JP7650138B2 - Manufacturing method of oily solid - Google Patents

Description

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

Conventionally, oil-based solid products with a multi-layer structure have been known. Examples of oil-based solid products include oil-based solid cosmetics such as the red flesh of lipstick, and Patent Documents 1 to 3 describe oil-based solid cosmetics in which at least a portion of a first oil-based solid cosmetic is covered by a second oil-based solid cosmetic. Methods described in Patent Documents 4 and 5 are known as methods for producing oil-based solid cosmetics with a two-layer structure.

Patent Document 4 describes a method for producing a multi-layered solid oil-based cosmetic, which includes a process of pouring a slurry-like material, which is a second oil-based solid cosmetic, into a molding die, solidifying the outer side of the slurry-like material, and then allowing the molten inner side to flow out to form an outer layer having a recess on the inner side, and a process of pouring a slurry-like material, which is a first oil-based solid cosmetic, into the recess on the inner side of the outer layer, solidifying it to form an inner layer.

Patent document 5 describes a method for producing a multi-colored stick lipstick in which a middle mold (core) is placed in the center of a cylindrical mold hole obtained by engaging a pair of left and right mold plates having semicircular mold holes, a lipstick raw material which is a second oil-based solid cosmetic is poured into the periphery of the middle mold, and after cooling and solidifying, the middle mold is removed and a lipstick raw material which is a first oil-based solid cosmetic having a different color tone is poured into the hollow body of the middle mold, and then cooled and solidified.

Special Publication No. 2013-522227 JP 2017-95452 A JP 2017-119698 A Japanese Unexamined Patent Publication No. 63-166818 (Special Publication No. 4-78602) Japanese Unexamined Patent Publication No. 61-112008

In the method described in Patent Document 4, a recess is formed into which the first oil-based solid cosmetic is poured by causing the molten portion of the second oil-based solid cosmetic to flow out. Therefore, it is difficult to control the shape of the recess, and it is difficult to control the shape of the boundary between the first oil-based solid cosmetic and the second oil-based solid cosmetic, making it difficult to accurately produce the specific shape of the designed first oil-based solid cosmetic with good reproducibility.

In the method described in Patent Document 5, the tip of the medium mold is brought into contact with the bottom of the cylindrical mold hole, so that the cavity left by the removal of the medium mold after the second oil-based solid cosmetic is cooled and solidified reaches the bottom of the mold hole. Therefore, in the multi-colored stick lipstick obtained by pouring the first oil-based solid cosmetic into the cavity left by the removal of the first oil-based solid cosmetic, the first oil-based solid cosmetic penetrates the second oil-based solid cosmetic, and the tip of the first oil-based solid cosmetic is not covered by the second oil-based solid cosmetic.

The inventor has improved the technology of Patent Document 5 to obtain an oily solid in which one end of the first oily solid located at the tip side of the middle mold is covered with a second oily solid, and developed a technology (hereinafter also referred to as the "improved technology"), which is a non-public technology, in which the second oily solid cosmetic is poured while the tip of the middle mold is separated from the bottom of the mold hole, and the first oily solid cosmetic is poured into the cavity formed by removing the middle mold after cooling and solidifying (hereinafter also referred to as the "improved technology"). However, when an oily solid in which one end of the first oily solid is covered with the second oily solid using this improved technology is produced, defects such as a recessed portion toward the first oily solid may occur in the second oily solid covering the first oily solid, and it has not been possible to reliably produce an oily solid without such defects.

The object of the present invention is to provide a method for producing an oily solid product and an oily solid product that can eliminate the drawbacks of the above-mentioned conventional techniques and unpublicized improved techniques.

The present invention is a method for producing an oily solid material in which one end of a first oily solid material is covered with a second oily solid material, the method comprising the steps of: a first filling step of filling at least a part of a bottomed mold with a molten second oily solid material; an installation step of inserting a core into the mold and installing the core so that the core is not in contact with the mold before, after, or simultaneously with the first filling step; a core removal step of removing the core from the mold; a second filling step of filling the molten first oily solid material into a recess of the second oily solid material obtained by removing the core; and a mold removal step of removing the mold, the core having a communication passage that communicates between an opening at a tip end in a direction of insertion into the mold and an opening at a base end side, The opening on the base end side is formed at a position where it will not be buried in the second oily solid when the mold is filled with the molten second oily solid and the core is placed in the mold, and when the core is placed in the mold before the molten second oily solid is filled, or when the core is placed in the mold after the molten second oily solid is filled in the mold, or when the core is placed in the mold simultaneously with the filling of the molten second oily solid in the mold, the communicating passage is closed in a state where a space is left in part of the communicating passage, and the closed state of the communicating passage is released before the core is pulled out, thereby achieving the above-mentioned object.
The present invention achieves the above-mentioned object by providing an oily solid comprising a first oily solid having a shaft, and a second oily solid covering one end of the first oily solid on the tip side and at least a part of a shaft portion extending axially continuously from the one end.

According to the method for producing an oily solid of the present invention, an oily solid can be efficiently produced in which one end of a first oily solid is covered with a second oily solid, and the second oily solid does not have defects such as depressions.
According to the oily solid of the present invention, it is possible to selectively design the appearance of the first oily solid when it is exposed from the second oily solid or when it is seen through the second oily solid, and the design of the visible surface, thereby enabling differentiation of products and improvement of their commercial value.

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 (f) are schematic cross-sectional views for explaining the manufacturing method according to the first embodiment of the present invention. 3(a) to (f) are schematic cross-sectional views for explaining a manufacturing method of the first modified example of the first embodiment of the present invention. 4(a) to (c) are schematic cross-sectional views for explaining the manufacturing method according to the second embodiment of the present invention, and FIGS. 4(a) and (b) are equivalent to FIGS. 2(a) and (b). 5(a) to (c) are schematic cross-sectional views for explaining the manufacturing method according to the third embodiment of the present invention, and correspond to FIGS. 2(a) to (c). FIG. 6 is a schematic cross-sectional view illustrating a modified example of the method for producing an oily solid material of the present invention, and corresponds to FIG. 2(b). 7(a) to (d) are schematic cross-sectional views showing modified examples of the core in the method for producing an oily solid material of the present invention, and correspond to FIG. 2(b). 8(a) to (f) are schematic cross-sectional views for explaining modified examples of the method for producing an oily solid material of the present invention. 9(a) to (h) are schematic cross-sectional views for explaining another modified example of the method for producing an oily solid material of the present invention. FIG. 10 is an exploded perspective view of the cosmetic product shown in FIG. Fig. 11(a) is a cross-sectional view taken along line A-A in Fig. 2(a) and line CC in Fig. 4(a), Fig. 11(b) is a cross-sectional view taken along line B-B in Fig. 2(a), and Fig. 11(c) is a cross-sectional view taken along line D-D in Fig. 4(c). 12A is a cross-sectional view taken along line EE in FIG. 9A, and FIG. 12B is a cross-sectional view taken along line FF in FIG. 9C. Fig. 13(a) is a schematic cross-sectional view for explaining a modified example of a mold used in the manufacturing method of the present invention, Fig. 13(b) is a vertical cross-sectional view showing an oily solid product manufactured using the mold of Fig. 13(a), and Fig. 13(c) is a vertical cross-sectional view showing an oily solid product manufactured using the core shown in Fig. 7(b). FIG. 14(a) is a schematic cross-sectional view showing the installation step of the manufacturing method of the present invention performed using another modified core, FIG. 14(b) is a schematic cross-sectional view showing the second filling step after the installation step shown in FIG. 14(a), and FIG. 14(c) is a schematic cross-sectional view explaining the structure of an oily solid produced by a manufacturing process including the installation step shown in FIG. 14(a) and the second filling step shown in FIG. 14(b).

