Mist ink filtering device and ink-jet printing equipment

Abstract

The utility model belongs to the technical field of ink-jet printing, and particularly relates to a mist ink filtering device and ink-jet printing equipment. The mist ink filtering device comprises an outer main body part which is provided with an air inlet, an air outlet and an airflow channel used for communicating the air inlet with the air outlet, the air inlet is located in the lower portion of the main body part, and the air outlet is located in the upper portion of the main body part. A fan is arranged in an airflow channel between the air inlet and the air outlet; the air inlet support is installed at the air inlet, and a first filtering piece is arranged in the air inlet support; and the air outlet support is installed at the air outlet, and a second filtering piece is arranged in the air outlet support. According to the utility model, the influence of vaporific suspended ink on the nozzle can be eliminated in time.

Description

TECHNICAL FIELD

[0001] The utility model belongs to inkjet printing technical field, and specifically is a misty ink filtering device and inkjet printing equipment. BACKGROUND

[0002] In the working process of the inkjet printing machine, a large amount of misty ink will be suspended around the nozzle, which not only affects the printing effect, but also when the misty ink condenses into ink droplets, it will fall on the printing medium, thereby affecting the quality of the inkjet printing product. In addition, part of the misty ink suspended around the nozzle will adhere to the nozzle, greatly affecting the printing effect of the nozzle, especially in the case of high printing precision requirement, the influence is greater.

[0003] At present, the method of cleaning the nozzle is mainly used to overcome the influence of misty suspended ink, but the inkjet printing machine needs to be stopped when cleaning the nozzle, which will affect the production, and when the nozzle needs to be cleaned, a large amount of ink has been accumulated on the nozzle, which has already affected the printing quality, therefore, the misty ink adhering to the nozzle cannot be cleaned in time at present. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the utility model provides a misty ink filtering device and inkjet printing equipment, which is used for solving the technical problem that the inkjet printing equipment in the prior art cannot clean the misty ink suspended around the nozzle in time, resulting in reduced printing effect.

[0005] In the first aspect, the utility model provides a misty ink filtering device, which comprises:

[0006] A main body part is provided with an air inlet, an air outlet and an air flow channel for connecting the air inlet and the air outlet, the air inlet is located at the lower part of the main body part, the air outlet is located at the upper part of the main body part, and a fan is arranged in the air flow channel between the air inlet and the air outlet;

[0007] An air inlet support is installed at the air inlet, and a first filter is arranged in the air inlet support;

[0008] An air outlet support is installed at the air outlet, and a second filter is arranged in the air outlet support.

[0009] Preferably, the air inlet support and the main body part are detachably connected, the main body part is provided with a first guide structure, and the first guide structure is used for restricting the moving direction of the air inlet support relative to the main body part, and / or the air outlet support and the main body part are detachably connected, the main body part is provided with a second guide structure, and the second guide structure is used for restricting the moving direction of the air outlet support relative to the main body part.

[0010] Preferably, the fan is a vortex fan.

[0011] Preferably, the first filter has a larger air resistance than the second filter.

[0012] Preferably, the first filter comprises a first filter layer, a second filter layer and a third filter layer arranged in sequence along the air inlet path, and each of the first filter layer, the second filter layer and the third filter layer is provided with filter holes, and the pore sizes of the first filter layer, the second filter layer and the third filter layer decrease in sequence.

[0013] Preferably, the porosities of the first filter layer, the second filter layer and the third filter layer decrease in sequence, and / or the thicknesses of the filter holes of the first filter layer, the second filter layer and the third filter layer increase in sequence.

[0014] Preferably, the filter holes in the same filter layer are hexagonally distributed, and the filter holes in adjacent two rows are staggered.

[0015] Preferably, the filter holes of a previous filter layer and the filter holes of a subsequent filter layer are staggered in the projection on a reference plane in the gas flow path, and the reference plane is a plane perpendicular to the axial direction of the filter holes.

