JP7264769B2 - Mold structure for stick cosmetics - Google Patents

Description

TECHNICAL FIELD The present invention relates to a stick-like cosmetic mold structure, and more particularly to a stick-like cosmetic mold structure for molding a stick-like cosmetic such as lipstick that is used by sliding along a sleeve portion.

For example, a stick-shaped cosmetic such as lipstick is molded into a desired stick-shaped shape by filling a molten cosmetic into a molding die and solidifying the cosmetic. The molded stick-shaped cosmetic is accommodated in a cylindrical sleeve portion via an intermediate plate, and is slid along the sleeve portion by an advancing/retreating mechanism that advances and retracts the intermediate plate so as to be taken in and out of the sleeve portion. there is

Conventionally, as a molding method for molding stick-shaped cosmetics such as lipstick, a molding method using a mold (see, for example, Patent Document 1), or a container having a sleeve in a molten state. A molding method in which cosmetics are directly filled and solidified (see, for example, Patent Document 2), a molding method using a rubber mold (elastic mold) (see, for example, Patent Document 3), and the like are generally known.

Japanese Patent Application Laid-Open No. 2008-23113 JP 2015-93043 A Japanese Patent Application Laid-Open No. 2000-290139

According to the conventional molding method for molding a stick-shaped cosmetic described above, in the molding method using a mold, the stick-shaped cosmetic is formed into a predetermined shape by using a mold having a fixed shape. However, on the other hand, it is difficult to mold, for example, a cosmetic having a complicated uneven pattern on its surface, and design is restricted. The molding method, in which cosmetics are directly filled into a container and solidified, has a simple production process and a high production pitch, making it suitable for mass production. Since the outer peripheral surface of the solidified stick-shaped cosmetic and the inner peripheral surface of the sleeve portion of the container are in close contact with each other, the solidified cosmetic may be bent or broken when the container is slid back and forth along the sleeve portion. Defective points may occur on the outer peripheral surface of the

In addition, in the molding method using a rubber mold, it is easy to apply uneven patterns and the like to the mold, and the mold can be elastically deformed to remove the mold, so it is possible to mold cosmetics with excellent design. However, on the other hand, it becomes difficult to accurately mold the stick-like cosmetic into a predetermined shape due to the influence of the elasticity of the mold. For this reason, especially in the stick cosmetic, the columnar portion formed to have the same outer diameter as the inner diameter of the sleeve tends to have a bulging portion or a tilted portion on the outer peripheral portion thereof. When the stick-like cosmetic is slid along the sleeve, these bulging or inclined portions interfere with the sleeve, causing the outer peripheral surface of the stick-like cosmetic to be scraped off or bent. There is

For this reason, there has been a development of a technology that enables the formation of uneven patterns on the surface to improve the design, and enables the stick-shaped cosmetic to be accurately molded into a predetermined shape that does not interfere with the sleeve portion of the container. Development is desired.

INDUSTRIAL APPLICABILITY The present invention is a stick-shaped cosmetic mold capable of forming a stick-shaped cosmetic with a predetermined shape that does not interfere with the sleeve portion of a container with high accuracy while improving designability by forming an uneven pattern on the surface. It is intended to provide structure.

The present invention relates to a cosmetic mold structure for forming a stick-like cosmetic that is reciprocally housed in a cylindrical sleeve and slid along the sleeve to mold the stick-like cosmetic. a columnar portion forming mold for forming a columnar portion having an outer peripheral wall shape along the inner peripheral wall shape of the sleeve portion; The mold for forming the columnar portion is provided with a forming hole having an inner peripheral wall shape that conforms to the outer peripheral wall shape of the columnar portion of the stick-shaped cosmetic material and penetrates in the vertical direction, and the end face portion forming member is elastic. A stick-shaped cosmetic mold, which is a deformable elastic mold, is attached to cover the lower end opening of the molding hole in the columnar part forming mold and is fixed to the peripheral edge of the lower end opening. The above objects are achieved by providing a structure.

According to the stick-shaped cosmetic mold structure of the present invention, a stick-shaped cosmetic having a predetermined shape that does not interfere with the sleeve portion of the container can be accurately molded while improving the design by forming an uneven pattern on the surface. can do.

