Ink flow divider, ink path circulating system, printing equipment and printing production line

Abstract

The utility model belongs to the technical field of printing equipment, and particularly relates to an ink flow divider, an ink path circulating system, printing equipment and a printing production line. The ink flow divider comprises a main body piece, a hollow containing cavity is formed in the main body piece, the main body piece is provided with an ink inlet communicated with the containing cavity and a plurality of flow dividing openings, the flow dividing openings are annularly distributed, and the axis of the ink inlet is located in the center of an area defined by the flow dividing openings, so that the distances between the ink inlet and the flow dividing openings are the same. Starting from the structure of the flow divider, the flow divider is designed to be circular, the distances between the flow dividing openings and the ink inlet are the same, and the printing uniformity is improved through structural improvement.

Description

Technical Field

[0001] This application belongs to the technical field of printing equipment, and particularly relates to an ink splitter, an ink path circulation system, a printing device, and a printing production line. Background Art

[0002] A UV printing device is a printing device that realizes fast and high-quality printing through ultraviolet curing technology. The print head ejects tiny ink droplets according to image data, and these ink droplets land on the surface of the printing medium. The UV lamp installed near the print head emits ultraviolet light, causing the photosensitizer in the ink to undergo a chemical reaction and quickly solidify into a solid ink layer, achieving the effect of drying immediately after printing.

[0003] In order to form a uniform inkjet effect, UV printing devices often work synchronously through multiple print heads. In related technologies, an ink splitter is often used to split the ink. Regarding this type of inkjet printing technology, due to the presence of an air layer in the ink splitter, the ink has a certain fluctuation, and during the inkjet printing process, the ink flow during ink replenishment will exacerbate the degree of liquid fluctuation. And the splitters on the market are often rectangular structures. The distances between the split ports and the ink inlet of the splitter at different positions are different, that is, the flow path lengths from the ink inlet to each split port are different during the splitting process. Due to the different flow path lengths and different flow times, the ink fluctuation amplitude will be attenuated to different degrees at different split ports, resulting in a large difference in the ink pressure and flow rate provided to each print head from the split ports, thus leading to uneven printing effects and poor consistency of each print head. Summary of the Utility Model

[0004] This application aims to at least solve to some extent the technical problem of uneven inkjet printing caused by pressure fluctuations. For this purpose, this application provides an ink splitter, an ink path circulation system, a printing device, and a printing production line.

[0005] In a first aspect, an embodiment of this application provides an ink splitter, including:

[0006] A main body member, a hollow accommodation cavity is provided in the main body member, an ink inlet and a plurality of split ports communicating with the accommodation cavity are provided on the main body member, the plurality of split ports are annularly distributed, and the axis of the ink inlet is located at the center of the area surrounded by the plurality of split ports, so that the distances between the ink inlet and each of the split ports are the same.

[0007] Based on the structure of the splitter itself, the embodiment of this application designs the structure of the splitter as circular, so that the distances between each split port and the ink inlet are the same, and improves the printing uniformity through structural improvement.

[0008] In some embodiments, a fluctuation absorber and an ink inlet pipe are further included. Along the ink conveying direction, the fluctuation absorber seals and divides the accommodation cavity into a damping cavity and a shunt cavity; the ink inlet pipe penetrates through the main body at the ink inlet and extends into the shunt cavity through the damping cavity; the distances between the bottom end of the ink inlet pipe and each of the shunt ports are the same.

[0009] In this embodiment, by designing a fluctuation absorber in the circular diverter, an integrated damping and shunting design is achieved, solving the problem that during the ink inlet process of inkjet printing, due to the pressure fluctuation of the ink, this embodiment designs a circular damping and shunting integrated structure, which is beneficial to achieving the flow consistency of the ink at each shunt port during the damping and shunting process, further reducing the occurrence of uneven shunting, and effectively reducing the occurrence of uneven ink during inkjet printing.

[0010] In some embodiments, a mounting post is further included. The mounting post is arranged at the top of the main body, and a mounting channel communicating with the ink inlet is formed in the mounting post for the ink inlet pipe to pass through.

[0011] In some embodiments, a first sealing portion and a second sealing portion are further included. The first sealing portion is arranged between the fluctuation absorber and the main body, and the second sealing portion is arranged between the fluctuation absorber and the mounting post to fluid-seal between the damping cavity and the shunt cavity.

[0012] In some embodiments, an air hole communicating with the damping cavity is formed in the main body.

[0013] In some embodiments, the extending end of the ink inlet pipe is close to the wall surface where the shunt port is located.

