Pigment and filler slurry mixing device and method

Abstract

The present invention relates to the technical field of pigment slurry, and in particular to a pigment slurry mixing device and method, including a stirring mixer, an extrusion mixer and an impact mixer, wherein the stirring mixer includes a cylinder, a stirring frame is installed in the cylinder, and the stirring frame is driven by a motor I; the extrusion mixer is connected to the stirring mixer 1 through a conveying pipeline and a pressure pump, the extrusion mixer includes a gear ring cylinder and a gear shaft, and the gear shaft is driven by a motor II; the impact mixer is connected to the extrusion mixer through a conveying pipeline, the impact mixer includes a shell and a jet tube, two jet tubes are installed on both sides of the shell and a collision area is formed between the two jet tubes, and the two jet tubes are connected to a hydraulic pump. The device is used for premixing, extrusion mixing and impact mixing to obtain a slurry with a small and uniform particle size, good dispersion effect and high dispersion rate, thereby improving the coloring power, hiding power, gloss intensity and other properties of the coating.

Description

Technical Field

[0001] The invention relates to the technical field of pigment and filler slurry, and in particular to a pigment and filler slurry mixing device and method. Background Art

[0002] In recent years, with the increasingly stringent environmental regulations in various countries around the world, traditional solvent-based coatings have been increasingly challenged, and coatings have shown a clear trend towards solvent-free, water-based, and high-solid coatings. It is a general trend to develop environmentally friendly coatings to replace the previous solvent-based coatings. Pigments and fillers are also a type of coating. The use of pigment and filler slurry is beneficial to environmental protection, reduces the coating construction viscosity and VOC emissions, and has a lower overall cost.

[0003] Pigments and fillers are components of the coating film. Their function is to give the coating film the required colors and provide a certain hiding power, and have a certain influence on the performance of the coating film. Fillers, also known as body pigments, mainly play a "filling" role in the coating film to increase the thickness of the coating film and improve the durability and hardness of the coating film. The presence of water in pigments and fillers has a great influence on their dispersion stability. Under normal circumstances, pigments and fillers with polar chemical bond structures are easy to absorb water in the air. It is often found that when the air is humid, the pigments and fillers that were originally easy to disperse are difficult to meet the requirements in the coating. Even if the fineness meets the requirements after grinding, they often become coarse after being left for a while, and even when solvents and resins are added in the paint mixing stage, coarseness has already occurred. The fundamental reason for this phenomenon is that there is too much water adsorbed on the surface of the pigments and fillers, which not only hinders the diffusion and adsorption process to the surface of the pigments and fillers, but also greatly weakens the interaction between the resin and the pigments and fillers. The use of pigment and filler slurry can maintain the dispersion stability of the powder to a large extent. In order to give full play to the tinting power, hiding power, gloss intensity and other properties of the pigments and fillers in the coating, a slurry with uniform mixing and good particle size uniformity is required.

[0004] To ensure the hiding power of the paint, the smaller the particle size of the pigment is within the range of the half-wave length of visible light, the better. The particle size in the slurry not only determines the characteristics of the pigment, but also determines the quality of the coating. The physical properties of the pigment, such as dispersibility, affect the color within a certain limit, because the degree of dispersion affects the reflection conditions of the pigment. Generally, the smaller the particle size, the darker the color and the greater the brightness, while the more uniform the particle size, the smaller the color difference of the paint.

[0005] However, the existing mixed pigment and filler slurry mixing device and method prepares materials with large and uneven particle sizes, and has problems such as low friction coefficient and poor dispersion effect, resulting in the coating's tinting power, hiding power, gloss intensity and other properties failing to meet requirements. Summary of the invention

[0006] The present invention solves the problem that the material prepared in the related art has a large and uneven particle size, a low friction coefficient and a poor dispersion effect, which causes the coating's tinting power, hiding power, gloss intensity and other properties to fail to meet the requirements. A pigment-filler slurry mixing device is proposed, and the obtained pigment-filler slurry has a small and uniform particle size, and has a good dispersion effect and a high dispersion rate, thereby improving the coating's tinting power, hiding power, gloss intensity and other properties.

