JPS6213400A - Method of forming embossed pattern on surface of enamel molded shape - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for forming an embossed pattern on the surface of a metal molded body whose surface has been enameled, that is, an enamel molded body. To provide a method by which a pattern can be easily formed without being restricted by the shape of a surface to be embossed.

[Prior Art] Enamel molded products with embossed surfaces have been used in various molded products to enhance their design. Embossing methods are used, such as coating or electrodepositing ceramic paint on a metal plate and firing it, or applying ceramic paint on a metal plate, applying embossing, and firing it. has been done.

[Problems to be Solved by the Invention] By the way, in the method for obtaining the enamel molded body whose surface is embossed, the former method is as follows.

It is difficult to create fine embossed patterns on metal plates,
Moreover, since the embossed surface is coated with ceramic paint in a subsequent process and fired, it has the disadvantage that the unevenness of the embossed pattern is no longer sharp. . In addition, the latter method has the disadvantage that the surface of the ceramic paint before firing is generally brittle and easily crumbles, and therefore requires great care when implementing it. Furthermore, both methods have the drawback that it is difficult to apply the above-mentioned embossing when the surface shape is complex other than a flat surface.

In contrast, the method for forming an embossed pattern of the present invention consists of a method of introducing embossed irregularities into a ready-made enamel molded body, and overcomes all the drawbacks of the conventional method for obtaining an enamel molded body with an embossed pattern. Enamel t which has a sharp uneven embossed pattern without any restrictions on the shape of the surface on which the embossed pattern is applied.
This provides a method that can produce shapes over a long period of time.

[Means for Solving the Problems 1] The method of forming an embossed pattern on the surface of the enamel molded product of the present invention is to apply the printed pattern of a transfer film having a printed pattern using a printing ink containing a sublimable resin using a hydraulic method. Then, the enamel part of the enamel molded body is transferred to the outer surface of the enamel molded body, and then fired at a temperature that makes the enamel part of the enamel molded body fluid, and then cooled to remove the surface of the part covered with the printed pattern.
An embossed pattern consisting of a concave-convex pattern in which the thickness of the sintered part is higher than the thickness of other parts, that is, an embossed pattern that is in sync with the pattern is formed.

The method for forming an embossed pattern that matches the pattern on the surface of the enamel molded article of the present invention is to form a printed pattern using a printing ink containing a vehicle made of a sublimable resin on a water-soluble or water-swellable film, and then use it for transfer. 1st to get the film
a second step of floating the transfer film on the water surface with the printed pattern side of the transfer film facing upward before the printed pattern on the transfer film dries and loses wettability; Similarly, before the printed pattern on the transfer film dries and loses its wettability, and after the water-soluble or water-swellable film swells on the water surface and before it starts spreading, the transfer film floating on the water surface is Push in the enamel molded body to be embossed from the L side of the film,
The transfer film is attached to the outer surface of the enamel molded body by water pressure and spread.

A third step of adhering, and after transferring the printed pattern on the transfer film to the outer surface of the enamel molded body,
A fourth step of removing the water-soluble or water-wettable film in the transfer film, and a fifth step of drying the enamel molded body to which the printed pattern is attached to the outer surface and removing water droplets. By firing at a temperature that causes the enamel placement part of the enamel molded body to have fluidity, a difference is created in the fluidity between the enamel placement part in the part covered by the printed pattern and the enamel placement part in other parts. By cooling after passing through the sixth step, a sharp uneven embossed pattern is formed in which the thickness of the enamel part of the part where the surface was covered with the printed pattern is raised higher than the thickness of other parts. It is something to do. In addition, when the printed pattern on the transfer film is formed using printing ink containing additives such as colored fired pigments and glass frit, it is necessary to use an embossed pattern in which the color and gloss of the convex parts of the embossed pattern are different from those of the four parts. When the printed pattern is formed with a printing ink containing an extender pigment, in the sixth step, the fluidity of the enamel negative part of the part whose surface is covered with the printed pattern is determined. Since the suppressing force of the embossed pattern becomes large, it is possible to form an embossed pattern with a large difference in unevenness.

The water-soluble or water-swellable film in the transfer film used in the method of the present invention having the above-mentioned structure has the property of absorbing water and swelling by floating on the water surface, and also has the property of absorbing water and swelling when floating on the water surface, and also has the property of absorbing water and swelling when floating on the water surface. Therefore, materials that can be easily spread and deformed to follow the shape of the object and that can be subjected to normal printing processes are used. Specifically, starch-based films, polyvinyl alcohol resin films, water-swellable or water-swellable films such as mixed resin films mainly composed of polyvinyl alcohol resins that are made of a mixed system of polyvinyl alcohol and starch, and polyoxyethylene films A dissolvable film is utilized.

