A dynamic ink supply system

Abstract

The invention discloses a dynamic ink supply system, comprising a control module, an ink supply pump, a main ink storage box, a primary auxiliary ink storage box, a secondary auxiliary ink storage box and a printing nozzle; the main ink storage box supplies ink to the primary auxiliary ink storage box through the ink supply pump; the primary auxiliary ink storage box is connected to the secondary auxiliary ink storage box, and the ink liquid level in the primary auxiliary ink storage box is higher than the ink liquid level in the secondary auxiliary ink storage box; the secondary auxiliary ink storage box is connected to the printing nozzle; a pressure sensor is fixedly arranged in the secondary auxiliary ink storage box, and the detection head of the pressure sensor is immersed in the ink in the secondary auxiliary ink storage box; the control module is electrically connected to the ink supply pump and the pressure sensor respectively; the control module is used to adjust the power of the ink supply pump according to the pressure value currently measured by the pressure sensor, and the power of the ink supply pump is inversely proportional to the pressure value. The dynamic ink supply system of the invention can effectively reduce the impact of the ink supply pump on the printing nozzle when supplying ink, thereby improving the quality of inkjet printing.

Description

Technical Field

[0001] The invention relates to the technical field of ink supply for printing presses, and in particular to a dynamic ink supply system. Background Art

[0002] In inkjet printing, a continuous and stable ink supply system is one of the most critical factors to ensure printing quality.

[0003] At present, the existing ink supply system includes a main ink storage cartridge and a sub-ink storage cartridge. The ink in the main ink storage cartridge is supplied to the sub-ink storage cartridge through an ink supply pump, and the sub-ink storage cartridge then sprays ink through the printing nozzle. This two-level ink supply structure controls the on and off of the ink supply pump through digital signals such as the float switch position of the sub-ink storage cartridge. In the prior art, when the ink in the sub-ink storage cartridge is consumed to the limit, the ink supply pump immediately starts to pump ink at full speed according to the digital signal to pump ink to the sub-ink storage cartridge, and the ink pumped out by the ink supply pump will enter the sub-ink storage cartridge in large quantities. The large amount of ink entering the sub-ink storage cartridge will produce a large pressure shock to the printing nozzle, thereby causing the printing nozzle to have problems such as splashing and ink throwing, which greatly affects the printing quality.

[0004] Therefore, it is necessary to design a dynamic ink supply system to prevent the ink supply system from generating a large pressure shock to the print head during the ink replenishing process, thereby better ensuring the printing quality. Summary of the invention

[0005] The object of the present invention is to provide a dynamic ink supply system to solve the problem that the pressure shock caused by the start-up of the ink pump during the ink supply process is too large, thus affecting the printing quality.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A dynamic ink supply system includes a control module, an ink supply pump, a main ink storage cartridge, a primary auxiliary ink storage cartridge, a secondary auxiliary ink storage cartridge and a print head;

[0008] The main ink tank supplies ink to the primary auxiliary ink tank through the ink supply pump;

[0009] The primary auxiliary ink tank is connected to the secondary auxiliary ink tank, and the ink level in the primary auxiliary ink tank is higher than the ink level in the secondary auxiliary ink tank; the secondary auxiliary ink tank is connected to the print head;

[0010] A pressure sensor is fixedly arranged in the secondary auxiliary ink tank, and a detection head of the pressure sensor is immersed in the ink in the secondary auxiliary ink tank;

[0011] The control module is electrically connected to the ink supply pump and the pressure sensor respectively; the control module is used to adjust the power of the ink supply pump according to the pressure value currently measured by the pressure sensor, and the power of the ink supply pump is inversely proportional to the pressure value.

[0012] Optionally, a buffer plate is fixedly arranged in the inner cavity of the secondary auxiliary ink storage box; an ink inlet and an ink outlet are respectively arranged on the side walls of the secondary auxiliary ink storage box on two opposite sides of the buffer plate; the ink inlet is connected to the primary auxiliary ink storage box through a first pipe; the ink outlet is connected to the print head through a second pipe;

[0013] The ink inlet is directly opposite to the plate surface of the buffer plate, and the pressure sensor and the ink outlet are located on the same side of the buffer plate.

[0014] Optionally, the inner cavity of the secondary auxiliary ink storage cartridge is filled with ink; the secondary auxiliary ink storage cartridge comprises a box body with an opening on one side and a top cover sealingly covering the opening of the box body; the buffer plate is fixedly connected to the bottom of the top cover, and an ink channel is formed between the buffer plate and the bottom of the inner cavity of the secondary auxiliary ink storage cartridge.