The present invention will now be described based on its preferred embodiments.
Fig. 1 shows a cosmetic (hereinafter also referred to as "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 cosmetic 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. 10 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 Figs. 1 and 10, the stick-shaped cosmetic 2 produced by the oily solid production method of the present invention has one end 51a of the first oily solid 51 covered by the second oily solid 52. The one end 51a of the first oily solid 51 is the end located closer to the bottom 6c of the bottomed mold 6 during production of the stick-shaped cosmetic 2, among both ends in the axial direction Z of the first oily solid 51. The axial direction Z of the first oily solid 51 refers to the longitudinal direction of the first oily solid 51 when the first oily solid 51 is stick-shaped, and refers to the height direction of the first oily solid 51 when the first oily solid 51 is block-shaped. The other end 51b of the first oily solid 51 in the axial direction Z may or may not be covered by the second oily solid 52. In the stick-shaped cosmetic 2 shown in Figs. 1 and 10, 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 on the surface of the stick-shaped cosmetic 2.

A first preferred embodiment of the method for producing an oily solid material according to the present invention will be described below with reference to Fig. 2, taking as an example the case of producing a stick-shaped cosmetic material 2 shown in Fig. 1. In the production method shown in Fig. 2, the stick-shaped cosmetic material 2 shown in Fig. 1 is produced in an inverted state with the top and bottom turned upside down. In Figs. 1 and 10, the tip end of the stick-shaped cosmetic material 2 in the axial direction Z at the end where the second oily solid material 52 covers the first oily solid material 51 has an inclined surface inclined with respect to the axial direction Z of the first oily solid material 51, whereas in Fig. 2, the stick-shaped cosmetic material 2 and the members for producing it are shown in a simplified manner, and for convenience, the inclined surface is shown as a surface perpendicular to the axial direction Z of the stick-shaped cosmetic material 2. The axial direction Z of the stick-shaped cosmetic material 2 is the same as the axial direction Z of the first oily solid material 51, and is represented by the same reference numeral.
The mold 6 is configured to include two split molds 6a, 6b that can be combined and separated, and when combined, forms a bottomed cylindrical 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 positioned in the insertion direction Z1 (downward) of the core 7 described below, and the opening 6d is positioned upward. The opening 6d is an insertion port for the core 7, and forms a filling port for the second oily solid material 52.

The method for producing an oily solid material according to the first embodiment includes, in this order, (1) a setting step, (2) a first filling step, (3) a core removal step, (4) a second filling step, and (5) a mold removal step.
(1) Installation Step In the installation step, first, the core 7 is inserted into the bottomed mold 6 through the opening 6d, and the core 7 is installed so that the core 7 is not in contact with the mold 6 (see FIG. 2(a)). When the core 7 is installed in the mold 6, at least the tip end 71 of the core 7 in the insertion direction Z1 into the mold 6 is not in contact with the mold 6. It is also preferable that the part of the core 7 that is buried in the second oily solid 52 in the first filling step described later is not in contact with the mold 6. There is no particular limitation on the method of installing the core 7 so that the core 7 is not in contact with the mold 6. For example, the core 7 may be placed in the mold 6 with its base end supported by a support by gripping, screwing, engaging, or the like, to thereby place the core 7 in the mold 6 so that the core 7 is not in contact with the mold 6.

The core 7 used in the first embodiment has a communication passage 73 that connects the opening 71a of the tip 71 in the insertion direction Z1 into the mold 6 to the opening 72a on the base end side. The communication passage 73 extends in the same direction as the insertion direction Z1 in which the core 7 is inserted into the mold 6. In the first embodiment, the core 7 is a rod-shaped body, and both the core 7 and the communication passage 73 extend in a direction parallel to the insertion direction Z1 of the core 7. The opening 72a on the base end side is formed in a position that is not buried in the molten second oily solid 52 when the mold 6 is filled with the second oily solid 52.

(2) First Filling Step Next, the first filling step is performed. In the first filling step, the molten second oily solid material 52 is filled into the mold 6 from the opening 6d (see FIG. 2(b)). When the molten second oily solid material 52 is filled into the mold 6, the communication passage 73 is closed in a state in which a space 73a remains in a part of the communication passage 73. By closing the communication passage 73, it is possible to prevent the second oily solid material 52 from entering the communication passage 73 when filling the mold 6 with the second oily solid material 52. In the first embodiment, the communication passage 73 is closed by closing the opening 72a on the base end side with the plug member 8.

The plug member 8 has a base end blocking portion 81 as a portion that blocks the communication passage 73. The base end blocking portion 81 is detachably attached to the opening 72a on the base end side to block the opening 72a. The plug member 8 may close the opening 72a of the communication passage 73 by overlapping the base end blocking portion 81 or the like on the outside of the opening 72a. The base end blocking portion 81 has a size that can close the opening 72a of the communication passage 73. It is preferable that the core 7 or the die 6 can fix the plug member 8 in a state in which the communication passage 73 is closed by any method such as screwing, engaging, fitting, or pressing.
The plug member 8 used in the first embodiment includes a communicating passage insert portion 82 to be inserted into the communicating passage 73. As shown in FIG. 11(a) showing the cross section along line A-A in FIG. 2(a), the communicating passage insert portion 82 is disposed in the communicating passage 73 and is capable of reducing the volume of the communicating passage 73. The communicating passage insert portion 82 may be integrally molded with the base end blocking portion 81, or may be manufactured separately and connected to the base end blocking portion 81 by any means such as fusion, adhesive, screwing, engagement, or fitting. In this embodiment, the plug member 8 is of a length that does not block the opening 71a of the distal end portion 71 in the attached state where the opening 72a is blocked, as shown in FIG. 11(b) showing the cross section along line B-B in FIG. 2(a).

In the first embodiment, the opening 72a on the base end side is closed by the base end closing part 81, and the part 82 inserted into the communicating passage is disposed in the communicating passage 73 to reduce the volume of the communicating passage 73. The molten second oily solid material 52 is then filled into the mold 6. The tip end of the filled second oily solid material 52 in the insertion direction Z1 becomes one end 52a of the second oily solid material 52 in the stick-shaped cosmetic material 2. The base end of the filled second oily solid material 52 in the insertion direction Z1 becomes the other end 52b of the second oily solid material 52 in the stick-shaped cosmetic material 2. Here, since the communicating passage 73 of the core 7 is airtightly closed (tightly plugged) by the plug member 8, the molten second oily solid material 52 hardly flows into the communicating passage 73 in the core 7 through the opening 71a.
After the filled second oily solid material 52 has solidified, a core removal step is carried out.

In the core removal process, first, the blocked state of the communication passage 73 is released (see FIG. 2(c)). In the first embodiment, the plug member 8 is partially or completely removed from the communication passage 73 to release the blocked state of the communication passage 73.
Next, the core 7 is pulled out from the mold 6 (see FIG. 2(d)). Prior to pulling out the core 7, the closed state of the communication passage 73 is released, so that when the core 7 is pulled out, air flows into the space 9 surrounded by the core 7 and the second oily solid material 52 via the communication passage 73, thereby preventing the pressure in the space 9 from being reduced. After the core 7 is pulled out from the mold 6, the second filling step is carried out.

(4) Second filling step In the second filling step, the molten first oily solid material 51 is filled into the recess 9A of the second oily solid material 52 obtained by removing the core 7 (see FIG. 2(e)). One end 51a on the tip side in the Z1 direction of the filled first oily solid material 51 becomes one end 51a of the first oily solid material 51 in the stick-shaped cosmetic material 2. Also, an end 51b on the base end side in the Z1 direction of the filled first oily solid material 51 becomes the other end 51b of the first oily solid material 51 in the stick-shaped cosmetic material 2. In the first embodiment, the first oily solid material 51 is filled so that the first oily solid material 51 covers the surface of the other end 52b side of the second oily solid material 52. After the filled first oily solid material 51 has solidified and one end 51a of the first oily solid material 51 is covered with the second oily solid material 52 to form a solidified body 200, a mold removal step is performed.
(5) 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 (see FIG. 2(f)). After carrying out the above steps with the split molds 6a, 6b in a combined state, the two split molds 6a, 6b are separated, allowing the solidified body 200 to be easily removed. The solidified body 200 may be in a semi-solidified state with some internal portions where the first oily solid material 51 is not completely solidified, and in that case, the stick-shaped cosmetic material 2 is completed when the internal portions are also completely solidified.

