FIG. 10(b) in a state in which the axis of the cosmetic container is inclined relative to the vertical direction. 12(a) and (b) are schematic cross-sectional views for explaining still another modified example of the method for producing an oily solid material of the present invention, and correspond to FIG. 2(d).

The present invention will now be described based on its preferred embodiments.
Fig. 1 shows a stick-shaped cosmetic 2, which is an example of an oily solid produced by the oily solid production method of the present invention. The oily solid produced by the present invention is preferably attached to a cosmetic container 3 and used as a part of a cosmetic product 1, like the stick-shaped cosmetic 2 shown in Fig. 1. The cosmetic container 3 preferably includes a lifting mechanism 20 for lifting and lowering the stick-shaped cosmetic 2, and Fig. 1 shows a state in which the stick-shaped cosmetic 2 has been lifted by the lifting mechanism 20. Fig. 9 shows an example of the lifting mechanism 20.
Examples of the stick-shaped cosmetic material 2 include oil-based solid cosmetic materials, particularly makeup cosmetic materials, having a stick shape, such as lipstick, lip balm, lip gloss, stick eyeshadow, eyebrow, eyeliner, stick foundation, concealer, and whitening stick.

As shown in Figures 1 and 9, the stick-shaped cosmetic 2 produced by the method for producing an oily solid material of the present invention includes a first oily solid material 51 having an axis and a second oily solid material 52. The first oily solid material 51 has an axis portion 51c extending in the axial direction Z. The first oily solid material 51 has the other end 51b on one side in the axial direction Z, and has one end 51a on the other side in the axial direction Z. The one end 51a is a free end (the tip of the oily solid material) on the side where the stick-shaped cosmetic material 2 is used. The other end 51b is an attachment end (the base end of the oily solid material) on the side where it is attached to the lifting mechanism 20. The first oily solid material 51 constitutes an inner layer portion, and the second oily solid material 52 constitutes an outer layer portion.
One end 51a and the shaft portion 51c of the first oily solid material 51 are covered by the second oily solid material 52. The one end 51a of the first oily solid material 51 is the end, of both ends in the axial direction Z of the first oily solid material 51, that was located closer to the bottom 6c of a bottomed mold 6 (see FIG. 2(c)) during the production of the stick-shaped cosmetic material 2. The mold 6 is a mold for the outer layer portion.

The axial direction Z of the first oily solid 51 is the longitudinal direction when the first oily solid 51 is rod-shaped, and is the height direction when the first oily solid 51 is block-shaped. The other end 51b located on one side of the axial direction Z of the first oily solid 51 may or may not be covered by the second oily solid 52. In the stick-shaped cosmetic 2 shown in Figures 1 and 9, the other end 51b of the first oily solid 51 in the axial direction Z is not covered by the second oily solid 52 and is exposed to the surface of the stick-shaped cosmetic 2 (the outer surface of the second oily solid 52). The second oily solid 52 covers at least a portion of the first oily solid 51 all around the axis. Of course, the second oily solid 52 covers at least a portion of the first oily solid 51 in the axis direction.

The materials constituting the first oily solid material 51 and the second oily solid material 52 will be described.
As the constituent materials of the first oily solid 51 and the second oily solid 52, various materials that have been conventionally used can be used without particular limitation depending on the purpose of the oily solid. The first oily solid 51 and the second oily solid 52 are preferably oily solid compositions having different properties. Here, the oily solid compositions having different properties refer to oily solid compositions having at least one or more different properties and effects such as color tone, taste, fragrance, hardness, volatility, UV protection effect, moisturizing effect, and sustained effect of the applied film, and among these, oily solid compositions having different color tone and hardness are preferable.

The first oily solid 51 and the second oily solid 52 may have the same or different color tones. From the viewpoint of improving the design of the stick-shaped cosmetic material 2, it is preferable that the color tones are different. Different color tones means that one or more of the hue, brightness, saturation, and transparency are different. Methods for making the color tones different include blending different types of pigments, dyes, and oils into the first oily solid 51 and the second oily solid 52, or blending a pigment or dye into only one of the first oily solid 51 and the second oily solid 52, but are not limited to these and various methods can be used.

Examples of embodiments in which the first oily solid 51 and the second oily solid 52 have different properties or effects other than color tone include (1) an embodiment in which the fragrance of the first oily solid 51 is different from the fragrance of the second oily solid 52, (2) an embodiment in which the hardness of the first oily solid 51 is made harder than the hardness of the second oily solid 52, and (3) an embodiment in which the solvent of the first oily solid 51 is made more volatile than the solvent of the second oily solid 52.
According to the above aspect (1), for example, an effect is obtained in that the change in scent can be enjoyed with use. According to the above aspect (2), for example, even if the second oily solid 52 is too soft to be molded by itself, it can be molded by using the harder first oily solid as a core material. According to the above aspect (3), for example, an effect is obtained in that the evaporation of the highly volatile solvent of the first oily solid can be suppressed until use.

As an example of the oily composition constituting the first oily solid material 51 and the second oily solid material 52, a powder such as a pigment is preferably dispersed in a cosmetic material having an oily continuous layer, and the composition is solid or pasty at 25°C and preferably liquid at 50°C to 150°C.
In addition, the first and second oily solids 51, 52 preferably contain 10 mass% or more and 100 mass% or less of oil agent based on the total amount of the first and second oily solids 51, 52, and more preferably 25 mass% or more and 96 mass% or less of oil agent.

Oils include mineral waxes such as ozokerite and ceresin; petroleum waxes such as paraffin and microcrystalline wax; synthetic hydrocarbons such as Fischer-Tropsch wax and polyethylene wax; vegetable waxes such as carnauba wax, candelilla wax, rice wax, sunflower wax, hydrogenated jojoba oil, and Japan wax; animal waxes such as beeswax and whale wax; synthetic waxes such as silicone wax, synthetic beeswax, and synthetic Japan wax; dextrin palmitate, sucrose fatty acid esters, and sugar Oil-based gelling agents such as inulin stearic acid, 12-hydroxystearic acid, dibutyl lauroyl glutamide, dibutyl ethylhexanoyl glutamide, and polyamide resins; petrolatum, vinyl leather wax, dipentaerythrityl hexa(behenic acid/benzoic acid/ethylhexanoic acid), cholesteryl hydroxystearate, dipentaerythrityl tetra(hydroxystearate/isostearate), hydrogenated palm oil, dipentaerythrityl hexahydroxystearate, tri(caprylic acid/capric acid/myristic acid/ Glyceryl stearate, Dipentaerythrityl hexa(hydroxystearic acid/hexastearic acid/hexarosin acid), Phytosteryl oleate, Glyceryl ethylhexanoate/hexastearic acid/hexaadipate, Dioctyldodecyl lauroyl glutamate/phytosteryl/behenyl, Phytosteryl/isostearyl/cetyl/stearyl/behenyl dimer dilinoleate, Dimer dilinoleyl bis(behenyl/isostearyl/phytosteryl) dimer dilinoleate, Hard lanolin, Reduced lanolin, Paste oils such as bisdiglyceryl polyacyladipate-2; linear or branched hydrocarbon oils such as liquid paraffin, light liquid isoparaffin, heavy liquid isoparaffin, mineral oil, squalane, α-olefin oligomer, polyisobutylene, polybutene, hydrogenated polyisobutene, and hydrogenated polydecene; isononyl isononanoate, isodecyl isononanoate, isotridecyl isononanoate, tricyclodecane methyl isononanoate, ethyl isostearate, isobutyl isostearate, isopropyl isostearate, iso 2-Hexyldecyl stearate, di-2-hexylhexyl succinate, bis-ethoxydiglycol succinate, hexyl laurate, di(caprylic/capric)propanediol, neopentyl glycol diisononanoate, neopentyl glycol dicaprate, glyceryl diisostearate, polyglyceryl diisostearate, propanediol diisostearate, trimethylolpropane triisostearate, glyceryl triisostearate, diglyceryl triisostearate, tetraisostearate diglyceryl phosphate, diisostearyl malate, octyldodecyl malate, glycerin fatty acid esters, jojoba oil, di(phytosteryl/octyldodecyl) lauroyl glutamate, octyldodecyl myristate, isopropyl myristate, 2-ethylhexyl palmitate, isopropyl palmitate, cetyl 2-ethylhexanoate, trimethylolpropane tri-2-hexylhexanoate, glyceryl tri-2-ethylhexanoate, octyldodecyl myristate, 2-hexyldecyl myristate, 2-ethyl Examples of the oils include ester oils such as 2-hexyldecyl hexanoate, neopentyl glycol di-2-ethylhexanoate, ethylhexyl hydroxystearate, tri(caprylic acid/capric acid), glyceryl trioctanoate, neopentyl glycol dioctanoate, tritridecyl trimellitate, dipentaerythrityl tetraisostearate, pentaerythritol tetraisostearate, octyl methoxycinnamate, 2-ethylhexyl paramethoxycinnamate, diisopropyl dimerate, and propylene carbonate; higher alcohols such as lauryl alcohol, oleyl alcohol, isostearyl alcohol, behenyl alcohol, and octyldodecanol; silicone oils such as dimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenylpolysiloxane, trimethylpentaphenyltrisiloxane, methylhydrogenpolysiloxane, and higher alcohol-modified organopolysiloxane; fluoro oils such as fluoropolyether, perfluoroalkyl ether silicone, and fluorine-modified silicone; and phenoxyethanol. The various oils mentioned above can be used alone or in combination of two or more.

As the powder, various types of powders conventionally used in cosmetics can be used without any particular limitation, and may be inorganic or organic powders, or a combination of inorganic and organic powders. The powder may be either plate-like or granular.
Examples of the powder contained in the first oily solid material 51 and the second oily solid material 52 include coloring pigments for imparting color, luster pigments, extender pigments, and other pigments, oil-soluble dyes, and the like, which may be blended alone or in combination of two or more. It is of course possible for the powder composition of the first oily solid material 51 and the second oily solid material 52 to be different.
The first and second oily solids 51, 52 preferably contain 0.001% by mass or more and 90% by mass or less of powder based on the total amount of the first and second oily solids 51, 52, respectively, and more preferably contain 0.2% by mass or more and 45% by mass or less of powder.

