Raw stone porcelain plate and preparation method thereof

Abstract

The invention belongs to the field of ceramics, and particularly discloses a raw stone porcelain plate and a preparation method thereof. The raw stone porcelain plate is obtained by carrying out primary ink jet on a specific green body material, then turning over, carrying out secondary ink jet and firing. The advantages of real elements of the whole body of mechanical cloth are combined with digital jet printing to complement each other, the whole body effect of real powder and granule blank elements is achieved, meanwhile, the effect of color change in different dimensions downwards from the blank surface is generated, any space in the blank contains the random ink jet texture effect, and the color change effect is good. A real three-dimensional and natural transition effect is formed; and the color is more real and is not limited, and the phenomena of polishing discoloration such as yellow polishing and white polishing are overcome.

Description

Technical Field

[0001] The invention belongs to the field of ceramics, and in particular relates to an original stone ceramic plate and a preparation method thereof. Background Art

[0002] Ceramic plates in the prior art include ceramic plates with a full-body texture formed by a mechanical spreading method, and ceramic plates with a glaze applied to the body and then a pattern texture printed (or a transparent protective glaze applied) or directly inkjet printed on the body. Among them, a full-body texture effect formed by powder and granules can be produced by a mechanical spreading method, but the texture effect formed by this method alone is relatively simple, dull, unnatural and highly repetitive; and although the corresponding effect can be obtained by applying a glaze slurry as a base layer to the brick body and then printing, the penetration of materials such as ordinary ceramic inks on the glaze layer is extremely limited (only less than 0.2 mm in depth), and the pattern is easily lost due to wear and tear, so it is necessary to add a protective layer on the surface, and the penetrating ink is The penetration of corrosive metal ion components into the surface glaze slurry is increased, and an additional penetration aid is required, which has a slightly higher cost. At the same time, due to the non-uniformity in color and density between the surface glaze slurry layer and the lower layer of the green body, a layer will appear between the brick and the surface pattern after firing, resulting in a weak sense of the whole body and obvious artificial traces. As for the method of direct inkjet printing on the green body, since the green body is pressed and formed by a large-tonnage press, the penetration after printing is also limited, and it is difficult for the printed texture to be combined with the penetration of the green body itself, which is equivalent to only a surface effect, and it is difficult to present a heavy texture and a sense of reality. Therefore, the existing inkjet technology solution only presents a surface effect, which cannot be presented in any space within the green body, and there is no random inkjet texture effect in the green body or even at the bottom of the green body.

[0003] In addition, the existing technology also applies functional inks and glazes on the surface of the blank to produce effects such as digital molds, inkjet patterns, and fine carving / sunken textures, but it can only be a superposition of layers and cannot truly interpenetrate and merge into one, so it is only a visual three-dimensional on a plane. Summary of the invention

[0004] The present invention provides a raw stone ceramic plate with whole body texture and multi-dimensional color change and a preparation method thereof, which well solves the problem in the prior art that the printing design effect of the ceramic plate cannot penetrate into the body texture itself and has a weak three-dimensional effect.

[0005] The first object of the present invention is to provide a method for preparing a raw stone porcelain plate, comprising the following steps:

[0006] The blank material is laid out flat and pre-pressed to obtain a pre-pressed body, the surface of the pre-pressed body is firstly ink-sprayed, and after the ink penetrates, it is turned over to obtain a raw material layout body, and the raw material layout body is lightly pressed to make its volume density less than 0.8g / cm 3, then perform a second inkjet process, and after the ink penetrates, perform pressing and forming, and then dry and fire to obtain the raw stone porcelain plate;

[0007] The blank material includes flaky particles, coarse powder and fine powder; the flaky particles have a widest diameter less than 10 mm, a narrowest diameter greater than 1.5 mm and a thickness less than 2 mm; the coarse powder has a particle size of 150 μm-350 μm; the fine powder has a particle size of 60 μm-125 μm.

