An ink suction device for a printing press

Abstract

The present application belongs to the technical field of printing machine, and particularly relates to an ink suction device of a printing machine. The ink suction device comprises an ink cover and an exhaust fan, the exhaust fan is communicated with the ink cover, a plurality of partitions are arranged in the ink cover, air cavities are formed on both sides of the partitions, the air cavities are communicated with the exhaust fan through exhaust holes respectively, a plurality of air inlet holes are arranged on each air cavity and communicated with the outside of the ink cover, an adjusting assembly and a control device are arranged on each exhaust hole, the adjusting assembly and the control device are electrically connected, each air inlet hole, air cavity, adjusting assembly and exhaust hole form an exhaust group, the control device is used for adjusting the cross-sectional area of the exhaust hole, the adjusting assembly comprises a magnetic attraction assembly and a sliding plate, the sliding plate is slidingly connected to the ink cover, and the magnetic attraction assembly is used for adjusting the opening and closing of the sliding plate to the exhaust hole; the negative pressure generated at each part can be adjusted according to the ink drop output of different nozzles on the printing machine.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of printing machines, and particularly relates to an ink gas suction device of a printing machine. BACKGROUND

[0002] An inkjet printer is a kind of printing machine, which prints by mixing various color inks. The inkjet printer can accurately spray a large number of tiny ink droplets (usually only a few picoliters) on the paper to be printed. For color printers, including photo printers, the inkjet method is the mainstream.

[0003] There are mainly two working principles of the inkjet printer: piezoelectric inkjet technology and thermal inkjet technology. The piezoelectric inkjet technology is to place many small piezoelectric ceramics near the nozzle of the print head of the inkjet printer. When a voltage is applied to the piezoelectric ceramics, they will deform, thereby causing the ink in the nozzle to be sprayed, forming a pattern or character. The thermal inkjet technology is to use a thin-film resistor to heat less than 0.5% of the ink in the ink spray area to form a vapor bubble. The vapor bubble expands at an extremely fast speed, forcing the ink droplets to be sprayed from the nozzle, and the sprayed ink forms a pattern or character on the surface of the output medium.

[0004] Since the inkjet printer will form ink gas around the nozzle when spraying ink, the ink gas will accumulate on the nozzle, causing the nozzle to be blocked. A digital printing machine and its ink gas suction device disclosed in Chinese patent CN218749950U include an ink suction box and an air pipe. The ink suction box is internally provided with an inner cavity. The air pipe is arranged on the ink suction box and is connected in communication with the inner cavity at one end. The other end of the air pipe is connected in communication with an exhaust fan, so that the exhaust fan forms a negative pressure in the inner cavity through the air pipe. The surface of the ink suction box is provided with an ink suction hole connected in communication with the inner cavity. The ink suction hole is arranged corresponding to the nozzle, so that the negative pressure at the ink suction hole sucks the ink gas around the nozzle into the inner cavity.

[0005] However, the inkjet printer needs to repeatedly print the same content of the file. For example, when printing a work notebook or a file paper, only the top and bottom or part of the area needs to be printed. Therefore, the number and position of the nozzles of the inkjet printer need to be different, and the amount of ink gas formed around the nozzles is also different. After a long time of ink spraying, the ink gas will accumulate in the ink suction hole corresponding to the position of the nozzle. Since the space in the small printer is limited, a large-sized exhaust fan cannot be arranged. Therefore, only the single working mode of the exhaust fan cannot meet the use. When the nozzle at the position is not in the ink spraying state, the suction force of the ink suction hole at the corresponding position will be wasted. Based on this, an ink gas suction device of a printing machine is provided. SUMMARY

[0006] To solve the above problems in the prior art, the present application provides an ink gas suction device of a printing machine.

[0007] The object of the present application can be achieved by the following technical solutions:

[0008] The ink suction device of the printing machine comprises an ink cover and an exhaust fan, the exhaust fan is communicated with the ink cover, a plurality of partitions are arranged in the ink cover, the edge of each partition is connected with the inner wall of the ink cover, and the two sides of the plane of each partition form air cavities that are isolated from each other, a plurality of air cavities are respectively communicated with the exhaust fan through exhaust holes, a plurality of air inlets are arranged on each air cavity and communicated with the outside of the ink cover, a plurality of adjusting assemblies and control devices are arranged on the exhaust holes, the adjusting assemblies and the control devices are electrically connected, each air inlet, air cavity, adjusting assembly and exhaust hole form an exhaust group, and the control device controls the adjusting assembly to adjust the cross-sectional area of the exhaust hole.

