Horizontal circulating sand mill for processing and manufacturing pigment ink

Abstract

The invention discloses a horizontal circulating sand mill for pigment ink processing and manufacturing, and particularly relates to the technical field of grinding instruments, the horizontal circulating sand mill comprises a grinding tank body mounted on a machine body through a fixing support, and the grinding tank body is sleeved with a cooling jacket with a plurality of independent cooling areas; and a step-by-step segmented grinding unit for grinding the pigment ink is arranged in the grinding tank body. According to the invention, the step-by-step segmented grinding unit and the cooling jacket of the plurality of independent cooling areas are arranged, the step-by-step segmented grinding unit is divided into different grinding disc bodies and grinding magnetic beads with two particle sizes, the grinding disc bodies and the grinding magnetic beads respectively cover each grinding cavity section, and the cooling areas are insulated from one another and operate independently; pigment ink particles are repeatedly stressed and crushed among the grinding media and gradually refined and dispersed, so that the particle size distribution of the pigment particles in the whole grinding process is narrower, the uniformity is better, the chromatic aberration of the ground pigment ink is effectively reduced, and the jet printing stability and color consistency of the finished product ink are improved.

Description

Technical Field

[0001] The invention relates to the technical field of pigment grinding equipment, in particular to a horizontal circulating sand mill for processing and manufacturing pigment ink. Background Art

[0002] In the fine chemical fields such as pigment ink, coating, dye, pigment dispersion, etc., the dispersion and refinement of particles are key factors affecting product performance. As an important wet grinding equipment, sand mill is widely used in nanometer or micrometer particle size control of liquid materials, especially for the preparation of products with high requirements on color uniformity, particle size stability and dispersion performance, such as pigment ink.

[0003] After searching, the utility model patent with publication number CN204816706U discloses a laboratory circulating horizontal nano sand mill, which increases the relative movement speed and collision force between the material and the grinding beads, so that the material obtains a lower nano-level fineness; the laboratory circulating horizontal nano sand mill of the utility model has the advantages of wear resistance, high grinding efficiency, long service life, and is extremely convenient for replacing materials, changing colors, and disassembly and cleaning.

[0004] In the existing solutions, in order to simplify the structure and manufacturing cost, the horizontal sand mill equipment adopts the same structural type of stirring disc throughout the entire grinding chamber. The single stirring disc structure cannot dynamically adjust the shear strength and liquid flow direction according to the degree of particle refinement, which can easily lead to insufficient grinding efficiency and serious residual tail particles. The energy distribution provided by the single type of stirring disc along the length direction of the cavity is uneven, resulting in uneven temperature rise inside the cavity, heat accumulation, and delayed cooling control, causing color drift or poor thermal decomposition dispersion of the colorant during the grinding process. Summary of the invention

[0005] The purpose of the present invention is to provide a horizontal circulating sand mill for processing and manufacturing color ink to solve the problems mentioned in the above background technology.

[0006] The technical problems mainly solved by the present invention are:

[0007] The existing solution uses a single type of stirring disc structure that cannot dynamically adjust the shear strength and liquid flow orientation according to the degree of particle refinement, which easily leads to insufficient grinding efficiency and serious tail particle residue;

[0008] The energy provided in the grinding tank along the length of the cavity is unevenly distributed, resulting in uneven temperature rise inside the cavity, heat accumulation, and delayed cooling control, causing color drift of the color material during the grinding process.

[0009] The present invention can be achieved through the following technical solutions:

[0010] A horizontal circulating sand mill for processing and manufacturing pigment inks, comprising a grinding tank body installed on the machine body through a fixed bracket. An outer sleeve of the grinding tank body is provided with a cooling jacket having a plurality of independent cooling regions. And a step-by-step segmented grinding unit for grinding the pigment inks is arranged inside the grinding tank body. An end of the grinding tank body is connected with a connecting shell, and a magnetic grid unit for adsorbing incompletely separated grinding media is arranged in a channel inside the connecting shell;

[0011] The step-by-step segmented grinding unit includes a plurality of grinding discs driven by a main shaft. The shapes of the plurality of grinding discs are different, and a space formed between two adjacent grinding discs is a grinding chamber. Grinding magnetic beads that make irregular high-speed turbulent flow movements are evenly arranged in each grinding chamber;