[0015] Optionally, the buffer plate is provided with a plurality of buffer through holes penetrating two opposite sides of the buffer plate.

[0016] Optionally, the first-level auxiliary ink storage cartridge is provided with a positive and negative pressure regulating device for controlling the air pressure value in the first-level auxiliary ink storage cartridge.

[0017] Optionally, the dynamic ink supply system further comprises a third pipe for connecting the primary auxiliary ink tank and the secondary auxiliary ink tank; the primary auxiliary ink tank and the secondary auxiliary ink tank are both provided with openings at the bottom, and both ends of the third pipe are respectively connected to the two openings;

[0018] The primary auxiliary ink storage box, the first pipe, the secondary auxiliary ink storage box and the third pipe form an ink circulation channel, and a heating sheet for heating ink is arranged in the ink circulation channel;

[0019] The third pipeline is provided with a first circulation pump for driving the ink to flow along the ink circulation channel and a first control valve for controlling the opening and closing of the third pipeline;

[0020] The control module is electrically connected to the first circulation pump, the first control valve and the heating plate respectively.

[0021] Optionally, the primary auxiliary ink tank is provided with a first temperature measuring device, and the secondary auxiliary ink tank is provided with a second temperature measuring device; the control module is electrically connected to the first temperature measuring device and the second temperature measuring device respectively;

[0022] The first temperature measuring device is used to detect the temperature of the ink in the first-level auxiliary ink tank, and the second temperature measuring device is used to detect the temperature of the ink in the second-level auxiliary ink tank;

[0023] The control module is used to calculate the absolute value of the temperature difference between the temperature information detected by the first temperature measuring device and the temperature information detected by the second temperature measuring device, and is also used to open the first control valve and control the first circulation pump and the heating plate to start working when the dynamic ink supply system is in a standby state if the absolute value of the temperature difference is greater than the preset temperature difference; and is also used to control the first circulation pump and the heating plate to stop working and close the first control valve when the dynamic ink supply system is in a standby state if the absolute value of the temperature difference is less than the preset temperature difference.

[0024] Optionally, it further comprises a fourth pipeline and a fifth pipeline; the fourth pipeline is connected to the main ink storage cartridge and the primary auxiliary ink storage cartridge, and the ink supply pump supplies ink to the main ink storage cartridge through the fourth pipeline; the fourth pipeline is also provided with a second control valve for controlling the opening and closing of the fourth pipeline;

[0025] The second pipeline is provided with a third control valve for controlling the opening and closing of the second pipeline;

[0026] The fifth pipeline is connected to the main ink tank and the second pipeline; the connection between the fifth pipeline and the second pipeline is located between the third control valve and the secondary auxiliary ink tank; the fifth pipeline is provided with an ink return pump for pumping ink back to the main ink tank and a fourth control valve for controlling the opening and closing of the fourth pipeline;

[0027] The control module is electrically connected to the second control valve, the third control valve, the ink return pump and the fourth control valve respectively.

[0028] Optionally, a degassing membrane is further provided on the third pipe for degassing the ink flowing through the third pipe.

[0029] Optionally, the heating plate is located at the bottom of the inner cavity of the first-level auxiliary ink storage cartridge.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The dynamic ink supply system provided by the present embodiment is that the main ink storage cartridge supplies ink to the primary auxiliary ink storage cartridge through the ink supply pump, and the impact force of the ink pumped out by the ink supply pump is directly borne by the primary auxiliary ink storage cartridge and does not directly act on the print nozzle; a pressure sensor is fixedly arranged in the secondary auxiliary ink storage cartridge, and the ink in the primary auxiliary ink storage cartridge will flow to the secondary auxiliary ink storage cartridge under the action of gravity, and the control module adjusts the ink supply flow rate of the ink supply pump according to the pressure feedback of the pressure sensor to reduce the impact force of the ink flowing into the secondary auxiliary ink storage cartridge on the secondary auxiliary ink storage cartridge, so as to keep the ink supply pressure of the secondary auxiliary ink storage cartridge stable; the dynamic ink supply system of the present invention can well maintain the ink supply pressure of the secondary auxiliary ink storage cartridge to the print nozzle, greatly reduces the impact force of the ink on the print nozzle when the ink supply pump is started, and improves the quality of inkjet printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0034] Figure 1 A schematic diagram of a dynamic ink supply system provided in an embodiment of the present invention.