According to the manufacturing method of the first embodiment, it is possible to manufacture a stick-shaped cosmetic material 2 consisting of a first oily solid material 51 and a second oily solid material 52, with one end 51a of the first oily solid material 51 covered by the second oily solid material 52, and it is also possible to prevent the second oily solid material 52 covering the first oily solid material 51 from having defects such as sunken portions.
That is, according to the manufacturing method of the first embodiment, when the molten second oily solid material 52 is filled into the mold 6, the communication passage 73 is closed in a state in which a space 73a remains in a part of the communication passage 73, and the closed state of the communication passage 73 is released before the core 7 is pulled out, so that when the core 7 is pulled out, air flows into the space 9 formed between the core 7 and the second oily solid material 52 through the communication passage 73, making it difficult to reduce the pressure in the space 9. Since it is difficult to reduce the pressure in the space 9, the second oily solid material 52 surrounding the space 9 is pulled toward the space 9, and it is possible to prevent the second oily solid material 52 from collapsing or collapsing. In the first embodiment, when the core 7 is placed in the mold 6 before the molten second oily solid material 52 is filled, the connecting passage 73 is closed with the plug member 8 in a state in which a part of the connecting passage 73 remains space. However, the connecting passage 73 may be closed at any stage before the core 7 is placed in the mold 6, after the core 7 is placed in the mold 6, or during the process of placing the core 7 in the mold 6.

Due to the effect that the space 9 is difficult to reduce in pressure, according to the manufacturing method of the first embodiment, a stick-shaped cosmetic 2 in which one end of the first oily solid 51 is covered with the second oily solid 52, and the second oily solid has no defects such as depressions, can be efficiently manufactured. In addition, the second oily solid 52 can be manufactured even if it is soft or thin, and it is 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. In addition, since the outermost layer of the stick-shaped cosmetic 2 does not collapse and a beautiful surface without defects is formed, it is also possible to manufacture a stick-shaped cosmetic having a surface shape as designed, even if the tip of the second oily solid 52 is decorated.

Further explaining the stick-shaped cosmetic material 2 shown in FIG. 1 and FIG. 10, which is a specific example of a stick-shaped cosmetic material produced by the first embodiment, the stick-shaped cosmetic material 2 has a substantially cylindrical rod shape. The first oily solid material 51 in the stick-shaped cosmetic material 2 has an axis Y. The first oily solid material 51 has a small diameter portion 51c that serves as an axis portion extending in the axial direction Z, and a substantially disk-shaped disk portion 51d. In this embodiment, the small diameter portion 51c has a substantially cylindrical shape. One end of the small diameter portion 51c is one end 51a of the first oily solid material 51 covered by the second oily solid material 52. At least a portion of the small diameter portion 51c is covered by the second oily solid material 52. In this embodiment, the entire small diameter portion 51c is covered by the second oily solid material 52. The disk portion 51d is disposed on the opposite side of the end 51a of the first oily solid 51, and has a larger cross-sectional area when cut along a plane perpendicular to the axis Y than the small diameter portion 51c. A part of the disk portion 51d is not covered by the second oily solid 52, and the side and bottom surfaces of the disk portion 51d are exposed. The bottom surface of the disk portion 51d is the other end 51b of the first oily solid 51. In other words, the small diameter portion 51c constitutes an axis portion that continues from the end 51a and extends in the axial direction Z. The axis Y is the axial center line of the first oily solid 51. The axis Y is an axis that is located on the same axis as the axis of the outer cylinder 30 described later.

In the first filling step, when the molten second oily solid material 52 is filled into the mold 6, depending on the shape and size of the communication passage 73 of the core 7, the air in the communication passage 73 may be heated and discharged from the opening 71a of the unblocked tip 71. When air is discharged from the opening 71a of the tip 71, the filled second oily solid material 52 may be deformed or air bubbles may be mixed into the second oily solid material 52.
In contrast to this, in the first embodiment, the plug member 8 is provided with an insertion portion 82 into the communicating passage, which reduces the volume inside the communicating passage 73 and decreases the amount of air discharged from the communicating passage 73. This makes it possible to prevent the filled second oily solid matter 52 from deforming, and therefore makes it easier to manufacture a defect-free stick-shaped cosmetic material 2 without having to worry about the processing accuracy, shape, or size of the communicating passage 73.

When the installation step is performed before the first filling step and the core 7 is installed in the mold 6, the installation of the core 7 is easy. In addition, there is no need to manage the temperature or hardness of the second oily solid 52 in the mold 6 at the timing of installing the core 7.

A first modification of the first embodiment will be described with reference to FIG.
2, the core 7 is inserted in advance into the bottomed mold 6 from the opening 6d, and the molten second oily solid material 52 is filled into the mold 6 in a state in which the core 7 is not in contact with the mold 6. In contrast, in the manufacturing method of the oily solid material of the present modified example 1, the core 7 is placed after the second oily solid material 52 is filled.
That is, the first filling step (FIG. 3(a)) is followed by the setting step (FIG. 3(b)).
The steps from the core removal step (FIGS. 3(c) and 3(d)) to the mold removal step (FIG. 3(f)) are the same as those described in the manufacturing method of FIG. 2 above. Also, the configuration of the core 7 uses the core 7 described in the manufacturing method of FIG. 2 above. Therefore, the differences from the manufacturing method of FIG. 2 will mainly be described here.

In the first filling step, the mold 6 is filled with a necessary amount of the molten second oily solid material 52. The necessary amount to be filled is preferably an amount that allows the second oily solid material 52 to spread over a predetermined range of the inner surface of the mold 6 when the core 7 is immersed in the second oily solid material 52 filled in the mold 6 and placed in the mold 6, and is also preferably an amount that does not cause the second oily solid material 52 to overflow from the opening 6d of the mold 6. The amount that spreads over a predetermined range of the inner surface of the mold 6 may be an amount that does not fill the entire volume of the internal space of the mold 6, and may be, for example, about 1/5 to 4/5 of the entire volume of the internal space of the mold 6.
In the installation process, the core 7 is inserted from the opening 6d in the insertion direction Z1 and submerged in the second oily solid 61 filled in the mold 6, and is installed so that the tip 71 buried in the second oily solid 61 is not in contact with the mold 6.
The opening 72a is formed at a position where it will not be buried in the second oily solid material 52 when the mold 6 is filled with the molten second oily solid material 52 and the core 7 is placed in the mold 6. The opening 72a is closed, for example, with a plug member 8 in a state where a space is left in a part of the communication passage 73 before the core 7 is placed in the mold 6 after the molten second oily solid material 52 is filled.
The blocked state of the communication passage 73 is released by pulling out the plug member 8 partially or completely from the communication passage 73 of the core 7 before pulling out the core 7 .
Then, in a core removal step, the core 7 is removed from the second oily solid material 52, and in a second filling step, the molten first oily solid material 51 is filled into the recess 9A of the second oily solid material 52. After filling, the filled first oily solid material 51 solidifies, and a solidified body 200 is formed in which one end 51a of the first oily solid material 51 is covered with the second oily solid material 52, and then a mold removal step is performed. In the mold removal step, the two split molds 6a, 6b are separated, so that the solidified body 200 can be easily removed. When the solidified body 200 has completely solidified, the stick-shaped cosmetic material 2 is completed.

3, when the core 7 is placed in the mold 6 filled with the molten second oily solid material 52, the communicating passage 73 is closed in a state in which a space 73a remains in part of the communicating passage 73, and the closed state of the communicating passage 73 is released prior to pulling out the core 7. This makes it difficult for the pressure inside the space 9 to be reduced, and prevents the second oily solid material 52 surrounding the space 9 from being pulled toward the space 9, causing the second oily solid material 52 to collapse or collapse. This makes it possible to efficiently produce an oily solid material without defects in the second oily solid material that forms the outer layer of the stick-shaped cosmetic material 2.
In addition, since the core 7 is placed in the mold 6 after the first filling step, there is no need to avoid the core 7 when filling the second oily solid material 52, and filling can be easily performed.
When attempting to fill the second oily solid material 52 into the mold 6 after placing the core 7 in the mold 6 through the opening 6d, filling through the opening 6d may be difficult or inefficient depending on the shape and size of the core, so it is also possible to form a filling port in the mold 6. If the core 7 is placed in the mold 6 so as to be submerged in the second oily solid material 52 after the second oily solid material 52 has been filled into the mold 6, the opening 6d can be easily used as both the insertion port of the core 7 and the filling port of the second oily solid material 52, which makes it easy to simplify the mold, etc.

