Scraper module control mechanism and screen printing machine

Abstract

The utility model relates to a scraper module control mechanism. The scraper module control mechanism comprises a control module and a moving module, the control module comprises an air cylinder, a first air path and a second air path; a first cavity and a second cavity are formed in the air cylinder, the first air channel is used for controlling air to enter and exit from the first cavity, and the second air channel is used for controlling air to enter and exit from the second cavity; the moving module comprises a fixed seat and a connecting piece; the scraper module is fixedly connected to the fixing base, one end of the connecting piece is fixedly connected with the fixing base, and the other end of the connecting piece is connected with the output end of the air cylinder. According to the scraper module control mechanism, the position of the scraper module can be firmly fixed, so that the scraper module is suspended at a target position, and the phenomena that printing ink of a printing pattern is too much or partially lacks due to vertical movement during printing operation and parts are damaged due to falling of the scraper in a shutdown state are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of printing, in particular to a control mechanism for a squeegee module and a screen printing machine. Background Art

[0002] Screen printing technology is a traditional printing technology, which is widely used in various industries. With the rapid development of China's industry, especially the electronics industry, the demand for printing increases accordingly, and the requirement for printing accuracy is also getting higher and higher. Therefore, it is necessary to accurately control each component of the screen printing machine. Among them, the squeegee is in direct contact with the screen printing plate and transfers the ink through the screen printing plate to the printing object. Therefore, the control of the position of the squeegee in the vertical direction and its stability are crucial for high-quality printing. At present, the screen printing machine can move the squeegee up and down in the vertical direction to adapt to printing objects at different heights. However, when the squeegee is adjusted to the current position, it is prone to displacement in the vertical direction, resulting in too much or too little force applied when printing the object, causing too much ink or partial absence of the printed pattern; at the same time, when the printing machine stops, the squeegee needs to be moved above the screen frame. After a long time, the squeegee may fall, causing damage to the screen plate or other components. Summary of the Utility Model

[0003] Based on this, the purpose of the present utility model is to provide a control mechanism for a squeegee module. By setting a control module, a cylinder and two air paths are arranged in the control module. The two air paths respectively control the air intake and exhaust of two chambers in the cylinder. At the same time, a moving module is set. The output end of the cylinder controls the movement of the squeegee module through the moving module, so that the squeegee module can move up and down in the vertical direction. And when the squeegee module moves to the target position, the position of the squeegee module can be firmly fixed by controlling the air pressure of the two chambers of the cylinder, so that the squeegee module hovers at the target position, avoiding too much ink or partial absence of the printed pattern caused by vertical movement during printing operations, and damage to components caused by the fall of the squeegee during the shutdown state.

[0004] Another purpose of the present utility model is to provide a screen printing machine. By setting a control module, a cylinder and two air paths are arranged in the control module. The two air paths respectively control the air intake and exhaust of two chambers in the cylinder. At the same time, a moving module is set. The output end of the cylinder controls the movement of the squeegee module through the moving module, so that the squeegee module can move up and down in the vertical direction. And when the squeegee module moves to the target position, the position of the squeegee module can be firmly fixed by controlling the air pressure of the two chambers of the cylinder, so that the squeegee module hovers at the target position, avoiding too much ink or partial absence of the printed pattern caused by vertical movement during printing operations, and damage to components caused by the fall of the squeegee during the shutdown state, thereby improving the stability and printing quality of the screen printing machine.

[0005] A control mechanism for a squeegee module includes:

[0006] A control module, a scraper module, and a moving module;

[0007] The control module includes a cylinder, a first air passage, and a second air passage; a first chamber and a second chamber are provided inside the cylinder, the first air passage is used to control the entry and exit of gas into and from the first chamber, and the second air passage is used to control the entry and exit of gas into and from the second chamber;

[0008] The moving module includes a fixed seat and a connecting member; the scraper module is fixedly connected to the fixed seat, one end of the connecting member is fixedly connected to the fixed seat, and the other end is connected to the output end of the cylinder.

[0009] Further, the control module further includes a ventilation switch;

[0010] The ventilation switch is provided with a first input port, a first output port, a second input port, and a second output port; the first chamber is provided with a first gas outlet, and the second chamber is provided with a second gas outlet; the first input port and the second input port are connected to the gas source; the first output port is connected to the first gas outlet, and the second output port is connected to the second gas outlet.

