A colorant paste grinding device for digital printing ink preparation

Abstract

The application relates to the grinding technical field and discloses a color paste grinding device for digital printing ink preparation. The to-be-ground coating in a grinding cavity can gradually pass through the extrusion and friction of a center roller, a rolling roller I, a rolling roller II, a grinding roller I, a grinding roller II and a grinding roller III. The rolling roller I, the rolling roller II, the grinding roller I, the grinding roller II and the grinding roller III are extruded and rubbed for multiple times. Meanwhile, the space in the grinding cavity gradually decreases from the feeding port to the discharging port. On the basis of the space change design, the diameter values of the rolling roller I, the rolling roller II, the grinding roller I, the grinding roller II and the grinding roller III gradually decrease from large to small. In the process of moving towards the discharging port, the ink can gradually gather, and the pressure gradually increases due to the smaller space and the extrusion effect between the rollers, so that the grinding pressure continuously increases, thereby obtaining stronger grinding effect.

Description

Technical Field

[0001] This application relates to the field of grinding technology, and in particular to a grinding apparatus for preparing color pastes for digital printing inks. Background Technology

[0002] In the process of ink production and preparation, it is generally necessary to carry out processes such as premix preparation, pulping, grinding, filtration and color matching. Among them, the grinding process mostly adopts a three-roll mill. Its main working principle is to achieve the grinding effect by the mutual extrusion and friction at different speeds of the surfaces of three horizontal rollers. When the equipment is started, the motor drives the rollers to rotate through the transmission device. The material is usually added between the middle roller and the rear roller. Since the three rollers rotate in different directions (the speed increases sequentially from back to front), the material is subjected to strong extrusion and friction between the rollers, thereby achieving the grinding effect.

[0003] However, existing three-roll mills only have a section where the three rollers squeeze each other when grinding ink. The rollers are cylindrical, and the area of ​​the squeezing section is small. Therefore, the squeezing and friction time for ink is short, the grinding time is short, and the fineness of grinding is limited. Summary of the Invention

[0004] This application proposes a grinding device for color paste in digital printing ink preparation. It features five rollers that engage in extrusion friction with a central roller to increase grinding time and the grindable area. The grinding chamber gradually shrinks, concentrating the ink and increasing grinding pressure. A swing plate is installed on the pressure roller, carrying ink between the swing plate and the pressure roller, extending the ink's time within the grinding chamber. The swing plate contacts surrounding devices to obtain extrusion pressure, squeezing the carried ink. Due to tangential contact with the external environment, the swing plate oscillates circumferentially, thus tangentially rubbing and grinding the carried ink. The movement of the swing plate compresses cooling water, forming a multi-directional flow, increasing turbulence and improving cooling effect. This addresses the problems of short grinding time and small effective grindable area in existing three-roll mills.

[0005] To achieve the above objectives, this application adopts the following technical solution: a grinding device for preparing color paste for digital printing ink, comprising a processing box, wherein a grinding chamber is provided in the processing box to provide grinding space, and an inlet for inputting ink into the grinding chamber and an outlet for discharging ink from the grinding chamber; a grinding roller assembly, comprising a central roller, a pressing roller I, a pressing roller II, a grinding roller I, a grinding roller II, and a grinding roller III movably sleeved in the grinding chamber, for forming a space for grinding and rubbing ink between the rollers; a grinding device, comprising circumferentially evenly distributed sliding grooves on the pressing roller I, wherein a movable seat is sleeved in the sliding grooves, and a swing plate is provided at the end of the movable seat away from the pressing roller I, for contacting external pressure to move the swing plate, thereby squeezing and grinding the ink between the swing plate and the pressing roller I.

[0006] Preferably, the inner wall of the grinding chamber away from the central roller is arc-shaped, with the center point of the arc close to the feed inlet. The space of the grinding chamber continuously narrows from the feed inlet to the discharge outlet, which is used to gather ink and increase pressure.

