JP5662666B2 - Decorative part and method for producing decorative part - Google Patents

Description

 The present invention relates to a decorative part exhibiting a metal mirror surface and a method for manufacturing the decorative part.

Conventionally, by providing a metal layer on the back surface side of a transparent member, a decorative part that exhibits a metal mirror surface when viewed from the front surface is known.
Here, in Patent Document 1, a transparent base coat layer is formed on the back surface of the transparent member, a metal layer is formed on the base coat layer, a transparent top coat layer is formed on the metal layer, and the top coat layer is formed on the top coat layer. A method of manufacturing a decorative part that forms an opaque layer is disclosed.
Both the front and back surfaces of the transparent member are formed to be smooth surfaces, and the metal layer is formed along the back surface and base coat layer of the transparent member by metal vapor deposition or the like. The surface is mirror-like. Therefore, the decorative part exhibits a metal mirror surface when viewed from the surface of the transparent member.

 There is also known a decorative component that applies a synthetic resin paint (so-called metallic paint) containing a metal piece to the back surface of a transparent member and exhibits a metallic tone when viewed from the surface of the transparent member.

JP 2002-212324 A (page 5, FIG. 1)

However, the decorative part manufactured by the method disclosed in Patent Document 1 has a base coat layer and a top coat layer for protecting the metal layer. There is a problem that a certain defective product is generated in the process and the yield of the whole manufacturing is lowered.
Further, when the base coat layer or the top coat layer is deteriorated due to aging or the like, there is a problem that water or the like enters the metal layer and the metal layer is corroded.

 On the other hand, when a decorative part is manufactured by applying a synthetic resin paint containing a metal piece to the back surface of the transparent member, the metal piece is buried in the synthetic resin layer of the paint without regularity after the paint is dried. Therefore, when light is incident from the surface of the transparent member, most of the light is diffusely reflected by the synthetic resin layer of the paint, and when viewed from the surface of the transparent member, there is a problem that the metallic tone is exhibited but the metal mirror surface is not formed. .

 The present invention has been made in view of such circumstances, and it is an object of the present invention to improve a manufacturing yield, and to provide a decorative part having a metallic mirror surface shape that is unlikely to cause corrosion over a long period of time.

In order to solve the above problems, the present invention employs the following means.
The decorative component of the present invention has a transparent member formed so that the back surface thereof is a smooth surface, and a transparent synthetic resin layer provided on the back surface of the transparent member, and at least the inside of the transparent synthetic resin layer On the transparent member side, a plurality of foil-like metal pieces are respectively covered and buried in the transparent synthetic resin in a posture substantially parallel to the back surface of the transparent member, and the total mass of the foil-like metal pieces is the transparent synthetic resin layer The composition of 5% to 50% of the total mass of the transparent synthetic resin forming the film is employed.

 In order to manufacture the decorative part of the present invention adopting such a configuration, first, the transparent member is molded so that the back surface thereof is a smooth surface. Next, a transparent synthetic resin paint containing a plurality of foil-like metal pieces is applied to the back surface of the transparent member. Further, while drying the transparent synthetic resin coating, at least the foil-like metal pieces located on the transparent member side are oriented in a posture substantially parallel to the back surface of the transparent member.

As a result, in the decorative part of the present invention, the conventional process of forming the base coat layer, the metal layer and the top coat layer can be replaced with one process of applying the transparent synthetic resin paint. In the decorative part of the present invention, the foil-shaped metal piece after the paint is dried is coated with a transparent synthetic resin. Furthermore, in the decorative component of the present invention, when light is incident from the surface of the transparent member, most of the light is specularly reflected on the foil-like metal piece in the transparent synthetic resin, and the reflection direction is substantially constant.
The amount of the transparent synthetic resin is sufficient to cover the foil-like metal piece. Therefore, after the paint is dried, the foil-like metal pieces are each coated with a transparent synthetic resin.

