JP5693141B2 - Elastic mold for molding low-hardness contents and molding method using the same - Google Patents

Description

  The present invention relates to an elastic mold for molding a low-hardness content and a molding method using the same.

  Traditionally, make-up products such as lipsticks and eye shadows have an excellent cosmetic effect as well as a beautiful appearance. It would be desirable to improve the appearance with a concavo-convex pattern as a motif.

  In addition, in makeup products, it is desired to give a three-dimensional shape with a delicate design. In particular, in recent years, there is a tendency to favor smooth cosmetics that have a soft surface and low resistance during application. In addition, silicone oil is frequently used as the oil component to be blended.

  A so-called rubber mold that uses a silicone rubber mold, fills with cosmetics, cools and solidifies, and then expands the mold under reduced pressure to take out the solid molded product. Molding is known (Patent Document 1).

  However, the above rubber mold molding is suitable mainly for molding relatively hard contents such as food, and in the case of soft contents such as lipstick and eye shadow, the mold is abruptly reduced under reduced pressure. When expanded, the surface of the molded product does not leave the mold, and cracks and chips are likely to occur. Also, since the mold expands radially under reduced pressure, it is suitable when the shape to be molded is a radially expanded shape, but depending on the shape to be molded, it cannot be pulled out well and part of the molded product is missing. There is.

  In addition, since rubber molding requires expansion by decompression, the rubber is thin, and when the molten contents are filled, the mold is deformed by heat and weight, and an accurate shape cannot be maintained. Further, when it is repeatedly molded, the oil such as silicone oil blended into the molded product penetrates into the silicone rubber, the mold swells, and the exact shape cannot be reproduced, resulting in variations in mass production.

  As described above, the conventional rubber molding is not necessarily sufficient when mass-production is performed such that a surface of the contents having low hardness such as a makeup product has a delicate three-dimensional pattern. .

JP 2004-1113012 A

  The present invention is capable of accurately molding a three-dimensional shape on the surface of a low-hardness content, and uses an elastic mold that is excellent in durability and suitable for mass production without being deformed even when repeatedly molded. It is an object to provide a molding method.

The first invention is a thickness-thin flat elastic having a frame at the periphery for molding a content of 10-20 hardness (measured with a card meter at 37 ° C., pressure-sensitive shaft diameter 3 mm, 800 g load). A mold, a dish-shaped container is pressure-bonded in an elastic mold frame, and a space formed between the dish-shaped container and the elastic mold is filled with a molten content, and the content is cooled and solidified. Later, the elastic mold is flexed in the opposite direction to the contents while the elastic mold frame is opened to the left and right, so that the elastic mold is gradually pulled away from the edge of the dish-shaped container to the center of the contents. The flat elastic mold is characterized in that the contents molded into the shape can be taken out from the elastic mold together with the dish-like container.

A second invention is a flat elastic type characterized in that the thick flat elastic type material is silicone rubber.

The third invention is a flat elastic type, wherein the thickness height of the flat elastic type (B) is 10-40% of the elastic type bottom length of (A).

A fourth invention is a flat elastic type, wherein the bottom thickness of the elastic type of the thick flat (E) is 20 to 40% of the length of the base of the contents, molding (D) is there.

A fifth invention is a flat elastic type, wherein the thickness flat elastic type height (B) is 20 to 40% of the length of the base of the dish-shaped container (H).

A sixth invention is a flat elastic type, wherein the thickness flat elastic type frame width (F) is 10 to 30% of the length of the base of the dish-shaped container (H) .

7th invention is the method of shape | molding the content whose hardness (The measured value in 37 degreeC by a card meter, a pressure sensitive shaft diameter of 3 mm, and a load of 800 g) is 10-20 using the flat elastic type | mold described, crimp the dish-like container-elastic in the frame, filling the contents in a molten state into a space formed between the dish-shaped container and the elastic type, the elastic type after the contents have been cooled and solidified The elastic mold is gradually pulled away from the edge of the dish-shaped container to the center of the contents by bending the entire elastic mold in the opposite direction to the contents while opening the frame part left and right, and the contents molded on the dish-shaped container The molding method is characterized in that an object is taken out of the flat elastic mold together with the dish-like container.

  According to the elastic mold of the present invention and the molding method using the same, the surface of a soft content having a hardness (measured value at 37 ° C. with a card meter, a pressure sensitive shaft diameter of 3 mm, a load of 800 g) of 10 to 20 is three-dimensional. Can be accurately molded into any shape.