[0014] In some embodiments, the ink inlet pipe is detachably inserted into the ink inlet, and a positioning block is arranged on the ink inlet pipe; an embedding groove is formed on the inner wall of the ink inlet, and a third sealing member for contacting the ink inlet pipe is arranged in the embedding groove.

[0015] In a second aspect, the present application provides an ink path circulation system, including at least two cooperating ink liquid diverters as described above, wherein at least one of the ink liquid diverters is a supply ink and shunt device, and at least one ink liquid diverter is a return ink and shunt device, wherein:

[0016] The ink inlet of the supply ink and shunt device is connected to the supply end of an external ink supply component, and the multiple shunt ports of the supply ink and shunt device are connected to the supply ends of external ink using components;

[0017] The multiple shunt ports of the return ink and shunt device are connected to the return end of the external ink using component, and the ink inlet of the return ink and shunt device is connected to the return end of the external ink supply component.

[0018] In a third aspect, the present application provides a printing device, which includes an external ink supply component and an external ink using component, and further includes the ink liquid diverter as described above.

[0019] In a fourth aspect, the present application provides a printing production line, which includes the printing device as described above.

[0020] Based on the structure of the diverter itself, the structure of the diverter in the present application is designed to be circular, so that the distances between the respective diversion ports and the ink inlet are the same. Through the improvement of the structure, the printing uniformity is improved. Compared with the related art, where the flow path lengths of different diversion ports are different and the flow times are different, resulting in large differences in the ink pressure and flow rate provided to each printing nozzle from the diversion ports, the circular diverter in the present application is designed with multiple diversions distributed in a ring shape, and the axis of the ink inlet is located in the center of the area surrounded by the multiple diversion ports, such that the distances between the diversion ports and the ink inlet of the diverter at different positions are the same and the flow times are the same, which is conducive to making the attenuation degrees of the ink fluctuations at each diversion port during the inkjet printing process tend to be consistent. Therefore, the circular diverter in the present application has a better effect in terms of printing uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 Shows an overall schematic diagram of the ink liquid diverter in the present application;

[0023] Figure 2 Shows a cross-sectional view of the ink liquid diversion damper in the present application;

[0024] Figure 3 Shows an exploded schematic diagram of the ink liquid diverter damper in the present application;

[0025] Figure 4 Shows a schematic diagram of the bottom of the ink liquid diverter in the present application;

[0026] Figure 5 Shows the test principle diagrams of Example 1 and Comparative Example 1;

[0027] Figure 6 Is a flow box line graph of the diversion branches of the circular diverter obtained according to Experimental Example 1;

[0028] Figure 7 Is a flow box line graph of the diversion branches of the square diverter obtained according to Experimental Example 2.

[0029] Reference numerals: 1, main body; 11, top cover; 12, outer shell; 13, ink inlet; 14, accommodation cavity; 15, shunt port; 2, fluctuation absorber; 21, damping cavity; 22, shunt cavity; 23, first sealing portion; 24, second sealing portion; 25, air hole; 3, mounting post; 4, ink inlet pipe; 41, positioning block; 42, third seal; 51, ink supply diaphragm pump; 52, ink return diaphragm pump; 53, damper; 54, heating rod; 55, temperature sensor; 56, ink supply pressure gauge; 57, ink supply diverter; 58, ink return diverter; 59, ink return pressure gauge. Detailed implementation

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] It should be noted that all the directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement conditions, etc. of each component in a specific posture. If this specific posture changes, the directional indication will also change accordingly. In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the descriptions such as "first" and "second" in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on what can be achieved by those of ordinary skill in the art. When the combination of the technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0032] The following describes the present application with reference to the accompanying drawings and specific embodiments:

[0033] A UV printing device is a printing device that achieves fast and high-quality printing through ultraviolet curing technology. The print head ejects tiny ink droplets according to image data, and these ink droplets land on the surface of the printing medium. A UV lamp installed near the print head emits ultraviolet light, causing a chemical reaction in the photosensitizer in the ink, which quickly cures into a solid ink layer, achieving the effect of drying immediately after printing.

[0034] In the field of battery production, the surface of the battery generally needs to be coated with a PET blue film. Therefore, the battery inkjet UV printing technology is adopted in this application to spray the liquid ink of the blue film material on the surface of the battery to form a battery blue film. During the spraying process, multiple nozzles generally work simultaneously to form a continuous and flat blue film on the surface of the battery. In related technologies, an ink splitter is often used to split the ink. Regarding this type of inkjet printing technology, first, in inkjet printing, there is an air layer in the ink splitter, resulting in certain fluctuations in the ink; second, due to the ink flow during the ink replenishment process, the degree of liquid fluctuation will be aggravated; third, in the ink supply technology, the ink is often pumped into the splitter by means of a pumping device. Due to the pumping impact force, the fluctuation of the ink entering the accommodation cavity of the splitter will be further aggravated. At the same time, the splitters on the market are often rectangular structures. The distances between the split ports and the ink inlet of the splitter at different positions are different, that is, the flow path lengths from the ink inlet to each split port are different during the splitting process. Due to the different flow path lengths and different flow times, the fluctuation amplitude of the ink will be attenuated to varying degrees at different split ports, resulting in large differences in the ink pressure and flow rate provided to each print head from the split ports, thus leading to uneven printing effects and poor consistency among the nozzles.

