A printing plate water squeezing device and its water squeezing method

Abstract

The present invention discloses a water squeezing device for printing plates and a water squeezing method thereof, which relates to the technical field of printing plates. The device includes a base, on the upper surface of which a box body is fixedly connected. A collection box is arranged on the right side of the box body. Through holes are formed on the surface of the box body. A conveyor belt is arranged on the inner wall of the box body through two rotating rods. A plurality of water leakage holes are formed on the surface of the conveyor belt. The two rotating rods are fixedly connected to the inner wall of the box body for shaft rotation. This water squeezing device for printing plates can complete the movement of the printing plates through the conveyance of the conveyor belt. Through the two-time extrusion by the first water squeezing roller and the second water squeezing roller, and the two-time drying by the spray head, the water squeezing effect on the printing plates is improved, and the water squeezing operation of the printing plates can be effectively completed with good water squeezing effect. Moreover, during the water squeezing operation of the printing plates, the first water squeezing roller and the second water squeezing roller can be deflected and pressed against the printing plates at the same time to adapt to the water squeezing operation of printing plates with different thicknesses and sizes.

Description

Technical Field

[0001] The present invention relates to the technical field of printing plates, and particularly to a water squeezing device for printing plates and a water squeezing method therefor. Background Art

[0002] Printing plates refer to a type of plate material that facilitates the display of information. By printing on the plate, the printed information is presented, and a water squeezing device is required during the processing of printing plates.

[0003] Common water squeezing devices on the market at present, when performing water squeezing work on printing plates, only drive the printing plates to move by a water squeezing roller, which easily leads to problems such as difficult movement of the printing plates. Moreover, only squeezing the printing plates with a single water squeezing roller cannot completely squeeze out the water on the printing plates, resulting in poor water squeezing effect. And the water squeezing roller can usually only perform water squeezing operations on printing plates of the same thickness. When performing water squeezing operations on printing plates of different thicknesses, different sizes of water squeezing rollers need to be replaced for operation, with low applicability. Summary of the Invention

[0004] The purpose of the present invention is to provide a water squeezing device for printing plates and a water squeezing method therefor, which have the advantages of being able to complete the movement of the printing plates through a conveyor belt, improving the water squeezing effect on the printing plates through two squeezes by the first water squeezing roller and the second water squeezing roller, and two drying operations by the spray head, effectively completing the water squeezing operation on the printing plates with good water squeezing effect. And during the water squeezing operation on the printing plates, the first water squeezing roller and the second water squeezing roller can be deflected while pressing the printing plates tightly to adapt to the water squeezing operation effect on printing plates of different thicknesses and sizes, solving the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A water squeezing device for printing plates, including a base, the upper surface of the base is fixedly connected with a box body, a collection box is arranged on the right side of the box body, through holes are opened on the surface of the box body, a conveyor belt is arranged on the inner wall of the box body through two rotating rods, a plurality of water leakage holes are opened on the surface of the conveyor belt, and the two rotating rods are fixedly connected with the inner wall of the box body for shaft rotation. The first water squeezing roller and the second water squeezing roller are evenly arranged above the conveyor belt;

[0006] An auxiliary component for drying the printing plates is arranged on the inner wall of the box body;

[0007] A driving component for the rotation of the first water squeezing roller and the second water squeezing roller is arranged inside the box body.

[0008] Optionally, a guide plate is fixedly connected to the surface of the through hole on one side, the printing plate is placed on the guide plate, and an inclined guide plate is fixedly connected to the surface of the through hole on the other side, and the collection box is located below the inclined guide plate.

[0009] Optionally, the auxiliary component includes a fixing plate fixedly connected to the inner wall of the box body. A hot air blower is arranged on the upper surface of the fixing plate. An air inlet pipe and a connecting pipe are fixedly communicated with the surface of the hot air blower. The air inlet pipe extends out of the box body and is fixedly communicated with it. The end of the connecting pipe is fixedly communicated with a shell, and the shell is fixedly connected to the inner wall of the box body through a connecting block. An air outlet pipe is fixedly communicated with the surface of the shell, and the end of the air outlet pipe is fixedly communicated with a U-shaped pipe, and an air outlet is opened on the lower surface of the U-shaped pipe.