Moreover, the structure that the foil thickness of the foil-shaped metal piece in the decorative part of this invention is 500 mm or less is employ | adopted.
In the decorative part of the present invention adopting such a configuration, the foil-like metal piece is formed with a very thin foil thickness of 500 mm or less, so the solvent in the paint evaporates when the paint is dried, and the coating film gradually By thinning, the foil-like metal piece is subjected to a force for orienting it in a posture substantially parallel to the back surface of the transparent member. As a result, after drying the paint, the foil-like metal pieces are oriented and fixed in a posture substantially parallel to the back surface of the transparent member.

Moreover, the structure that the full length of the foil-shaped metal piece in the decorative component of this invention is 20 micrometers or less is employ | adopted.
In the decorative part of the present invention adopting such a configuration, the foil-shaped metal piece is formed with a very small total length of 20 μm. Therefore, when the transparent synthetic resin paint is not dried, the posture of the foil-like metal piece is the paint. Can change freely within.

In addition, the transparent member in the decorative part of the present invention adopts a configuration made of a synthetic resin.
In the present invention employing such a configuration, the decorative part can have higher durability against impacts than, for example, glass.

The method for producing a decorative part of the present invention includes a molding step of molding a transparent member so that the back surface thereof is a smooth surface, and a plurality of metal foil pieces on the back surface of the transparent member from 5% to 50% of the total mass. An application step of applying the transparent synthetic resin paint to be contained, and the transparent synthetic resin paint is dried in a posture in which each of the foil-like metal pieces positioned at least on the transparent member side is substantially parallel to the back surface of the transparent member while drying. And a drying step in which the synthetic resin is coated and oriented so as to be buried .
In the present invention employing such a method, the conventional process of forming the base coat layer, the metal layer and the top coat layer can be replaced with one process of applying the transparent synthetic resin paint. In the present invention, the foil-like metal piece after the paint is dried is coated with a transparent synthetic resin. Furthermore, in the present invention, when light is incident from the surface of the transparent member, most of the light is specularly reflected on the foil-like metal piece in the transparent synthetic resin, and the reflection direction is substantially constant.
The amount of the transparent synthetic resin is sufficient to cover the foil-like metal piece. Therefore, after the paint is dried, the foil-like metal pieces are each coated with a transparent synthetic resin.

According to the present invention, the following effects can be obtained.
According to the present invention, since the conventional three manufacturing processes can be replaced with one process, the number of defective products generated in each process can be reduced. Therefore, according to the present invention, there is an effect that the yield in manufacturing can be improved.
Further, according to the present invention, since the foil-like metal piece is coated with the transparent synthetic resin, there is an effect that the corrosion hardly occurs for a long time.
Furthermore, according to the present invention, by applying a transparent synthetic resin paint containing a foil-like metal piece, there is an effect that a decorative part exhibiting a metal mirror surface shape when viewed from the surface can be produced.

It is a front view of radiator grill 1 in the 1st and 2nd embodiments of the present invention. It is a front view of the decorative component 10 in the first embodiment of the present invention. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. FIG. 4 is an enlarged view of a region K in FIG. 3. It is the schematic which shows the manufacturing method of the decorative component 10 in the 1st Embodiment of this invention. It is a front view of the 2nd component 20 for decoration in the 2nd Embodiment of this invention. FIG. 7 is a cross-sectional view taken along line AA in FIG. 6.

[First Embodiment]
The configuration of the decorative component 10 in the present embodiment will be described based on the drawings.
First, the structure of the radiator grille 1 to which the decorative component 10 is attached will be described with reference to FIG.
FIG. 1 is a front view of a radiator grill 1 according to the first embodiment of the present invention.
The radiator grill 1 is a vehicle structural body provided on the front surface of the vehicle, and includes a plurality of members extending in the horizontal direction and a plurality of members extending in the vertical direction. Further, the radiator grill 1 is provided with a decorative part 10 at the center of the front surface thereof.

Next, the configuration of the decorative component 10 will be described with reference to FIGS.
2 is a front view of the decorative component 10 according to the first embodiment of the present invention, FIG. 3 is a cross-sectional view taken along line AA in FIG. 2, and FIG. 4 is an enlarged view in a region K in FIG. . In FIG. 3 and FIG. 4, the scale of each component is appropriately changed for description.

