JP4993797B1 - How to decorate metal products - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for decorating a metal product and a metal product provided with an ornament having the same degree of hardness as a pedestal part.
A decoration method for a metal product in which a decoration is formed by applying a coating material on a surface of a base made of a metal material and curing the coating material, and mixing a colored resin material and an epoxy curing agent. A first step of preparing a colored coating material by stirring and a second step of applying the coating material to the pedestal; a third step of curing the coating material applied to the pedestal over time; The fourth step of baking the coating material constitutes a method for decorating metal products.
[Selection] Figure 3

Description

  The present invention relates to a metal product decoration method for forming a decoration by applying a coating material on a surface of a base made of a metal material and curing the coating material with time, and a metal product manufactured by this method.

Conventionally, decorative crafts such as cloisonne ware having a pattern, a picture, etc. on the surface of a base made of a metal material are known.
There is also known a metal product in which the surface of a pedestal made of a metal material such as a noble metal is decorated by applying a resin paint or the like and coloring it.
Furthermore, a metal product is also known in which the surface of a base made of a metal material is decorated by, for example, filling an epoxy paint and curing it.

  However, in such a metal product, since the adhesion strength of the decorative object to the pedestal is low, when the surface of the decorative object applied to the surface of the pedestal is to be polished, the decorative object may fall off the pedestal. Therefore, it is virtually impossible to process the surface of the decorative object flush with the surface of the pedestal.

In addition, when the surface of the pedestal is damaged, if the surface of the pedestal is polished, the decorative object is also polished, and the decorative object may fall off from the pedestal.
Furthermore, since the hardness of the pedestal and the decorations are different from each other, if the pedestal and the decorations are polished at the same time, the decorations with lower hardness are worn more than the metals that make up the pedestal, such as platinum, gold, and silver. As a result, the entire outer shape of the metal product is distorted.

  In view of the above, an object of the present invention is to provide a metal product decoration method and a metal product provided with a decorative object having the same degree of hardness as a pedestal portion.

  The object of the present invention is, according to the first configuration of the present invention, a method for decorating a metal product, in which a decorative material is formed by applying a coating material to the surface of a base made of a metal material and curing it over time. The first step of preparing the coating material by mixing and stirring the resin material and the epoxy curing agent, the second step of applying the coating material to the pedestal, and curing the coating material applied to the pedestal over time And a fourth step of baking a time-cured coating material.

  In the metal product decoration method according to the present invention, the first defoaming of the coating material is preferably performed between the first stage and the second stage.

  The metal product decoration method according to the present invention preferably performs a second defoaming of the coating material between the second and third stages.

  In the method for decorating a metal product according to the present invention, the pedestal coated with the coating material is preferably maintained at 60 to 80 ° C. during the second defoaming.

  In the metal product decoration method according to the present invention, preferably, in the third stage, the pedestal coated with the coating material is held at 60 ° C to 80 ° C.

  In the fourth aspect of the method for decorating a metal product according to the present invention, the base on which the coating material is applied is preferably maintained at 80 to 130 ° C in the fourth stage.

  Moreover, according to the 2nd structure of this invention, the said objective is achieved by the metal product manufactured by the decoration method of the metal product mentioned above.

According to the first configuration, the coating material prepared in the first stage is applied to the pedestal in the second stage and then cured by aging in the third stage. Burned in stages.
Thereby, the hardness of the coating material cured with time in the third stage is further increased by baking in the fourth stage, and the adhesion strength of the coating material to the pedestal surface is increased.
Therefore, the decoration formed of the coating material has a higher hardness, for example, a hardness comparable to that of a metal material used for a pedestal or the like. At the same time, durability against changes with time is also increased.