(First embodiment)
A first preferred embodiment of the method for producing an oily solid material of the present invention will be described below with reference to Fig. 2. In the production method shown in Fig. 2, a stick-shaped cosmetic material 2 having a first oily solid material 51 and a second oily solid material 52, similar to the stick-shaped cosmetic material 2 shown in Fig. 1, is produced in an inverted state with the top and bottom reversed. Fig. 2 shows a simplified view of the stick-shaped cosmetic material 2 and the various members for producing it. The axial direction Z of the first oily solid material 51 is the same as the axial direction Z of the stick-shaped cosmetic material 2, and is represented by the same reference symbol. The reference symbol Y indicates the axis of the stick-shaped cosmetic material 2. The axis Y is also the axis of the first oily solid material 51 (hereinafter also referred to as the "axis line"), i.e., the center line of the axis portion 51c. The axis of the first oily solid material 51 and the axis of the stick-shaped cosmetic material 2 may be different from each other. More specifically, the axial direction of the first oily solid material 51 may be different from that of the stick-type cosmetic material 2, or the axial direction of the first oily solid material 51 may be the same as that of the stick-type cosmetic material 2 but the position of the axis of the first oily solid material 51 may be different from that of the stick-type cosmetic material 2 in the direction perpendicular to the axial direction. The stick-type cosmetic material 2 shown in Figure 1 can also be produced by the production method shown in Figure 2.

The method for producing an oily solid material according to the first embodiment is a method for producing a stick-shaped cosmetic material 2 which is an oily solid material containing a first oily solid material 51 and a second oily solid material 52, and includes (1) a preparation step, (2) a placement step, (3) a filling step, and (4) a mold removal step. In the first embodiment, the placement step is carried out before the filling step. The preparation step also includes a forming step of forming the first oily solid material 51 into a desired shape.
(1) Preparation Step The preparation step is a step of preparing the first oily solid material 51. The preparation step includes a forming step of forming the first oily solid material 51 into a desired shape using a mold 7 for the first oily solid material, which is different from the mold 6 used in the filling step, and is performed before the setting step. The mold 7 is a mold for the inner layer portion.
As shown in FIG. 2(a), the mold 7 is composed of two split molds 7a and 7b that can be combined and separated, and when combined, the mold 7 is formed into a bottomed tubular shape with a bottom 7c formed on one side in the axial direction Z and an opening 7d formed on the other side in the axial direction Z. In this embodiment, the mold 7 is arranged so that the bottom 7c is located at the bottom and the opening 7d is located at the top. The opening 7d is an insertion port for the first oily solid material 511 in a molten state. Inside the mold 7, a space 7e is formed in a desired shape. The shape of the space 7e in the mold 7 is formed in the same shape as the external shape of the first oily solid material 51 after solidification. A predetermined amount of the first oily solid material 511 in a molten state is injected into the space 7e from the opening 7d. The predetermined amount here refers to the amount of the injected first oily solid material 511 in a molten state filled until it is flush with the opening 7d. The shape of the first oily solid material 511 in the molten state in the first embodiment is a spiral shape.

In the preparation process performed in the first embodiment, the first oily solid 511 in a molten state is solidified in the forming process shown in FIG. 2(a), and as shown in FIG. 2(b) and FIG. 3, the first oily solid 51 having an undercut portion 70 with a first portion 54 and a second portion 55 is formed. FIG. 2(b) shows the first oily solid 51 after solidification and removal of the mold 7. The first portion 54 and the second portion 55 are adjacent to each other in the axial direction Z. In the undercut portion 70, the distance R1 from the axis Y to the outer surface 54a of the first portion 54 is different from the distance R2 from the axis Y to the outer surface 55a of the second portion 55. More specifically, the distance R1 is smaller than the distance R2. The distance R1 means the maximum distance from the axis Y of the first oily solid 51 to the outer surface 54a of the first portion 54 in the direction perpendicular to the axis Y (hereinafter referred to as the "axis perpendicular direction"). Distance R2 refers to the maximum distance from the axis Y of the first oily solid 51 to the outer surface 55a of the second portion 55 in the direction perpendicular to the axis.

In the first embodiment, as shown in FIG. 3(c), the first oily solid 51 has a shaft portion 51c extending in the axial direction Z and a helical portion 15 whose cross-sectional shape along the axial direction Z is approximately triangular. The shaft portion 51c and the helical portion 15 may be formed separately or integrally. The helical portion 15 has a helical inclination portion 16 and a ridge portion 17. The helical inclination portion 16 is an inclined surface that extends continuously in a helical shape around the shaft portion 51c while inclining with respect to the axis perpendicular direction. The ridge portion 17 is the ridge of the helical portion 15 and is sandwiched between the helical inclination portions 16 on both sides in the axial direction Z. In this embodiment, the first portion 54 of the undercut portion 70 is a portion having a surface that is a part of the helical inclination portion 16, and the outer surface 54a of the first portion 54 is that part of the helical inclination portion 16. The second portion 55 has a surface including the ridge portion 17 and the adjacent helical inclination portion 16, and the outer surface 55a of the second portion 55 includes the ridge portion 17 and the helical inclination portion 16 adjacent to the ridge portion 17. In this embodiment, the shaft portion 51c has disk portions 51e and 51g formed on one end 51a and the other end 51b, respectively.

The first oily solid 51 has a first surface 56 facing the other end 51b on one side of the axial direction Z, and a second surface 57 facing the one end 51a on the other side of the axial direction Z. The second surface 57 is formed to face the first surface 56 in the axial direction Z. That is, the first surface 56 forms a reverse tapered surface with respect to the insertion direction Z1, and the second surface 57 forms a forward tapered surface with respect to the insertion direction Z1. Here, the first surface 56 facing one side of the axial direction Z means, in other words, that the first surface 56 is visible when the first oily solid 51 is viewed from one side of the axial direction Z (the side exposed to the outer surface of the second oily solid 52), or that the normal vector of the first surface 56 has a component facing one side of the axial direction Z.

(2) Setting Step In the setting step, the first oily solid material 51 is set in a bottomed mold 6 shown in Fig. 2(c). In the setting step, the first oily solid material 51 is set in the mold 6 so that the second portion 55 is located closer to the tip of the stick-shaped cosmetic material 2 than the first portion 54. In this embodiment, the second portion 55 is located closer to the one end 51a than the first portion 54, and the tip of the stick-shaped cosmetic material 2 is on the bottom 6c side of the mold 6. Therefore, the first oily solid material 51 is set in the mold 6 so that the second portion 55 is located closer to the bottom 6c of the mold 6 than the first portion 54.
The mold 6 is composed of two split molds 6a and 6b that can be combined and separated, and when combined, forms a bottomed tubular shape with a bottom 6c formed on one side in the axial direction Z and an opening 6d formed on the other side in the axial direction Z. In this embodiment, the bottom 6c is located in the insertion direction Z1, which is the lower side of the first oily solid 51 in the figure, and the opening 6d is located on the upper side. The opening 6d is an insertion port for the first oily solid 51 and forms a filling port for the second oily solid 522 in a molten state. The second oily solid 522 in a molten state refers to the raw material composition of the second oily solid 52 in a molten state. The internal space of the mold 6 is formed in a cylindrical concave shape so that the appearance of the second oily solid 52 is a circumferential surface. For this reason, the inner surface 6e of the internal space of the mold 6 is formed in a circumferential surface.

In the installation step, as shown in FIG. 2(c), the first oily solid 51 is inserted into the bottomed mold 6 in the insertion direction Z1, and the first oily solid 51 is installed so that the first oily solid 51 is not in contact with the mold 6. The insertion direction Z1 is the direction from the opening 6d toward the bottom 6c of the mold 6. The insertion direction Z1 may be parallel to the axial direction Z, or may not be parallel to the axial direction Z. In this embodiment, when the first oily solid 51 is installed in the mold 6, the first oily solid 51 and the mold 6 are not in contact with one end 51a of the first oily solid 51, which is the end in the insertion direction into the mold 6, and the bottom 6c of the mold 6. Here, the "insertion direction end" means the tip in the insertion direction Z1. In addition, it is preferable that the part of the first oily solid 51 that is buried in the second oily solid 52 in the filling step described later is not in contact with the mold 6.

In this embodiment, the first oily solid 51 is placed in the mold 6 so that the outer surface of the first oily solid 51, preferably the ridge 55a which is the outer peripheral edge of the oily solid 51, is in a non-contact state with the inner surface 6e of the internal space of the mold 6. There are no particular limitations on the method of placing the first oily solid 51 in a non-contact state with the mold 6, and for example, the first oily solid 51 may be placed in the internal space of the mold 6 in a state where the other end 51b side, which is one side of the axial direction Z, is supported by a support by gripping, screwing, engaging, etc., thereby placing the first oily solid 51 in the internal space of the mold 6 so that the first oily solid 51 is in a non-contact state with the mold 6.

(3) Filling Step In the filling step, as shown in Fig. 2(d), the second oily solid material 522 in a molten state is filled into the mold 6 from the opening 6d. When the second oily solid material 522 in a molten state is filled into the mold 6, the second oily solid material 522 is filled between the first oily solid material 51 previously placed in the mold 6 and the inner surface 6e of the inner space of the mold 6. In the first embodiment, the second oily solid material 522 in a molten state is filled so as to be flush with the surface of the other end 51b side of the first oily solid material 51. After the filled second oily solid material 522 is solidified and a solidified body 200 in which one end 51a of the first oily solid material 51 is covered with the solidified second oily solid material 52 is formed, the mold removal step is performed.

(4) Mold Removal Step In the mold removal step, the mold 6 is removed from the solidified body 200 to obtain the stick-shaped cosmetic material 2, as shown in Fig. 2(e). After carrying out the above steps with the split molds 6a, 6b in a combined state, the two split molds 6a, 6b are separated, and the solidified body 200 can be easily removed. The solidified body 200 may be in a semi-solidified state, with the first oily solid material 51 or the second oily solid material 52 having an incompletely solidified portion inside or outside, and in that case, the stick-shaped cosmetic material 2 is completed when both the inside and the outside are completely solidified.

