JP2010099854A - Laminated silicone molding and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated silicone molding which has a smooth, glossy surface and can express various colors, and a method for manufacturing the molding. <P>SOLUTION: The method for manufacturing the silicone molding comprises a first process S102 for manufacturing the first silicone sheet by mixing a silicone compound having a high coefficient of viscosity, pigment, and a crosslinking agent and forming the mixture in the shape of a plate, a second process S103 in which the first silicone sheet is cut, and two or more cut sheets are manufactured, a third process S105 for manufacturing the second silicone sheet by pressurizing two or more cut sheets after being laid to overlap each other, and forming them in the shape of a plate, and a fourth process S109 for molding the second silicone sheet by heating and pressurizing a prescribed amount of the sheet in a mold. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for producing a laminated silicone molded body. More specifically, the present invention relates to a laminated silicone molded body having a smooth surface and gloss and capable of expressing various colors and a method for producing the same.

  As the silicone molded body, those conventionally used in various scenes are known. For example, silicone molded bodies are used in many daily necessities such as clothing accessories such as fastener decorations and patches, bags and bag decorations and parts, shoes and shoe decorations and parts, and fancy goods. Silicone molded products are used not only for daily necessities, but also for electric / electronic parts, health maintenance / improvement aids, medical devices, and the like. These silicone molded bodies use various materials depending on their forms, and their processing methods are various. Furthermore, various designs and forms are diversified.

  As the silicone molded body, those having various colors and patterns are used according to the function, application or hobby of the molded article. These colors and patterns are formed by molding a millable silicone material, which is a mixture of a single color pigment, or by combining a mixture of a plurality of pigments. Moreover, what was shape | molded by kneading other members, for example, metal powder, a jewel, or a bead etc. is known. Containing an elastic molded body in which a plate-like piece of gloss imparting material is mixed in at least a surface region of an elastic substrate, and the plate-like piece is arranged in a direction along the surface in at least the surface region ( For example, see Patent Document 1).

  In addition, in bracelets, anklets, necklaces and other products made of silicone rubber, various color schemes can be applied, and it is possible to freely and accurately color the specified location ( For example, see Patent Document 2). Furthermore, an example of a thermoplastic resin panel excellent in design and moldability in which a decorative material is embedded so that no bubbles exist between a plurality of thermoplastic resin sheets without using an adhesive (for example, Patent Document 3). See also).

  Furthermore, the example (for example, refer patent document 4) which makes it beautiful like a lacquer ware by decorating the surface of the tableware made from melamine resin with the background pattern of the painting style by dispersion | distribution of gold powder or silver powder is also known. Furthermore, an example (for example, refer to Patent Document 5) of a decorative molded product that has an excellent depth feeling and a beautiful stone-like appearance is known. Furthermore, examples of floor mats and trunk mats which are resin molding mats suitable for vacuum molding and press molding and which impart an unprecedented color tone are known (for example, see Patent Document 6).

JP-A-55-103940 JP 2003-340855 A JP 2005-238727 A JP 2006-142710 A JP 2001-205651 A JP 2003-165372 A

  As described above, molded products such as resins have been conventionally known, but these molded products are uniformly smooth with wrinkles, unevenness and distortion (hereinafter simply referred to as “weld lines”) on the surface. It was not something. For example, as shown in FIGS. 18A and 18B, the conventional silicone molded body 100 has weld lines W on the front surface 100H and the back surface 100T. One of the causes of this weld line W is that when the pigment is mixed into the material and kneaded and kneaded, the movement of the pigment flows, and this movement appears on the molded product as the weld line W. It was an end. That is, the flow of the pigment mixed at random appears on the surface of the molded product as a weld line W.

  Another cause is that when the material is kneaded by a roll machine, turning back is performed while kneading the material. That is, since the cut material is mixed at random, this movement appears as a flow, and it appears as a weld line W on the molded product. Further, when the material kneaded by the roll machine is peeled off from the roll machine, the weld line W is similarly generated.

  In addition, conventional silicone molded products cannot produce a high-brightness metallic color with a single silicone material. For this reason, the metallic luster was unavoidable by mixing other materials such as metal. In addition, there has been no conventional silicone molded product having a structural color in which various colors can be seen according to the viewing angle. For example, for silicone molded products, colors and patterns that appear to change when tilted, such as the color of the inside of a coconut shell, compact disc, soap bubble, iridescent moth, and morpho butterfly cocoon pattern, There were no products designed with patterns.

The present invention was created in order to solve the conventional problems as described above, and achieves the following object.
An object of the present invention is to provide a laminated silicone molded article having a smooth surface and a method for producing the same. Another object of the present invention is to provide a laminated silicone molded article having a high-brightness metallic luster and a method for producing the same. Another object of the present invention is to provide a laminated silicone molded article having a structural color in which various colors can be seen depending on the viewing angle, and a method for producing the same.

