CN114507087B

CN114507087B - Natural texture decorative rock plate and preparation method thereof

Info

Publication number: CN114507087B
Application number: CN202210231742.XA
Authority: CN
Inventors: 钟树铭; 李华云; 刘云飞; 夏昌奎; 王美霞; 余剑峰; 田祖鸿; 李涛
Original assignee: Hangzhou Nabel Ceramic Co ltd; Jiujiang Nabel Ceramic Co ltd; Deqing Nabel Ceramic Co ltd
Current assignee: Hangzhou Nabel Ceramic Co ltd; Jiujiang Nabel Ceramic Co ltd; Deqing Nabel Ceramic Co ltd
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2023-09-01
Anticipated expiration: 2042-03-09
Also published as: CN114507087A

Abstract

The invention discloses a preparation method of a natural texture decorative rock plate, which comprises the following steps: A. preparing blank powder according to a conventional method; B. the digital pulp distribution system is prepared from pulp; C. shaping; D. drying the blank; E. digital cloth slurry; F. drying again; G. pattern decoration; H. firing; I. edging to obtain the natural texture decorative rock plate. According to the invention, the water-based ceramic slurry can be positioned and applied according to the preset pattern textures, the formed natural texture decorative effect has obvious concave-convex three-dimensional texture, and the limitation that the slurry with different compositions and/or colors can only realize linear flow lines in the traditional slurry distribution can be broken through, so that the lines of the slurry for the digital slurry distribution system with two chemical compositions can be arranged at will, the texture of the natural stone-like stone formed by the slurry distribution is clearer, more vivid, three-dimensional and finer by matching a plurality of nozzle arrays, and the pattern and line effects are richer and progressive transition effects are good.

Description

Natural texture decorative rock plate and preparation method thereof

Technical Field

The invention relates to a rock plate and a preparation method thereof, in particular to a natural texture decorative rock plate and a preparation method thereof.

Background

Along with the continuous development of social economy, the requirements of people on life quality and living environment are also continuously improved, so that the natural stone-like decorative material is very popular with people.

At present, the texture of natural stone is simulated by utilizing various technological means and materials in the market, and the method mainly starts from two aspects: on the one hand, patterns formed by printing decoration are firstly formed on a glaze layer on the surface of a green body in the modes of ink-jet printing, roller printing, screen printing and the like, and then a layer of transparent protective glaze is covered on the patterns. However, the decorative effect obtained by such a method of ink-jet printing is relatively easy to imitate and extremely easy to imitate, and the ink for ink-jet printing and the ink for roll printing and screen printing are oily and the amount of the ink used cannot be too large, otherwise, oily patterns are separated from the aqueous protective glaze to generate underglaze, thereby generating defects. On the other hand, the fabric is a dry fabric and a wet fabric, the dry fabric is generally obtained by stamping the fabric by a dry method, and polishing the fabric after being molded by a press, but the surface pattern of the manufactured product is dull and monotonous, the three-dimensional layering is not strong, and the fabric is distributed by a wet method, ceramic slurry is sprayed onto a rock plate blank by a distribution pipeline to form the texture of the imitated natural stone pattern, the texture is often influenced by the mixing effect of the pigments of the ceramic slurry, the uniform mixing of the slurries with different colors is usually carried out, the layering effect of the color slurries is not obvious, the mixing degree of the pigments is poor, the distribution trend of the slurry on the surface of the rock plate blank is difficult to control, and the formed imitated natural stone has the problems of insufficient clear and vivid texture effect, single pattern and line effect and poor transition property.

CN201310368652.6 discloses a ceramic tile decorating apparatus and a decorating method, the ceramic tile decorating apparatus of the invention adopts a glaze mixer to mix decorative slurries with different colors, and then the decorative slurries are sprayed on the surface of a green brick through a glaze spraying bell jar, and decorative slurries with different colors and mixing degree can be regulated by changing the flow velocity of the decorative slurries, and rich textures can be formed by matching with the speed change of a conveyor belt. Although the method has low cost and convenient modification, the formed patterns are not abundant, and the control is relatively difficult due to the fact that the flow patterns are the main ones.

Disclosure of Invention

The invention provides a preparation method of a natural texture decorative rock plate, which aims to solve the technical problems that the patterns of the existing rock plate products are not natural and rich, the textures are not clear and vivid enough and the patterns of the glazing process in production are difficult to control.

It is another object of the present invention to provide a natural texture finishing rock plate prepared by the method.

In order to achieve the first object, the present invention adopts the following technical scheme: the preparation method of the natural texture decorative rock plate is characterized by comprising the following steps of:

A. preparing blank powder for later use according to a conventional method;

B. the slurry for the digital slurry distribution system is prepared by: weighing mineral raw materials according to the designed chemical composition of the slurry for the digital slurry distribution system, adding a certain proportion of dispergator, suspending agent and water for ball milling, and preparing the slurry for the digital slurry distribution system;

C. And (3) forming: pressing and forming the blank powder prepared in the step A to form a natural texture decorative rock blank body;

D. drying the green body: c, drying the natural texture decorative rock plate blank body formed in the step C according to a conventional method;

E. digital cloth slurry: the digital pulp distribution system is adopted to apply the pulp prepared in the step B on the surface of the natural texture decorative rock plate blank body after the step D is dried according to the preset texture;

F. and (5) drying again: e, drying the natural texture decorative rock plate blank body subjected to the digital pulp distribution in the step E again according to a conventional method;

G. pattern decoration: f, printing pattern textures on the surface of the natural texture decorative rock plate blank body after the re-drying in the step F according to the preset pattern texture requirement;

H. firing: placing the natural texture decorative rock plate blank body subjected to pattern decoration in the step G into a roller kiln for firing, wherein the firing temperature is 1150-1250 ℃, and the firing period is 60-150 min, so as to obtain a natural texture decorative rock plate semi-finished product;

I. edging: performing edging treatment on the natural texture decorative rock plate semi-finished product obtained by sintering in the step H by using conventional edging equipment to obtain a natural texture decorative rock plate finished product;

the slurry for the digital slurry distribution system has two different chemical compositions.

In the above steps, conventional control means in the prior art are adopted unless specifically described.

To accomplish the second object, a natural texture decorative rock plate prepared according to the above steps is used.

Further, the slurry for the digital pulp distribution system in the step B has any two of the following three chemical compositions: the first chemical composition of the slurry for the digital slurry distribution system comprises the following components in percentage by weight: siO (SiO) ₂ 45%~50%，Al ₂ O ₃ 12%~16%，CaO 11%~15%，MgO 5%~8%，K ₂ O 1.5%~3%，Na ₂ O 1.5%~3%，BaO 3%~7%，ZnO 1%~3%，B ₂ O ₃ 0.5%~3%，Fe ₂ O ₃ ≤0.5%，TiO ₂ The firing loss is less than or equal to 0.3 percent and less than or equal to 12 percent, and the firing temperature of the slurry for the digital cloth slurry system with the first chemical composition is lower and is used for forming the transparent bright surface glaze effect; the second chemical composition of the slurry for the digital slurry distribution system comprises the following components in percentage by weight: siO (SiO) ₂ 43%~49%，Al ₂ O ₃ 20%~25%，CaO 5%~10%，MgO 1.5%~4%，K ₂ O 0.5%~2%，Na ₂ O 1.5%~3%，BaO 4%~8%，ZnO 1.5%~4%，B ₂ O ₃ 0.5%~3%，Fe ₂ O ₃ ≤0.5%，TiO ₂ The firing loss is less than or equal to 0.3 percent, the firing temperature of the slurry for the digital cloth slurry system with the second chemical composition is higher than that of the slurry for the first digital cloth slurry system, and the slurry is used for forming a semitransparent matte glaze effect; digital pulp distribution systemThe third chemical composition of the slurry is as follows by weight percent: siO (SiO) ₂ 62%~68%，Al ₂ O ₃ 20%~23%，CaO 0.1%~0.7%，MgO 0.05%~0.2%，K ₂ O 3.5%~5%，Na ₂ O 2.5%~3.5%，ZrO ₂ 1%~3%，Fe ₂ O ₃ ≤0.5%，TiO ₂ The firing loss is less than or equal to 0.5 percent and less than or equal to 8 percent, and the firing temperature of the slurry for the digital cloth slurry system with the third chemical composition is higher and is used for forming the opalescent matte porcelain surface effect.