[0009] The partition is a flexible partition, the flexible partition adjusts the cross-sectional area of the air cavity according to the air pressure to assist in adjusting the air flow rate.

[0010] Further, the partition comprises a fixed outer frame and a movable plate, the movable plate is located at the center of the fixed outer frame and is connected with the fixed outer frame through a flexible film, and the movable plate swings on the two sides of the plane of the fixed outer frame with the change of the air pressure.

[0011] Further, the adjusting assembly comprises a magnetic attraction group and a sliding plate, the sliding plate is slidingly connected to the ink cover, the magnetic attraction group is arranged on the edge of the exhaust hole of the ink cover in the sliding direction of the sliding plate, the magnetic attraction group changes the energized state to adjust the magnetic attraction force on the sliding plate, and the magnetic attraction group is used for adjusting the opening and closing of the sliding plate on the exhaust hole.

[0012] Further, the magnetic attraction group comprises two electromagnets, and the two electromagnets are arranged on the two sides of the ink cover in the sliding direction of the sliding plate.

[0013] Further, the magnetic force directions of the two electromagnets of the magnetic attraction group are the same.

[0014] Further, a scraper is arranged on the side of the sliding plate close to the air cavity, the scraper is connected to the inner side of the ink cover and is slidingly attached to the sliding plate.

[0015] Further, the air inlet is a straight slot.

[0016] Further, the bottom of the ink cover is two concave inclined surfaces, and the air inlets are arranged on the two inclined surfaces.

[0017] The present application has the following beneficial effects:

[0018] (1) By providing different negative pressure environment according to different position of ink jet, need to divide several air inlet holes in the ink air cover, each area can adjust the size of negative pressure according to the amount of ink droplet ejection position, so the ink air cover is divided into multiple cavities, the cavities in the ink air cover are separated by the partition, forming multiple exhaust groups, each exhaust group includes a gas cavity, an adjusting assembly and a corresponding exhaust hole, multiple exhaust groups are communicated to the same exhaust fan, in the process of providing negative pressure, each adjusting assembly adjusts the size of the exhaust hole according to the amount of ink droplet ejection, at the same time, cooperate with the change of exhaust fan power to form multiple working modes;

[0019] (2) The partition includes a fixed outer frame and a movable plate, the movable plate is in the center of the fixed outer frame and is connected by a flexible film, the movable plate swings on both sides of the fixed outer frame plane with the change of air pressure; The movable plate and the fixed outer frame are in the same plane under normal conditions, and the flexible film used to connect the movable plate and the fixed outer frame is in a folded state, when the air pressure of one side changes and the air pressure difference appears between the two sides of the gas cavity, the flexible film changes from the folded state to the stretched state, the movable plate swings to the side with lower air pressure, the cross-sectional area of the side is reduced, the gas flow rate of the gas cavity is improved, more ink gas particles are more easily discharged, and accumulation in the gas cavity is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to facilitate those skilled in the art to understand, the present application is further described below in conjunction with the drawings.

[0021] Figure 1 is a schematic diagram of the three-dimensional structure of the present application;

[0022] Figure 2 is a schematic diagram of the side structure of the present application;

[0023] Figure 3 is a schematic diagram of the bottom inclined view of the present application;

[0024] Figure 4 is a schematic diagram of the internal side structure of the ink air cover of the present application;

[0025] Figure 5 is Figure 4 is a local enlarged view of A in the middle.

[0026] Figure 6 is a schematic diagram of the side structure of the flexible film of the partition of the present application in the expanded state;

[0027] Figure 7 is a schematic diagram of the front structure of the partition of the present application.