  In addition, even when it is repeatedly molded, there is no elastic deformation due to oil penetration or heat, and a molded product can be manufactured stably in mass production.

Schematic diagram showing the elastic mold and molding method of the present invention ((a) setting step, (b) filling step, (c) cooling / solidification step, (d) removal step, (e) finishing step) Schematic showing a state in which a dish-like container is pressure-bonded to the elastic mold of the present invention and filled with contents Schematic showing the process of incorporating a molded product molded on a dish-shaped container into a product container (first embodiment) (A) Front view, (b) AA sectional view of the dish-like container of the first embodiment Schematic showing the process of direct molding into product containers (second embodiment)

  Hereinafter, the configuration of the present invention will be described in detail based on an example of an embodiment shown in the drawings.

  FIG. 1 shows an embodiment of an elastic mold and a molding method according to the present invention. The dish-shaped container (2) is crimped and set on the elastic mold (1), and a space for filling the contents is formed between the dish-shaped container (2) and the elastic mold (1) ((A) Set process). Next, the liquid content dissolved by heating is filled into the space formed between the dish-shaped container and the elastic mold through the filling hole (3) provided at the bottom of the dish-shaped container (2) from the nozzle (5). ((B) filling step). The filled content (4) is cooled and solidified to form a desired shape ((c) cooling / solidification step). After the contents (4) are solidified, the frame part (8) of the elastic mold (1) is pushed open to the left and right (outward), and the elastic mold (1) is bent in the direction opposite to the contents (4). By pulling, the elastic mold (1) is gradually pulled away from the edge of the dish-like container (2) to the center of the contents (4), and the contents formed in the dish-like container are taken out ((d) removal step ) To obtain a molded product (6) ((e) finishing step).

  The elastic mold and molding method of the present invention are suitable for three-dimensional molding of soft contents, and the contents can be applied to oily cosmetics such as lipsticks, eye shadows and foundations, for example.

  The contents must be excellent in usability as a cosmetic (easy to remove with a brush) and have a hardness excellent in releasability without adhering to the elastic mold. From the test results shown in Table 1, the hardness of the content is 10 to 20 measured at 37 ° C. with a card meter (manufactured by iTechno Engineering Co., Ltd.), pressure-sensitive shaft diameter of 3 mm, and 800 g weight. This is because the hardness of 10 to 20 is excellent in releasing from the elastic type, and is easy to scoop with a brush and excellent in usability.

  Elastic materials such as rubber or elastomer can be used as the elastic material, but the surface tension is small and the releasability is excellent. Also, it is chemically stable and has no interaction with the contents. It is preferable to use silicone rubber because it is excellent.

  Silicone rubber that is too soft is easily damaged in mass production and has poor durability. Moreover, if it is too hard, it will be difficult to bend the elastic mold and release will be difficult, and the molding surface will be easily damaged. Accordingly, the silicone rubber preferably has a durometer (A type: JIS K 6253 compliant) hardness of about 40, a tensile strength of 5.5 to 5.7 MPa, and a tear strength of 21 to 26 kN / m. For the silicone elastic mold, RTV rubber (Room Temperature Vulcanizing: room temperature curing type) two-component mixed type (main agent: KE-1310ST, curing agent: CAT-1310S) manufactured by Shin-Etsu Chemical Co., Ltd. was used.

  The elastic type of the present embodiment has a shape that is hollowed out so that the center is deepest, and the contents are molded into a dome shape, but a geometric pattern, flowers, etc. are formed on the surface of the contents. An uneven shape for attaching a decorative shape as a motif can be applied to the inner surface of the elastic mold.

  The dish-shaped container is pressure-bonded to the elastic mold, and a space for molding the contents is formed between the elastic mold and the dish-shaped container. The dish-shaped container and the elastic mold can be fixed by a frictional force between the peripheral edge portion (11) of the dish-shaped container and the frame portion (8) of the elastic body. ) And the elastic frame portion (8) can be fixed by a method such as installing and fitting a rib.

  The filling of the contents is carried out through a filling hole (3) provided in the bottom of the dish-like container (2) from the nozzle (5) with the liquid content melted by heating. In order to leave the mark of the filling hole on the surface of the molded product and impair the appearance, normally, a filling hole is provided at the bottom of the dish-shaped container, but if the mark of the filling hole is not noticeable due to the shape to be molded, It is also possible to provide a filling hole in the surface portion, that is, the elastic mold.

