Ink agitation structure and agitation device

Abstract

An ink agitation structure, comprising an ink tank (1), a plate cylinder (2) provided in the ink tank (1), and an ink agitation rod (3) provided beside the plate cylinder (2). The outer wall of the ink agitation rod (3) is formed by connecting two symmetrically arranged conical surfaces (31), the diameters of the two ends of the ink agitation rod (3) are greater than the diameter of the middle of the ink agitation rod (3), and the diameters of the two ends of the ink agitation rod (3) are equal.

Description

Ink stirring structure and stirring device Technical Field

[0001] The utility model relates to the technical field of gravure printing, and more specifically, to an ink stirring structure and a stirring device. Background Art

[0002] In gravure printing, solvent evaporation within the ink tank reduces ink uniformity, leading to the formation of ink flakes and clumps on the surface. Once the ink is carried by the plate roller, it becomes difficult for the scraper to scrape cleanly, resulting in defects such as smearing and knife lines on the printed product. This problem can be solved by allowing the ink to "flow" and continuously mix it, which naturally avoids this problem. There are two ways to circulate the ink: using an ink circulation pump or placing an ink stirrer in the ink tank to create ink flow. In actual production, a combination of these two methods is more common.

[0003] The prior art discloses a magnetic ink stirring rod structure for a gravure printing machine, comprising: a floating magnetic rod and an immersed magnetic rod arranged in parallel, the immersed magnetic rod being located below the floating magnetic rod, the floating magnetic rod and the immersed magnetic rod being movably attached to the outer wall of the same printing roller; a fixing mechanism, the fixing mechanism being used to fix the position of the immersed magnetic rod, and the immersed magnetic rod being rotatably connected to the fixing mechanism. When printing, the floating magnetic rod first floats on the surface of the ink, while the immersed magnetic rod is limited by the fixing mechanism and immersed in the ink in the oil tank; at the same time, both the floating magnetic rod and the immersed magnetic rod can generate magnetic attraction with the printing roller, so that during the printing process, the floating magnetic rod can be driven by the printing roller to stir the ink on the surface, and at the same time, the immersed magnetic rod immersed in the ink is also driven by the printing roller to stir the ink in the oil tank, thereby increasing the stirring range, making the stirring range of the ink wider and the stirring effect better, thereby ensuring the uniformity of printing and improving the printing quality and effect.

[0004] However, the ink stirring rod in the prior art is straight-cylinder-shaped, which cannot evenly move all the ink in the ink tank. In particular, it is easy for the ink to accumulate at the corners of the ink tank, causing the ink to form a crust when it is left standing. There is a technical problem that the corners of the ink tank cannot be evenly stirred.

[0005] Utility Model Content

[0006] The purpose of the utility model is to overcome the deficiency in the prior art that the corners of an ink tank cannot be stirred evenly, and to provide an ink stirring structure and a stirring device.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] An ink stirring structure includes an ink tank, a plate roller arranged in the ink tank, and an ink stirring rod arranged next to the plate roller. The outer wall of the ink stirring rod is formed by two symmetrically arranged conical surfaces connected together, and the diameters of the two ends of the ink stirring rod are larger than the diameter of the middle part of the ink stirring rod, and the diameters of the two ends of the ink stirring rod are equal.

[0009] The utility model discloses an ink stirring structure, in which an ink stirring rod is arranged beside a plate roller, and the ink stirring rod can stir the ink in the ink tank, and continuously mix and flow the ink, thereby preventing the ink uniformity near the plate roller from being reduced and causing ink skin and ink blocks to form on the surface of the plate roller; since the outer wall of the ink stirring rod is formed by connecting two symmetrically arranged conical surfaces, and the diameters of the two ends of the ink stirring rod are larger than the diameter of the middle part of the ink stirring rod, the outer contour of the ink stirring rod is narrow in the middle and thick at both ends. Compared with the conventional straight-cylinder ink stirring rod, when the ink stirring rod of the utility model rotates, the middle taper design can make the ink on both sides of the ink tank flow toward the middle, and can achieve the effect of forcing the ink to flow from the corner position to the middle; setting the diameters of the two ends of the ink stirring rod to be equal, the degree of flow of the ink at the corner positions at both ends of the ink tank to the middle is the same, thereby ensuring that the ink at each position in the ink tank can flow evenly, and effectively solving the technical problem that the corner positions of the ink tank cannot be evenly stirred in the prior art.