And (C) adding pigment into the slurry for the digital cloth slurry system in the step (B) to prepare the slurry for the colored digital cloth slurry system.

Further, the specific gravity of the slurry for the digital slurry distribution system in the step B is 1.20-1.85 g/cm ³ The flow rate of the 50mL flow rate cup is 10-25 s, the viscosity is 40-500 mPa.s, the surface tension is 50-70 mN/m, the Reynolds number is 5-50, the Weber number is 70-130, and the bond number is 0.12-0.25.

Specific gravity, flow rate, viscosity and surface tension belong to conventional physical property parameters, while reynolds number, weber number and bond number belong to dimensionless numbers. Wherein the Reynolds number is a dimensionless number which can be used to characterize the fluid flow, expressed as Re, and is a measure of the ratio of the fluid inertial force to the viscous force, expressed as follows: re=dv ρ/μ. In the invention, d is the diameter of the slurry, namely the diameter of the slurry flowing through a pipeline, v is the slurry injection speed, ρ is the slurry specific gravity, μ is the slurry viscosity, when the Reynolds number is smaller, the influence of the viscous force on the flow field is larger than the inertial force, the disturbance of the flow velocity in the flow field is attenuated due to the viscous force, and the fluid flow is stable and laminar; on the contrary, if the Reynolds number is larger, the influence of the inertia force on the flow field is larger than the viscous force, the fluid flow is unstable, the tiny change of the flow velocity is easy to develop and strengthen, and the turbulence is formed.

The weber number represents the ratio of inertial force to surface tension effect, expressed as We, and can be expressed by the following formula: we=ρv ² d/gamma. In the present invention, ρ is the specific gravity of the slurry, v is the jet velocity of the slurry, d is the diameter of the slurry, i.e., the diameter of the slurry flowing through the pipe, γ is the surface tension of the slurry, and the smaller the Weber number, the more important the surface tension, such as capillary phenomenon,Small scale problems such as soap bubbles and surface tension waves. Generally, large scale problems, weber numbers well above 1.0, have negligible effect on surface tension.

The bond number is a dimensionless number determined by the effect of surface tension, and is represented by Bo, and can be represented by the following formula: bo=ρgd ² /gamma. In the invention, ρ is the specific gravity of the slurry, g is the acceleration of gravity, d is the diameter of the slurry, i.e. the diameter of the slurry flowing through the pipe, γ is the surface tension of the slurry, the bond number represents the ratio of gravity to surface tension, and when the effect of gravity is less than the surface tension, the surface tension dominates and the liquid is spherical.

It should be noted that the slurry injection speed v involved in the three dimensionless number calculations of the Reynolds number, the Weber number and the bond number is not the 50mL flow rate cup flow rate 10-25 s of the slurry for the digital slurry distribution system, and the 50mL flow rate cup flow rate 10-25 s of the slurry for the digital slurry distribution system is the time required for the 50mL slurry for the digital slurry distribution system to flow under the action of gravity in the 50mL flow rate cup.

The traditional ink jet device adopts organic solvent type ceramic ink or organic solvent type digital glaze, and is characterized in that the granularity of the ceramic ink or the digital glaze needs to be controlled to be not more than 0.85 mu m (the granularity of 99 percent of particles in the cumulative distribution of granularity is not more than 0.85 mu m), and in order to ensure that the organic solvent type ceramic ink or the organic solvent type digital glaze has good jet printing performance, more liquid dispersing agent, liquid stabilizing agent, liquid suspending agent, solvent and the like need to be introduced, so that the solid content of the organic solvent type ceramic ink or the organic solvent type digital glaze is not more than 50 percent, and therefore, the Reynolds number, weber number, bond number and other dimensionless numerical control of the organic solvent type ceramic ink or the organic solvent type digital glaze is easy. The slurry for the digital slurry distribution system adopted by the application is water-based ceramic slurry, the fineness of the slurry is controlled to be about 45 mu m (the particle size of 99% of particles in the particle size accumulation distribution is not more than 45 mu m), and the particle size of the slurry is mostly more than 1 mu m, and the solid content of the slurry is not less than 60%, so compared with organic solvent type ceramic ink or organic solvent type digital glaze, the water-based ceramic slurry has coarser particle size, easier sedimentation, difficult control of suspension property, moisture retention and other performances, and larger control difficulty of Reynolds number, weber number, bond number and other non-dimensional numbers related to the rheological parameters such as viscosity, surface tension, specific gravity and the like.

According to the knowledge of fluid mechanics, the Reynolds number Re < 2300 is in a laminar state, the Reynolds number Re < 4000 is in a transitional state, and the Reynolds number Re > 4000 is in a turbulent state. Obviously, the slurry for the digital slurry distribution system is in a laminar flow state and limited to 5-50, and on one hand, the slurry for the digital slurry distribution system is water-based ceramic slurry formed by mixing and grinding minerals such as natural clay, feldspar, quartz and the like, the specific gravity, the viscosity, the flow speed and other basic rheological performance parameters are in a range, and the caliber of emergent slurry which can be provided by a current limiting mechanism in the digital slurry distribution system is smaller, namely the diameter d of emergent slurry is smaller, so that the Reynolds number of the slurry for the digital slurry distribution system is in a laminar flow state; on the other hand, although increasing the reynolds number of the slurry for the digital slurry distribution system is favorable for the flow transmission of the slurry for the digital slurry distribution system in the slurry distribution device, the increasing reynolds number can obviously influence the printing effect of the slurry on the surface of the blank, and referring to the first point, the slurry for the digital slurry distribution system is water-based ceramic slurry formed by mixing and grinding minerals such as natural clay, feldspar, quartz and the like, therefore, the reynolds number is also limited, if the reynolds number is increased, the solid content of the slurry needs to be obviously reduced, namely the water content of the slurry is increased, the pattern texture effect on the surface of the blank is realized by the solid components in the slurry, if the reynolds number is excessively pursued, the water content of the slurry is excessively large, the solid components attached to the surface of the blank are difficult to be greatly reduced, the concave-convex three-dimensional hierarchical texture is difficult to be realized, the blank is adhered with the solid components by absorbing the water in the slurry, if the excessive water is absorbed, the blank strength is easily caused to be excessively low, the defects such as edge breakage, cracking and the like are caused by insufficient strength.

The Weber number represents the ratio of the inertia force to the surface tension effect, and the slurry for the digital slurry distribution system needs to be smoothly flowed and transmitted in the slurry distribution device, so that certain inertia force is needed to prevent the slurry from being blocked in a pipeline.

The bond number represents the ratio of gravity to surface tension, the concave-convex three-dimensional texture on the surface of the blank body is formed by arranging innumerable small liquid drops according to the preset texture requirement, for each small liquid drop, if the gravity action is larger than the surface tension action, the small liquid drop is easy to be spread out on the surface of the blank body, and the realization of fine texture is unfavorable, like the pixels on a liquid crystal display screen, the more the pixels are, the clearer the image is, the fewer the pixels are, the more the image is blurred, if each small liquid drop is spread out completely, the small liquid drops are necessarily overlapped, the macroscopic view is that the pattern formed by digital cloth slurry is blurred, and if the gravity action is smaller than the surface tension action, the small liquid drops are approximately spherical, can be combined with the blank body at a certain wetting angle, so that more positions can be reserved for the small liquid drops sprayed on the back, the pixels similar to the liquid crystal display screen are more, the images are clearer, and the pattern formed by the digital cloth slurry is more favorable for forming the concave-convex three-dimensional hierarchy on the macroscopic view. The bonding number of the slurry for the digital slurry distribution system is 0.12-0.25, and clear three-dimensional pattern texture layers can be displayed.

