Adsorption system, discharging mechanism and printer

Abstract

The utility model provides an adsorption system, a discharging mechanism and a printer, the printer comprises a printing device and a discharging mechanism, the discharging mechanism is used for conveying a medium printed by the printing device to a next process, and the discharging mechanism comprises a mounting frame and the adsorption system; the adsorption system comprises a suction cup, a vacuum generator used for providing negative pressure for the suction cup to enable the suction cup to adsorb a medium and a first gas source used for providing positive pressure gas for the suction cup to enable the suction cup to release the medium. The adsorption system further comprises a valve assembly, the valve assembly has a first state and a second state, when the valve assembly is in the first state, the vacuum generator can communicate with the suction cup, and when the valve assembly is in the second state, the first air source can communicate with the suction cup. The adsorption system comprises a plurality of suction cups arranged in parallel, and the suction cups are arranged on the mounting frame at intervals. Negative pressure in the suction cup can be quickly eliminated, the suction cup can quickly release media, and the media are prevented from inclining and floating.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of printing, and more particularly relates to an adsorption system, a feeding mechanism and a printer. BACKGROUND

[0002] A flatbed printer is a multifunctional printing device which can print on various different media, including flat media and three-dimensional objects. In order to realize the carrying of the media, the carrying of the media can be realized by the adsorption of a suction cup. Specifically, a valve is connected between a vacuum generator and the suction cup, and the on-off of the vacuum generator and the suction cup is controlled by the valve. However, when the media needs to be released, although the valve has been closed, there is still negative pressure remaining in the suction cup, which causes the media to not be able to fall quickly. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the embodiment of the application is to provide an adsorption system, a feeding mechanism and a printer, so as to solve the technical problem that the media cannot fall quickly when the suction cup releases the media in the prior art.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows: in a first aspect, the application provides an adsorption system, comprising a suction cup, a vacuum generator for providing negative pressure for the suction cup so that the suction cup adsorbs media, and a first gas source for providing positive pressure gas for the suction cup so that the suction cup releases the media; the adsorption system further comprises a valve assembly, the valve assembly has a first state and a second state, the valve assembly can make the vacuum generator communicate with the suction cup when the valve assembly is in the first state, and the valve assembly can make the first gas source communicate with the suction cup when the valve assembly is in the second state.

[0005] In some embodiments, the valve assembly is connected with the first gas source and the vacuum generator respectively, the suction cup is connected with the valve assembly and the vacuum generator respectively, the first gas source communicates with the vacuum generator through the valve assembly when the valve assembly is in the first state, and the first gas source communicates with the suction cup through the valve assembly when the valve assembly is in the second state.

[0006] In some embodiments, the valve assembly comprises a double-electronic-control two-position five-way electromagnetic valve, the double-electronic-control two-position five-way electromagnetic valve comprises a first gas inlet, a first gas outlet and a second gas outlet, the first gas inlet communicates with the first gas source, the first gas outlet communicates with the suction cup after passing through the vacuum generator, and the second gas outlet directly communicates with the suction cup.

[0007] In some embodiments, the adsorption system further comprises a first gas path, a second gas path and a third gas path, the first gas path is connected between the first gas outlet and the vacuum generator, the second gas path is connected between the vacuum generator and the suction cup; the third gas path is in communication with the second gas outlet, and the third gas path, the second gas path and the suction cup are respectively connected with a first three-way valve.

[0008] In some embodiments, a connecting gas path is connected between the first three-way valve and the suction cup, and the connecting gas path is provided with an on-off valve.

[0009] In some embodiments, the valve assembly comprises a first control valve and a second control valve, the first control valve is used to control the on-off state of the vacuum generator and the suction cup, the second control valve is used to control the on-off state of the first gas source and the suction cup, and the vacuum generator is connected with a second gas source.

[0010] In some embodiments, the adsorption system further comprises a gas cylinder for driving the suction cup to lift, and the gas cylinder is connected to the first gas source through an electromagnetic valve.

[0011] In some embodiments, the electromagnetic valve is a two-position three-way electromagnetic valve, a double-electric control two-position five-way electromagnetic valve or a single-electric control two-position five-way electromagnetic valve.

[0012] In some embodiments, the adsorption system further comprises a gas cylinder for driving the suction cup to lift, and the gas cylinder is connected to the first gas source through an electromagnetic valve.