[0016] In a second aspect, the present application further provides an inkjet printing device comprising a printing module and the misty ink filter device of the first aspect, and the printing module comprises a nozzle, and the misty ink filter device is located at the front side or the rear side of the printing module in the reciprocating direction.

[0017] Preferably, the height of the air inlet is greater than or equal to the height of the printing nozzle plane.

[0018] Beneficial effects: The misty ink filter device and the inkjet printing device utilize the fan installed in the air flow channel of the misty ink filter device to perform air extraction, and generate an air flow flowing from the air inlet at the lower part of the misty ink filter device to the air outlet at the upper part. Under the driving of the foregoing flowing air flow, the misty suspended ink around the nozzle is sucked into the filter device at the air inlet, and flows along the air flow channel from the air inlet to the air outlet. These misty inks will pass through the first filter arranged at the air inlet position and the second filter arranged at the air outlet position in sequence in the flowing process. The first filter performs the first filtration on the misty suspended ink in the air flow, and after absorbing part of the suspended ink, the second filter performs the filtration on the remaining misty suspended ink before the air flow flows out. After the foregoing double filtration, the misty suspended ink around the nozzle is fully absorbed. Since the misty ink filter device of the present application can continuously absorb and filter the misty suspended ink around the nozzle at any time, the misty suspended ink around the nozzle can be timely eliminated, and the printing quality will not be affected, and the process of absorbing and filtering the misty suspended ink around the nozzle by the misty ink filter device can be independently performed, and does not need to be processed after the printing device is stopped, so the production efficiency of the inkjet printing device is also high. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this utility model.

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the mist ink filtration device of this utility model;

[0021] Figure 2 This is an exploded structural diagram of the mist ink filtration device of this utility model;

[0022] Figure 3 This is a partial view of the connection between the air inlet bracket and the main body in the mist-like ink filter device of this utility model;

[0023] Figure 4 This is a partial view of the connection between the air outlet bracket and the main body in the mist-like ink filter device of this utility model;

[0024] Figure 5 This is a three-dimensional structural diagram of the printing module of this utility model.

[0025] The components and their numbers shown in the picture:

[0026] Printing module 1, mist ink filter device 2, main body 21, air inlet 211, air outlet 212, fan 22, air inlet bracket 23, first filter element 24, air outlet bracket 25, second filter element 26, first vertical plate 27, first bending part 271, second vertical plate 28, second bending part 281, third vertical plate 291, third bending part 292, fourth vertical plate 293, printhead 3, bolt hole 4. Detailed Implementation

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely in combination with the embodiments of the present application. It should be noted that, in this document, relationship terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device. Without more limitations, the elements defined by the phrase "include" do not exclude the presence of additional identical elements in the process, method, article or device that includes the elements. If there is no conflict, the embodiments of the present application and various features in the embodiments can be combined with each other, and all within the scope of protection of the present application.

[0028] Embodiment 1

[0029] As shown in Figure 1 and Figure 2 The present embodiment provides a misty ink filtering device 2, which mainly comprises a main body part 21, an air inlet support 23, a first filter 24, an air outlet support 25 and a second filter 26.

[0030] The main body part 21 is provided with an air inlet 211, an air outlet 212 and an air flow channel for connecting the air inlet 211 and the air outlet 212, the air inlet 211 is located at the lower part of the main body part 21, the air outlet 212 is located at the upper part of the main body part 21, and the air flow channel between the air inlet 211 and the air outlet 212 is provided with a fan 22;

[0031] When the mist ink filtering device 2 is in operation, the fan 22 is started to make the air flow in the air flow channel from the air inlet 211 to the air outlet 212. The suction force generated by the air flow can suck the mist ink floating around the inkjet head 3 from the air inlet 211 and make it flow with the air flow to the air outlet 212. Since the air inlet 211 is located at the lower part of the main body 21, it is more conducive to absorbing the mist ink floating around the inkjet head 3. Since the air outlet 212 is located at the upper part of the main body 21, the air flow discharged will not adversely affect the inkjet printing. The fan 22 in the embodiment can be a vortex fan 22 to reduce the space occupied by the fan 22.