The present invention takes the following means in order to achieve the object.
The method for producing a laminated silicone molded article of the present invention includes a first step of producing a first silicone sheet formed into a plate shape by mixing a silicone compound having a high viscosity, a pigment and a crosslinking agent, and the first silicone. A second step of cutting the sheet to produce two or more cut sheets (S103), and a second silicone sheet that is formed into a plate by pressurizing after the two or more of the cut sheets are overlaid. It comprises three steps and a fourth step in which the second silicone sheet is molded by heating and pressing with a predetermined amount of molding die.

  The laminated silicone molded body of the present invention 2 comprises a first step of producing a first silicone sheet formed into a plate shape by mixing a high viscosity silicone compound, a pigment and a crosslinking agent, and cutting the first silicone sheet. A second step of manufacturing two or more cut sheets, a third step of manufacturing a second silicone sheet that is formed into a plate by pressurizing after the two or more cut sheets are overlaid, and the second It is manufactured through a fourth step in which a two-silicone sheet is molded by heating and pressurizing with a predetermined amount of molding die.

  The method for producing a laminated silicone molded article according to the third aspect of the invention is to produce a single silicone sheet formed into a plate shape while mixing a silicone compound having a high viscosity, a pigment, and a crosslinking agent to give a single color. One step, a second step of mixing a high viscosity silicone compound, a pigment and a cross-linking agent to produce another color and producing another silicone sheet formed into a plate, and the one silicone sheet And a third step in which a predetermined amount of the other silicone sheet is overlaid and filled in a molding die and then heated and pressurized to be molded.

  The laminated silicone molded body of the present invention 4 is a first step for producing a single silicone sheet formed into a plate shape while mixing a high viscosity silicone compound, a pigment and a crosslinking agent to give a single color. A second step of mixing a silicone compound having a high viscosity, a pigment, and a cross-linking agent to produce another color and producing another silicone sheet formed into a plate, and the one silicone sheet and the other It is characterized by being manufactured through a third step in which a predetermined amount of a silicone sheet is overlaid and filled in a molding die and then heated and pressurized to be molded.

  The laminated silicone molded product of the present invention can be a smoothly molded laminated silicone molded product in which the formation of weld lines on the surface is suppressed. Therefore, for example, quality and design properties are improved and various products can be provided. In addition, the laminated silicone molded product of the present invention can be a laminated silicone molded product molded to have a high-brightness metallic luster. Therefore, it is possible to provide a product having a metallic luster without mixing metals or the like other than silicone.

  Moreover, since it is manufactured without mixing metals or the like, the weight of the product can be reduced, the parts manufacturing process can be simplified, the efficiency can be improved, and the economy can be improved. Furthermore, the laminated silicone molded product of the present invention can be a laminated silicone molded product molded into a structural color in which various colors can be seen depending on the viewing angle. Therefore, it has become possible to express a high-quality appearance with high designability, and the range of design possibilities has been widened.

  The method for producing a laminated silicone molded body of the present invention is a method of molding after laminating silicone sheets. Thereby, it is possible to easily produce a laminated silicone molded article having a smooth surface with a suppressed weld line, a laminated silicone molded article having a high-brightness metallic luster, and a laminated silicone molded article molded in a structural color. It became.

Embodiments of the present invention will be described with reference to the drawings.
In this embodiment, a sample sheet showing samples of colors and patterns among various silicone products will be described as an example. FIG. 1 is a plan view of a sample sheet which is a laminated silicone molded body to which the present invention is applied. FIG. 2 is a bottom view of a sample sheet which is a laminated silicone molded body to which the present invention is applied. FIG. 3 is a cross-sectional view taken along the line XX with the pattern of FIG. 1 omitted.

  As shown in FIG. 1, the laminated silicone molded object 1 is applied to the sample sheet | seat which shows the sample of a color or a pattern. The material of the laminated silicone molded body 1 is millable silicone, and has a rubbery property after curing. The millable silicone in the present embodiment is a silicone having a high viscosity before curing, and includes a vulcanizing agent and a viscosity modifier.

  Millable silicone is colored by mixing pigments. As shown in FIG.1 and FIG.2, the laminated silicone molded object 1 is colored by the color tone of gold as a whole, and is formed in plate shape. The laminated silicone molded body 1 has patterns 2a, 2b, and 2c on the front surface 1H, and the back surface 1T is plain. The patterns 2a, 2b and 2c are formed by curing a liquid silicone having a low viscosity.

  As shown in FIG. 3, the laminated silicone molded body 1 is formed by integrally stacking six sheets 1a, 1b, 1c, 1d, 1e, and 1f (hereinafter simply referred to as “1a to 1f”). ing. The six sheets 1a to 1f have the same size and are formed in a size of 35 mm in length and 28 mm in width. The laminated silicone molded body is formed to have a thickness of 1 mm in a state where six sheets 1a to 1f are stacked.

  In the present embodiment, the laminated silicone molded body 1 has been described by taking, as an example, a sample sheet that shows a sample of colors and patterns among various silicone products. However, it goes without saying that other molded products may be used. For example, clothing accessories such as fastener decorations and emblems, bags and bag decorations and parts, shoes and shoe decorations and parts, fancy miscellaneous goods, and the like may be formed from the laminated silicone molded body. Moreover, you may shape | mold the silicone adhesive plaster as health maintenance, improvement assistance, and a medical device with a laminated silicone molded object. Furthermore, it cannot be overemphasized that a molded article can be obtained as accessories, such as a bracelet, a necklace, or an anklet, with a laminated silicone molded object.