[0008] The present invention uses flaky particles, coarse powder and fine powder with specific particle size distribution (if materials of sizes other than the above are used, it will affect the molding, the penetration depth and thus the final effect) as the blank material and inkjet ink. Among them, the gap between the flaky particles themselves is relatively the smallest, so the ink penetrates relatively slowly in the flaky particle area and the depth is relatively shallow; secondly, the particle size of the fine powder is relatively small, and the gap between them is also relatively small, so the speed and depth of ink penetration in the fine powder area are also relatively general; finally, the particle size of the coarse powder is relatively the largest, and the gap between them is also relatively the largest, so the ink penetrates relatively quickly in the coarse powder area and the depth is also relatively deep. Ultimately, the penetration depth of the same ink pattern design at the same printing grayscale presents a situation where flaky particles < fine powder < coarse powder, and the ink penetration depth is positively correlated with the depth of the color presented, that is, the deeper the penetration depth, the lighter the relative color (dull), and the shallower the penetration depth, the darker the relatively retained color (bright), thereby realizing the color structure of different dimensions from the surface of the original stone porcelain plate downward, that is, a multi-dimensional color layer, the effect is more realistic, three-dimensional, and the color transition is natural.

[0009] At the same time, the present invention performs a first laying and pre-pressing of the blank material composed of the above three specific materials, then inkjet for the first time, and then flips it (the blank material containing the printed texture color effect can be lumped together, scattered or randomly occupied in the stacking space in the process of flipping), and then lightly presses and inkjet for the second time, so that the printed texture color effect can be randomly presented in any spatial position of the plate, that is, the whole plate blank contains the random inkjet color effect, and with the multi-dimensional color layer of the second inkjet, a truly three-dimensional layered natural and rich whole-body pattern texture is realized.

[0010] Moreover, the present invention can achieve the color penetration of product patterns by using low-cost common ceramic ink, thus avoiding the oil-water separation phenomenon after spraying the base glaze in conventional production. At the same time, the ink has certain adhesion characteristics, and is applied on a powder layer of a certain density under the strong adsorption effect of the powder to form a limited depth of penetration, and the color texture will not show obvious diffusion and distortion. At the same time, due to the certain penetration depth, there is no need to add a protective layer on the surface to prevent the texture from being stepped on and fallen off, which also reduces the cost compared with penetrating ink and penetrating flower ink, and expands the application range of common ceramic ink.

[0011] It should be noted that in the process of pre-pressing the pre-pressed body after the green body is laid out, the green body after the lay-out can be directly pre-pressed as a whole (the pressure is not more than 5 bar, so that its volume density is less than 0.8 g / cm 3 ) to obtain a pre-pressed body; or the flattened blank material can be lightly pressed to make its surface flat, and then the predetermined area is lightly pressed (the pressure is not more than 5 bar, so that its volume density is less than 0.8g / cm 3 ) to form an overall layout material including a local pre-pressed body, and subsequently the overall layout material including the local pre-pressed body is subjected to a first inkjet.

[0012] It should also be noted that the above-mentioned raw material layout body is lightly pressed before the second inkjet printing in order to make the surface of the raw material layout body after light pressing smooth and without density or with low density, so as to facilitate the infiltration of liquid medium materials such as ceramic ink and form a natural, rich and designable inkjet pattern texture of a certain depth.

[0013] In some preferred embodiments, pre-drying is performed before the above compression molding. Pre-drying after the second inkjet printing can prevent the mold from sticking during compression molding.

[0014] In some preferred embodiments, the flaky particles, the coarse powder and the fine powder are mixed and laid out in a flat layout, or the flaky particles, the coarse powder and the fine powder are laid out in a flat layout according to preset partitions. If the former method of mixing and laying out in a flat layout is adopted, the effect of the raw stone porcelain plate of the final product will appear more random and natural; if the latter method of preset partitions is adopted, the color distinction of the final product will be more obvious.