Further, a step of applying base slurry is added between the step D and the step E, wherein the base slurry is prepared by weighing mineral raw materials according to the designed chemical composition of the base slurry, adding a certain proportion of dispergator, suspending agent and water and performing ball milling. The base paste is applied by adopting one of a spraying disc and a glaze spraying cabinet.

Further, the pulp distribution system in the step E comprises a computer control system and a pulp distribution device; the slurry distribution device comprises a nozzle array formed by combining a plurality of nozzles; the spray head comprises a filtering device, a digital flowmeter, a slurry distribution signal input end, a spray head cavity, an extrusion device, a buffer cavity and a flow limiting mechanism; the lower end of the extrusion device is made of transparent material, and an infrared signal generator is coated in the transparent material; the extrusion device is of a stepped bulge structure, each layer of steps are telescopic and movable, and the diameter of the bottom surface of the cylindrical bulge is smaller as the lower end of each layer of steps is closer to the lower end of each layer of steps; the inner wall of the buffer cavity is covered with a layer of hydrophobic film; the buffer cavity is of a stepped concave structure, and the diameter of the circular cavity is smaller as the buffer cavity is closer to the lower end; the extrusion device of the stepped bulge structure is matched with the buffer cavity of the stepped concave structure, so that the stepped printing effect with different gray scales can be realized; the flow limiting mechanism comprises a telescopic baffle and a flushing device; the upper end of the telescopic baffle is made of transparent silica gel, and an infrared signal receiver is coated in the transparent silica gel and is used for receiving an infrared signal sent by an infrared signal generator in the lower end of the extrusion device; the upper end of the flushing device is provided with a plurality of water outlets.

Further, the computer control system is used for controlling the slurry distribution device to distribute slurry according to preset textures.

Further, the nozzle array is a single-mode nozzle array formed by single rows of nozzles distributed in parallel at equal intervals, and can be suitable for pattern texture printing which is not particularly complex.

Furthermore, the nozzle array is a mosaic pattern nozzle array formed by double rows of nozzles distributed in parallel at equal intervals, and can be suitable for pattern texture printing with strong layering sense and fine textures.

Furthermore, the nozzle array is an interactive mode nozzle array with the cross distribution of the nozzles, and can be suitable for printing patterns and textures with rich colors, natural transition of colors and textures and gradual change.

Further, the filtering device is a screen, and the number of the screen meshes is 50-600 meshes.

Further, the filtering device is a screen, and the number of the screen meshes is 200-325.

Compared with the fineness requirement of the traditional ink jet decoration on the ink with the small particle size of not more than 0.85 mu m, the distribution system in the production of the digital spray decorative rock plate can expand 0.85 mu m to 45 mu m, namely the digital slurry distribution system can be suitable for slurry with the large particle size of 45 mu m. While the conventional ink jet device is generally used for spraying oily ink, the ink needs to be ground to 0.85 mu m, if the conventional ink jet device is used for spraying Shi Bushui base slurry, the water base slurry needs to be ground to 0.85 mu m, and the digital slurry distribution system only needs to grind the slurry to about 45 mu m, so that the electricity consumption generated by grinding can be remarkably reduced, and the electricity consumption per ton of slurry can be reduced from 2000-4000 DEG to 200 DEG as estimated initially.

In addition, if the slurry is ground too finely, other slurry rheology problems can be introduced. Such as a significant deterioration in thixotropy, which may be due to the fact that the slurry has a particle size that gradually decreases as the grinding time increases, but the slurry temperature also increases rapidly, resulting in partial failure of the debonder, while the negative effect on the debonder failure becomes more intense as the grinding time increases, eventually resulting in poor thixotropy of the slurry; still another point is that the slurry temperature is higher due to the great increase of the grinding time, and the ground slurry forms a layer of solid layer on the surface of the slurry due to the rapid evaporation of surface moisture in the standing process, namely, the common skinning defect in the production process, and the formed skinning is difficult to be completely broken through stirring in the subsequent use process, so that solid aggregates are formed, the slurry is uneven, and the appearance effect of the digital cloth slurry on the surface of a blank body is affected.

Further, the filter device is a honeycomb ceramic.

Further, the digital flowmeter can display the flow rate of the slurry flowing into the spray head in real time, and feed the flow rate back to the computer control system, and then the computer control system adjusts the flow rate of the slurry. The slurry flow rate referred to herein is the weight/volume of slurry passing through the meter per unit time. If the flow rate of the slurry is monitored to be too small, the digital flowmeter can be adjusted through the computer control system, so that the flow rate of the slurry is properly increased, because the too small flow rate of the slurry can affect the stable slurry supply to the spray head, so that the printing effect is unstable, if the digital flowmeter is still not obviously improved after being adjusted, the slurry is possibly thick, or a slurry supply channel is blocked, such as a filter device is blocked, because large particle aggregates or impurities in the slurry block meshes of the filter device, and the filter device needs to be replaced or cleaned at the moment. If the flow rate of the slurry is monitored to be too large, the digital flowmeter can be adjusted through the computer control system, so that the flow rate of the slurry is properly reduced, and because the flow rate of the slurry is too large, the flow limiting mechanism is easily impacted by the large slurry, so that the arc of the slurry sprayed from the flow limiting mechanism is unstable, and the printing effect is affected.

Further, the extrusion device is made of transparent silica gel.

Furthermore, the hydrophobic film is mixed with silicon carbide high-hardness substances, so that the friction loss condition between the extrusion device and the inner wall of the buffer cavity can be effectively improved, and the service life of the buffer cavity is prolonged.

Further, the retractable baffle is one of a cuboid structure and a semicircular structure.

Further, the flushing device is one of a cuboid structure and a semicircular structure.

Further, the telescopic baffle and the flushing device are both of cuboid structures, and a flow limiting mechanism formed by the telescopic baffle and the flushing device is of a cross structure; the telescopic baffle and the flushing device are of semicircular structures, and a flow limiting mechanism formed by the telescopic baffle and the flushing device is of a petal-shaped structure.

Further, the opening and closing gap of the telescopic baffle is controlled continuously by 0-100%.

Further, the working process of the slurry distribution system is as follows: when the conveying belt bears the rock plate blank body and moves to the lower end of the pulp distribution device, the computer control system drives the pulp distribution device to distribute pulp on the surface of the rock plate blank according to an input preset pulp distribution pattern, the pulp is filtered by the filtering device before entering the spray head, granular aggregates in the pulp are removed to prevent the spray head from being blocked, the pulp flows through the digital flowmeter and then enters the spray head cavity, when the pulp liquid level in the spray head cavity exceeds the inlet of the buffer cavity, namely, the pulp flows into the buffer cavity, and then a pulp distribution signal input end receives a digital signal given by the computer control system and drives the extrusion device to work; when the infrared signal generator at the lower end of the extrusion device and the infrared signal receiver at the upper end of the telescopic baffle monitor that the spray head is blocked, the spray head stops working and enters a cleaning state, at the moment, the telescopic baffle is completely stretched out, the flushing device is closed, and water is discharged and flushed by a water outlet at the upper end of the flushing device until the flushing device is completely stretched out when the infrared signal generator at the lower end of the extrusion device and the infrared signal receiver at the upper end of the telescopic baffle monitor a dredging state, and the telescopic baffle is closed again and enters a working state again.