[0012] On an inner wall surface of the grinding tank body outside each corresponding grinding disc, a bead retaining ring that matches is provided. A notch is provided in the middle of a bottom surface of the bead retaining ring, and a sealing baffle for dynamically sealing the notch is rotatably installed inside the bead retaining ring;

[0013] An inner cavity of the grinding tank body is provided with a bead discharging pipe along an end of discharging. An end of the bead discharging pipe is rotatably installed with a corrugated pipe that moves up and down in a vertical direction. A bead discharging channel is communicated with an end of the corrugated pipe;

[0014] On an upper surface of the machine body, cleaning chambers are symmetrically provided below a central axis of the bead discharging pipe. An interface is provided at an upper end of each cleaning chamber, and the rotating bead discharging channel is used in cooperation with the two interfaces;

[0015] A switching and adjusting unit for changing a direction of the bead discharging channel is provided on the upper surface of the machine body between the two interfaces.

[0016] A further technical improvement of the present invention lies in that: the switching and adjusting unit includes a rotary cylinder. A driving end of the rotary cylinder is provided with a mounting block. A linear cylinder is installed at a top end of the mounting block. A pushing end of the linear cylinder is provided with a connecting plate, and an electric gripper for limiting and clamping the bead discharging channel is installed on an end surface of the connecting plate.

[0017] A further technical improvement of the present invention lies in that: in the cooling jacket, a feeding cooling area, a shearing cooling area and a discharging cooling area that are connected with a coolant inlet through a three-way valve are sequentially provided. The feeding cooling area, the shearing cooling area and the discharging cooling area are arranged outside corresponding grinding chambers, and independent temperature sensors are installed on all of them. A serpentine cooling ring that is attached to an inner wall of the grinding tank body is arranged in the shearing cooling area;

[0018] A plurality of inlets are provided at an inlet of the serpentine cooling ring.

[0019] A further technical improvement of the present invention lies in that: the diameter of the front-stage grinding magnetic beads is larger than that of the rear-stage grinding magnetic beads;

[0020] The grinding disc body is successively a diversion hole disc, an inclined tooth disc and a corrugated disc.

[0021] A further technical improvement of the present invention lies in that: the magnetic grid unit includes a plurality of first magnetic rods vertically installed, a second magnetic rod longitudinally arranged is provided on one side of the first magnetic rod, and the second magnetic rod is perpendicular to the first magnetic rod.

[0022] A further technical improvement of the present invention lies in that: a stroke cylinder is provided on the upper surface of the connecting shell, a second scraping block is sleeved outside each first magnetic rod, adjacent second scraping blocks are fixed by a first connecting block, convex blocks are installed on the surfaces of two of the second scraping blocks, and the pushing end of the stroke cylinder is fixed to the convex blocks;

[0023] A first scraping block is sleeved outside each second magnetic rod, adjacent first scraping blocks are fixed by a second connecting block, a linear guide rail is embedded in the top surface of the inner channel of the connecting shell, and the moving end of the linear guide rail is fixed to the first scraping block through a transmission plate.

[0024] A further technical improvement of the present invention lies in that: a spiral separation disc for radially offsetting the incompletely separated grinding medium towards the inner wall of the grinding tank is installed at the end of the main shaft, the edge of the spiral separation disc extends into the connecting shell, and the discharge end of the connecting shell is connected to a storage tank through a pipeline.

[0025] A further technical improvement of the present invention lies in that: a vacancy part is provided on the bottom surface of the inner cavity of the sealing baffle and is concentric with the grinding tank body, and a gear ring is installed outside the sealing baffle, and a driving gear driven by a motor and meshing with the gear ring is installed on the inner wall surface of the cooling jacket.