[0013] In some embodiments, the adsorption system is provided with an on-off valve corresponding to each suction cup, and the on-off valve is arranged at least between the vacuum generator and the suction cup.

[0014] In some embodiments, the adsorption system is provided with an on-off valve corresponding to each suction cup, and the on-off valve is arranged at least between the vacuum generator and the suction cup.

[0015] The adsorption system, the feeding mechanism and the printer provided by the present application have the following beneficial effects: the vacuum generator and the first gas source are used to respectively provide negative pressure and positive pressure gas for the suction cup, and the valve assembly is used to control the communication state of the vacuum generator and the first gas source with the suction cup, so that when the medium needs to be adsorbed, the vacuum generator can be used to provide negative pressure for the suction cup to adsorb the medium, when the medium needs to be released, the vacuum generator is closed, the first gas source is connected with the suction cup through the valve assembly, and the first gas source is used to provide positive pressure gas for the suction cup to quickly eliminate the negative pressure in the suction cup, so that the medium can be quickly released by the suction cup, and the medium can be prevented from tilting and drifting. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0017] Figure 1 A perspective view of a printer provided in the embodiments of the present application is shown.

[0018] Figure 2 A structural view of a mounting frame and an adsorption system in a blanking mechanism provided in the embodiments of the present application is shown.

[0019] Figure 3 A gas circuit principle view of the adsorption system provided in the embodiments of the present application is shown.

[0020] Figure 4 A structural view of a double-electronic-control two-position five-way electromagnetic valve in the adsorption system provided in the embodiments of the present application is shown.

[0021] Figure 5 A structural view of a single-electronic-control two-position five-way electromagnetic valve in the adsorption system provided in the embodiments of the present application is shown.

[0022] Figure 6 An assembly view of the mounting frame, the air cylinder and the suction cup in the blanking mechanism provided in the embodiments of the present application is shown.

[0023] Figure 7 A gas circuit principle view of the adsorption system provided in another embodiment of the present application is shown.

[0024] In the drawings, various reference signs represent:

[0025] 1, blanking mechanism; 100, adsorption system; 110, suction cup; 120, vacuum generator; 130, first air source; 140, valve assembly; 141, double-electronic-control two-position five-way electromagnetic valve; 1411, first air inlet; 1412, first air outlet; 1413, second air outlet; 1414, first air exhaust; 1415, second air exhaust; 142, first control valve; 143, second control valve; 150, first gas circuit; 160, second gas circuit; 170, third gas circuit; 180, first three-way valve; 190, fourth gas circuit; 200, on-off valve; 210, air cylinder; 211, first cavity; 212, second cavity; 220, single-electronic-control two-position five-way electromagnetic valve; 221, second air inlet; 222, third air outlet; 223, third air exhaust; 230, second three-way valve; 240, fifth gas circuit; 250, sixth gas circuit; 260, connecting gas circuit; 270, second air source; 280, mounting frame; 2, printing device; 3, cutting device. DETAILED DESCRIPTION

[0026] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0027] It should be noted that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0030] As described in the background, in order to realize the carrying of the medium, the carrying of the medium can be realized by the way of suction by the suction cup. Specifically, by connecting a valve between the vacuum generator and the suction cup, the on-off of the vacuum generator and the suction cup is controlled by the valve. However, when the medium needs to be released, although the valve has been closed, there is still negative pressure in the suction cup, which causes the medium to not be able to fall quickly. In addition, when the medium needs to be adsorbed by multiple suction cups, the positions of the medium corresponding to each suction cup are different, so that the distances from each suction cup to the vacuum generator are different, and the adsorption weights of each suction cup corresponding to different positions of the medium are also different. When the vacuum generator stops working, the negative pressures of each suction cup disappear at different speeds, causing the medium to appear a slanting falling phenomenon when it falls down.

[0031] To solve the above problems, the embodiment of the present application provides an adsorption system 100, a feeding mechanism 1 and a printer. When the medium needs to be released, the suction cup 110 is disconnected from the vacuum generator 120, and the suction cup 110 is communicated with the first gas source 130, the suction cup 110 is supplied with gas through the first gas source 130, the residual negative pressure in the suction cup 110 is quickly eliminated, so that the medium can quickly fall down, and the phenomenon of slanting and floating when the medium falls down is avoided.