A second modified example of the first embodiment will be described. In the manufacturing method of the oily solid material of the second modified example, a step of installing the core 7 is carried out simultaneously with a first filling step of filling the second oily solid material 52. The first filling step and the installing step are carried out simultaneously not only in the cases where the filling start and the installing start are carried out simultaneously, the filling end and the installing end are carried out simultaneously, or the first filling step and the installing step are carried out simultaneously from start to finish, but also in the cases where a part of the installing step of the core 7 and a part of the filling step of the second oily solid material 52 are carried out overlapping with each other.
When the installation step of installing the core 7 is carried out simultaneously with the first filling step, the time required for the process is shortened, and the production of the stick-shaped cosmetic material 2, which is an oily solid, can be expedited.
Furthermore, the temperature and hardness of the second oily solid material 52 in the mold 6 can be easily controlled at the timing of installing the core 7. When the filling of the second oily solid material 52 into the mold 6 and the installation of the core 7 are performed through the opening 6d, if it is expected that the two operations will interfere with each other, a filling port for filling the second oily solid material 52 into the mold 6 may be provided separately in the mold 6, in addition to the opening 6d which serves as the insertion port for the core 7. In this case, although the structure of the mold becomes complicated, there is an advantage that the operation time can be shortened.

In this way, when there is an installation process of inserting core 7 into the mold 6 and installing core 7 so that core 7 is not in contact with the mold 6 before or after the first filling process, or simultaneously with the first filling process, there are the following common advantages.
Since the flat surface of the inner surface of the second oily solid 52 (the outer surface of the first oily solid 51) can be formed as desired, the shape of the inner surface of the second oily solid 52 (the outer surface of the first oily solid 51) can be easily controlled. Also, the boundary between the first oily solid 51 and the second oily solid 52 can be clearly defined. Furthermore, since the thickness of the second oily solid 52 can be easily made thinner or thicker, the thickness can be made more uniform and easier to control. As a result, this leads to stable production and quality.

When the installation step of installing the core 7 is performed after the first filling step or simultaneously with the first filling step, the following common advantages are obtained.
For example, even if the gap Ca (see FIG. 2(a)) between the tip 71 of the core 7 and the bottom 6c of the mold 6 is small, as shown in FIG. 3(a), the second oily solid material 52 is already filled in the mold 6, so that it is easy to fill this gap Ca with the second oily solid material 52. Similarly, even if the gap Cb (see FIG. 2(a)) between the outer peripheral surface of the core 7 and the inner peripheral surface 6e of the internal space of the mold 6 is small, the second oily solid material 52 is already filled in the mold 6, so that it is easy to fill this gap Cb with the second oily solid material 52.

In other words, the thickness of one end 52a at the tip side of the second oily solid matter 52 or the thickness of a side portion 52e (see FIG. 2(f)) of the second oily solid matter 52 located in the axis-perpendicular direction X of the first oily solid matter 51 can be freely changed to be thicker or thinner without worrying about defects caused by insufficient filling of the gaps Ca, Cb with the second oily solid matter 52. The axis-perpendicular direction X here is the direction perpendicular to the axial direction Z.
That is, it is sufficient that the second oily solid material 52 fills at least the gap Ca between the tip 71 of the core 7 and the bottom 6c of the mold 6. To achieve this, it is not necessary to fill the entire amount of the second oily solid material 52 required to produce the stick-shaped cosmetic material 2 into the mold 6 at once, and for example, a multi-stage filling (filling multiple times) may be performed in which only an amount of the second oily solid material 52 that allows the gap Ca to be filled into the mold 6 first, and after the core 7 is placed, the remaining second oily solid material 52 is filled into the mold 6.
Furthermore, the core 7 may be temporarily placed away from the bottom 6c so that the gap Ca between the tip 71 of the core 7 and the bottom 6c of the mold is slightly larger than a predetermined value [corresponding to the thickness T2 of the end 52a] determined in advance by design. In this state, after the second oily solid matter 52 is filled into the mold 6, the core 7 may be moved toward the bottom 6c before the second oily solid matter 52 hardens so that the gap Ca is spread throughout the gap Ca, thereby reducing the gap Ca to a predetermined value.
Alternatively, the gap Cb between the outer peripheral surface of the core 7 and the inner peripheral surface 6e of the mold 6 may be similarly reduced by further moving the core 7 in the direction perpendicular to the axis X after filling with the second oily solid 52.

Next, the second and third embodiments of the present invention will be described with reference to Figs. 4 and 5. Regarding the second and third embodiments, differences from the first embodiment will be described. Points that are not specifically described are the same as those in the first embodiment, and the description of the first embodiment will be applied as appropriate.

In the second embodiment, as shown in FIG. 4( a ), the communication passage 73 is closed by closing the opening 71 a of the tip portion 71 with a plug member 8 .
In the second embodiment, the plug member 8 does not include a base end blocking portion 81, but includes a tip end blocking portion 83 at the tip of the communicating passage insertion portion 82. The tip end blocking portion 83 is capable of blocking the opening 71a of the tip portion 71. In the second embodiment, as shown in Fig. 11(a), which shows the cross section taken along line A-A in Fig. 2(a) and the cross section taken along line C-C in Fig. 4(a), the communicating passage insertion portion 82 is disposed in the communicating passage 73 to reduce the volume of the communicating passage 73, and the tip end blocking portion 83 blocks the opening 71a of the tip portion 71.
The molten second oily solid material 52 is then filled into the mold 6 (see FIG. 4(b)). Thereafter, the core removal step, the second filling step, and the mold removal step are carried out in the same manner as in the first embodiment, to produce the stick-shaped cosmetic material 2.

In the second embodiment, the plug member 8 is provided with a tip-side blocking portion 83, which can block the opening 71a of the tip 71, and therefore can more reliably prevent air from being discharged from the opening 71a of the tip 71 when the second oily solid material 52 melted in the first filling step is filled into the mold 6. Therefore, according to the manufacturing method of the second embodiment, a defect-free stick-shaped cosmetic material 2 can be more easily manufactured.

In the second embodiment, when the plug member 8 is pulled out, as shown in Fig. 11(c) which shows the cross section along line D-D in Fig. 4(c), it is considered that the space 9a surrounded by the front end closing portion 83 of the plug member 8, the front end portion 71 of the core 7, and the second oily solid matter 52 will be depressurized. However, since the degree to which the space 9a is depressurized when the plug member 8 is pulled out is small compared to the conventional manufacturing method, the second oily solid matter 52 is unlikely to collapse or collapse.
From the viewpoint of weakening the degree of reduced pressure in the space 9a, it is preferable that T1/T2, which is the ratio of the thickness T1 of the tip portion 71 to the thickness T2 of the tip portion of the second oily solid 52, is small, for example, preferably 10 or less, and more preferably 5 or less. There is no particular lower limit, but from the viewpoint of ease of fabrication of the core, it is, for example, 0.01 or more, and preferably 0.05 or more. From the viewpoint of weakening the degree of reduced pressure in the space 9a and ease of fabrication of the core, T1/T2 is preferably 0.01 or more and 10 or less, and more preferably 0.05 or more and 5 or less.

In the second embodiment, as shown in FIG. 4(a), when the opening 71a of the tip 71 of the core 7 is blocked by the tip blocking portion 83 of the plug member 8, the insertion portion 82 in the communication passage is disposed in the communication passage 73. If the communication passage 73 is completely blocked when the insertion portion 82 in the communication passage is disposed in the communication passage 73, the space 9a surrounded by the plug member 8, the tip 71 of the core 7, and the second oily solid 52 is depressurized when the plug member 8 is pulled out, and there is a risk of defects occurring in the second oily solid 52. In order to prevent the space 9a from being depressurized and to prevent defects from occurring in the second oily solid 52 when the plug member 8 is pulled out, it is preferable that there is a space in part of the communication passage 73 when the plug member 8 is used to block the communication passage 73.