[0035] Illustrations: 1. Ink supply pump; 2. Main ink storage cartridge; 3. Primary auxiliary ink storage cartridge; 31. Positive and negative pressure regulating device; 32. Heating plate; 33. First temperature measuring device; 34. Second temperature measuring device; 4. Secondary auxiliary ink storage cartridge; 41. Pressure sensor; 42. Buffer plate; 5. Print head; 61. First pipeline; 62. Second pipeline; 63. Third pipeline; 64. Fourth pipeline; 65. Fifth pipeline; 71. First circulation pump; 81. First control valve; 82. Second control valve; 83. Third control valve; 84. Fourth control valve; 9. Degassing membrane; 100. Filter; 200 Float switch; 300. Dispenser. DETAILED DESCRIPTION

[0036] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0038] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0039] The embodiment of the present invention provides a dynamic ink supply system for reducing the pressure impact of the start and stop of the ink supply pump 1 on the print head 5, so as to avoid problems such as splashing and ink throwing on the print head 5, and further improve the quality of inkjet printing.

[0040] See also Figure 1 The dynamic ink supply system includes a control module, an ink supply pump 1, a main ink storage cartridge 2, a primary auxiliary ink storage cartridge 3, a secondary auxiliary ink storage cartridge 4 and a print head 5.

[0041] The control module is used to control the electronic components in the system.

[0042] The main ink storage cartridge 2 contains ink, and the main ink storage cartridge 2 supplies ink to the primary auxiliary ink storage cartridge 3 through the ink supply pump 1 .

[0043] The primary auxiliary ink tank 3 is connected to the secondary auxiliary ink tank 4, and the liquid level of the primary auxiliary ink tank 3 is higher than that of the secondary auxiliary ink tank 4, so that the ink in the primary auxiliary ink tank 3 can flow to the secondary auxiliary ink tank 4 under the action of gravity. The ink in the secondary auxiliary ink tank 4 is directly provided to the print head 5 for inkjet printing.

[0044] In this embodiment, a pressure sensor 41 is fixedly disposed in the secondary auxiliary ink tank 4, and a detection head of the pressure sensor 41 is immersed in the ink in the secondary auxiliary ink tank 4 to measure the pressure of the ink.

[0045] The control module is electrically connected to the ink supply pump 1 and the pressure sensor 41, respectively. Specifically, the control module is used to adjust the power of the ink supply pump 1 according to the pressure value currently measured by the pressure sensor 41, and the power of the ink supply pump 1 is inversely proportional to the pressure value. The higher the currently measured pressure value detected by the pressure sensor 41, the smaller the ink supply flow rate of the ink supply pump 1, so as to achieve the purpose of controlling the ink pressure of the secondary auxiliary ink storage cartridge 4 to maintain a stable state, and avoid excessive fluctuations in the ink pressure of the secondary auxiliary ink storage cartridge 4 affecting the quality of inkjet printing. It is worth noting that in this embodiment, the control module is used to perform negative feedback adjustment on the pressure value of the pressure sensor 41 according to the ink supply flow rate of the ink supply pump 1, so that the ink pressure in the secondary auxiliary ink storage cartridge 4 always remains stable.

[0046] In a specific implementation of this embodiment, a buffer plate 42 is fixedly arranged in the inner cavity of the secondary auxiliary ink tank 4; an ink inlet and an ink outlet are respectively arranged on the side walls of the secondary auxiliary ink tank 4 on opposite sides of the buffer plate 42; the ink inlet is connected to the primary auxiliary ink tank 3 through a first pipe 61; the ink outlet is connected to the print head 5 through a second pipe 62; the ink inlet is directly opposite to the plate surface of the buffer plate 42, and the pressure sensor 41 and the ink outlet are located on the same side of the buffer plate 42. The ink ejected from the first pipe 61 through the ink inlet flows to the plate surface of the buffer plate 42, and the buffer plate 42 plays a role in slowing down the impact of the flowing ink, thereby avoiding excessive fluctuations in the pressure value of the ink in the secondary auxiliary ink tank 4. The pressure sensor 41 and the ink outlet are located on the same side of the buffer plate 42, and the ink pressure detected by the pressure sensor 41 is closer to the ink supply pressure of the secondary auxiliary ink tank 4 to the print head 5, so as to improve the accuracy of the control module in controlling the amount of ink in the secondary auxiliary ink tank 4, thereby improving the stability of the ink ejection of the print head 5.