The materials for the molds 6 and 7 include metal, synthetic resin, ceramic, wood, elastomers such as natural rubber, synthetic rubber, and silicone rubber, and combinations of two or more of the same or different types of these. Among these, it is preferable to use elastomers such as metal, synthetic resin, synthetic rubber, and silicone rubber from the viewpoints of heat resistance, durability, releasability of oily solids, and processability. When the molds 6 and 7 made of elastomers are used, the molds 6 and 7 can be opened by applying negative pressure around the molds 6 and 7 in the mold removal process, and the molds 6 and 7 can be removed from the solidified body.

According to the manufacturing method of the first embodiment, the first oily solid material 51 formed into a desired shape is placed in the mold 6 to manufacture the stick-shaped cosmetic material 2, which eliminates the need for a core as an auxiliary mold that has been conventionally used, and also makes it easy to arrange and mold the first oily solid material 51, thereby simplifying the manufacturing process.
Since the first oily solid 51 formed in advance into a desired shape is placed inside the second oily solid 52, there is no longer any restriction on design that would be imposed by considering the mold-pulling direction, as occurs in the case of using a core, and this improves the degree of freedom in designing the shape of the first oily solid 51, the shape of the inner surface of the second oily solid 52, or the thickness of the second oily solid 52. In other words, the shape of the inner surface of the second oily solid 52 is the shape of the outer surface of the first oily solid 51.
Since the mold 6 is filled with the molten second oily solid material 522 and solidified after the first oily solid material 51 is placed in the mold 6, there is no need to control the temperature or hardness of the molten second oily solid material 522 in the mold 6 at the timing of placing the first oily solid material 51. Since the insertion port for the first oily solid material 51 and the filling port for the molten second oily solid material 52 can be shared, the mold 6 and the like can be simplified.

According to the manufacturing method of the first embodiment, in the installation step, the first oily solid material 51 is installed so that one end 51a, which is the end in the insertion direction of the first oily solid material 51, is in a non-contact state with the mold 6. Therefore, application of an external force in the insertion direction Z1 to the first oily solid material 51 is suppressed, and it is easy to install the first oily solid material 51 without crushing it.
In addition, since the first oily solid matter 51 is placed in the mold 6 in a non-contact state with the mold 6, the following effects are achieved.
When the outer surface of the first oily solid 51, preferably the ridge 55a which forms the outer peripheral edge of the first oily solid 51 or one end 51a which forms the insertion direction end, is placed within the mold 6 without contacting the mold 6, the first oily solid 51 is covered with the second oily solid 52.
Therefore, if the second oily solid 52 is opaque, at the beginning of use of the stick-shaped cosmetic 2, only the second oily solid 52 can be seen, and the presence of the first oily solid 51 inside cannot be recognized. When the stick-shaped cosmetic 2 is used in this state and the second oily solid 52 is consumed, the first oily solid 51 inside is gradually exposed. Thus, as the surface pattern of the stick-shaped cosmetic 2 is used, it is possible to provide a sense of surprise and interest to the user of the stick-shaped cosmetic 2 (hereinafter also referred to as "user") in terms of sight, smell, touch, and other senses, and also to improve usability. The term "opaque" as used herein refers to a property in which neither the shape nor the color of the first oily solid 51 can be identified through the second oily solid 52.

On the other hand, if the second oily solid 52 has transparency, the user can see the first oily solid 51 through the second oily solid 52, and therefore high design quality can be achieved by appropriately designing the shape and color of the first oily solid 51. This allows differentiation of products and improvement of their value. The second oily solid 52 having transparency means that the second oily solid 52 is transparent or translucent. Transparency refers to a property in which the shape and color of the first oily solid 51 can be clearly identified through the second oily solid 52. Translucency refers to a property in which the shape or color of the first oily solid 51 can be clearly identified through the second oily solid 52. An example of a property in which the shape is not clear but can be identified is a property in which the outline of the first oily solid 51 appears blurred.

In particular, when one end 51a of the first oily solid is placed in the mold 6 without contacting the mold 6, the first oily solid 51 is covered by the second oily solid 52 at the tip side of the stick-shaped cosmetic 2, which is likely to be seen by the user and likely to be consumed through use, and the above-mentioned effect can be advantageously obtained.

Furthermore, when the first oily solid 51 is placed in the mold 6 without contacting the mold 6, a core serving as a mold for the first oily solid is not used as in the conventional method, and therefore defects such as depressions are not generated in the second oily solid 52 due to negative pressure or external force generated when the core is pulled out. Thus, a stick-shaped cosmetic 2 in which the first oily solid 51 is covered with the second oily solid 52 can be efficiently manufactured. It is easy to manufacture even if the second oily solid 52 is soft or thin, and it is also easy to manufacture a stick-shaped cosmetic 2 having a layer structure as designed regardless of the hardness or thickness of the second oily solid 52.
When the stick-shaped cosmetic material 2 is manufactured as an oily solid material, the outermost layer of the stick-shaped cosmetic material 2 does not crumble and a beautiful surface without defects can be formed, so that even if the stick-shaped cosmetic material has a design in which the tip of the second oily solid material 52 is decorated, for example, the stick-shaped cosmetic material 2 can be manufactured with a surface shape as designed.
The stick-shaped cosmetic material 2 may be such that at least one end 51a of the first oily solid material 51, which is the other end in the axial direction Z, and an end of the first oily solid material 51 continuous with this end, are covered by the second oily solid material 52. In this case, the above-mentioned effects can be obtained at least on the side of the one end 51a of the first oily solid material 51, i.e., at least on the tip side of the stick-shaped cosmetic material 2.

When the second oily solid 522 in a molten state is filled into the mold 6 in the filling step, the amount of the second oily solid 522 in a molten state required to form the second oily solid 52 may be filled into the mold 6 at once, but it is also assumed that the second oily solid 522 in a molten state may not be sufficiently supplied to the gap between the outer surface of the first oily solid 51 and the inner surface of the mold 6 due to the influence of the viscosity of the second oily solid 522 in a molten state and the shape of the first oily solid 51. From the viewpoint of easily filling this gap with the second oily solid 522 in a molten state, the entire amount of the filling amount required to form the second oily solid 522 does not have to be filled into the mold 6 at once, and may be filled in several times. In other words, the method of filling the second oily solid 522 in a molten state into the mold 6 may be a multi-stage filling. For example, the mold 6 may first be filled with an amount of the molten second oily solid 522 sufficient to fill the gap between one end 51a of the first oily solid 51 and the bottom 6c of the mold, and then the remaining second oily solid 522 may be filled into the mold 6.

The first oily solid 51 may be placed at a distance from the bottom 6c so that the gap between the end 51a of the first oily solid 51 and the bottom 6c of the mold is slightly larger than a predetermined value determined in advance by design. In this state, the second oily solid 522 in a molten state may be filled in the gap, and the first oily solid 51 may be moved toward the bottom 6c before the second oily solid 522 solidifies, thereby reducing the gap to a predetermined value. Similarly, the gap between the outer surface of the first oily solid 51, preferably the ridge 55a that is the outer periphery of the oily solid 51, and the inner surface 6e of the mold 6 may be reduced by further moving the first oily solid 51 in the direction perpendicular to the axis after filling with the second oily solid 522 in a molten state.

The preparation step includes a forming step of forming the first oily solid 51 using a mold 7 different from the mold 6 used in the filling step and the setting step. Therefore, since the setting step and the filling step can be performed independently of the preparation step, the manufacturing method of the first embodiment has good productivity for the stick-shaped cosmetic 2. In detail, for example, in the same manufacturing line, while the setting step or the filling step for manufacturing one stick-shaped cosmetic 2 is being performed, the preparation step for manufacturing the next stick-shaped cosmetic 2 can be performed. In this way, according to the manufacturing method of the first embodiment, the stick-shaped cosmetic 2 can be efficiently produced. In addition, after the preparation step is performed using multiple molds 7 with different shapes of the internal space 7e and multiple first oily solids 51 with different shapes are manufactured, the setting step or the filling step can be performed using the same mold 6 for each of the multiple first oily solids 51. In this way, according to the manufacturing method of the first embodiment, when manufacturing stick-shaped cosmetic 2 with different shapes of the first oily solid 51, it is not necessary to prepare a mold 6 for each stick-shaped cosmetic 2 to be manufactured. Therefore, stick-shaped cosmetic 2 with different shapes of the first oily solid 51 can also be efficiently manufactured.

According to the manufacturing method of the first embodiment, since it is not necessary to use a core that is an auxiliary type, the first oily solid 51 covered by the second oily solid 52 can be formed into a shape having an undercut portion 70. As described above, the undercut portion 70 has a first portion 54 and a second portion 55 located closer to one end 51a of the first oily solid 51 than the first portion 54 and adjacent to the first portion 54 in the axial direction Z, and the distance R1 from the axis Y to the outer surface 54a of the first portion 54 is smaller than the distance R2 from the axis Y to the outer surface 55a of the second portion 55. Therefore, it is possible to realize a shape of the first oily solid 51 that could not be formed when using a conventional core, which gives the user a sense of surprise and interest, and improves the design.

Specifically, the first oily solid 51 may have a first surface 56 in which a part of the outer surface faces the other end 51b (one side in the axial direction Z where the first oily solid 51 is exposed to the outer surface of the second oily solid 52). This allows the first oily solid 51 to be formed inside the second oily solid 52 in a shape that is difficult to achieve with a core. The first surface 56 may be, for example, a reverse tapered surface with respect to the insertion direction Z1.
Furthermore, the first oily solid 51 may have a second surface 57 on a part of its outer surface facing the one end 51a side (the other side in the axial direction Z). This increases the variation in the shape of the first oily solid 51. The second surface 57 may be, for example, a forward tapered surface with respect to the insertion direction Z1.
The second surface 57 may be formed to face the first surface 56 in the axial direction Z. This makes it possible to realize a complex shape in which a part of the second oily solid material 52 is sandwiched between the first surface 56 and the second surface 57 in the axial direction Z. For example, the first oily solid material 51 having a complex shape, such as the spiral shape described in the first embodiment, can be formed inside the second oily solid material 52.