[Method for producing laminated silicone molded article]
FIG. 4 is a flow diagram showing a production process of a sample sheet by the method for producing a laminated silicone molded body of the present invention. FIG. 5 is a plan view of the first silicone sheet. FIG. 6 is a cross-sectional view of a mold filled with a laminated first silicone sheet. FIG. 7 is a cross-sectional view of a mold on which a second silicone sheet is formed. FIG. 8 is a plan view of the second silicone sheet. FIG. 9 is a plan view of a sample sheet metal mold. 10 is a cross-sectional view taken along line YY of FIG. FIG. 11 is a plan photograph and a bottom photograph of a sample sheet that is a laminated silicone molded body.

The manufacturing process will be described with reference to the flowchart shown in FIG.
The material of the sample sheet is obtained by blending a vulcanizing agent and a viscosity modifier with millable silicone, which is the main material (S101). A pigment is kneaded with millable silicone (S102). The kneaded millable type silicone is formed into a plate-like first silicone sheet.

  The first silicone sheet is cut into six sheets having approximately the same size (S103). The cut out six first silicone sheets are stacked (S104). The stacked first silicone sheets are subjected to mechanical pressure with a hydraulic press to form a second silicone sheet (S105). A predetermined amount of the second silicone sheet is cut out in accordance with the size and shape of the sample sheet (S106).

  The cut-out second silicone sheet is filled into a space (cavity) formed in the mold of the mold in order to form a sample sheet (S107). The mold is divided into an upper mold and a lower mold. After the second silicone sheet is filled, the mold is closed and assembled (S108). After closing the mold, heat treatment and pressure treatment are performed at a predetermined temperature and a predetermined pressure (S109).

  After the mold is opened and both molds are separated (S110), the molded sample sheet is taken out (S111). Remove any burrs from the sample sheet. Next, the specific manufacturing method will be described.

<Formulation (S101)>
The material of the sample sheet is obtained by blending a vulcanizing agent and a viscosity modifier with millable silicone, which is the main material. The vulcanizing agent and viscosity modifier to be blended with the millable silicone may be adjusted according to the purpose of the molded product. It should be noted that the millable silicone may be masticated to lower the viscosity so that it can be easily processed later.

  In this embodiment, millable silicone is used as the material to be kneaded. The millable silicone in this embodiment is “TSE260-7U” (trade name, manufactured by Momentive Performance Materials Japan GK), “TSE260-5U” (trade name, Momentive Performance Materials Japan GK) Or “KE581-U” (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.) or the like. The vulcanizing agent in the present embodiment is “TC-8” (trade name, manufactured by Momentive Performance Materials Japan GK), “C-25A” (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.) or “ C-25B "(trade name, manufactured by Shin-Etsu Chemical Co., Ltd.) and the like are used. However, the material to be kneaded may use products of other companies and other materials depending on the purpose and function of the molded product, and may be, for example, urea resin and melamine resin.

<Kneading (S102)>
The millable silicone is colored by being mixed with a pigment. As the pigment in the present embodiment, “NO4 LUMINA BRASS” (color name, manufactured by Badische Anilin-und Soda-Fabrik (hereinafter simply referred to as “manufactured by BASF”)) is used for coloring in a gold color tone. The In the present embodiment, 3 g of the pigment is blended with 100 g of millable silicone. However, the pigment is not limited to the above-described pigment, and metal pigments such as iron oxide-coated mica, titanium oxide-coated mica, and iron oxide-titanium-coated mica may be used depending on the color to be colored. Moreover, you may use a pigment regardless of the kind of an organic pigment and an inorganic pigment. Further, the amount of the pigment to be blended with the millable silicone may be appropriately changed according to the degree of coloring.

  The millable silicone is blended with a vulcanizing agent, a viscosity modifier and the like at a predetermined ratio, and then kneaded at a normal temperature with a kneader such as a roll machine for a predetermined time. The pigment is mixed when the millable silicone is kneaded in a roll machine. In the present embodiment, the kneading operation is performed by previously blending the vulcanizing agent. However, when a vulcanization reaction occurs during kneading, the material excluding the vulcanizing agent may be mixed in a kneader and then the temperature may be lowered, and then the vulcanizing agent may be mixed.

  In the present embodiment, since kneading aims to obtain a colorful molded product, a roll machine that can visually confirm the kneading state of the pigment is used. However, the present invention is not limited to this, and other kneader Banbury mixers or kneaders may be used.

  As shown in FIG. 5, the first silicone sheet 11 obtained in the kneading step is formed in a plate shape having a thickness of 1 mm. The first silicone sheet 11 has a weld line W on its surface. One of the causes of this weld line W is that when the pigment is mixed in the material and mixed and kneaded, the movement of the pigment flows, and this movement appears as a weld line W on the molded product. Is. That is, the flow of the pigment mixed at random appears on the molded product as a weld line W.