In the method for producing an oily solid material of the present invention, as described above, the communication passage 73 may be blocked by blocking either the opening 72a on the base end side or the opening 71a of the tip portion 71, or, as described below, may be blocked by blocking an intermediate portion of the communication passage 73. From the viewpoint of ease of blocking the communication passage 73, it is preferable to block the opening 72a on the base end side, and from the viewpoint of more reliably preventing air from being discharged from the opening 71a of the tip portion 71, it is preferable to block the opening 71a of the tip portion 71.
In the method for producing an oily solid material of the present invention, by closing at least one of the opening 72a on the base end side and the opening 71a at the tip end 71 with a plug member 8, a stick-shaped cosmetic material 2 without defects can be produced more easily.

In the third embodiment, as shown in FIG. 5, the communication passage 73 is closed by closing an intermediate portion 74 of the communication passage 73 with a plug member 8. In the third embodiment, as shown in FIG.
In the third embodiment, similarly to the second embodiment, the plug member 8 does not include a base end blocking portion 81, but includes a tip end blocking portion 83 at the tip of the communicating passage insertion portion 82. In the third embodiment, the tip end blocking portion 83 is capable of blocking an intermediate portion 74 of the communicating passage 73. The intermediate portion 74 refers to a portion of the communicating passage 73 between the opening 71a on the tip end side and the opening 72a on the base end side. In the third embodiment, the tip end blocking portion 83 blocks the intermediate portion 74 of the communicating passage 73.
The molten second oily solid material 52 is then filled into the mold 6 (see FIG. 5(b)). Thereafter, the core removal step, the second filling step, and the mold removal step are carried out in the same manner as in the first embodiment, to produce the stick-shaped cosmetic material 2.

In the third embodiment, the tip-side blocking portion 83 of the plug member 8 has an outer diameter smaller than the inner diameter of the communication passage 73, and when the intermediate portion 74 is blocked by the tip-side blocking portion 83, a gap is formed between the outer peripheral surface of the tip-side blocking portion 83 and the inner peripheral surface of the communication passage 73 (see Figs. 5(a) and (b)). Therefore, when the blocking of the intermediate portion 74 by the tip-side blocking portion 83 is released, the space 73a in the communication passage 73 communicates with the opening 71a on the tip portion 71 side through the gap. Therefore, when the blocking of the intermediate portion 74 is released and the plug member 8 is pulled out of the communication passage 73, the space 9a surrounded by the tip-side blocking portion 83 of the plug member 8, the tip portion 71 of the core 7, and the second oily solid material 52 is not depressurized, so that the second oily solid material 52 can be prevented from being defective. The tip blocking portion 83 may have a portion on its outer periphery that contacts the inner periphery of the communication passage 73 and a portion that does not contact the inner periphery of the communication passage 73.

If the outer diameter of the tip-side blocking portion 83 of the plug member 8 and the inner diameter of the communication passage 73 are approximately the same, and the outer peripheral surface of the tip-side blocking portion 83 and the inner peripheral surface of the communication passage 73 are in close contact when the middle portion 74 is blocked by the tip-side blocking portion 83, when the plug member 8 is pulled out to release the blockage of the middle portion 74, the space 73a in the communication passage 73 and the opening 71a on the tip portion 71 side do not communicate, so the space 9a is decompressed, and there is a possibility that a defect will occur in the second oily solid 52. However, even if the outer peripheral surface of the tip-side blocking portion 83 and the inner peripheral surface of the communication passage 73 are in close contact as described above, the communication passage 73 is closed in a state where a space 73a remains in a part of the communication passage 73, so the degree of close contact between the outer peripheral surface of the plug member 8 and the inner peripheral surface of the communication passage 73 can be reduced compared to when the communication passage 73 is closed in a state where no space 73a exists in the communication passage 73. Therefore, when the plug member 8 is pulled out, the space 9a is hardly depressurized or is only slightly depressurized, so there is little risk of the second oily solid 52 collapsing or collapsing.

In the second and third embodiments, similar to the first and second variations of the first embodiment, the core 7 may be inserted into the mold 6 after the first filling step or simultaneously with the first filling step in the installation step, and the core 7 may be installed so as to be in a non-contact state with the mold 6. Even in this case, the same effects as those of the first and second variations of the first embodiment can be achieved.

A preferred configuration common to the first to third embodiments will now be described.
In the first to third embodiments, as described above, the space 9 can be prevented from being depressurized when the core 7 is pulled out from the second oily solid 52. Even in the conventional manufacturing method, when the portion of the core buried in the second oily solid is short and the distance to pull out the core is short, the degree of depressurization of the space between the core and the second oily solid is small, so that defects may not occur in the second oily solid depending on the hardness and thickness of the second oily solid. According to the manufacturing method of the present invention, even when the portion of the core buried in the second oily solid is short and the distance to pull out the core is short, defects can be prevented from occurring in the second oily solid. However, in order to achieve the effect of the present invention more significantly, it is preferable that the portion of the core buried in the second oily solid is long and the distance to pull out the core is long. Moreover, the effect of the present invention is more significantly achieved when the thickness of the second oily solid 52 is thin.

In an embodiment, the length L2 of the portion of the core 7 buried in the second oily solid 52 can be regarded as being the same dimension as the small diameter portion 51c serving as the shaft portion of the first oily solid 51. For this reason, the ratio L2/L1 of the length L2 of the portion of the core 7 buried in the second oily solid 52 (the length of the small diameter portion 51c) to the length L1 of the filled second oily solid 52 in the insertion direction Z is preferably 0.1 or more, more preferably 0.3 or more, from the viewpoint of more significantly achieving the effects of the present invention, is preferably 0.99 or less, more preferably 0.95 or less, from the viewpoint of uniformly filling the entire interior of the mold 6 with the molten second oily solid 52, and is preferably 0.1 or more and 0.99 or less, more preferably 0.3 or more and 0.95 or less, from the viewpoint of achieving both.
The ratio T2/L3 of the thickness T2 of the tip of the second oily solid material 52 to the length L3 in the axial direction of the stick-shaped cosmetic material 2 is preferably 0.01 or more, and more preferably 0.03 or more, from the viewpoint of achieving the effects of the present invention more significantly, and is preferably 0.99 or less, and more preferably 0.95 or less, from the viewpoint of uniformly filling the entire interior of the mold 6 with the molten second oily solid material 52, and is preferably 0.01 or more and 0.99 or less, and more preferably 0.03 or more and 0.95 or less, from the viewpoint of achieving both. Furthermore, the T2/L3 can also be preferably 0.1 or more, and more preferably 0.3 or more, or can also be preferably 0.1 or more and 0.99 or less, and more preferably 0.3 or more and 0.95 or less.

The minimum thickness of the second oily solid 52 in the region on the axial tip side of the stick-shaped cosmetic 2, in other words, the shortest distance from the surface of the second oily solid 52 to the surface of the first oily solid 51, is, from the viewpoint of more significantly achieving the effects of the present invention, preferably 0.5 mm or more, more preferably 1 mm or more, and also preferably 30 mm or less, more preferably 10 mm or less, and also preferably 0.5 mm or more and 30 mm or less, and more preferably 1 mm or more and 10 mm or less.
The region at the tip end in the axial direction of the stick-shaped cosmetic material 2 is the two regions at the tip end when the stick-shaped cosmetic material 2 is divided into three regions by equally dividing its axial length L3 into thirds.

The manufacturing methods of the first to third embodiments may have a cooling step. The cooling step includes a cooling step of forcibly cooling the second oily solid material 52 after the first filling step or the setting step to promote solidification of the second oily solid material 52, and a cooling step of forcibly cooling the first oily solid material 51 after the second filling step to promote solidification of the first oily solid material 51. The manufacturing methods of the first to third embodiments may have either one or both of the above-mentioned two cooling steps. In the cooling step, means for forcibly cooling the first or second oily solid material 51, 52 include placing the mold 6 filled with the first or second oily solid material 51, 52 in a low-temperature space, applying cold air to the first or second oily solid material 51, 52, applying cold air, cold water or a cooling plate to the mold 6 filled with the first or second oily solid material 51, 52, etc. The cooling process is preferably carried out after the first filling process and before the mold 6 is removed from the solidified body 200. The cooling process of the second oily solid 52 may be carried out between the first filling process and the core removal process, or between the core removal process and the second filling process.

