JP2010094161A - Method of manufacturing solid cosmetic material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively reduce burrs in the periphery of the surface of a cosmetic material, and to effectively reduce scattering and dropping of the burrs caused by the vibration or impact. <P>SOLUTION: First, a cosmetic tray 2 is set. The cosmetic tray 2 has a tapered part gradually extending sideways upward in the vicinity of the upper end of the inner surface raised from the periphery of the bottom. Next, the cosmetic tray 2 is filled with the cosmetic material, and the cosmetic material loaded into the cosmetic tray 2 is pressed by using a presser head 5. A pressing surface 1a of the presser head 5 has a surface shape corresponding to the shape of an opening surrounded by the inner surface 2c of the cosmetic tray 2. The pressing surface 1a is larger than the minimum opening area in the shape of the opening and smaller than the maximum opening area. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for producing a solid cosmetic, and more particularly to press molding of a cosmetic filled in a decorative dish.

  In general, press molding of a cosmetic filled in a decorative dish is performed by pressure compression by pressing a press head. By this pressing, cosmetic burrs, that is, thin protruding pieces may be generated around the cosmetic surface. And if an impact or vibration is applied afterwards, the burrs break and fall into a powdery state, resulting in poor appearance of the product. The reason for the occurrence of burrs is that cosmetics pushed out by the press enter and solidify into clearances (minute gaps) that exist between the press head and the decorative dish.

  As one countermeasure against such burrs, Patent Document 1 discloses a technique in which a cosmetic filled in a decorative dish is press-molded with an elastic press head via a flexible sheet. . The press head is elastically deformed by the pressing force and spreads in the entire recess of the vanity plate without a gap. As a result, the clearance between the press head and the decorative dish is reduced, and the cosmetic material itself entering there is reduced, so that burr is suppressed.

JP-A-8-154732

  However, in the method of Patent Document 1 described above, if the press head is pushed down to some extent and sufficient elastic deformation is not caused, the clearance is not blocked. Therefore, in the initial stage of the press, the elastic deformation of the press head is insufficient, so that there is a possibility that the clearance into which the cosmetic can enter still remains. For these reasons, a more effective burr suppression technique has been desired.

  The present invention has been made in view of such circumstances, and its purpose is to more effectively suppress burrs around the cosmetic surface, and more effectively reduce burrs from being scattered and dropped due to vibrations and impacts. It is to be.

  In order to solve such a problem, the present invention is a first step of setting a decorative dish, a second step of filling a cosmetic in the decorative dish, and a cosmetic dish filled with a press head. There is provided a method for producing a solid cosmetic comprising a third step of pressing the cosmetic. Here, the decorative dish has a bottom portion and an inner surface that stands up from the periphery of the bottom portion, and a taper that gradually spreads to the side as it goes upward is provided near the upper end of the inner surface. . The press head has a surface-shaped press surface corresponding to the opening shape surrounded by the inner surface of the decorative dish. This press surface is larger than the smallest minimum opening area in the opening shape of the decorative dish and smaller than the largest maximum opening area.

  In the present invention, the taper preferably extends in a curved shape or a straight shape. Further, the entire periphery of the edge of the press surface may be chamfered into a curved surface. Furthermore, the press head is preferably formed of an elastic body.

  According to the present invention, a press head having a press surface that is larger than the minimum opening area in the opening shape of the decorative dish and smaller than the maximum opening area is used. In the process of pressing down the press surface during pressing, the dressing plate is gradually spread sideways while the press surface and the inner surface are in contact with each other due to the tapered shape of the inner surface. As a result, the cosmetic can be pressed with almost no clearance for the pressed cosmetic to enter. As a result, it is possible to effectively suppress the occurrence of burrs on the surface of the cosmetic material, and to effectively reduce the scattering and dropping of burrs caused by vibrations and impacts.

  FIG. 1 is a bottom view of a press pad used as a part of a press head. This press pad 1 has a surface shape corresponding to the opening shape of a cosmetic dish 2 (see FIG. 3) filled with cosmetics, and is formed of an elastic body (such as elastomer (synthetic rubber)) or a hard non-elastic body. Has been. In the case of using an elastic body, as described in Patent Document 1 described above, the clearance due to elastic deformation can be reduced (suppression of burrs due to this), and the effect of absorbing variations in the filling amount of cosmetics is also expected. it can. The lower surface (bottom surface) of the press pad 1 functions as a press surface 1a that abuts on the cosmetic surface in the decorative tray 2 and pressurizes and compresses it. In addition, in order to perform the transfer to the cosmetic surface, the press surface 1a may be formed with a mesh, a string, a character, a logo, or the like.