[0026] A further technical improvement of the present invention lies in that: a bead guide port communicating with each grinding cavity is provided at the top of the grinding tank body, and a sealing plug is fitted and installed in the bead guide port.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. By setting a step-by-step segmented grinding unit and a cooling jacket with multiple independent cooling areas, the step-by-step segmented grinding unit is divided into different grinding disc bodies and two kinds of grinding magnetic beads with different particle sizes, which respectively cover each grinding cavity segment. The cooling areas are thermally insulated from each other and operate independently. The colorant ink particles are repeatedly stressed and broken between the grinding media (multiple grinding magnetic beads), and are gradually refined and dispersed (multi-stage grinding), so that the particle size distribution of the colorant particles is narrower and the uniformity is better during the whole grinding process, effectively reducing the color difference of the ground colorant ink, and improving the printing stability and color consistency of the finished ink;

[0029] 2. By setting two cleaning chambers and a switching and adjusting unit, the small-diameter grinding magnetic beads are discharged first. The bead blocking ring is opened, and the small-diameter grinding magnetic beads enter one of the cleaning chambers along the bead outlet pipe and the bead discharge channel. The linear cylinder pushes the bead discharge channel clamped by the electric gripper upward. At this time, the bellows retracts. Then, through the rotation of the rotary cylinder, the bead discharge channel together with the bellows rotates half a turn. At this time, the bead discharge channel is directly above the other interface. Immediately afterwards, the linear cylinder retracts to connect the bead discharge channel with the other interface, thereby realizing the bead discharge of the two cleaning chambers and zone cleaning to avoid confusion.

[0030] 3. By correspondingly arranging a bead blocking ring in the grinding chamber, the sealing baffle is rotatably installed in the bead blocking ring. By changing the position of the sealing baffle, the notch is in an open or closed state, thereby realizing two actions of blocking or discharging beads, which is convenient for cleaning and color changing and ensures no bead leakage during operation.

[0031] 4. By setting a magnetic grid unit, the second magnetic rod and the first magnetic rod arranged vertically enhance the ability to capture magnetic impurities. The pushing end of the stroke cylinder is fixed to the protruding block, which is used to control the protruding block to drive the second scraping block to move up and down on the surface of the first magnetic rod, thereby realizing the function of automatically scraping off the attached substances. Through the reciprocating drive of the linear guide rail, all the first scraping blocks are driven to move synchronously along the direction of the second magnetic rod to realize the synchronous cleaning of the surface of the second magnetic rod, and automatically scrape and clean the two-direction magnetic rods in the magnetic grid to avoid the long-term attachment of magnetic particles and improve the operating efficiency of the whole machine and the service life of the magnetic grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0033] Figure 1 It is a schematic external structure diagram of the present invention;

[0034] Figure 2 It is a schematic internal structure diagram of the grinding tank body of the present invention;

[0035] Figure 3 It is a schematic installation structure diagram of the sealing baffle and the bead blocking ring of the present invention;

[0036] Figure 4 It is a schematic structure diagram of the serpentine cooling ring of the present invention;

[0037] Figure 5 It is a schematic installation structure diagram of the bead discharge channel and the cleaning chamber of the present invention;

[0038] Figure 6 It is a schematic installation structure diagram of the magnetic grid unit of the present invention.

[0039] In the figure: 1. Machine body; 2. Grinding tank body; 3. Cooling jacket; 4. Bead guide port; 5. Connecting shell; 6. Cleaning chamber; 7. Storage tank; 8. Inlet cooling area; 9. Shearing cooling area; 10. Outlet cooling area; 11. Driving gear; 12. Stroke cylinder; 13. Magnetic grid unit; 15. Spiral separation disc; 16. Grinding magnetic beads; 17. Grinding disc body; 18. Bead retaining ring; 19. Bead outlet pipe; 20. First magnetic rod; 21. Protruding block; 22. First scraping block; 23. Serpentine cooling ring; 24. Sealing baffle; 25. Gear ring; 27. Notch; 28. Vacant part; 29. Interface; 30. Bellows; 31. Linear cylinder; 32. Rotary cylinder; 33. Mounting block; 34. Connecting plate; 35. Electric gripper; 36. Bead discharge channel; 37. Linear guide rail; 38. Second scraping block; 39. Second magnetic rod. Detailed implementation manners

[0040] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in combination with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present invention as follows.