[0015] In some preferred embodiments, the coarse powder is obtained by subjecting the raw materials to ball milling, coloring and stirring, and spraying, and the moisture content of the powder can be 6%-8%; the fine powder is obtained by crushing the coarse powder; the flaky particles are obtained by making the coarse powder and / or the fine powder into flakes and then crushing them, specifically, the coarse powder or the fine powder is fed into a granulator for pre-pressing into flakes, or the slurry after coloring and stirring is dried to form a flake, or the slurry after coloring and stirring is controlled to have a moisture content of 15%-25% in a mud material, which is then extruded, cut and dried to form a flake, or the coarse powder or the fine powder is controlled to have a moisture content of 15%-25% in a mud material, which is then extruded, cut and dried to form a flake; then the flakes are crushed to obtain flaky particles, and the moisture content can be 6%-8%.

[0016] In some preferred embodiments, the ink used in the first inkjet is a non-permeable ceramic ink; the ink used in the second inkjet is a non-permeable ceramic ink, or a combination of a non-permeable ceramic ink and a functional ink.

[0017] In some preferred embodiments, a cutting and polishing step after firing may be performed as required.

[0018] Based on the above preparation method, the second purpose of the present invention is to provide a raw stone porcelain plate obtained by the above preparation method. The obtained raw stone porcelain plate has a whole body texture and a random inkjet texture in any space in the body, and a multi-dimensional color layer within a thickness range of 2mm below the surface. Among them, the flaky particles can at least present a pattern design formed by inkjet printing within a thickness range of 0.2mm below the surface (no more than 0.5mm at most); the fine powder can at least present a pattern design formed by inkjet printing within a thickness range of 0.5mm below the surface (no more than 1mm at most); the coarse powder can at least present a pattern design formed by inkjet printing within a thickness range of 1mm below the surface (no more than 2mm at most).

[0019] In some preferred embodiments, the surface of the original stone porcelain plate can also be provided with a transparent glaze protective layer according to actual needs, or contain a spray-printed pattern and a glaze decorative layer. In some preferred cases, the thickness of the original stone porcelain plate is greater than 5 mm.

[0020] The beneficial effects of the present invention are:

[0021] 1) The present invention proposes a raw stone porcelain plate with multi-dimensional color changes. Compared with the flat visual effect of printing on the blank or glaze surface, the pattern texture formed by printing infiltration on the porcelain plate of the present invention gives full play to the advantages of the real elements of the whole body of the mechanical cloth combined with digital printing, which complement each other. At the same time, it produces the effect of color changes in different dimensions from the blank surface downward due to the difference in the density of the raw material itself before pressing and molding, and any space in the blank contains a random inkjet texture effect, forming a truly three-dimensional and transitional natural effect.

[0022] 2) The present invention proposes a method for preparing raw stone porcelain plates with multi-dimensional color changes, which includes pre-pressing and first spray printing on a predetermined area of ​​the raw material body, then flipping to form a raw material layout body, lightly pressing and spray printing on the raw material layout body for the second time, and then pressing, firing and polishing. Compared with the polished products on the glaze surface, first, there is no transparent glaze layer to separate, and the color can be directly presented, so the color is more realistic; second, the color is not restricted, which overcomes the problem of polishing discoloration such as yellowing and whitening (especially dark colors such as dark red, bright red, purple red, dark blue, purple blue, etc.) when the process of spray printing on the glaze surface and then covering with transparent glaze is adopted, and there will be no glaze defect problem of firing oxidation exhaust due to glaze covering; third, any position in the blank can randomly contain inkjet effects, enriching the blank content. Compared with the whole body product with simple mechanical spreading method, it solves the problem that the real powder and granular blank elements cannot produce rich texture patterns that can be designed freely or transition naturally through mechanical spreading. The ceramic plate of the present invention has the whole body effect of real powder and granular blank elements, can contain random inkjet texture effect at any position in the blank, and also has a natural and rich designable three-dimensional layered pattern texture formed by digital printing infiltration of a certain thickness and with surface color changes.