As shown in FIG. 2, the decorative component 10 includes a metal portion 10 </ b> A that exhibits a metal mirror surface shape when viewed from the surface, and a black portion 10 </ b> B that exhibits black.
As shown in FIG. 3, the decorative component 10 includes a transparent member 11, a first colored coating layer 12, a metal coating layer (transparent synthetic resin layer) 13, and a second colored coating layer 14 from the front side to the back side. The adhesive layer 15 and the base member 16 are sequentially arranged and integrally provided.

The transparent member 11 is a plate-like member that has a substantially rectangular shape when viewed from the front surface side, and a portion corresponding to the metal portion 10A on the back surface is recessed on the front surface side. The transparent member 11 is formed of a transparent synthetic resin such as polycarbonate or acrylic.
Both the front surface and the back surface of the transparent member 11 are formed to be smooth surfaces, and the surface is subjected to a so-called hard coat treatment that improves durability against scratching and prevents the occurrence of scratches.

 The first colored coating layer 12 is formed by applying a black synthetic resin paint to a portion corresponding to the black portion 10 </ b> B on the back surface of the transparent member 11. For this coating operation, screen printing or the like is used. In addition, the color of the coating material used for the 1st colored coating layer 12 may be colors other than black.

 The metal coating layer 13 is formed on the back surface of the transparent member 11 corresponding to the metal portion 10A and the back surface of the first colored coating layer 12 with a thickness of 1.0 μm or less, and a plurality of foil shapes are formed in the transparent synthetic resin 13S. The metal piece M is buried. In addition, the metal coating layer 13 is formed by drying the coating film of the transparent synthetic resin coating 13L (refer FIG.5 (c)) containing the some foil-shaped metal piece M. FIG.

The foil-like metal piece M is formed of aluminum (Al), the foil thickness is about 300 mm (= 0.03 μm), and the total length is 10 μm or less. Moreover, the foil-shaped metal piece M is formed using processes, such as metal vapor deposition, and the surface has a mirror surface shape. In addition, the total mass of the foil-like metal piece M is 5% to 50% of the total mass of the transparent synthetic resin 13S.
As shown in FIG. 4, the foil-like metal pieces M on the transparent member 11 side in the metal coating layer 13 are each embedded in the transparent synthetic resin 13 </ b> S in a posture that is substantially parallel to the back surface of the transparent member 11. On the other hand, on the side opposite to the transparent member 11 in the metal coating layer 13, at least a part of the foil-like metal piece M is buried in the transparent synthetic resin 13S without regularity.

 The second colored coating layer 14 is used for adjusting the color tone in the metal part 10 </ b> A and protecting the metal coating layer 13, and is formed by applying a gray black synthetic resin paint on the back surface of the metal coating layer 13. In addition, the color of the coating material used for the 2nd colored coating layer 14 may be colors other than gray black.

 The adhesive layer 15 is formed on the back surface of the second colored coating layer 14 to strengthen the connection between the second colored coating layer 14 and the base member 16. For the adhesive layer 15, a hot-melt adhesive that lowers the viscosity by heating is used.

 The base member 16 is made of a synthetic resin such as ABS (acrylonitrile / butadiene / styrene copolymer synthetic resin) or AES (acrylonitrile / ethylene / styrene copolymer synthetic resin), and is formed from the first colored coating layer 12 in the mold apparatus. The transparent member 11 having the adhesive layer 15 formed thereon is inserted and formed on the back surface of the adhesive layer 15 using injection compression molding or the like. The base member 16 has an attachment piece 16A for attaching the decorative part 10 to the radiator grill 1, and the attachment piece 16A has a shape protruding in the vertical direction from the back side of the decorative part 10. .

Then, the manufacturing method of the decorative component 10 of this embodiment is demonstrated based on FIG.
FIG. 5 is a schematic view showing a method of manufacturing the decorative component 10 in the first embodiment of the present invention.
The manufacturing method of the decorative component 10 in the present embodiment includes a first forming step (forming step) for forming the transparent member 11, a first applying step for forming the first colored coating layer 12, and a foil-like metal piece M. A second application step (application step) for applying the transparent synthetic resin coating 13L to be contained, a drying step for drying the transparent synthetic resin coating 13L to form the metal coating layer 13, and a third for forming the second colored coating layer 14 A coating process; a fourth coating process for forming the adhesive layer 15; and a second molding process for molding the base member 16.
Hereinafter, each step will be described.