[0028] Explanation of reference numerals in the attached drawings: 1. Printing assembly; 2. Ink hood; 3. Exhaust fan; 4. Partition; 41. Fixed outer frame; 42. Flexible membrane; 43. Movable plate; 5. Slide plate; 6. Exhaust port; 7. Electromagnet; 8. Air inlet; 9. Air chamber; 10. Printhead. Detailed Implementation

[0029] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0030] like Figures 1-7 As shown, an ink suction device for a printing press according to the present invention includes an ink hood 2 and an exhaust fan 3. The exhaust fan 3 is connected to the ink hood 2. The interior of the ink hood 2 is divided into several air chambers 9 by a partition 4 and is connected to the exhaust fan 3 by exhaust holes 6. Each air chamber 9 is provided with several air inlets 8 that are connected to the outside of the ink hood 2. Each of the several exhaust holes 6 is provided with an adjustment component and a control device. The adjustment component and the control device are electrically connected. Each air chamber 9, the adjustment component and the exhaust hole 6 constitute an exhaust group. The control device controls the adjustment component to adjust the on / off state of the air chamber 9 and the exhaust fan 3.

[0031] Printing presses are divided into black and white printing presses and color printing presses. Color printing presses are generally used to print color patterns. During printing, the print head 10 heats the ink droplets through a heating device inside the print head 10, causing them to expand and be expelled from the print head 10. However, some ink droplets decompose into finer solid and liquid particles after being heated. These particles are much smaller than the ejected ink droplets and tend to adhere to the print head 10 and accumulate, causing the print head 10 to become clogged. Therefore, a negative pressure needs to be created near the print head 10 during the printing process to remove the small particles generated during printing.

[0032] However, since the printheads 10 of the printing press are arranged laterally along its X-axis, and then the printheads 10 are moved along the Y-axis by the transmission mechanism, and ink droplets are ejected during the movement to complete the printing, during the printing of some patterns, the printheads 10 at local positions will continuously eject ink droplets according to the shape of the pattern. As a result, some printheads 10 will eject more ink droplets more frequently, while some printheads 10 will eject fewer ink droplets or not at all. Different ink ejection speeds result in different degrees of influence of negative pressure on the ink droplets. In this case, the existing technology only provides negative pressure through the same negative pressure device, which will result in the same negative pressure output at different positions. When the provided negative pressure is large, although the ink gas in the area with more ink droplets is removed, it will affect the printing effect in the area with fewer ink droplets, causing the ink droplets in the area with fewer ink droplets to deviate. When the provided negative pressure is small, it is not possible to remove all the ink gas.

[0033] Therefore, in order to provide different negative pressure environment according to the ink ejection amount of different positions, the air inlet holes 8 in the ink air cover 2 need to be divided into different zones, and the negative pressure of each zone can be adjusted according to the ink ejection amount of the position. Therefore, the ink air cover 2 is divided into multiple cavities, and the cavities in the ink air cover 2 are separated by the partition plate 4 to form multiple exhaust groups. Each exhaust group includes a gas cavity 9, an adjusting assembly, and a corresponding exhaust hole 6. The multiple exhaust groups are connected to the same exhaust fan 3. During the provision of negative pressure, each adjusting assembly adjusts the size of the exhaust hole 6 according to the amount of ejected ink droplets, and cooperates with the power change of the exhaust fan 3 to form multiple working modes.

[0034] In actual use, the ink air cover 2 and the exhaust fan 3 are electrically connected with the printing assembly 1 on the printing machine, so that the control device of the ink air cover 2 can know the ink droplet output amount of different positions on the printing assembly 1, and then know the amount of ink gas generated at different positions. Then, the adjusting assembly of the exhaust group at the corresponding position is controlled by the control device to adjust the opening size of the exhaust hole 6. When there are both inkjet heads 10 with relatively large ink droplet output amount and inkjet heads 10 with relatively small ink droplet output amount within a certain time, the exhaust fan 3 is operated at high power, and the adjusting device adjusts the size of the exhaust hole 6 according to different positions. The exhaust hole 6 of the exhaust group in the area with relatively large ink droplet output amount is enlarged, and the exhaust hole 6 of the exhaust group in the area with relatively small ink droplet output amount is reduced. Under the exhaust action of the same exhaust fan 3, different negative pressures are formed. When the ink droplet output amount of all inkjet heads 10 is small, all exhaust holes 6 are the same size, and only the exhaust power of the exhaust fan 3 needs to be adjusted. When the ink droplet output amount of all inkjet heads 10 is large, the power of the exhaust fan 3 is increased.