[0035] Therefore, the ink splitter, ink path circulation system, printing device, and printing production line provided in this application can at least solve the technical problem of uneven ink during inkjet printing to a certain extent. At the same time, the ink splitter, ink path circulation system, printing device, and printing production line provided in this application can also be applied to the fields of film spraying, PCB boards and internal circuit diagrams, 3D printing, printing of industrial materials such as circuit boards, electronic components, and mechanical parts, or other fields such as interior decoration.

[0036] In the first aspect, an ink splitter according to an embodiment of the present application is referred to Figure 1 Figure 4 , a main body member 1, a hollow accommodation cavity 14 is formed in the main body member 1, an ink inlet 13 and a plurality of split ports 15 communicating with the accommodation cavity 14 are formed on the main body member 1, the plurality of split ports 15 are annularly distributed, and the axis of the ink inlet 13 is located at the center of the area surrounded by the plurality of split ports 15, so that the distances between the ink inlet 13 and each split port 15 are the same.

[0037] In the embodiment of the present application, starting from the structure of the flow divider itself, the structure of the flow divider is designed to be circular, so that the distances between the respective flow dividing ports 15 and the ink inlet port 13 are the same, and the printing uniformity is improved through the structural improvement. Specifically, in the embodiment of the present application, the flow divider is designed as a circular structure. Correspondingly, the accommodation cavity 14 is set as a circular cavity, that is, a plurality of flow dividing ports 15 are annularly distributed, and the axis of the ink inlet port 13 is located at the center of the area surrounded by the plurality of flow dividing ports 15, so that the distances between the flow dividing ports 15 at different positions of the flow divider and the ink inlet port 13 of the flow divider are the same, and the flow times of the ink flowing from the ink inlet port 13 to the flow dividing ports 15 at different positions are the same, which is beneficial to making the attenuation degrees of the ink fluctuation amplitudes at the respective flow dividing ports 15 tend to be consistent during the inkjet printing process. Therefore, this circular flow divider improves the consistency of the ink flow rate and fluctuation at each flow dividing port 15, thereby improving the spraying and printing consistency at each position.

[0038] Compared with the related art in which the flow path lengths of different flow dividing ports are different and the flow times are different, resulting in large differences in the ink pressures and flow rates provided to each printing nozzle from the flow dividing ports, the circular flow divider of the present application has a better effect in terms of printing uniformity. In addition, this circular flow divider also has the following advantages: compared with the traditional rectangular flow divider, the circular flow divider of the present application can achieve the equal-distance flow dividing technology for multiple flow dividing ports such as one-to-eight and one-to-ten while taking into account the equal-distance flow dividing ports, further improving the printing efficiency.

[0039] Referring to Figure 2 Figure 3 , in some embodiments, it further includes a fluctuation absorber 2 and an ink inlet pipe 4. Along the ink conveying direction, the fluctuation absorber 2 seals and divides the accommodation cavity 14 into a damping cavity 21 and a flow dividing cavity 22; the ink inlet pipe 4 penetrates through the main body part 1 at the ink inlet port 13 and extends into the flow dividing cavity 22 through the damping cavity 21; the distances from the bottom end of the ink inlet pipe 4 to the respective flow dividing ports 15 are the same.

[0040] Among them, a hollow accommodation cavity 14 is provided in the main body part 1. The accommodation cavity 14 includes a damping cavity 21 and a flow dividing cavity 22. The junction of the damping cavity 21 and the flow dividing cavity 22 is sealed and divided by the fluctuation absorber 2. An ink inlet port 13 and a plurality of flow dividing ports 15 communicating with the flow dividing cavity 22 are provided on the main body part 1. The plurality of flow dividing ports 15 are annularly distributed, and the axis of the ink inlet port 13 is located at the center of the area surrounded by the plurality of flow dividing ports 15. Specifically, the main body part 1 includes a top cover 11 and an outer shell 12. Bolt holes are provided at the edge of the top cover 11, and the top cover 11 is fixed to the outer shell 12 by bolts to form a sealed accommodation cavity 14. In this embodiment, the damping cavity 21 can be provided on the top cover 11. The fluctuation absorber 2 forms the damping cavity 21 with the top cover 11 and forms the flow dividing cavity 22 with the outer shell 12. The plurality of flow dividing ports 15 are provided on the outer shell 12 and communicate with the flow dividing cavity 22. Each flow dividing port 15 is provided with a connector of the same model, which is respectively used to connect with different nozzles or other external ink-using components.