[0010] Furthermore, the conical surface is spirally wound with raised wavy lines, which extend from the connecting sides of the two conical surfaces to the two ends of the ink stirring rod, and the raised wavy lines are symmetrically distributed on the two conical surfaces. Since the raised wavy lines extend from the connecting sides of the two conical surfaces to the two ends of the ink stirring rod, when the ink stirring rod rotates, the raised wavy lines spirally wound at both ends of the conical surface will continuously push the ink at the edge of the ink tank toward the center to form turbulence. The raised wavy lines drive the surface of the ink, causing the surface ink to move, thereby stirring the ink evenly. The raised wavy lines are symmetrically distributed on the two conical surfaces to ensure that the ink flowing at both ends can evenly convect and offset the fluctuations, avoiding the formation of oscillations in the ink tank.

[0011] Furthermore, the angle formed between the winding direction of the protruding wavy lines on the conical surface and the axial direction of the ink stirring rod is 45°-60°. The angle formed between the winding direction of the protruding wavy lines on the conical surface and the axial direction of the ink stirring rod is set to 45°-60°. Within this angle range, the protruding wavy lines can effectively promote the ink, maximize the flow of ink, and ensure uniform and smooth flow of ink while preventing the ink from forming a skin when it is left standing.

[0012] Furthermore, the pitch between adjacent protruding corrugated lines on the same conical surface is 15mm-25mm. The pitch between adjacent protruding corrugated lines on the same conical surface is set to 15mm-25mm. Within this numerical range, the pitch between the protruding corrugated lines can effectively promote the flow of ink.

[0013] Furthermore, the conical surface has a taper of 30°-60°. Setting the taper of the conical surface to 30°-60°, the conical surface angle within this angle range can effectively gather the ink at the corners of the ink grooves on both sides toward the center, achieving the effect of forcing the ink to flow from the corners to the center.

[0014] Furthermore, a gap is provided between the outer wall of the ink stirring rod and the outer wall of the plate roller. Providing a gap between the outer wall of the ink stirring rod and the outer wall of the plate roller prevents the ink stirring rod from directly contacting the plate roller and causing wear. The existing ink stirring rod is always closely attached to the plate roller and rotates in the opposite direction. Under long-term contact operation, it is very easy to wear. If the ink stirring rod of the utility model directly contacts the plate roller, the raised corrugated line will wear out, and the stirring ability will be rapidly reduced. Therefore, providing a gap between the outer wall of the ink stirring rod and the outer wall of the plate roller can extend the service life of the ink stirring rod.

[0015] Furthermore, the ink stirring rod is a hollow structure. Setting the ink stirring rod as a hollow structure can reduce the weight of the ink stirring rod, reduce the kinetic energy required to drive the ink stirring rod to rotate, and make the stirring structure more lightweight.

[0016] Furthermore, the ink stirring rod is made of an aluminum alloy tube or a wear-resistant plastic coated paper tube. The ink stirring rod is made of an aluminum alloy tube or a wear-resistant plastic coated paper tube, which makes the processing and use of the ink stirring rod more convenient.

[0017] An ink stirring device includes an ink stirring structure, a frame, a rotating shaft arranged at both ends of the frame, and a driving device arranged on the frame and used to drive the rotating shaft to rotate. The ink tank is fixed to the frame, and the two ends of the ink stirring rod are respectively connected to the rotating shaft at both ends.