[0035] In order to make the effect of gas pressure adjustment more obvious, the partition plate 4 separating the gas cavities 9 is a flexible memory partition plate 4. The cross-sectional area of the exhaust hole 6 is adjusted by the adjusting assembly to adjust the gas flow rate of the corresponding gas cavity 9 of the different exhaust holes 6. Under the action of different gas flow rates, different negative pressures are formed. Therefore, when there is a gas pressure difference between adjacent gas cavities 9, the side with higher gas pressure will press the side with lower gas pressure. Therefore, the partition plate 4 will swing towards the side with lower gas pressure, reducing the cross-sectional area of the gas cavity 9 on that side and increasing the gas flow rate of the air inlet hole 8 corresponding to that gas cavity 9. Through the characteristic that the partition plate 4 swings with the size of the gas pressure, the adjusting effect on the gas flow rate is improved.

[0036] When the cross-sectional areas of the different exhaust holes 6 are different, the cross-sectional area of the larger exhaust hole 6 has a larger exhaust volume, and the cross-sectional area of the smaller exhaust hole 6 has a smaller exhaust volume. In the initial state, the cross-sectional areas of each air chamber 9 are the same. Therefore, the air chamber 9 with a larger exhaust volume has a faster air flow rate and a smaller pressure, and the air chamber 9 with a smaller exhaust volume has a slower air flow rate and a higher pressure. Therefore, the movable plate 43 moves toward the side with a smaller pressure, so that the cross-sectional area of the air chamber 9 on the side is further reduced, the air flow rate inside the air chamber 9 is further increased, and the adsorption effect on the ink gas is more obvious.

[0037] In an embodiment, the partition plate 4 includes a fixed outer frame 41 and movable plates 43. The movable plates 43 are located at the center of the fixed outer frame 41 and are connected to each other by flexible membranes 42. The movable plates 43 swing on both sides of the plane of the fixed outer frame 41 according to the change in air pressure. The movable plates 43 and the fixed outer frame 41 are in the same plane in the normal state, and the flexible membranes 42 used to connect the movable plates 43 and the fixed outer frame 41 are in a folded state. When the air pressure on one side changes and causes a pressure difference between the two air chambers 9, the flexible membranes 42 change from the folded state to the stretched state, so that the movable plates 43 swing to the side with a lower air pressure, and the cross-sectional area of the side is reduced, thereby increasing the air flow rate of the air chamber 9.

[0038] Because the printing machine has a high speed during printing, the size of the exhaust hole 6 needs to be frequently adjusted according to the ink drop output of the nozzle 10 at different positions. Most of the devices for adjusting the size in the prior art have a complex structure, or the size of the exhaust hole 6 is adjusted by a motor. However, a large number of clicks need to be set, and the ink gas sucked by the exhaust fan 3 is easy to stick to the motor. After a long time of use, the motor is prone to failure and needs to be frequently repaired. Therefore, in order to ensure the stable use of the adjusting assembly, in an embodiment, the adjusting assembly includes a magnetic attraction group and a sliding plate 5. The sliding plate 5 is slidingly connected to the ink gas cover 2, and the magnetic attraction group is arranged on the edge of the exhaust hole 6 of the ink gas cover 2 in the sliding direction of the sliding plate 5. The magnetic attraction group changes the power-on state to adjust the magnetic attraction force on the sliding plate 5, and the magnetic attraction group is used to adjust the opening and closing of the sliding plate 5 to the exhaust hole 6.

[0039] The slide plate 5 is located at the position of the exhaust hole 6 and is in sliding connection with the shell of the ink air cover 2. The ink air cover 2 is provided with a sliding groove matched with the slide plate 5. The magnetic attraction group is located at the edge of the sliding direction of the slide plate 5 on the ink air cover 2. The side close to the magnetic attraction group of the slide plate 5 is provided with a magnet. The magnetic attraction group generates a magnetic attraction force in the energized state. The direction of the magnetic attraction force generated in different current directions is different. The change of the current size will also cause the change of the magnetic attraction force. Therefore, when the structure of the ink air cover 2 is composed of the magnetic attraction group and the slide plate 5, the magnetic attraction force generated by energizing the magnetic attraction group is the same as or opposite to the magnetic attraction direction of the magnet on the slide plate 5 when the size of the exhaust hole 6 needs to be adjusted. When the slide plate 5 needs to be away from the magnetic attraction group to increase the cross-sectional area of the exhaust hole 6, the magnetic attraction force generated by the current passing through the magnetic attraction group is opposite to the magnetic attraction direction of the magnet on the slide plate 5. When the slide plate 5 needs to be close to the magnetic attraction group to reduce or zero the cross-sectional area of the exhaust hole 6, the magnetic attraction force generated by the current passing through the magnetic attraction group is the same as the magnetic attraction direction of the magnet on the slide plate 5. The magnetic attraction group can change the direction of the magnetic attraction force by changing the direction of the current, and can also change the size of the magnetic attraction force by controlling the size of the current, thereby controlling the sliding distance of the slide plate 5 to control the cross-sectional area of the exhaust hole 6. Therefore, in order to control the current of the magnetic attraction group, current regulators and other electrical components for controlling the direction and size of the current need to be provided, or two circuits with different current directions are provided on the magnetic attraction group, and two groups of magnetic attraction groups with different current directions are provided.