[0010] Optionally, a plurality of air outlets are arranged and evenly opened on the lower surface of the U-shaped pipe, and nozzles are fixedly communicated with the surfaces of the plurality of air outlets.

[0011] Optionally, the driving component includes an impeller arranged inside the shell. A first rotating shaft is fixedly connected to the axis of the impeller. A second rotating shaft and a third rotating shaft are respectively fixedly connected to the surfaces of the first water squeezing roller and the second water squeezing roller. A belt pulley transmission mechanism is jointly arranged between the first rotating shaft and the second rotating shaft and the third rotating shaft.

[0012] Optionally, a first rotating plate is jointly and rotatably connected to the first rotating shaft and the second rotating shaft in a fixed-axis manner, and a second rotating plate is jointly and rotatably connected to the first rotating shaft and the third rotating shaft in a fixed-axis manner. Fixing blocks are fixedly connected to the surfaces of the first rotating plate and the second rotating plate. Springs are arranged on the surfaces of the two fixing blocks, and the ends of the springs are fixedly connected to the inner wall of the box body.

[0013] Optionally, the size of the through hole is larger than the size of the printing plate.

[0014] Optionally, an inclined plate is fixedly connected to the inner wall of the box body, a water outlet pipe is arranged on the surface of the box body, and a control valve is arranged on the surface of the water outlet pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The present invention involves putting the printed board through the through - hole on the left side, then turning on the conveyor belt and the hot air blower. Under the action of the conveyor belt, the printed board can be driven to move rightward inside the box body. The printed board undergoes two water - squeezing operations by the first water - squeezing roller and the second water - squeezing roller inside the box body, as well as two drying operations by the nozzle. Finally, it slides into the collection box along the inclined guide plate through the through - hole on the right side. This ensures the water - squeezing effect on the printed board, improves the quality of the printed board after the water - squeezing operation, and can complete the movement of the printed board through the transportation of the conveyor belt, solving the problem that in general water - squeezing devices, only the rotation of one water - squeezing roller drives the movement of the printed board, resulting in difficult movement of the printed board.

[0017] 2. Through the combined use of the first rotating plate, the second rotating plate, the spring, and the fixed block, during the water - squeezing process, the first water - squeezing roller and the second water - squeezing roller can deflect around the first rotating shaft. And under the action of the elastic potential energy of the spring, the first water - squeezing roller and the second water - squeezing roller can press the printed board while deflecting, so that the first water - squeezing roller and the second water - squeezing roller can be adapted to perform water - squeezing operations on printed boards of different thicknesses and sizes.

[0018] 3. Through the combined use of the guide plate and the inclined guide plate, when the printed board is placed in the through - hole on the left side, it can be accurately placed on the surface of the conveyor belt to prevent the printed board from falling into the box body. And when the printed board detaches from the through - hole on the right side, it can accurately fall into the lower collection box to prevent the printed board from falling on the base and being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the internal schematic diagram of the structure of the present invention;

[0020] Figure 2 is the axonometric drawing of the structure of the present invention;

[0021] Figure 3 is the partial cross - sectional view of the present invention;

[0022] Figure 4 is the schematic diagram of the structure at the first rotating shaft of the present invention.

[0023] In the figure: 1, base; 2, box body; 3, through - hole; 4, guide plate; 5, collection box; 6, printed board; 7, guide plate; 8, first water - squeezing roller; 9, conveyor belt; 10, water leakage port; 11, U - shaped pipe; 12, control valve; 13, water outlet pipe; 14, inclined plate; 15, second water - squeezing roller; 17, second rotating plate; 18, fixed block; 19, spring; 20, shell; 21, first rotating plate; 22, connecting pipe; 23, hot air blower; 24, air outlet pipe; 25, nozzle; 26, third rotating shaft; 27, belt pulley drive mechanism; 28, first rotating shaft; 29, second rotating shaft. DETAILED DESCRIPTION OF THE INVENTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with 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.