[0007] Preferably, the rolling roller I, rolling roller II, grinding roller I, grinding roller II and grinding roller III are arranged circumferentially from the feed inlet to the discharge outlet, and the diameter values ​​of the rolling roller I, rolling roller II, grinding roller I, grinding roller II and grinding roller III gradually decrease to adapt to the continuously shrinking space of the grinding chamber.

[0008] Preferably, the center roller rotates in the opposite direction to the rolling roller I, rolling roller II, grinding roller I, grinding roller II and grinding roller III, in order to provide stronger squeezing, shearing and frictional forces to the ink between the rollers.

[0009] Preferably, the cross-section of the swing plate is arc-shaped, the center of the arc of the swing plate coincides with the center of the rolling roller I, and the two ends of the swing plate in the arc direction are provided with rounded corner surfaces, which are used to smoothly contact the swing plate when it rotates with the rolling roller I.

[0010] Preferably, symmetrical converging cavities are formed at both ends of the rolling roller I, and symmetrical transition grooves are formed on the outer sides of both ends of the rolling roller I. A water supply hole is formed between the transition groove and the converging cavity. An annular slip ring is fitted onto the groove opening of the transition groove away from the converging cavity. A liquid supply pipe is provided on the slip ring and communicates with the transition groove to provide input and output of coolant. A circumferentially distributed cooling cavity is formed inside the rolling roller I. A connecting cavity I is formed on one side of the center of the rolling roller I. The two ends of the connecting cavity I are respectively connected to the converging cavities on both sides to form a flow space for cooling water in the rolling roller I.

[0011] Preferably, a connecting cavity II is provided between the bottom of the sliding groove and the connecting cavity I, which is used to provide the power for resetting the swing plate and to transmit the extrusion force on the swing plate to the cooling water, thereby changing the flow state of the cooling water.

[0012] Preferably, two symmetrical extension blocks are provided on both sides of the end of the movable seat away from the center of the rolling roller I, and a positioning rod is provided between the opposite ends of the two extension blocks. A hinge seat is provided at the center of the side of the swing plate facing the movable seat. The hinge seat is hinged to the positioning rod and is used to provide a base point for the circumferential swing of the swing plate.

[0013] Preferably, the opening of the sliding groove is provided with a swing groove, and the cross-section of the space formed between the opening of the swing groove and the opening of the sliding groove is an isosceles trapezoid shape. The width of the opening of the swing groove is greater than the width of the opening of the sliding groove, so as to provide space for the swing plate to swing circumferentially.

[0014] Preferably, the rolling roller I and rolling roller II have different diameters but the same structure.

[0015] This application has the following beneficial effects:

[0016] This application provides a grinding device for color paste in the preparation of digital printing ink. The coating to be ground in the grinding chamber is gradually squeezed and rubbed by the central roller against the pressing roller I, pressing roller II, grinding roller I, grinding roller II, and grinding roller III. Through multiple squeezing and rubbing of the pressing roller I against the pressing roller II, the pressing roller II against the grinding roller I, the grinding roller I against the grinding roller II, and the grinding roller II against the grinding roller III, a larger grinding area and grinding time are obtained, thereby improving the fineness of grinding.

[0017] Meanwhile, by designing the grinding chamber to gradually reduce the space from the inlet to the outlet, and based on this spatial variation, the diameters of the grinding rollers I, II, I, II, and III decrease from large to small, allowing the ink to gradually converge as it moves toward the outlet. Due to the reduced space and the squeezing effect between the rollers, the pressure gradually increases, resulting in a stronger grinding effect.

[0018] Meanwhile, by setting movable swing plates on rollers I and II, during the rotation of rollers I and II, a portion of ink will be trapped in the space between the swing plates and the surfaces of the rollers (including rollers I and roller II). Then, during the rotation, the swing plates can tangentially contact the center roller or the swing plates on rollers I and II can contact each other, causing the swing plates to move towards the center of the rollers, squeezing and grinding the ink trapped between the swing plates and the rollers, thereby improving the grinding effect.