[0007] Another aspect of the present invention provides a method for mixing pigment and filler slurry using the pigment and filler slurry mixing device.

[0008] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: a pigment-filler slurry mixing device, comprising:

[0009] A stirring mixer, the stirring mixer comprises a barrel, a stirring frame is installed in the barrel, and the stirring frame is driven by a motor I;

[0010] An extrusion mixer, which is connected to the stirring mixer 1 through a delivery pipeline and a pressure pump, and comprises a meshing gear ring cylinder and a gear shaft, and the gear shaft is driven by a motor II;

[0011] An impact mixer is connected to an extrusion mixer through a delivery pipeline. The impact mixer comprises a shell and a jet tube. Two jet tubes are installed on both sides of the shell and an impact area is formed between the two jet tubes. The two jet tubes are connected to a hydraulic pump.

[0012] As a preferred embodiment, the top of the cylinder is provided with a feed port I, a detection port I, an auxiliary material inlet and a reflux port, respectively. The reflux port is connected to the pressure pump through a reflux pipe, and the bottom of the cylinder is provided with a discharge port I.

[0013] As a preferred solution, the stirring rack includes a stirring frame and a stirring shaft, the stirring shaft passes through the center of the stirring frame and is connected to the stirring frame, the stirring shaft is connected to the motor I, and a plurality of movable stirring rods are installed on the stirring shaft.

[0014] As a preferred solution, the stirring frame includes two circular frames, four vertical rods are installed between the two circular frames, and four horizontal rods are connected between the two circular frames and the stirring shaft.

[0015] As a preferred embodiment, there are three groups of movable stirring rods installed on the stirring shaft from top to bottom, each group has two movable stirring rods and are relatively installed on both sides of the stirring shaft at the same height, and the angle between each group of movable stirring rods is 60°.

[0016] As a preferred embodiment, a connecting hole is provided at one end of the movable stirring rod, a mounting hole is connected to the stirring shaft, the movable stirring rod is connected to the mounting hole on the stirring shaft through the connecting hole, and the movable stirring rod can move along the mounting hole.

[0017] As a preferred solution, one end of the gear ring cylinder is provided with a detection port II and a discharge port II, and the other end is provided with a feed port II.

[0018] As a preferred embodiment, the gear ring cylinder includes a first gear ring cylinder and a second gear ring cylinder, the first gear ring cylinder and the second gear ring cylinder are connected by bolts and nuts, and the gap between the first gear ring cylinder and the second gear ring cylinder is bonded by a sealing gasket, the gear ring cylinder has two positioning pin holes along the diagonal line, and the gap between the gear ring cylinder and the gear shaft gradually decreases from one side of the feed port II to one side of the discharge port II.

[0019] As a preferred solution, a feed port III and a detection port III are respectively provided at the top of the shell, and a discharge port III is provided at the bottom of the shell.

[0020] In addition, a method for mixing pigment and filler slurry is provided, comprising the following steps:

[0021] S1: Stirring and mixing: according to the pigment-filler slurry ratio determined by the formula, add from the feed port I of the stirring mixer, determine the stirring parameters, and conduct testing after stirring and mixing to determine the slurry quality. If it meets the quality requirements, it can be inspected and put into storage. If it does not meet the requirements, it will enter the extrusion mixer;

[0022] S2: Extrusion mixing: The slurry after stirring and mixing enters the extrusion mixer under the action of the pressure pump. The motor II drives the gear shaft to rotate. The slurry is extruded and mixed by the gear ring cylinder and the gear shaft. After extrusion and mixing, it is tested to determine the quality of the slurry. If it meets the quality requirements, it can be inspected and stored. If it does not meet the requirements, it will enter the impact mixer to further improve the slurry quality.