Further, a step of applying protective glaze is added between the step E and the step F.

Further, the pattern decoration in the step G adopts a common ink-jet printing mode, and an ink-jet printer prints pattern textures on the surface of the natural texture decoration rock plate blank body after the step F is dried again.

Further, the pattern decoration in the step G adopts a penetration ink-jet printing mode, and an ink-jet printer prints pattern textures on the surface of the natural texture decoration rock plate blank body after the step F is dried again.

Further, when the step G adopts a common inkjet printing or a penetrating inkjet printing manner, a step of texture identification is added between the step F and the step G, wherein the texture identification is to identify the digital cloth pulp texture of the natural texture decorative rock plate blank surface after the step F is dried again by using an ultra-high definition digital camera, and send a network signal to an inkjet printer, and then the inkjet printer again retrieves the pattern texture corresponding to the digital cloth pulp texture, and the surface of the natural texture decorative rock plate blank after the step F is dried again is subjected to positioning inkjet printing pattern decoration.

Further, in the step G, pattern decoration adopts a screen printing mode, and a screen printer prints pattern textures on the surface of the natural texture decorative rock plate blank body after the step F is dried again.

Further, the pattern decoration in the step G adopts a rubber roll printing mode, and a rubber roll printer prints pattern textures on the surface of the natural texture decoration rock plate blank body after the step F is dried again.

Further, after the step I, a polishing process is adopted.

The beneficial effects of the invention are as follows: on the one hand, the traditional curtain coating type slurry distribution is characterized in that the whole surface of the slurry is covered on the surface of a green body in a superposition way, and the decoration on the surface of the green body is only limited to pure-color slurry after coloring materials are added, but the digital slurry distribution system in the preparation of the natural texture decorative rock plate inputs digital patterns through a computer control system and drives a slurry distribution device to distribute slurry for decoration, so that positioning and distribution can be carried out according to the required pattern texture, and if the slurry distribution pattern effect on the surface of the green body needs to be changed, only the digital patterns in the computer control system need to be replaced, the positioning and distribution can be realized, and the flexibility is better; on the other hand, although the traditional slurry distribution texture formed by spraying a plurality of slurry distribution pipelines is improved to a certain extent compared with the disk-type slurry distribution, a plurality of slurries with different compositions and/or colors can be simultaneously applied on the surface of a blank, but only the textures of the slurries with different compositions and/or colors can be realized in a mode of adjacent intervals, namely, only linear type flow marks can be displayed, the decoration effect is single, the layering effect of the color slurries is not obvious, the blending mixing degree among pigments is poor, the tendency of slurry distribution on the surface of a rock blank surface is difficult to control, the texture effect of the formed imitated natural stone is not clear and vivid, three-dimensional and fine, the pattern and line effect is single, the transition property is poor, the digital slurry distribution system in the preparation of the natural texture decoration rock plate inputs digital patterns through a computer control system, and drives a slurry distribution device to perform slurry distribution decoration, the invention can perform positioning and distributing according to the preset pattern texture, the gray level stepped printing design of the spray heads and the control of the flow limiting mechanism on the thickness of the pulp can perfectly realize the organic combination printing effect of the three of the point, the line and the surface on the same plane, on the one hand, the natural texture decorative effect formed by the invention has obvious concave-convex three-dimensional texture unlike the traditional plane superposition type pulp distribution effect, and the spray head array is combined, so that the limitation that the linear flow lines can only be realized by the pulp with different compositions and/or colors in the traditional pulp distribution can be broken through, the lines of the pulp can be distributed at will, the matching of the spray head arrays enables the texture of the imitated natural stone formed by the pulp distribution to be clearer, more vivid, three-dimensional and fine, the pattern and line effect to be richer, and the progressive transition effect to be good.

Drawings

Figure 1 is a schematic view of a pulp distribution device for distributing pulp to a rock plate blank;

wherein 1-frame, 2-transmission belt, 3-rock plate blank, 4-pulp distribution device and 4-1-spray head.

Figure 2 is a schematic top view of a pulp distribution device for distributing pulp to a rock plate blank;

wherein fig. 2a is a schematic plan view of a pulp distribution device for distributing pulp to a rock plate blank using a single mode nozzle array in a direction perpendicular to the advancing direction of a conveyor belt; FIG. 2b is a schematic top view of a slurry distribution device employing an array of mosaic pattern spray heads for distributing slurry to a rock laminate in a direction perpendicular to the direction of travel of the conveyor belt; FIG. 2c is a schematic top view of a slurry distribution device employing an alternating pattern nozzle array for distributing slurry to a rock plate blank in a direction perpendicular to the direction of travel of the conveyor belt; the arrow direction is the advancing direction of the conveying belt; 2-a conveying belt, 3-a rock plate blank body, 4-a slurry distribution device and 4-1-a spray head.

FIG. 3 is a schematic diagram of a spray head structure in the slurry distribution device;

wherein, 5-filtering device, 6-digital flowmeter, 7-shower nozzle cavity, 8-cloth thick liquid signal input, 9-extrusion device, 10-infrared signal transmitter, 11-buffer memory cavity, 12-hydrophobic film, 13-scalable baffle, 14-infrared signal receiver, the arrow direction is the direction that thick liquids got into the shower nozzle.

FIG. 4 is a schematic view of the extrusion device in a fully extended state in the buffer chamber;

wherein 9-extrusion device, 11-buffer cavity, 13-telescopic baffle.

FIG. 5 is a schematic diagram of the extrusion device and the buffer chamber in a state of performing guniting operation with a certain gray level;

wherein 9-extrusion device, 11-buffer cavity, 13-flow limiting mechanism.

FIG. 6 is a schematic view of an extrusion apparatus; wherein 9 is an extrusion device.

FIG. 7 is a schematic top view of a buffer chamber; wherein 11-a buffer cavity.

FIG. 8 is a schematic view of the operation of the flow restrictor in a cross-like configuration; wherein 14-an infrared signal receiver, 15-a telescopic baffle plate and 16-a flushing device.

FIG. 9 is a schematic view of a cleaning state of a flow restrictor in a cross-like configuration; wherein 14-an infrared signal receiver, 15-a telescopic baffle plate and 16-a flushing device.

FIG. 10 is a schematic view of the operation of the flow restrictor in a petal configuration; wherein 14-an infrared signal receiver, 15-a telescopic baffle plate and 16-a flushing device.

FIG. 11 is a schematic view of a petal-shaped structure of the flow restrictor in a cleaning state; wherein 14-an infrared signal receiver, 15-a telescopic baffle plate and 16-a flushing device.

Detailed Description

Example 1

As shown in fig. 1-11, the invention is implemented by the following steps:

A. preparing blank powder for later use according to a conventional method;

B. the slurry for the digital slurry distribution system is prepared by: mineral raw materials are weighed according to the designed chemical composition of the slurry for the digital slurry distribution system, a certain proportion of dispergator, suspending agent, pigment and water are added for ball milling, and two slurries for the colored digital slurry distribution system with different chemical compositions are respectively prepared: the chemical composition of the slurry for the digital slurry distribution system is as follows by weight percent: siO (SiO) ₂ 45%，Al ₂ O ₃ 16%，CaO 11%，MgO 8%，K ₂ O 1.5%，Na ₂ O 3%，BaO 3%，ZnO 3%，B ₂ O ₃ 0.5%，Fe ₂ O ₃ ≤0.5%，TiO ₂ The firing loss is less than or equal to 0.3 percent and less than or equal to 12 percent, the firing temperature of the slurry for the digital slurry distribution system is lower, and the slurry can be used for forming transparent bright surface glaze effect, and the other digitalThe chemical composition of the slurry for the slurry distribution system is as follows by weight percent: siO (SiO) ₂ 68%，Al ₂ O ₃ 20%，CaO 0.7%，MgO 0.05%，K ₂ O 5%，Na ₂ O 2.5%，ZrO ₂ 3%，Fe ₂ O ₃ ≤0.5%，TiO ₂ The firing loss is less than or equal to 0.5 percent and less than or equal to 8 percent, and the firing temperature of the slurry for the digital slurry distribution system is higher, so that the slurry can be used for forming the matte porcelain surface effect with the opacifying effect; the rheological property parameters of the slurry for the two digital slurry distribution systems are regulated to be consistent, and the specific gravity is 1.55g/cm ³ A 50 mL-flow cup flow rate of 20s, a viscosity of 135 mPa.s, a surface tension of 70mN/m, a Reynolds number of 18.4, a Weber number of 71, and a bond number of 0.14;

the digital pulp distribution system comprises a computer control system and a pulp distribution device 4; the pulp distribution device 4 comprises a spray head array formed by combining a plurality of spray heads; the spray head array is an inlaid mode spray head array formed by double rows of spray heads distributed in parallel at equal intervals; the spray head 4-1 comprises a filtering device 5, a digital flowmeter 6, a slurry distribution signal input end 8, a spray head cavity 7, an extrusion device 9, a buffer cavity 11 and a flow limiting mechanism 13; the lower end of the extrusion device 9 is made of transparent material, and an infrared signal transmitter 10 is coated in the transparent material; the extrusion device 9 is of a stepped bulge structure, each layer of steps are telescopic and movable, and the diameter of the bottom surface of the cylindrical bulge is smaller as the lower end of each layer of steps is closer to the lower end; the inner wall of the buffer cavity 11 is covered with a layer of hydrophobic film 12; the buffer cavity 11 is of a stepped concave structure, and the diameter of the circular cavity is smaller as the buffer cavity is closer to the lower end; the extrusion device 9 with the stepped convex structure is matched with the cache cavity 11 with the stepped concave structure, so that the stepped printing effect with different gray scales can be realized; the flow-limiting mechanism 13 comprises a telescopic baffle 15 and a flushing device 16; the upper end of the retractable baffle 15 is made of transparent silica gel, and an infrared signal receiver 14 is wrapped in the transparent silica gel and is used for receiving an infrared signal sent by an infrared signal transmitter 10 in the lower end of the extrusion device 9; a plurality of water outlets are distributed at the upper end of the flushing device 16; the telescopic baffle 15 and the flushing device 16 are of semicircular structures; the filtering device 5 is a screen, and the number of the screen meshes is 600 meshes;

The working process of the digital pulp distribution system is as follows: when a conveying belt 2 on a frame 1 bears a rock slab body 3 and moves to the lower end of a slurry distribution device 4, a computer control system drives the slurry distribution device 4 to distribute slurry on the surface of the rock slab body 3 according to an input preset slurry distribution pattern, the slurry needs to be filtered through a filtering device 5 before entering a spray head 4-1, granular aggregates in the slurry are removed to prevent the spray head 4-1 from being blocked, the slurry flows through a digital flowmeter 6 and then enters a spray head cavity 7, when the slurry liquid level in the spray head cavity 7 exceeds the inlet of a buffer cavity 11, namely flows into the buffer cavity 11, a slurry distribution signal input end 8 receives a digital signal given by a computer control system and drives an extrusion device 9 to work, the extrusion device 9 stretches out corresponding convex parts according to slurry required by a preset gray level step, the slurry is extruded out of a flow limiting mechanism 13, a telescopic baffle 15 of the flow limiting mechanism 13 is controlled by the computer control system, and the thickness and shape control of a line printed on the surface of the rock slab body 3 by adjusting an opening and closing gap; when the infrared signal transmitter 10 at the lower end of the extruding device 9 and the infrared signal receiver 14 at the upper end of the telescopic baffle 15 monitor that the spray head 4-1 is blocked, the spray head 4-1 stops working and enters a cleaning state, at the moment, the telescopic baffle 15 is fully stretched out, the flushing device 16 is closed, and water outlet flushing is carried out through a water outlet hole at the upper end of the flushing device 16 until the infrared signal transmitter 10 at the lower end of the extruding device 9 and the infrared signal receiver 14 at the upper end of the telescopic baffle 15 monitor a dredging state, the flushing device 16 is fully stretched out, the telescopic baffle 15 is closed again, and the working state is entered again;

G. pattern decoration: c, printing pattern textures on the surface of the natural texture decorative rock plate blank body after the re-drying in the step F by adopting a screen printing mode according to the preset pattern texture requirement;

H. firing: placing the natural texture decorative rock plate blank body subjected to pattern decoration in the step G into a roller kiln for firing, wherein the firing temperature is 1250 ℃, and the firing period is 60 minutes, so as to obtain a natural texture decorative rock plate semi-finished product;

I. edging: and D, performing edging treatment on the natural texture decorative rock plate semi-finished product obtained by sintering in the step H by using conventional edging equipment to obtain a natural texture decorative rock plate finished product.

Example 2

As shown in fig. 1-11, the invention is implemented by the following steps:

A. preparing blank powder for later use according to a conventional method;

B. the slurry for the digital slurry distribution system is prepared by: mineral raw materials are weighed according to the designed chemical composition of the slurry for the digital slurry distribution system, a certain proportion of dispergator, suspending agent, pigment and water are added for ball milling, and two slurries for the colored digital slurry distribution system with different chemical compositions are respectively prepared: the chemical composition of the slurry for the digital slurry distribution system is as follows by weight percent: siO (SiO) ₂ 50%，Al ₂ O ₃ 12%，CaO 15%，MgO 5%，K ₂ O 3%，Na ₂ O 1.5%，BaO 7%，ZnO 1%，B ₂ O ₃ 3%，Fe ₂ O ₃ ≤0.5%，TiO ₂ The firing loss is less than or equal to 0.3 percent and less than or equal to 12 percent, the firing temperature of the slurry for the digital cloth slurry system is lower, the slurry can be used for forming transparent bright surface glaze effect, and the chemical composition of the slurry for the other digital cloth slurry system is as follows by weight percent: siO (SiO) ₂ 62%，Al ₂ O ₃ 23%，CaO 0.1%，MgO 0.2%，K ₂ O 3.5%，Na ₂ O 3.5%，ZrO ₂ 1%，Fe ₂ O ₃ ≤0.5%，TiO ₂ The firing loss is less than or equal to 0.5 percent and less than or equal to 8 percent, and the firing temperature of the slurry for the digital slurry distribution system is higher, so that the slurry can be used for forming the matte porcelain surface effect with the opacifying effect; slurry for two digital slurry distribution systemsIs adjusted to be consistent with the rheological property parameter of 1.70g/cm ³ A 50 mL-flow cup flow rate of 20s, a viscosity of 110 mPa.s, a surface tension of 64mN/m, a Reynolds number of 24.8, a Weber number of 85.2, and a bond number of 0.17;

E. shi Bude pulp: the surface of the natural texture decorative rock slab body after the step D is dried is coated with base slurry by using a shower tray, wherein the base slurry is prepared by weighing mineral raw materials according to the chemical composition of the designed base slurry, adding a certain proportion of dispergator and suspending agent, and performing ball milling on the mixture;

F. digital cloth slurry: b, applying the slurry prepared in the step B on the surface of the natural texture decorative rock plate blank body after the bottom slurry is applied in the step E by adopting a digital slurry distribution system according to a preset texture;