[0032] As shown in Figure 1 , the air inlet support 23 in the embodiment is installed at the air inlet 211. As shown in Figure 2 , the air inlet support 23 is provided with a first filter 24. The ink floating in the air is first filtered by the first filter 24 after being sucked into the air inlet 211, and the ink in the air is absorbed when passing through the first filter 24. The material of the first filter 24 can be a hydrophilic material such as sponge to enhance the absorption capacity of the water-based mist ink.

[0033] The air outlet support 25 in the embodiment is installed at the air outlet 212, and the air outlet support 25 is provided with a second filter 26. The air filtered by the first filter 24 flows to the air outlet position, and the air is filtered again by the second filter 26 at the air outlet before being discharged.

[0034] As shown in Figure 2As shown, the mist ink filtering device 2 of the embodiment can use the fan 22 installed in the air flow channel of the mist ink filtering device 2 to perform air suction, and generate an air flow flowing from the air inlet 211 at the lower part of the mist ink filtering device 2 to the air outlet 212 at the upper part. Under the driving of the foregoing flowing air flow, the mist ink suspended around the nozzle 3 is sucked into the filtering device at the air inlet 211 and flows along the air flow channel from the air inlet 211 to the air outlet 212. The mist ink will pass through the first filtering member 24 arranged at the position of the air inlet 211 and the second filtering member 26 arranged at the position of the air outlet 212 in sequence during the flowing process. The first filtering member 24 performs the first filtering on the mist ink suspended in the air flow, and the second filtering member 26 performs the filtering on the remaining mist ink suspended again before the air flow flows out. After the foregoing double filtering, the mist ink suspended around the nozzle 3 is fully absorbed. Since the mist ink filtering device 2 of the present application can continuously absorb and filter the mist ink suspended around the nozzle 3 at any time, the mist ink suspended around the nozzle 3 can be eliminated in time, and the printing quality will not be affected. Moreover, the process of absorbing and filtering the mist ink suspended around the nozzle 3 by the mist ink filtering device 2 can be performed independently, and the printing equipment does not need to be stopped for processing, so the production efficiency of the inkjet printing equipment is also high.

[0035] As shown in the drawings, Figure 2 In the embodiment, the air inlet support 23 is detachably connected with the main body part 21, and the main body part 21 is provided with a first guide structure, and the air inlet support 23 in the detached state can move relative to the main body part 21 along the guide direction of the first guide structure.

[0036] As shown in the drawings, Figure 2 and Figure 3 In specific implementation, bolt holes 4 can be arranged at the corresponding positions of the end of the air inlet support 23 and the main body part 21, and the air inlet support 23 can be fixed on the main body part 21 by bolts passing through the bolt holes 4 after installation. When the bolts for fixation are detached, the air inlet support 23 can be pulled and moved on the main body part 21 along the guide direction of the first guide structure, so as to quickly and accurately detach and install the air inlet support 23. The first guide structure includes a first bent part 271 formed by horizontally bending a first vertical plate member 27 of the main body part 21 and a second bent part 281 formed by horizontally bending a second vertical plate member 28 of the main body part 21, and the air inlet support 23 is pulled and moved in the area defined by the first vertical plate member 27, the second vertical plate member 28, the first bent part 271 and the second bent part 281.

[0037] The air outlet support 25 is detachably connected to the main body part 21, and the main body part 21 is provided with a second guide structure, and the air outlet support 25 in the detached state can move relative to the main body part 21 along the guide direction of the second guide structure.

[0038] As shown in Figure 2 and Figure 4 In actual implementation, bolt holes 4 can be arranged at the end of the air outlet support 25 and the corresponding position of the main body part 21, and the air outlet support 25 can be fixed to the main body part 21 by bolts passing through the bolt holes 4 after installation. When the bolts for fixation are removed, the air outlet support 25 can be pulled and moved along the guide direction of the second guide structure on the main body part 21, so that the air outlet support 25 can be quickly and accurately detached and installed. The second guide structure includes a third bending part 292 formed by horizontally bending a third vertical plate part 291 of the main body part 21 and a fourth vertical plate part 293 of the main body part 21, and the air outlet support 25 is pulled and moved in the area defined by the third vertical plate part 291, the fourth vertical plate part 293 and the third bending part 292.