[0025] Please refer to Figures 1 to 4 , the present invention provides a water squeezing device for printing plates, including a base 1. The upper surface of the base 1 is fixedly connected with a box body 2. A collection box 5 is arranged on the right side of the box body 2. Through holes 3 are formed on the surface of the box body 2. A conveyor belt 9 is arranged on the inner wall of the box body 2 through two rotating rods. A plurality of water leakage holes 10 are formed on the surface of the conveyor belt 9. The two rotating rods are fixedly connected to the inner wall of the box body 2 for shaft rotation. Above the conveyor belt 9, a first water squeezing roller 8 and a second water squeezing roller 15 are evenly arranged;

[0026] An auxiliary component for drying the printing plate 6 is arranged on the inner wall of the box body 2;

[0027] A driving component for rotating the first water squeezing roller 8 and the second water squeezing roller 15 is arranged inside the box body 2.

[0028] More specifically, when this embodiment is in use, as Figure 1As shown in the figure, the printed board 6 is placed into the through hole 3 on the left side. The conveyor belt 9 is started. Under the action of the conveyor belt 9, the printed board 6 can be driven to move to the right. As the printed board 6 moves, it will first be subjected to the first extrusion by the first water squeezing roller 8. After extrusion, water will be separated from the printed board 6. The separated water will drip onto the bottom of the box body 2 through a plurality of water leakage holes 10 on the surface of the conveyor belt 9 for subsequent unified treatment. Under the action of the driving component, the first water squeezing roller 8 can be driven to rotate, so that the first water squeezing roller 8 can extrude the surface of the printed board 6 more evenly. After the first extrusion by the first water squeezing roller 8 is completed, as the printed board 6 continues to move, it will pass under the auxiliary component. Under the action of the auxiliary component, the printed board 6 can be dried for the first time. During the drying process, the water separated from the printed board 6 will also drip onto the bottom of the box body 2 through the water leakage holes 10. After the first drying is completed, as the printed board 6 continues to move, the printed board 6 will be subjected to the second extrusion by the second water squeezing roller 15. After the second extrusion is completed, the printed board 6 will move under the auxiliary component again for the second drying. Finally, it will move out of the inside of the box body 2 from the through hole 3 on the right side and fall into the collection box 5 placed on the right side of the box body 2 under the action of gravity for subsequent unified treatment. Through the conveying of the conveyor belt 9, the movement of the printed board 6 is completed, effectively avoiding the problem that it is easy to cause difficult movement when driving the printed board to move only by the rotation of one water squeezing roller. Through the two-time extrusion by the first water squeezing roller 8 and the second water squeezing roller 15 and the two-time drying by the auxiliary component, the water squeezing effect on the printed board 6 is improved, the water squeezing operation of the printed board 6 is effectively completed, and the quality of the printed board 6 after the water squeezing operation is also improved. Moreover, under the action of the driving component, the first water squeezing roller 8 and the second water squeezing roller 15 can be made to rotate and adapt to press different sizes of printed boards 6, thus solving the problem that the general water squeezing roller can usually only perform water squeezing operations on printed boards of the same thickness, and when performing water squeezing operations on printed boards of different thicknesses, it is necessary to replace the water squeezing roller for operation, and the applicability is low.

[0029] It should be noted that since the printed board 6 is first subjected to the first extrusion and water squeezing, then the first drying and water discharging, and then the second extrusion and water squeezing and the second drying and water discharging, drying the printed board 6 after the first extrusion can effectively avoid the temporary deformation of the printed board 6 after the first extrusion, so as to reduce the water squeezing effect of the second extrusion and water squeezing, thus ensuring the water squeezing effect of the two-time extrusion and water discharging by the first water squeezing roller 8 and the second water squeezing roller 15, and further improving the water squeezing effect on the printed board 6.

[0030] Embodiment 2, on the basis of the above embodiment,

[0031] Furthermore, in order to enable the printing plate 6 to be accurately placed on the surface of the conveyor belt 9 when placed in the through hole 3 on the left side, and to accurately fall into the lower collection box 5 when disengaging from the through hole 3 on the right side, a guide plate 7 is fixedly connected to the surface of one side through hole 3, the printing plate 6 is placed on the guide plate 7, and an inclined guide plate 4 is fixedly connected to the surface of the other side through hole 3. The collection box 5 is located below the inclined guide plate 4.

