Printing ink recovery device

Abstract

The ink recovery device comprises a tank body, an ink inlet, an ink outlet, a grading filter screen structure and a suction structure, the tank body is placed on the ground, the ink inlet and the ink outlet are formed in the top end of the tank body side by side so that ink can enter and exit, and the grading filter screen structure is located in the tank body and divides the tank body into a filter cavity and a recovery cavity in the height direction; printing ink containing impurities enters the tank body through the ink inlet, the impurities are filtered step by step through the grading filter screen in the first direction, finally pure printing ink is generated at the bottom of the tank body, the suction structure penetrates through the ink outlet and abuts against the bottom end of the tank body, and the pure printing ink in the recovery cavity can be further collected and discharged. According to the design, through the combination of graded filtering, cavity separation and a suction structure, the ink recycling process is optimized, filtering and recycling of the ink containing impurities are effectively achieved, the purity of the recycled ink is guaranteed, ink waste is reduced, and the resource utilization rate is increased.

Description

Technical Field

[0001] The present application relates to the field of recovery devices, and in particular to an ink recovery device. Background Art

[0002] Ink printing is a widely used and time-honored process, and ink-printed items are inextricably linked to our daily lives. Ink printing on packaging is one of the most demanding applications, especially for cigarette packaging, which demands even higher levels of process technology. Due to the meticulous attention to detail required in the printing process, such as surface finish, pattern, and texture, dust and impurities must be minimized during the printing process to achieve optimal quality. Conventional printing technology utilizes roller-printed printing equipment, which injects ink during the printing process. Excess ink can flow into a recycling container during the printing process, and this recycled ink often fails to meet the cleanliness requirements for reuse, often contaminated with paper debris, dust, and other debris. Direct reuse of this ink can lead to ink contamination and various defects in the printed design.

[0003] Therefore, it is necessary to provide an ink recovery device that can recycle ink containing impurities to solve the problems of increased costs and environmental pollution caused by the inability to reuse ink containing impurities. Utility Model Content

[0004] In view of this, it is necessary to provide an ink recovery device that can recycle ink containing impurities to solve the above problems.

[0005] An embodiment of the present application provides an ink recovery device, comprising:

[0006] The tank body is placed on the ground, and the top of the tank body includes an oil inlet and an oil outlet arranged side by side;

[0007] A graded filter structure, viewed along the height direction of the tank body, facing the oil inlet and disposed within the tank body;

[0008] The height direction of the tank body is a first direction, the graded filter structure partitions the tank body along the first direction to form a filter cavity and a recovery cavity, the oil inlet is connected to the filter cavity, and the oil outlet is connected to the recovery cavity;

[0009] a suction structure, passing through the oil outlet in the first direction and abutting against the bottom end of the tank body;

[0010] The ink containing impurities flows into the tank body along the oil inlet and is filtered through the graded filter structure along the first direction to generate pure ink that flows into the bottom end of the tank body.

[0011] In at least one embodiment of the present application, the graded filter screen structure includes a graded filter screen and a partition plate connected to the graded filter screen;

[0012] When viewed along the first vertical direction, one end of the partition plate passes through the grading filter screen and abuts against the bottom end of the tank body to form the filtration cavity and the recovery cavity, and the other end is connected to the top end of the tank body;

[0013] The grading filter is a multi-layer filter structure arranged in parallel along the first direction. When viewed perpendicularly to the first direction, one end of the grading filter is embedded in the filter cavity, and the other end is connected to the partition plate.

[0014] In at least one embodiment of the present application, the grading filter includes a first filter. When viewed perpendicular to the first direction, the first filter is arranged near the top of the tank body, and one end of the first filter is embedded in the filter cavity, and the other end is connected to the partition plate.

[0015] In at least one embodiment of the present application, the grading filter further includes a second filter;

[0016] When viewed perpendicularly to the first direction, the second filter screen is disposed on a side of the first filter screen that is away from the top of the tank body, and one end of the second filter screen is embedded in the filter cavity, and the other end is connected to the partition plate;

[0017] Observed along the first direction, the inner diameter of the filter holes of the first filter screen is larger than the inner diameter of the second filter screen.