The digital pulp distribution system comprises a computer control system and a pulp distribution device 4; the pulp distribution device 4 comprises a spray head array formed by combining a plurality of spray heads; the spray head array is an interactive mode spray head array with spray heads distributed in a crossed mode; the spray head 4-1 comprises a filtering device 5, a digital flowmeter 6, a slurry distribution signal input end 8, a spray head cavity 7, an extrusion device 9, a buffer cavity 11 and a flow limiting mechanism 13; the lower end of the extrusion device 9 is made of transparent material, and an infrared signal transmitter 10 is coated in the transparent material; the extrusion device 9 is of a stepped bulge structure, each layer of steps are telescopic and movable, and the diameter of the bottom surface of the cylindrical bulge is smaller as the lower end of each layer of steps is closer to the lower end; the inner wall of the buffer cavity 11 is covered with a layer of hydrophobic film 12; the buffer cavity 11 is of a stepped concave structure, and the diameter of the circular cavity is smaller as the buffer cavity is closer to the lower end; the extrusion device 9 with the stepped convex structure is matched with the cache cavity 11 with the stepped concave structure, so that the stepped printing effect with different gray scales can be realized; the flow-limiting mechanism 13 comprises a telescopic baffle 15 and a flushing device 16; the upper end of the retractable baffle 15 is made of transparent silica gel, and an infrared signal receiver 14 is wrapped in the transparent silica gel and is used for receiving an infrared signal sent by an infrared signal transmitter 10 in the lower end of the extrusion device 9; a plurality of water outlets are distributed at the upper end of the flushing device 16; the telescopic baffle 15 and the flushing device 16 are both of cuboid structures; the filtering device 5 is made of honeycomb ceramics;

G. And (5) drying again: c, drying the natural texture decorative rock plate blank body subjected to digital pulp distribution in the step F again according to a conventional method;

H. pattern decoration: according to the requirement of a preset pattern texture, printing the pattern texture on the surface of the natural texture decorative rock plate blank body after the re-drying in the step G by adopting a rubber roll printing mode by using a rubber roll printer;

I. firing: placing the natural texture decorative rock plate blank body subjected to pattern decoration in the step H into a roller kiln for firing, wherein the firing temperature is 1150 ℃, and the firing period is 150 minutes, so as to obtain a natural texture decorative rock plate semi-finished product;

J. edging and polishing: and (3) edging and polishing the natural texture decorative rock plate semi-finished product obtained by sintering in the step (I) by using conventional edging and polishing processing equipment to obtain a natural texture decorative rock plate finished product.

Example 3

As shown in fig. 1-11, the invention is implemented by the following steps:

A. preparing blank powder for later use according to a conventional method;

B. the slurry for the digital slurry distribution system is prepared by: mineral raw materials are weighed according to the designed chemical composition of the slurry for the digital slurry distribution system, a certain proportion of dispergator, suspending agent, pigment and water are added for ball milling, and two slurries for the colored digital slurry distribution system with different chemical compositions are respectively prepared: the chemical composition of the slurry for the digital slurry distribution system is as follows by weight percent: siO (SiO) ₂ 47%，Al ₂ O ₃ 14%，CaO 13%，MgO 6%，K ₂ O 2%，Na ₂ O 2.5%，BaO 5%，ZnO 2%，B ₂ O ₃ 2%，Fe ₂ O ₃ ≤0.5%，TiO ₂ The firing loss is less than or equal to 0.3 percent and less than or equal to 12 percent, the firing temperature of the slurry for the digital cloth slurry system is lower, the slurry can be used for forming transparent bright surface glaze effect, and the chemical composition of the slurry for the other digital cloth slurry system is as follows by weight percent: siO (SiO) ₂ 49%，Al ₂ O ₃ 20%，CaO 10%，MgO 1.5%，K ₂ O 2%，Na ₂ O 1.5%，BaO 8%，ZnO 1.5%，B ₂ O ₃ 3%，Fe ₂ O ₃ ≤0.5%，TiO ₂ The firing loss is less than or equal to 0.3 percent and less than or equal to 12 percent, and the firing temperature of the slurry for the digital slurry distribution system is higher than that of the slurry for the first digital slurry distribution system, so that the slurry can be used for forming a semitransparent matte glaze effect; the rheological property parameters of the slurry for the two digital slurry distribution systems are regulated to be consistent, and the specific gravity is 1.85g/cm ³ ，50mThe L flow rate cup has a flow rate of 25s, a viscosity of 500 mPa.s, a surface tension of 60mN/m, a Reynolds number of 5.9, a Weber number of 98.9 and a bond number of 0.19;

C. and (3) forming: pressing and molding the powder of the blank A prepared in the step to form a natural texture decorative rock blank body;

E. shi Bude pulp: the surface of the natural texture decorative rock slab body after the drying in the step D is coated with the primer by using a glaze spraying cabinet, wherein the primer is prepared by weighing mineral raw materials according to the chemical composition of the primer, adding a certain proportion of dispergator and suspending agent and ball-milling with water;

the digital pulp distribution system comprises a computer control system and a pulp distribution device 4; the pulp distribution device 4 comprises a spray head array formed by combining a plurality of spray heads; the spray head array is a single-mode spray head array formed by single-row spray heads distributed in parallel at equal distance; the spray head 4-1 comprises a filtering device 5, a digital flowmeter 6, a slurry distribution signal input end 8, a spray head cavity 7, an extrusion device 9, a buffer cavity 11 and a flow limiting mechanism 13; the lower end of the extrusion device 9 is made of transparent material, and an infrared signal transmitter 10 is coated in the transparent material; the extrusion device 9 is of a stepped bulge structure, each layer of steps are telescopic and movable, and the diameter of the bottom surface of the cylindrical bulge is smaller as the lower end of each layer of steps is closer to the lower end; the inner wall of the buffer cavity 11 is covered with a layer of hydrophobic film 12; the buffer cavity 11 is of a stepped concave structure, and the diameter of the circular cavity is smaller as the buffer cavity is closer to the lower end; the extrusion device 9 with the stepped convex structure is matched with the cache cavity 11 with the stepped concave structure, so that the stepped printing effect with different gray scales can be realized; the flow-limiting mechanism 13 comprises a telescopic baffle 15 and a flushing device 16; the upper end of the retractable baffle 15 is made of transparent silica gel, and an infrared signal receiver 14 is wrapped in the transparent silica gel and is used for receiving an infrared signal sent by an infrared signal transmitter 10 in the lower end of the extrusion device 9; a plurality of water outlets are distributed at the upper end of the flushing device 16; the telescopic baffle 15 and the flushing device 16 are of semicircular structures; the filtering device 5 is a screen, and the number of the screen meshes is 50 meshes;

G. Applying protective glaze: c, applying protective glaze to the surface of the digital guniting decorative rock plate blank body after digital guniting in the step F by adopting a glaze spraying cabinet;

H. and (5) drying again: c, drying the natural texture decorative rock slab body subjected to the protective glaze application in the step G again according to a conventional method;

I. texture recognition: c, adopting an ultra-high definition digital camera to identify the digital pulp distribution texture on the surface of the natural texture decorative rock plate blank body after the re-drying in the step H, and sending a network signal to an ink-jet printer;

J. pattern decoration: the ink-jet printer receives a network signal sent by the ultra-high definition digital camera, and calls pattern textures corresponding to the digital paste texture, and the texture positioning ink-jet printing is performed on the surface of the natural texture decorative rock plate blank body after the texture identification in the step I;

K. firing: placing the natural texture decorative rock plate blank body subjected to pattern decoration in the step J into a roller kiln for firing, wherein the firing temperature is 1200 ℃, and the firing period is 110 minutes, so as to obtain a natural texture decorative rock plate semi-finished product;

l, edging: and (3) performing edging treatment on the natural texture decorative rock plate semi-finished product obtained by sintering in the step (K) by using conventional edging processing equipment to obtain a natural texture decorative rock plate finished product.