[0041] Exemplarily, during the ink replenishment process of inkjet printing, when the ink delivery direction in the diverter is from top to bottom, as Figure 2 shown, a damping chamber 21 is formed between the fluctuation absorber 2 and the top of the main body 1, and a diversion chamber 22 is formed between the fluctuation absorber 2 and the bottom of the main body 1. Among them, the ink inlet 13 is opened on the main body 1. In some specific embodiments, the ink inlet 13 can be provided on the top cover 11, and the ink inlet pipe 4 is provided at the ink inlet 13 and one end passes through the top cover 11, the damping chamber 21 and the fluctuation absorber 2 and then extends into the diversion chamber 22. In other embodiments, the ink inlet 13 can also be opened on the side wall of the outer shell 12 and communicated with the diversion chamber 22. The ink inlet pipe 4 bends to a vertical state after extending from the ink inlet 13, so as to extend into the diversion chamber 22. The bottom end of the ink inlet pipe 4 extends into the diversion chamber 22, and the distances between each diversion port 15 and the bottom end of the ink inlet pipe 4 are the same.

[0042] The ink is transported to the diversion chamber 22 through the ink inlet pipe 4 at the ink inlet 13 and is output to different print heads through the multiple diversion ports 15 of the diversion chamber 22. When the ink has a pressure fluctuation during the transportation process, the pressure fluctuation acts on the ink in the diversion chamber 22 through the ink in the diversion chamber 22, and then the pressure fluctuation is transmitted to the fluctuation absorber 2. The pressure fluctuation is weakened and absorbed by the fluctuation absorber 2 and the damping chamber 21, so as to reduce the amplitude of the pressure fluctuation in the diversion chamber 22.

[0043] In this embodiment, by designing a fluctuation absorber in the circular diverter, the damping and diversion are integrated, that is, an integrated circular damping and diversion structure is designed. During printing, the ink is transported to the diversion chamber through the ink inlet pipe at the ink inlet, and is output to different print heads through the multiple diversion ports of the diversion chamber. When the ink has a pressure fluctuation during the transportation process, the pressure fluctuation acts on the ink in the diversion chamber through the ink in the diversion chamber, and then the pressure fluctuation is transmitted to the fluctuation absorber. The pressure fluctuation is weakened and absorbed by the fluctuation absorber and the damping chamber, so as to reduce the amplitude of the pressure fluctuation in the diversion chamber, and further reduce the influence of the pressure fluctuation of the ink during ink inlet on each diversion port. And, since the diversion ports are annularly distributed and the distances from each diversion port to the axis where the ink inlet is located are the same, even if the ink has a pressure fluctuation during ink inlet, due to the same distance between the ink inlet and each diversion port, the fluctuation attenuation time of each diverted ink is the same, further reducing the occurrence of uneven diversion and effectively reducing the occurrence of uneven ink during inkjet printing.

[0044] In some specific embodiments, referring to Figure 2 Figure 3, the main body 1 is cylindrical, and the cross-section of the accommodating cavity 14 is circular. In this embodiment, the diameter of the accommodating cavity 14 can be 100 mm. The ink inlet 13 is opened at the central position of the main body 1 along the axial direction of the accommodating cavity 14. A plurality of shunt ports 15 are opened on the bottom wall of the shunt cavity 22. The plurality of shunt ports 15 are surrounded in a circle and are annularly distributed. Specifically, the plurality of shunt ports 15 are distributed along a circle with a diameter of 64 mm. The axis of the ink inlet 13 is located at the center of the area surrounded by the plurality of shunt ports 15, that is, the plurality of shunt ports 15 are evenly spaced with the axis of the ink inlet 13 as the center, so that the ink enters the shunt cavity 22 and is evenly shunted to each shunt port 15. Since the distance from each shunt port 15 to the axis where the ink inlet 13 is located is the same, the resistance of the ink from entering the shunt port 15 and being shunted to each shunt port 15 is the same, and there will be no pressure drop as the ink is output, so that the flow rates of each shunt port 15 are the same; Secondly, since the plurality of shunt ports 15 are annularly distributed, when the ink input from the ink inlet 13 generates a pressure fluctuation, the influence on each shunt port 15 is the same. For example, when the ink inlet pressure suddenly increases, the impact on each shunt port 15 is the same, and the influence of the turbulent flow effect of the ink on each shunt port 15 is also the same, further reducing the occurrence of uneven shunting. In this embodiment, the number of shunt ports can be 8, and according to the actual situation, the number of shunt ports can be set to other numbers.