  Another cause of the occurrence of the weld line W is that when the material is kneaded with a roll machine, the material is cut back and kneaded while being cut. That is, since the cut material is mixed at random, this movement appears as a flow, and it appears as a weld line W on the molded product. Further, the weld line W is similarly generated when the first silicone sheet 11 is peeled off from the roll machine.

<Cutout (S103)>
The first silicone sheet 11 is cut into the same size by a punching blade, and six cut sheets 11a, 11b, 11c, 11d, 11e, and 11f (hereinafter simply referred to as “11a to 11f”) are formed. . In the present embodiment, the first silicone sheet 11 is cut into six sheets, but it is needless to say that the number is not limited to this number and may be cut into any number as long as it is a plurality of two or more sheets. .
<Lamination (S104)>
As shown in FIG. 6, the cut sheets 11 a to 11 f are respectively stacked and stacked on the lower recess 21 b of the lower mold 20 b provided in the hydraulic press. Since the cut sheets 11a to 11f have a thickness of 1 mm, they are stacked to form a laminated body having a thickness of 6 mm. The laminate formed by the cut sheets 11a to 11f is formed with the same color as gold.

<Press (S105)>
As shown in FIG. 6, a mold provided in a hydraulic press machine (not shown) is separated into an upper mold 20a and a lower mold 20b having the same configuration. The upper mold 20a is formed in a plate shape, and is formed with an upper concave portion 21a made of a space formed in a rectangular shape so as to fill an object to be filled. The lower mold 20b is formed in a plate shape, and is formed with a lower concave portion 21b composed of a space formed in a rectangular shape so as to fill an object to be filled. When the upper mold 20a and the lower mold are combined, the space formed in the upper recess 21a and the lower recess 21b is formed to have a flat plate shape with a thickness of 1 mm.

  In a state where the cut sheets 11a to 11f are stacked and stacked on the lower recess 21b, a hydraulic press machine (not shown) provided outside the upper mold 20a and the lower mold 20b is pressurized. The cutting sheets 11a to 11f are pressed by applying mechanical pressure to the upper mold 20a and the lower mold 20b.

As illustrated in FIG. 7, the cut sheets 11 a to 11 f are pressed to form the second silicone sheet 12 having a thickness of 1 mm. The stacked cut sheets 11a to 11f are pressed for 10 seconds to 60 seconds with a pressure of 196 × 10 ^{3 to} 392 × 10 ³ N (20t to 40t) in a normal temperature state. With this applied pressure, the cut sheets 11a to 11f become the second silicone sheet 12 integrated in a stacked state.

  As shown in FIG. 8, the second silicone sheet 12 is formed by laminating and pressing the cut sheets 11 a to 11 f, so that the weld line W disappears from the surface, and a smooth and high-brightness gold color plate shape is obtained. Become. This is presumed to be because the welded line W spreads and the air contained in the material escapes as the laminated cut sheets 11a to 11f are pressed and spread, so that the unity increases. The Moreover, it is estimated that the weld line W disappears because the flow of the randomly mixed pigments is aligned in a certain direction as the cut sheets 11a to 11f are pressed and spread.

  In the present embodiment, the space formed when the upper mold 20a and the lower mold 20b are combined is described as an example of a flat plate shape having a thickness of 1 mm. However, the present invention is not limited to this embodiment, and it goes without saying that it can be formed in various shapes and dimensions according to the shape of the molded product.

<Cutout (S106)>
The second silicone sheet 12 is cut into a rectangular shape having a predetermined size with a punching blade. The cut second silicone sheet 12 becomes a filling sheet 13 filled in a lower molding die 30b described later. In the present embodiment, the filling sheet 13 is cut into a size of 35 mm in length and 28 mm in width in accordance with the size of the sample sheet that is a molded product. However, since the filling sheet 13 may expand and contract in a heating process described later, the filling size may be changed according to the degree of expansion and contraction. Moreover, you may determine the shape and dimension cut out according to the shape of a molded article.

<Molding (S107)>
As shown in FIGS. 9 and 10, the molding die is separated into a molding upper die 30a and a molding lower die 30b.
The upper mold 30a for molding is formed in a plate shape, and an upper concave portion 31a is formed. The upper concave portion 31 a is a rectangular parallelepiped space formed for filling the filling sheet 13. In the present embodiment, a total of 20 upper recesses 31a are formed at equal intervals in the upper mold 30a for molding, 5 rows in 4 columns and 4 rows (not shown). The upper recess 31a is formed in a size of 35 mm in length, 28 mm in width, and 0.5 mm in depth.

  The molding lower mold 30b is formed in a plate shape, and a lower recess 31b is formed. The lower concave portion 31 b is a rectangular parallelepiped space formed for filling the filling sheet 13. In the present embodiment, a total of 20 lower recesses 31b are formed at equal intervals in the lower mold 30b for molding, with 5 horizontal rows and 4 vertical rows (not shown). The lower recess 31b is formed in a size of 35 mm in length, 28 mm in width, and 0.5 mm in depth.