[0023] S3: Impact mixing: The extruded and mixed slurry enters the impact mixer, and the hydraulic pump pressure is adjusted to form two jets that collide with each other in the impact mixer. The collision of the jets can reduce the larger particle size and make the slurry particle size uniform, thereby improving the slurry quality.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention drives the stirring frame to rotate forward or reversely through the motor I, and rotates and stirs in the stirring mixer according to different speeds, so that turbulence can be generated between the dispersed and mutually immiscible pigment filler slurry and additives, so that the slurry is mixed evenly, the mixing efficiency is improved, and the dispersion and emulsification effect of the coating can be enhanced, so that the dispersion efficiency of the pigment filler slurry is high, and a coating with high gloss and high rheology is obtained, which can reduce the sedimentation rate and agglomeration rate of the coating during storage; in addition, the pigment filler slurry is squeezed by the gear shaft and the gear ring cylinder of the extrusion mixer, so that the particle size of the slurry becomes smaller, and in the extrusion process, the pigment filler slurry is mixed more evenly; then, through the action of the two jet tubes and the hydraulic pump in the impact mixer, the impact effect can be further enhanced, and the larger particle size can be reduced by the collision of the jets, and the particle size of the slurry is made uniform, thereby improving the coloring power, hiding power, gloss intensity and other properties of the coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic structural diagram of a stirring mixer of the present invention;

[0027] Figure 3 yes Figure 2 The enlarged schematic diagram of point A in the middle;

[0028] Figure 4 It is a schematic structural diagram of the stirring frame of the present invention;

[0029] Figure 5 It is a schematic diagram of the overall structure of the extrusion mixer of the present invention;

[0030] Figure 6 is a cross-sectional view of an extrusion mixer of the present invention;

[0031] Figure 7 It is a schematic diagram of the overall structure of the impact mixer of the present invention;

[0032] Figure 8 It is a process flow chart of the mixing method of the present invention.

[0033] In the figure:

[0034] 1. Stirring mixer, 101. Cylinder, 102. Stirring frame, 1021. Stirring frame, 1022. Stirring shaft, 1023. Movable stirring rod, 103. Motor Ⅰ, 104. Feed port Ⅰ, 105. Detection port Ⅰ, 106. Discharge port Ⅰ, 107. Auxiliary material inlet, 108. Reflux port, 2. Extrusion mixer, 201. Gear ring cylinder, 202. Gear shaft, 203. Motor Ⅱ, 204. Detection port Ⅱ, 205. Discharge port Ⅱ, 206. Feed port Ⅱ, 207. Positioning pin hole, 3. Impact mixer, 301. Shell, 302. Jet tube, 303. Hydraulic pump, 304. Feed port Ⅲ, 305. Detection port Ⅲ, 306. Discharge port Ⅲ, 4. Pressure pump, 5. Conveying pipeline, 6. Reflux pipe. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0038] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0039] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 80 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0040] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0041] Example 1

[0042] like Figures 1 to 7As shown, a pigment filler slurry mixing device includes a stirring mixer 1, an extrusion mixer 2 and an impact mixer 3. The stirring mixer 1 includes a barrel 101, and a stirring frame 102 is installed in the barrel 101. The stirring frame 102 is driven by a motor I 103, and the motor I 103 drives the stirring frame 102 to rotate forward or reverse. According to different speeds, the stirring frame 102 rotates and stirs in the stirring mixer 1, which can generate turbulence between the additive and the original paint pigment filler, so as to facilitate the mixing of the paint pigment filler and the additive; the extrusion mixer 2 is connected to the stirring mixer 1 through a conveying pipeline 5 and a pressure pump 4. The extrusion mixer 2 includes a meshing gear ring barrel 201 and a gear shaft 202. The gear shaft 202 is driven by a motor II 203, and the motor II 203 drives the gear shaft 202 to rotate forward or reverse. The slurry passes through the gear shaft 202 and the gear shaft 203. The extrusion of the cylinder body 201 reduces the particle size of the slurry; the impact mixer 3 is connected to the extrusion mixer 2 through the conveying pipe 5. The impact mixer 3 includes a shell 301 and a jet tube 302. The two jet tubes 302 are installed on both sides of the inside of the shell 301 and a collision area is formed between the two jet tubes 302. The two jet tubes 302 are connected to the hydraulic pump 303. By adjusting the pressure of the hydraulic pump 303, two jets are formed in the impact mixer 3 to collide with each other. The two jet tubes 302 adopt an adjustable Venturi tube structure, which can make the distance gap between the jet tubes 302 adjustable. The slurry with a certain pressure will have an acceleration effect due to the jet tube 302 when it is exported, which can further enhance the collision effect. The larger particle size can be reduced by the collision of the jets, and the slurry particle size can be made uniform, thereby achieving the purpose of improving the slurry quality.