First, as shown in FIG. 5A, the transparent member 11 is formed.
The transparent member 11 is molded using injection molding, injection compression molding, or the like, and both the front surface and the back surface are molded to be smooth surfaces. After molding, the surface of the transparent member 11 is subjected to a hard coat process.

Next, as shown in FIG.5 (b), the 1st colored coating layer 12 is formed.
A black synthetic resin paint is applied to a portion corresponding to the black portion 10B on the back surface of the transparent member 11 by screen printing or the like. The first colored coating layer 12 is formed by drying the black synthetic resin paint.

Next, as shown in FIG.5 (c), the transparent synthetic resin coating 13L containing the foil-shaped metal piece M is apply | coated.
A transparent synthetic resin coating 13L containing a foil-like metal piece M is applied to the entire back surface of the transparent member 11 by spray coating or the like. The composition of the coating 13L is 98% of the total solvent and 2% of the content in the solvent by mass ratio, the foil-shaped metal piece M is 5% to 50% of the content, and the other is the transparent synthetic resin 13S. It has become. The coating film at the time of application of the coating 13L is approximately 20 μm.
In the present embodiment, the paint 13L has a mass ratio of 98% of the solvent, the viscosity of the paint 13L is low, and the foil-like metal piece M is finely formed. Can freely change its posture in the paint 13L.

Next, as shown in FIG. 5D, the transparent synthetic resin paint 13L is dried.
The paint 13L is dried in a dry environment (for example, in an environment of 70 ° C. for 10 minutes). Here, since the foil-shaped metal piece M is formed with a very thin foil thickness of 300 mm, the solvent in the paint 13L evaporates by drying, and the coating film becomes thinner and the back surface of the transparent member 11 is a smooth surface. Therefore, a force for orienting the foil-like metal piece M in a posture substantially parallel to the back surface of the transparent member 11 acts on the foil-like metal piece M. As a result, after the coating 13L is dried, the foil-like metal pieces M are oriented and fixed in a posture substantially parallel to the back surface of the transparent member 11.
In addition, due to the presence of the transparent member 11, the force for orienting works more strongly on the transparent member 11 side than on the opposite side, and the foil-shaped metal piece M located on the transparent member 11 side is more than the one located on the opposite side. It is oriented in a posture parallel to the transparent member 11.

The metal coating layer 13 is formed by drying the paint 13L. The foil-like metal pieces M in the metal coating layer 13 are each covered with a transparent synthetic resin 13S.
Note that the second application step of applying the transparent synthetic resin paint 13L and the drying step may be performed a plurality of times.

Next, as shown in FIG.5 (e), the 2nd colored coating layer 14 is formed.
A grayish black synthetic resin paint is applied to the entire back surface of the metal coating layer 13 by spray coating or the like. The second colored coating layer 14 is formed by drying the gray-black synthetic resin paint.

Next, an adhesive layer 15 is formed as shown in FIG.
An adhesive is applied to the entire back surface side or a part of the second colored coating layer 14 to form the adhesive layer 15.

Finally, as shown in FIG. 5G, the base member 16 is formed.
The transparent member 11 formed with the first colored coating layer 12 to the adhesive layer 15 is inserted into the mold apparatus, and the base member 16 is formed on the back surface side of the adhesive layer 15 using injection molding or injection compression molding. The
This completes the production of the decorative component 10 of the present embodiment.

Subsequently, a reflection operation of light incident on the metal part 10A from the surface side of the decorative component 10 will be described.
When light is incident on the metal portion 10A from the surface side of the decorative component 10, the light passes through the transparent member 11 and reaches a portion where the foil-like metal piece M in the metal coating layer 13 is buried. Here, since the surface of the foil-like metal piece M is formed in a mirror shape and the plurality of foil-like metal pieces M are oriented in directions substantially parallel to the back surface of the transparent member 11, the incident light is a foil. The surface of the metal piece M is specularly reflected, and the reflection direction is substantially constant. Therefore, the surface side of the metal portion 10A has a metal mirror surface.