[0023] 3) During the infiltration process of ordinary ceramic ink, each raw material in the raw material layout body (pre-pressed body) has different material body gaps (density of raw materials), which can form different adsorption capacities for ceramic ink, thereby affecting the penetration depth of ceramic ink. Shallow penetration still has bright colors, while deep penetration has relatively dull colors. Therefore, different penetration depths of the raw material layout body directly form bright colors of different areas on the surface of the ceramic plate. Due to the different penetration depths, the ceramic ink can present color effects of different dimensions within a certain thickness space on the surface of the blank (viewed from any cross section of the plate). At the same time, raw materials with different densities will form different surface roughness and flatness after firing and melting. The surface with higher density will be relatively smoother and flatter after firing. Since light can achieve greater reflection ability on a smooth and flat surface, the color difference of different dimensions is deepened in turn, and the visual color of the pattern is more obvious. Therefore, the combination of the two can achieve richer and more varied color visual effects in different directions and angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Shown is a schematic diagram of the original stone porcelain plate prepared in Example 1;

[0025] Figure 2 Shown is a partial enlarged view of the cross section of the original stone porcelain plate obtained in Example 1;

[0026] Figure 3 Shown is a photograph of the raw stone porcelain plate prepared in Example 1.

[0027] Among them, 1: represents the coarse powder area; 2: represents the fine powder area; 3: represents flaky particles; 4: represents the powder containing inkjet texture; 11: represents the inkjet layer of the coarse powder area; 21: represents the inkjet layer of the fine powder area; 31: represents the inkjet layer of flaky particles. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention, so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0029] Example 1

[0030] A raw stone porcelain plate with multi-dimensional color changes, the preparation method of which comprises the following steps:

[0031] (1) Preparation of green body material:

[0032] ① Weigh the raw materials: 20 parts of potassium sodium sand, 10 parts of ultra-white stone powder, 23 parts of ball clay, 9 parts of silica sand, 5 parts of polishing mud, 6 parts of medium-temperature sand, 5 parts of alumina, 5 parts of pyrophyllite, 6 parts of bentonite, 6 parts of diopside, 5 parts of high clay, 0.3 parts of debonding agent (Duramax D-3019), 0.3 parts of water reducing agent (sodium silicate), 0.4 parts of reinforcing agent (vinyl acetate), add the above raw materials and water in a mass ratio of 3:1 into a ball mill for ball milling, color addition and stirring, and spray powdering to prepare a coarse powder with a particle size range of 150μm-350μm, and the moisture content of the powder is 7%;

[0033] In this embodiment, the chemical composition of the powder includes, by mass percentage: SiO 2 65%、Al 2 O 3 22%, CaO1.3%, MgO 0.9%, K 2 O 1.8%, Na 2 O 3.3%, the rest is loss on ignition and impurities;

[0034] ② Crushing the powder in ① into fine powder with a particle size range of 60μm-125μm;

[0035] ③ Preparation of flake particles: feeding the powder in ① (the fine powder in ② may also be used in other embodiments) into a granulator for pre-pressing into flakes; then crushing into flake particles with a maximum diameter of less than 10 mm, a minimum diameter of more than 1.5 mm, and a thickness of less than 2 mm, and the moisture content of the particles is 7%;

[0036] (2) First fabric:

[0037] The blank materials of ①, ②, and ③ are arranged in predetermined zones on the carrier by means of a material distribution device. Specifically, the blank materials of ①, ②, and ③ are arranged in predetermined zones respectively by means of a material distribution grid to form zoned layout materials;

[0038] (3) Predetermined pressure: The blank material after the predetermined partition layout on the carrier is pressed as a whole (the pressure is 1 bar) to form a pre-pressed body;

[0039] (4) First inkjet printing: inkjet printing is performed on the pre-pressed body;

[0040] (5) Second material distribution: the printed and unprinted layout materials of the pre-pressed body are flipped onto the next carrier to form a raw material layout body, wherein the printed layout materials can be neatly packed, scattered, or randomly occupied in the layout body during the flipping process;

[0041] (6) Light pressing: The raw material structure is lightly pressed (pressure is 70 bar) so that the volume density of the raw material structure after light pressing is 0.62 g / cm 3 ;