[0018] In at least one embodiment of the present application, the grading filter further includes a third filter;

[0019] When viewed perpendicularly to the first direction, the third filter screen is disposed on a side of the second filter screen that faces away from the first filter screen, and one end of the third filter screen is embedded in the filter cavity, and the other end is connected to the partition plate;

[0020] Observed along the first direction, the inner diameter of the filter holes of the second filter screen is larger than the inner diameter of the third filter screen.

[0021] In at least one embodiment of the present application, the grading filter further includes a fourth filter;

[0022] When viewed perpendicularly to the first direction, the fourth filter screen is provided at the bottom end of the tank body, the fourth filter screen is fixed inside the tank body, and one end of the partition plate is fixed to the top end of the tank body, and the other end is fixed to the fourth filter screen;

[0023] Observed along the first direction, the inner diameter of the filter holes of the third filter screen is larger than the inner diameter of the fourth filter screen.

[0024] In at least one embodiment of the present application, the suction structure includes an oil pipe and a drive ring structure;

[0025] Observed along the first direction perpendicular to the oil pipe, the oil pipe passes through the oil outlet and is connected to the drive ring structure. The drive ring abuts against the fourth filter screen and contacts the pure ink. The drive ring is connected to the oil pipe.

[0026] In at least one embodiment of the present application, the drive ring structure includes a magnetic member. When viewed along the first direction perpendicular to the first direction, the magnetic member is connected between the drive ring structure and the fourth filter screen, and the magnetic member is magnetically connected to the fourth filter screen.

[0027] In at least one embodiment of the present application, the fourth filter screen is made of stainless steel.

[0028] In at least one embodiment of the present application, the drive ring structure further includes a heating ring. When viewed along the first direction, the heating ring and the magnetic member are arranged side by side and the heating ring contacts the pure ink. The drive ring structure can drive the heating ring to heat the pure ink.

[0029] The ink recovery device provided above effectively realizes the filtration and recycling of ink containing impurities through a specific structural design. The tank body is set on the ground, and the oil inlet and oil outlet at the top are arranged side by side to facilitate the entry and exit of ink. The graded filter screen structure is set in the tank body, partitioning the tank body along the height direction to form a filter chamber and a recovery chamber. The ink containing impurities enters the tank body through the oil inlet and passes through the graded filter screen along the first direction, filtering the impurities step by step, and finally generating pure ink at the bottom of the tank body. The suction structure passes through the oil outlet and abuts the bottom end of the tank body, which can further collect and discharge the pure ink in the recovery chamber. This design optimizes the ink recovery process through the combination of graded filtration, cavity separation and suction structure, effectively realizes the recycling of ink containing impurities, ensures the purity of the recovered ink, thereby reducing ink waste and improving resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is an axial view of an ink recovery device;

[0031] Figure 2 for Figure 1 Cross-sectional view at CC;

[0032] Figure 3 It is a left side view of an ink recovery device;

[0033] Figure 4 for Figure 3 Cross-sectional view at BB;

[0034] Figure 5 is a top view of an ink recovery device;

[0035] Figure 6 for Figure 5 Cross-sectional view at AA.

[0036] Description of main component symbols

[0037] 1. Tank body; 2. Oil inlet; 3. Oil outlet; 4. Graded filter structure; 5. Filter chamber; 6. Recovery chamber; 7. Suction structure; 8. Oil pipe; 9. Drive ring structure; 10. Partition plate; 11. First filter; 12. Second filter; 13. Third filter; 14. Fourth filter; 15. Magnetic part; 16. Heating ring; 17. Pure ink; 100. An ink recovery device. DETAILED DESCRIPTION

[0038] The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0039] It should be noted that when a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and similar expressions used herein are for illustrative purposes only.

[0040] An embodiment of the present application provides an ink recovery device, comprising:

[0041] The tank body is placed on the ground, and the top of the tank body includes an oil inlet and an oil outlet arranged side by side;

[0042] A graded filter structure, viewed along the height direction of the tank body, facing the oil inlet and disposed within the tank body;

[0043] The height direction of the tank body is a first direction, the graded filter structure partitions the tank body along the first direction to form a filter cavity and a recovery cavity, the oil inlet is connected to the filter cavity, and the oil outlet is connected to the recovery cavity;

[0044] a suction structure, passing through the oil outlet in the first direction and abutting against the bottom end of the tank body;

[0045] The ink containing impurities flows into the tank body along the oil inlet and is filtered through the graded filter structure along the first direction to generate pure ink that flows into the bottom end of the tank body.