[0018] The utility model discloses an ink stirring device, in which a driving device for driving the rotating shaft to rotate is installed on a frame, and the rotating shafts at both ends are fixedly connected to the two ends of the ink stirring rod respectively, thereby realizing independent driving rotation and adjustable speed of the ink stirring rod; since the ink stirring rod in the prior art is driven to rotate by fitting with the plate roller, the slight vibration of the plate roller and the uneven contact of the corrugated lines on the surface of the ink stirring rod will cause jittering. The impact of jittering on actual production is that the ink is easily thrown out of the ink groove by the ink stirring rod and flies to the surface of the product to form excess ink dots, and the two ends of the existing ink stirring rod are connected by magnetic attraction but not fixedly connected, and are prone to wear. Therefore, the ink stirring device of the utility model realizes independent driving rotation of the ink stirring rod, thereby avoiding the occurrence of jittering, flying ink and wear at both ends of the ink stirring rod.

[0019] Furthermore, the rotating shafts at both ends can be synchronously raised and lowered vertically along the frame. Since the rotating shafts at both ends can be synchronously raised and lowered vertically along the frame, the immersion depth of the ink stirring rod in the ink tank can be adjusted, achieving different stirring effects.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The utility model provides an ink stirring structure. When the ink stirring rod rotates, the tapered design in the middle can make the ink on both sides of the ink groove flow toward the middle, which can achieve the effect of forcing the ink to flow from the corners to the middle, and effectively solves the technical problem in the prior art that the corners of the ink groove cannot be evenly stirred.

[0022] The utility model discloses an ink stirring device, in which a driving device for driving the rotating shaft to rotate is installed on a frame, and the rotating shafts at both ends are fixedly connected to the two ends of the ink stirring rod respectively, thereby realizing independent driving rotation and adjustable speed of the ink stirring rod, avoiding the occurrence of shaking, flying ink and wear at both ends of the ink stirring rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic structural diagram of an ink stirring structure of the present invention;

[0024] Figure 2 is a schematic structural diagram of a straight-cylinder ink stirring stick with raised wavy lines;

[0025] FIG3 is a schematic structural diagram of an ink stirring device of the present invention.

[0026] In the accompanying drawings: 1. ink tank; 2. plate roller; 3. ink stirring rod; 31. conical surface; 32. raised corrugated line; 4. frame; 5. rotating shaft; 6. driving device. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic, not actual, representations. They should not be construed as limiting this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted from the drawings.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and so on indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] Example 1

[0030] FIG. 1 and FIG. 2 show a first embodiment of an ink stirring structure of the present invention.

[0031] An ink stirring structure includes an ink tank 1, a plate roller 2 disposed within the ink tank 1, and an ink stirring rod 3 disposed adjacent to the plate roller 2. The outer wall of the ink stirring rod 3 is formed by connecting two symmetrically arranged conical surfaces 31. The diameters of the two ends of the ink stirring rod 3 are larger than the diameter of the middle portion of the ink stirring rod 3, and the diameters of the two ends of the ink stirring rod 3 are equal. Raised wavy lines 32 are spirally wound around the conical surfaces 31. The raised wavy lines 32 extend from the connecting sides of the two conical surfaces 31 to the two ends of the ink stirring rod 3, and are symmetrically distributed on the two conical surfaces 31. The winding direction of the raised wavy lines 32 on the conical surface 31 forms an angle of 45°-60° with the axial direction of the ink stirring rod 3. The pitch between adjacent raised wavy lines 32 on the same conical surface 31 is 15mm-25mm. The taper of the conical surface 31 is 30°-60°.

[0032] The ink stirring rod 3 is provided next to the plate roller 2, and the ink stirring rod 3 can stir the ink in the ink tank 1, and the ink is mixed and flowed continuously, so as to avoid the ink uniformity near the plate roller 2 being reduced, resulting in the formation of ink skin and ink blocks on the surface of the plate roller 2; because the outer wall of the ink stirring rod 3 is formed by two symmetrically arranged conical surfaces 31, and the diameters of the two ends of the ink stirring rod 3 are larger than the diameter of the middle part of the ink stirring rod 3, the outer contour of the ink stirring rod 3 is narrow in the middle and thick at both ends. Compared with the conventional straight-cylinder ink stirring rod 3, the ink stirring rod 3 of the utility model is rotated. The middle taper design can make the ink on both sides of the ink tank 1 flow toward the middle, and can achieve the effect of forcing the ink to flow from the corner position to the middle; setting the diameters of the two ends of the ink stirring rod 3 to be equal, the ink at the corner positions at both ends of the ink tank 1 can be made to flow toward the middle to the same extent, ensuring that the ink at each position in the ink tank 1 can flow evenly, effectively solving the technical problem that the corner positions of the ink tank 1 cannot be evenly stirred in the prior art.