[0043] In one embodiment, a feed port Ⅰ104, a detection port Ⅰ105, an auxiliary material inlet 107 and a reflux port 108 are respectively provided at the top of the cylinder 101, and a discharge port Ⅰ106 is provided at the bottom of the cylinder 101. The feed port Ⅰ104 is used for feeding, the detection port Ⅰ105 is used for sampling for testing, the auxiliary material inlet 107 is used for feeding auxiliary materials, and the reflux port 108 is connected to the pressure pump 4 through the reflux pipe 6. When the pressure reaches the requirement, the excess color and filler slurry is refluxed, and the discharge port Ⅰ106 is used for discharging.

[0044] In one embodiment, the stirring rack 102 includes a stirring frame 1021 and a stirring shaft 1022. The stirring shaft 1022 passes through the center of the stirring frame 1021 and is connected to the stirring frame 1021. The stirring shaft 1022 is connected to the motor I 103. A plurality of movable stirring rods 1023 are installed on the stirring shaft 1022. The motor I 103 drives the stirring shaft 1022 to rotate, thereby driving the stirring frame 1021 and the movable stirring rods 1023 to rotate.

[0045] Specifically, the stirring frame 1021 includes two circular frames, four vertical bars arranged at equal intervals are installed between the two circular frames, and four cross bars are connected between the two circular frames and the stirring shaft 1022, wherein the cross bars and the vertical bars are located at corresponding positions of the two circular frames. During the stirring process, the vertical bars and the cross bars at the bottom can prevent the material from sticking to the inner wall and bottom of the cylinder 101.

[0046] In one embodiment, there are three groups of movable stirring rods 1023 and they are installed on the stirring shaft 1022 at equal intervals from top to bottom. Each group has two movable stirring rods 1023 and they are relatively installed on both sides of the same height of the stirring shaft 1022. The angle between each group of movable stirring rods 1023 is 60°. Such a staggered design of movable stirring rods 1023 can make the mixing more uniform during the stirring process.

[0047] Specifically, a connecting hole is provided at one end of the movable stirring rod 1023, and a mounting hole is connected to the stirring shaft 1022. The movable stirring rod 1023 is connected to the mounting hole on the stirring shaft 1022 through the connecting hole, and the movable stirring rod 1023 can move along the mounting hole. The motor II 203 drives the stirring frame 102 to rotate forward or reverse through the stirring shaft 1022. When the speed is low, the movable stirring rod 1023 droops under the action of gravity. As the speed increases, the movable stirring rod 1023 tends to a horizontal position under the action of centrifugal force. The movable stirring rod 1023 and the stirring frame 1021 are used to generate turbulence between the color and filler slurry, so that the slurry is mixed more evenly, thereby improving the mixing efficiency.

[0048] In one embodiment, a detection port II 204 and a discharge port II 205 are provided at one end of the gear ring cylinder 201, wherein the detection port II 204 is used for sampling for testing, and the detection port II 204 and the discharge port II 205 are located at the same end of the gear ring cylinder 201, so that it is convenient to sample from one end of the discharge, and the test result is more accurate, and can better reflect the parameters of the color and filler slurry after extrusion and mixing; a feed port II 206 is provided at the other end, wherein the feed port II 206 and the motor II are located on the same side of the gear ring cylinder 201.