  The molded contents are opened by pushing the frame part (8) of the elastic mold (1) left and right (outward) and bending the elastic mold (1) in the direction opposite to the contents (4). The elastic mold (1) is gradually pulled away from the edge of the container (2) to the center of the contents (4) and taken out together with the dish-shaped container. For this reason, the elastic mold has a thickness suitable for bending. Therefore, the elastic mold can be made relatively thick, and even when it is repeatedly molded, there is no deformation due to heat or swelling due to oil, and a highly accurate molded product can be obtained.

  The elastic mold can be bent and removed by hand, but it can also be automated by a machine, for example, vacuuming and sucking the peripheral edge of the elastic mold and bending it to the opposite side of the contents .

  FIG. 3 shows the steps ((a) to (c)) of setting the molded product (6) formed in the dish-shaped container in the product container. As shown in FIG. 5, the product container is set in an elastic mold. It is also possible to directly mold the contents into the product container by filling the contents from the filling hole at the bottom of the product container.

  The moldability evaluation performed on the elastic mold according to the present invention is described as an example. Table 2 shows the dimensions of each part of the elastic mold, contents, and dish-shaped container, and the evaluation of moldability. In addition, A thru | or H in a table | surface is corresponded to the dimension of each site | part of the elastic type | mold shown in FIG. 2, a content, and a dish-shaped container.

  Measure the bottom length (A), height (B), bottom thickness (E), and frame width (F) of the elastic mold as numerical values for the elastic mold, and measure the height of the molded product ( C) and width (D) were measured, and the height (G) and width (H) of the dish-shaped container were measured as numerical values relating to the dish-shaped container (FIG. 2). Also, B / A is a numerical value indicating the shape of the elastic mold, E / D is a numerical value indicating the correlation between the elastic mold and the contents, and B / H is a numerical value indicating the correlation between the elastic mold and the dish-like container. , B / G and F / H were calculated respectively.

  B / A is a numerical value indicating the shape of the elastic type, and is related to the flexibility of the elastic type. The contents molded into a dish-shaped container are released from the elastic mold by bending the elastic mold, but if the elastic mold is difficult to bend, the contents will not be released and the molded product will be chipped or cracked. It becomes. Further, if the elastic mold is bent too much, it becomes difficult to mold an accurate three-dimensional shape.

  E / D is a numerical value indicating the correlation between the elastic mold and the contents, and is related to the moldability of the contents. That is, if E / D is too small, the thickness of the elastic type becomes thin with respect to the size of the contents, and it becomes difficult to obtain an accurate three-dimensional molded product. On the other hand, if E / D is too large, the elastic mold is difficult to bend, the contents are difficult to release from the elastic mold, and the molded product is chipped or cracked.

  B / H and F / H are numerical values indicating the correlation between the elastic mold and the dish-shaped container, and are related to ease of removal from the dish-shaped container when the elastic mold is bent. That is, if B / H and F / H are too small, the elastic mold is easily detached from the dish-shaped container, and it becomes difficult to obtain an accurate three-dimensional molded product. On the other hand, if B / H and F / H are too large, the adhesive force between the elastic mold and the dish-like container becomes strong, and it becomes difficult to bend and remove the elastic mold.

  Each moldability when the numerical values of (A) to (H) were changed was evaluated. Evaluation of moldability is an evaluation of whether the elastic mold is easily bent, the contents are excellent in releasability from the elastic mold, the molded product has no chipping or distortion, and the shape is accurately molded. (Table 2).

  Examples 1 to 3 have the best moldability, and Examples 1 to 3 have B / A of 10 to 40%, E / D of 20 to 40%, B / H of 20 to 40%, F / H falls within a numerical range of 10 to 30%.

  In Examples 4 and 5, there is no problem in moldability, but some chipping may occur in the molded product depending on variations in mass production. In Examples 4 and 5, B / A is 43% and 9%, which is out of the numerical range of 10 to 40%, and B / H is 60% and 14%, and is a numerical value of 20 to 40%. Although not within the range, E / D and F / H fall within the numerical ranges described in Examples 1 to 3 above.

  In Examples 6 and 7, there is no problem in moldability, but some chipping may occur in the molded product depending on variations in mass production. In Examples 6 and 7, E / D is 45% and 14%, which is out of the numerical range of 20 to 40%, but B / A, B / H, and F / H are in Examples 1 to 3 above. It falls within the numerical range described.

  In Examples 8 and 9, there is no problem in moldability, but some chipping may occur in the molded product depending on variations in mass production. In Examples 8 and 9, B / H is 42% and 17%, which is out of the numerical range of 20 to 40%, but B / A, E / D, and F / H are in Examples 1 to 3 above. It falls within the numerical range described.