Example 4

As shown in fig. 1-11, the invention is implemented by the following steps:

A. preparing blank powder for later use according to a conventional method;

B. the slurry for the digital slurry distribution system is prepared by: mineral raw materials are weighed according to the designed chemical composition of the slurry for the digital slurry distribution system, a certain proportion of dispergator, suspending agent, pigment and water are added for ball milling, and two slurries for the colored digital slurry distribution system with different chemical compositions are respectively prepared: the chemical composition of the slurry for the digital slurry distribution system is as follows by weight percent: siO (SiO) ₂ 43%，Al ₂ O ₃ 25%，CaO 7%，MgO 4%，K ₂ O 0.5%，Na ₂ O 3%，BaO 4%，ZnO 4%，B ₂ O ₃ 0.5%，Fe ₂ O ₃ ≤0.5%，TiO ₂ The burning loss is less than or equal to 0.3 percent and less than or equal to 12 percent, the slurry for the digital cloth slurry system can be used for forming semitransparent matte glaze effect, and the chemical composition of the slurry for the digital cloth slurry system is as follows by weight percent: siO (SiO) ₂ 64%，Al ₂ O ₃ 22%，CaO 0.3%，MgO 0.15%，K ₂ O 4.5%，Na ₂ O 2.8%，ZrO ₂ 2.5%，Fe ₂ O ₃ ≤0.5%，TiO ₂ The firing loss is less than or equal to 0.5 percent and less than or equal to 8 percent, and the firing temperature of the slurry for the digital slurry distribution system is higher, so that the slurry can be used for forming the matte porcelain surface effect with the opacifying effect; the rheological property parameters of the slurry for the two digital slurry distribution systems are regulated to be consistent, and the specific gravity is 1.20g/cm ³ A 50 mL-flow cup flow rate of 10s, a viscosity of 40 mPa.s, a surface tension of 50mN/m, a Reynolds number of 48, a Weber number of 76.9, and a bond number of 0.15;

the digital pulp distribution system comprises a computer control system and a pulp distribution device 4; the pulp distribution device 4 comprises a spray head array formed by combining a plurality of spray heads; the spray head array is an inlaid mode spray head array formed by double rows of spray heads distributed in parallel at equal intervals; the spray head 4-1 comprises a filtering device 5, a digital flowmeter 6, a slurry distribution signal input end 8, a spray head cavity 7, an extrusion device 9, a buffer cavity 11 and a flow limiting mechanism 13; the lower end of the extrusion device 9 is made of transparent material, and an infrared signal transmitter 10 is coated in the transparent material; the extrusion device 9 is of a stepped bulge structure, each layer of steps are telescopic and movable, and the diameter of the bottom surface of the cylindrical bulge is smaller as the lower end of each layer of steps is closer to the lower end; the inner wall of the buffer cavity 11 is covered with a layer of hydrophobic film 12; the buffer cavity 11 is of a stepped concave structure, and the diameter of the circular cavity is smaller as the buffer cavity is closer to the lower end; the extrusion device 9 with the stepped convex structure is matched with the cache cavity 11 with the stepped concave structure, so that the stepped printing effect with different gray scales can be realized; the flow-limiting mechanism 13 comprises a telescopic baffle 15 and a flushing device 16; the upper end of the retractable baffle 15 is made of transparent silica gel, and an infrared signal receiver 14 is wrapped in the transparent silica gel and is used for receiving an infrared signal sent by an infrared signal transmitter 10 in the lower end of the extrusion device 9; a plurality of water outlets are distributed at the upper end of the flushing device 16; the telescopic baffle 15 and the flushing device 16 are both of cuboid structures; the filtering device 5 is a screen, and the number of the screen meshes is 325 meshes;

F. Applying protective glaze: applying protective glaze to the surface of the natural texture decorative rock plate blank body after the step E of digital slurry distribution by adopting a shower tray;

G. and (5) drying again: c, drying the natural texture decorative rock slab body subjected to the protective glaze application in the step F again according to a conventional method;

H. texture recognition: c, adopting an ultra-high definition digital camera to identify the digital pulp distribution texture on the surface of the natural texture decorative rock plate blank body after the re-drying in the step G, and sending a network signal to an ink-jet printer;

I. pattern decoration: the ink-jet printer receives a network signal sent by the ultra-high definition digital camera, and calls pattern textures corresponding to the digital paste texture, and the texture positioning ink-jet printing is performed on the surface of the natural texture decorative rock plate blank body after the texture identification in the step H;

J. firing: placing the natural texture decorative rock plate blank body subjected to pattern decoration in the step I into a roller kiln for firing, wherein the firing temperature is 1210 ℃, and the firing period is 90 minutes, so as to obtain a natural texture decorative rock plate semi-finished product;

K. edging and polishing: and D, performing edging and polishing treatment on the natural texture decorative rock plate semi-finished product obtained by sintering in the step J by using conventional edging and polishing processing equipment to obtain a natural texture decorative rock plate finished product.

The above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, although the present invention has been described in detail with reference to the preferred embodiments, and it will be understood by those skilled in the art. Modifications and equivalent substitutions can be made to the specific embodiments of the present invention or to some of the technical features without departing from the spirit of the technical solution of the present invention, and they should be covered in the scope of the technical solution claimed in the present invention.

Claims

1. The preparation method of the natural texture decorative rock plate is characterized by comprising the following steps of:

A. preparing blank powder for later use according to a conventional method;

H. firing: placing the natural texture decorative rock plate blank body decorated in the step G into a roller kiln for firing, wherein the firing temperature is 1150-1250 ℃, and the firing period is 60-150 min, so as to obtain a natural texture decorative rock plate semi-finished product;

the slurry for the digital slurry distribution system has two different chemical compositions;

the slurry for the digital slurry distribution system in the step B has any two of the following three chemical compositions: the first chemical composition of the slurry for the digital slurry distribution system comprises the following components in percentage by weight: siO (SiO) ₂ 45％～50％，Al ₂ O ₃ 12％～16％，CaO 11％～15％，MgO 5％～8％，K ₂ O 1.5％～3％，Na ₂ O 1.5％～3％，BaO 3％～7％，ZnO 1％～3％，B ₂ O ₃ 0.5％～3％，Fe ₂ O ₃ ≤0.5％，TiO ₂ The firing loss is less than or equal to 0.3 percent and less than or equal to 12 percent, and the firing temperature of the slurry for the digital cloth slurry system with the first chemical composition is lower and is used for forming the transparent bright surface glaze effect; the second chemical composition of the slurry for the digital slurry distribution system comprises the following components in percentage by weight: siO (SiO) ₂ 43％～49％，Al ₂ O ₃ 20％～25％，CaO 5％～10％，MgO 1.5％～4％，K ₂ O 0.5％～2％，Na ₂ O 1.5％～3％，BaO 4％～8％，ZnO 1.5％～4％，B ₂ O ₃ 0.5％～3％，Fe ₂ O ₃ ≤0.5％，TiO ₂ The firing loss is less than or equal to 0.3 percent, the firing temperature of the slurry for the digital cloth slurry system with the second chemical composition is higher than that of the slurry for the first digital cloth slurry system, and the slurry is used for forming a semitransparent matte glaze effect; the third chemical composition of the slurry for the digital slurry distribution system comprises the following components in percentage by weight: siO (SiO) ₂ 62％～68％，Al ₂ O ₃ 20％～23％，CaO0.1％～0.7％，MgO 0.05％～0.2％，K ₂ O 3.5％～5％，Na ₂ O 2.5％～3.5％，ZrO ₂ 1％～3％，Fe ₂ O ₃ ≤0.5％，TiO ₂ The firing loss is less than or equal to 0.5 percent and less than or equal to 8 percent, and the firing temperature of the slurry for the digital cloth slurry system with the third chemical composition is higher and is used for forming the effect of the opalescent matte porcelain surface;

the specific gravity of the slurry for the digital slurry distribution system in the step B is 1.20-1.85 g/cm ³ The flow rate of the 50mL flow rate cup is 10 to 25s, the viscosity is 40 to 500 mPa.s, and the surface tension is 50 to 70mN/m;