[0041] Please refer to Figures 1-6 As shown in the figure, the present invention provides a horizontal circulating sand mill for processing and manufacturing pigment ink, which includes a machine body 1. A horizontal grinding tank body 2 is installed on the machine body 1 through a fixed bracket. An external cooling jacket 3 with multiple independent cooling regions is sleeved outside the grinding tank body 2. And a step-by-step segmented grinding unit for grinding the pigment ink is arranged inside the grinding tank body 2. A connecting shell 5 is connected to the end of the grinding tank body 2. A magnetic grid unit 13 for adsorbing incompletely separated grinding media is arranged in the channel inside the connecting shell 5;

[0042] The step-by-step segmented grinding unit includes a plurality of grinding disc bodies 17 driven by a main shaft. The shapes of the plurality of grinding disc bodies 17 are different. The space formed between two adjacent grinding disc bodies 17 is a grinding chamber. Uniformly arranged in each grinding chamber are grinding magnetic beads 16 that make irregular high-speed turbulent flow movements;

[0043] On the inner wall surface of the grinding tank body 2 outside each corresponding grinding disc body 17, a bead retaining ring 18 that matches is provided. In the middle of the bottom surface of the bead retaining ring 18, a notch 27 is provided. And a sealing baffle 24 that dynamically seals the notch 27 is rotatably installed inside the bead retaining ring 18;

[0044] An outlet pipe 19 is arranged along the end of the discharge in the inner cavity of the grinding tank body 2. The end of the outlet pipe 19 is rotatably installed with a bellows 30 that moves up and down in the vertical direction. The end of the bellows 30 is communicated with a bead discharge channel 36;

[0045] The upper surface of the body 1 is symmetrically provided with cleaning chambers 6 below the central axis of the bead outlet tube 19. An interface 29 is provided at the upper end of each cleaning chamber 6, and the rotating bead discharge channel 36 is used in cooperation with the two interfaces 29;

[0046] A switching and adjusting unit for changing the direction of the bead discharge channel 36 is provided between the two interfaces 29 on the upper surface of the body 1;

[0047] As Figure 2 shown, one side of the top of the grinding tank body 2 is provided with a feed port. The colorant ink reaches the inside of the grinding tank body 2 through the feed port. Before the initial stage, each grinding chamber is filled with a certain proportion of grinding magnetic beads 16. The grinding magnetic beads 16 are used as grinding media and are respectively distributed in different grinding chambers;

[0048] Each grinding chamber section is provided with an independently arranged grinding disc body 17, constructing a multi-stage particle size control path from coarse grinding to fine grinding, which can effectively narrow the particle size distribution range of the ground colorant, significantly reduce the ink color difference, and improve the inkjet uniformity and product stability;

[0049] The grinding disc body 17 rotates at a high speed under the drive of the main shaft, driving the grinding magnetic beads 16 to make local rotation or offset movement;

[0050] During the multiple collisions between the grinding disc body 17 and the grinding magnetic beads 16, the grinding magnetic beads 16 collide and move at a high speed in the grinding chamber between two adjacent grinding disc bodies 17 along an irregular path;

[0051] The structure of the main shaft and the grinding disc body 17 forms an annular or spiral flow, forming a violent relative movement between the bead materials, bringing strong shear and dispersion forces;

[0052] The colorant ink particles are repeatedly crushed by the force between the grinding media (multiple grinding magnetic beads 16) and are gradually refined and dispersed;

[0053] The grinding magnetic beads 16 do not rotate integrally with the main shaft, but move relatively under the push of the grinding disc body 17, and realize the multi-stage dispersion and refinement of the colorant under the action of the mutual impact between the particles;

[0054] Since a bead blocking ring 18 is installed in each grinding chamber, the grinding magnetic beads 16 are blocked from leaving the corresponding grinding chamber;

[0055] Due to the different shapes of the grinding disc bodies 17, the sizes of the grinding magnetic beads 16 used are also different. The grinding magnetic beads 16 in the front-stage grinding chamber are larger, providing higher kinetic energy for crushing the colorant ink particles; the grinding magnetic beads 16 in the rear-stage grinding chamber are smaller, suitable for stable micro-particle shearing and surface finishing;

[0056] Due to the differences in particle size control, shear strength, and the structure of the grinding disc body 17 in each grinding chamber section, different degrees of heat accumulation will occur during the grinding process;

[0057] In order to precisely control the temperature of the colorant ink in each cavity section and avoid thermal denaturation, volatilization or particle size rebound of the colorant caused by local overheating, in this embodiment, a cooling jacket 3 with a multi-zone structure is provided outside the grinding cavity;

[0058] The cooling jacket 3 is divided into multiple independent cooling regions, each covering a corresponding grinding cavity section, and the cooling regions are thermally insulated from each other and operate independently;