[0045] In some specific embodiments, a buffer member is provided in the area surrounded by the plurality of shunt ports 15, which is used to absorb the impact force of the ink entering the shunt cavity 22, and at the same time further improve the effect of uniform shunting.

[0046] In some embodiments, an installation post 3 is provided on the top of the main body 1. The installation post 3 is arranged on the top of the main body 1. An installation channel communicating with the ink inlet 13 is provided in the installation post 3 for the ink inlet pipe 4 to pass through. The installation post 3 and the ink inlet 13 are coaxially arranged. In this embodiment, the installation post 3 is arranged on the side wall of the top cover 11 facing the outer shell 12, and the length of the installation post 3 is greater than the thickness of the damping cavity 21, so that the installation post 3 passes through the damping cavity 21 and enters the shunt cavity 22. An installation channel communicating with the ink inlet 13 is provided in the installation post 3 for the ink inlet pipe 4 to pass through; the fluctuation absorption member 2 is arranged between the installation post 3 and the main body 1 to form a damping cavity 21.

[0047] In this embodiment, the fluctuation absorber 2 can be an annular elastic sheet. The fluctuation absorber 2 is sleeved on the mounting post 3 and its edge is hermetically connected to the top cover 11, thereby forming a fluid-sealed damping cavity 21 between it and the top cover 11. The ink inlet pipe 4 extends into the flow distribution cavity 22 through the ink inlet 13 and the mounting post 3. By providing a mounting channel in the mounting post 3 for the ink inlet pipe 4 to extend into, the sealing between the damping cavity 21 and the flow distribution cavity 22 is ensured. During the working process, since the ink is flowing in real time, the pressure in the flow distribution cavity 22 cannot remain stable. Therefore, when the pressure of the ink fluctuates, the position closer to the ink inlet 13 is more affected by the pressure fluctuation. Since multiple flow distribution ports 15 are annularly distributed, the distances between the annularly arranged fluctuation absorber 2 and each flow distribution port 15 are the same, and the pressure absorption effects on the multiple flow distribution ports 15 are also the same, achieving pressure balance between the multiple flow distribution ports 15. Even when the pressure of the ink fluctuates, the influence of the turbulent flow effect of the ink on each flow distribution port 15 is the same, and the pressure absorption effect of the fluctuation absorber 2 on each flow distribution port 15 is also the same. Furthermore, the ink flow distribution effects between the respective flow distribution ports 15 remain the same, further reducing the influence of pressure fluctuation on the flow distribution effect.

[0048] Specifically, the bottom of the mounting post 3 is provided with a mounting section, and an external thread is provided on the outer wall of the mounting section. The fluctuation absorber 2 is sleeved on the mounting section and is fixed to the mounting post 3 by fixing bolts, thereby hermetically and fixedly connecting it to the mounting post 3. In other embodiments, other methods such as bonding can also be used.

[0049] In this embodiment, the fluctuation absorber 2 is made of an elastic material, such as rubber material, etc., so that the fluctuation absorber 2 has a relatively sensitive deformation effect. The thickness of the fluctuation absorber 2 can be determined according to actual application conditions. The smaller the thickness, the higher the sensitivity to pressure changes, but the lower the pressure-bearing upper limit. In other embodiments, the material of the fluctuation absorber 2 can be determined according to actual situations. For example, when the ink pumping volume is large but the size of the main body 1 is limited, a material with greater elasticity can be used to provide a greater fluctuation absorption effect. In this embodiment, the cross-sections of the main body 1 and the accommodation cavity 14 are circular, so the fluctuation absorber 2 is an annular member. In other embodiments, when the cross-sections of the main body 1 and the accommodation cavity 14 are of other shapes, the fluctuation absorber 2 can be adaptively determined to be of other shapes.

[0050] In some embodiments, referring to Figure 2 and Figure 3, the ink liquid diverter further includes a first sealing portion 23 and a second sealing portion 24. The first sealing portion 23 is disposed between the fluctuation absorber 2 and the main body member 1, and the second sealing portion 24 is disposed between the fluctuation absorber 2 and the mounting post 3 to fluid-seal between the damping chamber 21 and the diversion chamber 22. In this embodiment, the first sealing portion 23 can be a sealing ring made of an elastic material. Specifically, an installation groove is formed at the edge of the outer shell 12. The fluctuation absorber 2 is clamped in the installation groove by the top cover 11. A sealing groove is formed in the installation groove, and the first sealing portion 23 is disposed in the sealing groove. The fluctuation absorber 2 covers and clamps the first sealing portion 23 in the sealing groove, so as to seal and separate the fluctuation absorber 2 from the diversion chamber 22 through the first sealing portion 23; the second sealing portion 24 can be a sealing gasket, and the second sealing portion 24 is disposed between the fluctuation absorber 2 and the mounting bolt at the bottom of the mounting post 3. The second sealing portion 24 is tightly connected to the fluctuation absorber 2 through the mounting bolt, thereby improving the sealing effect between the fluctuation absorber 2 and the mounting post 3.