3(b), the stick-shaped cosmetic material 2 produced by the production method of the first embodiment has a surface 52c of the second oily solid material 52 covering the first oily solid material 51 formed into a tubular shape, specifically a cylindrical shape, extending in the axial direction Z. According to the production method of the first embodiment, since there is no need to use an auxiliary core, the shape of a predetermined portion of the first oily solid material 51 covered by the second oily solid material 52 can be formed so that the minimum distance R3 in the axis-perpendicular direction from the surface 52c of the second oily solid material 52 to a first portion 54 located on one side in the axial direction Z is greater than the minimum distance R4 in the axis-perpendicular direction from the surface 52c of the second oily solid material 52 to a second portion 55 located on the other side in the axial direction Z.
Therefore, the freedom in setting the thickness of the second oily solid 52 covering the first oily solid 51 at any position in the axial direction Z can be improved, and an internal shape of the second oily solid 52 that could not be formed when using a conventional core can be realized, which gives the user a sense of surprise and interest and improves the design.
The second oily solid matter 52 covers at least a part of the first oily solid matter 51 over the entire range in the axial direction, thereby making it possible to more effectively obtain the above-mentioned effects of the manufacturing method according to the first embodiment.

(Second embodiment)
The second embodiment will be described with reference to FIG.
In the first embodiment, the first oily solid 51 prepared in the preparation step is placed in the mold 6 in the installation step, and then the second oily solid 522 in a molten state is filled in the mold 6 in the filling step. In contrast, the manufacturing method of the oily solid in this embodiment includes (1) a preparation step, (2) a filling step, (3) an installation step, and (4) a mold removal step in this order. That is, in the manufacturing method of the oily solid in this embodiment, the installation step is performed after the filling step. Among these steps, the preparation step and the mold removal step are the same steps as those described in the first embodiment. In addition, the first oily solid 51 is also the same as that in the first embodiment. Therefore, here, the differences from the first embodiment will be mainly described. The installation method of the first oily solid 51 is similar to the installation method described in the first embodiment.

In the second embodiment, the first oily solid 51 is prepared by forming it in the preparation step shown in FIG. 4(a), and then the filling step shown in FIG. 4(b) is performed. In the filling step, the mold 6 is filled with a required amount of the second oily solid 522 in a molten state. The amount to be filled is preferably an amount that does not cause the second oily solid 522 in a molten state to overflow from the opening 6d of the mold 6 when the first oily solid 51 is submerged in the second oily solid 522 in a molten state and placed in the mold 6. The amount of the second oily solid 522 in a molten state filled in the filling step varies depending on the volume of the first oily solid 51, but is, for example, about 1/5 to 4/5 of the total volume of the internal space of the mold 6.

4(c), in the installation step, the first oily solid material 51 is inserted from the opening 6d in the insertion direction Z1 to be submerged in the second oily solid material 522 in a molten state filled in the mold 6, and is installed so that the first oily solid material 51 buried in the second oily solid material 522 is not in contact with the mold 6. Here, similar to the first embodiment, the first oily solid material 51 is installed so that one end 51a of the first oily solid material 51 is not in contact with the bottom 6c of the mold 6, and the first oily solid material 51 is not in contact with the inner surface 6e of the mold 6.
After the first oily solid material 51 is placed, the filled second oily solid material 522 in a molten state solidifies, and the outer surface of the first oily solid material 51, including one end 51a, is covered with the solidified second oily solid material 52 to form a solidified body 200, after which the mold removing step shown in Fig. 4(d) is carried out. In the mold removing step, the two split molds 6a, 6b are separated to remove the solidified body 200, and when the solidified body 200 has completely solidified, the stick-shaped cosmetic material 2 is completed.

According to the manufacturing method of the second embodiment, the first oily solid material 51 formed in advance in the preparation process is placed in the mold 6 filled with the second oily solid material 522 in a molten state to manufacture the stick-shaped cosmetic material 2. As in the manufacturing method of the first embodiment, the core used as an auxiliary mold is not required, and the manufacturing process can be simplified. In addition, even if the gap between the outer surface of the first oily solid material 51 and the inner surface of the mold 6 (for example, between one end 51a and the bottom 6c) is small or complex, it is easy to sufficiently spread the second oily solid material 52 in this gap. Since the second oily solid material 522 in a molten state is filled into the mold 6 in which the first oily solid material 51 is not placed, the filling of the second oily solid material 522 can be easily performed. Furthermore, since the opening 6d can be shared as the insertion port for the first oily solid material 51 and the filling port for the second oily solid material 522 in a molten state, the mold 6, etc. can be simplified.

From the viewpoint of spreading the second oily solid 52 sufficiently between one end 51a of the first oily solid 51 and the bottom 6c of the mold 6, in the filling step, the mold 6 may be filled with the second oily solid 522 in a molten state in an amount sufficient to spread the second oily solid 522 in a molten state in the gap between the one end 51a and the bottom 6c of the mold 6, and after the first oily solid 51 is placed in this state, the remaining second oily solid 52 in a molten state may be filled. In other words, the method of filling the second oily solid 522 in a molten state into the mold 6 may be a multi-stage filling method.

In the first and second embodiments, the setting step of setting the first oily solid material 51 in the mold 6 is provided before or after the filling step, but the timing of performing the setting step is not limited to this embodiment. For example, in a method for producing an oily solid material that includes a preparation step, a filling step, and a setting step, the setting step of setting the first oily solid material 51 in the mold 6 may be performed simultaneously with the filling step. In this case, the production time is shortened by the time that the filling step and the setting step overlap, and the production of the stick-shaped cosmetic material 2, which is an oily solid material, can be expedited.
Furthermore, the temperature and hardness of the molten second oily solid material 522 in the mold 6 can be easily controlled at the timing when the first oily solid material 51 is placed.
When the first oily solid material 51 and the second oily solid material 52 are placed in the mold 6 through the opening 6d, if it is expected that the two operations will interfere with each other, a filling port for filling the mold 6 with the second oily solid material 522 in a molten state may be provided in the mold 6 in addition to the opening 6d which serves as an insertion port for the first oily solid material 51. In this case, although the structure of the mold 6 becomes complicated, there is an advantage in that interference between the operations can be avoided.
Carrying out the filling process and the installation process simultaneously not only includes a case where the filling process and the installation process start at the same time, or the filling process and the installation process end at the same time, or the filling process and the installation process start and end at the same time, but also a case where part of the installation process of the first oily solid 51 and part of the filling process of the second oily solid 52 overlap.

(Third embodiment)
The third embodiment will be described with reference to FIG.
The manufacturing method of the oily solid material of the third embodiment includes a preparation step, a placement step, a filling step, and a demolding step, similar to the first embodiment, but the shape of the first oily solid material and the placement step are different from those of the first embodiment.
The first oily solid 51A used in the third embodiment is formed in a bicone shape with two truncated cones joined at their bottoms in the axial direction Z, as shown in Fig. 5(a). The first oily solid 51A is formed by filling a molten first oily solid 511 in a mold (not shown) different from the mold 6 in a preparation step and solidifying it. The first oily solid 51A extends in the axial direction Z, and one end 51Aa and the other end 51Ab of the first oily solid 51A located at both ends in the axial direction are formed as circular flat surfaces in cross section in the direction perpendicular to the axis. In this embodiment, the diameters of the one end 51Aa and the other end 51Ab are the same.

The first oily solid 51A has a shaft portion 51Ac extending in the axial direction Z so as to connect one end 51Aa and the other end 51Ab. The shaft portion 51Ac is an imaginary cylindrical portion having the diameter of the one end 51Aa and the other end 51Ab when the one end 51Aa and the other end 51Ab are connected by an imaginary line parallel to the axis Y. The first oily solid 51A has a first surface 58, a second surface 59, and a connecting portion 60 between the first surface 58 and the second surface 59 on its outer surface 51Ad. The first surface 58 is formed as an inclined surface facing the other end 51Ab in the axial direction Z, with the connecting portion 60 as a boundary. The second surface 59 is formed as an inclined surface facing the one end 51Aa in the axial direction Z, with the connecting portion 60 as a boundary. The connecting portion 60 constitutes a ridge line connecting the first surface 58 and the second surface 59, and is formed at a position dividing the first oily solid 51A into two equal parts in the axial direction Z. The first oily solid 51A has a circular cross-sectional shape in the direction perpendicular to the axis at the connecting portion 60, and the diameter of the circular cross-sectional shape is larger than the diameters of the one end 51Aa and the other end 51Ab.
The first surface 58 forms an inclined surface that expands in diameter from the other end 51Ab toward the connecting portion 60, and the second surface 59 forms an inclined surface that contracts in diameter from the connecting portion 60 toward the one end 51Aa. In other words, the first surface 58 forms a reverse tapered surface with respect to the insertion direction Z1, and the second surface 59 forms a forward tapered surface with respect to the insertion direction Z1. The connecting portion 60 is a part of the outer surface of the first oily solid material 51A.

In the third embodiment, as shown in FIG. 5(b), the first oily solid 51A is placed in the placement step so that one end 51Aa of the first oily solid 51A, which is the end in the insertion direction, is in contact with the bottom 6c of the mold 6. The total length H1 of the first oily solid 51A in the axial direction Z is the same as the depth H2 of the internal space of the mold 6, and when the first oily solid 51A is placed in the mold 6 with one end 51Aa in contact with the bottom 6c of the mold 6, the other end 51Ab is formed to be flush with the end surface 6f of the mold 6. The first oily solid 51A is placed in the mold 6 so that the outer surface 51Ad, which is a portion other than the one end 51Aa and the other end 51Ab, is in a non-contact state with the inner surface 6e of the mold 6. In other words, the first oily solid 51A is placed in the mold 6 so that its outer surface, except for one end 51Aa, is not in contact with the mold 6.