1 is a cross-sectional view illustrating the configuration of a stick-shaped cosmetic mold structure according to a preferred embodiment of the present invention. FIG. FIG. 3A is a cross-sectional view of a mold main body, and FIG. 7B is a cross-sectional view of a fitting mounting member for explaining the structure of a mold for molding a columnar portion; It is a sectional view explaining composition of a lower metallic mold. FIG. 2(a) is a top view and FIG. 2(b) is a cross-sectional view taken along line AA of FIG. (a) to (e) are explanatory diagrams of steps for manufacturing a stick-shaped cosmetic and a lipstick product using a stick-shaped cosmetic mold structure. 1 is a vertical cross-sectional view of a lipstick product manufactured using a stick-shaped cosmetic mold structure; FIG.

A stick-shaped cosmetic mold structure 10 according to a preferred embodiment of the present invention shown in FIG. 1 is adopted as a mold structure for molding a stick-shaped cosmetic such as a lipstick 20 (see FIG. 6). be. In this embodiment, the molded lipstick 20 is, for example, a slim type lipstick. As shown in FIG. 6, the molded lipstick 20 is housed in the tubular sleeve portion 22 of the lipstick container 21 in a state of being integrally attached to the inner plate 24, and is moved by the well-known advancing/retreating mechanism 23. As the plate 24 advances and retreats, it slides forward and backward along the sleeve portion 22 so that it can be taken in and out of the sleeve portion 22 . The cosmetic mold structure 10 of the present embodiment is designed to accurately mold the columnar portion 20a of the lipstick 20, which is a stick-shaped cosmetic, particularly having an outer peripheral wall shape along the inner peripheral wall shape of the sleeve portion 22. When the lipstick 20 is put in and taken out of the sleeve part 22, an appropriate clearance is maintained so that the outer peripheral surface of the lipstick 20 can be prevented from interfering with the sleeve part 22, and the design of the lipstick 20 can be improved. It has a function to

The stick-shaped cosmetic mold structure 10 of the present embodiment is preferably housed in the cylindrical sleeve portion 22 of the lipstick container 21 so as to be able to move forward and backward, and is used as a stick-shaped cosmetic by sliding along the sleeve portion 22. is a cosmetic mold structure for molding lipstick 20 (see FIG. 6), and as shown in FIGS. Only the columnar portion forming mold 11 for forming the columnar portion 20a (see FIG. 6) having the outer peripheral wall shape along the inner peripheral wall shape and the end face portion 20b (see FIG. 6) of the stick-like cosmetic (lipstick) 20 are formed. and an end surface molding member 12 to be molded. The columnar portion 20a of the stick-shaped cosmetic (lipstick) 20 is transferred to the columnar portion forming mold 11 along the outer peripheral wall shape of the columnar portion 20a of the stick-shaped cosmetic (lipstick) 20. A molding hole 13 having an inner peripheral wall shape that determines the shape of the outer peripheral wall is provided through the vertical direction. It covers the opening 13a and is fixed to the peripheral edge of the lower end opening 13a. The end surface molding member 12 is made of an elastic material and serves as a deformable elastic mold.

Further, in this embodiment, in the columnar portion molding die 11, external air (air) is provided between the opening peripheral portion of the lower end opening 13a of the molding hole 13 and the end surface portion forming member 12 fixed to the opening peripheral portion. A gas passage 14 is preferably formed in parallel with the axial direction (extending direction) of the molding hole 13 for sending a gas such as.

Further, in the present embodiment, the columnar portion forming mold 11 includes a mold main body portion 15 having a fitting recess 15a formed in the upper portion thereof, and a fitting fitting member detachably and integrally fitted to the fitting recess 15a. 16 (see FIGS. 2(a) and 2(b)), and the molding hole 13 is provided so as to pass through the fitting mounting member 16 and the lower part of the mold main body 15. As shown in FIG. The molded hole 13 has a reduced diameter portion 13b in the upper region of the fit-in mounting member 16, and the gas passage 14 is provided at the bottom of the fit-in recess 15a with its upper end open.

Furthermore, in the present embodiment, a lower mold 17 having a contact overlapping surface 17a superimposed on the lower end surface 11a of the columnar part molding die 11 is integrally attached to the columnar part molding die 11 . . The end surface molding member 12 is sandwiched between the abutment overlapping surface 17a of the lower mold 17 and the lower end surface 11a of the columnar portion molding mold 11, thereby covering the lower end opening 13a of the molding hole 13. are fixedly attached to the peripheries of these openings. Formed inside the overlapping contact surface 17a of the lower mold 17 for sandwiching the end surface molding member 12, in other words, a deformation space portion 18 having the peripheral edge of the overlapping contact surface 17a for sandwiching the end surface molding member 12. ing. The space 18 for deformation communicates with a gas suction port 18a, and is decompressed by sucking the internal gas through the gas suction port 18a. It is a space for elastically deforming to the separating side.