[0051] In some embodiments, an air hole 25 communicating with the damping chamber 21 is formed on the main body member 1. Specifically, the air hole 25 is formed on the top cover 11. When the pressure in the diversion chamber 22 changes, the fluctuation absorber 2 absorbs the pressure fluctuation through its own deformation, and the gas in the damping chamber 21 can enter or exit through the air hole 25, so that the force generated by the pressure fluctuation acts more on the fluctuation absorber 2, improving the elastic utilization rate of the fluctuation absorber 2. In this embodiment, one air hole 25 is formed. In other embodiments, according to actual needs, multiple air holes 25 can be formed to improve the pressure relief effect, or when an avoidance design needs to be made according to actual conditions, the air hole 25 can be formed on the side wall.

[0052] In some embodiments, the extending end of the ink inlet pipe 4 is close to the wall surface where the diversion port 15 is located. After the ink inlet pipe 4 extends into the diversion chamber 22, it extends to be close to the bottom wall, so that there is a certain gap between the ink outlet end of the ink inlet pipe 4 and the bottom wall of the diversion chamber 22, reducing the flow distance of the ink liquid after entering the diversion chamber 22 and reducing the impact of the ink liquid on the liquid level in the diversion chamber 22, thereby improving the stability of the ink liquid in the diversion chamber 22.

[0053] In some embodiments, the ink inlet pipe 4 is detachably inserted through the ink inlet 13. A positioning block 41 is provided on the ink inlet pipe 4. After one end of the ink inlet pipe 4 is inserted through the ink inlet 13, the positioning block 41 is clamped on the top of the main body member 1. The length between the positioning block 41 and the extending end of the ink inlet pipe 4 is less than the height of the accommodating chamber 14, so that the extending end of the ink inlet pipe 4 is close to the wall surface where the diversion port 15 is located and there is a certain gap between it and the bottom wall of the diversion chamber 22. By providing the positioning block 41, the ink inlet pipe 4 is detachably arranged, making the installation of the whole structure more convenient. In other embodiments, the ink inlet pipe 4 can also be integrally arranged on the main body member 1 directly, or fixedly connected by bolts or the like.

[0054] In some embodiments, an embedding groove is formed on the inner wall of the ink inlet 13, and a third seal 42 for contacting the ink inlet pipe 4 is arranged in the embedding groove. In this embodiment, the third seal 42 can be a sealing rubber sleeve made of elastic material. The third seal 42 is fixedly embedded in the embedding groove and has a through structure. The ink inlet pipe 4 is in interference fit with the through hole of the third seal 42, so that the ink inlet pipe 4 is tightly connected with the third seal 42 after being inserted, thereby improving the stability and sealing performance of the whole device.

[0055] In other embodiments, the third seal 42 can be arranged on the ink inlet pipe 4 to enable a sealing connection between the third seal 42 and the main body 1, or a separate third seal 42 can be arranged outside the main body 1 to seal the connection between the ink inlet pipe 4 and the main body 1.

[0056] In a second aspect, an embodiment of the present application provides an ink path circulation system, which includes at least two cooperating ink liquid distributors as provided in the first embodiment. At least one ink liquid distributor is a supply ink distribution device, and at least one ink liquid distributor is a return ink distribution device. Among them, the ink inlet 13 of the supply ink distribution device is connected to the supply end of an external ink supply component, and multiple distribution ports 15 are connected to the supply ends of external ink-using components; the multiple distribution ports 15 of the return ink distribution device are connected to the return ends of external ink-using components, and the ink inlet 13 is connected to the return end of the external ink supply component. The distribution ports 15 of the supply ink distribution device correspond to the distribution ports 15 of the return ink distribution device one by one. The ink liquid is distributed by the supply ink distribution device and then flows back through the distribution ports 15 of the return ink distribution device to complete the ink liquid circulation.

[0057] In a third aspect, an embodiment of the present application provides a printing device. In this embodiment, the printing device can be a UV printing device for battery blue film, which includes an external ink supply component and an external ink-using component, and also includes the ink liquid distributor as described in the first aspect above, or the ink path circulation system as described in the second aspect above.