[0033] In this embodiment, as shown in Figure 1, since the raised wavy lines 32 extend from the two ends of the ink stirring rod 3 on the adjacent sides of the two conical surfaces 31, when the ink stirring rod 3 rotates, the raised wavy lines 32 spirally wound at both ends of the conical surface 31 will continuously push the ink on the edge of the ink tank 1 toward the middle to form turbulence. The raised wavy lines 32 drive the surface of the ink, allowing the surface ink to move, thereby stirring the ink evenly. The raised wavy lines 32 are symmetrically distributed on the two conical surfaces 31 to ensure that the ink flowing at both ends can evenly convect and offset the fluctuations, thereby avoiding the formation of oscillations in the ink tank 1.

[0034] In addition, in this embodiment, as shown in FIG. 2 , the raised corrugated lines 32 may be symmetrically distributed on the straight cylindrical ink stirring rod 3 , which also serves to drive the surface of the ink, allowing the surface ink to move, thereby stirring the ink evenly.

[0035] In this embodiment, as shown in FIG1 , the angle formed between the winding direction of the raised wavy lines 32 on the conical surface 31 and the axial direction of the ink stirring rod 3 is set to 45°-60°. The raised wavy lines 32 within this angle range can effectively push the ink, maximize the flow rate of the ink, and allow the ink to flow evenly and smoothly while preventing the ink from forming a crust when it is left standing.

[0036] In this embodiment, as shown in FIG1 , the pitch between adjacent protruding corrugated lines 32 on the same conical surface 31 is set to 15 mm-25 mm. Within this numerical range, the pitch between the protruding corrugated lines 32 can effectively promote the flow of ink.

[0037] In this embodiment, as shown in Figure 1, the taper of the conical surface 31 is set to 30°-60°. The angle of the conical surface 31 within this angle range can effectively gather the ink at the corners of the ink grooves 1 on both sides to flow toward the middle, thereby achieving the effect of forcing the ink to flow from the corners to the middle.

[0038] Example 2

[0039] FIG1 shows a second embodiment of an ink stirring structure according to the present invention.

[0040] This embodiment is similar to the first embodiment, except that a gap is provided between the outer wall of the ink stirring rod 3 and the outer wall of the plate roller 2. The ink stirring rod 3 is a hollow structure. The ink stirring rod 3 is composed of an aluminum alloy tube or a wear-resistant plastic-coated paper tube.

[0041] In this embodiment, as shown in Figure 1, a distance is set between the outer wall of the ink stirring rod 3 and the outer wall of the plate roller 2 to avoid wear caused by direct contact between the ink stirring rod 3 and the plate roller 2. The existing ink stirring rod 3 always rotates in the opposite direction close to the plate roller 2, and is very prone to wear under long-term contact operation. If the ink stirring rod 3 of the utility model is in direct contact with the plate roller 2, the raised corrugated line 32 will be worn, and the stirring ability will drop rapidly. Therefore, setting a distance between the outer wall of the ink stirring rod 3 and the outer wall of the plate roller 2 can increase the service life of the ink stirring rod 3.

[0042] In this embodiment, the ink stirring rod 3 is configured as a hollow structure, which can reduce the weight of the ink stirring rod 3 and the kinetic energy required to drive the ink stirring rod 3 to rotate, thereby making the stirring structure more lightweight.

[0043] In this embodiment, the ink stirring rod 3 is made of an aluminum alloy tube or a wear-resistant plastic-coated paper tube, which makes the processing and use of the ink stirring rod 3 more convenient.

[0044] Example 3

[0045] FIG3 shows an embodiment of an ink stirring device according to the present invention.