[0032] Please refer to Figure 1 The printer provided by the embodiment of the present application will be described. The printer comprises a printing device 2 and a feeding mechanism 1, the feeding mechanism 1 is used for conveying the medium printed by the printing device 2 to the next process, for example, but not limited to, a cutting process, that is, conveying to a cutting device 3. The printing device 2 can be a flatbed printer or an inkjet printer or other types of printing devices 2.

[0033] In some embodiments, please refer to Figure 2 The feeding mechanism 1 comprises a mounting frame 280 and an adsorption system 100, the adsorption system 100 comprises a plurality of suction cups 110 arranged in parallel with each other, each suction cup 110 is arranged at intervals on the mounting frame 280 and is used for adsorbing the medium respectively. In this way, the plurality of suction cups 110 can adsorb the medium respectively, so as to ensure the stability of adsorbing the medium.

[0034] Please refer to Figure 2 and Figure 3 The adsorption system 100 provided by the embodiment of the present application will be described. The adsorption system 100 is used for realizing the adsorption and release of the medium, wherein the medium can be a printing medium in the printing device 2, and the medium can also be other sheet-shaped structures, for example, a thin plate.

[0035] The adsorption system 100 comprises a suction cup 110, a vacuum generator 120, a first gas source 130 and a valve assembly 140. The vacuum generator 120 is used for providing negative pressure for the suction cup 110 to adsorb the medium, the first gas source 130 is used for providing positive pressure gas for the suction cup 110 to release the medium; the valve assembly 140 has a first state and a second state, when the valve assembly 140 is in the first state, the vacuum generator 120 can be communicated with the suction cup 110; when the valve assembly 140 is in the second state, the first gas source 130 can be communicated with the suction cup 110.

[0036] The adsorption system 100 in the embodiment of the present application provides negative pressure for the suction cup 110 through the vacuum generator 120 and provides positive pressure gas for the suction cup 110 through the first gas source 130, and simultaneously controls the communication state of the vacuum generator 120 and the first gas source 130 with the suction cup 110 through the valve assembly 140, so that when the medium needs to be adsorbed, the vacuum generator 120 can provide negative pressure for the suction cup 110 to adsorb the medium, when the medium needs to be released, the vacuum generator 120 is closed, and the first gas source 130 is communicated with the suction cup 110 through the valve assembly 140, and the suction cup 110 is provided with positive pressure gas through the first gas source 130 to quickly eliminate the negative pressure in the suction cup 110, so that the medium is quickly released from the suction cup 110, and the medium is prevented from tilting and drifting.

[0037] In the present application, the vacuum generator 120 needs to rely on a gas source to supply gas when forming a vacuum, which can directly supply gas through the first gas source 130 or through an additional gas source.

[0038] Specifically, as an example, refer to Figure 3 The valve assembly 140 is connected with the first gas source 130 and the vacuum generator 120, and the suction cup 110 is connected with the valve assembly 140 and the vacuum generator 120. When the valve assembly 140 is in the first state, the first gas source 130 is communicated with the vacuum generator 120 through the valve assembly 140, and when the valve assembly 140 is in the second state, the first gas source 130 is communicated with the suction cup 110 through the valve assembly 140. In this embodiment, the communication between the first gas source 130 and the vacuum generator 120 can be formed through the valve assembly 140, so that an additional gas source does not need to be additionally arranged for the vacuum generator 120.

[0039] In addition, in the present application, the valve assembly 140 can also disconnect the communication between the vacuum generator 120 and the suction cup 110 when the valve assembly 140 is in the second state. Alternatively, in other embodiments, the valve assembly 140 can be switched to the second state when the medium needs to be released, and the vacuum generator 120 is closed.

[0040] In some embodiments, refer to Figure 3 and Figure 4 The valve assembly 140 includes a double-electronic-control two-position five-way electromagnetic valve 141, which includes a first gas inlet 1411, a first gas outlet 1412 and a second gas outlet 1413. The first gas inlet 1411 is communicated with the first gas source 130, the first gas outlet 1412 is communicated with the suction cup 110 after passing through the vacuum generator 120, and the second gas outlet 1413 is directly communicated with the suction cup 110.