[0046] The ink recovery device provided above effectively realizes the filtration and recycling of ink containing impurities through a specific structural design. The tank body is set on the ground, and the oil inlet and oil outlet at the top are arranged side by side to facilitate the entry and exit of ink. The graded filter screen structure is set in the tank body, partitioning the tank body along the height direction to form a filter chamber and a recovery chamber. The ink containing impurities enters the tank body through the oil inlet and passes through the graded filter screen along the first direction, filtering the impurities step by step, and finally generating pure ink at the bottom of the tank body. The suction structure passes through the oil outlet and abuts the bottom end of the tank body, which can further collect and discharge the pure ink in the recovery chamber. This design optimizes the ink recovery process through the combination of graded filtration, cavity separation and suction structure, effectively realizes the recycling of ink containing impurities, ensures the purity of the recovered ink, thereby reducing ink waste and improving resource utilization.

[0047] The following is combined with Figures 1-6 , some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0048] An embodiment of the present application provides an ink recovery device 100, comprising:

[0049] The tank body 1 is placed on the ground, and the top of the tank body 1 includes an oil inlet 2 and an oil outlet 3 arranged side by side;

[0050] a graded filter structure 4, viewed along the height direction of the tank body 1, facing the oil inlet 2 and disposed inside the tank body 1;

[0051] The height direction of the tank body 1 is a first direction, and the graded filter structure 4 partitions the tank body 1 along the first direction to form a filter chamber 5 and a recovery chamber 6. The oil inlet 2 is connected to the filter chamber 5, and the oil outlet 3 is connected to the recovery chamber 6.

[0052] a suction structure 7, passing through the oil outlet 3 in the first direction and abutting against the bottom end of the tank body 1;

[0053] The ink containing impurities flows into the tank body 1 along the oil inlet 2 and is filtered through the graded filter structure 4 along the first direction to generate pure ink 17 which flows into the bottom end of the tank body 1 .

[0054] Specifically, the ink recovery device comprises a tank body 1, an oil inlet 2, an oil outlet 3, a graded filter structure 4, and a suction structure 7. The tank body 1 is mounted on the ground, with the oil inlet 2 and outlet 3 positioned side by side at the top to facilitate ink injection and discharge. The graded filter structure 4 is located inside the tank body 1, directly opposite the oil inlet 2. It divides the structure into a filtration chamber 5 and a recovery chamber 6 along the height of the tank body 1, allowing the oil inlet 2 to directly connect to the filtration chamber 5, while the oil outlet 3 connects to the recovery chamber 6. This design effectively removes impurities through the graded filter, ensuring high ink purity. After entering the tank body 1, the impure ink is filtered through multiple layers of graded filter screens, resulting in pure ink 17 that flows into the bottom of the tank body 1. The suction structure 7 extracts the pure ink 17 to other equipment. This structural design significantly reduces the risk of ink contamination during use, avoiding pattern defects caused by the use of contaminated ink. Applications include the printing process for cigarette packaging paper, where it meets high requirements for printing quality and efficiency, ensuring the smoothness and fineness of the final product, thereby enhancing market competitiveness. This device not only improves the utilization rate of ink in industrial production, but also reduces costs, meets the goal of sustainable development, and helps reduce environmental pollution.

[0055] Furthermore, the grading filter structure 4 includes a grading filter and a partition plate 10 connected to the grading filter;

[0056] When viewed along the first vertical direction, one end of the partition plate 10 passes through the grading filter and abuts against the bottom end of the tank body 1 to form the filtration chamber 5 and the recovery chamber 6, and the other end is connected to the top end of the tank body 1;

[0057] The grading filter is a multi-layer filter structure arranged in parallel along the first direction. When viewed perpendicularly to the first direction, one end of the grading filter is embedded in the filter cavity 5 and the other end is connected to the partition plate 10.