In this embodiment, the stick-shaped cosmetic 20 molded by the stick-shaped cosmetic mold structure 10 is lipstick. Here, the stick-shaped cosmetic 20 molded by the stick-shaped cosmetic mold structure 10 has a rod-like shape such as lipstick, concealer, lip balm, lip gloss, stick eye shadow, eyebrow, eyeliner, stick foundation, and the like. It may be other various cosmetics having The formulation of the composition used for these cosmetics can be the same as the formulation of the composition used for this type of stick-shaped (rod-shaped) cosmetics. That is, the formulations of these compositions generally contain waxes, pastes and oils as main components, and furthermore, colorants such as coloring pigments and pearl pigments, powders such as extender pigments, polymers, and thickeners. , gelling agents, preservatives, moisturizing agents, UV absorbers, antioxidants, etc. As waxes, any of natural waxes such as vegetable waxes, animal waxes, petroleum waxes and mineral waxes or synthetic waxes may be used. Paraffin wax, polyethylene wax, ceresin, microcrystalline wax, Fischer-Tropsch wax, ethylene propylene oligomer, silicone wax and the like can be used as appropriate. On the other hand, oils include ester oils such as triglycerides, diglycerides, monoesters and diesters, branched hydrocarbon oils such as polyisobutene and squalane, silicone oils, fluorine oils, higher alcohols, polyglycerol esters, cholesterol esters, phytosterol esters, and isododecane. volatile hydrocarbon oils such as volatile silicones, etc. can be used. Each of these waxes and oils can be used alone or in combination of two or more.

In the stick-shaped cosmetic mold structure 10 of the present embodiment, as will be described later, the cosmetic in a melted state filled in the molding hole 13 is directly cooled and solidified by a coolant brought into contact with the mold to solidify the stick. Since the cosmetic 20 can be formed, it can be cooled in a more stable state, and even the stick-shaped cosmetic 20 made of a composition with soft physical properties can be accurately molded into a predetermined shape. becomes possible. In addition, when molding stick-type cosmetics with soft physical properties, it is possible to prevent the occurrence of dents in the stick due to pressing when inserting the container, and the occurrence of rubbing between the mold and the side of the stick when removing the container. Become.

In the present embodiment, the columnar portion forming mold 11 that constitutes the stick-shaped cosmetic mold structure 10 is preferably made of a metallic material having high thermal conductivity, such as aluminum or duralumin. As shown in FIGS. 1 and 2(a) and (b), the columnar portion forming mold 11 includes a mold main body 15 and a fitting mounting member 16. As shown in FIGS.

As shown in FIG. 2A, the mold main body 15 is formed with a fitting recess 15a having a cylindrical hollow cross-sectional shape in a portion surrounded by an upper standing wall 15b. An oblique notch surface 15c having an L-shaped cross-section is formed in the portion, and serves as the lower end surface 11a of the mold 11 for molding the columnar portion. The oblique cutout surface 15c having an L-shaped cross section extends obliquely at an inclination angle substantially the same as the inclination angle of the end surface portion 20b (see FIG. 6) of the stick-shaped cosmetic material 20. It is provided from one edge in the width direction of the mold main body 15 to a region close to the other edge in the width direction of the mold main body 15 beyond the central portion in the width direction. . A short side portion 15e of the L-shaped oblique cutout surface 15c is bent substantially vertically downward with respect to the long side portion 15d, and is provided so as to be connected to the other edge portion of the mold main body portion 15 in the width direction. ing.

In the mold body 15, the lower half of the molding hole 13 penetrates vertically through the lower portion below the fitting recess 15a, and the upper end opens to the bottom of the fitting recess 15a. In addition, the lower end is provided with a lower end opening 13a that is obliquely opened to the long side portion 15d of the notch surface 15c. Adjacent to the forming hole 13, a gas passage 14 is provided with its upper end opening to the bottom surface of the fitting recess 15a and its lower end opening obliquely to the periphery of the lower end opening 13a of the forming hole 13. ing.