Further, even if an external force is applied to the decorative object due to an increase in adhesion strength, the decorative object will not easily peel off from the base.
For this reason, for example, if the pedestal of the metal product is damaged, even if the surface of the pedestal is polished, the decorative object may be peeled off from the pedestal, or only the decorative object will be more polished and worn, and the entire metal product will be worn. There will be no distortion of the outer shape of the.
In addition, when polishing the surface of the pedestal and decorative objects in the finishing process during the manufacture of metal products, the decorative object has almost the same hardness as the pedestal, so even if the surface of the pedestal and decorative objects are polished at the same time Since the surface of the pedestal and the decorative object are evenly worn, so-called flush finish processing is possible as a whole, and the surface of the pedestal and the decorative object can be re-polished at the same time even when scratched. In addition, the gloss can be maintained even when repolished.

  When the first defoaming of the coating material is performed between the first stage and the second stage, or the second defoaming of the coating material is performed between the second stage and the third stage, respectively. In this case, bubbles present in the coating material before curing are removed, the gloss of the coating material after curing is increased, the appearance is improved, and the stability is increased, so that the hardness of the coating material is increased and the pedestal is increased. The adhesion strength of the coating material with respect to is increased.

  When the pedestal coated with the coating material at the time of the second defoaming is heated at 60 ° C. to 80 ° C., the defoaming is performed smoothly, so that almost complete defoaming can be realized.

  When the pedestal to which the coating material is applied in the third stage is heated at 60 ° C. to 80 ° C., the coating material can be cured with time smoothly and stably.

  In the case where the pedestal coated with the coating material in the fourth stage is held at 80 ° C. to 130 ° C., the hardness of the coating material is effectively increased by baking. Here, when the baking temperature is less than 80 ° C., baking is not sufficiently performed, and the hardness of the coating material is not so high. In addition, when the baking temperature exceeds 130 ° C., the coating material is discolored and may be burnt in some cases. In addition, when the pedestal coated with the coating material in the third stage is heated at 60 ° C. to 80 ° C. and then held at 80 ° C. to 130 ° C. in the fourth stage, it is divided into two stages without abrupt baking. By carrying out separately, it is possible to prevent the coating resin from peeling off or dropping off due to the shrinkage of the resin, resulting in a gap between the metal base and the coating resin.

  Moreover, according to said 2nd structure, the coating material apply | coated to the base becomes sufficiently high hardness by time-hardening and baking, and the decoration to be formed, for example, the hardness comparable to the metal material which comprises a base It becomes. As a result, when polishing the pedestal, the decorations are not peeled off from the pedestal, or only the decorations are not polished and worn, so the pedestal is polished without deforming the outer shape of the metal product. be able to.

In this way, according to the present invention, it is possible to provide a metal product decoration method and a metal product provided with a decorative object having the same degree of hardness as the pedestal portion.

It is a schematic perspective view which shows the structure of one Embodiment of the metal product by this invention. It is a schematic sectional drawing of the metal product of FIG. It is a flowchart which shows the structure of one Embodiment of the manufacturing method of the metal product by this invention.

1 and 2 show an embodiment of a metal product manufactured according to the present invention.
1 and 2, the metal product 10 includes a pedestal 11 and a decoration 12 made of a coating material provided in a recessed portion 11 a provided on the surface of the pedestal 11.

The pedestal 11 is made of a metal material including a metal or an alloy such as platinum, gold, and silver.
Here, the pedestal 11 includes a recessed portion 11a on a part of its surface.
The depth of the recessed portion 11a is selected so that the decorative object 12 made of a coating material provided therein has an appropriate thickness, and is about 1 mm, for example.

  The decorative object 12 is composed of a coating material to be described later, and the coating material is filled into the recessed portion 11a of the base 11 and cured, whereby the coating material adheres to the base 11 and is fixedly held.

The coating material is produced by mixing and stirring a colored resin material and an epoxy curing agent.
For example, epoxy is used as the resin material, and the resin material is colored in advance by mixing a pigment or the like so as to obtain a desired color.
As the resin material, for example, Epicorton Sashicast SS manufactured by Dainippon Paint Co., Ltd. is used.