[0042] (7) Second inkjet printing: inkjet printing is performed on the raw material structure after light pressing;

[0043] (8) Pre-drying: Pre-drying the surface of the raw material layout body after inkjet printing, wherein the drying temperature is 150° C. and the drying time is 30 seconds;

[0044] (9) Pressing: The raw material layout body after surface pre-drying is pressed into a green body, wherein the pressure of the press is 290 bar, and the volume density of the green body is 2.4 g / cm 3 ;

[0045] (10) Drying: Drying the green body, wherein the drying temperature is 250° C., the drying time is 45 min, and the moisture content of the green body after drying is controlled to be no more than 0.3%;

[0046] (11) Firing: The dried green body is put into a kiln for firing to obtain a ceramic plate, wherein the highest firing temperature is 1180°C and the firing cycle is 60 minutes. Its structure is as follows Figure 1 and Figure 2 The final ceramic plate is shown in the photo Figure 3 As shown, it can be seen with the naked eye that the produced porcelain panels have colors of different dimensions, that is, they present multi-dimensional colors, and the effect is more realistic, three-dimensional, and the color transition is natural.

[0047] It should be noted that in step (3) of other embodiments, the blank material may be first slightly pressurized as a whole to make the surface smoother (without affecting subsequent inkjet printing), and then the predetermined area may be lightly pressed (with a pressure of no more than 5 bar) to form an overall layout material including a local pre-pressed body; in step (4), the local pre-pressed body is inkjet printed.

[0048] Example 2

[0049] A raw stone porcelain plate with multi-dimensional color changes, the preparation method of which comprises the following steps:

[0050] (1) Preparation of green body material:

[0051] ① Weigh the raw materials: 18 parts of potassium sodium sand, 9 parts of ultra-white stone powder, 26 parts of ball clay, 10 parts of silica sand, 4 parts of polishing mud, 7 parts of medium-temperature sand, 4 parts of alumina, 6 parts of pyrophyllite, 5 parts of bentonite, 7 parts of diopside, 4 parts of high clay, 0.3 parts of debonding agent (Duramax D-3019), 0.3 parts of water reducing agent (sodium silicate), 0.4 parts of reinforcing agent (vinyl acetate), add the above raw materials and water in a mass ratio of 3:1 into a ball mill for ball milling, color addition and stirring, and spray powdering to prepare a coarse powder with a particle size range of 150μm-350μm, and the moisture content of the powder is 6%;

[0052] In this embodiment, the chemical composition of the powder includes, by mass percentage: SiO 2 66.2%、Al 2 O 3 20.8%, CaO1.1%, MgO 1.2%, K 2 O 2.1%, Na 2 O 2.9%, the rest is loss on ignition and impurities;

[0053] ② Crushing the powder in ① into fine powder with a particle size range of 60μm-125μm;

[0054] ③ Preparation of flaky particles: The fine powder obtained in ② (the coarse powder in ① may also be used in other embodiments) is made into a mud material with a moisture content of 20%, extruded, cut, and then dried to form a flaky body; and then crushed into flaky particles with a maximum diameter of less than 10 mm, a minimum diameter of more than 1.5 mm, and a thickness of less than 2 mm, and the moisture content of the particles is 6%;

[0055] (2) First fabric:

[0056] After mixing the blank materials of ①, ② and ③, they are laid out flat on the carrier through a material distribution device. Specifically, the blank materials of ①, ② and ③ are first mixed according to a predetermined ratio through a material mixing device, and then the mixed material is directly laid out on the carrier through the material distribution device to form an overall flat layout;

[0057] (3) Predetermined pressure: The green body material on the carrier is pressed as a whole (the pressure is 0.5 bar) to form a pre-pressed body;

[0058] (4) First inkjet printing: inkjet printing is performed on the pre-pressed body;

[0059] (5) Second material distribution: the printed and unprinted layout materials of the pre-pressed body are flipped onto the next carrier to form a raw material layout body, wherein the printed layout materials can be neatly packed, scattered, or randomly occupied in the layout body during the flipping process;