[0019] Meanwhile, by hinged to the movable seat and a swing groove for circumferential swinging is provided at the sliding groove port on the rolling roller, the swing plate will swing in the direction of the tangential extrusion force when it tangentially contacts the center roller, tangentially contacts the swing plate on another rolling roller, and tangentially contacts the inner wall of the grinding chamber. At this time, the swing plate also moves towards the center of the rolling roller, so that the swing plate performs tangential friction, extrusion and grinding on the ink trapped between the swing plate and the rolling roller.

[0020] Meanwhile, as the swing plate moves the movable seat toward the center of the rolling roller, it squeezes the cooling water at the bottom of the sliding groove, causing the cooling water at the bottom of the sliding groove to be squeezed into the connecting cavity I through the connecting cavity II. This causes the water flow in the connecting cavity I and the cooling cavity to be impacted by water flow in different directions, thereby increasing the degree of turbulence, increasing the contact amount between the cooling water and the rolling roller per unit time, and improving the cooling effect. Attached Figure Description

[0021] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles disclosed in this application.

[0022] This application can be more clearly understood with reference to the accompanying drawings and the following detailed description, wherein:

[0023] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure distribution of the present invention;

[0025] Figure 3 This is a schematic diagram of the internal structure distribution of the grinding chamber of the present invention;

[0026] Figure 4 This is a schematic diagram of the internal structure distribution of the roller of the present invention;

[0027] Figure 5 This is a schematic diagram of the three-dimensional structure of the rolling roller of the present invention;

[0028] Figure 6 This is a schematic diagram of the internal coolant flow space of the rolling mill of the present invention;

[0029] Figure 7 This is a schematic diagram of the structural combination of the movable seat and the swing plate of the present invention;

[0030] Figure 8 This is a schematic diagram of the movable seat structure of the present invention;

[0031] Figure 9 This is a schematic diagram of the swing plate structure of the present invention.

[0032] Figure label:

[0033] 1. Processing box; 2. Grinding chamber; 3. Feed inlet; 4. Discharge outlet; 5. Center roller; 6. Roller I; 7. Roller II; 8. Grinding roller I; 9. Grinding roller II; 10. Grinding roller III; 11. Converging chamber; 12. Cooling chamber; 13. Connecting chamber I; 131. Connecting chamber II; 14. Transition groove; 15. Water inlet; 16. Slip ring; 17. Infusion pipe; 18. Sliding groove; 19. Swing groove; 20. Movable seat; 21. Extension block; 22. Positioning rod; 23. Swing plate; 24. Hinge seat. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0035] Example 1

[0036] Please see Figures 1 to 3 A grinding device for preparing digital printing ink paste includes a processing box 1, a grinding chamber 2 inside the processing box 1, a feed inlet 3 at the top of the processing box 1 connected to the top of the grinding chamber 2, and a discharge outlet 4 on one side of the processing box 1 connected to one side of the grinding chamber 2, so that the ink to be ground can be fed into the grinding chamber 2 through the feed inlet, and then subjected to extrusion and friction grinding by the central roller 5, pressing roller I 6, pressing roller II 7, grinding roller I 8, grinding roller II 9 and grinding roller III 10 in the grinding chamber 2, and gradually moved towards the discharge outlet 4 under the drive of these rollers, and finally discharged from the grinding chamber 2 through the discharge outlet 4 after grinding is completed.

[0037] See Figures 1 to 3 A central roller 5 is movably sleeved inside the grinding chamber 2. The two ends of the central roller 5 protrude from the two ends of the processing box 1. The inner wall of the grinding chamber 2 away from the central roller 5 is arc-shaped, and the center of the arc is close to the feed port 3. The space of the grinding chamber 2 continuously narrows from the feed port 3 to the discharge port 4, so that the ink can gradually converge as it flows from the feed port 3 to the discharge port 4. Due to the narrowing space and the squeezing effect between the rollers, the pressure gradually increases, so that the grinding pressure continuously increases, thereby obtaining a stronger grinding effect.