After placing the first oily solid 51A, the second oily solid 522 in a molten state is filled into the mold 6 as shown in FIG. 5(c) and solidified. The mold removal step shown in FIG. 5(d) is then performed to remove the solidified body 200 from the mold 6, and when the solidified body 200 has completely solidified, the stick-shaped cosmetic 2A is completed. The first oily solid 51A has a first surface 58 and a second surface 59 on all outer surfaces except for one end 51Aa and the other end 51Ab. Note that FIG. 5 illustrates an embodiment in which the filling step is performed after the placing step, but in the third embodiment, the placing step may be performed after the filling step or simultaneously with the filling step.

According to the manufacturing method of the third embodiment, the first oily solid material 51 is placed so that one end 51a, which is the end in the insertion direction of the first oily solid material 51, is in contact with the mold 6. This makes it easy to position the first oily solid material 51 in the insertion direction Z1.
In addition, since no gap is formed between the one end 51Aa and the bottom 6c of the mold 6, the one end 51Aa of the first oily solid 51A is exposed on the end surface 52a of the second oily solid 52 when the mold 6 is removed. Therefore, even in the early stage of using the stick-shaped cosmetic 2A, the first oily solid 51A inside the second oily solid 52 can be directly seen, improving the design of the end surface 52a. On the other hand, in the area covered by the second oily solid 52 other than the one end 51Aa of the first oily solid 51A, the second oily solid 52 is opaque or transparent, thereby obtaining the same effect as the first embodiment. Therefore, in combination with the above effect at the one end 51Aa of the first oily solid 51A, the visual effect can be improved.
Moreover, the first oily solid material 51 is placed so that the outer surface of the first oily solid material 51, except for one end 51a which is the end in the insertion direction, is not in contact with the mold 6. This prevents the first oily solid material 51 from being subjected to an external force in a direction other than the insertion direction Z1, making it easy to place the first oily solid material 51 without deforming it.

In the stick-shaped cosmetic 2A manufactured by the manufacturing method of the third embodiment, the outer surface 51Ad of the first oily solid 51A covered by the second oily solid 52 has a first surface 58 that is a reverse tapered inclined surface facing the other end 51Ab side (one side in the axial direction Z), so that a shape that is difficult to achieve with a core can be realized. In addition, the stick-shaped cosmetic 2A further has a second surface 59 facing the one end 51Aa side (the other side in the axial direction Z) of the first oily solid 51A, so that the variation in the shape of the first oily solid 51 can be increased. As a result, for example, the outer surface 52c of the second oily solid 52 wears down with use, and the outer surface 51Ac of the first oily solid 51 is exposed, so that the pattern on the outer surface of the stick-shaped cosmetic 2A changes into various shapes, giving the user a sense of surprise and interest. In the stick-shaped cosmetic material 2A, the inclined surfaces of the first oily solid material 51A other than the one end 51Aa and the other end 51Ab are the first surface 58 and the second surface 59, but the first oily solid material 51A may be shaped like cones arranged in the axial direction Z so that their bases touch each other, and the entire surface of the first oily solid material 51A may be formed as the first surface 58 and the second surface 59.

(Fourth embodiment)
The fourth embodiment will be described with reference to FIG.
The manufacturing method of the oily solid material of the fourth embodiment includes a preparation step, a placement step, a filling step, and a demolding step, similar to the first embodiment, but the shape of the first oily solid material and the placement step are different from those of the first embodiment.
The first oily solid 51B used in the fourth embodiment is, as shown in FIG. 6(a), extended in the axial direction Z, has a plurality of cylindrical parts with different outer diameters in the axial direction Z, and has a substantially cylindrical shape with a plurality of steps formed on the surface. The first oily solid 51B is formed by filling a molten first oily solid 511 in a mold (not shown) different from the mold 6 in a preparation step and solidifying it. The first oily solid 51B has one end 51Ba which is the end on the other side in the axial direction Z, and the other end 51Bb which is the end on one side in the axial direction Z. The one end 51Ba and the other end 51Bb of the first oily solid 51B are formed as circular flat surfaces. In this embodiment, the diameters of the one end 51Aa and the other end 51Ab are the same.

The first oily solid 51B has a shaft portion 51Bc extending in the axial direction Z so as to connect one end 51Ba to the other end 51Bb. The shaft portion 51Bc is a cylindrical portion connecting one end 51Ba to the other end 51Bb with an imaginary line parallel to the axis Y. The first oily solid 51B has a large diameter portion 51Be formed at a position that divides the first oily solid 51B into two equal parts in the axial direction Z. The large diameter portion 51Be is the portion of the first oily solid 51B in the axial direction Z that protrudes most from the shaft portion 51Bc in the direction perpendicular to the axis. The outer surface 51Bd of the first oily solid 51B is formed so that the outer diameter increases stepwise from the one end 51Ba and the other end 51Bb toward the large diameter portion 51Be.

In the fourth embodiment, as shown in Fig. 6(b), in the installation step, the first oily solid 51B is installed so that a part or all of the outer surface 51Bf of the large diameter portion 51Be, which is a part of the outer surface 51Bd of the first oily solid 51B, is in contact with the inner surface 6e of the mold 6. From the viewpoint of making it easier to fill the inside of the mold 6 with the second oily solid 522 in a molten state, it is preferable to install the first oily solid 51B so that not all but a part of the outer surface 51Bf of the large diameter portion 51Be is in contact with the inner surface 6e of the mold 6. In this installation step, the first oily solid 51B is installed in the mold 6 so that one end 51Ba is in a non-contact state with the bottom 6c of the mold 6. The first oily solid 51B is arranged so that the other end 51Bb is flush with the end surface 6f of the mold 6 when installed in the mold 6.
After the first oily solid material 51B is placed, the mold 6 is filled with a molten second oily solid material 522 as shown in Fig. 6(c) and solidified, and then the mold removal step shown in Fig. 6(d) is carried out to remove the solidified body 200 from the mold 6, and when the solidified body 200 has completely solidified, the stick-shaped cosmetic material 2B is completed. Note that, although Fig. 6 shows an embodiment in which the filling step is carried out after the placing step, in the fourth embodiment, the placing step may be carried out after the filling step or simultaneously with the filling step.

According to the manufacturing method of the fourth embodiment, the first oily solid material 51 is placed so that the outer surface of the first oily solid material 51, except for one end 51a which is the end in the insertion direction, is in contact with the mold 6. This makes it easy to position the first oily solid material 51 in the directions other than the insertion direction Z1.
Furthermore, since no gap is formed between all or part of the outer surface 51Bf of the large diameter portion 51Be, which is part of the outer surface 51Bd of the first oily solid material 51B, and the inner surface 6e of the mold 6 as in the first embodiment, all or part of the outer surface 51Bf of the first oily solid material 51B is exposed on the surface 52c of the second oily solid material 52 when the mold 6 is removed. Therefore, even in the early stages of using the stick-shaped cosmetic material 2B, the outer surface 51Bf, which is part of the first oily solid material 51B, can be directly and visually observed on the surface 52c of the second oily solid material 52, thereby improving the design of the surface 52c.
On the other hand, in the area covered by the second oily solid 52 other than the outer surface 51Bf of the first oily solid 51A, the second oily solid 52 is opaque or transparent, so that the same effect as in the first embodiment can be obtained. Therefore, in combination with the above-mentioned effect on the outer surface 51Bf of the first oily solid 51A, the visual effect can be improved.
Similarly, since one end 51Ba and the bottom 6c of the mold 6 are not in contact with each other, one end 51Ba of the first oily solid 51 is covered by the second oily solid 52, which gives the user a sense of surprise and interest and also achieves high design quality.

In this embodiment, the outer surface 51bf of the large diameter portion 51Be of the first oily solid 51B is described as a part of the outer surface 51Bd of the first oily solid 51B, and this part is described as being in contact with the inner surface 6e of the mold 6, but the part of the outer surface 51Bd of the first oily solid 51B that is in contact with the inner surface 6e of the mold 6 is not limited to one part of the large diameter portion 51Be. For example, multiple parts formed at intervals in the circumferential direction on the outer surface 51Bd of the first oily solid 51B may be in contact with the inner surface 6e of the mold 6. Here, the part of the outer surface 51Bd of the first oily solid 51B does not include one end 51Ba or the other end 51Bb.

As described above, according to the stick-shaped cosmetics 2A and 2B manufactured by the manufacturing method of the oily solid material described in the third and fourth embodiments, any part of the first oily solid material 51A, 51B located inside the second oily solid material 52 is formed in a state where it is partially exposed to the outside of the second oily solid material 52. This allows the user to be impressed by the interesting appearance of the stick-shaped cosmetics 2A and 2B.

(Fifth embodiment)
The fifth embodiment will be described with reference to FIG.
The manufacturing method of the oily solid material in the fifth embodiment includes the steps of a preparation step, a placement step, a filling step, and a demolding step, similar to the first embodiment, but the shapes of the first oily solid material and the second oily solid material are different from those in the first embodiment.
The first oily solid 51C used in the fifth embodiment has a substantially dome shape as shown in Fig. 7(a), and is formed into a substantially hemispherical shape in which one truncated cone and one hemisphere are joined at their bottom parts in the axial direction Z. The first oily solid 51C is formed into the above shape by filling a molten first oily solid 511 in a mold (not shown) different from the mold 6A in a preparation step and solidifying it. The first oily solid 51C extends in the axial direction Z and has one end 51Ca which is the end on the other side in the axial direction Z and the other end 51Cb which is the end on one side in the axial direction Z. The one end 51Ca has a vertical cross section in the shape of an arc, and the other end 51Cb is formed as a circular flat surface.

The first oily solid 51C has a shaft portion 51Cc extending in the axial direction Z so as to connect one end 51Ca and the other end 51Cb. The shaft portion 51Cc is an imaginary cylindrical portion formed around the axis Y when the one end 51Ca and the other end 51Cb are connected by an imaginary line parallel to the axis Y. The outer surface 51Cd of the first oily solid 51C has a first surface 56A. The first surface 56A forms an inclined surface whose diameter increases from the other end 51Cb side toward the one end 51Ca side, and is connected to the bottom surface of the hemisphere. The first surface 56A is formed as an inclined surface facing the other end 51Cb side in the axial direction Z.
The connecting portion 60A forms a ridge line that connects to the end 51Cf on the one end 51Ca side of the first surface 56A. In this embodiment, the connecting portion 60A forms the maximum diameter portion of the first oily solid material 51C. The first surface 56A forms an inversely tapered surface with respect to the insertion direction Z1. The connecting portion 60A is also a part of the outer surface of the first oily solid material 51C.