[0049] In one embodiment, the gear ring cylinder 201 includes a first gear ring cylinder and a second gear ring cylinder, which are connected by bolts and nuts, which is convenient for disassembly and internal inspection in case of failure. The gap between the first gear ring cylinder and the second gear ring cylinder is bonded with a sealing gasket to ensure that the sealing meets the requirements and prevent the leakage of the color filler slurry; the gear ring cylinder 201 has two positioning pin holes 207 along the diagonal line for positioning the first gear ring cylinder and the second gear ring cylinder when assembling. ; The gap between the gear ring cylinder 201 and the gear shaft 202 gradually decreases from the side of the feed port Ⅱ206 to the side of the discharge port Ⅱ205. After the slurry enters from the feed port Ⅱ206, it is extruded and mixed through the gap between the gear ring cylinder 201 and the gear shaft 202, so that the slurry is continuously mixed from rough extrusion to fine extrusion, and the particle size of the color and filler slurry is further reduced. The slurry can be inspected through the inspection port Ⅱ204, and if qualified, it is collected through the discharge port Ⅱ205. If unqualified, it enters the impact mixer 3.

[0050] In one embodiment, a feed port III 304 and a detection port III 305 are respectively provided on the top of the shell 301 , wherein the detection port III 305 is used for sampling and detection, and a discharge port III 306 is provided on the bottom of the shell 301 .

[0051] Example 2

[0052] like Figures 1 to 8 Another aspect of the present invention further provides a method for mixing pigment and filler slurry, which specifically comprises the following steps:

[0053] Stirring and mixing: according to the pigment-filler slurry ratio determined by the formula, add from the feed port Ⅰ104 of the stirring mixer 1, determine the stirring parameters, and after stirring and mixing, take samples from the detection port Ⅰ105 for detection to determine the quality of the pigment-filler slurry;

[0054] Extrusion mixing: The color and filler slurry after stirring and mixing enters the extrusion mixer 2 from the feed port II 206 under the action of the pressure pump 4, and the motor II 203 drives the gear shaft 202 to rotate. The color and filler slurry is extruded and mixed by the gear ring cylinder 201 and the gear shaft 202. After extrusion and mixing, samples are taken from the detection port II 204 for detection to determine the quality of the color and filler slurry. If the quality requirements are met, it can be inspected and stored. If it does not meet the requirements, it enters the impact mixer 3 to further improve the quality of the color and filler slurry;

[0055] Impact mixing: The pigment and filler slurry after extrusion and mixing enters the impact mixer 3 from the feed port III 304. By adjusting the pressure of the hydraulic pump 303, the hydraulic pump 303 passes the pigment and filler slurry in the impact mixer 3 through the jet tube 302 to form a jet. The two jets collide with each other in the impact area of ​​the impact mixer. Since the jet tube 302 adopts a Venturi tube structure, the jet can be further accelerated at the outlet. The micro-mixing of the pigment and filler slurry is promoted through the jet impact, and the particle size becomes smaller and tends to be consistent, which further improves and enhances the coloring power, hiding power, gloss intensity and other properties of the coating.

[0056] The above are preferred implementation modes of the present invention. Those skilled in the art to which the present invention belongs can also change and modify the above implementation modes. Therefore, the present invention is not limited to the above specific implementation modes. Any obvious improvements, substitutions or modifications made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention.