the Reynolds number of the slurry for the digital slurry distribution system in the step B is 5-50, the Weber number is 70-130, and the bond number is 0.12-0.25;

the slurry for the digital slurry distribution system in the step B is water-based ceramic slurry, and the fineness of the slurry is controlled to be 45 mu m;

the pulp distribution system in the step E comprises a computer control system and a pulp distribution device; the slurry distribution device comprises a nozzle array formed by combining a plurality of nozzles; the spray head comprises a filtering device, a digital flowmeter, a slurry distribution signal input end, a spray head cavity, an extrusion device, a buffer cavity and a flow limiting mechanism; the lower end of the extrusion device is made of transparent material, and an infrared signal generator is coated in the transparent material; the extrusion device is of a stepped bulge structure, each layer of steps are telescopic and movable, and the diameter of the bottom surface of the cylindrical bulge is smaller as the lower end of each layer of steps is closer to the lower end of each layer of steps; the inner wall of the buffer cavity is covered with a layer of hydrophobic film; the buffer cavity is of a stepped concave structure, and the diameter of the circular cavity is smaller as the buffer cavity is closer to the lower end; the extrusion device of the stepped bulge structure is matched with the buffer cavity of the stepped concave structure, so that the stepped printing effect of different gray scales is realized; the flow limiting mechanism comprises a telescopic baffle and a flushing device; the upper end of the telescopic baffle is made of transparent silica gel, and an infrared signal receiver is coated in the transparent silica gel and is used for receiving an infrared signal sent by an infrared signal generator in the lower end of the extrusion device; the upper end of the flushing device is provided with a plurality of water outlets.

2. The method for preparing a natural texture decorative rock plate according to claim 1, wherein the slurry for the digital pulp distribution system in the step B is prepared by adding pigment into the slurry for the digital pulp distribution system.

3. A method of making a natural-grain decorated rock sheet according to claim 1, wherein a step of applying a primer is added between step D and step E.

4. A method of making a natural-grain decorative rock plate as in claim 3 wherein said primer is applied using one of a shower tray and a glaze spraying cabinet.

5. The method for manufacturing a natural-texture decorative rock plate according to claim 1, wherein the computer control system is used for controlling the slurry distribution device to distribute slurry according to a preset texture.

6. The method for manufacturing a natural-texture decorative rock plate according to claim 1, wherein the nozzle array is a single-mode nozzle array formed by single-row nozzles distributed in parallel at equal distances.

7. The method for manufacturing a natural-texture decorative rock plate according to claim 1, wherein the nozzle array is a mosaic-pattern nozzle array formed by double rows of nozzles distributed in parallel at equal intervals.

8. The method for manufacturing a natural-texture decorative rock plate according to claim 1, wherein the nozzle arrays are interactive pattern nozzle arrays with cross-distributed nozzles.

9. A method of making a natural-grain decorative rock laminate according to claim 1, wherein said filter means is a screen.

10. The method for producing a natural-texture decorative rock plate according to claim 9, wherein the mesh number is 50 to 600.

11. The method for producing a natural-texture decorative rock plate according to claim 10, wherein the mesh number is 200 to 325.

12. A method of making a natural-grain decorated rock sheet according to claim 1, wherein the filter device is a honeycomb ceramic.

13. The method for manufacturing a natural-texture decorative rock plate according to claim 1, wherein the digital flowmeter displays the flow rate of the slurry flowing into the spray head in real time, and feeds the flow rate back to the computer control system, and the computer control system adjusts the flow rate of the slurry.

14. The method for manufacturing a natural-texture decorative rock plate according to claim 1, wherein the extruding device is made of transparent silica gel.

15. The method for producing a natural-texture decorative rock plate according to claim 1, wherein the hydrophobic film is mixed with a silicon carbide-like high-hardness substance.

16. The method of manufacturing a natural-texture decorative rock plate of claim 1, wherein the retractable baffle and the flushing device are one of a rectangular parallelepiped structure and a semicircular structure.

17. The method for manufacturing a natural-texture decorative rock plate according to claim 16, wherein when the retractable baffle and the flushing device are both rectangular structures, the flow-limiting mechanism is formed in a cross-shaped structure; when the telescopic baffle and the flushing device are both in semicircular structures, the formed flow limiting mechanism is in a petal-shaped structure.

18. The method for manufacturing a natural-texture decorative rock plate according to claim 1, wherein the opening and closing gap of the retractable baffle is controlled continuously by 0-100%.

19. The method for preparing a natural texture decorative rock plate according to claim 1, wherein the working process of the slurry distribution system is as follows: when the conveying belt bears the rock plate blank body and moves to the lower end of the pulp distribution device, the computer control system drives the pulp distribution device to distribute pulp on the surface of the rock plate blank according to an input preset pulp distribution pattern, the pulp is filtered by the filtering device before entering the spray head, granular aggregates in the pulp are removed to prevent the spray head from being blocked, the pulp flows through the digital flowmeter and then enters the spray head cavity, when the pulp liquid level in the spray head cavity exceeds the inlet of the buffer cavity, namely, the pulp flows into the buffer cavity, and then a pulp distribution signal input end receives a digital signal given by the computer control system and drives the extrusion device to work; when the infrared signal generator at the lower end of the extrusion device and the infrared signal receiver at the upper end of the telescopic baffle monitor that the spray head is blocked, the spray head stops working and enters a cleaning state, at the moment, the telescopic baffle is completely stretched out, the flushing device is closed, and water is discharged and flushed by a water outlet at the upper end of the flushing device until the flushing device is completely stretched out when the infrared signal generator at the lower end of the extrusion device and the infrared signal receiver at the upper end of the telescopic baffle monitor a dredging state, and the telescopic baffle is closed again and enters a working state again.

20. A method of manufacturing a natural-grain decorated rock sheet according to claim 1, wherein a step of applying protective glaze is added between said steps E and F.

21. A method for producing a natural-grain decorated rock laminate according to claim 1, wherein the pattern decoration in step G is performed by means of conventional ink-jet printing, and the pattern texture is printed on the surface of the natural-grain decorated rock laminate blank after the re-drying in step F by means of an ink-jet printer.

22. A method for producing a natural-grain decorated rock laminate according to claim 1, wherein the pattern decoration in step G is performed by means of a penetrating ink-jet printing, and the pattern texture is printed on the surface of the natural-grain decorated rock laminate blank after the re-drying in step F by means of an ink-jet printer.

23. The method for manufacturing a natural-texture decorative rock plate according to claim 21 or 22, wherein a step of texture identification is added between the step F and the step G, the texture identification is to identify the digital paste texture of the natural-texture decorative rock plate blank surface after the re-drying in the step F by using an ultra-high definition digital camera, and send a network signal to an inkjet printer, the inkjet printer re-invokes the pattern texture corresponding to the digital paste texture, and the positioning inkjet printing pattern decoration is performed on the natural-texture decorative rock plate blank surface after the re-drying in the step F.

24. A method for producing a natural-grain decorated rock laminate according to claim 1, wherein the pattern decoration in step G is performed by screen printing, and the screen printer prints the pattern texture on the surface of the natural-grain decorated rock laminate blank after the re-drying in step F.

25. A method for producing a natural-grain decorated rock laminate according to claim 1, wherein the pattern decoration in step G is performed by means of a rubber roll printing, and the rubber roll printer prints the pattern texture on the surface of the natural-grain decorated rock laminate blank after the re-drying in step F.

26. A method of making a natural-grain decorated rock sheet according to claim 1, wherein after step I, a polishing process is used.

27. A natural-grain decorated rock sheet produced by the method of producing a natural-grain decorated rock sheet according to any one of claims 1-26.