[0041] Specifically, the double-electronic-control two-position five-way electromagnetic valve 141 further comprises a first exhaust port 1414 and a second exhaust port 1415. When the medium needs to be adsorbed, the valve assembly 140 is switched to the first state, at this time, the first inlet port 1411 is communicated with the first gas source 130, the first outlet port 1412 is communicated with the suction cup 110 through the vacuum generator 120, the second outlet port 1413 is communicated with the second exhaust port 1415, and the first exhaust port 1414 is blocked. At this time, the vacuum generator 120 can form negative pressure gas by using the positive pressure gas provided by the first gas source 130 to vacuumize the suction cup 110, so that the suction cup 110 can adsorb the medium.

[0042] When the medium needs to be released, the valve assembly 140 is switched to the second state, at this time, the first inlet port 1411 is communicated with the first gas source 130, the second outlet port 1413 is directly communicated with the suction cup 110, the first outlet port 1412 is communicated with the first exhaust port 1414, and the second exhaust port 1415 is blocked. At this time, the suction cup 110 can be directly provided with positive pressure gas by the first gas source 130 to offset the negative pressure of the suction cup 110, so that the suction cup 110 can quickly release the medium.

[0043] In summary, in the embodiment, one double-electronic-control two-position five-way electromagnetic valve 141 can realize switching the communication state of the vacuum generator 120 and the suction cup 110, and switching the communication state of the first gas source 130 and the suction cup 110, that is, switching the positive pressure and the negative pressure at the suction cup 110, so that the suction cup 110 can quickly realize the adsorption and release of the medium, and the double-electronic-control two-position five-way electromagnetic valve 141 has simple structure and simple control, is easy to obtain, and reduces the cost of the adsorption system 100.

[0044] In some embodiments, please refer to Figure 3 and Figure 4The adsorption system 100 further comprises a first gas path 150, a second gas path 160 and a third gas path 170. The first gas path 150 is connected between the first gas outlet 1412 and the vacuum generator 120. The second gas path 160 is connected between the vacuum generator 120 and the suction cup 110. The third gas path 170 is in communication with the second gas outlet 1413. The second gas path 160, the third gas path 170 and the suction cup 110 are respectively connected with the first three-way valve 180. Through the first gas path 150 and the second gas path 160, the double-electronic two-position five-way electromagnetic valve 141, the vacuum generator 120 and the suction cup 110 are connected, so that the vacuum generator 120 can be used to vacuumize the suction cup 110. Through the third gas path 170 and the first three-way valve 180, the second gas outlet 1413 of the double-electronic two-position five-way electromagnetic valve 141 can be directly connected with the suction cup 110, so that the suction cup 110 can be supplied with positive pressure gas. It can be understood that in other embodiments of the present application, the third gas path 170 can also be directly connected with the suction cup 110, and in this case, the first three-way valve 180 can not be provided, which is not limited herein.

[0045] In some embodiments, the suction cups 110 are connected in parallel, and the adsorption system 100 is provided with the on-off valve 200 corresponding to each suction cup 110, and the on-off valve 200 is arranged between the vacuum generator 120 and the suction cup 110. The on-off valve 200 is used to control the connection between the vacuum generator 120 and the suction cup 110. When the adsorption system 100 is not needed to adsorb the medium, the on-off valve 200 can be used to disconnect the vacuum generator 120 and the suction cup 110, so that even if the vacuum generator 120 is turned on, the negative pressure will not be generated at the suction cup 110. In this embodiment, the on-off valve 200 is arranged corresponding to each suction cup 110, so that the suction cups 110 can work independently. The number of the suction cups 110 can be selected according to the actual area of the medium, and the working suction cups 110 can be selected.

[0046] In some embodiments, referring to Figure 3 The first three-way valve 180 is connected with the suction cup 110 through a connecting gas path 260, and the connecting gas path 260 is provided with the on-off valve 200. Through the on-off valve 200 arranged in the connecting gas path 260, the connection between the suction cup 110 and the vacuum generator 120 can be controlled. In addition, when there are multiple suction cups 110, multiple connecting gas paths 260 can be arranged in parallel, and the on-off valves 200 are arranged in the connecting gas paths 260 respectively, and the suction cups 110 are connected with the connecting gas paths 260, so that the parallel connection of the multiple suction cups 110 and the multiple on-off valves 200 is realized, and the double-electronic two-position five-way electromagnetic valve 141, the first gas path 150, the second gas path 160 and the third gas path 170 are not affected, so that the overall structure of the adsorption system 100 is simple.