[0047] In another specific implementation of this embodiment, the inner cavity of the secondary auxiliary ink tank 4 is filled with ink to prevent the ink from entering the secondary auxiliary ink tank 4, causing the liquid surface vibration to affect the ink supply pressure. In particular, the secondary auxiliary ink tank 4 includes a box body with an opening on one side and an open upper cover that is sealed to cover the box body, and the buffer plate 42 is fixedly connected to the bottom of the top cover of the secondary auxiliary ink tank 4. The buffer plate 42 and the bottom of the secondary auxiliary ink tank 4 form an ink supply channel. Specifically, the ink supply channel is provided to increase the ink supply flow rate of the secondary auxiliary ink tank 4 and avoid the situation where the print head 5 cannot spray ink due to insufficient ink supply.

[0048] Optionally, the buffer plate 42 includes a first plate surface and a second plate surface opposite to each other, and a plurality of buffer through holes are provided on the buffer plate 42, which penetrate from the first plate surface to the second plate surface. Specifically, the buffer plate 42 is densely arrayed with a plurality of through holes, and the diameter of the through holes should not be too large, and the aperture of the through holes should be kept below 0.25 mm. The specific through hole diameter should be set according to the specific situation.

[0049] Optionally, the primary auxiliary ink tank 3 is provided with a positive and negative pressure regulating device 31 for controlling the air pressure value in the primary auxiliary ink tank 3. It should be known that during printing, the positive and negative pressure regulating device 31 controls the air pressure in the primary auxiliary ink tank 3 to be slightly negative pressure to prevent ink from falling directly from the print head 5. During the cleaning process, the positive and negative pressure regulating device 31 controls the air pressure in the primary auxiliary ink tank 3 to be positive pressure, allowing ink to flow out of the print head 5 to clean the print head 5.

[0050] Optionally, the dynamic ink supply system provided in this embodiment further includes a third pipe 63, which is connected to the primary auxiliary ink tank 3 and the secondary auxiliary ink tank 4; the primary auxiliary ink tank 3, the first pipe 61, the secondary auxiliary ink tank 4 and the third pipe 63 form an ink circulation channel, and a heating plate 32 for heating ink is provided in the ink circulation channel; the third pipe 63 is provided with a first circulation pump 71 for driving the ink to flow along the ink circulation channel and a first control valve 81 for controlling the opening and closing of the third pipe 63; the control module is electrically connected to the first circulation pump 71, the first control valve 81 and the heating plate 32 respectively. Specifically, when heating the ink in the ink circulation channel, other outlets need to be closed first; the first control valve 81 keeps the third pipe 63 in a connected state, the first circulation pump 71 drives the ink to circulate, and the heating plate 32 continues to heat the ink. The provision of the first circulation pump 71 and the heating plate 32 can make the temperature uniformity of the ink in the secondary auxiliary ink tank 4 higher, which is conducive to improving the quality of inkjet printing.

[0051] In addition, when the first circulation pump 71 drives the ink to circulate, the degassing membrane 9 on the third pipe 62 degases the ink to prevent the gas dissolved in the ink from causing excessive impact on the continuity of inkjet, thereby improving the continuity of inkjet printing. Strong inkjet continuity can improve the quality of inkjet printing.

[0052] Optionally, a first temperature measuring device 33 is provided in the primary auxiliary ink tank 3, and a second temperature measuring device 34 is provided in the secondary auxiliary ink tank 4; the control module is electrically connected to the first temperature measuring device 33 and the second temperature measuring device 34 respectively. The first temperature measuring device 33 is used to detect the temperature of the ink in the primary auxiliary ink tank 3 and transmit the temperature information to the control module, and the second temperature measuring device 34 is used to detect the temperature of the ink in the secondary auxiliary ink tank 4 and transmit the temperature information to the control module; the control module is used to calculate the absolute value of the temperature difference between the temperature information detected by the first temperature measuring device 33 and the temperature information detected by the second temperature measuring device 34, and compare the absolute value of the temperature difference with the preset temperature difference. It should be clear that when the dynamic ink supply system is in the standby state, if the absolute value of the temperature difference is greater than the preset temperature difference, the first control valve 81 is opened, and the first circulation pump 71 and the heating plate 32 are controlled to start working; if the temperature difference is less than the preset temperature difference, the control module controls the first circulation pump 71 to stop pumping ink, controls the heating plate 32 to stop heating, and closes the first control valve 81.