[0059] Each cooling region is provided with an independent coolant inlet and outlet, and is equipped with a corresponding temperature sensor and flow regulation and control unit, which can achieve segmented temperature control, segmented flow regulation and independent cooling, so as to dynamically adjust its cooling capacity according to the grinding heat of different cavity sections, and improve the stability and precision of the grinding process;

[0060] The coolant adopts the circulating fluid in the existing mature solutions such as ethylene glycol mixture, water cooling system or refrigeration circuit to reduce costs;

[0061] Through the differential design of the multi-stage grinding disc body 17 structure and the temperature management system with independent control of each cavity section, the particle size distribution of the colorant particles is narrower and the uniformity is better during the entire grinding process, effectively reducing the color difference of the ground colorant ink and improving the printing stability and color consistency of the finished ink;

[0062] After grinding, the liquid colorant is discharged through the connecting shell 5, and the uncompletely separated grinding medium (broken magnetic bead particles and magnetic particle pollutants) is adsorbed by the magnetic grid unit 13, and filtered without a screen design;

[0063] Refer to Figure 3 and Figure 5 As shown, when grinding different colorant inks, the grinding magnetic beads 16 of two particle sizes enter the corresponding cleaning cavities 6 for sectional cleaning through different interfaces 29 in sequence to avoid confusion. When discharging the beads, the small-particle-size grinding magnetic beads 16 are discharged first. The sealing baffle 24 in the bead retaining ring 18 where the large-particle-size grinding magnetic beads 16 are located is in a closed state, blocking the notch 27, and the large-particle-size grinding magnetic beads 16 cannot pass through smoothly. The sealing baffle 24 in the bead retaining ring 18 where the small-particle-size grinding magnetic beads 16 are located is in an open state, and the notch 27 is exposed at this time, and the small-particle-size grinding magnetic beads 16 are discharged smoothly; when discharging the large-particle-size grinding magnetic beads 16, the bead discharging channel 36 rotates above another interface 29, so as to realize that the grinding magnetic beads 16 of two particle sizes enter different cleaning cavities 6.

[0064] Refer to Figure Figure 5As shown in the figure, the switching and adjusting unit includes a rotary cylinder 32. An installation block 33 is provided at the driving end of the rotary cylinder 32. A linear cylinder 31 is installed at the top of the installation block 33. A connecting plate 34 is provided at the pushing end of the linear cylinder 31. An electric gripper 35 for limiting and clamping the bead discharging channel 36 is installed on the end face of the connecting plate 34.

[0065] Initially, the electric gripper 35 clamps the bead discharging channel 36, the linear cylinder 31 does not work, and the corrugated pipe 30 is in an extended state, that is, the bead discharging channel 36 is connected to one of the interfaces 29, and at this time, the beads are discharged normally. When the linear cylinder 31 works, it pushes the bead discharging channel 36 clamped by the electric gripper 35 upward. At this time, the corrugated pipe 30 retracts. Then, through the rotation of the rotary cylinder 32, the bead discharging channel 36 together with the corrugated pipe 30 is driven to rotate half a circle. At this time, the bead discharging channel 36 is located directly above the other interface 29. Immediately afterwards, the linear cylinder 31 retracts, connecting the bead discharging channel 36 to the other interface 29, so as to realize the bead discharging of the two cleaning chambers 6.

[0066] Refer to Figure 2 and Figure 4 As shown in the figure, an inlet cooling zone 8, a shearing cooling zone 9, and an outlet cooling zone 10 that are connected to the coolant inlet through a three-way valve are sequentially arranged in the cooling jacket 3 to realize the segmented and shunt control of the cooling medium (coolant). The inlet cooling zone 8, the shearing cooling zone 9, and the outlet cooling zone 10 are arranged outside the corresponding grinding chambers, and independent temperature sensors are installed on all of them to monitor the temperature changes of each section of the chamber in real time to realize closed-loop temperature control. A serpentine cooling ring 23 that is in contact with the inner wall of the grinding tank body 2 is arranged in the shearing cooling zone 9 for the rapid heat dissipation of the high-intensity shearing heat source.

[0067] There are multiple inlets for the serpentine cooling ring 23 to disperse the coolant into different ring segments of the cooling channel, realizing the uniform supply of the coolant and the rapid heat exchange, avoiding the phenomenon of heat accumulation caused by insufficient local cooling, and thus further improving the thermal stability and grinding uniformity of the high-shear zone.