[0047] Specifically, a plurality of first three-way valves 180 can be provided, each of which is connected with the second gas path 160, the third gas path 170 and one connecting gas path 260, so as to realize the parallel connection of the connecting gas paths 260.

[0048] In some embodiments, referring to Figure 3 , the adsorption system 100 further comprises a fourth gas path 190 connected between the first gas source 130 and the first inlet 1411 of the double-electronic-control two-position five-way electromagnetic valve 141, so as to realize the communication between the first gas source 130 and the double-electronic-control two-position five-way electromagnetic valve 141.

[0049] In some embodiments, referring to Figure 7 , the valve assembly 140 can also not be provided with the double-electronic-control two-position five-way electromagnetic valve 141, but be controlled by two control valves. Specifically, the valve assembly 140 comprises a first control valve 142 and a second control valve 143, the first control valve 142 being used to control the on-off of the vacuum generator 120 and the suction cup 110, and the second control valve 143 being used to control the on-off of the first gas source 130 and the suction cup 110, the vacuum generator 120 being connected with a second gas source 270. Specifically, in the first state, the first control valve 142 controls the communication between the vacuum generator 120 and the suction cup 110, the second control valve 143 controls the disconnection between the first gas source 130 and the suction cup 110, and the second gas source 270 is used to provide compressed gas for the vacuum generator 120, so that the suction cup 110 can be pumped to negative pressure by the vacuum generator 120, to realize the adsorption of the medium by the suction cup 110. In the second state, the first control valve 142 controls the disconnection between the vacuum generator 120 and the suction cup 110, and the second control valve 143 controls the communication between the first gas source 130 and the suction cup 110, so that the suction cup 110 can be supplied with gas by the first gas source 130, to enable the suction cup 110 to quickly release the medium.

[0050] Optionally, the first control valve 142 comprises a first electromagnetic valve, which is used to control the on-off of the vacuum generator 120 and the suction cup 110. In other embodiments, a flow valve can also be used to control the on-off of the gas path.

[0051] Optionally, the second control valve 143 comprises a second electromagnetic valve, which is used to control the on-off of the first gas source 130 and the suction cup 110. In other embodiments, a flow valve can also be used to control the on-off of the gas path.

[0052] In some embodiments, referring to Figure 3 and Figure 6, the adsorption system 100 further comprises a pneumatic cylinder 210 for driving the suction cup 110 to lift, the pneumatic cylinder 210 is connected to the first air source 130 through an electromagnetic valve. Specifically, the pneumatic cylinder 210 is controlled to intake and exhaust air through energization and de-energization of the electromagnetic valve, so as to realize the extension and retraction of the pneumatic cylinder 210, thereby realizing the lifting drive of the suction cup 110.

[0053] In some embodiments, referring to Figure 5 , the electromagnetic valve is a single-control two-position five-way electromagnetic valve 220, which has a second air inlet 221, two third air outlets 222 and two third air exhausts 223, and the pneumatic cylinder 210 has a first cavity 211 and a second cavity 212. When the single-control two-position five-way electromagnetic valve 220 is energized, the internal valve core moves so that the second air inlet 221 is in communication with one of the third air outlets 222, and the other third air outlet 222 is in communication with the third air exhaust 223. At this time, compressed air enters the first cavity 211 of the pneumatic cylinder 210 through the second air inlet 221, pushes the piston to move to one side, thereby driving the extension of the pneumatic cylinder 210. When the single-control two-position five-way electromagnetic valve 220 is de-energized, the valve core returns to the original position under the action of the spring, so that the second air inlet 221 is in communication with the second cavity 212 of the pneumatic cylinder 210, the first cavity 211 of the pneumatic cylinder 210 is in communication with the third air exhaust 223, the first cavity 211 of the pneumatic cylinder 210 exhausts, the second cavity 212 of the pneumatic cylinder 210 intakes, and the piston is pushed to move in the opposite direction, realizing the retraction of the pneumatic cylinder 210. In this embodiment, the single-control two-position five-way electromagnetic valve 220 is normally de-energized, so that the pneumatic cylinder 210 is in the retracted state, so that the suction cup 110 is in the retracted state; when the medium needs to be adsorbed, the single-control two-position five-way electromagnetic valve 220 is energized, so that the single-control two-position five-way electromagnetic valve 220 is in the energized state, so that the pneumatic cylinder 210 extends to push the suction cup 110 to extend. Understandably, in other embodiments of the present application, the above-mentioned electromagnetic valve can also be a two-position three-way electromagnetic valve or a double-control two-position five-way electromagnetic valve, as long as it can control the intake and exhaust of the pneumatic cylinder 210 through energization and de-energization, which is not limited here.