The manufacturing methods of the first to third embodiments preferably include a cooling step, from the viewpoint of accelerating the solidification of the first or second oily solid material 51, 52, preventing the first or second oily solid material 51, 52 from collapsing or collapsing and causing defects in the first or second oily solid material 51, 52, and making it possible to easily manufacture a stick-shaped cosmetic material 2 without defects.

The manufacturing methods of the first to third embodiments may also include a flattening step. The flattening step includes a flattening step of removing a part of the other end 52b of the solidified second oily solid 52 after the core removal step to flatten it, and a flattening step of removing a part of the other end 51b of the solidified first oily solid 51 after the second filling step to flatten it. The other ends 51b, 52b of the solidified first and second oily solids 51, 52 are the surfaces (upper surfaces) of the solidified first and second oily solids 51, 52 opposite the bottom 6c of the mold 6, as shown in FIG. 2(f).

The manufacturing method of the first to third embodiments may have either one or both of the above-mentioned two flattening steps. In the flattening step, the means for removing a part of the other end 51b, 52b side of the solidified first or second oily solid 51, 52 to flatten it may include scraping off a part of the other end 51b, 52b side of the first or second oily solid 51, 52 with a spatula or blade, dissolving a part of the other end 51b, 52b side of the first or second oily solid 51, 52 by reheating, and a combination of these means.
The flattening step is preferably performed to remove unevenness when the other end 51b, 52b of the first or second oily solid 51, 52 solidified after the first or second filling step has unevenness. When the other end 51b, 52b of the first or second oily solid 51, 52 has unevenness, the flattening step can flatten the other end 51b, 52b by removing the uneven portion including the convex portion and the concave portion, or only the convex portion. In the present invention, the flattening step may or may not be performed.

The manufacturing methods of the first to third embodiments preferably include a flattening process from the viewpoint of controlling the shape of the boundary between the first oily solid 51 and the second oily solid 52.

It is preferable that the core 7 has a shape that does not require forcible removal when it is pulled out from the second oily solid 52. It is preferable that the core 7 has a constant cross-sectional contour shape (a cross-section cut along a plane perpendicular to the axial direction Z) along the axial direction Z (see FIG. 2), or has a uniform outer shape portion 76 with a constant contour shape and a tapered tip portion 75 (see FIG. 7(a)). The core 7 may also have a shape in which the outer diameter gradually decreases toward the tip portion (see FIG. 7(b)).

From the viewpoint of easiness of blocking the communication passage 73, the base end opening 72a is preferably formed in the base end 72 of the core 7 in the insertion direction Z1. The mode in which the base end opening 72a is formed in the base end 72 includes a mode in which the opening 72a is formed in the end face on the base end side of the core 7 (see FIG. 2) and a mode in which the opening 72a is formed in the side face of the base end 72 (see FIG. 7(c)).

Materials for the mold 6 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 a mold 6 made of an elastomer is used, the mold 6 can be opened by applying negative pressure around the mold 6 in the mold removal process, and the mold 6 can be removed from the solidified body 200.

Materials constituting the core 7 include metals, synthetic resins, ceramics, 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 metals, synthetic resins, synthetic rubber, and silicone rubber from the viewpoints of heat resistance, durability, releasability of oily solids, and processability.

Materials constituting the plug member 8 include metals, synthetic resins, ceramics, 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 metals, synthetic resins, synthetic rubber, and silicone rubber from the viewpoints of airtightness, heat resistance, durability, releasability of oily solids, and processability.

The constituent materials of the first and second oily solid materials 51, 52 will be described.
As the constituent materials of the first and second oily solids 51 and 52, various materials that have been conventionally used can be used without particular limitation depending on the purpose of the oily solids. 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 mean that they are different in at least one of various properties and effects such as color tone, taste, fragrance, hardness, volatility, UV protection effect, moisturizing effect, and sustained effect of the coating film, and among them, 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, but from the viewpoint of improving the design of the stick-shaped cosmetic material 2, it is preferable that they have different color tones. 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 other methods can be used.

Examples of embodiments in which the first oily solid 51 and the second oily solid 52 are different in characteristics 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 user can enjoy the change in scent 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 and second oily solids 51, 52, a powder such as a pigment is dispersed in a cosmetic material in which the continuous layer is preferably an oil agent, 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 and second oily solid materials 51, 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 first oily solid material 51 and the second oily solid material 52 to have different compositions.
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, and more preferably 0.2% by mass or more and 45% by mass or less.

The stick-shaped cosmetic material 2 produced by the manufacturing method of the present invention can be attached to a cosmetic material container 3 and used as described above. Regarding the cosmetic material container 3 shown in Figures 1 and 10, the cosmetic material 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 cosmetic material 2, a lifting mechanism 20 for the inner plate 10, and an outer cylinder 30 for storing the inner plate 10. The lifting mechanism 20 for the inner plate 10 is connected to the bottom 12 of the inner plate 10. In addition, the bottom 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 cosmetic material 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. 10.

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 screw 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 screw 23a. This male screw 23a is adapted to screw into the female screw 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 between the male screw 23a and the female screw. 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 (see FIG. 1) 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 third embodiments, a stick-shaped cosmetic material 2 is produced, but the oily solid material 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 and second oily solid materials 51, 52, any appropriate material can be used depending on the oily solid material to be produced.

In the first to third embodiments, the communication passage 73 of the core 7 extends parallel to the insertion direction Z1, but may extend at an angle to the insertion direction Z1. The communication passage 73 does not necessarily have to be linear, and may be curved or spiral.
In the manufacturing method of the present invention, the communication passage 73 may be closed by closing both the opening 72a on the base end side and the opening 71a of the tip end portion 71 (see FIG. 6).
In the first to third embodiments, the plug member 8 has the communicating passage insertion portion 82, but the plug member 8 does not necessarily have to have the communicating passage insertion portion 82.

In addition, the base end opening 72a does not necessarily need to be formed above the other end 52b of the second oily solid material 52 in the axial direction Z, but may be formed at a position where it is not buried in the second oily solid material 52 when the core 7 is placed in the molten second oily solid material 52. For example, as shown in Fig. 7(d), the base end opening 72a may be formed below the other end 52b of the filled second oily solid material 52 in the insertion direction Z.
In the first to third embodiments, the first oily solid matter 51 in the produced stick-shaped cosmetic material 2 has a small diameter portion 51c and a disk portion 51d, but the shape of the first oily solid matter 51 is not limited to this. For example, the first oily solid matter 51 does not have to have the disk portion 51d.
Furthermore, in the first to third embodiments, the produced stick-shaped cosmetic preparation 2 has a substantially cylindrical shape, but the shape of the oily solid material produced by the production method of the present invention is not particularly limited, and in addition to a substantially cylindrical shape, it may be a substantially prismatic shape, a substantially polygonal pyramid shape, a hemispherical shape, a spherical shape, or the like, and letters, logos, pictures, patterns, and the like may be arranged on the surface by using projections and recesses.