[0040] Since only one side of the ink air cover 2 close to the slide plate 5 is provided with the magnetic attraction group in the embodiment, in order to ensure that the slide plate 5 can better realize frequent reciprocating motion to quickly change the size of the cross-sectional area of the exhaust hole 6, a plurality of exhaust holes 6 need to be arranged in a ring shape in sequence, that is, the exhaust passage facing the exhaust fan 3 forms a semi-ring shape. In this structure, the shape of each slide plate 5 is arc-shaped. The sliding groove of the ink air cover 2 in sliding connection with the slide plate 5 is also arc-shaped, and the sliding groove is inclined to make the slide plate 5 subject to the action of gravity on the sliding groove and keep the exhaust hole 6 closed in the non-working state. Under the action of the magnetic attraction force of the same direction of the magnetic attraction group, the exhaust hole 6 can be quickly closed or reduced to change the negative pressure.

[0041] In the above embodiment, the magnetic attraction group is arranged on the ink cover 2 near the edge of the sliding direction of the sliding plate 5, and the magnetic attraction force is changed by the magnetic attraction group to adjust the position of the sliding plate 5. However, when the magnetic attraction group is only arranged on one side edge of the sliding plate 5, only one end of the sliding plate 5 is subjected to force. When the sliding plate 5 is away from the magnetic attraction group, the magnetic attraction group needs to generate a larger magnetic attraction force to attract the sliding plate 5 back. When the sliding plate 5 is close to the magnetic attraction group, a larger reverse magnetic attraction force is needed to push the sliding plate 5 to the far end. Therefore, a larger magnetic attraction force is generated by the magnetic attraction group in this process, which affects the sliding plate 5 of the adjacent exhaust group. Therefore, in order to make the control of the magnetic attraction group on the sliding plate 5 more accurate, and the magnetic attraction groups on the adjacent exhaust groups do not affect each other, in an embodiment, the magnetic attraction group includes two electromagnets 7, and the two electromagnets 7 are arranged on the ink cover 2 on both sides of the sliding direction of the sliding plate 5.

[0042] By arranging the two electromagnets 7 on the magnetic attraction group on both ends of the sliding plate 5 on the ink cover 2, the electromagnets 7 on both sides can exert magnetic attraction force on the sliding plate 5 respectively. Meanwhile, magnets are arranged on both ends of the sliding plate 5 close to the electromagnets 7, so that the distance of the magnetic attraction force generated by the electromagnets 7 is shortened, the reaction of the magnetic attraction force of the electromagnets 7 on the sliding plate 5 is more sensitive, and the two electromagnets 7 simultaneously act on the same sliding plate 5, so that the change speed of the sliding direction of the sliding plate 5 is faster.

[0043] That is, during the process of printing patterns, if only one side of the electromagnet 7 is arranged, when the sliding plate 5 changes from one sliding direction to another sliding direction, the direction of the magnetic attraction force of the electromagnet 7 needs to be changed after the sliding plate 5 is completely slid to the set position corresponding to the ink ejection amount of the nozzle 10. Therefore, when the electromagnet 7 changes the direction of the magnetic attraction force, the sliding plate 5 will be in a state of not being subjected to force for a short time. If the sliding groove is an inclined arc, the sliding plate 5 will automatically slide down under the action of gravity after being slid upward and changing the sliding direction under the action of the electromagnet 7, and the sliding distance is uncontrollable. Therefore, the accuracy of the position adjustment of the sliding plate 5 by only one side of the electromagnet 7 is insufficient, which leads to that the effect of adjusting the negative pressure by changing the cross-sectional area of the exhaust hole 6 through the sliding plate 5 is not obvious enough.