[0058] In a fourth aspect, the present application provides a printing production line, which includes the printing device provided in the third aspect above.

[0059] Embodiment 1: An ink liquid system includes a supply ink distributor 57 and a return ink distributor 58. The schematic diagram of this ink liquid system is as Figure 5As shown, the diversion ports of the ink supply diverter 57 correspond one by one to the diversion ports of the ink return diverter 58, and each diversion port of the ink supply diverter 57 is connected to the corresponding diversion port of the ink return diverter 58 through a connecting pipe, forming each diversion branch. The ink is pumped into the damper 53 by the ink supply diaphragm pump 51 and heated by the heating rod 54, and then transported into the ink supply diverter 57. After being diverted by the ink supply diverter 57, the heated ink flows to the ink return diverter 58 through each diversion branch. At the same time, the ink temperature is detected by the temperature sensor 55, and the ink pressures in the ink supply diverter 57 and the ink return diverter are detected by the ink supply pressure gauge 56 and the ink return pressure gauge 59.

[0060] Among them, both the ink supply diverter and the ink return diverter adopt the circular diverter provided in this application.

[0061] Comparative Example 1: Different from Example 1, the circular diverter provided in this application is replaced with a traditional rectangular diverter.

[0062] Experimental Example 1: In the experimental example, in order to exclude the influence of the fluctuation absorber test, no fluctuation absorber is provided in the diverter of the ink system in this embodiment, and the damper 53 is independently provided. To avoid the influence of the exhaust valve on the test result of the ink diversion effect of the diverter, during the experiment, the exhaust valve of the diverter is in the closed state.

[0063] Based on the ink system provided in Example 1, experimental tests are carried out respectively under three different ink supply pressures of low flow rate, medium flow rate, and high flow rate. In each group of tests, the detected temperature is set to 40 °C, and the meniscus pressure is -2.5 mbar.

[0064] Among them, under the low-flow ink supply condition, the pressure difference between the ink supply diverter 57 and the ink return diverter 58 is set to 95.5 mbar, the duty cycle of the ink supply diaphragm pump 51 is 30.80%, and the duty cycle of the ink return diaphragm pump 52 is 28.60%.

[0065] Under the medium-flow ink supply condition, the pressure difference between the ink supply diverter 57 and the ink return diverter 58 is set to 145.3 mbar, the duty cycle of the ink supply diaphragm pump 51 is 49.10%, and the duty cycle of the ink return diaphragm pump 52 is 46.80%.

[0066] Under the high-flow ink supply condition, the pressure difference between the ink supply diverter 57 and the ink return diverter 58 is set to 190.9 mbar, the duty cycle of the ink supply diaphragm pump 51 is 66.60%, and the duty cycle of the ink return diaphragm pump 52 is 61.80%.

[0067] In Experimental Example 1, at each ink supply pressure, four shunt branches in the ink system were selected, and at the corresponding shunt ports of the ink supply diverter 57, the flow rate values of the four shunt branches were sequentially detected using the same flowmeter. This was repeated, and the flow rate values of each shunt branch under each ink supply pressure were detected 10 times respectively, obtaining the flow rate test data of each shunt branch of the circular diverter in Experimental Example 1 as shown in Tables 1 to 3 below.

[0068] Table 1 Comparison Table of Ink Flow Rates in Shunt Branches of Circular Diverter under Low-Flow Ink Supply Condition

[0069]

[0070] Table 2 Comparison Table of Ink Flow Rates in Shunt Branches of Circular Diverter under Medium-Flow Ink Supply Condition

[0071]

[0072] Table 3 Comparison Table of Ink Flow Rates in Shunt Branches of Circular Diverter under High-Flow Ink Supply Condition

[0073]

[0074] Based on Tables 1 to 3, box plots of the flow rates of each shunt branch of the circular diverter were drawn, as Figure 6 shown.

[0075] Experimental Example 2: Referring to Experimental Example 1, the flow rates of each shunt branch of the square diverter in Comparative Example 1 were tested, obtaining the test data as shown in Tables 4 to 6 below.

[0076] Among them, different from Experimental Example 1, under the low-flow ink supply condition, the pressure difference between the ink supply diverter 57 and the ink return diverter 58 was set to 41.5 mbar, the duty cycle of the ink supply diaphragm pump 51 was 27.90%, and the duty cycle of the ink return diaphragm pump 52 was 26.50%.

[0077] Under the medium-flow ink supply condition, the pressure difference between the ink supply diverter 57 and the ink return diverter 58 was set to 71.6 mbar, the duty cycle of the ink supply diaphragm pump 51 was 51.90%, and the duty cycle of the ink return diaphragm pump 52 was 48.60%.