[0068] Refer to Figure 2 As shown in the figure, the diameter of the front-section grinding magnetic beads 16 is larger than that of the rear-section grinding magnetic beads 16.

[0069] The front-section grinding magnetic beads 16 are preferably high-strength magnetic beads with a diameter of 0.5 - 1.0 mm, which are used for the preliminary crushing and rough grinding of the original large-particle pigments.

[0070] The rear-section grinding magnetic beads 16 are preferably small-diameter magnetic beads with a diameter of 0.2 - 0.5 mm, which are used for the fine shearing and particle size convergence control of the particle tailings.

[0071] The grinding disk body 17 is successively a diversion hole disk, a helical gear disk, and a corrugated disk; the diversion hole disk enhances the axial flow and assists the rapid passage of the rough grinding material.

[0072] The helical gear disk improves the shearing efficiency and local turbulence intensity;

[0073] The corrugated disk controls the particle size stability at the tail section, realizes fine grinding and particle surface finishing, and forms a three-stage grinding path of rough grinding, shearing, and fine grinding.

[0074] Refer to Figure 2 and Figure 6 As shown, the magnetic grid unit 13 includes a plurality of first magnetic rods 20 vertically installed. One side of the first magnetic rods 20 is provided with second magnetic rods 39 arranged longitudinally. The second magnetic rods 39 are perpendicular to the first magnetic rods 20 to enhance the ability to capture magnetic impurities;

[0075] A stroke cylinder 12 is provided on the upper surface of the connecting shell 5. Each of the first magnetic rods 20 is sleeved with a second scraping block 38. Adjacent two second scraping blocks 38 are fixed by a first connecting block. The surfaces of two of the second scraping blocks 38 are provided with protruding blocks 21. The pushing end of the stroke cylinder 12 is fixed to the protruding block 21, which is used to control the protruding block 21 to drive the second scraping block 38 to move up and down on the surface of the first magnetic rod 20, so as to realize the function of automatically scraping off attachments;

[0076] Each of the second magnetic rods 39 is sleeved with a first scraping block 22. Adjacent two first scraping blocks 22 are fixed by a second connecting block. The top surface of the inner channel of the connecting shell 5 is embedded with a linear guide rail 37. The moving end of the linear guide rail 37 is fixed to the first scraping block 22 through a transmission plate; through the reciprocating drive of the linear guide rail 37, all the first scraping blocks 22 are driven to move synchronously along the direction of the second magnetic rod 39, realizing the synchronous cleaning of the surface of the second magnetic rod 39, automatically scraping and cleaning the magnetic rods in two directions in the magnetic grid, avoiding the long-term attachment of magnetic particles, and improving the operating efficiency of the whole machine and the service life of the magnetic grid.

[0077] Refer to Figure 2 As shown, a spiral separation disk 15 for radially offsetting the incompletely separated grinding medium towards the inner wall of the grinding tank 2 is installed at the end of the main shaft. The edge of the spiral separation disk 15 extends into the connecting shell 5. The discharge end of the connecting shell 5 is connected to a storage tank 7 through a pipeline;

[0078] The spiral separation disk 15 radially deviates the incompletely separated grinding magnetic beads 16 from the mainstream, improving the separation efficiency and preventing the bead material from being discharged with the pigment ink.

[0079] Refer to Figure 3 As shown, a vacancy 28 is provided on the bottom surface of the inner cavity of the sealing baffle 24, which is concentric with the grinding tank 2. A gear ring 25 is installed outside the sealing baffle 24. A driving gear 11 driven by a motor and meshing with the gear ring 25 is installed on the inner wall surface of the cooling jacket 3;

[0080] The driving gear 11 drives the gear ring 25, and the gear ring 25 drives the sealing baffle 24 to rotate until the vacant part 28 on the sealing baffle 24 communicates with the notch 27 on the bead retaining ring 18, facilitating the bead discharging of the grinding beads 16.

[0081] Refer to Figure 1 As shown, a bead guiding port 4 communicating with each grinding chamber is provided at the top of the grinding tank body 2. A sealing plug is fitted and installed in the bead guiding port 4. After opening the sealing plug, the cleaned and dried grinding beads 16 enter the corresponding grinding chamber from the bead guiding port 4.