  FIG. 2 is a side view of the press pad 1. Most of the press surface 1a is formed in a flat shape, but its edge 1b is chamfered in a curved shape over the entire circumference. Specific values regarding the diameter of the roundness of the edge 1b are the strength resulting from the prescription of the cosmetic, the magnitude of vibration and impact that will be applied during the transportation of the product, the opening area of the decorative dish 2, and the height of the generated burr. It is set appropriately through experiments and simulations, taking into account such factors. Symbol S1 shown in the figure indicates the area (press area) of the press surface 1a.

  FIG. 3 is an explanatory diagram of a decorative dish 2 as an example. This decorative dish 2 has a substantially rectangular bottom portion 2a and side portions 2b erected vertically upward from the periphery of the bottom portion 2a, and is made of a metal such as aluminum. A tapered portion 2d is provided in the inner surface of the side portion 2b, that is, in the vicinity of the upper end of the inner surface 2c. The tapered portion 2d gradually spreads to the side as it goes upward, and in this embodiment is curved in a curved surface shape. Thereby, regarding the opening shape surrounded by the inner surface 2c, the opening area S2 is not constant, and the opening area S2 increases toward the upper end. Hereinafter, among the opening area S2 surrounded by the inner surface 2c, the smallest one is referred to as “minimum opening area S2min”, and the largest one is referred to as “maximum opening area S2max”. One of the features of this embodiment is the size relationship between the press area S1 and the opening areas S2min and S2max. Specifically, the press area S1 is larger than the minimum opening area S2min and the maximum opening area. It is smaller than S2max (S2min <S1 <S2max).

  FIG. 4 is an explanatory diagram of a decorative dish 2 as another example. Also in this configuration, the tapered portion 2d gradually expands as it goes upward, but unlike the configuration of FIG. 3, it extends in a straight shape, that is, obliquely with respect to the vertical direction. Since other configurations are the same as those in FIG. 3, the same reference numerals as those in FIG. 3 are used, and description thereof is omitted here.

  Next, a method for press-molding solid cosmetics such as foundation, face powder, and eye shadow using the above-described press pad 1 and decorative dish 2 will be described with reference to FIGS. In the following description, the case where the decorative dish 2 having the curved tapered portion 2d shown in FIG. 3 is used will be described. Instead, the decorative dish 2 having the straight tapered portion 2d shown in FIG. May be used.

  First, as shown in FIG. 5, the decorative dish 2 is set in the accommodation space formed in the mold 3. The accommodation space of the mold 3 is formed to be slightly larger than the size of the decorative dish 2 in order to allow lateral expansion (deformation) of the decorative dish 2 by pressing. At this point, there is a slight clearance between the outer surface of the vanity plate 2 and the inner surface of the accommodation space.

  Next, as shown in FIG. 6, cosmetics (filler) are injected and filled into the decorative dish 2 from an injection nozzle (not shown), and the decorative dish 2 is set immediately below the press head 5. The press head 5 can be moved up and down by a lifting mechanism (not shown), and is composed of a hard press substrate 6 formed of ABS resin or the like, and a press pad 1 attached to the press substrate 6. Here, the filler may be either a cosmetic powder or a cosmetic slurry. Slurry refers to a fluid in which a cosmetic base material for solid powder cosmetics such as foundation, face powder, and eye shadow is mixed with a volatile solvent such as ethanol, water, liquid paraffin, isoparaffin, and isopropyl alcohol. In addition, a single or a plurality of thin papers 7 such as mesh, paper, and Manila hemp fiber are provided between the press pad 1 and the decorative dish 2. When the mesh and paper are used as a plurality of thin papers 7, an air bleeding action at the time of pressing can be obtained by arranging the mesh on the press surface (molding surface) side.

  Next, as shown in FIG. 7, the press head 5 in the raised state is lowered, and the cosmetic filled in the cosmetic dish 2 is pressed by the press pad 1. FIG. 8 is an explanatory view of the deformation of the vanity plate 2 when the press pad 1 is pressed down. In FIG. 8, for convenience of explanation, the thin paper 7 is omitted between the press pad 1 and the decorative dish 2. The pressed-down press pad 1 enters the opening of the decorative dish 2 and gradually moves downward. As described above, the press area S1 is larger than the minimum opening area S2min. Therefore, the press pad 1 is displaced downward with almost no clearance between the inner surface 2c and the press pad 1. The press area S1 is smaller than the maximum opening area S2max. Therefore, the press pad 1 is guided into the opening of the dressing plate 2 without crushing the side portion 2b. Here, if the contact point at which the press pad 1 contacts the inner surface 2c is p, the contact point p gradually shifts on the tapered portion 2d as the press pad 1 is pushed down. Since the tapered portion 2d is formed in a curved surface shape, a horizontal component f 'is generated from the vertical pressing force f acting on the contact point p (even in the straight shape described above). By this component f ', the side part 2b of the vanity plate 2 is gradually spread in the lateral direction. When the side part 2b that is spread out contacts the mold 3, further displacement of the side part 2b is restricted.

