Ink-jet circulating system of digital printing equipment and ink-jet printing equipment

Abstract

The embodiment of the utility model discloses an ink-jet circulating system of digital printing equipment and the ink-jet printing equipment. The system comprises a primary ink box, a secondary ink box and a printing equipment nozzle, the secondary ink box is provided with a first chamber and a second chamber; an ink outlet of the first-stage ink box is connected with a first cavity of the second-stage ink box through an ink supply pump, and the first cavity of the second-stage ink box is connected with an ink return opening of the first-stage ink box through an electromagnetic valve, so that a first circulation unit is formed. The first chamber ink supply port of the secondary ink box is connected with the printing equipment nozzle, and the nozzle ink return port of the printing equipment nozzle is connected with the second chamber of the secondary ink box to form a second circulation unit. Through the arrangement of the double-circulation structure, printing ink can circulate between the first-stage ink box and the second-stage ink box and between the two cavities of the second-stage ink box, and the problems that subsequent printing is affected due to the fact that the printing ink in the second-stage ink box cannot be discharged in time when the ink box is not used and the printing ink in the second-stage ink box is stagnant and prone to sedimentation are effectively solved; double circulation of printing ink can be achieved, and the use efficiency is improved.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the technical field of printing equipment, and more particularly to an inkjet circulation system and an inkjet printing equipment for a digital printing device. Background Art

[0002] Disclosing the information of this background art section is only intended to enhance the understanding of the overall background of the present disclosure, and is not necessarily regarded as an admission or an implication in any form that this information constitutes relevant art that is already known to those of ordinary skill in the art.

[0003] In the related art, in the inkjet system of a printing device, direct-feed ink cartridges are generally used for inkjetting. That is, when the device is started, the primary ink cartridge supplies ink to the secondary ink cartridge, and waits for a printing instruction to perform printing. However, sometimes, in order to detect the start of the device, the primary ink cartridge still supplies ink to the secondary ink cartridge, which easily causes ink retention in the secondary ink cartridge, and precipitation will occur after a long time, resulting in ink waste. In addition, the secondary ink cartridge needs to be cleaned, which is very troublesome, increases costs, and reduces efficiency. Summary of the Invention

[0004] Therefore, embodiments of the present disclosure provide an inkjet circulation system and an inkjet printing equipment for a digital printing device to solve the problems of waste caused by ink storage in the secondary ink cartridge and increased costs and reduced efficiency in the related art.

[0005] In order to avoid ink retention in the secondary ink cartridge affecting subsequent printing and achieve the purpose of improving the use efficiency and reducing the maintenance cost, the embodiments of the present disclosure provide the following technical solutions:

[0006] In the first aspect of the embodiments of the present disclosure, an inkjet circulation system for a digital printing device is provided, including

[0007] A primary ink cartridge:

[0008] A secondary ink cartridge having a first chamber and a second chamber;

[0009] A printhead of the printing device;

[0010] The ink outlet of the primary ink cartridge is connected to the first chamber of the secondary ink cartridge through an ink supply pump, and the first chamber of the secondary ink cartridge is connected to the ink return port of the primary ink cartridge through a solenoid valve, forming a first circulation unit;

[0011] The ink supply port of the first chamber of the secondary ink cartridge is connected to the printhead of the printing device, and the printhead ink return port of the printhead is connected to the second chamber of the secondary ink cartridge, forming a second circulation unit.

[0012] In one embodiment, a circulation return pipe is further provided between the first chamber and the second chamber of the secondary ink cartridge. A circulating ink pump is provided on the return pipe, and the ink return direction of the return pipe is from the second chamber to the first chamber. The first chamber is connected to a negative pressure system.

[0013] In one embodiment, a circulation filter is further provided on the return pipe between the circulating ink pump and the second chamber.

[0014] In one embodiment, stirring devices are provided inside both the primary ink cartridge and the secondary ink cartridge, and heating patches are provided outside both the first chamber and the second chamber on the secondary ink cartridge.

[0015] In one embodiment, a primary filter is further provided between the ink outlet of the primary ink cartridge and the ink supply pump.

[0016] In a second aspect of the embodiments of the present disclosure, an inkjet printing device is provided, which is characterized in that it includes an inkjet circulation system of a digital printing device as described in any one of the above.

[0017] According to the embodiments of the present disclosure, the system has the following advantages: The system includes a primary ink cartridge, a secondary ink cartridge, and a printhead of a printing device; the secondary ink cartridge has a first chamber and a second chamber; the ink outlet of the primary ink cartridge is connected to the first chamber of the secondary ink cartridge through an ink supply pump, and the first chamber of the secondary ink cartridge is connected to the ink return port of the primary ink cartridge through a solenoid valve, forming a first circulation unit; the ink supply port of the first chamber of the secondary ink cartridge is connected to the printhead of the printing device, and the printhead ink return port of the printhead of the printing device is connected to the second chamber of the secondary ink cartridge, forming a second circulation unit. By setting up a double circulation structure, it is possible to realize the circulation of ink between the primary ink cartridge and the secondary ink cartridge and between the two chambers of the secondary ink cartridge, effectively avoiding the problems that the ink in the secondary ink cartridge cannot be discharged in time when not in use, which affects subsequent printing, and the ink in the secondary ink cartridge is prone to precipitation, enabling the ink to achieve double circulation and improving the use efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the related art, the following will briefly introduce the drawings required for use in the description of the embodiments or the related art. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, other implementation drawings can be obtained by extending according to the provided drawings without creative work.