 Part of the incident light passes through the portion where the foil-like metal piece M is buried and reaches the second colored coating layer 14. However, the second colored coating layer 14 is grayish black, and most of the incident light transmitted through the portion where the foil-like metal piece M is buried is absorbed by the second colored coating layer 14 and the second colored coating layer. Only a small amount of light is reflected at 14. Further, since the reflected light has no saturation (achromatic color), the reflected light has little influence on the color tone of the metal portion 10A.

Therefore, according to the present embodiment, the following effects can be obtained.
According to the present embodiment, since the conventional three manufacturing processes can be replaced with one process, the number of defective products generated in each process can be reduced. Therefore, according to this embodiment, there is an effect that the yield in manufacturing can be improved.
Moreover, according to this embodiment, since the foil-shaped metal piece M is coat | covered with the transparent synthetic resin 13S, there exists an effect that corrosion does not generate | occur | produce over a long period of time.
Furthermore, according to the present embodiment, by applying the transparent synthetic resin paint 13L including the foil-like metal piece M, it is possible to manufacture the decorative part 10 that exhibits a metal mirror surface when viewed from the surface. effective.

[Second Embodiment]
The configuration of the second decorative component 20 in the present embodiment will be described with reference to the drawings.
First, the structure of the radiator grille 1 to which the second decorative component 20 is attached will be described with reference to FIG.
As shown in FIG. 1, the radiator grill 1 includes second decorative parts 20 on both sides in the left-right direction of the decorative part 10. Note that the left and right second decorative parts 20 have line-symmetric shapes.

Next, the configuration of the second decorative component 20 will be described with reference to FIGS.
6 is a front view of the second decorative component 20 according to the second embodiment of the present invention, and FIG. 7 is a cross-sectional view taken along line AA of FIG. In FIG. 7, the scale of each component is appropriately changed for description. 6 and 7, the same components as those of the decorative component 10 in the first embodiment shown in FIGS. 2 and 3 are denoted by the same reference numerals, and the description thereof is omitted.

As shown in FIG. 6, the second decorative component 20 is a long component whose entire surface has a metal mirror surface and extends in the left-right direction.
As shown in FIG. 7, the second decorative component 20 includes a transparent member 21, a metal coating layer (transparent synthetic resin layer) 13, a second colored coating layer 14, an adhesive layer 15, and the like from the front surface side to the back surface side. The base member 16 is sequentially arranged and integrally provided.

The transparent member 21 is a long plate-like member extending in the left-right direction when viewed from the front surface side, and has a shape in which the upper side and the lower side are bent to the back side. The transparent member 21 is formed of a transparent synthetic resin such as polycarbonate or acrylic.
Both the front surface and the back surface of the transparent member 21 are formed to be smooth surfaces, and the surface is subjected to a so-called hard coat treatment that improves durability against scratching and prevents the occurrence of scratches.

The metal coating layer 13 is formed on the back surface of the transparent member 21 with a thickness of 1.0 μm or less.
In addition, since the other structure of the metal coating layer 13 and the structure of the base member 16 from the 2nd colored coating layer 14 are the same as that of 1st Embodiment, the description is abbreviate | omitted.

Next, the manufacturing method of the second decorative component 20 according to the present embodiment is obtained by removing the first coating step of forming the first colored coating layer 12 from the manufacturing method of the decorative component 10 according to the first embodiment. is there. Therefore, the description is omitted.
Furthermore, the reflection operation of the light incident from the surface side of the second decorative component 20 is the same as the reflection operation of the light incident on the metal portion 10 </ b> A from the surface side of the decorative component 10. Therefore, the description is omitted.

Therefore, according to the second embodiment, the same effect as that obtained by the first embodiment can be obtained.
That is, according to the present embodiment, the yield in manufacturing can be improved, corrosion is not likely to occur over a long period of time, and it is viewed from the surface by applying the transparent synthetic resin paint 13L including the foil-like metal piece M. In this case, there is an effect that the second decorative component 20 having a metal mirror surface shape can be manufactured.

 Note that the operation procedures shown in the above-described embodiment, or the shapes and combinations of the components are examples, and can be variously changed based on process conditions, design requirements, and the like without departing from the gist of the present invention. is there.