[0039] As an example, in the embodiment, the air resistance of the first filter part 24 is greater than that of the second filter part 26. Since the air resistance of the first filter part 24 for filtering during air intake is greater than that of the second filter part 26 for filtering during air outlet, the first filter part 24 can more fully absorb flying ink during air intake. The second filter part 26 adopts a relatively small air resistance during air outlet to ensure that air is discharged in time, avoiding high pressure in the fan cavity affecting the intake of external air from the air inlet 211.

[0040] In the embodiment, the first filter part 24 includes a first filter layer, a second filter layer and a third filter layer arranged in sequence along the air intake path, and the first filter layer, the second filter layer and the third filter layer are all provided with filter holes, and the pore sizes of the first filter layer, the second filter layer and the third filter layer decrease in sequence.

[0041] In the embodiment, a larger pore size is adopted in the first filter layer to capture large particles first, a medium pore size is adopted in the second filter layer to capture particles of medium size, and a smaller pore size is adopted in the third filter layer to further capture the finest particles. The filter structure with the foregoing decreasing pore sizes can improve the filtering efficiency, achieve better filtering effect and prolong the service life of the filter layer.

[0042] For example, the pore size of the first filter layer can be set to 5 microns, the pore size of the second filter layer can be set to 3 microns, and the pore size of the third filter layer can be set to 1 micron.

[0043] In specific applications, the pore size of each filter layer can be adjusted according to the size of the target pollutants, and the spacing distance between each filter layer can also be optimized according to the flow rate requirement.

[0044] In this embodiment, the porosity of the first filter layer, the second filter layer and the third filter layer decreases in turn. After adopting the foregoing structure, the porosity of the filter layer decreases with the depth, thereby further improving the capture efficiency of the filter.

[0045] In this embodiment, the thickness of the first filter layer, the second filter layer and the third filter layer increases in turn. After adopting the foregoing structure, the thickness of each filter layer in the first filter 24 increases with the depth, which can increase the contact time of the first filter 24 with the pollutants, so that the gas flow can be fully contacted with the pollutants in the process of flowing through the first filter 24, thereby improving the filtering effect.

[0046] In this embodiment, the filter holes in the same filter screen layer are hexagonally distributed, and the adjacent two rows of filter holes are staggered. After adopting the foregoing arrangement, the filter holes in the same filter screen layer form a plum blossom shape arrangement, which can maximize the coverage area of the effective filtering area and reduce the missed area, thereby further improving the capture rate of the misty ink.

[0047] In this embodiment, the projections of the filter holes of the previous filter layer and the filter holes of the subsequent filter layer on the reference plane are staggered, and the reference plane is a plane perpendicular to the axial direction of the filter holes.

[0048] Since the projections of the filter holes of the adjacent two filter layers in the vertical direction are staggered in this embodiment, a zigzag-shaped gas flow channel can be formed in the first filter 24, so that the gas flow meanders in the filter layer, increasing the contact area and time of the gas flow with the filter layer, thereby further improving the capture rate.

[0049] Since the gas flow must turn in the gas flow channel formed by the staggered filter holes of the previous and subsequent filter layers, the chances of collision between the particulate matters and each filter layer and being captured by the filter layer are also significantly increased, and the gas flow pressure is also reasonably dispersed, thereby making the gas flow pressure distribution more uniform. In addition, by adopting the multi-layer staggered arrangement of the filter holes, the gas flow can also pass through other adjacent channels in the case of some channel blockage, and the embodiment can therefore effectively avoid the problem of overall filtering efficiency reduction caused by single-point blockage.

[0050] The material of each filter layer can be selected from materials with hydrophilic properties, thereby increasing the probability of capturing ink particles. The material of the filter layer includes but is not limited to sponge, polyurethane foam, non-woven fabric, glass fiber filter paper and ceramic filter material.