  In Examples 10 and 11, there is no problem in moldability, but some chipping may occur in a molded product depending on variations in mass production. In Examples 10 and 11, F / H is 38% and 8%, which is out of the numerical range of 10 to 30%, but B / A, E / D, B / H, and F / H are the above examples. It falls within the numerical range described in 1 to 3.

  In Comparative Examples 1 and 2, the molded product is chipped and has poor moldability. In Comparative Examples 1 and 2, B / A, E / D, B / H, and F / H are all out of the numerical ranges described in Examples 1 to 3.

  From the above, the dimensions of each part of the elastic mold, contents, and dish-shaped container are 10 to 40% for B / A, 20 to 40% for E / D, 20 to 40% for B / H, and F / H. It is most preferable to be within the numerical range of 10 to 30%, and if it falls outside any numerical range, molding is possible, but molding defects may occur depending on variations in mass production. When all of these are out of the range, it is difficult to take out the contents from the elastic mold, and the molded product is likely to be chipped or cracked, making it difficult to obtain a molded product having a desired shape.

  Hereinafter, the formulation example of cosmetics is shown as the content shape | molded with the elastic type | mold concerning this invention.

<Prescription Example 1: Oily Eye Shadow>
(Compounding ingredients) (mass%)
α-olefin oligomer 2
Microcrystalline wax 1.5
Ceresin 6
Dimethylpolysiloxane 5
Methylphenylpolysiloxane 5
Carnauba wax 2
Glyceryl tri-2-ethylhexanoate 20
Cetyl 2-ethylhexanoate Residual sorbitan sesquiisostearate 1
Titanium oxide 3
Boron nitride 5
Mica titanium 10
Sericite 8
Cross-linked silicone powder 5
(Trefill E-506 (Toray Dow Corning Co., Ltd.))
DL-α-tocopherol acetate 0.02
D-δ-tocopherol 0.02
Bengala 0.1
Yellow iron oxide 0.2
Polyalkyl acrylate powder 15
12-hydroxystearic acid 3
Perfume
(Total) (100)

<Formulation Example 2: Oily Stick Eye Shadow>
(Compounding ingredients) (mass%)
Paraffin 11
Carnauba 1.5
Glyceryl tri-2-ethylhexanoate Residual sorbitan sesquioleate 2
Titanium oxide 3
Mica titanium 15
Mica 20
Ultramarine 2
Black iron oxide 5
Perfume
(Total) (100)

<Formulation example 3: W / O solid emulsion eye shadow>
(Compounding ingredients) (mass%)
Microcrystalline wax 3
Dimethylpolysiloxane 10
Decamethylcyclopentasiloxane 30
Polyoxyethylene / methylpolysiloxane copolymer 2
Dipropylene glycol 3
Palmitic acid 0.5
Sorbitan sesquiisostearate 1
Alkyl-modified silicone resin coated yellow iron oxide 2.5
Alkyl modified silicone resin coated bengara 3
Alkyl-modified silicone resin coated black iron oxide 1
Alkyl modified silicone resin coated ultramarine 0.5
Alkyl modified silicone resin coated talc 15
Synthetic phlogopite 10
Alkyl modified silicone resin coated Bengala coated mica titanium 10
Silicone resin powder 3
N-lauroyl-L-lysine 0.1
Tocopherol acetate 0.1
δ-tocopherol 0.1
P-Hydroxybenzoate appropriate amount Merirot extract 2
Purified water residue
(Total) (100)

<Formulation Example 4: W / O solid emulsified foundation>
(Compounding ingredients) (mass%)
Microcrystalline wax 5
Dimethylpolysiloxane 10
Decamethylcyclopentasiloxane 30
Polyoxyethylene / methylpolysiloxane copolymer 2
Dipropylene glycol 3
Palmitic acid 0.5
Sorbitan sesquiisostearate 1
Alkyl-modified silicone resin coated yellow iron oxide 3
Alkyl modified silicone resin coated bengara 1
Alkyl-modified silicone resin-coated black iron oxide Appropriate amount of alkyl-modified silicone resin-coated silicic anhydride 2
Alkyl-modified silicone resin coated titanium oxide 15
Alkyl modified silicone resin coated sericite 10
Titanium oxide Bengala coated mica 3
Cross-linked silicone powder 3
(Trefill E-506 (Toray Dow Corning Co., Ltd.))
N-lauroyl-L-lysine 0.1
Tocopherol acetate 0.1
δ-tocopherol 0.1
P-Hydroxybenzoate appropriate amount Merirot extract 2
Purified water residue
(Total) (100)