  As shown in FIG. 9, pattern grooves 32a, 32b, and 32c are formed in the lower recess 31b. As shown in FIG. 1, the pattern grooves 32a, 32b, and 32c are grooves into which liquid silicone for forming the patterns 2a, 2b, and 2c of the sample sheet can be poured.

  When the upper mold 30a for molding and the lower mold 30b for molding flow at room temperature, liquid silicone having a low room temperature curing viscosity flows through the pattern grooves 32a, 32b, 32c of the lower recess 31b. The filling sheet 13 is filled in the lower recess 31b after the liquid silicone is cured. In the present embodiment, as shown in FIG. 1, the sample sheet has patterns 2 a, 2 b, and 2 c with certain characters and frames. The sample sheet uses white liquid silicone for the patterns 2a, 2b and 2c appearing on the surface 1H. However, the present invention is not limited thereto, and it goes without saying that the shape of the pattern groove 32a, the color of the liquid silicone, and the like may be appropriately changed according to the molded product.

<Assembly (S108)>
After the filling sheet 13 is positioned by a positioning member including positioning pins, positioning holes, etc., the mold is closed. That is, the upper mold 30a and the lower mold 30b are assembled after being aligned.

<Heating and pressurizing (S109)>
When the upper mold 30a for molding and the lower mold 30b for molding are assembled, and a heated press device (not shown) provided outside is heated and further pressurized, the filling sheet 13 is pressed. The In the present embodiment, the heating temperature is 80 ° C., and the force is formed with a pressure of 196 × 10 ^{3 to} 392 × 10 ³ N (20t to 40t). The time for heating and pressurizing is preferably about 10 to 60 seconds. With this heating and pressure, the filling sheet 13 is molded to form the laminated silicone molded body 1 as shown in FIG. 1 or FIG. In addition, you may change suitably the temperature and force of a heating and pressurization according to a material and a molded article. Moreover, you may change suitably the time to heat and pressurize according to a material and a molded article.

<Mold separation (110)>
After the laminated silicone molded body 1 is formed in the mold, the molding upper mold 30a and the molding lower mold 30b are separated and opened.

<Removal (S111)>
The laminated silicone molded body 1 solidified and molded from the mold is taken out. At this time, if extra burrs or the like have occurred, the burrs should be removed.

  Through the above manufacturing process, as shown in FIGS. 11A and 11B, the laminated silicone molded body 1 forms a smooth laminated body having no weld line W on the front surface 1H and the back surface 1T. Is done. Comparing the conventional silicone molded body 100 of FIG. 18 with the laminated silicone molded body 1 of FIG. 11, it is clear that there are no weld lines W on the front surface 1H and the back surface 1T. The laminated silicone molded body 1 expresses a high-luminance metal color by laminating six sheets of the same gold color tone.

  As described above, in the present embodiment, the sample sheet has been described on the assumption that it is made of millable silicone, but other materials such as urea resin and melamine resin may be used.

  In addition, in this Embodiment, the manufacturing method of the laminated silicone molded object 1 demonstrated the sheet | seat for a sample which shows the sample of a color and a pattern among various silicone products as an example. However, it goes without saying that other molded products may be manufactured. For example, clothing accessories such as fastener decorations and emblems, bags and bag decorations and parts, shoes and shoe decorations and parts, fancy miscellaneous goods, and the like may be formed from the laminated silicone molded body.

[Embodiment 2]
A second embodiment of the present invention will be described with reference to the drawings. In the second embodiment, the same reference numerals are given to the same parts as those in the above-described embodiment, and detailed description thereof is omitted.
In the second embodiment, a sample sheet showing samples of colors and patterns among various silicone products will be described as an example. FIG. 12 is a plan view of a sample sheet that is a laminated silicone molded body to which Embodiment 2 of the present invention is applied. FIG. 13 is a bottom view of a sample sheet that is a laminated silicone molded body to which Embodiment 2 of the present invention is applied. FIG. 14 is a cross-sectional view taken along line X2-X2, omitting the pattern of FIG.

  The material of the laminated silicone molded body 201 is millable silicone, which is colored by mixing pigments. As shown in FIGS. 12 and 13, the laminated silicone molded body 201 is formed in a plate shape with the front surface 201 </ b> H colored in a pearl color tone and the back surface 201 </ b> T colored in a metallic color tone.

  As shown in FIG. 14, the laminated silicone molded body 201 is formed by integrally laminating two sheets 201a and 201b. The two sheets 201a and 201b have the same size and are formed in a size of 35 mm in length and 28 mm in width. The sheet 201a is colored in a pearl tone. The sheet 201b is colored in a metallic color tone. The laminated silicone molded body is formed with a thickness of 1 mm in a state where two sheets 201a and 201b are stacked.

  In the second embodiment, the laminated silicone molded body 201 expresses a shell-like color in which the pattern changes depending on the viewing angle by laminating two sheets of different colors. That is, the laminated silicone molded body 201 has a shell-like color in which the pattern changes depending on the viewing angle, because the sheet 201a is colored in a transparent pearl tone and the sheet 201b is colored in a transparent metallic tone. Is expressed.