[0011] Further, the first air passage is provided with a first exhaust valve; the second air passage is provided with a second exhaust valve;

[0012] The input end of the first exhaust valve is connected to the first output port, and the output end is connected to the first gas outlet; the input end of the second exhaust valve is connected to the second output port, and the output end is connected to the second gas outlet.

[0013] Further, the first air passage is further provided with a first pressure regulating valve; the second air passage is further provided with a second pressure regulating valve;

[0014] The first pressure regulating valve is arranged on the pipeline between the gas source and the first input port;

[0015] The second pressure regulating valve is arranged on the pipeline between the second output port and the second exhaust valve.

[0016] Further, it further includes: a mounting module;

[0017] The mounting module includes a first mounting plate, a second mounting plate, and a third mounting plate; the first mounting plate and the third mounting plate are respectively located on both sides of the second mounting plate and are both connected to the second mounting plate;

[0018] The first mounting plate is parallel to the second mounting plate, and the third mounting plate is perpendicular to the second mounting plate.

[0019] Further, the moving module is further provided with a sliding connection structure;

[0020] The sliding connection structure includes a slide rail and a slider. The slide rail is disposed on the third mounting plate, and the slider is slidably connected to the slide rail; the fixed seat is fixedly connected to the slider.

[0021] Further, the fixed seat is provided with a first fixing plate and a second fixing plate. The first fixing plate is horizontally disposed, and the second fixing plate is vertically connected to the first fixing plate;

[0022] One side of the second fixing plate facing away from the squeegee module is fixedly connected to the slider.

[0023] Further, the sliding direction of the slider on the slide rail is perpendicular to the first fixing plate and parallel to the second fixing plate.

[0024] Further, the air cylinder is fixedly connected to one side of the first mounting plate facing the second mounting plate, and the first exhaust valve and the second exhaust valve are fixedly connected to one side of the first mounting plate facing away from the second mounting plate;

[0025] The air vent switch, the first pressure regulating valve and the second pressure regulating valve are fixedly connected to one side of the second mounting plate facing the first mounting plate.

[0026] Meanwhile, the present application also provides a screen printing machine, including the squeegee module control mechanism of the present utility model.

[0027] The beneficial effects of the present utility model are as follows:

[0028] (1) By providing a control module, an air cylinder and two air paths are provided in the control module. The two air paths respectively control the air intake and exhaust of the two chambers in the air cylinder. Meanwhile, a moving module is provided. The output end of the air cylinder controls the movement of the squeegee module through the moving module, so that the squeegee module can move up and down in the vertical direction. And when the squeegee module moves to the target position, the position of the squeegee module can be firmly fixed by controlling the air pressure of the two chambers of the air cylinder, so that the squeegee module hovers at the target position, avoiding excessive ink or partial loss of the printed pattern due to vertical movement during printing operation, and damage to components caused by the fall of the squeegee under the shutdown state;

[0029] (2) By providing an air vent switch including two input ports and two output ports, the air pressure in the first chamber and the second chamber can be conveniently controlled to control the axial movement and stop of the piston along the air cylinder, so that the squeegee module reaches the target position and is fixed;

[0030] (3) A first pressure regulating valve and a second pressure regulating valve are provided on the first air path and the second air path to regulate the pressure of the gas entering the cylinder, preventing the air pressure in the first chamber or the second chamber from increasing sharply, which may cause the piston in the cylinder to move too fast and damage the components due to the excessive moving speed of the scraper module;

[0031] (4) A first exhaust valve and a second exhaust valve are provided in the first air path and the second air path. When the position of the scraper needs to be fixed, while introducing gas into one of the air paths, the exhaust valve of the other air path can be used for exhaust to quickly balance the forces on both sides of the piston in the cylinder;

[0032] At the same time, by adjusting the exhaust volume of the first exhaust valve or the second exhaust valve, the air pressures in the first chamber and the second chamber are precisely controlled to more accurately control the air pressure on the piston in the cylinder, thereby better fixing the position of the piston;

[0033] (5) By providing a slide rail and a slider and connecting the scraper module to the slider, while further enhancing the stable connection of the scraper module, the up and down movement of the scraper module becomes smoother.

[0034] For better understanding and implementation, the present utility model will be described in detail below with reference to the accompanying drawings. Description of the Drawings

[0035] Figure 1 It is the installation structure diagram of the scraper module control mechanism provided in this embodiment;

[0036] Figure 2 It is the installation exploded view of the scraper module control mechanism provided in this embodiment;

[0037] Figure 3 It is the connection schematic diagram of the control module provided in this embodiment.