In the vertical cross section of the mold 6A in the axial direction Z, the internal space of the mold 6A forms a recess with a semicircular arc shape on the bottom 6Ac side. In the installation step of the present embodiment, the first oily solid 51C is installed in the mold 6A so as to be in a non-contact state with the inner surface 6Ae and the bottom 6Ac of the mold 6A. Specifically, the first oily solid 51C is installed so that one end 51Ca of the first oily solid 51C is in a non-contact state with the bottom 6Ac of the mold 6A and the connecting portion 60A is in a non-contact state with the inner surface 6Ae of the mold 6A.
After the first oily solid 51C is placed, the mold 6A is filled with the second oily solid 522 in a molten state as shown in Fig. 7(c). In this filling step, the second oily solid 522 in a molten state is filled such that one end 51Ca and an outer peripheral edge 57A of the first oily solid are covered with the second oily solid 52C after solidification. The second oily solid 522 in a molten state is preferably filled in the filling step such that the liquid level is flush with the other end 51Cb of the first oily solid 51C.

After the second oily solid 522 has solidified, the mold removal process shown in FIG. 7(d) is performed to remove the solidified body 200 from the mold 6A, and when the solidified body 200 has completely solidified, it is completed as a stick-shaped cosmetic material 2C. As shown in FIG. 7(d), the completed stick-shaped cosmetic material 2C has a hemispherical shape on the bottom 6Ac side of the mold 6A and a cylindrical shape on the opening 6Ad side of the mold 6A. Note that while FIG. 7 illustrates an embodiment in which the filling process is performed after the installation process, in the fifth embodiment, the installation process may be performed after or simultaneously with the filling process.

The stick-shaped cosmetic material 2C manufactured by the manufacturing method of the fifth embodiment has a dome-shaped end 52Ca of the second oily solid material 52C located on the free end side, which allows for a variety of geometric designs for the stick-shaped cosmetic material.

In the filling step described in each embodiment, the mold 6, 6A may be filled with the second oily solid 522 heated to a temperature lower than a temperature 25°C higher than the melting point of the first oily solid 51-51C (melting point of the first oily solid + 25°C). When the second oily solid 522 is filled under such temperature conditions, the outer surface of the first oily solid 51-51C is not easily melted by the heat from the second oily solid 522, so that the shape of the first oily solid 51-51C is easily maintained, and it is easy to clarify the boundary between the first oily solid 51-51C and the solidified second oily solid 52, 52C. By clarifying the boundary between the first oily solid 51-51C and the solidified second oily solid 52, 52C, it is possible to realize the desired design and usability. From this viewpoint, the temperature of the molten second oily solid material 522 to be filled is preferably the melting point of the first oily solid material 51 to 51C + 20° C. or lower.
The temperature of the molten second oily solid material 522 starts to drop from the moment it is placed in the mold 6, 6A due to heat loss by the mold 6, 6A and, if already placed, the first oily solid material 51 to 51C. Therefore, the above effect can be obtained by setting the temperature of the molten second oily solid material 522 at the time of filling to a temperature not lower than the melting point of the first oily solid material 51 to 51C, but lower than a temperature about 25°C higher than the melting point.

Furthermore, in the case where the first oily solid 51 is placed in the mold 6 after the filling step as in the second embodiment, even if the temperature of the second oily solid 522 in a molten state at the time of filling is the melting point of the first oily solid 51 + 25°C or higher, it is sufficient that the temperature of the second oily solid 522 filled in the mold 6 has dropped to below the melting point of the first oily solid 51 + 25°C by the time the first oily solid 51 is placed in the mold 6.
The melting point of the oily solid is measured by any one of the general test methods, Method 1, Method 2, or Method 3, in the Standards for Quasi-Drug Raw Materials. When the melting point is high, such as above 80° C., Method 1 can be used, when the melting point is lower than this, Method 2 can be used, and when the melting point is even lower, Method 3 can be used.

In the filling step described in each embodiment, the mold 6, 6A may be filled with the second oily solid 522 in a molten state that has been heated to a temperature that is 25° C. or more higher than the melting point of the first oily solid 51 to 51C (the melting point of the first oily solid 522+25° C. or more), preferably to a temperature that is 40° C. or more higher than the melting point of the first oily solid 51 to 51C.
When the second oily solid 522 is filled under such temperature conditions, the outer surface of the first oily solid 51-51C is fused with the second oily solid 522, and it becomes easy to make the boundary between the first oily solid 51-51C and the solidified second oily solid 52, 52C unclear. By making the boundary between the first oily solid 51-51C and the solidified second oily solid 52, 52C unclear, it is possible to realize a desired design and usability. An unclear boundary includes, for example, a state in which the boundary portion is so-called marbled, that is, a state in which multiple streaks are intertwined.

The manufacturing methods of the first to fifth embodiments may include a cooling step. In the cooling step, the second oily solid material 522 in a molten state is forcibly cooled to promote solidification of the second oily solid material 522. In the cooling step, means for forcibly cooling the second oily solid material 522 in a molten state include placing the mold 6 filled with the second oily solid material 522 in a low-temperature space, applying cold air to the second oily solid material 522 in a molten state, applying cold air, cold water or a cooling plate to the mold 6 filled with the second oily solid material 522 in a molten state, and the like.
The manufacturing methods of the first to fifth embodiments preferably include a cooling step, from the viewpoint of promoting solidification of the molten second oily solid material 522, preventing the second oily solid material 522 from crumbling and causing defects in the second oily solid material 52, and making it possible to easily manufacture the stick-shaped cosmetics 2 to 2C without defects.

In each of the above-mentioned embodiments, a step of adhering powder 61 to the outer surface of the first oily solid material 51 to 51C may be further included before the placing step, preferably between the preparation step and the placing step, as shown in Fig. 8. Fig. 8 shows a state in which the powder 61 is adhered to the outer surface 51Cd of the first oily solid material 51C described in the fifth embodiment.
By attaching the powder 61 to the outer surface 51Cd in this manner, it becomes easy to clarify the boundary between the first oily solid matter 51 to 51C and the second oily solid matter 52, 52C, thereby making it possible to realize the desired design and usability. As the powder 61, the same powder as that contained in the first oily solid matter or the second oily solid matter can be used.

The stick-shaped cosmetics 2 to 2C manufactured by the manufacturing method of the present invention can be attached to a cosmetics container 3 and used as described above. Regarding the cosmetics container 3 shown in Figures 1 and 9, the cosmetics container 3 is equipped with a bottomed cylindrical inner plate 10 having a storage space S for storing the lower end region 2a of the stick-shaped cosmetics 2B of the fourth embodiment, which is an example of an oily solid material, a lifting mechanism 20 for the inner plate 10, and an outer cylinder 30 for storing the inner plate 10. The inner plate 10 has an annular peripheral wall portion 11 and a bottom portion 12. The lifting mechanism 20 for the inner plate 10 is connected to the bottom portion 12 of the inner plate 10. In addition, the bottom portion 12 of the inner plate 10 is provided with a through hole for discharging air from the storage space S to the outside of the storage space S when the lower end region 2a of the stick-shaped cosmetics 2 is stored.

The lifting mechanism 20 has a lifting base 21. The lifting base 21 has a cylindrical shape, and has a plurality of annular steps extending in the circumferential direction on its outer circumferential surface. Among the plurality of annular steps, the first step 21a located at the lowest position engages with an engagement protrusion protruding from the inner circumferential wall of the main body base 40 when the lifting mechanism 20 is housed in the main body base 40 described later. The second step 21b is located above the first step 21a and is adapted to engage with an engagement annular protrusion 31 formed in the lower end region of the outer tube 30 when the lifting mechanism 20 is housed in the outer tube 30. The third step 21c is formed above the second step 21b. An O-ring 24 is attached to the third step 21c as shown in FIG. 9.

When the lift base 21 is viewed in cross section, its central region is a space. A female screw is provided on the inner peripheral wall that defines this space. The first lift unit 22 is inserted into the space. A male screw 22a is provided on the outer surface of the first lift unit 22. This male screw 22a screws into the female screw of the lift base 21 described above. When the first lift unit 22 is inserted into the space of the lift base 21, the first lift unit 22 is rotated around its axis to advance the screwing of the male screw 22a and the female screw. As the screwing advances, the first lift unit 22 descends. By reversing the direction of rotation of the first lift unit 22, the first lift unit 22 ascends. The descent of the first lift unit 22 is restricted by the flange portion 22c abutting against a step portion near the upper end of the lift base 21.

The first lifting/lowering section 22 has a female thread on its inner peripheral wall that defines a space formed therein. The second lifting/lowering section 23 is inserted into the space inside the first lifting/lowering section 22. The outer surface of the second lifting/lowering section 23 has a male thread 23a. This male thread 23a is adapted to screw into the female thread of the first lifting/lowering section 22 described above. When the second lifting/lowering section 23 is inserted into the space of the first lifting/lowering section 22, the second lifting/lowering section 23 is rotated around its axis to advance the screwing of the male thread 23a and the female thread. As the screwing advances, the second lifting/lowering section 23 descends. By reversing the direction of rotation of the second lifting/lowering section 23, the second lifting/lowering section 23 ascends.

The outer cylinder 30 is a thin-walled cylindrical member, and can accommodate the above-mentioned inner plate 10 and lifting mechanism 20 inside. The lower edge of the outer cylinder 30 is located on a plane perpendicular to the axis Y of the outer cylinder 30, and the upper edge 30a of the outer cylinder has a circumferential shape of the bottom surface of an oblique cylinder. The upper edge 30a has an uppermost point 30b and a lowermost point 30c. The lower end region of the outer cylinder 30 is provided with an engaging annular protrusion 31 that protrudes toward the space inside the outer cylinder 30, and the engaging annular protrusion 31 engages with the second step portion 21b of the lifting base 21 of the lifting mechanism 20. The inner plate 10 can be moved up and down inside the outer cylinder 30 by the lifting mechanism 20, but when the outer cylinder 30 is held in one hand and the main body base 40 is rotated with the other hand, the inner plate 10 does not rotate together with the outer cylinder 30. When viewed in cross section, the main body base 40 has a central region that defines a space 41. The outer cylinder 30, the lifting mechanism 20, and the lower end region 2a of the stick-shaped cosmetic material 2 are housed within this space 41. An engaging protrusion 42 (not shown) is provided on the inner peripheral wall that defines the space 41 of the main body base 40, and is adapted to engage with the first step 21a of the lifting base 21 of the lifting mechanism 20.