[0032] More specifically, when this embodiment is in use, since the ends of the guide plate 7 and the inclined guide plate 4 are both in contact with the surface of the conveyor belt 9, when placing the printing plate 6, only need to place the printing plate 6 on the guide plate 7 and slightly push the printing plate 6 towards the inside of the box body 2. When it is felt that the printing plate 6 is moving under the action of the conveyor belt 9, the placement of the printing plate 6 can be completed, thus ensuring that the printing plate 6 can be accurately placed on the surface of the conveyor belt 9. And the setting of the inclined guide plate 4 enables the printing plate 6 to accurately slide into the lower collection box 5 through the inclined guide plate 4 under the action of gravity when disengaging from the conveyor belt 9.

[0033] Embodiment Three, on the basis of the above embodiment,

[0034] Furthermore, the auxiliary components in Embodiment One are disclosed. The auxiliary components include a fixing plate fixedly connected to the inner wall of the box body 2. A hot air blower 23 is arranged on the upper surface of the fixing plate. An air inlet pipe and a connecting pipe 22 are fixedly communicated with the surface of the hot air blower 23. The air inlet pipe extends out of the box body 2 and is fixedly communicated with it. The end of the connecting pipe 22 is fixedly communicated with a housing 20. The housing 20 is fixedly connected to the inner wall of the box body 2 through a connecting block. An air outlet pipe 24 is fixedly communicated with the surface of the housing 20. The end of the air outlet pipe 24 is fixedly communicated with a U-shaped pipe 11. An air outlet is opened on the lower surface of the U-shaped pipe 11.

[0035] A plurality of air outlets are provided and evenly opened on the lower surface of the U-shaped pipe 11. Nozzles 25 are fixedly communicated with the surfaces of the plurality of air outlets.

[0036] More specifically, when this embodiment is in use, turn on the hot air blower 23. Under the action of the hot air blower 23, the outside air can be inhaled through the air inlet pipe, and after being heated by the hot air blower 23, it is discharged through the connecting pipe 22. The discharged hot air will flow through the housing 20 and the air outlet pipe 24 and then into the U-shaped pipe 11, and finally be sprayed out through a plurality of nozzles 25 arranged below the U-shaped pipe 11 to dry and squeeze water from the printing plate 6 passing below the nozzles 25.

[0037] Embodiment Four, on the basis of the above embodiment,

[0038] Further, the driving component in Embodiment 1 is disclosed. The driving component includes an impeller disposed inside the housing 20. A first rotating shaft 28 is fixedly connected to the axis of the impeller. A second rotating shaft 29 and a third rotating shaft 26 are respectively fixedly connected to the surfaces of the first water squeezing roller 8 and the second water squeezing roller 15. A pulley transmission mechanism 27 is jointly provided between the first rotating shaft 28 and the second rotating shaft 29 and the third rotating shaft 26.

[0039] More specifically, when in use in this embodiment, when the hot air blower 23 is turned on and air flows into the housing 20, the air flow inside the housing 20 will cause the impeller inside the housing 20 to start rotating. The rotation of the impeller will drive the first rotating shaft 28 to start rotating. Under the action of the pulley transmission mechanism 27, the rotation of the first rotating shaft 28 will drive the second rotating shaft 29 and the third rotating shaft 26 to start rotating synchronously. The rotation of the second rotating shaft 29 and the third rotating shaft 26 will respectively drive the first water squeezing roller 8 and the second water squeezing roller 15 to start rotating, so as to perform a more uniform water squeezing operation on the printing plate 6 passing below the first water squeezing roller 8 and the second water squeezing roller 15.

[0040] Embodiment 5, on the basis of the above embodiment,

[0041] Further, in order to enable the first water squeezing roller 8 and the second water squeezing roller 15 to closely adhere to printing plates 6 of different sizes during rotation for water squeezing operations, a first rotating plate 21 is jointly fixedly connected to rotate coaxially between the first rotating shaft 28 and the second rotating shaft 29. A second rotating plate 17 is jointly fixedly connected to rotate coaxially between the first rotating shaft 28 and the third rotating shaft 26. Fixed blocks 18 are fixedly connected to the surfaces of the first rotating plate 21 and the second rotating plate 17. Springs 19 are provided on the surfaces of the two fixed blocks 18. The ends of the springs 19 are fixedly connected to the inner wall of the box body 2.