The fitting mounting member 16 fitted to the fitting recess 15a of the mold main body 15 has the same hollow shape as the fitting recess 15a of the mold main body 15, as shown in FIG. 2(b). ing. As a result, the fitting mounting member 16 is detachably and tightly fitted to the upper part of the mold main body 15 forming the fitting recess 15a, which is surrounded by the standing wall 15b. A concave groove portion 16c having a rectangular cross-sectional shape in the vertical direction is formed in the upper end portion of the fitting mounting member 16. As shown in FIG. The upper half of the molding hole 13 is connected to the lower half of the mold main body 15 by penetrating vertically between the bottom surface of the recessed groove 16c and the lower surface of the fitting mounting member 16. is formed in such a way that The upper half portion of the molding hole 13 penetrating the fitting mounting member 16 has a diameter-reduced portion 13b whose diameter is reduced through a stepped portion 13d in an upper area of approximately two-thirds of the portion.

In this embodiment, a lower mold 17 is attached to the mold main body 15 . The lower mold 17 has an abutment overlapped surface 17a that overlaps the oblique notch surface 15c of the mold main body 15, which serves as the lower end surface 11a of the mold 11 for molding the columnar portion. The lower mold 17 is preferably made of a metal material having high thermal conductivity, such as aluminum or duralumin, similarly to the columnar part molding mold 11. As shown in FIGS. It is provided with an abutting overlapping surface 17a having an L-shaped cross-sectional contour that matches the oblique cutout surface 15c of the mold main body 15. As shown in FIG. The contact overlapping surface 17a is formed by overlapping a surface corresponding to the long side portion 17d of the L shape with a surface corresponding to the long side portion 15d of the oblique notch surface 15c of the mold main body portion 15, and the short side portion 17e thereof. The mold body 15 is arranged in such a manner that the corresponding surface is overlapped with the surface corresponding to the short side portion 15e of the oblique cut surface 15c of the mold main body portion 15. As shown in FIG. In the long side portion 17d of the abutment overlapping surface 17a, a deformation space portion 18 is formed in a region facing the lower end opening 13a of the molding hole 13 opening to the lower end surface 11a of the columnar portion molding die 11. A circular recess 17f is provided.

The circular recess 17f is a circular hollow having a diameter one size larger than the long diameter of the lower end opening 13a of the circular molding hole 13, which opens in an elliptical shape at the long side 15d of the oblique cut surface 15c of the mold main body 15. It has a cross-sectional shape and is formed with a depth of about 10 mm, for example. In addition, at the opening peripheral edge along the overlapping contact surface 17a of the circular concave portion 17f, the peripheral edge portion of the end surface portion forming member 12 is provided between the contact overlapping surface 17a and the lower end surface 11a of the columnar portion forming mold 11. 17 g of clamping locking recesses are continuously provided in an annular shape for fixing the clamping part in a clamped state. The gas passage 14 provided in the mold main body 15 adjacent to the molding hole 13 sandwiches and locks the peripheral edge of the opening of the circular recess 17f of the lower mold 17 on the long side 15d of the oblique cut surface 15c. It is provided in a region facing the recess 17g with its lower end opened.

In addition, in the central portion of the lower die 17 in the width direction, a lower gas flow path 17h is formed vertically penetrating between the obliquely arranged bottom of the circular recess 17f and the bottom of the lower die 17. formed. The lower end of the lower gas flow path 17h is open to the bottom surface of the lower mold 17 as a gas suction port 18a that communicates with the deformation space 18 formed by the circular recess 17f.

In this embodiment, the end surface molding member 12, which constitutes the stick-shaped cosmetic mold structure 10 together with the columnar molding mold 11, is an elastically deformable elastic mold made of, for example, silicone rubber or the like. Rubber mold) is preferred. An elastic mold such as a rubber mold is preferably used as the end surface forming member 12, so that the end surface portion 20b of the stick-shaped cosmetic (lipstick) 20 to be molded has an appearance shape excellent in design, such as an uneven pattern. can be given.