Claims

1. A pigment-filler slurry mixing device, characterized in that: include: A stirring mixer (1), the stirring mixer (1) comprising a barrel (101), a stirring frame (102) installed in the barrel (101), the stirring frame (102) being driven by a motor I (103); a feed port I (104), a detection port I (105), an auxiliary material inlet (107) and a reflux port (108) are respectively arranged on the top of the barrel (101), the reflux port (108) being connected to a pressure pump (404) via a reflux pipe (6) ), the bottom of the barrel (101) is provided with a discharge port I (106); the stirring frame (102) comprises a stirring frame (1021) and a stirring shaft (1022), the stirring shaft (1022) passes through the center of the stirring frame (1021) and is connected to the stirring frame (1021), the stirring shaft (1022) is connected to the motor I (103), and a plurality of movable stirring rods (1023) are installed on the stirring shaft (1022); An extrusion mixer (2), the extrusion mixer (2) being connected to the stirring mixer (1) via a delivery pipeline (5) and a pressure pump (4), the extrusion mixer (2) comprising a meshing gear ring cylinder (201) and a gear shaft (202), the gear shaft (202) being driven by a motor II (203); An impact mixer (3), the impact mixer (3) is connected to an extrusion mixer (2) via a delivery pipe (5), the impact mixer (3) comprises a shell (301) and a jet tube (302), two jet tubes (302) are installed on both sides of the shell (301) and an impact area is formed between the two jet tubes (302), and the two jet tubes (302) are connected to a hydraulic pump (303).

2. The pigment-filler slurry mixing device according to claim 1, characterized in that: The stirring frame (1021) comprises two circular frames, four vertical rods are installed between the two circular frames, and four horizontal rods are connected between the two circular frames and the stirring shaft (1022).

3. The pigment-filler slurry mixing device according to claim 1, characterized in that: The movable stirring rods (1023) are provided in three groups and are installed on the stirring shaft (1022) from top to bottom. Each group has two movable stirring rods (1023) and are relatively installed on two sides of the stirring shaft (1022) at the same height. The angle between each group of movable stirring rods (1023) is 60°.

4. The pigment-filler slurry mixing device according to claim 1, characterized in that: A connecting hole is provided at one end of the movable stirring rod (1023), and a mounting hole is connected to the stirring shaft (1022). The movable stirring rod (1023) is connected to the mounting hole on the stirring shaft (1022) via the connecting hole, and the movable stirring rod (1023) can move along the mounting hole.

5. The pigment-filler slurry mixing device according to claim 1, characterized in that: One end of the gear ring cylinder (201) is provided with a detection port II (204) and a discharge port II (205), and the other end is provided with a feed port II (206).

6. The pigment-filler slurry mixing device according to claim 5, characterized in that: The gear ring cylinder (201) comprises a first gear ring cylinder and a second gear ring cylinder, the first gear ring cylinder and the second gear ring cylinder are connected by bolts and nuts, and the gap between the first gear ring cylinder and the second gear ring cylinder is bonded by a sealing gasket, the gear ring cylinder (201) is provided with two positioning pin holes (207) along the diagonal line, and the gap between the gear ring cylinder (201) and the gear shaft (202) gradually decreases from one side of the feed port II (206) to one side of the discharge port II (205).

7. The pigment-filler slurry mixing device according to claim 1, characterized in that: The top of the shell (301) is provided with a feed port III (304) and a detection port III (305), respectively, and the bottom of the shell (301) is provided with a discharge port III (306).

8. A pigment-filler slurry mixing method, characterized in that: The following steps are involved: S1: stirring and mixing: according to the ratio of pigment and filler slurry determined by the formula, add the pigment and filler slurry from the feed port I (104) of the stirring mixer (1), determine the stirring parameters, and after stirring and mixing, test to determine the slurry quality. If the quality requirements are met, it can be inspected and stored. If the requirements are not met, it will enter the extrusion mixer (2); S2: extrusion mixing: the slurry after stirring and mixing enters the extrusion mixer (2) under the action of the pressure pump (4), the motor II (203) drives the gear shaft (202) to rotate, and the slurry is extruded and mixed by the gear ring cylinder (201) and the gear shaft (202). After extrusion mixing, the slurry is tested to determine the quality of the slurry. If the quality requirements are met, it can be inspected and stored. If the requirements are not met, it enters the impact mixer (3) to further improve the slurry quality. S3: Impact mixing: The slurry after extrusion mixing enters the impact mixer (3), and the pressure of the hydraulic pump (303) is adjusted to form two jets in the impact mixer (3) to collide with each other. The collision of the jets can reduce the larger particle size and make the slurry particle size uniform, thereby achieving the effect of improving the slurry quality.

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