[0046] An ink stirring device includes an ink stirring structure, a frame 4, rotating shafts 5 provided at both ends of the frame 4, and a driving device 6 provided on the frame 4 and used to drive the rotating shafts 5 to rotate. An ink tank 1 is fixedly provided on the frame 4, and both ends of the ink stirring rod 3 are respectively connected to the rotating shafts 5. The rotating shafts 5 at both ends can be vertically raised and lowered synchronously along the frame 4.

[0047] In this embodiment, as shown in Figure 3, a driving device 6 for driving the rotating shaft 5 to rotate is installed on the frame 4, and the rotating shafts 5 at both ends are fixedly connected to the two ends of the ink stirring rod 3, respectively, to achieve independent drive rotation and adjustable speed of the ink stirring rod 3; since the ink stirring rod 3 in the prior art is driven to rotate by fitting with the plate roller 2, the slight vibration of the plate roller 2 and the uneven contact of the corrugated lines on the surface of the ink stirring rod 3 will cause jittering. The impact of jittering on actual production is that the ink is easily thrown out of the ink tank 1 by the ink stirring rod 3 and flies to the surface of the product to form excess ink dots. In addition, the two ends of the existing ink stirring rod 3 are connected by magnetic attraction but not fixedly connected, and are prone to wear. Therefore, the ink stirring device of the utility model realizes the independent drive rotation of the ink stirring rod 3, avoids the occurrence of jittering, flying ink and wear at both ends of the ink stirring rod 3.

[0048] In this embodiment, since the rotating shafts 5 at both ends can be vertically lifted and lowered synchronously along the frame 4, the immersion depth of the ink stirring rod 3 in the ink tank 1 can be adjusted, thereby achieving different stirring effects.

[0049] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. An ink stirring structure, characterized in that: The invention comprises an ink tank (1), a plate roller (2) arranged in the ink tank (1), and an ink stirring rod (3) arranged beside the plate roller (2); the outer wall of the ink stirring rod (3) is formed by connecting two symmetrically arranged conical surfaces (31); the diameters of the two ends of the ink stirring rod (3) are larger than the diameter of the middle part of the ink stirring rod (3); and the diameters of the two ends of the ink stirring rod (3) are equal.

2. An ink stirring structure according to claim 1, characterized in that: A protruding corrugated line (32) is spirally wound on the conical surface (31), and the protruding corrugated line (32) extends from the connecting sides of the two sections of the conical surface (31) to the two ends of the ink stirring rod (3), and the protruding corrugated line (32) is symmetrically distributed on the two sections of the conical surface (31).

3. An ink stirring structure according to claim 2, characterized in that: The angle formed between the winding direction of the protruding corrugated line (32) on the conical surface (31) and the axial direction of the ink stirring rod (3) is 45°-60°.

4. An ink stirring structure according to claim 2, characterized in that: The pitch between adjacent protruding corrugation lines (32) on the same conical surface (31) is 15 mm to 25 mm.

5. The ink stirring structure according to claim 1, characterized in that: The conical surface (31) has a taper of 30°-60°.

6. The ink stirring structure according to claim 1, characterized in that: A distance is provided between the outer wall of the ink stirring rod (3) and the outer wall of the plate roller (2).

7. An ink stirring structure according to claim 1, characterized in that: The ink stirring rod (3) is a hollow structure.

8. An ink stirring structure according to claim 7, characterized in that: The ink stirring rod (3) is composed of an aluminum alloy tube or a wear-resistant plastic coated paper tube.

9. An ink stirring device, comprising the ink stirring structure according to any one of claims 1 to 8, characterized in that: The ink tank (1) further comprises a frame (4), a rotating shaft (5) arranged at two ends of the frame (4), and a driving device (6) arranged at the frame (4) and used for driving the rotating shaft (5) to rotate. The ink tank (1) is fixedly arranged on the frame (4), and two ends of the ink stirring rod (3) are respectively connected to the rotating shaft (5) at two ends.

10. An ink stirring device according to claim 9, characterized in that: The rotating shafts (5) at both ends can be vertically lifted and lowered synchronously along the frame (4).

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