[0082] When the present invention is in use, by setting a step-by-step segmented grinding unit and a cooling jacket 3 with multiple independent cooling areas, the step-by-step segmented grinding unit is divided into different grinding disk bodies 17 and two types of grinding beads 16 with different particle sizes, covering each grinding chamber section respectively. Each cooling area is thermally insulated from each other and operates independently. The colorant ink particles are repeatedly stressed and broken between the grinding media (multiple grinding beads 16) and are gradually refined and dispersed (multi-stage grinding), so that the particle size distribution of the colorant particles is narrower and the uniformity is better during the whole grinding process, effectively reducing the color difference of the ground colorant ink and improving the printing stability and color consistency of the finished ink;

[0083] By setting two cleaning chambers 6 and a switching and adjusting unit, first discharge the grinding beads 16 with small particle sizes. The bead retaining ring 18 is opened, and the grinding beads 16 with small particle sizes enter one of the cleaning chambers 6 along the bead discharging pipe 19 and the bead discharging channel 36. The linear cylinder 31 pushes the bead discharging channel 36 clamped by the electric gripper 35 upward. At this time, the corrugated pipe 30 retracts. Then, through the rotation of the rotary cylinder 32, the bead discharging channel 36 together with the corrugated pipe 30 rotates half a turn. At this time, the bead discharging channel 36 is directly above the other interface 29. Immediately afterwards, the linear cylinder 31 retracts to connect the bead discharging channel 36 with the other interface 29, thereby realizing the bead discharging of the two cleaning chambers 6 and cleaning in zones to avoid confusion;

[0084] By correspondingly arranging a bead retaining ring 18 in the grinding chamber, the sealing baffle 24 is rotatably installed in the bead retaining ring 18. By changing the position of the sealing baffle 24, the notch 27 is in an open or closed state, thereby realizing two actions of plugging or bead discharging, facilitating cleaning and color changing, and ensuring no bead leakage during work;

[0085] By setting the magnetic grid unit 13, the vertically arranged second magnetic rod 39 and the first magnetic rod 20, the ability to capture magnetic impurities is enhanced. The driving end of the stroke cylinder 12 is fixed to the protruding block 21, which is used to control the protruding block 21 to drive the second scraping block 38 to move up and down on the surface of the first magnetic rod 20, so as to realize the function of automatically scraping off attachments. Through the reciprocating drive of the linear guide rail 37, all the first scraping blocks 22 are driven to move synchronously along the direction of the second magnetic rod 39, realizing the synchronous cleaning of the surface of the second magnetic rod 39, and automatically scraping and cleaning the magnetic rods in two directions in the magnetic grid, avoiding the long-term attachment of magnetic particles, and improving the operation efficiency of the whole machine and the service life of the magnetic grid.

[0086] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed as above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to form equivalent embodiments with equivalent changes, but as long as they do not depart from the technical content of the present invention, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A horizontal circulating sand mill for processing and manufacturing pigment ink, comprising a grinding tank body (2) mounted on a machine body (1) via a fixed bracket, characterized in that: The grinding tank body (2) is provided with a cooling jacket (3) having a plurality of independent cooling areas on the outside, and the grinding tank body (2) is provided with a step-by-step grinding unit for grinding the color ink inside, and the end of the grinding tank body (2) is connected to a connecting shell (5), and a magnetic grid unit (13) for adsorbing the grinding medium that is not completely separated is provided in the channel inside the connecting shell (5); The step-by-step segmented grinding unit comprises a plurality of grinding discs (17) driven by a main shaft, the plurality of grinding discs (17) having different shapes, a space formed by two adjacent grinding discs (17) being a grinding chamber, and grinding magnetic beads (16) performing irregular high-speed turbulent motion being evenly arranged in each grinding chamber; The inner wall surface of the grinding tank body (2) is provided with a matching bead retaining ring (18) outside each corresponding grinding disc body (17), a notch (27) is provided in the middle of the bottom surface of the bead retaining ring (18), and a sealing baffle (24) is rotatably installed in the bead retaining ring (18) to dynamically seal the notch (27); The inner cavity of the grinding tank body (2) is provided with a bead discharge pipe (19) along the discharge end, and a bellows (30) which is lifted and lowered in the vertical direction is rotatably mounted on the end of the bead discharge pipe (19), and a bead discharge channel (36) is connected to the end of the bellows (30); The upper surface of the machine body (1) is symmetrically provided with cleaning chambers (6) below the central axis of the bead outlet tube (19), and the upper end of each cleaning chamber (6) is provided with an interface (29), and the rotating bead discharge channel (36) is used in conjunction with the two interfaces (29); The upper surface of the machine body (1) is provided with a switching adjustment unit between the two interfaces (29) for changing the direction of the bead discharge channel (36).