  The epoxy curing agent is an epoxy curing agent used in a conventional epoxy resin coating, and, for example, Epicorton curing agent CA-80 manufactured by Dainippon Paint Co., Ltd. is used.

The metal product 10 having such a configuration is manufactured as shown in the flowchart of FIG. 3 according to an embodiment of the metal product manufacturing method of the present invention.
First, in step ST1, a colored resin material (for example, Epicoton Sashicast SS) and an epoxy curing agent (for example, Epicoton curing agent CA-80) are mixed in a preparation container at a ratio of 10: 3. In Step ST2, the preparation container is mixed. The colored resin material and the epoxy curing agent inside are agitated.
Thereby, the coating material which consists of a coloring resin material and an epoxy hardening | curing agent is prepared.

Subsequently, in step ST3, the preparation container is set in a vacuum defoamer, the vacuum defoamer is operated, the pressure in the vacuum defoamer is reduced to about -0.1 Pa, and the coating material is applied for about 10 minutes. Perform first defoaming.
In the coating material, bubbles generated from the epoxy curing agent are easily defoamed by reducing the pressure in the vacuum defoamer.

  Thereafter, the preparation container is taken out from the vacuum deaerator, and the prepared coating material is applied to the recessed portion 11 a provided in the base 11 of the metal product 10 in step ST4.

Subsequently, in step ST5, this pedestal 11 is set in a vacuum defoamer, the vacuum defoamer is operated, and the pressure in the vacuum defoamer is reduced to about -0.1 Pa, for about 5 to 10 minutes. A second degassing is performed on the coating material. At this time, by using an appropriate heating means, for example, a heated metal plate, the entire pedestal 11 is maintained at a temperature of about 60 ° C. to 80 ° C., thereby realizing almost complete defoaming.
By the above steps, bubbles present in the coating material applied to the base 11 are degassed.

Thereafter, the pedestal 11 is taken out from the vacuum defoamer, and in step ST6, the coating material is cured with time for about 90 minutes, for example.
Here, the whole base 11 is maintained at a temperature of about 60 ° C. to 80 ° C. by appropriate heating means. As a result, the coating material is stably cured with time and is in a state suitable for baking. Moreover, by carrying out in 2 steps | paragraphs, without performing baking rapidly so that it may hold | maintain at 80 to 130 degreeC in the step after heating the base which apply | coated the coating material in this step at 60 to 80 degreeC. Further, it is possible to prevent the coating resin from peeling or dropping due to a gap between the metal base and the coating resin due to the shrinkage of the resin.

Next, in step ST7, using the baking means, the entire base 11 is maintained at a temperature of about 80 ° C. to 130 ° C., and the coating material is baked for about 90 minutes, for example.
Thereby, the coating material applied to the pedestal 11 has a hardness higher than the hardness due to conventional aging curing, as in so-called baking tightening. This is presumed to be due to the increased degree of bonding between the resin paint molecules and the epoxy curing agent molecules.
Accordingly, the coating material has substantially the same hardness as that of the metal material constituting the pedestal 11, and the ornament 12 is produced.
Here, when the temperature is maintained at a temperature lower than 80 ° C. in step ST7, the hardness of the coating material is not so high. When the temperature is higher than 130 ° C., the color of the coating material changes to yellow due to scorching. May end up.

Subsequently, in step ST8, the entire base 11 is cooled by natural cooling, for example.
Finally, in step ST9, the surface of the base 11 and the surface of the exposed ornament 12 are polished.
Here, since the ornament 12 is firmly held by the epoxy curing agent in the recessed portion 11a of the pedestal 11, the ornament 12 is not peeled off from the recessed portion 11a of the pedestal 11 by polishing.
Further, the decorative object 12 has substantially the same hardness as the metal material constituting the pedestal 11 by baking in step ST7. Thereby, compared with the pedestal 11, there is no more abrasion due to polishing. Therefore, the surface of the decorative article 12 is not recessed with respect to the surface of the pedestal 11 after polishing, and the outer shape of the metal product 10 is not deformed. Further, the surface of the pedestal and the decorative object can be re-polished at the same time even when scratched, and the gloss can be maintained when re-polished.
In this way, the metal product 10 including the pedestal 11 and the ornament 12 is completed.