[0038] See Figures 1 to 3The grinding chamber 2 is movably fitted with rolling rollers I6, II7, I8, II9, and III10. The ends of rolling rollers I6, II7, I8, II9, and III10 extend outwards from both ends of the processing box 1, allowing the existing power unit to transmit power through these protruding ends. Rollers I6, II7, I8, II9, and III10 are arranged circumferentially from the feed inlet 3 to the discharge outlet 4. The diameter of roller 10 gradually decreases, allowing rollers I6, II7, I8, II9, and III10 to adapt to the gradually decreasing space of the grinding chamber 2. There are gaps between rollers I6, II7, I8, II9, and III10 and the arc-shaped inner wall of the grinding chamber 2, and gaps between rollers I6, II7, I8, II9, and III10 and the center roller 5. This allows ink to flow through these gaps and be subjected to the squeezing force provided between the rollers during the flow, resulting in frictional grinding.

[0039] The center roller 5, rolling roller I 6, rolling roller II 7, grinding roller I 8, grinding roller II 9 and grinding roller III 10 are driven by transmission devices, such as existing belt drives or stepper motors.

[0040] The center roller 5 rotates in the opposite direction to the rolling rollers I6, II7, I8, II9 and III10. Due to the different rotation directions, the material will be subjected to strong compression, friction and cross shearing between the rollers, thereby achieving a highly efficient grinding effect.

[0041] Example 2

[0042] Please see Figures 1 to 3 Based on Example 1, the diameter values ​​of roller I6 and roller II7 are different, but their structures are the same.

[0043] See Figures 4 to 6The roller I6 has symmetrical converging cavities 11 at both ends and symmetrical transition grooves 14 on the outer sides of both ends. The transition grooves 14 are annular and have water inlets 15 between them. A ring-shaped slip ring 16 is movably fitted onto the groove opening of the transition groove 14 away from the converging cavity 11, so that the slip ring 16 does not rotate synchronously when the roller I6 rotates. A liquid inlet pipe 17 is fixedly connected to the slip ring 16 and communicates with the transition groove 14, so that cooling water can still be input into the transition groove 14 through the liquid inlet pipe 17 and into the converging cavity 11 through the water inlet 15 during the rotation of the roller I6. One end of the liquid inlet pipe 17 is used to input cooling water into the roller I6, while the other end of the liquid inlet pipe 17 is used to discharge the heat-absorbing cooling water in the roller I6.

[0044] See Figure 4 , Figure 6 The roller I6 has circumferentially distributed cooling chambers 12 inside. A connecting chamber I13 is provided on one side of the center of the roller I6. The two ends of the connecting chamber I13 are connected to the converging chambers 11 on both sides, so that the coolant input into the roller I6 can flow in the cooling chamber 12 through the connecting chamber I13, thereby cooling the roller I6 and preventing overheating from affecting the physical properties of the ink.