[0078] Under the high-flow ink supply condition, the pressure difference between the ink supply diverter 57 and the ink return diverter 58 was set to 90.5 mbar, the duty cycle of the ink supply diaphragm pump 51 was 69.96%, and the duty cycle of the ink return diaphragm pump 52 was 64.48%.

[0079] Table 4 Comparison Table of Ink Flow Rates in Shunt Branches of Square Diverter under Low-Flow Ink Supply Condition

[0080]

[0081] Table 5 Comparison Table of Ink Flow Rates in the Shunt Branches of the Square Shunt under the Condition of Flow Supply Ink

[0082]

[0083] Table 6 Comparison Table of Ink Flow Rates in the Shunt Branches of the Square Shunt under the Condition of High-Flow Supply Ink

[0084]

[0085] Based on Tables 4 to 6, box plots of the flow rates of each shunt branch of the square shunt are drawn, as Figure 7 shown.

[0086] From Figure 6 and Figure 7 the box plots shown, it can be seen that the mean values and distributions of the flow rates of each shunt branch of the rectangular shunt are fluctuating, indicating that the shunt uniformity of the rectangular shunt is insufficient. While the mean values and distributions of the flow rates of each shunt branch of the circular shunt are relatively close, indicating that the shunt uniformity of the circular shunt is better, superior to that of the rectangular shunt. Therefore, through the improvement of the shunt structure of the circular shunt in this application, better inkjet printing effects can be achieved.

[0087] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

Claims

1. An ink liquid splitter, characterized in that, Comprising: A main body member (1), a hollow accommodation cavity (14) is formed inside the main body member (1), an ink inlet (13) and a plurality of diversion ports (15) communicating with the accommodation cavity (14) are formed on the main body member (1), the plurality of diversion ports (15) are annularly distributed, and the axis of the ink inlet (13) is located at the center of the area surrounded by the plurality of diversion ports (15), so that the distances between the ink inlet (13) and each of the diversion ports (15) are the same.

2. The ink diverting device according to claim 1, wherein It further includes a fluctuation absorber (2) and an ink inlet pipe (4). Along the ink conveying direction, the fluctuation absorber (2) seals and divides the accommodation cavity (14) into a damping cavity (21) and a diversion cavity (22); the ink inlet pipe (4) penetrates into the main body member (1) at the ink inlet (13) and extends into the diversion cavity (22) through the damping cavity (21); the distances between the bottom end of the ink inlet pipe (4) and each of the diversion ports (15) are the same.

3. The ink diverting device according to claim 2, wherein It further includes a mounting post (3), the mounting post (3) is arranged on the top of the main body member (1), and a mounting channel communicating with the ink inlet (13) is formed inside the mounting post (3) for the ink inlet pipe (4) to pass through.

4. The ink flow splitter according to claim 3, characterized in that, It further includes: A first sealing portion (23) and a second sealing portion (24), the first sealing portion (23) is arranged between the fluctuation absorber (2) and the main body member (1), and the second sealing portion (24) is arranged between the fluctuation absorber (2) and the mounting post (3), so as to provide fluid sealing between the damping cavity (21) and the diversion cavity (22).

5. The ink diverting device according to claim 2, wherein An air hole (25) communicating with the damping cavity (21) is formed on the main body member (1).

6. The ink diverting device according to claim 2, wherein The extending end of the ink inlet pipe (4) is close to the wall surface where the diversion ports (15) are located.

7. The ink diverting device according to claim 2, wherein The ink inlet pipe (4) is detachably inserted into the ink inlet (13), and a positioning block (41) is arranged on the ink inlet pipe (4); an embedding groove is formed on the inner wall of the ink inlet (13), and a third sealing member (42) for contacting the ink inlet pipe (4) is arranged in the embedding groove.

8. An ink circuit recycling system, characterized in that, Comprising at least two mutually cooperating ink distributors as described in any one of claims 1-7, wherein at least one of the ink distributors is a supply ink distribution device, and at least another ink distributor is a return ink distribution device, wherein: The ink inlet (13) of the supply ink distribution device is connected to the supply end of an external ink supply assembly, and the plurality of diversion ports (15) of the supply ink distribution device are connected to the supply end of an external ink using assembly; The plurality of diversion ports (15) of the return ink distribution device are connected to the return end of the external ink using assembly, and the ink inlet (13) of the return ink distribution device is connected to the return end of the external ink supply assembly.

9. A printing device, characterized in that, Comprising an external ink supply assembly and an external ink using assembly, and further comprising an ink distributor as described in any one of claims 1-7.

10. A printing production line, characterized in that, Comprising the printing device as claimed in claim 9.

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