[0058] Specifically, a graded filter structure 4 is defined, which includes a graded filter and a partition plate 10. One end of the partition plate 10 passes through the graded filter and abuts the bottom end of the tank body 1, and the other end is connected to the top end of the tank body 1. This design enhances the stability of the filtration in terms of physical structure, and forms a clear filter chamber 5 and a recovery chamber 6 through the partition plate 10. The graded filter provides multi-stage filtration with different filter pore inner diameters through a multi-layer arrangement, which can effectively remove impurities of different particle sizes. Specifically, the first layer of filter performs preliminary filtration on larger particles, and then the smaller particles are refined through the second layer of filter, thereby ensuring that the purity of the ink meets the use requirements. This design allows the functions of each layer of filter to complement each other, forming an efficient filtration system, which avoids printing defects caused by the mixing of impurities. Through this clearly layered filtration process, the ink can be fully purified before entering the next step, ensuring high-standard printing quality, while reducing the maintenance frequency of the equipment, extending the service life of the equipment, and providing economic benefits to users.

[0059] Furthermore, the grading filter includes a first filter 11 . When viewed perpendicular to the first direction, the first filter 11 is disposed near the top of the tank body 1 , and one end of the first filter 11 is embedded in the filter cavity 5 , and the other end is connected to the partition plate 10 .

[0060] Specifically, the graded filter screen specifically includes a first filter screen 11, which is arranged near the top of the tank body 1, and one end is embedded in the filter chamber 5, and the other end is connected to the partition plate 10. The first filter screen 11 plays a vital role in the entire ink recovery device. Its main function is to serve as a primary filter to effectively prevent larger particulate impurities from entering the downstream filter chamber 5. This structural design significantly improves the efficiency of the overall filtration system, ensures the purity of the ink, and lays a good foundation for the subsequent printing process. Through the precise design of the height and position of the first filter screen 11, it is ensured that it can work in an ideal state throughout the filtration process, thereby maximizing its function. The beneficial effect of this design is not only to improve the quality of the ink, but also to enhance the fineness and consistency of the printing, which can meet high-standard production requirements and avoid product quality degradation due to ink contamination.

[0061] Furthermore, the grading filter screen further includes a second filter screen 12;

[0062] Observed perpendicularly to the first direction, the second filter screen 12 is provided on the side of the first filter screen 11 away from the top of the tank body 1 , and one end of the second filter screen 12 is embedded in the filter cavity 5 , and the other end is connected to the partition plate 10 ;

[0063] Observed along the first direction, the inner diameter of the filter holes of the first filter screen 11 is larger than the inner diameter of the second filter screen 12 .

[0064] Specifically, the graded filter also includes a second filter 12, located on the side of the first filter 11 facing away from the top of the tank 1. One end of the second filter 12 is embedded in the filter cavity 5, and the other end is connected to the partition plate 10. The introduction of the second filter 12 enhances the multi-stage filtration effect. Through the ingenious design of the filter pore inner diameter, it can effectively capture small particles that the first filter 11 cannot filter. The combination of the two layers of filter forms a step-by-step filtration system from large to small, further improving the cleanliness of the ink. This structural design not only effectively removes paper debris, dust, and other impurities, but also ensures that the filtration effect of each filter layer is optimized, minimizing the impact on the final printing effect.

[0065] Furthermore, the grading filter screen further includes a third filter screen 13;

[0066] Observed along the first direction perpendicular to the first filter screen, the third filter screen 13 is provided on the side of the second filter screen 12 away from the first filter screen 11, and one end of the third filter screen 13 is embedded in the filter cavity 5, and the other end is connected to the partition plate 10;

[0067] Observed along the first direction, the inner diameter of the filter holes of the second filter screen 12 is larger than the inner diameter of the third filter screen 13 .

[0068] Specifically, the graded filter also includes a third filter 13, which is located on the side of the second filter 12 away from the first filter 11, with one end embedded in the filter cavity 5 and the other end connected to the partition plate 10. The introduction of the third filter 13 further enhances the hierarchy and effectiveness of the filtration system, and is capable of processing finer impurities that the second filter 12 fails to remove. The advantage of this design is that by setting filter screens with different inner diameters, a multi-level progressive filtration is formed, which not only improves the purity of the ink, but also ensures the fluidity and stability during subsequent use. Combined with the characteristics of the multi-layer filter screen, the effectiveness of the overall filtration system is greatly enhanced, and it can adapt to the recovery and purification needs of different types of inks.