[0042] More specifically, when in use in this embodiment, when the printing plate 6 moves to the lower side of the first water squeezing roller 8 under the action of the conveyor belt 9, if the thickness of the printing plate 6 is relatively large, it will upwardly press the first water squeezing roller 8. At this time, the first water squeezing roller 8 will start to move in a circular motion with the first rotating shaft 28 as the center and the first rotating plate 21 as the radius. Under the action of the elastic potential energy of the spring 19, the first water squeezing roller 8 will tightly press the printing plate 6 below while moving, so that the first water squeezing roller 8 can be adapted to perform water squeezing operations on printing plates 6 of different thickness sizes. Similarly, the second water squeezing roller 15 can also be adapted to perform water squeezing operations on printing plates 6 of different thickness sizes, enhancing the applicability of the device.

[0043] Embodiment 6, on the basis of the above embodiment,

[0044] Further, in order to ensure that the printing plate 6 can be put into the through hole 3 on the left and can be detached from the through hole 3 on the right, the size of the through hole 3 is larger than the size of the printing plate 6.

[0045] More specifically, when this embodiment is in use, since the size of the through hole 3 is larger than the size of the printing plate 6, it can be ensured that the printing plate 6 can be inserted into the through hole 3 on the left and can be separated from the through hole 3 on the right, thus ensuring the normal use of the device.

[0046] Embodiment Seven, on the basis of the above embodiment,

[0047] Furthermore, in order to facilitate the unified collection and treatment of the water separated from the printing plate 6 and falling to the bottom of the box body 2, an inclined plate 14 is fixedly connected to the inner wall of the box body 2, a water outlet pipe 13 is arranged on the surface of the box body 2, and a control valve 12 is arranged on the surface of the water outlet pipe 13.

[0048] More specifically, when this embodiment is in use, the water separated from the printing plate 6 will drip onto the inclined plate 14 through the water leakage port 10, and under the action of gravity, the water can slide on the inclined plate 14 and gather on one side of the water outlet pipe 13 at the bottom of the box body 2. Then, by opening the control valve 12, the water gathered at the bottom of the box body 2 can be discharged from the water outlet pipe 13, effectively avoiding the problem that water remains on the inner wall of the box body 2 and is not easily discharged.

[0049] Working principle: For this water squeezing method of a printing plate, when in use, the printing plate 6 is inserted into the through hole 3 on the left, and then the conveyor belt 9 and the hot air blower 23 are started. Under the action of the conveyor belt 9, the printing plate 6 can be driven to move rightward inside the box body 2, and successively pass through the first water squeezing operation of the first water squeezing roller 8, the first drying and water discharging of the left spray head 25, the second technical operation of the second water squeezing roller 15, and the second drying and water discharging of the right spray head 25. Finally, it slides into the collection box 5 along the inclined surface guiding plate 4 from the through hole 3 on the right. During this process, the water separated from the printing plate 6 will fall to the bottom of the box body 2 through the water leakage port 10 for subsequent unified treatment. And during the water squeezing process, the first water squeezing roller 8 and the second water squeezing roller 15 can deflect around the first rotating shaft, and under the action of the elastic potential energy of the spring 19, the first water squeezing roller 8 and the second water squeezing roller 15 can be pressed against the printing plate 6 while deflecting to adapt to the water squeezing operation of printing plates 6 with different thicknesses and sizes, enhancing the applicability of the device.