2. A horizontal circulating sand mill for processing and manufacturing pigment ink according to claim 1, characterized in that: The switching adjustment unit comprises a rotary cylinder (32), a driving end of the rotary cylinder (32) is provided with a mounting block (33), a top end of the mounting block (33) is provided with a linear cylinder (31), a pushing end of the linear cylinder (31) is provided with a connecting plate (34), and an end surface of the connecting plate (34) is provided with an electric clamp (35) for limiting and clamping the ball discharge channel (36).

3. The horizontal circulating sand mill for processing and manufacturing pigment ink according to claim 1, characterized in that: The cooling jacket (3) is provided with a feed cooling zone (8), a shear cooling zone (9) and a discharge cooling zone (10) connected to a cooling liquid inlet via a three-way valve in sequence, the feed cooling zone (8), the shear cooling zone (9) and the discharge cooling zone (10) are arranged outside the corresponding grinding chamber and are all equipped with independent temperature sensors, and the shear cooling zone (9) is provided with a serpentine cooling ring (23) in contact with the inner wall of the grinding tank body (2); The serpentine cooling ring (23) is provided with a plurality of inlets.

4. The horizontal circulating sand mill for processing and manufacturing pigment ink according to claim 1, characterized in that: The diameter of the front-stage grinding magnetic beads (16) is greater than the diameter of the rear-stage grinding magnetic beads (16); The grinding disc body (17) is a guide hole disc, a bevel tooth disc and a corrugated disc in sequence.

5. The horizontal circulating sand mill for processing and manufacturing pigment ink according to claim 1, characterized in that: The magnetic grid unit (13) comprises a plurality of vertically mounted magnetic bars (20), one side of which is provided with a longitudinally arranged magnetic bar (39), and the magnetic bar (39) is arranged perpendicular to the magnetic bar (20).

6. The horizontal circulating sand mill for processing and manufacturing pigment ink according to claim 5, characterized in that: The upper surface of the connecting shell (5) is provided with a stroke cylinder (12), and the exterior of each of the magnetic rods (20) is provided with a scraper block (38), and two adjacent scraper blocks (38) are fixed by a connecting block (1), wherein the surfaces of the two scraper blocks (38) are provided with a protruding block (21), and the pushing end of the stroke cylinder (12) is fixed to the protruding block (21); A scraper block (22) is sleeved on the outside of each of the magnetic bars (39), and two adjacent scraper blocks (22) are fixed by connecting blocks (2). A linear guide rail (37) is embedded in the top surface of the channel in the connecting shell (5), and the moving end of the linear guide rail (37) is fixed to the scraper block (22) by a transmission plate.

7. The horizontal circulating sand mill for processing and manufacturing pigment ink according to claim 1, characterized in that: A spiral separation disc (15) is installed at the end of the main shaft for radially offsetting the incompletely separated grinding media toward the inner wall of the grinding tank body (2). The edge of the spiral separation disc (15) extends into the connecting shell (5). The discharge end of the connecting shell (5) is connected to the storage tank (7) through a pipeline.

8. The horizontal circulating sand mill for processing and manufacturing pigment ink according to claim 1, characterized in that: The bottom surface of the inner cavity of the sealing baffle (24) is provided with a vacant portion (28) and is coaxial with the grinding tank body (2), and a gear ring (25) is installed on the outside of the sealing baffle (24), and a driving gear (11) driven by a motor and meshing with the gear ring (25) is installed on the inner wall surface of the cooling jacket (3).

9. The horizontal circulating sand mill for processing and manufacturing pigment ink according to claim 1, characterized in that: The top of the grinding tank body (2) is provided with a bead guide port (4) communicating with each grinding chamber, and a sealing plug is matched and installed in the bead guide port (4).

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