  The above process will be described from the viewpoint of pressure compression of cosmetics. The press surface 1 a of the press pad 1 that has entered the opening of the decorative dish 2 comes into contact with the cosmetic surface in the decorative dish 2. In this state, since the press surface 1a is in contact with the inner surface 2c, there is almost no clearance between them, and the pressing of the cosmetic in the decorative dish 2 is started. Then, the cosmetic press is performed in a state where the contact between the press surface 1a and the inner side surface 2c is maintained while the side portion 2b is spread, in other words, no clearance is generated. Therefore, the pressed cosmetic is less likely to leak from between the press surface 1a and the inner surface 2c. This will be explained in comparison with the above-described conventional method (Patent Document 1). In the conventional method, the clearance that allows the cosmetic material to enter still remains in the initial stage of the press where the elastic deformation of the press head is insufficient. There is a possibility that. On the other hand, in the present embodiment, the shape of the tapered portion 2d is mainly used (not to eliminate the combined use of elastic deformation) and the clearance is eliminated, so from the very initial stage of the press. The effect of reducing clearance can be expected.

  Thereafter, the press head 5 is raised, and post-treatment such as drying is appropriately performed to complete a solid cosmetic punching product.

  Thus, according to this embodiment, the size of the press surface 1a of the press pad 1 is set to a press area S1 that is larger than the minimum opening area S2min of the vanity plate 2 and smaller than the maximum opening area S2max. In the process of pressing down the press surface 1a in contact with the inner surface 2c of the decorative plate 2, the taper shape provided in the vicinity of the upper end of the inner surface 2c causes a component f from the pressing force f of the press head 5 to the side. 'Is generated and the opening of the vanity plate 2 is expanded. As a result, the cosmetic can be pressed with almost no clearance for the pressed cosmetic to enter. As a result, it is possible to more effectively suppress the occurrence of burrs on the surface of cosmetics, compared to the conventional method of closing the clearance only by the elastic deformation of the press head, and more effective for scattering and dropping of burrs caused by vibration and impact. Can be reduced.

  Moreover, according to this embodiment, the burr | flash of the cosmetics surface along the inner surface 2c can be suppressed more effectively by using what chamfered the edge 1b of the press surface 1a. Further, due to the chamfered shape of the press pad 1, the cosmetic surface has a curved surface shape that gently leads from the inner side surface 2 c toward the center of the decorative dish 2. Therefore, even if some burrs are generated, it is difficult to break due to vibrations and impacts, so that the scattering and dropping off of the cosmetic can be effectively reduced. At the same time, the burr is gently connected to the cosmetic surface, so the burr becomes inconspicuous. As a result, it is possible to effectively prevent the appearance of the product from deteriorating.

  In particular, if an elastic body is used as the press pad 1, the generation of burrs can be more effectively suppressed. This is because the elastic deformation at the time of pressing causes the press pad 1 to spread without gaps throughout the recess of the decorative dish 2, so that the clearance between the press pad 1 and the decorative dish 2 is relaxed. At the same time, variations in the filling amount of the cosmetic can be effectively absorbed.

  In the above-described embodiment, as the press head 5, a chamfered edge 1b of the press surface 1a is used, but a chamfered one may be used.

Bottom view of press pad Side view of press pad Illustration of a decorative dish as an example Illustration of a decorative dish as another example Explanatory drawing of pressing process Explanatory drawing of pressing process Explanatory drawing of pressing process Explanatory drawing of the deformation of the vanity plate with the pressing of the press pad

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Press pad 1a Press surface 1b Edge part 2 Cosmetic dish 2a Bottom part 2b Side part 2c Inner side surface 2d Tapered part 3 Mold | die 5 Press head 6 Press substrate 7 Thin paper

Claims (4)

In the method for producing a solid cosmetic,
A first step of setting a decorative dish provided with a taper that gradually spreads laterally toward the top in the vicinity of the upper end of the inner surface that stands up from the periphery of the bottom;
A second step of filling the cosmetic dish with cosmetics;
A press head having a surface shape corresponding to the opening shape surrounded by the inner surface of the decorative dish, and having a pressing surface that is larger than the smallest minimum opening area and smaller than the largest maximum opening area in the opening shape. And a third step of pressing the cosmetic filled in the decorative dish using the method of manufacturing a solid cosmetic.   The method for producing a solid cosmetic according to claim 1, wherein the taper extends in a curved shape or a straight shape.   3. The method for producing a solid cosmetic according to claim 1, wherein the entire periphery of the edge of the press surface is chamfered into a curved surface.   The method for producing a solid cosmetic according to any one of claims 1 to 3, wherein the press head is formed of an elastic body.

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