The method for producing an oily solid product of the present invention has been described above based on its preferred embodiments, but the method for producing an oily solid product of the present invention is not limited to the above-mentioned embodiments.
In the first to fifth embodiments, the mold 6 is filled with the second oily solid material 522 in a molten state in the filling step, but instead, a container may be filled with the second oily solid material 522 in a molten state. The container is a container for storing the oily solid material produced by the production method of the present invention. An example of the container is a cosmetic container 3 to which a stick-shaped cosmetic material 2 is attached.

A method for filling the cosmetic container 3 with the second oily solid material 522 in a molten state in the filling step will be described with reference to Fig. 10. Regarding the embodiment shown in Fig. 10, only the points different from the first embodiment will be described. Points not specifically described about the embodiment shown in Fig. 10 are the same as those in the first embodiment, and the description of the first embodiment applies as appropriate. In the embodiment shown in Fig. 10, the stick-shaped cosmetic material 2 is produced in an upright state.
In the embodiment shown in Fig. 10, a preparation step is first performed to prepare a first oily solid material 51. The preparation step can be performed in the same manner as in the first embodiment. The mold used in the preparation step is different from the cosmetic container 3.

Next, the installation step is performed. In the installation step, as shown in FIG. 10(a), the first oily solid 51 is installed in the cosmetic container 3. More specifically, the first oily solid 51 is installed in the space defined by the outer tube 30 and the inner plate 10. The first oily solid 51 is installed so that one end 51a of the first oily solid 51 is located on the upper edge 30a side of the outer tube 30 and the other end 51b of the first oily solid 51 is located on the bottom 12 side of the inner plate 10. When the first oily solid 51 is installed in the cosmetic container 3, the other end 51b of the first oily solid 51 is not in contact with the bottom 12 of the inner plate 10. In the embodiment shown in Fig. 10, the first oily solid material 51 is placed in the cosmetic container 3 so that the outer surface of the first oily solid material 51, preferably the ridge line 55a which is the outer periphery of the first oily solid material 51, is in a non-contact state with the inner surface of the internal space of the cosmetic container 3, i.e., the inner surface 30e of the outer cylinder 30 and the inner surface 10e of the inner wall portion 11 of the inner plate 10. There is no particular limitation on the method of placing the first oily solid material 51 in a non-contact state with the cosmetic container 3, and a method similar to the method of placing the first oily solid material 51 in a non-contact state with the mold 6 in the first embodiment can be used. In a state where the first oily solid material 51 is placed in the cosmetic container 3, one end 51a of the first oily solid material 51 may protrude from the upper edge 30a of the outer cylinder 30, or may be located closer to the bottom 12 of the inner plate 10 than the upper edge 30a of the outer cylinder 30. Also, as shown in FIG. 10(a), one end 51a of the first oily solid 51 and the upper end surface 30f defined by the upper edge 30a of the outer cylinder 30 may be flush with each other.

Next, the filling process is performed. In the filling process, as shown in FIG. 10(b), the second oily solid material 522 in a molten state is filled into the cosmetic container 3 through the opening 30d of the outer cylinder 30. When filling the second oily solid material 522 in a molten state into the cosmetic container 3, the second oily solid material 522 is filled between the first oily solid material 51 previously placed in the cosmetic container 3 and the inner surface of the internal space of the cosmetic container 3. In the embodiment shown in FIG. 10, it is preferable to fill the second oily solid material 522 so that the end of the filled second oily solid material 522 on the upper end surface 30f side of the outer cylinder 30 is flush with the upper end surface 30f. As shown in Figures 10(a) and (b), when the cosmetic container 3 is positioned so that the axis Y1 of the cosmetic container 3 is parallel to the vertical direction Z2, if the upper end surface 30f of the outer cylinder 30 is inclined with respect to the horizontal direction X perpendicular to the vertical direction Z2, the cosmetic container 3 may be tilted as shown in Figure 11 so that the upper end surface 30f of the outer cylinder 30 is parallel to the horizontal direction X, and the second oily solid 522 may be filled in this state.

In the embodiment shown in FIG. 10, the stick-shaped cosmetic 2 is completed when the second oily solid 522 filled in the cosmetic container 3 solidifies. In the embodiment shown in FIG. 10, the stick-shaped cosmetic 2 is manufactured while attached to the cosmetic container 3, so there is no need to perform a mold removal process. Therefore, according to the embodiment shown in FIG. 10, the manufacturing process of the stick-shaped cosmetic 2 can be further simplified.

10, the installation step may be performed after the filling step, or may be performed simultaneously with the filling step, as in the second embodiment. In the installation step according to the third embodiment, the first oily solid 51A is installed so that one end 51Aa of the first oily solid 51A is in contact with the bottom 6c of the mold 6. In the installation step according to the embodiment shown in FIG. 10, the first oily solid 51 may be installed so that the other end 51b of the first oily solid 51 is in contact with the bottom 12 of the container 3, i.e., the bottom 12 of the inner plate 10. In the installation step according to the fourth embodiment, the first oily solid 51 is installed so that a part of the outer surface of the first oily solid 51 is in contact with the inner surface of the mold 6. In the installation step according to the embodiment shown in FIG. 10, the first oily solid 51 may be installed so that a part of the outer surface of the first oily solid 51 is in contact with the inner surface of the container 3. More specifically, the first oily solid 51 may be placed so that the ridge 55a of the first oily solid 51 is in contact with the inner surface 30e of the outer cylinder 30 or the inner surface 10e of the peripheral wall portion 11 of the inner plate 10. When a part of the outer surface of the first oily solid 51 is in contact with the inner surface 30e of the outer cylinder 30, the exposed portion of the first oily solid 51 on the outer surface of the second oily solid 52 among the oily solids produced may be made to be visible to the user by being unrolled from the outer cylinder 30 as the inner plate 10 rises during use. In this case, a visual effect similar to that of the fourth embodiment is obtained.

12(a) and (b), the second oily solid material 522 in a molten state can be filled into a plurality of cosmetic containers 3 at the same time. In the embodiment shown in FIG. 12(a) and (b), the filling process is performed with a plurality of cosmetic containers 3 attached to a container 80 separate from the cosmetic containers 3. As shown in FIG. 12, the container 80 has an opening 82 at the bottom 81 of the container 80. The cosmetic container 3 is attached to the container 80 so that the opening 30d of the outer cylinder 30 (see FIG. 10) and the opening 82 of the container 80 communicate with each other. In the embodiment shown in FIG. 12, the second oily solid material 522 in a molten state is poured from the upper end opening 83 of the container 80, so that the second oily solid material 522 is filled into each cosmetic container 3 through each opening 82. According to the embodiment shown in FIG. 12, a plurality of stick-shaped cosmetics 2 attached to the cosmetic container 3 can be manufactured at the same time, so that the manufacturing process of the stick-shaped cosmetics 2 can be further simplified.

The amount of the second oily solid 522 in the molten state may be an amount such that the injected second oily solid 522 is flush with the upper end surface 30f of the outer cylinder 30 of each cosmetic container 3 (see FIG. 12(a)), or an amount such that the injected second oily solid 522 exceeds the upper end surface 30f of the outer cylinder 30 of each cosmetic container 3 and the second oily solid 52 is present in the container 80 (see FIG. 12(b)). As shown in FIG. 12(b), when the injected second oily solid 522 exceeds the upper end surface 30f of the outer cylinder 30 of each cosmetic container 3 and the second oily solid 52 is present in the container 80, it is preferable to perform a step of removing the second oily solid 52 that has overflowed from the cosmetic container 3. The step of removing the second oily solid 52 may be performed before the second oily solid 522 in the molten state solidifies, or may be performed after the second oily solid 522 solidifies. Methods for removing the overflowing second oily solid matter 52 include scraping off the overflowing second oily solid matter with a spatula or blade, or cutting it off with a blade such as a cutter.

In the embodiment shown in FIG. 12, the filling step is performed with the cosmetic container 3 after the installation step attached to the container 80, but the installation step may be performed after or simultaneously with the filling step with the cosmetic container 3 before the installation step attached to the container 80.

In the above-mentioned embodiments, stick-shaped cosmetics 2 to 2C are produced, but the oily solid produced by the production method of the present invention is not limited to this and may be, for example, chocolate, antiperspirant, soap, candles, medicine, interior decoration, toys, etc. As the first oily solid 51 to 51C and the second oily solid 52, 52C, any suitable material can be used depending on the oily solid produced.

The shape of the first oily solid 51 is not limited to the shapes described in each embodiment, and is not particularly limited as long as the outer surface 51d has a first surface facing one side in the axial direction Z (the side where the first oily solid 51 is exposed to the outer surface of the second oily solid 52). For example, the shape of the first oily solid 51 may be a shape having an inverted tapered surface on the outer surface, which is an inclined surface that widens from one side to the other side in the axial direction Z of the first oily solid, with the axis Y as the center, as shown in the first surface 56 shown in FIG. 3, the first surface 58 shown in FIG. 5(a), and the first surface 56A shown in FIG. 7(a). Alternatively, as shown in FIG. 6(a), the shape may be such that the diameter gradually increases from one side to the other side in the axial direction Z. The shaft portion 51c may have any shape that allows the axis Y to be conceived. The shaft portion 51c of the first and second embodiments may not have the disk portions 51e and 51g formed thereon.
Furthermore, in the first to fourth embodiments, the produced stick-shaped cosmetic materials 2 to 2B have a substantially cylindrical shape, and in the fifth embodiment, the produced stick-shaped cosmetic material 2C is hemispherical, but the shape of the oily solid material produced by the production method of the present invention is not particularly limited and may be a substantially prismatic shape, a substantially polygonal pyramid shape, a sphere, or the like, and letters, logos, pictures, patterns, and the like may be arranged on the surface by using projections and recesses.