<Formulation Example 5: O / W solid emulsified foundation>
(Compounding ingredients) (mass%)
Microcrystalline wax 1
Dimethylpolysiloxane 15
Decamethylcyclopentasiloxane 2
1,3-butylene glycol 6
Candelilla Row 3
Isostearic acid 1
Ethylene glycol fatty acid ester 0.1
Lanolin fatty acid octyldodecyl 0.5
2-Alkyl-N-carboxymethyl-N-4
Hydroxyethyl imidazolinium betaine
Titanium oxide 7.5
Barium sulfate 5
Titanium oxide 7
Talc 3
Silicic anhydride 4
Cross-linked silicone powder 0.1
(Trefill E-506 (Toray Dow Corning Co., Ltd.))
Sodium metaphosphate 0.1
Hydroxypropyl-β-cyclodextrin 0.1
DL-α-tocopherol acetate 0.1
Hamamelis extract 0.1
Peonies extract 0.1
Sodium chondroitin sulfate 0.1
Sodium hyaluronate 0.1
Paraoxybenzoic acid appropriate amount Bengala appropriate amount yellow iron oxide appropriate amount black iron oxide appropriate amount xanthan gum 0.2
Sodium carboxymethylcellulose 0.2
Merirot extract 2
Purified water residue
(Total) (100)

<Formulation Example 6: Oily foundation>
(Compounding ingredients) (mass%)
α-olefin oligomer 10
Microcrystalline wax 0.5
Ceresin 5
Dimethylpolysiloxane 15
Methylphenylpolysiloxane 10
Macadamia nut oil 0.1
Carnauba 0.1
Glyceryl tri-2-ethylhexanoate 7
Cetyl 2-ethylhexanoate 10
Sorbitan sesquiisostearate 1.5
Mica 0.5
Aluminum stearate 1
Cross-linked silicone powder 8
(Trefill E-506 (Toray Dow Corning Co., Ltd.))
N-lauroyl-L-lysine 0.1
D-δ-tocopherol appropriate amount Bengala appropriate amount yellow iron oxide appropriate amount calcium alginate powder 1
Nylon powder Residual spherical silica 1
Titanium oxide 1
(Total) (100)

DESCRIPTION OF SYMBOLS 1 Elastic type 2 Dish container 3 Filling hole 4 Contents 5 Filling nozzle 6 Molded article 7 Product container 8 Frame part 9 Product container lid 10 Mirror 11 Edge circumference

Claims (7)

A flat-walled elastic mold with a frame at the periphery for molding contents with a hardness (37 ° C. measured with a card meter, pressure-sensitive shaft diameter 3 mm, load at 800 g load) of 10-20, The container is pressure-bonded into an elastic frame, and the space formed between the dish-shaped container and the elastic mold is filled with the molten content, and after the content is cooled and solidified, the elastic frame portion By bending the entire elastic mold in the opposite direction to the contents while opening the left and right , the elastic mold is gradually pulled away from the edge of the dish-shaped container to the center of the contents, and the contents molded on the dish-shaped container are removed. A flat elastic mold characterized in that it can be taken out of the elastic mold together with the dish-like container. Claim 1 flat elastic type, wherein the elastic type material of the thick flat is characterized in that it is a silicone rubber. 3. The flat elastic mold according to claim 1, wherein the thickness (B) of the thick flat elastic mold is 10 to 40% of the bottom length (A) of the elastic mold. The bottom thickness (E) of the flat elastic type is 20 to 40% of the bottom length (D) of the content to be molded. Flat elastic type. Flat according to any one of claims 1 to 4, wherein the thickness flat elastic type height (B) is 20 to 40% of the length of the base of the dish-shaped container (H) Elastic type. The width (F) of the thick and flat elastic frame is 10 to 30% of the length (H) of the bottom of the dish-shaped container, according to any one of claims 1 to 5. Flat elastic type. A method for molding a content having a hardness (measured value at 37 ° C, pressure sensitive shaft diameter 3 mm, 800 g load by a card meter) of 10 to 20 using the flat elastic mold according to any one of claims 1 to 6. The plate-shaped container is pressure-bonded in an elastic frame, the space formed between the dish-shaped container and the elastic mold is filled with the molten content, and the content is cooled and solidified. Later, the elastic mold is flexed in the opposite direction to the contents while the elastic mold frame is opened to the left and right, so that the elastic mold is gradually pulled away from the edge of the dish-shaped container to the center of the contents. A molding method comprising: taking out the contents molded into a flat elastic mold together with the dish-like container.

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