In this embodiment, the end surface forming member 12 is formed in an annular shape around the opening of the circular recess 17f of the lower mold 17, as shown in FIGS. 1 and 4(a) and (b). It is disc-shaped with an outer diameter similar to that of the pinch locking recess 17g. In addition, the end surface molding member 12 is positioned between the abutment superimposed surface 17a of the lower mold 17 and the lower end surface 11a of the columnar portion molding mold 11 in the annular clamping locking recess 17g of the lower mold 17. It includes an annular peripheral sandwiching locking portion 12b that is a portion to be sandwiched, and an elastic deformation portion 12a that is arranged to cover the opening surface of the circular recess 17f, which is a circular area inside the peripheral sandwiching locking portion 12b. is formed by In the elastically deforming portion 12a of the end surface molding member 12 arranged to cover the opening surface of the circular recess 17f of the lower mold 17, on the upper surface side of the elliptical area arranged also to cover the lower end opening 13a of the molding hole 13 , can be decorated with various uneven patterns.

The end surface portion forming member 12 is formed by fixing the lower mold 17 to a known joining means (not shown) such as a fixing screw in a state where the contact overlapping surface 17a is superimposed on the lower end surface 11a of the columnar portion forming mold 11. ) to the mold main body 15 of the columnar portion forming mold 11, the peripheral edge sandwiching locking portion 12b is engaged with the annular locking concave portion 17g of the lower mold 17 in the lower mold 17 and the lower end surface 11a of the mold 11 for molding the columnar portion. As a result, the end surface forming member 12 can cover the lower end opening 13a of the forming hole 13 and be fixed to the peripheral edge of the opening. In addition, as a result, a portion of the abutment overlapping surface 17a of the lower mold 17 surrounded by the pinch locking recess 17g that sandwiches the end surface molding member 12, that is, inside the pinch locking recess 17g, A deformation space 18 is formed so that the end surface forming member 12 can be elastically deformed on the side away from the lower end opening 13a of the forming hole 13 (see FIG. 1).

5(a) to 5(e) show how to manufacture the lipstick 20 and the lipstick product 30, which are stick-shaped cosmetics, using the stick-shaped cosmetic mold structure 10 of the present embodiment having the above-described configuration. As shown in FIG. 5, a filling step of filling the molding hole 13 with the cosmetic in a molten state (see FIG. 5A) and a cooling step of cooling and solidifying the filled cosmetic in a molten state to form the lipstick 20 (FIG. 5 (b)), a step of inserting the molded lipstick 20 so as to be inserted into the lipstick container 21 (see FIG. 6) (see FIG. 5(c)), and forming the end face portion from the end face portion 20b of the lipstick 20. An end surface peeling step for peeling off the member 12 (see FIG. 5(d)), and an extraction step for extracting the lipstick 20 together with the lipstick container 21 from the columnar portion molding mold 11 to form a lipstick product 30 (see FIG. 5(e)). A manufacturing method including and can be adopted. Alternatively, instead of the lipstick step (see FIG. 5(c)), the lipstick container 21 is set in advance in the cosmetic mold structure 10 including the columnar portion forming mold 11 and the end surface portion forming member 12. a cooling step of filling a molten cosmetic from the bottom of the set lipstick container 21 to carry out a filling step, then cooling and solidifying the filled molten cosmetic to form a lipstick 20; A manufacturing method is adopted in which an end surface peeling step of peeling the end surface molding member 12 from the end surface portion 20b of the lipstick container 20 and a pulling step of extracting the lipstick 20 together with the lipstick container 21 from the columnar portion molding mold 11 to form a lipstick product 30 are adopted. You can also

In the filling process, for example, in the stick-shaped cosmetic mold structure 10 assembled as shown in FIG. Molten cosmetic material is filled up to the bottom surface of the groove 16c through the opening (see FIG. 5(a)).

In the cooling step, the cosmetic mold structure 10 in which the molding hole 13 of the columnar part molding mold 11 is filled with the molten cosmetic is cooled from the outside by the cooling medium 31 so that the molding hole 13 is filled with the cosmetic material. The molten cosmetics are solidified by cooling (see FIG. 5(b)). In this embodiment, the columnar portion forming mold 11 and the lower mold 17 that constitute the stick-shaped cosmetic mold structure 10 are preferably made of a metal material having high thermal conductivity, such as aluminum or duralumin. Since it is possible to directly contact and cool the lipstick with a refrigerant such as a solid or liquid, it is possible to cool and solidify in a stable state compared to the case of general rubber molding, so the lipstick made of a composition with soft physical properties Even if it is 20, it is possible to mold it into a predetermined shape.