[0054] In some embodiments, referring to Figure 3, the adsorption system 100 further comprises a second three-way valve 230, a sixth gas path 250 and a fifth gas path 240, three interfaces of the second three-way valve 230 are connected with the sixth gas path 250, the fifth gas path 240 and the fourth gas path 190 respectively, one end of the sixth gas path 250 away from the second three-way valve 230 is connected with the first gas source 130, and one end of the fifth gas path 240 away from the second three-way valve 230 is in communication with the second gas inlet 221. The above arrangement makes the cylinder 210 and the suction cup 110 share the first gas source 130. It can be understood that in other embodiments of the present application, a fourth gas source can also be additionally arranged under the condition of permission, and then the fourth gas source is connected with the second gas inlet 221 of the single electric control two-position five-way electromagnetic valve 220, which is not uniquely limited here.

[0055] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Adsorption system, characterized in that The adsorption system comprises a suction disc, a vacuum generator for providing negative pressure to the suction disc to enable the suction disc to adsorb medium, and a first gas source for providing positive pressure gas to the suction disc to enable the suction disc to release the medium; the adsorption system further comprises a valve assembly having a first state and a second state, the valve assembly, in the first state, is capable of enabling the vacuum generator to communicate with the suction disc, and the valve assembly, in the second state, is capable of enabling the first gas source to communicate with the suction disc.

2. The adsorption system of claim 1, wherein, The valve assembly is connected with the first gas source and the vacuum generator respectively, and the suction disc is connected with the valve assembly and the vacuum generator respectively; when the valve assembly is in the first state, the first gas source communicates with the vacuum generator through the valve assembly; and when the valve assembly is in the second state, the first gas source communicates with the suction disc through the valve assembly.

3. The adsorption system of claim 1, wherein, The valve assembly comprises a double-electronic-control two-position five-way electromagnetic valve, which comprises a first gas inlet, a first gas outlet and a second gas outlet; the first gas inlet communicates with the first gas source; the first gas outlet communicates with the suction disc after passing through the vacuum generator; and the second gas outlet directly communicates with the suction disc.

4. The adsorption system of claim 3, wherein, The adsorption system further comprises a first gas path, a second gas path and a third gas path; the first gas path is connected between the first gas outlet and the vacuum generator; the second gas path is connected between the vacuum generator and the suction disc; and the third gas path communicates with the second gas outlet; the third gas path, the second gas path and the suction disc are respectively connected with a first three-way valve.

5. The adsorption system of claim 4, wherein, A connecting gas path is connected between the first three-way valve and the suction disc, and the connecting gas path is provided with an on-off valve.

6. The adsorption system of claim 1, wherein, The valve assembly comprises a first control valve and a second control valve; the first control valve is used to control the on-off of the vacuum generator and the suction disc; the second control valve is used to control the on-off of the first gas source and the suction disc; and the vacuum generator is connected with a second gas source.

7. The adsorption system of any one of claims 1 to 6, wherein, The adsorption system further comprises a gas cylinder for driving the suction disc to ascend and descend, and the gas cylinder is connected with the first gas source through an electromagnetic valve.

8. The blanking mechanism characterized by, The adsorption system comprises a mounting frame and the adsorption system according to any one of claims 1 to 7; the adsorption system comprises a plurality of suction discs arranged in parallel, each of the suction discs is arranged at intervals on the mounting frame and is used to adsorb the medium respectively.

9. The blanking mechanism of claim 8, wherein, The adsorption system is provided with an on-off valve corresponding to each of the suction discs, and the on-off valve is arranged at least between the vacuum generator and the suction disc.

10. Printer, characterized in that The blanking mechanism according to claim 8 or 9 is used to convey the medium printed by the printing device to the next process.

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