[0060] (6) Light pressing: The raw material structure is lightly pressed (pressure is 90 bar) so that the volume density of the raw material structure after light pressing is 0.78 g / cm 3 ;

[0061] (7) Second inkjet printing: inkjet printing is performed on the raw material structure after light pressing;

[0062] (8) Pre-drying: Pre-drying the surface of the raw material layout body after inkjet printing, wherein the drying temperature is 120° C. and the drying time is 40 seconds;

[0063] (9) Pressing: The raw material layout body after surface pre-drying is pressed into a green body, wherein the pressure of the press is 260 bar, and the volume density of the green body is 2.3 g / cm 3 ;

[0064] (10) Drying: Drying the green body, wherein the drying temperature is 200° C., the drying time is 60 min, and the moisture content of the green body after drying is controlled to be no more than 0.3%;

[0065] (11) Firing: The dried green body is put into a kiln for firing to produce a ceramic plate, wherein the maximum firing temperature is 1160°C and the firing cycle is 80 minutes.

[0066] Example 3

[0067] A raw stone porcelain plate with multi-dimensional color changes, the preparation method of which comprises the following steps:

[0068] (1) Preparation of green body material:

[0069] ① Weigh the raw materials: 22 parts of potassium sodium sand, 11 parts of ultra-white stone powder, 20 parts of ball clay, 8 parts of silica sand, 6 parts of polishing mud, 5 parts of medium-temperature sand, 6 parts of alumina, 4 parts of pyrophyllite, 7 parts of bentonite, 5 parts of diopside, 6 parts of high clay, 0.3 parts of debonding agent (Duramax D-3019), 0.3 parts of water reducing agent (sodium silicate), 0.4 parts of reinforcing agent (vinyl acetate), add the above raw materials and water in a mass ratio of 3:1 into a ball mill for ball milling, color addition and stirring, and spray powdering to prepare a coarse powder with a particle size range of 150μm-350μm, and the moisture content of the powder is 8%;

[0070] In this embodiment, the chemical composition of the powder includes, by mass percentage: SiO 2 64.1%、Al 2 O 3 23.6%, CaO1.5%, MgO 0.7%, K 2 O 1.6%, Na 2 O 3.6%, the rest is loss on ignition and impurities;

[0071] ② Crushing the powder in ① into fine powder with a particle size range of 60μm-125μm;

[0072] ③Preparation of flake particles: directly dry the slurry after color addition and stirring in ① to form flakes; then crush it into flake particles with a maximum diameter of less than 10mm, a minimum diameter of more than 1.5mm, and a thickness of less than 2mm. The moisture content of the particles is 8%;

[0073] (2) First fabric:

[0074] After mixing the blank materials of ①, ② and ③, they are laid out flat on the carrier through a material distribution device. Specifically, the blank materials of ①, ② and ③ are first mixed according to a predetermined ratio through a material mixing device, and then the mixed material is directly laid out on the carrier through the material distribution device to form an overall flat layout;

[0075] (3) Predetermined pressure: The green body material on the carrier is pressed as a whole (the pressure is 2 bar) to form a pre-pressed body;

[0076] (4) First inkjet printing: inkjet printing is performed on the pre-pressed body;

[0077] (5) Second material distribution: the printed and unprinted layout materials of the pre-pressed body are flipped onto the next carrier to form a raw material layout body, wherein the printed layout materials can be neatly packed, scattered, or randomly occupied in the layout body during the flipping process;

[0078] (6) Light pressing: The raw material structure is lightly pressed (pressure is 50 bar) so that the volume density of the raw material structure after light pressing is 0.44 g / cm 3;

[0079] (7) Second inkjet printing: inkjet printing is performed on the raw material structure after light pressing;

[0080] (8) Pre-drying: Pre-drying the surface of the raw material layout body after inkjet printing, wherein the drying temperature is 200° C. and the drying time is 15 seconds;

[0081] (9) Pressing: The raw material layout body after surface pre-drying is pressed into a green body, wherein the pressure of the press is 320 bar, and the volume density of the green body is 2.5 g / cm 3 ;

[0082] (10) Drying: Drying the green body, wherein the drying temperature is 300° C., the drying time is 30 min, and the moisture content of the green body after drying is controlled to be no more than 0.3%;

[0083] (11) Firing: The dried green body is put into a kiln for firing to produce a ceramic plate, wherein the maximum firing temperature is 1200°C and the firing cycle is 40 minutes.