  This is presumed that the laminated silicone molded body 201 is a kind of structural color in which interference of light is caused by the multilayer film because silicone is laminated. In other words, because the layer made of silicone is layered on several layers, the way of light incidence and reflection interference changes depending on the number and combination of each layer, and various colors and patterns depending on the viewing angle, It is estimated that the color of the shell is changing.

  In the second embodiment, the laminated silicone molded body 201 is formed in a plate shape with the front surface 201H colored in a pearl color tone and the back surface 201T colored in a metallic color tone. However, it goes without saying that other colors may be formed by coloring. The laminated silicone molded body 201 is formed by laminating two different sheets. However, the number of sheets to be stacked is not limited to two and may be formed by stacking more sheets. Moreover, when laminating a plurality of sheets, sheets of the same color may be included in the sheets. For example, a single sheet having a metallic color tone and a plurality of sheets having a high transparency to transmit light may be stacked.

[Method 2 for producing laminated silicone molded product]
FIG. 15 is a flowchart showing a manufacturing process of a sample sheet by the method for manufacturing a laminated silicone molded body according to the second embodiment. FIG. 16 is a cross-sectional view of the mold.

The manufacturing process will be described with reference to the flowchart shown in FIG.
The material of the surface of the sample sheet is obtained by blending a vulcanizing agent and a viscosity modifier with millable silicone, which is the main material (S301). A pigment for making a pearl color tone is kneaded with millable silicone (S302). The kneaded millable type silicone is formed into a plate-like pearl sheet.

  The material of the back surface of the sample sheet is obtained by blending a vulcanizing agent and a viscosity modifier with millable silicone, which is the main material (S303). A pigment for making a metallic color tone is kneaded with millable silicone (S304). The kneaded millable silicone is formed into a plate-like metallic color sheet.

  The pearl color sheet is cut into a cut pearl color sheet having a predetermined size according to the size and shape of the sample sheet. The metallic color sheet is cut into a cut metallic color sheet having a predetermined size in accordance with the size and shape of the sample sheet (S305).

  The cut pearl color sheet is filled in a space (cavity) formed in the mold of the mold in order to mold the sample sheet, and the cut metallic color sheet is overlaid on the space (S306). The mold is divided into an upper mold and a lower mold. After filling the cut pearl color sheet and the cut metallic color sheet, the mold is closed and assembled (S307). After the mold is closed, heat treatment and pressure treatment are performed at a predetermined temperature and a predetermined pressure (S308).

  After the mold is opened and both molds are separated (S309), the molded sample sheet is taken out (S310). Remove any burrs from the sample sheet. Next, the specific manufacturing method will be described.

<Formulation (S301)>
Since the step of blending (S301) is the same as the step of blending (S101) in the method for producing a laminated silicone molded body described above, description thereof is omitted.
<Kneading (S302)>
The millable silicone is colored by being mixed with a pigment. As the pigment in the present embodiment, “NO2 LUMINA AQUA BLUE” (name of color, manufactured by BASF) is used for coloring in a pearl tone. In the present embodiment, 3 g of the pigment is blended with 100 g of millable silicone. You may change suitably the quantity of the pigment mix | blended with millable type silicone according to the degree of coloring. The kneading (S302) step is the same as the kneading (S102) step of the method for producing a laminated silicone molded body described above, and thus the description thereof is omitted. Millable silicone is subjected to a kneading step to form a plate-like pearl-colored sheet having a thickness of 0.5 mm.

<Formulation (S303)>
Since the step of blending (S303) is the same as the step of blending (S101) in the method for producing a laminated silicone molded body described above, description thereof is omitted.
<Kneading (S304)>
The millable silicone is colored by being mixed with a pigment. As the pigment in the present embodiment, “NO16 Luminara Set 9459D” (name of color, manufactured by BASF) is used to color the metallic tone. In the present embodiment, 3 g of the pigment is blended with 100 g of millable silicone. You may change suitably the quantity of the pigment mix | blended with millable type silicone according to the degree of coloring. The kneading (S304) step is the same as the kneading (S102) step of the method for producing a laminated silicone molded body described above, and thus the description thereof is omitted. Millable silicone forms a plate-like metallic color sheet having a thickness of 0.5 mm through a kneading process.

<Cutout (S305)>
The pearl color sheet is cut into a rectangular shape having a predetermined size with a punching blade. The cut pearl color sheet becomes a filled pearl color sheet 213b filled in a molding lower mold 430b described later. In the present embodiment, the filled pearl color sheet 213b is cut to a size of 35 mm in length and 28 mm in width in accordance with the size of the sample sheet that is a molded product. However, since the filled pearl color sheet 213b may expand and contract in the heating step described later, the filling size may be changed depending on the degree of expansion and contraction.

  The metallic color sheet is cut into a rectangular shape having a predetermined size with a punching blade. The cut metallic color sheet becomes a filled metallic color sheet 213a filled in a molding lower mold 430b described later. In the present embodiment, the filled metallic color sheet 213a is cut into a size of 35 mm in length and 28 mm in width in accordance with the size of the sample sheet that is a molded product. However, since the filled metallic color sheet 213a may expand and contract in a heating process described later, the filling size may be changed depending on the degree of expansion and contraction.