In the first to third embodiments, a stick-shaped cosmetic 2 having a two-layer structure in which the first oily solid 51 is covered with the second oily solid 52 is produced, but the production method of the present invention can also produce an oily solid having a multi-layer structure of three or more layers. With reference to FIG. 8, a method for producing a stick-shaped cosmetic 2A consisting of a first oily solid 51, a second oily solid 52, and a third oily solid 53 will be described. First, the first filling step, the setting step, and the core removal step are performed using a core 7 in the same manner as in the first to third embodiments. Next, another core 7A is inserted into the recess 9 of the second oily solid 52, and the core 7A is set so that the core 7A and the second oily solid 52 are not in contact with each other (see FIG. 8(a)). The other core 7A has the same structure as the core 7 used in the first to third embodiments. Next, the melted first oily solid 51 is filled into the recess 9 (see FIG. 8(b)). At this time, the communication passage 73 of the core 7A is closed in a state in which a space 73a remains in part of the communication passage 73. Next, the closed state of the communication passage 73 is released (see FIG. 8(c)), and then the core 7A is pulled out (see FIG. 8(d)). Next, the molten third oily solid material 53 is filled into the recess 9A of the first oily solid material 51 obtained by pulling out the core 7A (see FIG. 8(e)). Then, the mold 6 is removed from the solidified body 200A in which the third oily solid material 53 is covered by the first oily solid material 51, and the first oily solid material 51 is covered by the second oily solid material 52, thereby producing a three-layered stick-shaped cosmetic material 2A (see FIG. 8(f)).
As for not only the second oily solid matter 52 but also the first oily solid matter 51, similarly to the first and second modified examples of the first embodiment, after or simultaneously with filling the molten first oily solid matter 51 into the recess 9, a core 7A may be inserted into the recess 9 and disposed so as to be in a non-contact state with the second oily solid matter 52. Even in this case, the same effects as those of the first and second modified examples of the first embodiment can be achieved.

Further, in the first to third embodiments, one core 7 is used, but in the manufacturing method of the present invention, multiple cores 7 may be used. With reference to FIG. 9, a method for manufacturing a stick-shaped cosmetic material 2B using two cores 7B, 7C will be described. First, the two cores 7B, 7C are placed in the mold 6 so that they are not in contact with the mold 6 (see FIG. 9(a) and FIG. 12(a) showing the cross section of line E-E in FIG. 9(a)). Each of the two cores 7B, 7C has the same structure as the core 7 used in the first to third embodiments. Next, the mold 6 is filled with the molten second oily solid material 52 (see FIG. 9(b)). At this time, the communication passages 73 of the cores 7B, 7C are closed in a state in which a space 73a remains in a part of the communication passages 73. Next, the blocked state of the communication passages 73 of the cores 7B and 7C is released (see FIG. 9(c) and FIG. 12(b) showing a cross section along line F-F in FIG. 9(c)), and then the core 7B is pulled out (see FIG. 9(d)). Next, the molten first oily solid 51 is filled into the recess 9B of the second oily solid 52 obtained by pulling out the core 7B (see FIG. 9(e)). Also, the core 7C is pulled out (see FIG. 9(f)). Next, the molten third oily solid 53 is filled into the recess 9C of the second oily solid 52 obtained by pulling out the core 7C (see FIG. 9(g)). Then, the mold 6 is removed from the solidified body 200B in which the small diameter portion 51c which forms the shaft portion including one end 51a of the first oily solid material 51 and the shaft portion 53c which includes one end 53a of the third oily solid material 53 are covered with the second oily solid material 52, thereby producing a stick-shaped cosmetic material 2B (see Figure 9 (h)).
As in the first and second modified examples of the first embodiment, the cores 7B and 7C may be disposed after or simultaneously with filling the mold 6 with the molten second oily solid material 52 so as to be in a non-contact state with the mold 6. Even in this case, the same effects as those in the first and second modified examples of the first embodiment can be achieved.
9, a plurality of oily solids, i.e., the first oily solid 51 and the third oily solid 53 arranged alongside it, are formed inside the second oily solid 52, so that when the second oily solid 52 is consumed through use and the first oily solid 51 or the third oily solid 53 inside is exposed, or when the first oily solid 51 or the third oily solid 53 inside is visible through the second oily solid 52, the appearance and the design of the visible surface can be selectively designed, thereby enabling product differentiation and improved product value. For example, by making the color tone of the first oily solid 51 different from the color tone of the second oily solid 52 or the third oily solid 53, or the color tone of the second oily solid 52 and the third oily solid 53, it is possible to improve product differentiation, etc.

The inner peripheral surface of the die 6, the outer peripheral surface of the core 7, the peripheral surface of the communication passage 73, and the outer peripheral surface of the communication passage insertion portion 82 may each have a non-circular cross section, such as an ellipse or semicircle, a polygonal shape such as a triangle, a square, a pentagon, or a hexagon, or a polygon with rounded corners, instead of a circular cross section. The opening 71a at the tip of the communication passage 73 and the tip closing portion 83 may also have a non-circular cross section, such as an ellipse or semicircle, a polygonal shape such as a triangle, a square, a pentagon, or a hexagon, or a polygon with rounded corners, instead of a circular cross section. It is preferable that the opening 71a at the tip of the communication passage 73 and the tip closing portion 83 that closes the opening 71a have a circular or non-circular complementary cross section. It is also preferable that the tip surface of the tip closure portion 83, together with the tip surface of the core 7, form a continuous flat surface, concave curved surface, or convex curved surface.

In Fig. 13(a), the shape of the inner circumferential surface 6e of the mold 6 in a longitudinal section cut along the axial direction Z is semicircular on the bottom 6c side, and a core 7 is placed in this mold 6 to produce a stick-shaped cosmetic material 2, for example, by the manufacturing method of the first embodiment. If the shape of the bottom 6c side of the inner circumferential surface 6e is semicircular, one end 52a of the second oily solid material 52 in the stick-shaped cosmetic material 2 will have a tapered shape (hemispherical) as shown in Fig. 13(b).

Next, the stick-shaped cosmetic material 2, which is an oily solid, will be described in more detail.
The stick-shaped cosmetic 2 described in each embodiment and each modified example includes a first oily solid material 51 having an axis Y, and a second oily solid material 52 covering one end 51a of the first oily solid material 51 and at least a part of the shaft portion. The one end 51a of the first oily solid material 51 is the free end of both ends in the axial direction Z that is the side where the stick-shaped cosmetic material 2, which is an oily solid material, is used. The shaft portion is a small diameter portion 51c that extends continuously in the axial direction Z from the one end 51a.
Thus, according to the stick-shaped cosmetic 2 of the present invention, the tip (free end) side of the first oily solid 51 has a two-layer structure covered with the second oily solid 52, so that if the second oily solid 52 is opaque, the user can only see the second oily solid 52 and cannot tell that the first oily solid 51 exists inside. When the second oily solid 52 is consumed in this state, the first oily solid 51 inside is exposed, so that the user can be surprised and interested in the senses of sight, smell, touch, and other senses. In addition, if the second oily solid 52 is transparent, the user can see the first oily solid 51 through the second oily solid 52, so that high designability can be achieved by appropriately designing the shape and color tone of the first oily solid 51. Therefore, it is possible to differentiate the product and improve the product value.

When the shape of the cross section of the core 7 is constant along the axial direction Z as shown in FIG. 2(a), the outline of the small diameter portion 51c of the first oily solid 51 is constant along the axial direction Z as shown in FIG. 2(f). When the outer diameter of the outline of the cross section of the core 7 gradually decreases toward the tip 71 along the axial direction Z as shown in FIG. 7(b), the outline of the small diameter portion 51c of the first oily solid 51 is larger at the other end 51b than at the one end 51a as shown in FIG. 13(c). In this case, the outline of the small diameter portion 51c of the first oily solid 51 may be similar to each other at multiple positions in the axial direction Z.

Fig. 14(a) shows an example in which the core 7 placed in the mold 6 has an inclined surface 7d such that the cross section gradually decreases from the base end 72 side toward the tip end 71 side. The core 7 may be placed in the mold 6 before, after, or simultaneously with filling the mold 6 with the molten second oily solid material 52 from the opening 6d. After the second oily solid material 52 has solidified, as shown in Fig. 14(b), a core removal step is carried out to remove the core 7, and a first filling step is carried out to fill the recess 9A of the second oily solid material 52 with the molten first oily solid material 51. Then, a mold removal step is carried out to remove the mold 6 after the first oily solid material 51 has solidified, thereby producing a rod-shaped cosmetic material 2 having a multi-layer structure of the first oily solid material 51 and the second oily solid material 52, with an inclined surface 51e formed between one end 51a and the other end 51b, as shown in Fig. 14(c). 14(c), at a predetermined position in the axial direction Z, the contour shape of the cross section perpendicular to the axis (transverse section) of the small diameter portion 51c is formed asymmetrically about the axis Y. This is because the contour shape of the transverse section of the core 7 is asymmetric about the axis Y.
Examples of the cross-sectional contour of the small diameter portion 51c that is not symmetrical around the axis Y include a contour of the small diameter portion 51c that is a perfect circle that is eccentric with respect to the axis Y, a contour of the small diameter portion 51c that is a semicircle or trapezoid, or a contour that is line-symmetric with respect to a straight line perpendicular to the axis Y.