[0051] Embodiment 2

[0052] The embodiment also provides an inkjet printing device, which comprises a printing module 1 and the misty ink filtering device 2 as described in the embodiment 1, as shown in the figure, the printing module 1 comprises a nozzle 3, and the misty ink filtering device 2 is located at the front side or the rear side of the reciprocating movement direction of the printing module 1. Figure 5

[0053] The nozzle 3 is installed on the printing module 1, and the printing module 1 can drive the nozzle 3 to do linear reciprocating movement along the preset direction under the driving of the driving mechanism. Since the misty ink filtering device 2 is located at the front side or the rear side of the reciprocating movement direction of the printing module 1, the misty ink filtering device 2 can timely and sufficiently absorb the flying ink around the nozzle 3 in the printing process of the reciprocating movement of the printing module 1, thereby improving the ink absorption efficiency.

[0054] Since the misty ink filtering device 2 generates air flow around the nozzle 3 when working, the air flow can affect the flight trajectory of the ink jetted by the nozzle 3, thereby affecting the printing quality. In the embodiment, the height of the air inlet 211 is greater than or equal to the height of the printing nozzle 3 plane. In this way, the influence of the air flow generated by the misty ink filtering device 2 on the flight trajectory of the ink can be minimized.

[0055] The above description is only a specific implementation of the present application, and those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, module and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be described here. It should be understood that the protection scope of the present application is not limited to this, and any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application.​

Claims

1. A mist-like ink filter device, characterized in that, include: The main body is provided with an air inlet, an air outlet, and an airflow channel for connecting the air inlet and the air outlet. The air inlet is located at the lower part of the main body, and the air outlet is located at the upper part of the main body. A fan is provided in the airflow channel between the air inlet and the air outlet. An air intake bracket is installed at the air intake, and a first filter element is provided in the air intake bracket; An air outlet bracket is installed at the air outlet, and a second filter element is provided in the air outlet bracket.

2. The mist-like ink filter device according to claim 1, characterized in that, The air inlet bracket is detachably connected to the main body. The main body is provided with a first guide structure, which is used to constrain the direction of movement of the air inlet bracket relative to the main body. And / or the air outlet bracket is detachably connected to the main body. The main body is provided with a second guide structure, which is used to constrain the direction of movement of the air outlet bracket relative to the main body.

3. The mist-like ink filter device according to claim 2, characterized in that, The fan is a vortex fan.

4. The mist-like ink filter device according to claim 1, characterized in that, The air resistance of the first filter element is greater than that of the second filter element.

5. The mist-like ink filter device according to any one of claims 1 to 4, characterized in that, The first filter element includes a first filter layer, a second filter layer, and a third filter layer arranged sequentially along the air inlet path. Each of the first filter layer, the second filter layer, and the third filter layer is provided with filter holes, and the pore size of the filter holes in the first filter layer, the second filter layer, and the third filter layer decreases sequentially.

6. The mist-like ink filter device according to claim 5, characterized in that, The porosity of the first filter layer, the second filter layer, and the third filter layer decreases sequentially and / or the thickness of the first filter layer, the second filter layer, and the third filter layer increases sequentially.

7. The mist-like ink filter device according to claim 5, characterized in that, The filter holes in the same layer of filter screen are hexagonal in shape, and the adjacent rows of filter holes are staggered.

8. The mist-like ink filter device according to claim 5, characterized in that, In the gas flow path, the filter holes of the previous filter layer and the filter holes of the next filter layer are staggered in projection onto a reference plane, which is a plane perpendicular to the axial direction of the filter holes.

9. An inkjet printing device, characterized in that, The invention includes a printing module and a mist ink filter device according to any one of claims 1 to 8, wherein the printing module includes a printhead and the mist ink filter device is located on the front or rear side of the printing module in the reciprocating direction of the printing module.

10. The inkjet printing apparatus according to claim 9, characterized in that, The height of the air inlet is greater than or equal to the height of the print head plane.

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