[0038] In the figure: 1 - air source; 10 - control module; 11 - cylinder; 111 - first chamber; 111a - first air inlet; 112 - second chamber; 112a - second air inlet; 12 - first air path; 121 - first exhaust valve; 122 - first pressure regulating valve; 13 - second air path; 131 - second exhaust valve; 132 - second pressure regulating valve; 14 - air supply switch; 141 - first input port; 142 - first output port; 143 - second input port; 144 - second output port; 20 - moving module; 21 - fixed seat; 211 - first fixing plate; 212 - second fixing plate; 22 - connecting piece; 231 - slide rail; 232 - slider; 30 - installation module; 31 - first installation plate, 32 - second installation plate; 33 - third installation plate; 40 - scraper module; 41 - scraper; 42 - horizontal adjustment plate. Detailed Embodiment

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical direction", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or a connection through an intermediate medium. It can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0042] Please also refer to Figures 1 to 3 , the embodiment of the present application provides a control mechanism for a scraper module, which relates to a gas source 1 and includes a control module 10, a moving module 20, an installation module 30, and a scraper module 40. The installation module 30 is used to install the control module 10 and the moving module 20, and the control module 10 controls the movement, fixation, and hovering of the scraper module 40 through the moving module 20.

[0043] Specifically, the control module 10 includes a cylinder 11, a first air passage 12, and a second air passage 13. A piston is provided inside the cylinder 11. The piston abuts against the inner wall of the cylinder 11, dividing the inner cavity of the cylinder 11 into a first chamber 111 and a second chamber 112. One side of the piston is provided with an output rod. One end of the output rod is connected to the piston, and the other end protrudes from the cylinder 11 and is connected to the moving module 20. The output rod can move along the axial direction of the cylinder 11 with the piston, thereby controlling the moving module 20 to move along the axial direction of the cylinder 11. The input end of the first air passage 12 is connected to the air source 1, and the output end is connected to communicate with the first chamber 111; the input end of the second air passage 13 is connected to the air source 1, and the output end is connected to communicate with the second chamber 112. Thus, the first air passage 12 can control the gas to enter and exit the first chamber 111, and the second air passage 13 can control the gas to enter and exit the second chamber 112. It can be understood that in order to realize the gas transmission between the air source 1 and the first chamber 111 and the second chamber 112, both the first air passage 12 and the second air passage 13 at least include one gas transmission pipeline.

[0044] Further, in order to better control the on-off of the first air passage 12 and the second air passage 13, the control module 10 further includes an air vent switch 14. The air vent switch 14 is provided with a first input port 141, a first output port 142, a second input port 143, and a second output port 144. At the same time, the first chamber 111 is provided with a first gas transmission port 111a, and the second chamber 112 is provided with a second gas transmission port 112a; both the first input port 141 and the second input port 143 are communicated with the air source 1; the first output port 142 is communicated with the first gas transmission port 111a, and the second output port 144 is communicated with the second gas transmission port 112a. In this embodiment, in order to more intelligently control the on-off of the air source 1 of the first air passage 12 and the second air passage 13, the air vent switch 14 is preferably an electromagnetic valve. By providing the air vent switch 14 including two input ports and two output ports, the air pressure in the first chamber 111 and the second chamber 112 can be conveniently controlled to control the piston to move and stop along the axial direction of the cylinder 11, so that the scraper module 40 reaches the target position and is fixed.

[0045] Further, the first air passage 12 is provided with a first exhaust valve 121, and the second air passage 13 is provided with a second exhaust valve 131. The input end of the first exhaust valve 121 is connected to the first output port 142, and the output end is connected to the first gas transmission port 111a; the input end of the second exhaust valve 131 is connected to the second output port 144, and the output end is connected to the second gas transmission port 112a. When it is necessary to fix the position of the scraper module 40, while introducing gas into one of the air passages, the other air passage can be exhausted through the first exhaust valve 121 or the second exhaust valve 131, so that the forces on both sides of the piston in the cylinder 11 can reach balance as soon as possible.

[0046] Preferably, the first exhaust valve 121 and the second exhaust valve 131 are exhaust throttle valves, which can control the exhaust volume by adjusting the size of the exhaust switch. When the air pressure difference between the first chamber 111 and the second chamber 112 is small, the exhaust volume of the first exhaust valve 121 or the second exhaust valve 131 is reduced to finely adjust the air pressure in the first chamber 111 and the second chamber 112, so as to more precisely control the air pressure in the first chamber 111 and the second chamber 112, balance the forces on both sides of the piston, and thus better fix the position of the piston. It can be understood that a flow channel is provided inside the first exhaust valve 121 and the second exhaust valve 131, and gas can normally flow through the flow channel when its exhaust switch is closed. When its exhaust switch is opened, the gas flowing through the flow channel will be discharged.