In this way, according to the stick-shaped cosmetic material 2 of the present invention, the contour shape of the small diameter portion 51c that is the shaft portion of the first oily solid material 51 can be varied, so that the shape of the first oily solid material 51 that is the inner layer can be formed as desired. Therefore, when the second oily solid material 52 is consumed through use and the first oily solid material 51 inside is exposed or the first oily solid material 51 is visible through the second oily solid material 52, the appearance and the design of the exposed surface can be selectively designed, which allows for further differentiation of products and improvement of commercial value. When the stick-shaped cosmetic material 2 is lipstick or lip balm, the colors and scents of the first oily solid material 51 and the second oily solid material 52 can be freely combined, which can provide the user with a sense of surprise and interest, allowing for differentiation of products and improvement of commercial value.

The shape of the small diameter portion 51c of the first oily solid 51 may have a flat surface, a concave curved surface, or a convex curved surface in cross section. In this case, the core 7 that forms the shape of the first oily solid 51 may be one that has a flat surface, a concave curved surface, or a convex curved surface formed on the outer circumferential surface, so that the shape of the small diameter portion 51c can be formed as described above, and the design can be improved.

14(c), the distance between one end 52a of the second oily solid 52 and one end 51a of the first oily solid 51 is the thickness T2 of the second oily solid 52 covering one end 51a of the first oily solid 51, and the minimum value of the thickness T2 is the minimum value Tmin of the thickness of the second oily solid 52. Also, the maximum value of the shortest radial distance T3 between the boundary 52c between the one end 52a of the second oily solid 52 and the outer peripheral surface 52d, and the boundary 51f between the inclined surface 51e of the first oily solid 51 and the one end 51a is the maximum value Tmax of the thickness of the second oily solid 52. In other words, the thickness of the second oily solid 52 can be freely controlled by changing the external shape (contour shape) of the core 7. This allows the thickness of the second oily solid material 52 to be adjusted according to the usage of the stick-shaped cosmetic product 2 as a product and the required design, and also allows the shape and thickness of the first oily solid material 51 to be adjusted.

By setting the thickness Tmax to, for example, 3.5 mm or more, it becomes easy to design the first oily solid 51 as if it is offset from the axis (axis Y) of the stick-shaped cosmetic 2. Accordingly, if the first oily solid 51 and the second oily solid 52 differ in color, texture, or usability, for example, it becomes possible to further expand the variation in the mixing ratio of the first oily solid 51 and the second oily solid 52 during use, such as the variation in the mixing ratio of the colors of the first oily solid 51 and the second oily solid 52. The range of the thickness Tmax differs from the viewpoint of the balance with the diameter of the stick-shaped cosmetic 2 to be the product, and depending on the degree of offset of the first oily solid 51 from the axis Y, but is preferably in the range of 3.5 mm to 10 mm.
In contrast, for example, when the molten second oily solid is placed in a mold and rotated to form an outer layer of the oily solid, the thickness of the second oily solid in its cross section varies little due to the influence of centrifugal force when the second oily solid is cooled and solidified, and the maximum thickness is inevitably kept below a certain value. For this reason, it is difficult to manufacture a stick-shaped cosmetic material 2 having a cross-sectional shape with an intentional (designed) change in layer thickness formed by the first oily solid 51 and the second oily solid 52 as described in this embodiment.

The ratio Tmax/Tmin of the maximum value Tmax to the minimum value Tmin of the thickness of the second oily solid 52 is preferably 2.5 or more from the viewpoint of how the first oily solid 51 appears when exposed from the second oily solid 52 and how the first oily solid 51 appears when seen through the second oily solid 52. In other words, in the present manufacturing method, which can obtain thickness variation and thickness controllability of the second oily solid 52, the stick-shaped cosmetic 2 can be manufactured in consideration of the usability and design. In addition, since the ratio Tmax/Tmin of the thickness of the second oily solid 52 is 2.5 or more (the thickness is uneven), it is possible to design the distance from the outer surface of the second oily solid 52 to the first oily solid 51 in various different ways. Accordingly, for example, if the first oily solid 51 and the second oily solid 52 have different colors, textures, or usability, it becomes possible to further expand the variation in the mixing ratio of the colors, etc., of the first oily solid 51 and the second oily solid 52 during use.

2, 2A, 2B: Stick-shaped cosmetic material 51: First oily solid material 51a: One end 51b: Other end 51c: Small diameter portion (shaft portion)
52 Second oily solid 53 Third oily solid 53a One end of third oily solid 53c Shaft 3 Cosmetic container 6 Mold 7, 7A, 7B, 7C Core 73 Communication passage 71a Opening at tip 72a Opening at base end 8 Plug member 81 Base end closing portion 82 Portion inserted into communication passage 83 Tip closing portion X Direction perpendicular to axis Y Axis Z Axial direction

Claims (13)

A method for producing an oily solid material, in which one end of a first oily solid material is covered with a second oily solid material,
A first filling step of filling at least a part of a bottomed mold with a molten second oily solid material;
a step of inserting a core into the mold before or after the first filling step, or simultaneously with the first filling step, and placing the core so that the core is not in contact with the mold;
a core removal process for removing the core from the mold;
a second filling step of filling the molten first oily solid material into the recess of the second oily solid material obtained by removing the core;
and a mold removing step of removing the mold,
the core has a communication passage that communicates between an opening at a tip end in a direction of insertion into the die and an opening at a base end,
the opening on the base end side is formed at a position where the opening is not buried in the second oily solid material when the molten second oily solid material is filled into the mold and the core is placed in the mold,
when placing the core in the mold before filling the mold with the molten second oily solid, when placing the core in the mold after filling the mold with the molten second oily solid, or when placing the core in the mold simultaneously with filling the mold with the molten second oily solid, the communication passage is closed in a state in which a space is left in a part of the communication passage,
and releasing the blocked state of the communication passage prior to removing the core. The method for producing an oily solid material according to claim 1, wherein the communication passage is blocked by blocking at least one of the opening on the base end side and the opening on the tip end side with a plug member. The method for producing an oily solid material according to claim 2, wherein the plug member is provided with an insertion part in the communication passage that is disposed in the communication passage and reduces the volume of the communication passage. The method for producing an oily solid material according to claim 3, wherein the plug member has a tip-side blocking portion at the tip of the portion inserted into the communication passage that blocks the opening of the tip portion. The method for producing an oily solid according to any one of claims 1 to 4, further comprising a cooling step of forcibly cooling the second oily solid after the first filling step or the setting step to promote solidification of the second oily solid. The method for producing an oily solid according to any one of claims 1 to 5, further comprising a cooling step of forcibly cooling the first oily solid after the second filling step to promote solidification of the first oily solid. The method for producing an oily solid according to any one of claims 1 to 6, further comprising a flattening step of removing a part of the upper surface of the solidified second oily solid to flatten it after the core removal step. The method for producing an oily solid according to any one of claims 1 to 7, further comprising a flattening step of removing a part of the upper surface side of the solidified first oily solid to flatten it after the second filling step. The method for producing an oily solid material according to any one of claims 1 to 8, wherein the core is a rod-shaped body, and the cross-sectional contour shape is constant along the axial direction, or the core has a uniform outer shape portion with a constant contour shape and a tapered tip portion. The method for producing an oily solid material according to any one of claims 1 to 9, wherein the core is a rod-shaped body, and the opening on the base end side is formed at a base end opposite to the tip end in the axial direction. The method for producing an oily solid material according to any one of claims 1 to 10, wherein the material of the core is at least one selected from metal, synthetic resin, synthetic rubber, and silicone rubber. The method for producing an oily solid material according to any one of claims 1 to 11, wherein the material of the mold is at least one selected from metal, synthetic resin, synthetic rubber, and silicone rubber. The method for producing an oily solid according to any one of claims 1 to 12, wherein the oily solid produced is a cosmetic product.

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