<Molding (S306)>
As shown in FIG. 16, the molding die is separated into a molding upper die 430a and a molding lower die 430b. The configuration of the upper recess 431a provided in the molding upper mold 430a is the same as the configuration of the upper recess 31a provided in the molding upper mold 30a described above, and a description thereof will be omitted. The configuration of the lower concave portion 431b provided in the molding lower mold 430b is the same as the configuration of the lower concave portion 31b provided in the molding lower mold 30b described above, and thus the description thereof is omitted.

  As shown in FIG. 16, the upper mold for molding 430a and the lower mold for molding 430b fill the lower concave portion 431b with the filled pearl sheet 213b in the state of normal temperature. Then, the filled metallic color sheet 213a is overlaid on the filled pearl color sheet 213b.

  In the present embodiment, the lower concave portion 431b is filled with the filled pearl color sheet 213b, and the filled metallic color sheet 213a is overlaid thereon. However, the present invention is not limited to this, and the lower concave portion 431b may be filled with the filled pearl color sheet 213b, and the upper concave portion 431a may be filled with the filled metallic color sheet 213a. In this case, it is preferable that the filling metallic color sheet 213a is formed to have a size larger than the size of the upper recess 431a and can be filled by fitting.

<Assembly (S307)>
The process of assembly (S307) is the same as the process of assembly (S108) of the method for producing a laminated silicone molded body described above, and thus the description thereof is omitted.
<Heating and pressurizing (S308)>
With the upper mold 430a and the lower mold 430b being assembled, when a heated press device (not shown) provided outside is heated and further pressurized, the filled pearl color sheet 213b and The filled metallic color sheet 213a is pressed. In this embodiment mode, the heating temperature is 80 ° C., and the applied pressure is 196 × 10 ^{3 to} 392 × 10 ³ N (20t to 40t). The heating and pressurizing time is preferably about 5 to 10 minutes.

By this heating and pressing force, the filled pearl color sheet 213b and the filled metallic color sheet 213a are integrally molded to form a laminated silicone molded body 201 as shown in FIG. In this embodiment mode, the heating temperature is 80 ° C., and the applied pressure is 196 × 10 ^{3 to} 392 × 10 ³ N (20t to 40t). The heating and pressurizing time is preferably about 5 to 10 minutes. In addition, you may change suitably the temperature and force of a heating and pressurization according to a material and a molded article. Moreover, you may change suitably the time to heat and pressurize according to a material and a molded article.

<Mold separation (309)>
After the laminated silicone molded body 201 is formed in the mold, the molding upper mold 430a and the molding lower mold 430b are separated and opened.

<Removal (S310)>
The laminated silicone molded body 201 formed by solidifying from the mold is taken out. At this time, if extra burrs or the like have occurred, the burrs should be removed.

  Through the above manufacturing process, the laminated silicone molded body 201 is formed into a laminated body in which a shell-like color is expressed. The laminated silicone molded body 201 expresses a shell-like color in which the pattern changes depending on the viewing angle by laminating two sheets of different colors. That is, the laminated silicone molded body 201 expresses a shell-like color in which the pattern changes depending on the viewing angle by the sheet 201a being colored in a pearl color and the sheet 201b in a metallic color.

  In the present embodiment, “NO2 LUMINA AQUA BLUE” (name of color, manufactured by BASF) is used as a pigment in order to color the surface in the color of pearl. Further, in order to color the back surface 201 in a metallic color tone, “NO16 Luminara Set 9459D” (color name, manufactured by BASF) is used as a pigment. However, it is needless to say that the present invention is not limited to these colors, and may be combined with other colors.

  For example, “NO1 LUMINA TURQUISE”, “NO2 LUMINA AQUA BLUE”, “NO3 MEARLIN SPARKLE BRASS”, “NO4 LUMINA BRASS”, “NO5 VEGETABLE BLACK ILU”, “NO5 VGETABLE BLACK MOVE” No matter how you combine pigments such as “LITE SPARKLE GOLD”, “NO12 LUMINA GOLD”, “NO13 Marlin Magna Pearl”, “NO14 Marlin Mayang Gold” or “NO15 MEARLIN SPARKLE VIOLET”, “NO16 Luminar Set 9459D” It goes without saying that it is good. In addition, pigments of colors such as “FP-115”, “FP-1050”, “FP-1007”, “FP-3000” and “FP-112” manufactured by Nippon Shokubai Co., Ltd. may be combined in any way. Needless to say.

[Method 3 for producing laminated silicone molded article]
FIG. 17 is a flowchart showing the manufacturing process of the sample sheet by the manufacturing method 3 of the laminated silicone molded body.
The material of the sample sheet is obtained by blending a vulcanizing agent and a viscosity modifier with millable silicone as a main material (S501). A pigment is kneaded with millable silicone (S502). The kneaded millable type silicone is formed into a plate-like first silicone sheet.

