Disclosure of Invention
The invention aims to provide a preparation method of a stable spot brick, which is characterized in that a semi-transparent glaze layer is applied before printing and decorating a blank, simulated spots are printed and decorated by ink jet on the semi-transparent glaze layer, so that the influences of color fluctuation caused by spots of the blank and uneven spots caused by particle shunting are weakened, the stable and layered visual effects of the spots on the surface of the spot brick are realized, the problem of uncontrolled colors of the spots of the blank is solved, the visual effects of the spot brick are not lost, the key simulated false spots are uniformly distributed in the production process, the size of the spots is not shunted, the complex one-time transfer or two-time transfer processing process of the spots of the blank is not needed, and the stable spot brick can be stably produced by conventional granulation.
The technical scheme of the invention is that the preparation method of the stable spot brick is characterized by comprising the following steps:
firstly, pressing a blank: the blank powder consists of conventional powder and spots; the particle size of the conventional powder is 0.3-0.6 mm, the particle size of the spot powder is 1-3 mm, and the spots consist of white spots, blue spots and black spots, wherein the proportion of the white spots is 5-10%, the proportion of the blue spots is 10-20%, and the proportion of the black spots is 70-80%;
drying the green body: drying at 80-130 ℃ for 40-60 minutes;
performing simulation treatment: before pattern decoration, a semi-transparent glaze layer is applied to the surface of a blank in advance, the color tone of the glaze layer is close to the surface color of the blank, and then ink-jet false spots with the size and the color close to those of blank spots are printed by an ink-jet printing decoration technology, so that high simulation on vision is realized, and the color and the spot effect of the semi-transparent glaze are basically consistent with those of the blank;
pattern decoration: after the simulation treatment, performing screen printing decoration, rubber roll printing decoration and ink-jet printing decoration, performing pattern effect and color effect decoration, and adjusting the color decoration effect on the surface of the ceramic tile;
carrying out protection glaze: after the color and pattern effects are decorated by the screen printing or rubber roll printing or ink-jet printing decoration process, a layer of transparent glaze slip is finally applied for protective decoration, the thick and heavy feeling of simulation spots on the semitransparent glaze layer is increased, the spots are deposited under the glaze layer, and high simulation fusion with the spots of the blank body is realized;
sixthly, burning: the sintering temperature is 1150-1250 ℃, and the sintering time is 40-60 minutes.
Preferably, the method comprises the following steps: the translucent glaze layer comprises the following chemical components:
SiO2 45~60%
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Al2O3 13~25%
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CaO 4~7%
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Na2O 3~10%
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ZnO 2~4%
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BaO 3~10%
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the glazing specific weight is 1.15-1.35, and the glazing amount is 50-100 g/piece.
Preferably, the method comprises the following steps: the protective glaze slip comprises the following chemical components:
SiO2 45~55%
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Al2O3 15~23%
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CaO 7~15%
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Ka2O 5~10%
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ZnO 1~4%
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BaO 5~10%
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the specific gravity is 1.15-1.35, and the glazing amount is 50-100 g/block; glazing mode: and (5) spraying glaze on the glaze cabinet.
Compared with the prior art, the invention has the beneficial effects that:
the method has the advantages that the semi-transparent glaze layer is applied to the surface of the ceramic tile firstly, so that the effect of spots of a blank body can be penetrated, the influence of spot change on the color of the ceramic tile can be buffered, and the continuous and stable production of spot brick products can be realized.
According to the invention, the simulated spots are decorated by ink-jet printing on the semitransparent glaze layer, so that the influences of color fluctuation caused by spots of the blank body and uneven spots caused by particle shunting are weakened, the stable and layered visual effects of the spots on the surface of the spot brick are realized, the simulation degree and stability of the spots can be achieved by using an ink-jet printing technology, the additional spots in the blank body are not relied on, the production cost is reduced, and the transfer process is reduced.
The production process of the simulated false spots is uniformly distributed, the particle size distribution is avoided, a more simplified and reasonable production process is adopted, the spots of the blank body are not required to be subjected to a complicated primary transfer or secondary transfer processing process, and the stable production can be realized through conventional granulation.
The invention simplifies the production process, reduces the cost of production blank and the investment of related equipment and personnel, and reduces the emission of waste water and waste gas.
The method improves the stability of the spot brick processing process, reduces the degree of dependence on the color and spots of the green body, and reduces the complicated transfer process of the green body.
Sixthly, different spot decoration effects of the product can be flexibly and effectively adjusted by adjusting the semitransparent glaze layer and the ink-jet printing effect, a complex granulation process is not needed, and the production time and the process flow are shortened.
The method does not rely on blank color or blank spots to achieve the spot effect any more, the production process flow is universal with the production process flow of common products, the adaptability is strong, the universality is strong, and the process waste can be effectively reduced.
Detailed Description
The invention will be further described in detail with reference to the following examples:
the preparation method of the stable spot brick comprises the following steps:
firstly, pressing a blank: the blank powder consists of conventional powder and spots; the particle size of the conventional powder is 0.3-0.6 mm, the particle size of the spot powder is 1-3 mm, and the spots consist of white spots, blue spots and black spots, wherein the proportion of the white spots is 8%, the proportion of the blue spots is 16%, and the proportion of the black spots is 76%;
drying the green body: drying at 80-130 ℃ for 40-60 minutes;
performing simulation treatment: before pattern decoration, a semi-transparent glaze layer is applied to the surface of a blank in advance, the color tone of the glaze layer is close to the surface color of the blank, and then ink-jet false spots with the size and the color close to those of blank spots are printed by an ink-jet printing decoration technology, so that high simulation on vision is realized, and the color and the spot effect of the semi-transparent glaze are basically consistent with those of the blank;
the translucent glaze layer comprises the following chemical components:
SiO2 55%
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Al2O3 21%
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CaO 6%
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Na2O 8%
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ZnO 3%
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BaO 7%
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the glazing specific gravity is 1.15-1.35, and the glazing amount is 50-100 g/block;
pattern decoration: after the simulation treatment, performing screen printing decoration, rubber roll printing decoration and ink-jet printing decoration, performing pattern effect and color effect decoration, and adjusting the color decoration effect on the surface of the ceramic tile;
carrying out protection glaze: after the color and pattern effects are decorated by the screen printing or rubber roll printing or ink-jet printing decoration process, a layer of transparent glaze slip is finally applied for protective decoration, the thick and heavy feeling of simulation spots on the semitransparent glaze layer is increased, the spots are deposited under the glaze layer, and high simulation fusion with the spots of the blank body is realized;
the protective glaze slip comprises the following chemical components:
SiO2 51%
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Al2O3 19%
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CaO 11%
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Ka2O 8%
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ZnO 3%
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BaO 8%
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the specific gravity is 1.15-1.35, and the glazing amount is 50-100 g/block; glazing mode: glaze spraying of a glaze cabinet;
sixthly, burning: the firing temperature is 1185 ℃, and the firing time is 53 minutes.
The above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.