The printed pattern formed on the surface of the water-soluble or water-swellable film is printed using a vehicle made of a sublimable resin as an essential component and optionally additives such as colored calcined pigments, extender pigments, and glass frits. Although it is formed by ink, the solvent of the printing ink is preferably one that dries slowly, and the printed pattern on the transfer film is easy to temporarily adhere to the water-soluble or water-swellable film, and furthermore, the Printing ink is used that uses a sublimable resin as a vehicle that can easily adhere to the surface of the body.

Vehicles made of sublimable resin, which is an essential component in the printing ink for forming the printed pattern, include 1, for example, acrylic ester resins, methacrylic acid resins,
These co-bonding resins, butyral resins, cellulose resins, alkyd resins, polyethylene oxides, phenol resins, urea resins, melamine resins, polyesters, melamine-alkyd resins, vinyl resins, maleic acid resins, etc. are used. In addition, as the colored fired pigments that can be used as printing ink Ω-containing components if necessary, for example, oxides of Fe, Cr + Zn, oxides of brown Z n + Co + Al, etc.・・・・・・
...... 8 colors Ti, Zn, Co, Ni, Cr oxides... Green Ti, Ba, Ni, Pb,
Sb, Cd oxides...Yellow Cd, Se, S oxides...Red Fe, Cu
, Mn, Cr, Co oxides... In addition to black, CdS, CaO, etc. are used. Similarly, calcium carbonate, precipitated barium carbonate, clay, silica, and the like are used as extender pigments that may be included in the printing ink if necessary. Furthermore, glass frit, which is also included as an ingredient in printing ink as needed,
For example, pb.

Low melting point glass consisting of 78%, 5i010%, 820512%, PbO-B2O3 thread, PbO-B20T,
-8iO2 system, PbO-ZnO-B2O3 system, 5n
A material made of glass such as 02-TiO2-3+02-PbO-Cd0 and having a particle size of about 2 to 30 μm is used. Further, as the slow-drying solvent preferably used in the printing ink, there are solvents which do not corrode the enamel surface, such as pentane and hexane.

Aliphatic hydrocarbons such as heptane, octane, etc. or mixtures thereof such as gasoline, petroleum, benzine, mineral spirits, petroleum naphtha, aromatic hydrocarbons such as benzene, toluene, xylene, cyclohexane, ethylbenzene, trichlorethylene, etc. ,/! - Halogenated hydrocarbons such as chloroethylene, chloroform, and tetrachloride, monohydric alcohols such as methyl alcohol, ethyl alcohol, propyl alcohol, butyl alcohol, amyl alcohol, benzyl alcohol, diacetone alcohol, ethylene glycol, propylene Polyhydric alcohols such as glycol and glycerin, ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, methyl cyclohexanone, and isophorone, ethyl ether, isopropyl ether, ethylene glycol mono-methyl ether, ethylene glycol mono-ethyl ni? Ethers such as diethylene glycol mono-methyl ether, diethylene glycol mono-ethyl ether, diethylene glycol di-butyl ether, ethylene glycol mono-methyl ether acetate, ethylene glycol mono-ethyl ether acetate, diethylene glycol mono-fog Acetate esters such as methyl acetate, diethylene glycol monomer ethyl ether acetate, diethylene glycol monobutyl ether φ acetate,
Single or mixed solvents such as esters such as acetic acid esters, nitrohydrocarbons, nitriles, amines, other acetals, acids, and furans are used.

The means for forming a printed pattern on the water-soluble or water-swellable film using the printing ink described above, that is, the printing ink containing a vehicle made of a sublimable resin as an essential component, includes, for example, an intaglio printing method, a lithography method, etc. Printing methods such as printing methods, letterpress printing methods, screen printing methods, etc., application methods such as brush painting, spatula painting, spraying, etc., and other known means such as drawing methods by hand, brush, etc. may be used. However, if glass drift is mixed in the printing ink used to form the printed pattern, there is a risk that the doctor blade will be worn out, so it is preferable to use a printing method that uses a doctor blade. do not have. In addition,
The printed pattern is formed in any picture shape such as letters, figures, symbols, etc.