[0069] Furthermore, the grading filter further includes a fourth filter 14;

[0070] Observed along the first direction perpendicular to the first direction, the fourth filter screen 14 is provided at the bottom end of the tank body 1, the fourth filter screen 14 is fixed in the tank body 1, and one end of the partition plate 10 is fixed to the top end of the tank body 1, and the other end is fixed on the fourth filter screen 14;

[0071] Observed along the first direction, the inner diameter of the filter holes of the third filter screen 13 is larger than the inner diameter of the fourth filter screen 14 .

[0072] Specifically, the graded filter also includes a fourth filter 14, which is fixed to the bottom end of the tank body 1, and one end of the partition plate 10 is fixed to the top end of the tank body 1, and the other end is fixed to the fourth filter 14. This design ensures the stability and reliability of the entire filtration structure, so that it can withstand a certain amount of pressure and impact during the filtration process, while preventing the filter from being displaced or damaged due to eddy currents or vibrations during the operation of the ink. The introduction of the fourth filter 14 not only provides a last line of defense for the ink, but also ensures the purity of the final ink, avoiding the influence of unfiltered tiny impurities on the printing effect. Through the careful design of the material and structure of the fourth filter 14, it is possible to improve the ink recovery efficiency while ensuring its high strength and corrosion resistance.

[0073] Furthermore, the suction structure 7 includes an oil pipe 8 and a drive ring structure 9;

[0074] Observed along the first direction perpendicular to the oil pipe 8 , the oil pipe passes through the oil outlet 3 and is connected to the drive ring structure 9 . The drive ring abuts against the fourth filter 14 and contacts the pure ink 17 . The drive ring is connected to the oil pipe 8 .

[0075] Specifically, the suction structure 7 includes an oil pipe 8 and a drive ring structure 9. The oil pipe 8 passes through the oil outlet 3 and is connected to the drive ring structure 9. The drive ring structure 9 effectively guides the pure ink 17 to other equipment or containers through contact with the fourth filter 14. This design ensures the fluidity of the ink in position, while greatly improving the utilization rate of the ink through an efficient transmission mechanism, reducing unnecessary waste. The design of the drive ring not only takes functionality into consideration, but also optimizes the ink extraction process, enabling it to quickly and efficiently meet production needs. The advantage of this structure is that it can flexibly adapt to the needs of different production lines, ensure the continuity of the ink supply, and provide guarantees for the normal operation of the equipment.

[0076] Furthermore, the driving ring structure 9 includes a magnetic member 15 . When viewed along the first direction perpendicular to the first direction, the magnetic member 15 is connected between the driving ring structure 9 and the fourth filter screen 14 , and the magnetic member 15 is magnetically connected to the fourth filter screen 14 .

[0077] Specifically, the drive ring structure 9 includes a magnetic member 15, which is connected between the drive ring structure 9 and the fourth filter screen 14 and is magnetically connected to the fourth filter screen 14. This design improves the stability between the drive ring and the filter screen, ensuring that the connection is not prone to displacement or leakage when pure ink 17 is absorbed. The use of the magnetic member 15 allows for quick assembly and disassembly, reducing the time and difficulty of equipment maintenance, thereby improving overall work efficiency. The beneficial effect of this structural design is that it enhances the transmission safety of the ink, ensuring that the ink will not be contaminated or leaked due to loose connections under high pressure and flow conditions, thereby further ensuring the quality of the ink.

[0078] More preferably, the fourth filter screen 14 is made of stainless steel.

[0079] Specifically, the fourth filter 14 is made of stainless steel. This material ensures long-term stability in highly corrosive ink environments, significantly improving the filter's durability. This design also benefits by reducing equipment maintenance frequency and extending its service life, thereby reducing long-term operating costs. Furthermore, the ease of cleaning provided by stainless steel facilitates equipment maintenance and ensures ink purity.

[0080] Furthermore, the driving ring structure 9 further includes a heating ring 16 . When viewed along the first direction, the heating ring 16 is arranged side by side with the magnetic member 15 and the heating ring 16 contacts the pure ink 17 . The driving ring structure 9 can drive the heating ring 16 to heat the pure ink 17 .

[0081] Specifically, the drive ring structure 9 also includes a heating ring 16, which is arranged side by side with the magnetic part 15 and contacts the pure ink 17, which can effectively improve the fluidity of the ink. This design reduces the viscosity of the ink through the heating function, improves its fluidity during the printing process, and allows the ink to pass through the filter and pipe more smoothly, ensuring the efficiency of the printing process. The advantage of such a heating design is that it can be dynamically adjusted according to the characteristics of different types of inks, and flexibly respond to the needs under different printing conditions, thereby optimizing the use effect of the ink and avoiding ink solidification problems caused by too low temperature. In addition, the application of the heating ring 16 not only improves the printing quality, but also significantly reduces production stagnation caused by uneven ink temperature.