[0047] Furthermore, in order to adjust the pressure of the gas entering the cylinder 11 and prevent the air pressure in the first chamber 111 or the second chamber 112 from increasing sharply, resulting in an excessive increase in the moving speed of the piston and causing damage to surrounding components due to the excessive moving speed of the scraper module 40, a first pressure regulating valve 122 is also provided in the first air path 12, and a second pressure regulating valve 132 is also provided in the second air path 13. The first pressure regulating valve 122 is arranged on the pipeline between the air source 1 and the first input port 141, and the second pressure regulating valve 132 is arranged on the pipeline between the second output port 144 and the second exhaust valve 131. Thus, when the first chamber 111 needs to be ventilated, the first input port 141 is opened. At this time, the air source 1 passes through the first pressure regulating valve 122, adjusts the air pressure to the working air pressure of the cylinder 11, and enters the first chamber 111 through the ventilation switch 14 and the first exhaust valve 121. When the second chamber 112 needs to be ventilated, the second input port 143 is opened. At this time, the air source 1 sequentially flows through the ventilation switch 14 and the second pressure regulating valve 132, adjusts the air pressure to the working air pressure of the cylinder 11, and then enters the second chamber 112 through the second exhaust valve 131. It should be noted that the second pressure regulating valve 132 can also be arranged on the pipeline between the air source 1 and the second input port 143.

[0048] The moving module 20 includes a fixed seat 21 and a connecting member 22. The scraper module 40 is fixedly connected to the fixed seat 21. One end of the connecting member 22 is fixedly connected to the fixed seat 21, and the other end is connected to the end of the output rod of the cylinder 11 away from the piston. Specifically, the fixed seat 21 is provided with a first fixing plate 211 and a second fixing plate 212. The first fixing plate 211 is horizontally arranged, and the second fixing plate 212 is vertically connected to the first fixing plate 211. Preferably, one end of the second fixing plate 212 is vertically connected to one end of the first fixing plate 211. At this time, the cross-sections of the first fixing plate 211 and the second fixing plate 212 are in an "L" shape. The output rod is fixedly connected to one side of the first fixing plate 211, and the scraper module 40 is fixedly connected to both the first fixing plate 211 and the second fixing plate 212.

[0049] The blade module 40 is provided with a blade 41 and a horizontal adjusting plate 42. When the blade module 40 is fixedly connected to the fixed seat 21, the blade 41 is arranged at one end of the blade module 40 away from the fixed seat 21, the horizontal adjusting plate 42 is fixedly connected to the surface of the first fixing plate 211 facing away from the output rod, and the side surface of the blade module 40 is connected to the second fixing plate 212.

[0050] The installation module 30 includes a first installation plate 31, a second installation plate 32 and a third installation plate 33. The first installation plate 31 and the third installation plate 33 are respectively located on both sides of the second installation plate 32 and are both connected to the second installation plate 32. Specifically, the first installation plate 31 is parallel to the second installation plate 32 and is connected to the second installation plate 32 through multiple columns. One end of the third installation plate 33 is vertically connected to the second installation plate 32. Preferably, one end of the third installation plate 33 is connected to the middle position of one side surface of the second installation plate 32. Thus, the third installation plate 33 divides one side of the second installation plate 32 into two regions. The blade module 40 is arranged in one of the regions, and the region opposite to the blade module 40 is used for installing the ink return blade module, which will not be elaborated here. The cylinder 11 is fixedly connected to the side of the first installation plate 31 facing the second installation plate 32, the first exhaust valve 121 and the second exhaust valve 131 are fixedly connected to the side of the first installation plate 31 facing away from the second installation plate 32, and the air vent switch 14, the first pressure regulating valve 122 and the second pressure regulating valve 132 are fixedly connected to the side of the second installation plate 32 facing the first installation plate 31.