The following is the 琺 of the present invention! The specific steps of the method for forming an embossed pattern that matches the pattern on the surface of a molded body will be explained based on FIG.

The first step of the method for forming an embossed pattern that matches the pattern on the surface of the enamel molded product of the present invention is to use a printing ink containing a sublimable resin vehicle as an essential component on the water-soluble or water-swellable film 4. A transfer film 5 is obtained by forming a printed pattern 3.

In the second step following the first step, before the printed pattern 3 on the transfer film obtained in the previous step loses its hot water properties, that is, before the printed pattern 3 dries and solidifies, the transfer film is 5 is floated on the water surface 2 with the printed pattern on the three sides of the transfer film 5 being the -F side. In this step, the sheet-shaped transfer film 5 is floated on the water surface one by one, but care is taken to prevent air bubbles from entering between the transfer film 5 and the water surface 2, and to prevent wrinkles from forming in the transfer film 5. It is safe to float on the water surface 2 in this way.

The third step of the method of the present invention is performed before the printed pattern 3 on the transfer film dries and loses its wettability, and after the water-soluble or water-swellable film 4 swells on the water surface. Before starting, the enamel molded body 6 whose surface is composed of the enamel negative part 7 is lowered in the direction of the arrow from the L direction of the transfer film 5 on the water surface z in the second step, and the molded body 6 is The transfer film 5 is attached to the surface by water pressure, spread, and brought into close contact. The temperature of the water used to float the transfer film 5 is adjusted to an appropriate temperature depending on the properties of the water-soluble or water-swellable film 4 constituting the film 5. ) is preferably used, the water temperature is preferably about 40 to 60°C, and it is preferable to add about 2 to 4% of amylase or the like to promote dissolution during removal of the film.

After transferring the printed pattern 3 on the transfer film 5 to the surface of the enamel molded body 6 serving as the transfer body, a fourth step is to remove the water-soluble or water-swellable film 4 on the transfer film 5.
The process is carried out.

In order to remove the water-soluble or water-swellable film 4 in the transfer film 5, the most efficient and preferable method is to shower wash the transfer object with water.

As a result, the adhered film 4 is completely removed, and the stains generated during transfer are also cleaned. At this time,
Although the water temperature varies depending on the material of the water-soluble film 4 used, generally 15 to 60°C is appropriate, and a washing time of about 1 to 10 minutes is sufficient.

Note that if the temporary adhesion between the printed pattern and the surface of the enamel molding is insufficient, there is a risk that the printed pattern will fall off due to the above-mentioned shower cleaning. In this case, the concerns mentioned above can be avoided.

In the subsequent fifth step, the enamel molded body 6 is dried to remove moisture to obtain the enamel S molded body 6 having the printed pattern 3 on the surface, and then the enamel negative part 7 of the enamel molded body 6 has fluidity. The sixth step is to perform firing at a temperature that produces .

By carrying out the cooling step following the first to sixth steps, an enamel molded body having an embossed pattern on the surface that matches the pattern, which is the object product of the present invention, is obtained.

[Example] Next, the specific structure of the method of forming an embossed pattern on the surface of a porcelain body according to the present invention will be described with reference to an example.

Example 1 A polyvinyl alcohol-based sheet film with a thickness of 30 [
A printed pattern consisting of an abstract pattern of "x"/" was formed on one side of a sheet of paper (manufactured by Higashi Shichiguchi Co., Ltd.: ET20#30) using printing ink [A] having the following composition, using a 150-mesh silk screen. .The printing ink density of the printed pattern is 2.
0g/m'.

Printing ink [A] (1) Ethyl cellulose ・・・・・・・・・・・・
...15ffi Part (2) Alkyd resin
・・・・・・・・・・・・・・・10 parts by weight (3) Precipitated Ba carbonate ・・・・・・・・・・・・・・・
5 parts by weight (4) Butyl cellosolve ・・・・・・・・・
30 parts by weight (5) Butyl carpitol acetate 40 parts by weight Next, immediately transfer the obtained transfer film so that the printed pattern side of the transfer film is the top surface. Float on the surface of water with a temperature of 30℃, and
After a few seconds, an enameled molded body made of an enameled iron plate was pushed in, and the transfer film was brought into close contact with the enamel core surface of the enameled molded body, thereby transferring the printed pattern onto the surface of the molded body.