[0082] The above is only an implementation method of the present application. It should be pointed out that for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present application, but these all fall within the scope of protection of the present application.

Claims

1. An ink recovery device, characterized in that: include: The tank body is placed on the ground, and the top of the tank body includes an oil inlet and an oil outlet arranged side by side; A graded filter structure, viewed along the height direction of the tank body, facing the oil inlet and disposed within the tank body; The height direction of the tank body is a first direction, the graded filter structure partitions the tank body along the first direction to form a filter cavity and a recovery cavity, the oil inlet is connected to the filter cavity, and the oil outlet is connected to the recovery cavity; a suction structure, passing through the oil outlet in the first direction and abutting against the bottom end of the tank body; The ink containing impurities flows into the tank body along the oil inlet and is filtered through the graded filter structure along the first direction to generate pure ink that flows into the bottom end of the tank body.

2. The ink recovery device according to claim 1, characterized in that: The grading filter structure includes a grading filter and a partition plate connected to the grading filter; When viewed along the first vertical direction, one end of the partition plate passes through the grading filter screen and abuts against the bottom end of the tank body to form the filtration cavity and the recovery cavity, and the other end is connected to the top end of the tank body; The grading filter is a multi-layer filter structure arranged in parallel along the first direction. When viewed perpendicularly to the first direction, one end of the grading filter is embedded in the filter cavity, and the other end is connected to the partition plate.

3. The ink recovery device according to claim 2, characterized in that: The grading filter includes a first filter. When viewed perpendicular to the first direction, the first filter is arranged near the top of the tank body, and one end of the first filter is embedded in the filter cavity, and the other end is connected to the partition plate.

4. The ink recovery device according to claim 3, characterized in that: The grading filter screen also includes a second filter screen; When viewed perpendicularly to the first direction, the second filter screen is disposed on a side of the first filter screen that is away from the top of the tank body, and one end of the second filter screen is embedded in the filter cavity, and the other end is connected to the partition plate; Observed along the first direction, the inner diameter of the filter holes of the first filter screen is larger than the inner diameter of the second filter screen.

5. The ink recovery device according to claim 4, characterized in that: The grading filter screen also includes a third filter screen; When viewed perpendicularly to the first direction, the third filter screen is disposed on a side of the second filter screen that faces away from the first filter screen, and one end of the third filter screen is embedded in the filter cavity, and the other end is connected to the partition plate; Observed along the first direction, the inner diameter of the filter holes of the second filter screen is larger than the inner diameter of the third filter screen.

6. The ink recovery device according to claim 5, characterized in that: The grading filter screen also includes a fourth filter screen; When viewed perpendicularly to the first direction, the fourth filter screen is provided at the bottom end of the tank body, the fourth filter screen is fixed inside the tank body, and one end of the partition plate is fixed to the top end of the tank body, and the other end is fixed to the fourth filter screen; Observed along the first direction, the inner diameter of the filter holes of the third filter screen is larger than the inner diameter of the fourth filter screen.

7. The ink recovery device according to claim 6, characterized in that: The suction structure includes an oil pipe and a drive ring structure; Observed along the first direction perpendicular to the oil pipe, the oil pipe passes through the oil outlet and is connected to the drive ring structure. The drive ring abuts against the fourth filter screen and contacts the pure ink. The drive ring is connected to the oil pipe.

8. The ink recovery device according to claim 7, characterized in that: The driving ring structure includes a magnetic component. When viewed along the first direction perpendicular to the first direction, the magnetic component is connected between the driving ring structure and the fourth filter screen, and the magnetic component is magnetically connected to the fourth filter screen.

9. The ink recovery device according to claim 6, characterized in that: The fourth filter screen is made of stainless steel.

10. The ink recovery device according to claim 8, characterized in that: The driving ring structure further includes a heating ring. When viewed along the first direction, the heating ring and the magnetic member are arranged side by side and the heating ring contacts the pure ink. The driving ring structure can drive the heating ring to heat the pure ink.

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