  The first silicone sheet is cut into a plurality of sheets having substantially the same size (S503). The cut out first silicone sheet is filled into a space (cavity) formed in the mold of the mold in order to form a sample sheet (S504). The mold is divided into an upper mold and a lower mold. After the first silicone sheet is filled, the mold is closed and assembled (S505). After the mold is closed, heat treatment and pressure treatment are performed at a predetermined temperature and a predetermined pressure (S506).

  After the mold is opened and both molds are separated (S507), the molded sample sheet is taken out (S508). Remove any burrs from the sample sheet. The other manufacturing method 2 of the laminated silicone molded body does not perform the laminating step (S104) and the pressing step (S105) in the above-described manufacturing method of the laminated silicone molded body, and weld line W in accordance with molding with a molding die. Manufactures molded articles that disappear.

  While various embodiments of the present invention have been described above, the present invention is not limited to these embodiments. Needless to say, changes can be made without departing from the scope and spirit of the present invention. For example, it is needless to say that the design properties may be improved by putting metal pieces, beads, jewelry, lame, etc. in the laminated silicone molded body. In addition, a magnet material, a metal material such as germanium or titanium can be enclosed or partially exposed to the outside in the laminated silicone molded body. It goes without saying that the laminated silicone molded body formed in this way can be used for health maintenance, improvement assistance, silicone adhesive bandages, bracelets, necklaces and anklets as medical devices.

FIG. 1 is a plan view of a sample sheet which is a laminated silicone molded body to which the present invention is applied. FIG. 2 is a bottom view of a sample sheet which is a laminated silicone molded body to which the present invention is applied. FIG. 3 is a cross-sectional view taken along the line XX with the pattern of FIG. 1 omitted. FIG. 4 is a flow diagram showing a production process of a sample sheet by the method for producing a laminated silicone molded body of the present invention. FIG. 5 is a plan view of the first silicone sheet. FIG. 6 is a cross-sectional view of a mold filled with a laminated first silicone sheet. FIG. 7 is a cross-sectional view of a mold on which a second silicone sheet is formed. FIG. 8 is a plan view of the second silicone sheet. FIG. 9 is a plan view of a sample sheet metal mold. 10 is a cross-sectional view taken along line YY of FIG. FIG. 11 is a plan photograph and a bottom photograph of a sample sheet that is a laminated silicone molded body. FIG. 12 is a plan view of a sample sheet that is a laminated silicone molded body to which Embodiment 2 of the present invention is applied. FIG. 13 is a bottom view of a sample sheet that is a laminated silicone molded body to which Embodiment 2 of the present invention is applied. FIG. 14 is a cross-sectional view taken along line X2-X2, omitting the pattern of FIG. FIG. 15: is a flowchart which shows the manufacturing process of the sheet | seat for samples by the manufacturing method 2 of the laminated silicone molded object of this invention. FIG. 16 is a cross-sectional view of the mold. FIG. 17: is a flowchart which shows the manufacturing process of the sheet | seat for samples by the manufacturing method 3 of the laminated silicone molded object of this invention. FIG. 18 is a plan photograph and a bottom photograph of a conventional silicone molded body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Laminated silicone molded object 1a-1f ... Sheet

Claims (4)

A first step (S102) for producing a first silicone sheet which is formed into a plate by mixing a high viscosity silicone compound, a pigment and a crosslinking agent;
A second step of cutting the first silicone sheet to produce two or more cut sheets (S103);
A third step (S105) for producing a second silicone sheet that is formed into a plate by pressure treatment after two or more of the cut sheets are stacked;
A method for producing a laminated silicone molded body, comprising: a fourth step (S109) in which the second silicone sheet is molded by heating and pressurizing with a predetermined amount of a molding die. A first step (S102) for producing a first silicone sheet which is formed into a plate by mixing a high viscosity silicone compound, a pigment and a crosslinking agent;
A second step of cutting the first silicone sheet to produce two or more cut sheets (S103);
A third step (S105) for producing a second silicone sheet that is formed into a plate by pressure treatment after two or more of the cut sheets are stacked;
A laminated silicone molded body characterized by being manufactured through a fourth step (S109) in which the second silicone sheet is molded by heating and pressurizing with a predetermined amount of molding die. A first step (S302) for producing a single silicone sheet formed into a plate shape by mixing a high viscosity silicone compound, a pigment and a cross-linking agent into a single color;
A second step (S304) of mixing a high viscosity silicone compound, a pigment and a cross-linking agent to produce another silicone sheet that is colored in another color and formed into a plate shape;
A laminated silicone comprising: a third step (S308) in which the one silicone sheet and another silicone sheet are superposed on and filled in a predetermined amount of molding die, and then molded by heating and pressing. Manufacturing method of a molded object. A first step (S302) for producing a single silicone sheet formed into a plate shape by mixing a high viscosity silicone compound, a pigment and a cross-linking agent into a single color;
A second step (S304) of mixing a high viscosity silicone compound, a pigment and a cross-linking agent to produce another silicone sheet that is colored in another color and formed into a plate shape;
It is manufactured through a third step (S308) in which the one silicone sheet and another silicone sheet are superposed and filled in a predetermined amount on a molding die and then heated and pressurized to be molded. Laminated silicone molded body.