[0045] Example 3

[0046] Please see Figures 4 to 9 Based on Embodiment 2, the rolling roller I6 has circumferentially distributed sliding grooves 18. A movable seat 20 is movably fitted within the sliding grooves 18, and the movable seat 20 cannot detach from the sliding grooves 18. A swing plate 23 is provided at the end of the movable seat 20 furthest from the rolling roller I6. The cross-section of the swing plate 23 is arc-shaped, and the center of the arc of the swing plate 23 coincides with the center of the rolling roller I6. Rounded corners are provided at both ends of the arc of the swing plate 23, so that when the swing plate 23 rotates in the same direction as the rolling roller I6, the side of the swing plate 23 on the rolling roller I6 will first contact the center roller 5, the swing plate 23 on the rolling roller II 7, and the arc-shaped inner wall of the grinding chamber 2, while the grinding... When the pressure roller II7 drives the swing plate 23 to rotate in the same direction, the side of the swing plate 23 on the pressure roller II7 will first contact the center roller 5, the swing plate 23 on the pressure roller II7, the grinding roller I8, and the arc-shaped inner wall of the grinding chamber 2. At this time, the rounded corner design will ensure the tangential contact of the swing plate 23, so that the swing plate 23 moves towards the center of the pressure roller under the extrusion pressure (including the pressure roller I6 and the pressure roller II7, the swing plate 23 on the pressure roller I6 moves towards the center of the pressure roller I6, and the swing plate 23 on the pressure roller II7 moves towards the center of the pressure roller II7), and squeezes and grinds the ink trapped between the swing plate 23 and the pressure roller, thereby improving the grinding effect.

[0047] See Figure 4A connecting cavity II 131 is provided between the bottom of the sliding groove 18 and the connecting cavity I 13, allowing the cooling water flowing in the connecting cavity I 13 to enter the sliding groove 18 through the connecting cavity II 131. When the swing plate 23 is not subjected to external pressure, it pushes the movable seat 20 to move the swing plate 23 away from the rolling roller I 6. Alternatively, when the swing plate 23 is subjected to external pressure, the swing plate 23 can move the movable seat 20 towards the center of the rolling roller I 6, so that the cooling water at the bottom of the sliding groove 18 is squeezed into the connecting cavity I 13 through the connecting cavity II 131. This causes the water flow in the connecting cavity I 13 and the cooling cavity 12 to be impacted by water flow in different directions, thereby increasing the degree of turbulence, increasing the contact amount between the cooling water and the rolling roller per unit time, and improving the cooling effect.

[0048] Example 4

[0049] Please see Figures 4 to 5 Based on Embodiment 3, the opening of the sliding groove 18 is provided with a swing groove 19. The cross-section of the space formed between the opening of the swing groove 19 and the opening of the sliding groove 18 is an isosceles trapezoid. The width of the opening of the swing groove 19 is greater than the width of the opening of the sliding groove 18. The existence of the swing groove 19 will provide a movable space for the swing plate 23 to swing in the circumferential direction.

[0050] See Figures 4 to 9 Two symmetrical extension blocks 21 are fixedly connected to the two sides of the end of the movable seat 20 away from the center of the rolling roller I6. A positioning rod 22 is fixedly connected between the opposite ends of the two extension blocks 21. A hinge seat 24 is fixedly connected to the center of the side of the swing plate 23 facing the movable seat 20. The hinge seat 24 is hinged to the positioning rod 22. When the swing plate 23 is in tangential contact with the center roller 5, in tangential contact with the swing plate 23 on another rolling roller, in tangential contact with the grinding roller I8, and in tangential contact with the inner wall of the grinding chamber 2, the swing plate 23 will be driven to swing in the direction of the extrusion force with the positioning rod 22 as the base point due to the tangential extrusion force. At this time, the swing plate 23 also moves towards the center of the rolling roller, so that the swing plate 23 performs tangential friction extrusion grinding on the ink wrapped between the swing plate 23 and the rolling roller.