The metal product 10 according to the present invention is configured as described above, and the decoration 12 made of the coating material adheres firmly to the pedestal 11 and has substantially the same hardness as the metal material constituting the pedestal 11. It is excellent in having.
Thereby, in the finishing of the manufacturing process of the metal product 10, the surface of the base 11 and the ornament 12 can be polished, and the surface of the base 11 and the surface of the ornament 12 can be finished so-called flush.

  Further, when the surface of the pedestal 11 is damaged, even if the surface of the pedestal 11 is polished and the surface of the decorative object 12 is also polished, the decorative item 12 is not peeled off from the pedestal 11. In addition, since the surface of the decorative object 12 has substantially the same hardness as the surface of the pedestal 11, only the decorative object 12 is not worn and the surface shape of the metal product 10 is not deformed. Therefore, the base 11 and the decorative object 12 are polished almost uniformly as a whole. Further, even when the surface is scratched, gloss can be maintained by repolishing the pedestal 11 and the decorative object 12 at the same time.

The present invention can be implemented in various forms without departing from the spirit of the present invention.
For example, in the above-described embodiment, the defoaming in steps ST3 and ST5 is performed over a period of about 10 minutes in a state where the pressure is reduced to about -0.1 Pa. Obviously, other pressures and times may be used as long as degassing in the material is ensured.

Further, in the above-described embodiment, the time-hardening in step ST6 is performed at a temperature of about 60 ° C. to 80 ° C. for about 90 minutes, but the time-hardening of the coating material is surely performed. As long as it can be cured over time, it can be cured over time.
Furthermore, in the above-described embodiment, the baking in step ST7 is performed over a time of about 90 minutes at a temperature of about 80 ° C. to 130 ° C. However, as long as the baking of the coating material is performed reliably, As long as the coating material does not change color, baking can be performed for any time and temperature.
In these cases, if the baking time is too short, the baking will not be performed sufficiently, and if the baking time is too long, the coating material will be burnt and discolored. Can be avoided.

  As described above, according to the present invention, there are provided a metal product decoration method and a metal product provided with a decorative object having the same degree of hardness as the pedestal portion.

10 Metal Product 11 Base 11a Recessed Part 12 Decoration (Coating Material)

Claims (7)

A method for decorating a metal product, in which a decorative material is formed by applying a coating material on a surface of a base made of a metal material and curing the coating material over time,
A first stage of preparing a coating material by mixing and stirring a colored resin material and an epoxy curing agent;
A second stage of applying the coating material to the pedestal;
A third step of curing the coating material applied to the pedestal over time;
A fourth stage of baking the time-cured coating material;
A fifth stage of polishing the surface of the coating material;
Including metal product decoration method.   The metal product decoration method according to claim 1, wherein a first defoaming of the coating material is performed between the first stage and the second stage.   The metal product decoration method according to claim 1 or 2, wherein a second defoaming of the coating material is performed between the second stage and the third stage.   The metal product decoration method according to claim 3, wherein the base on which the coating material is applied is held at 60 ° C. to 80 ° C. during the second defoaming.   The metal product decoration method according to any one of claims 1 to 4, wherein, in the third stage, the base on which the coating material is applied is maintained at 60 ° C to 80 ° C.   The metal product decoration method according to any one of claims 1 to 5, wherein, in the fourth stage, the pedestal coated with the coating material is maintained at 80 ° C to 130 ° C.   A metal product produced by the method according to any one of claims 1 to 6.

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