[0044] When the electromagnets 7 are arranged on the ink cover 2 on both sides of the slide plate 5, one electromagnet 7 can keep the original magnetic force direction, and the other electromagnet 7 can change the magnetic force direction, and the magnetic force of the two electromagnets 7 can be changed simultaneously. For example, when the slide plate 5 is sliding upward along the inclined chute, the two electromagnets 7 can generate magnetic force simultaneously or the electromagnet 7 below the slide plate 5 can generate magnetic force in the opposite direction of the slide plate 5 to push the slide plate 5 upward. When the slide plate 5 reaches the predetermined position and needs to change the direction, the electromagnet 7 above the slide plate 5 can generate opposite force, and the magnetic force of the electromagnet 7 above the slide plate 5 can be smaller than the magnetic force of the electromagnet 7 below the slide plate 5. Then, the magnetic force of the electromagnet 7 above the slide plate 5 can gradually increase, and the magnetic force of the electromagnet 7 below the slide plate 5 can gradually decrease. When the magnetic force of the electromagnet 7 above the slide plate 5 is greater than the magnetic force of the electromagnet 7 below the slide plate 5, the slide plate 5 can slide downward. In this process, the slide plate 5 is always affected by the magnetic force, which forms a pushing and pulling effect, ensures the stable sliding of the slide plate 5 on the chute, and improves the accurate control of the sliding position of the slide plate 5.

[0045] In the above embodiment, the magnetic force of the two electromagnets 7 on the slide plate 5 is generated simultaneously when the slide plate 5 changes the direction. When the slide plate 5 continuously slides in one direction, only one electromagnet 7 can generate magnetic force for the movement of the slide plate 5. In one embodiment, the magnetic force directions of the two electromagnets 7 on the magnetic assembly are the same.

[0046] That is, the two electromagnets 7 are in a state of continuously outputting magnetic force, and the magnetic force directions of the two electromagnets 7 are consistent. In the whole process of controlling the sliding of the slide plate 5, the magnetic force of a single electromagnet 7 can be reduced. When the printing machine prints a more complex pattern and needs to change the sliding direction of the slide plate 5 more frequently, the control of the two electromagnets 7 on the slide plate 5 is more flexible and fast. In order to prevent the two electromagnets 7 from changing the magnetic force direction simultaneously, causing the slide plate 5 to be in a short and uncontrolled state when changing the direction, the two electromagnets 7 have a time difference when changing the magnetic force direction. When one electromagnet 7 changes the magnetic force direction, the other electromagnet 7 is still in a state of generating magnetic force. When the magnetic force directions of the two electromagnets 7 are changed, the two electromagnets 7 are in a state of magnetic force in the same direction again.

[0047] Because in the process of absorbing the ink gas through the ink gas cover 2 and the exhaust fan 3, the ink gas is easy to adhere to the inner wall of the ink gas cover 2 when passing through the exhaust passage, and the adhering amount gradually increases and accumulates at the local position after long time use, and the position of the exhaust hole 6 is the only way for the ink gas to be discharged, and the cross-sectional area of the exhaust hole 6 is smaller than that of the air cavity 9, and the slide plate 5 is more easy to adhere to the small particles of the ink gas when adjusting the size of the exhaust hole 6, and because the slide plate 5 is a movable part, it needs to ensure smooth sliding and avoid blockage caused by the accumulation of the small particles of the ink gas, therefore, in an embodiment, a scraper is arranged on the side of the slide plate 5 close to the air cavity 9, and the scraper is connected to the inner side of the ink gas cover 2 and is in sliding fit with the slide plate 5.