[0051] Furthermore, in order to further enhance the stable connection of the blade module 40 and make the movement of the blade module 40 in the vertical direction smoother. The moving module 20 is also provided with a sliding connection structure. The sliding connection structure includes a slide rail 231 and a slider 232. The slide rail 231 is arranged on the side surface of the third installation plate 33 facing the blade module 40, the slider 232 is slidably connected to the slide rail 231, and the fixed seat 21 is fixedly connected to the slider 232. Specifically, the side surface of the second fixing plate 212 facing away from the blade module 40 is fixedly connected to the slider 232. In this embodiment, since the blade module 40 needs to move in the vertical direction, the track direction of the slide rail 231 is perpendicular to the first fixing plate 211 and parallel to the second fixing plate 212, so that the sliding direction of the slider 232 on the slide rail 231 is perpendicular to the first fixing plate 211 and parallel to the second fixing plate 212.

[0052] The working principle of the blade module control mechanism is as follows: When starting the printing operation, the blade 41 needs to move downward. First, the first input port 141 is opened, and the gas flowing out of the gas source 1 passes through the first pressure regulating valve 122, the air vent switch 14, and the first exhaust valve 121 and reaches the first chamber 111. The air pressure in the first chamber 111 is greater than the air pressure in the second chamber 112, pushing the piston to move in the direction of the blade module 40, thereby driving the connecting member 22 and the fixing base 21 to move in the direction of the blade module 40, and finally driving the blade module 40 to move vertically downward so that the blade 41 reaches the target position above the stencil. When the blade 41 reaches the predetermined target position, it needs to be fixed at this position. At this time, the first input port 141 is closed, the gas source 1 of the first air path 12 is cut off, and the first exhaust valve 121 is opened for exhaust. The air in the first chamber 111 is slowly exhausted. At the same time, the second input port 143 is opened to connect the gas source 1, and the gas passes through the air vent switch 14, the second pressure regulating valve 132, and the second exhaust valve 131 and enters the second chamber 112 until the forces on both sides of the piston in the cylinder 11 are equal. When the forces on both sides of the piston are equal, the second input port 143 is closed to stop supplying air to the second chamber 112, and the first exhaust valve 121 is closed to stop exhaust. When stopping the printing operation, the blade 41 needs to move upward. First, the first input port 141 is closed, the gas source 1 of the first air path 12 is cut off, and the first exhaust valve 121 is opened for exhaust. The air in the first chamber 111 is exhausted. At the same time, the second input port 143 is opened to connect the gas source 1, and the gas passes through the air vent switch 14, the second pressure regulating valve 132, and the second exhaust valve 131 and enters the second chamber 112 until the air pressure in the second chamber 112 is greater than the air pressure in the first chamber 111. The air pressure in the second chamber 112 pushes the piston to move in the direction away from the blade module 40. When the blade 41 reaches a certain position and needs to hover, the second input port 143 is closed, the gas source 1 on the second air path 13 is cut off, and the second exhaust valve 131 is opened for exhaust. The air in the second chamber 112 is slowly exhausted. At the same time, the first input port 141 is opened to connect the gas source 1, and the gas passes through the first pressure regulating valve 122, the air vent switch 14, and the first exhaust valve 121 and enters the first chamber 111 until the forces on both sides of the piston in the cylinder 11 are equal, realizing the hovering of the blade 41.

[0053] It can be understood that the forces on both sides of the piston in the cylinder 11 include not only the gas pressure but also the elastic force of the spring, the gravity of the piston, etc., which will not be elaborated here. In short, by controlling the air pressures in the first chamber 111 and the second chamber 112, the total force on the piston is finally made zero so that the piston remains stationary, thereby realizing the vertical position fixation of the blade module 40 and hovering at a certain position.

[0054] Meanwhile, the present application also provides a screen printing machine, including the blade module control mechanism described in the present utility model.

[0055] Compared with the prior art, the beneficial effects of the technical solution of the present application are as follows:

[0056] (1) By setting a control module, a cylinder and two air paths are arranged in the control module. The two air paths respectively control the air inlet and outlet of the two chambers in the cylinder. At the same time, a moving module is set. The output end of the cylinder controls the movement of the scraper module through the moving module, so that the scraper module can move up and down in the vertical direction. And when the scraper module moves to the target position, the position of the scraper module can be firmly fixed by controlling the air pressure of the two chambers of the cylinder, so that the scraper module hovers at the target position, avoiding excessive ink or partial loss of the printed pattern due to vertical movement during printing operations, and damage to components caused by the scraper falling in the shutdown state;

[0057] (2) By setting an air vent switch including two input ports and two output ports, the air pressure in the first chamber and the second chamber can be conveniently controlled to control the piston to move axially along the cylinder and stop, so that the scraper module reaches the target position and is fixed;