In the redening process, as shown in FIG. 5(c), the fitting mounting member 16 is extracted from the mold main body 15 of the columnar portion forming mold 11, and the mounting member 16 is passed through the molding hole 13. The upper half portion of the lipstick 20 (see FIG. 5(b)), which is molded by the half portion and has a diameter-reduced portion 20c in the upper region of approximately two-thirds, is inserted into the fitting portion with the fitting fitting member 16 pulled out. It is exposed inside the recessed portion 15a. Thereafter, in the lipstick applying step, the diameter-reduced portion 20c of the lipstick 20 is placed outside the diameter-reduced portion 20c arranged inside the sleeve portion 22 with the opening of the sleeve portion 22 of the lipstick container 21 facing downward. The lipstick container 21 is lowered into the fitting recess 15a until it is pushed into the inner plate 24 (see FIG. 6) having the same inner diameter as the diameter, and the lipstick 20 is attached to the inner plate 24 integrally. Here, the base end of the reduced diameter portion 20c of the lipstick 20, which is the stepped portion 20d, is arranged above the bottom surface of the fitting recess 15a so as to be separated from the bottom surface (Fig. 5(b)). ), the diameter-reduced portion 20c of the lipstick 20 can be fitted deep into the inner plate 24 without causing the tip of the sleeve portion 22 to interfere with the bottom surface of the fitting recess 15a.

In the end surface peeling step, as shown in FIG. 5D, a suction device 32 is connected to a gas suction port 18a communicating with a deformation space 18 formed on the back side of the end surface forming member 12, and a lower gas flow is performed. By sucking gas through the path 17h, the space 18 for deformation is depressurized, and the elastically deformable portion 12a of the end surface forming member 12 and the end surface 20b of the solidified lipstick 20 are separated through the gas passage 14. The end surface molding member 12 is separated from the end surface portion 20b of the lipstick 20 by sending a gas such as air therebetween.

In the removing step, as shown in FIG. 5(e), the lipstick 20 attached integrally to the inner plate 24 of the lipstick container 21 can be removed from the molding hole 13 by lifting the lipstick container 21 from the fitting recess 15a. can. At this time, by sending gas such as air between the end surface forming member 12 and the end surface portion 20b of the solidified lipstick 20 through the gas passage 14, the space between them becomes a negative pressure. , and the lipstick 20 can be removed smoothly. The extracted stick-shaped lipstick 20 forms a lipstick product 30 together with the lipstick container 21 .

Further, as shown in FIG. 6, the formed lipstick product 30 moves the inner tray 24 through a well-known advancing/retreating mechanism 23 by rotating the gripping sleeve 25 of the lipstick container 21 with respect to the sleeve portion 22, for example. It is designed to be able to move up and down. As a result, the stick-shaped lipstick 20 accommodated in the cylindrical sleeve portion 22 is moved along the sleeve portion 22 as the intermediate plate 24 moves back and forth by the advancing/retreating mechanism 23 while being attached to the inner plate 24 . By sliding forward and backward, it can be put in and taken out from the sleeve portion 22 and used.

According to the stick-shaped cosmetic mold structure 10 of the present embodiment having the above-described configuration, it is possible to form an uneven pattern on the surface, thereby improving the design, while providing a clearance that does not interfere with the sleeve portion 22 of the lipstick container 21. It is possible to accurately mold the lipstick 20, which is a stick-shaped cosmetic having a predetermined shape holding the .

That is, according to the present embodiment, the cosmetic mold structure 10 is for forming the columnar portion 20a of the lipstick 20 having the outer peripheral wall shape along the inner peripheral wall shape of the sleeve portion 22 of the lipstick container 21. Equipped with a mold 11 and an end surface molding member 12 consisting of an elastic mold for molding only the end surface portion 20b of the lipstick 20, the entire columnar portion 20a of the lipstick 20 is formed into an inner peripheral wall along the outer peripheral wall shape thereof. Molding is possible using a columnar portion molding die 11 having a molding hole 13 having a shape. As a result, the entire columnar portion 20a of the lipstick 20 has a predetermined shape with a clearance that does not interfere with the sleeve portion 22 of the lipstick container 21, compared to the case where the columnar portion is molded by a general rubber molding method. Thus, molding can be performed with high accuracy.

In addition, by elastically deforming the end surface molding member 12 made of an elastic mold, which molds only the end surface portion 20b of the lipstick 20, for example, a highly decorative concave-convex pattern can be easily formed on the end surface portion 20b. It is possible to easily obtain a lipstick with an improved design due to the uneven pattern formed on the end face portion 20b.