[0048] Because the side of the slide plate 5 close to the air cavity 9 contacts the flow path of the ink gas the most, the surface of the slide plate 5 accumulates the most small particles of the ink gas, therefore, when the small particles of the ink gas gradually accumulate and thicken, it is easy to cause the sliding of the slide plate 5 in the sliding groove to be blocked, therefore, a scraper is arranged inside the ink gas cover 2, the accumulated material on the slide plate 5 is scraped off by the scraper, and because the scraper is in sliding fit with the slide plate 5, the scraper can play a scraping role in the reciprocating movement of the slide plate 5 under the magnetic attraction of the electromagnet 7, without moving the scraper, and the scraper can also extend to other positions where the small particles of the ink gas may adhere to the slide plate 5, so that the slide plate 5 can slide smoothly in the sliding groove, and after the small particles of the ink gas are scraped off, they will also be sucked out of the outside under the action of the exhaust fan 3, avoiding accumulation.

[0049] In an embodiment, the air inlet hole 8 is a straight slot.

[0050] Because the nozzle 10 of the printing machine will spray out smaller small particles of the ink gas when spraying out ink droplets, which will diffuse to both sides after colliding with the paper due to the small volume, if the air inlet hole 8 of the ink gas cover 2 is directly aligned with the position of the nozzle 10, the position of the ink droplets sprayed out will be affected under the action of the large negative pressure, therefore, in an embodiment, the bottom of the ink gas cover 2 is two concave inclined surfaces, and the air inlet hole 8 is arranged on the two inclined surfaces.

[0051] By arranging the ink gas cover 2 on the side of the printing assembly 1, and arranging one side of the bottom of the ink gas cover 2 as two upward concave surfaces, and arranging one of the surfaces as an inclined surface facing one side of the printing assembly 1, the ink gas sprayed out from both sides of the printing assembly 1 will be sucked into the air inlet hole 8 on the inclined surface, so that the falling position of the ink droplets will not be affected, and more ink gas can be sucked.

[0052] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, as long as the changes or modifications do not deviate from the technical solution of the present application. Any modification, change, equivalent change and modification of the above embodiments made according to the technical essence of the present application still belong to the scope of the technical solution of the present application.

Claims

1. An ink-absorbing gas device for a printing press, characterized in that: The device includes an ink vapor hood and an exhaust fan. The exhaust fan is connected to the ink vapor hood. The ink vapor hood has several partitions inside. The edge of each partition is connected to the inner wall of the ink vapor hood, and the two sides of its plane form mutually isolated air cavities. The air cavities are connected to the exhaust fan through exhaust holes. Each air cavity is provided with several air inlets that are connected to the outside of the ink vapor hood. Each exhaust hole is provided with an adjustment component and a control device. The adjustment component and the control device are electrically connected. Each air inlet, air cavity, adjustment component, and exhaust hole constitutes an exhaust group. The control device controls the adjustment component to adjust the cross-sectional area of ​​the exhaust hole. The partition is a flexible partition, which swings according to the air pressure to change the cross-sectional area of ​​the air chamber in order to help regulate the gas flow rate.

2. The ink suction device for a printing press according to claim 1, characterized in that: The partition includes a fixed outer frame and a movable plate. The movable plate is located at the center of the fixed outer frame and is connected to each other by a flexible membrane. The movable plate swings on both sides of the plane of the fixed outer frame as the air pressure changes.

3. The ink suction device for a printing press according to claim 1, characterized in that: The adjustment assembly includes a magnetic suction group and a sliding plate. The sliding plate is slidably connected to the ink vapor hood. The magnetic suction group is located on the edge of the sliding plate on the ink vapor hood in the sliding direction. The magnetic suction group changes its power state to adjust the magnetic attraction force on the sliding plate. The magnetic suction group is used to adjust the opening and closing of the exhaust port by the sliding plate.

4. The ink suction device for a printing press according to claim 3, characterized in that: The magnetic attraction assembly includes two electromagnets, which are respectively disposed on both sides of the sliding direction of the slide plate on the ink hood.

5. The ink suction device for a printing press according to claim 4, characterized in that: The magnetic forces of the two electromagnets on the magnetic traction assembly are in the same direction.

6. The ink suction device for a printing press according to claim 5, characterized in that: A scraper is provided on the side of the slide plate near the air chamber. The scraper is connected to the inner side of the ink hood and slides in contact with the slide plate.

7. The ink suction device for a printing press according to claim 1, characterized in that: The air inlet is a straight groove shape.

8. The ink suction device for a printing press according to claim 1, characterized in that: The bottom of the ink hood has two concave inclined surfaces, and the air inlet is located on the two inclined surfaces.

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