[0019] The structures, ratios, sizes, etc. shown in this specification are only used to match the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions under which the present disclosure can be implemented. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the efficacy that the present disclosure can produce and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in the present disclosure.

[0020] Figure 1 It is a system block diagram of an inkjet circulation system of a digital printing device shown according to an exemplary embodiment.

[0021] In the figure: 1, primary ink cartridge; 2, secondary ink cartridge; 3, printhead of the printing device; 4, ink supply pump; 5, solenoid valve; 6, circulating ink pump; 7, negative pressure system; 8, circulating filter; 9, primary filter. Specific embodiments

[0022] The following specific embodiments illustrate the implementation manners of the present disclosure. Those familiar with this technology can easily understand other advantages and effects of the present disclosure from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope protected by the present disclosure.

[0023] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope that the present disclosure can be implemented. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope that the present disclosure can be implemented.

[0024] As Figure 1 shown, it shows a system block diagram of an inkjet circulation system of a digital printing device provided by an embodiment of the present invention. The system includes a primary ink cartridge 1, a secondary ink cartridge 2, and a printhead 3 of the printing device; the secondary ink cartridge 2 has a first chamber and a second chamber; the ink outlet of the primary ink cartridge 1 is connected to the first chamber of the secondary ink cartridge 2 through an ink supply pump 4, and the first chamber of the secondary ink cartridge 2 is connected to the ink return port of the primary ink cartridge 1 through a solenoid valve 5, forming a first circulation unit; the ink supply port of the first chamber of the secondary ink cartridge 2 is connected to the printhead 3 of the printing device, and the printhead ink return port of the printhead 3 is connected to the second chamber of the secondary ink cartridge 2, forming a second circulation unit.

[0025] Among them, the first circulation unit can supply and return ink through the same pipeline, which are controlled by an ink supply pump 4 and a solenoid valve 5 respectively. The first chamber of the secondary ink cartridge is the ink supply chamber, and the second chamber is the ink return chamber. The first chamber is connected to the ink inlet of the printhead 3 of the printing device, and the ink outlet of the printhead 3 of the printing device is connected to the ink inlet of the second chamber. When the ink in the first chamber flows through the printhead 3 of the printing device to a certain liquid level in the second chamber, the ink in the second chamber is then pumped back to the first chamber through an ink pump to complete the self-circulation of the secondary ink cartridge 2. The upper end of the first chamber is connected to a negative pressure system 7 to ensure a stable state where ink does not drip when the printhead 3 of the printing device is not printing. At the same time, by adjusting the flow rate of the circulation pump in the second chamber and the first chamber, it can cooperate with the magnitude of the negative pressure and also stabilize the state of the surface of the printhead 3 of the printing device. A glass baffle is installed at the left end of the secondary ink cartridge 2, and upper and lower liquid level sensors are installed on the surface of the first chamber. When the ink used during printing is lower than the lowest liquid level sensor, the primary ink cartridge 1 will automatically supply ink to the first chamber of the secondary ink cartridge 2, and when it exceeds the lowest liquid level sensor, the ink supply will automatically stop. The highest liquid level sensor of the secondary ink cartridge 2 is when the lowest liquid level sensor fails, then the primary ink cartridge 1 continuously supplies ink to the first chamber of the secondary ink cartridge 2. At this time, the highest liquid level sensor will sense the ink and stop the ink supply (equivalent to a secondary insurance). If the highest liquid level sensor is not added, it is easy to continuously supply ink, and in this way, the ink will be sucked back into the negative pressure system 7, causing damage to the negative pressure system 7. Stirring rods are provided at the bottoms of the first chamber and the second chamber of the secondary ink cartridge 2, which rotate and stir continuously for 24 hours to avoid sedimentation and blockage of the printhead 3 of the printing device. When ink pressing is required, that is, when the negative pressure of the negative pressure system 7 stops during ink pressing control and positive pressure is generated, thereby giving the ink in the first chamber a pressure. At this time, the flow rate of the ink will increase, and the ink will flow out from the printhead 3 of the printing device, producing the effect of ink pressing to dredge the printing holes of the printhead 3 of the printing device.

[0026] By setting a double-circulation structure, it is possible to realize the circulation of ink between the primary ink cartridge 1 and the secondary ink cartridge 2 and between the two chambers of the secondary ink cartridge 2, effectively avoiding the problems that the ink in the secondary ink cartridge 2 cannot be discharged in time when not in use, which affects subsequent printing, and that the ink in the secondary ink cartridge 2 is prone to sedimentation, enabling the ink to achieve double circulation and improving the utilization efficiency.