[0058] (3) A first pressure regulating valve and a second pressure regulating valve are arranged on the first air path and the second air path to adjust the pressure of the gas entering the cylinder, avoiding damage to components caused by too large a moving speed of the piston in the cylinder due to a sharp increase in the air pressure in the first chamber or the second chamber, resulting in too large a moving speed of the scraper module;

[0059] (4) A first exhaust valve and a second exhaust valve are arranged in the first air path and the second air path. When the position of the scraper needs to be fixed, while introducing gas into one of the air paths, the exhaust valve of the other air path can be used for exhaust, so that the forces on both sides of the piston in the cylinder reach balance as soon as possible;

[0060] At the same time, by adjusting the exhaust volume of the first exhaust valve or the second exhaust valve, the air pressure in the first chamber and the second chamber is accurately controlled to more precisely control the air pressure received by the piston in the cylinder, so as to better fix the position of the piston;

[0061] (5) By setting a slide rail and a slider, and connecting the scraper module to the slider, while further increasing the stable connection of the scraper module, the up and down movement of the scraper module is made smoother.

[0062] The above embodiments only represent several implementation manners of the present utility model, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and the present utility model also intends to include these modifications and deformations.

Claims

1. A scraper module control mechanism, involving an air source, characterized in that: include: Control module, scraper module and moving module; The control module includes a cylinder, a first gas path and a second gas path; a first chamber and a second chamber are provided inside the cylinder, the first gas path is used to control the gas to enter and exit the first chamber, and the second gas path is used to control the gas to enter and exit the second chamber; The moving module comprises a fixing seat and a connecting piece; the scraper module is fixedly connected to the fixing seat, one end of the connecting piece is fixedly connected to the fixing seat, and the other end is connected to the output end of the cylinder.

2. The scraper module control mechanism according to claim 1, characterized in that: The control module also includes a ventilation switch; The ventilation switch is provided with a first input port, a first output port, a second input port and a second output port; the first chamber is provided with a first gas delivery port, and the second chamber is provided with a second gas delivery port; the first input port and the second input port are connected to the gas source; the first output port is connected to the first gas delivery port, and the second output port is connected to the second gas delivery port.

3. The scraper module control mechanism according to claim 2, characterized in that: The first gas circuit is provided with a first exhaust valve; the second gas circuit is provided with a second exhaust valve; The input end of the first exhaust valve is connected to the first output port, and the output end is connected to the first gas supply port; the input end of the second exhaust valve is connected to the second output port, and the output end is connected to the second gas supply port.

4. The scraper module control mechanism according to claim 3, characterized in that: The first gas circuit is further provided with a first pressure regulating valve; the second gas circuit is further provided with a second pressure regulating valve; The first pressure regulating valve is arranged on the pipeline between the gas source and the first input port; The second pressure regulating valve is arranged on the pipeline between the second output port and the second exhaust valve.

5. The scraper module control mechanism according to claim 4, characterized in that: Also includes: Install the module; The mounting module includes a first mounting plate, a second mounting plate and a third mounting plate; the first mounting plate and the third mounting plate are respectively located on both sides of the second mounting plate and are both connected to the second mounting plate; The first mounting plate is parallel to the second mounting plate, and the third mounting plate is perpendicular to the second mounting plate.

6. The scraper module control mechanism according to claim 5, characterized in that: The mobile module is also provided with a sliding connection structure; The sliding connection structure comprises a sliding rail and a sliding block, wherein the sliding rail is arranged on the third mounting plate, and the sliding block is slidably connected to the sliding rail; and the fixing seat is fixedly connected to the sliding block.

7. The scraper module control mechanism according to claim 6, characterized in that: The fixing seat is provided with a first fixing plate and a second fixing plate, the first fixing plate is arranged horizontally, and the second fixing plate is vertically connected to the first fixing plate; The side of the second fixing plate facing away from the scraper module is fixedly connected to the sliding block.

8. The scraper module control mechanism according to claim 7, characterized in that: The sliding direction of the sliding block on the sliding rail is perpendicular to the first fixing plate and parallel to the second fixing plate.

9. The scraper module control mechanism according to any one of claims 5 to 8, characterized in that: The cylinder is fixedly connected to a side of the first mounting plate facing the second mounting plate, and the first exhaust valve and the second exhaust valve are fixedly connected to a side of the first mounting plate facing away from the second mounting plate; The ventilation switch, the first pressure regulating valve and the second pressure regulating valve are fixedly connected to a side of the second mounting plate facing the first mounting plate.

10. A screen printing machine, characterized in that: It comprises the scraper module control mechanism described in any one of claims 1-9.

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