It should be noted that the present invention is not limited to the above embodiments, and various modifications are possible. For example, it is not always necessary to integrally attach a lower mold having a space for deformation to the lower end surface of the columnar part forming mold. and the lower end surface of the mold for forming the columnar portion, and fixed to the peripheral edge portion of the lower end opening of the forming hole. The end surface forming member may be fixed to the opening peripheral edge of the lower end opening of the forming hole via an adhesive or the like.

10 Mold structure for stick-shaped cosmetic 11 Mold for forming columnar portion 11a Lower end surface 12 End surface forming member 12a Elastically deforming portion 12b Peripheral clamping portion 13 Molding hole 13a Lower end opening 13b Diameter reduction portion 14 Gas passage 15 Mold Body portion 15a Fitting concave portion 15b Standing wall 15c Oblique cutout surface 16 Fitting mounting member 17 Lower mold 17a Contact overlapping surface 18 Deformation space portion 18a Gas suction port 20 Stick cosmetic (lipstick)
20a columnar portion 20b end surface portion 20c reduced diameter portion 20d stepped portion 21 lipstick container 21
22 sleeve portion 23 retraction mechanism 24 middle plate 30 lipstick product 31 cooling water 32 suction device

Claims (6)

A cosmetic mold structure for molding a stick-like cosmetic that is movably accommodated in a cylindrical sleeve portion and slid along the sleeve portion to be used,
A columnar portion forming mold for forming a columnar portion having an outer peripheral wall shape along the inner peripheral wall shape of the sleeve portion in the stick-like cosmetic, and an end surface portion molding for forming only an end surface portion of the stick-like cosmetic. and
The mold for molding the columnar portion is provided with a molding hole having an inner peripheral wall shape along the outer peripheral wall shape of the columnar portion of the stick-shaped cosmetic, penetrating in the vertical direction,
The end surface molding member is an elastic mold that can be elastically deformed, and is attached in a state of being fixed to the opening peripheral edge of the bottom opening, covering the bottom opening of the molding hole in the column molding mold. there is
Mold structure for stick cosmetics. A gas passage is formed in the mold for forming the columnar portion, through which gas is sent between the opening peripheral portion of the lower end opening of the forming hole and the end face portion forming member fixed to the opening peripheral portion. Item 2. The stick-like cosmetic mold structure according to item 1. The mold for forming the columnar portion includes a mold main body portion having a fitting recess formed in the upper portion thereof, and a fitting fitting member detachably and integrally fitted to the fitting recess, and the molding hole is provided through the fitting mounting member and the lower part of the mold main body, and the molding hole in the portion penetrating the fitting mounting member has a reduced diameter portion in the upper region, 3. The stick-shaped cosmetic mold structure according to claim 2, wherein the gas passage is provided with an upper end opening in the bottom surface of the fitting recess. A lower mold having an abutment overlapping surface that is superimposed on the lower end surface of the columnar portion molding mold is attached integrally to the columnar portion molding mold, and the abutment overlapping surface of the lower mold is attached to the columnar portion molding mold. and the lower end surface of the mold for forming the columnar portion, and the end surface forming member is attached in a state of covering the lower end opening of the forming hole and being fixed to the peripheral edge of the opening. a deformation space for elastically deforming the end surface molding member toward a side away from the lower end opening of the molding hole inside a portion sandwiching the end surface molding member in the contact overlapping surface of the lower mold; The stick-like cosmetic mold structure according to any one of claims 1 to 3, wherein a part is formed. The space for deformation communicates with a gas suction port, and is decompressed by sucking gas through the gas suction port, so that the end surface forming member is moved away from the lower end opening of the forming hole. 5. The stick-like cosmetic mold structure according to claim 4, which is elastically deformable. A method for producing a stick-shaped cosmetic product using the stick-shaped cosmetic mold structure according to any one of claims 3 to 6,
a filling step of filling the molten cosmetic into the molding hole; a cooling step of cooling and solidifying the filled molten cosmetic to form a stick-like cosmetic; An end surface peeling step for peeling the part forming member, and a removing step for removing the stick-like cosmetic together with the stick-like cosmetic container from the columnar part forming mold to make a stick-like cosmetic product,
In the end surface peeling step and the extraction step, the end surface portion forming member fixed to the opening peripheral portion of the lower end opening of the forming hole and the opening peripheral portion from the gas passage whose upper end portion opens to the bottom surface portion of the fitting recess. A method for producing a stick-shaped cosmetic product in which gas is sent between

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