After that, the enamel molded body was pulled out of the water and heated for 40 minutes.
After immersing in warm water at ℃ for 10 minutes, showering with clean water, removing the polyvinyl alcohol film on the surface, and drying.
The product was fired at 860° C. for 5 minutes and then allowed to cool naturally to obtain an enamel molded product with an embossed pattern that matched the pattern of the target product.

The enamel molded body used as the object to be transferred to the transfer film was obtained by coating an iron plate with a thickness of 0.2 layers with a lower glaze of antimony glaze and an upper glaze of titanium glaze, and firing at 820°C. It is something.

The enamel molded body having the embossed pattern obtained by the following process is shown in FIG.

Enamel molded body 1 composed of iron plate part 8 and enamel holder part 9
1101 of precipitated barium carbonate on the surface of the enamel negative part 9 of 0
1 is formed in a pattern, and the thickness of the enamel placement part 9A of the part covered with the precipitated barium carbonate film 11 is thicker than the thickness of the enamel part 9B of the other part. This is an enamel molded article having an embossed pattern consisting of an uneven surface.

[Operations and Effects of the Invention] The method for forming an embossed pattern on the surface of the enamel molded product of the present invention is described below. The printing pattern of the transfer film formed by the printing means is transferred onto the surface of the enamel molded body by a hydraulic method, and then the enamel quality of the enamel molded body is fluidized. By firing at a temperature that produces embossed patterns of the same standard, a difference is created in the fluidity of the enamel between the area covered with the printed pattern and the other areas, and this is cooled. can be obtained in large quantities. In addition, in the above-mentioned firing process, the reason why there is a difference in the fluidity of the enamel between the part covered with the printed pattern and the other parts is that the enamel in the part that is in contact with foreign material changes during heating. In order to absorb the heat generated by the sublimation of the sublimation resin in the printed pattern and the fluidity being physically inhibited by the foreign substance, the negative part of the enamel in the part in contact with the sublimation resin is This is due to the fact that it is difficult to raise the temperature compared to other parts of the enamel.

Furthermore, in the method of the present invention, the step of transferring the printed pattern on the transfer film to the surface of the enamel molded body is achieved by pressing the enamel molded body onto the transfer film floating on the water surface. Even if the surface of the 纺S molded object to which the printed pattern of the transfer film is transferred has a complex shape other than a flat surface, the transfer film will be brought into close contact with the surface to be transferred and there will be no distortion. Since a well-ordered transfer printing pattern can be formed on the surface of the enamel molded body, it is possible to form an embossed pattern with a well-ordered uneven pattern.

Furthermore, in the method of the present invention, as described above, an uneven embossed pattern is obtained by partially creating a difference in fluidity in the enamel placement part and then cooling it. are formed sharply and of high quality.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a model showing the middle of the transfer process for forming an embossed pattern on the surface of the enamel molded product of the present invention, and FIG. FIG. 1: water tank, 2: water surface, 3: printed pattern, 4: water-soluble or water-swellable film, 5: transfer film, 6: enamel molded body, 7: enamel B purchase.

Claims (2)

[Claims] (1) A first step of forming a printed pattern using a printing ink containing a vehicle made of a sublimable resin on a water-soluble or water-swellable film to obtain a transfer film; and a step of drying the printed pattern on the transfer film. Before losing its wettability, there is a second step in which the transfer film is floated on the water surface with the printed pattern side of the transfer film facing upward, and the printed pattern on the transfer film also dries and becomes wettable. before the water-soluble or water-swellable film swells on the water surface and before it begins to diffuse.
a third step of pushing in the enamel molded body to be embossed from the upper surface of the transfer film floating on the water surface and spreading and adhering the transfer film to the outer surface of the enamel molded body by water pressure; A fourth step of removing the water-soluble or water-swellable film in the transfer film after transferring the printed pattern to the outer surface of the enamel molding, and the enamel molding with the printed pattern attached to the outer surface. The enamel part of the part covered with the printed pattern and the enamel part of other parts are removed by drying the body and removing water droplets, and firing at a temperature at which the enamel part of the enamel molded body becomes fluid. A method for forming an embossed pattern on the surface of an enamel molded article, the method comprising cooling the enamel molded article after passing through a sixth step of causing a difference in fluidity between the two parts. (2) A patent in which the pattern printed by a printing ink containing a vehicle made of a sublimable resin is a pattern printed by a printing ink containing one or more additives selected from colored calcined pigments, extender pigments, and glass frits. Claim 1
A method for forming an embossed pattern on the surface of an enamel molded article as described in 1.