 For example, in the above embodiment, the material of the foil-shaped metal piece M is aluminum (Al), but the present invention is not limited to such a material, and any metal that can be formed into a fine foil shape may be used. For example, indium (In) or chromium (Cr) may be used.

 Moreover, in the said embodiment, although the 2nd colored coating layer 14 is formed by apply | coating gray synthetic resin paint to the back surface of the metal coating layer 13, it is 1st by apply | coating the coating material of a different color in multiple times. A two-color coating layer 14 may be formed. For example, a black paint may be applied after applying a gray-black paint. By applying the black paint, the color tone of the metal portion 10A can be made clearer.

 Moreover, you may use colors other than gray black and black as the 2nd colored coating layer 14. FIG. As described above, the light incident from the surface side of the metal portion 10A is reflected by the foil-like metal piece M and the second colored coating layer 14, but the color of the second colored coating layer 14 is changed to change the color of the metal portion 10A. The color tone can be changed. For example, when the second colored coating layer 14 is formed using a yellow paint, the metal portion 10A has a gold-colored metal mirror surface.

 Moreover, in the said embodiment, although the 1st colored coating layer 12 is formed by screen printing, a 1st colored coating layer is stuck by sticking a black synthetic resin sheet on the back surface of the transparent member 11 using what is called a hot stamp. 12 may be formed.

 Moreover, in the said embodiment, although the decorative component 10 and the 2nd decorative component 20 are both attached to the radiator grille 1 which is a structural body of a vehicle, this invention is not limited to this structure, A vehicle It may be attached to other components, parts, or the like. For example, a radar using radio waves may be used as a radome for protecting from environmental exposure.

 Moreover, in the said embodiment, although the vehicle is used as an attachment target object, this invention is not limited to the said structure, Other structures etc. may be sufficient. Further, the vehicle as the attachment object may be a vehicle having one or a plurality of wheels. Moreover, the vehicle which moves by a caterpillar etc. and the vehicle which moves on a track | orbit may be sufficient.

 Moreover, in the said embodiment, although the transparent member 11 was formed with the synthetic resin, this invention is not limited to this material, Glass etc. may be sufficient.

 Moreover, in the said embodiment, although the contact bonding layer 15 is formed, it is not formed when the connection with the 2nd colored coating layer 14 and the base member 16 can be made strong by selecting an appropriate material, for example. Also good.

DESCRIPTION OF SYMBOLS 10 ... Decorative part, 11 ... Transparent member, 13 ... Metal coating layer (transparent synthetic resin layer), 20 ... Second decorative part, 21 ... Transparent member, M ... Foil-like metal piece

Claims (5)

A transparent member formed so that the back surface is a smooth surface, and a transparent synthetic resin layer provided on the back surface of the transparent member and provided with a colored coating layer on the back surface ;
A plurality of foil-like metal pieces are separated from each other on at least the transparent member side in the transparent synthetic resin layer, and are respectively covered with the transparent synthetic resin in a posture substantially parallel to the back surface of the transparent member, and buried.
A decorative part characterized in that the total mass of the foil-like metal pieces is 5% to 50% of the total mass of the transparent synthetic resin forming the transparent synthetic resin layer.   The decorative part according to claim 1, wherein the foil-like metal piece has a thickness of 500 mm or less.   The decorative part according to claim 1 or 2, wherein the total length of the foil-shaped metal piece is 20 µm or less.   The decorative part according to any one of claims 1 to 3, wherein the transparent member is made of a synthetic resin. A method for producing a decorative part having a transparent synthetic resin layer provided on the back surface of the transparent member and provided with a colored coating layer on the back surface,
A molding step of molding the transparent member so that the back surface thereof is a smooth surface;
An application step of applying a transparent synthetic resin coating containing 5% to 50% of the total mass of a plurality of foil-like metal pieces on the back surface of the transparent member;
While the transparent synthetic resin coating is dry, at least the foil-like metal pieces located on the transparent member side are separated from each other, and are each covered with the transparent synthetic resin so as to be substantially parallel to the back surface of the transparent member. A drying step to orientate as follows:
A method for manufacturing a decorative part, comprising:

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