[0053] The dynamic ink supply system also includes a fourth pipeline 64 and a fifth pipeline 65; the fourth pipeline 64 connects the main ink tank 2 and the first-level auxiliary ink tank 3, and the ink supply pump 1 supplies ink to the main ink tank 2 through the fourth pipeline 64; the fourth pipeline 64 is also provided with a second control valve 82 for controlling the opening and closing of the fourth pipeline 64; the second pipeline 62 is provided with a third control valve 83 for controlling the opening and closing of the second pipeline 62; the fifth pipeline 65 connects the main ink tank 2 and the second pipeline 62; the connection between the fifth pipeline 65 and the second pipeline 62 is located between the third control valve 83 and the second-level auxiliary ink tank 4; the fifth pipeline 65 is provided with an ink return pump 73 for pumping ink back to the main ink tank 2 and a fourth control valve 84 for controlling the opening and closing of the fourth pipeline 64.

[0054] It should be noted that the main ink storage cartridge 2, the fourth pipe 64, the first-level auxiliary ink storage cartridge 3, the first pipe 61, the second-level auxiliary ink storage cartridge 4, the second pipe 62 and the fifth pipe 65 form a circulation loop. The ink can circulate along the circulation loop under the drive of the ink supply pump 1. Specifically, it can be set to start the ink supply pump 1 to drive the ink to circulate along the circulation loop for a second set time after an interval of the first set time. For example, at an interval of 12 hours, the ink supply pump 1 drives the ink to circulate along the circulation loop for 5 minutes. Specifically, the second set time can be determined according to the ink supply flow rate of the ink supply pump 1 and the amount of ink in the main ink storage cartridge 2.

[0055] In addition, the ink return pump 73 is used to discharge the ink in the secondary auxiliary ink storage box 4 when changing ink, so as to further improve the speed of ink changing. It is worth noting that the ink return pump 73 can also be used to assist the ink supply pump 1 to drive the ink to circulate along the circulation loop.

[0056] Optionally, the heating plate 32 is located at the bottom of the cavity of the primary auxiliary ink tank 3, and the gas escaping during the heating process can be discharged to the outside through the positive and negative pressure regulating device 31.

[0057] In addition, a filter 100 for filtering the ink supplied by the ink supply pump 1 is also provided on the fourth pipe 64; before the ink flows to the print head 5, it needs to pass through the distributor 300, and the distributor 300 is used to distribute the ink from the second pipe 62 to multiple print heads 5 for spraying.

[0058] In addition, a float switch 200 is provided in the primary auxiliary ink storage cartridge 3. The float switch is only used to calibrate the initial pressure of the secondary auxiliary ink storage cartridge 4 and is not used as a signal to control the start and stop of the ink supply pump.

[0059] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dynamic ink supply system, characterized in that: It comprises a control module, an ink supply pump (1), a main ink storage cartridge (2), a primary auxiliary ink storage cartridge (3), a secondary auxiliary ink storage cartridge (4) and a printing nozzle (5); The main ink storage cartridge (2) supplies ink to the primary auxiliary ink storage cartridge (3) via the ink supply pump (1); The primary auxiliary ink storage box (3) is connected to the secondary auxiliary ink storage box (4), and the ink liquid level in the primary auxiliary ink storage box (3) is higher than the ink liquid level in the secondary auxiliary ink storage box (4); the secondary auxiliary ink storage box (4) is connected to the printing nozzle (5); A pressure sensor (41) is fixedly arranged in the secondary auxiliary ink storage cartridge (4), and a detection head of the pressure sensor (41) is immersed in the ink in the secondary auxiliary ink storage cartridge (4); The control module is electrically connected to the ink supply pump (1) and the pressure sensor (41) respectively; the control module is used to adjust the power of the ink supply pump (1) according to the pressure value currently measured by the pressure sensor (41), and the power of the ink supply pump (1) is inversely proportional to the pressure value; A buffer plate (42) is fixedly arranged in the inner cavity of the secondary auxiliary ink storage box (4); an ink inlet and an ink outlet are respectively arranged on the side walls of the secondary auxiliary ink storage box (4) on two opposite sides of the buffer plate (42); the ink inlet is connected to the primary auxiliary ink storage box (3) through a first pipe (61); the ink outlet is connected to the printing nozzle (5) through a second pipe (62); The ink inlet is directly opposite to the plate surface of the buffer plate (42), and the pressure sensor (41) and the ink outlet are located on the same side of the buffer plate (42); The first-level auxiliary ink storage box (3) is provided with a positive and negative pressure regulating device (31) for controlling the air pressure value inside the first-level auxiliary ink storage box (3).