[0027] In one embodiment, in order to make better use of the ink in the second chamber of the secondary ink cartridge 2, a circulation return pipe is also provided between the first chamber and the second chamber of the secondary ink cartridge 2. A circulation ink pump 6 is provided on the return pipe, and the ink return direction of the return pipe is from the second chamber to the first chamber. The first chamber is connected to the negative pressure system 7. The circulation pump is used to circulate the ink in the second chamber to the first chamber for reuse when the storage reaches the maximum capacity or before shutdown, or to the primary ink cartridge 1 through the first circulation unit, improving the utilization rate of the ink, avoiding waste, and saving costs.

[0028] In one embodiment, a circulation filter 8 is further provided on the return pipe between the circulating ink pump 6 and the second chamber. The circulation filter 8 can filter out the ink that has formed deposits in the returned ink, avoiding clogging the printhead 3 of the printing device during use.

[0029] Among them, in order to ensure that the ink is in a uniform state during the use of the printing device, stirring devices are provided inside both the primary ink cartridge 1 and the secondary ink cartridge 2. Heating patches are provided on the secondary ink cartridge 2 outside both the first chamber and the second chamber, and the printing temperature of the printhead 3 of the printing device can be adjusted according to different customer printing environments.

[0030] In one embodiment, a primary filter 9 is further provided between the ink outlet of the primary ink cartridge 1 and the ink supply pump 4. The primary filter 9 can also filter out the ink that has formed deposits in the returned ink, avoiding clogging the printhead 3 of the printing device during use.

[0031] In the second aspect of the embodiments of the present disclosure, an inkjet printing device is provided, which is characterized by including the inkjet circulation system of the digital printing device as described in any one of the above.

[0032] The system controls the operation of the electronic control components through an external air controller. During operation, the glass ink is added to the primary ink cartridge 1 (main ink cartridge) through the ink inlet at the upper end of the primary ink cartridge 1. The primary ink cartridge 1 supplies ink to the first chamber of the secondary ink cartridge 2 through the filter and the action of the ink supply pump 4. At the same time, it returns to the primary ink cartridge 1 through the solenoid valve 5 to complete the self-circulation of the primary ink cartridge 1. The ink in the first chamber of the secondary ink cartridge 2 supplies ink to the printhead 3 of the printing device through the liquid level pressure difference. The ink of the printhead 3 of the printing device flows to the second chamber of the secondary ink cartridge 2 through the ink outlet. The ink in the second chamber of the secondary ink cartridge 2 returns to the first chamber through the action of the circulation pump to complete the small circulation of the secondary ink cartridge 2. The negative pressure system 7 generates a negative pressure suction force on the first chamber. Under the combined action of the negative pressure system 7 and the circulation ink pump 6 from the second chamber to the first chamber, it controls the printhead 3 of the printing device not to leak ink during standby, and at the same time can stably output prints when printing is required, improving the printing efficiency of the inkjet printer.

[0033] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0034] Although the present disclosure has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made thereto on the basis of the present disclosure, which will be obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present disclosure fall within the scope of protection required by the present disclosure.

Claims

1. An inkjet circulation system of a digital printing device, characterized in that, Comprising Primary ink cartridge: Secondary ink cartridge, said secondary ink cartridge having a first chamber and a second chamber; Printing device nozzle; The ink outlet of the primary ink cartridge is connected to the first chamber of the secondary ink cartridge through an ink supply pump, and the first chamber of the secondary ink cartridge is connected to the ink return port of the primary ink cartridge through a solenoid valve, forming a first circulation unit; The ink supply port of the first chamber of the secondary ink cartridge is connected to the printing device nozzle, and the nozzle ink return port of the printing device nozzle is connected to the second chamber of the secondary ink cartridge, forming a second circulation unit.

2. The inkjet circulation system of the digital printing device according to claim 1, characterized in that, A circulation return pipe is also provided between the first chamber and the second chamber of the secondary ink cartridge, a circulation ink pump is provided on the return pipe, the ink return direction of the return pipe is from the second chamber to the first chamber, and the first chamber is connected to a negative pressure system.

3. The inkjet circulation system of the digital printing device according to claim 2, characterized in that, A circulation filter is also provided on the return pipe between the circulation ink pump and the second chamber.

4. The inkjet circulation system of the digital printing device according to claim 3, characterized in that, Stirring devices are provided inside both the primary ink cartridge and the secondary ink cartridge, and heating patches are provided on the secondary ink cartridge outside both the first chamber and the second chamber.

5. The inkjet circulation system of the digital printing device according to claim 1, characterized in that, A primary filter is also provided between the ink outlet of the primary ink cartridge and the ink supply pump.

6. An inkjet printing device, characterized in that, An inkjet circulation system for a digital printing device according to any one of claims 1-5.

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