[0084] The ceramic plate product obtained in the above embodiment has the full-body effect of real powder and granular body elements, contains random inkjet texture effects at any position in the body, and also has a multi-dimensional color layer with a natural and rich three-dimensional layered pattern texture with surface color changes formed by digital printing infiltration of a certain thickness. Since the inkjet texture has a certain penetration depth, there is no need to add a protective layer on the surface to prevent the texture from being stepped on and worn off, and the pattern texture can be maintained for a long time. The product obtained in Example 1 was tested, and the water absorption was determined to be 0.3% according to GB / T 3810.3, and the wear resistance depth was 150mm according to GB / T 3810.6. 2 According to GB / T 3810.14-2016, the pollution resistance is level 5. It can be seen that this product has good physical properties and can meet any decoration and renovation applications.

[0085] The above is only a preferred embodiment of the present invention. The present invention is not limited to the above implementation. As long as the technical effect of the present invention is achieved by the same means, it should belong to the protection scope of the present invention. Within the protection scope of the present invention, its technical scheme and / or implementation method can have various modifications and changes.

Claims

1. A method for preparing a raw stone porcelain plate, characterized in that: The following steps are involved: The blank material is laid out flat and pre-pressed to obtain a pre-pressed body, the surface of the pre-pressed body is firstly ink-sprayed, and after the ink penetrates, it is turned over to obtain a raw material layout body, and the raw material layout body is lightly pressed to make its volume density less than 0.8g / cm 3 , then perform a second inkjet process, and after the ink penetrates, perform pressing and forming, and then dry and fire to obtain the raw stone porcelain plate; The blank material includes flaky particles, coarse powder and fine powder; the flaky particles have a widest diameter less than 10 mm, a narrowest diameter greater than 1.5 mm and a thickness less than 2 mm; the coarse powder has a particle size of 150 μm-350 μm; the fine powder has a particle size of 60 μm-125 μm.

2. The preparation method according to claim 1, characterized in that: Pre-drying is also performed before the compression molding.

3. The preparation method according to claim 1, characterized in that: The flaky particles, the coarse powder material and the fine powder material are mixed and laid out in a flat layout, or the flaky particles, the coarse powder material and the fine powder material are laid out in a flat layout according to preset partitions.

4. The preparation method according to claim 1, characterized in that: The coarse powder is obtained by subjecting the raw materials to ball milling, coloring, stirring, and spraying; the fine powder is obtained by crushing the coarse powder; and the flaky particles are obtained by making the coarse powder and / or the fine powder into flaky bodies and then crushing them.

5. The preparation method according to claim 1, further characterized in that the ink used in the first inkjet is a non-permeable ceramic ink; the ink used in the second inkjet is a non-permeable ceramic ink, or a combination of a non-permeable ceramic ink and a functional ink.

6. The preparation method according to claim 1, characterized in that: After firing, there are also cutting and polishing steps.

7. A raw stone ceramic plate, characterized in that: The raw stone porcelain plate is prepared by the preparation method described in any one of claims 1 to 6.

8. The raw stone porcelain plate according to claim 7, characterized in that: The surface of the raw stone porcelain plate also includes a transparent glaze protective layer, or contains a spray-printed pattern and a glaze decorative layer.

9. The raw stone porcelain plate according to claim 7, characterized in that: The thickness of the raw stone ceramic plate is greater than 5 mm.

10. The raw stone porcelain plate according to claim 7, characterized in that: The raw stone porcelain slab has a whole body texture and a multi-dimensional color layer within a thickness range of 2 mm from the surface downward.

Images