2. The dynamic ink supply system according to claim 1, characterized in that: The inner cavity of the secondary auxiliary ink storage box (4) is filled with ink; the secondary auxiliary ink storage box (4) comprises a box body with an opening on one side and a top cover sealingly covering the opening of the box body; the buffer plate (42) is fixedly connected to the bottom of the top cover, and an ink channel is formed between the buffer plate (42) and the bottom of the inner cavity of the secondary auxiliary ink storage box (4).

3. The dynamic ink supply system according to claim 1, characterized in that: The buffer plate (42) is provided with a plurality of buffer through holes penetrating two opposite sides of the buffer plate (42).

4. The dynamic ink supply system according to claim 1, characterized in that: It also includes a third pipe (63) for connecting the primary auxiliary ink storage box (3) and the secondary auxiliary ink storage box (4); the bottoms of the primary auxiliary ink storage box (3) and the secondary auxiliary ink storage box (4) are both provided with openings, and the two ends of the third pipe (63) are respectively connected to the two openings; The primary auxiliary ink storage box (3), the first pipe (61), the secondary auxiliary ink storage box (4) and the third pipe (63) form an ink circulation channel, and a heating plate (32) for heating ink is arranged in the ink circulation channel; The third pipe (63) is provided with a first circulation pump (71) for driving the ink to flow along the ink circulation channel and a first control valve (81) for controlling the opening and closing of the third pipe (63); The control module is electrically connected to the first circulation pump (71), the first control valve (81) and the heating plate (32) respectively.

5. The dynamic ink supply system according to claim 4, characterized in that: The first-level auxiliary ink storage box (3) is provided with a first temperature measuring device (33), and the second-level auxiliary ink storage box (4) is provided with a second temperature measuring device (34); the control module is electrically connected to the first temperature measuring device (33) and the second temperature measuring device (34) respectively; The first temperature measuring device (33) is used to detect the temperature of the ink in the first-level auxiliary ink storage box (3), and the second temperature measuring device (34) is used to detect the temperature of the ink in the second-level auxiliary ink storage box (4); The control module is used to calculate the absolute value of the temperature difference between the temperature information detected by the first temperature measuring device (33) and the temperature information detected by the second temperature measuring device (34), and is also used to open the first control valve (81) and control the first circulation pump (71) and the heating plate (32) to start working when the dynamic ink supply system is in a standby state if the absolute value of the temperature difference is greater than a preset temperature difference; and is also used to control the first circulation pump (71) and the heating plate (32) to stop working and close the first control valve (81) when the dynamic ink supply system is in a standby state if the absolute value of the temperature difference is less than the preset temperature difference.

6. The dynamic ink supply system according to claim 5, characterized in that: The ink cartridge (2) and the secondary ink cartridge (3) are connected to each other by the fourth pipe (64); the ink supply pump (1) supplies ink to the primary ink cartridge (2) through the fourth pipe (64); and a second control valve (82) for controlling the opening and closing of the fourth pipe (64) is also arranged on the fourth pipe (64); The second pipeline (62) is provided with a third control valve (83) for controlling the opening and closing of the second pipeline (62); The fifth pipeline (65) is connected to the main ink storage cartridge (2) and the second pipeline (62); the connection between the fifth pipeline (65) and the second pipeline (62) is located between the third control valve (83) and the secondary auxiliary ink storage cartridge (4); the fifth pipeline (65) is provided with an ink return pump (73) for pumping ink back to the main ink storage cartridge (2) and a fourth control valve (84) for controlling the opening and closing of the fourth pipeline (64); The control module is electrically connected to the second control valve (82), the third control valve (83), the ink return pump (73) and the fourth control valve (84) respectively.

7. The dynamic ink supply system according to claim 4, characterized in that: The third pipe (63) is also provided with a degassing membrane (9) for degassing the ink flowing through the third pipe (63).

8. The dynamic ink supply system according to claim 4, characterized in that: The heating plate (32) is located at the bottom of the inner cavity of the first-level auxiliary ink storage box (3).

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