[0050] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water squeezing device for printing plates, comprising a base (1), characterized in that: The upper surface of the base (1) is fixedly connected with a box body (2). A collection box (5) is arranged on the right side of the box body (2). Through holes (3) are formed on the surface of the box body (2). A conveyor belt (9) is arranged on the inner wall of the box body (2) through two rotating rods. A plurality of water leakage holes (10) are formed on the surface of the conveyor belt (9). The two rotating rods are fixedly and axially rotatably connected to the inner wall of the box body (2). Above the conveyor belt (9), a water squeezing roller one (8) and a water squeezing roller two (15) are evenly arranged; an auxiliary component for drying the printed board (6) is arranged on the inner wall of the box body (2); a driving component for rotating the water squeezing roller one (8) and the water squeezing roller two (15) is arranged inside the box body (2); the driving component includes an impeller arranged inside a shell (20). The axis of the impeller is fixedly connected with a rotating shaft one (28). A rotating shaft two (29) and a rotating shaft three (26) are respectively fixedly connected to the surfaces of the water squeezing roller one (8) and the water squeezing roller two (15). A belt pulley transmission mechanism (27) is jointly arranged between the rotating shaft one (28) and the rotating shaft two (29) and the rotating shaft three (26); a rotating plate one (21) is jointly and axially rotatably connected between the rotating shaft one (28) and the rotating shaft two (29). A rotating plate two (17) is jointly and axially rotatably connected between the rotating shaft one (28) and the rotating shaft three (26). Fixed blocks (18) are fixedly connected to the surfaces of the rotating plate one (21) and the rotating plate two (17). Springs (19) are arranged on the surfaces of the two fixed blocks (18). The ends of the springs (19) are fixedly connected to the inner wall of the box body (2); the auxiliary component includes a fixing plate fixedly connected to the inner wall of the box body (2). A hot air blower (23) is arranged on the upper surface of the fixing plate. An air inlet pipe and a connecting pipe (22) are fixedly communicated with the surface of the hot air blower (23). The air inlet pipe extends out of the box body (2) and is fixedly communicated with it. The end of the connecting pipe (22) is fixedly communicated with a shell (20). The shell (20) is fixedly connected to the inner wall of the box body (2) through a connecting block. An air outlet pipe (24) is fixedly communicated with the surface of the shell (20). The end of the air outlet pipe (24) is fixedly communicated with a U-shaped pipe (11). Air outlet holes are formed on the lower surface of the U-shaped pipe (11).

2. The water squeezing device for printing plates according to claim 1, characterized in that: A guiding plate (7) is fixedly connected to the surface of one side of the through hole (3). The printed board (6) is placed on the guiding plate (7). An inclined surface guiding plate (4) is fixedly connected to the surface of the through hole (3) on the other side. The collection box (5) is located below the inclined surface guiding plate (4).

3. The water squeezing device for printing plates according to claim 1, characterized in that: A plurality of the air outlet holes are arranged and evenly formed on the lower surface of the U-shaped pipe (11). Nozzles (25) are fixedly communicated with the surfaces of the plurality of air outlet holes.

4. The water squeezing device for printing plates according to claim 1, characterized in that: The size of the through hole (3) is larger than the size of the printed board (6).

5. The water squeezing device for printing plates according to claim 1, characterized in that: An inclined plate (14) is fixedly connected to the inner wall of the box body (2). A water outlet pipe (13) is arranged on the surface of the box body (2). A control valve (12) is arranged on the surface of the water outlet pipe (13).

6. A water squeezing method for a water squeezing device of a printed board according to claim 5, characterized in that: It includes the following steps: S1: First, put the printing plate (6) into the through hole (3) on the left side, start the conveyor belt (9). Under the action of the conveyor belt (9), the printing plate (6) can be driven to move to the right inside the box body (2). At the same time, start the hot air blower (23) so that hot air is ejected from the nozzle (25), and under the action of the impeller in the housing (20), the water squeezing roller one (8) and the water squeezing roller two (15) rotate, so that the printing plate (6) will successively pass through the first water squeezing operation of the water squeezing roller one (8), the first drying and water discharging of the left nozzle (25), the second water squeezing operation of the water squeezing roller two (15), and the second drying and water discharging of the right nozzle (25), and finally slide into the collection box (5) along the inclined surface guide plate (4) from the through hole (3) on the right side of the box body (2); S2: The water separated from the printing plate (6) will fall into the bottom of the box body (2) through the water leakage port (10) for subsequent unified treatment; S3: During the water squeezing process, the water squeezing roller one (8) and the water squeezing roller two (15) can deflect around the rotating shaft one, and under the action of the elastic potential energy of the spring (19), the water squeezing roller one (8) and the water squeezing roller two (15) can press the printing plate (6) while deflecting, so as to adapt to the water squeezing operation of printing plates (6) with different thicknesses and sizes.

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