In addition, in each embodiment, stick-shaped cosmetics 2 to 2C are produced that have a two-layer structure in which a first oily solid 51 to 51C is covered with a second oily solid 52, 51C, but the production method of the present invention can also produce oily solids that have a multi-layer structure of three or more layers.

The inner circumferential surfaces of the molds 6 and 6A and the outer surfaces of the first oily solids 51 to 51C may each have a circular cross section taken in a direction perpendicular to the axis Y, but may also have a non-circular cross section taken in a direction perpendicular to the axis Y, such as an ellipse or semicircle, a star or heart shape, or a polygonal shape such as a triangle, square, pentagon, or hexagon, or a polygon with rounded corners.

In each of the above embodiments, one first oily solid 51-51C is arranged inside each second oily solid 52, 52C, but from the perspective of freedom of design, multiple first oily solids 51-51C may be arranged.

In each embodiment, the color tone of the first oily solid 51-51C and the color tone of the second oily solid 52, 52C may be the same or different. When the color tone of the first oily solid 51-51C and the color tone of the second oily solid 52, 52C are different, the visual effect can be improved. For example, when the first oily solid 51-51C is exposed as the stick-shaped cosmetic 2-2C is used, the design is good, and the sense of surprise and interest given to the user can be improved.

An example of a stick-type cosmetic material will now be described.
In Examples 1 to 4, the stick-type cosmetic preparations contained wax, gelling agent, paste oil, liquid oil, powder, colorant, and other ingredients as shown in Table 1. In Table 1, "First" indicates the first oily solid, and "Second" indicates the second oily solid.
In Examples 1 to 3, the first oily solid and the second oily solid are respectively blended with wax, paste oil, liquid oil, powder, and colorant. The components and amounts of the first oily solid and the second oily solid are the same in Examples 1 to 3. The colorant used in the second oily solid contains a component different from the colorant used in the first oily solid. Therefore, the first oily solid and the second oily solid are different in color. In Example 4, the blended components and amounts of the first oily solid are the same as in Examples 1 to 3. The second oily solid in Example 4 contains a gelling agent, liquid oil, and colorant. The composition of the liquid oil in the second oily solid in Example 4 is different from the composition of the liquid oil in the second oily solid in Examples 1 to 3. In contrast to the second oily solid materials of Examples 1 to 3, which use multiple types of colorants, the second oily solid material of Example 4 uses only one type of colorant in a small amount. In other words, the second oily solid material of Example 4 has high transparency, unlike the second oily solid materials of Examples 1 to 3.

All of Examples 1 to 4 were produced using the manufacturing method of the first embodiment. The mold 7 for the first oily solid and the mold 6 for the second oily solid were both made of metal.

The melting points of the first and second oily solids in Examples 1 to 3 and the first oily solid in Example 4 are the same, 75°C. The melting point of the second oily solid in Example 4 is higher than that of the first oily solid, 105°C. In Examples 1 to 3, the temperature at the time of filling the second oily solid into the mold is different. Therefore, the temperature difference obtained by subtracting the melting point of the first oily solid from the temperature at the time of filling the second oily solid (hereinafter also simply referred to as "temperature difference") is different in Examples 1 to 3. Specifically, the temperature difference in Example 1 is 20°C, the temperature difference in Example 2 is 35°C, and the temperature difference in Example 3 is 50°C. The temperature at the time of filling the second oily solid in Example 4 is the same as in Example 3, 125°C. Therefore, the temperature difference is also the same in Examples 3 and 4, and is 50°C.

The stick-shaped cosmetic product produced under these conditions was visually inspected and evaluated for clarity of the boundary between the first oily solid and the second oily solid. The evaluation results are shown as effects in Table 1. In the case of Example 1, where the temperature difference was 20° C., the boundary between the two was clearly visible. This is presumably because there was almost no melting of the first oily solid due to the temperature difference at the boundary between the first oily solid and the second oily solid.
In Example 2, the temperature difference was 35° C., which was higher than in Example 1, and the boundary between the first oily solid and the second oily solid was not as clear as in Example 1, but it could be confirmed. This is presumably because the first oily solid melted slightly due to the temperature difference at the boundary between the first oily solid and the second oily solid.
In Examples 3 and 4, the temperature difference was 50° C., which was higher than in Example 2, and the boundary between the first oily solid and the second oily solid was less clear than in Example 2. This is presumably because the first oily solid melted more than in Example 2 due to the temperature difference at the boundary between the first oily solid and the second oily solid, and the melted first oily solid mixed with the second oily solid in a molten state.
In addition, when manufacturing using the manufacturing method of other embodiments, such as performing the installation process after the filling process, when using a mold 6 made of a material other than metal, or when using a container 3 instead of the mold 6, it is considered that substantially the same effects as those of Examples 1 to 4 can be obtained, although there will be an effect on the solidification speed and the like due to the difference in thermal conductivity.

2, 2A, 2B, 2C Oily solids (cosmetics)
6, 6A mold 7 Another mold 51, 51A, 51B, 51C First oily solid 51a, 51Aa, 51Ba, 51Ca Other axial end of the first oily solid 51b, 51Ab, 51Bb, 51Cb One axial end of the first oily solid 51c, 51Ac, 51Bc, 51Cc Shaft of the first oily solid 51d, 51Ad, 51Bd, 51Cd Outer surface of the first oily solid 52, 52C Second oily solid 52c Surface of the second oily solid 522 Second oily solid in a molten state 54 First portion 55 Second portion 56, 58 First surface 57, 59 Second surface 61 Powder R1 Maximum distance from the shaft portion to the outer surface of the first portion R2 R3: Maximum distance from the shaft to the outer surface of the second portion. R4: Minimum distance from the surface of the second oily solid to the second portion. Z: Axial direction. Z1: Insertion direction.

Claims (15)

A method for producing an oily solid comprising a first oily solid and a second oily solid,
A preparation step of preparing a first oily solid material having a desired shape;
A filling step of filling at least a part of the mold or container with a second oily solid material in a molten state;
a step of placing a first oily solid in the mold or the container before, after, or simultaneously with the filling step ,
The preparation step includes a forming step of forming a first oily solid material into a desired shape using a mold different from the mold,
The another mold is configured to include two split molds that can be combined and separated,
The first oily solid includes an undercut portion having a first portion and a second portion adjacent to the first portion in an axial direction of the first oily solid,
The undercut portion has a maximum distance in an axis-perpendicular direction, which is a direction perpendicular to the axis, from the axis of the first oily solid to the outer surface of the first portion, which is smaller than a maximum distance in the axis-perpendicular direction from the axis of the first oily solid to the outer surface of the second portion,
In the method for producing an oily solid, the placing step places a first oily solid in the mold or container so that the second portion is positioned closer to the insertion direction of the first oily solid than the first portion . The method for producing an oily solid according to claim 1, wherein the installation step installs the first oily solid so that the insertion direction end of the first oily solid is not in contact with the mold or the container. The method for producing an oily solid according to claim 1, wherein the installation step installs the first oily solid so that the insertion end of the first oily solid is in contact with the mold or the container. The method for producing an oily solid according to any one of claims 1 to 3, wherein the installation step installs the first oily solid so that the outer surface of the first oily solid, excluding the end in the insertion direction, is not in contact with the mold or the container. The method for producing an oily solid according to any one of claims 1 to 3, wherein the installation step installs the first oily solid so that a part of the outer surface of the first oily solid, excluding the end in the insertion direction, is in contact with the mold or the container. The method for producing an oily solid product according to any one of claims 1 to 5 , further comprising a step of attaching a powder to an outer surface of the first oily solid product prior to the placing step. 7. The method for producing an oily solid material according to claim 1 , wherein the filling step includes filling the mold or the container with a second oily solid material in a molten state that has been heated to a temperature that is lower than a temperature that is 25° C. higher than the melting point of the first oily solid material. 7. The method for producing an oily solid material according to claim 1 , wherein the filling step includes filling the mold or the container with a second oily solid material in a molten state that has been heated to a temperature that is 25° C. or more higher than the melting point of the first oily solid material. The method for producing an oily solid product according to any one of claims 1 to 8 , wherein the oily solid product produced by the method is a cosmetic product. An oily solid comprising a first oily solid having an axis and a second oily solid covering at least a portion of the first oily solid in a direction around the axis, the first oily solid being exposed on an outer surface of the second oily solid on one side in the axial direction,
a portion of the first oily solid covered by the second oily solid has an undercut portion;
The undercut portion has a first portion and a second portion adjacent to the first portion on the other side in the axial direction,
The undercut portion is an oily solid in which the maximum distance in an axis-perpendicular direction, which is a direction perpendicular to the axis, from the axis of the first oily solid to the surface of the first portion is smaller than the maximum distance in the axis-perpendicular direction from the axis of the first oily solid to the surface of the second portion. An oily solid comprising a first oily solid having an axially extending shaft portion and a second oily solid covering at least a portion of the first oily solid in a direction around the shaft, the first oily solid being exposed on an outer surface of the second oily solid on one side in the axial direction,
the first oily solid covered by the second oily solid has a first portion and a second portion adjacent to the first portion on the other side in the axial direction;
The surface of the second oily solid covering the first oily solid is cylindrical and extends in the axial direction;
An oily solid, wherein the minimum distance from the surface of the second oily solid to the first portion is greater than the minimum distance from the surface of the second oily solid to the second portion. The oily solid according to claim 10 or 11 , wherein the second oily solid covers at least a portion of the first oily solid over an entire range in a direction around the axis. The oily solid according to any one of claims 10 to 12 , wherein the other axial end of the first oily solid and an end of the first oily solid continuous with the other axial end are covered with the second oily solid. The oily solid according to any one of claims 10 to 13 , wherein the first oily solid has a different color tone from the second oily solid. The oily solid according to any one of claims 10 to 14, wherein the oily solid is a cosmetic.

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