Claims

1. A colorant paste grinding device for digital printing ink preparation, characterized by, Comprising A processing box (1) with a grinding cavity (2) providing a grinding space, an inlet (3) for feeding ink into the grinding cavity (2), and an outlet (4) for discharging ink from the grinding cavity (2); A grinding roller set including a central roller (5), a crushing roller I (6), a crushing roller II (7), a grinding roller I (8), a grinding roller II (9), and a grinding roller III (10) movably sleeved in the grinding cavity (2) to form a space for crushing and rubbing ink between the rollers; A crushing device including a plurality of sliding grooves (18) evenly distributed on the crushing roller I (6), a movable seat (20) sleeved in the sliding grooves (18), and a swing plate (23) provided at an end of the movable seat (20) away from the crushing roller I (6) to contact external pressure and move the swing plate (23) to extrude and grind ink between the swing plate (23) and the crushing roller I (6); An inner cavity wall of the grinding cavity (2) away from the central roller (5) is arc-shaped, with a center point of the arc close to the inlet (3), and the space of the grinding cavity (2) continuously decreases from the inlet (3) to the outlet (4) to concentrate ink and increase pressure; The crushing roller I (6), the crushing roller II (7), the grinding roller I (8), the grinding roller II (9), and the grinding roller III (10) are arranged circumferentially from the inlet (3) to the outlet (4), and the diameters of the crushing roller I (6), the crushing roller II (7), the grinding roller I (8), the grinding roller II (9), and the grinding roller III (10) gradually decrease to adapt to the continuously decreasing space of the grinding cavity (2); Symmetrical converging cavities (11) are formed in both ends of the crushing roller I (6), symmetrical transition grooves (14) are formed on the outer sides of both ends of the crushing roller I (6), communication water transfer holes (15) are formed between the transition grooves (14) and the converging cavities (11), ring-shaped sliding rings (16) are sleeved in the grooves of the transition grooves (14) away from the converging cavities (11), liquid transfer pipes (17) are provided on the sliding rings (16) to communicate with the transition grooves (14) to provide input and output of cooling liquid, circumferentially evenly distributed cooling cavities (12) are formed in the crushing roller I (6), a connecting cavity I (13) is formed on one side of the center of the crushing roller I (6), and both ends of the connecting cavity I (13) are connected with the converging cavities (11) on both sides to form a flow space for cooling water in the crushing roller I (6); A connecting cavity II (131) is formed in communication between the groove bottom of the sliding groove (18) and the connecting cavity I (13) to provide a restoring force for the swing plate (23) and transfer the extrusion force received by the swing plate (23) to the cooling water to change the flow state of the cooling water.

2. A colorant paste grinding device for preparing a digital printing ink according to claim 1, characterized in that, The central roller (5) rotates in the opposite direction of the crushing roller I (6), the crushing roller II (7), the grinding roller I (8), the grinding roller II (9), and the grinding roller III (10) to provide stronger extrusion, shearing, and friction force to the ink between the rollers.

3. The colorant paste grinding device for preparing a digital printing ink according to claim 1, wherein The cross section of the swing plate (23) is arc-shaped, the center of the arc-shaped swing plate (23) coincides with the center of the rolling roller I (6), and two ends of the arc-shaped swing plate (23) are provided with rounded surfaces for smoothly contacting and approaching when the swing plate (23) follows the rolling roller I (6) to rotate.

4. The colorant paste grinding device for preparing a digital printing ink according to claim 1, wherein Two symmetric extension blocks (21) are arranged on both sides of the end of the movable seat (20) away from the center of the rolling roller I (6), a positioning rod (22) is arranged between the opposite ends of the two extension blocks (21), a hinged seat (24) is arranged on the center of the side of the swing plate (23) opposite to the movable seat (20), and the hinged seat (24) is hinged on the positioning rod (22) to provide a base point for the circumferential swing of the swing plate (23).

5. A colorant paste grinding device for preparing a digital printing ink according to claim 4, characterized in that, The slot of the sliding groove (18) is provided with a swing groove (19), the space formed between the slot of the swing groove (19) and the slot of the sliding groove (18) is in the shape of an isosceles trapezoid, and the slot width value of the swing groove (19) is greater than the slot width value of the sliding groove (18) to provide a space for the circumferential swing of the swing plate (23).

6. A colorant paste grinding device for preparing a digital printing ink according to claim 5, characterized in that, The diameters of the rolling roller I (6) and the rolling roller II (7) are different, and the structures are the same.

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