Paper spacing adjusting equipment for flexible printing machine

Abstract

The invention discloses paper spacing adjusting equipment for a flexible printing machine, and relates to the field of flexible printing machines, the paper spacing adjusting equipment comprises a printing machine conveying frame, a conveying belt is mounted on the printing machine conveying frame, a plurality of groups of corrugated boards uniformly cover the surface of the conveying belt, and a paper spacing adjusting mechanism is mounted at the top of the printing machine conveying frame; a dust removal and suction integrated mechanism is installed on one side of the paper spacing adjusting mechanism, a positioning seat is arranged on the paper spacing adjusting mechanism and fixed to the side wall of the printing machine conveying frame in a threaded connection mode, an installation table is fixedly arranged on the upper portion of the positioning seat, and an installation plate is installed at the top of the installation table. According to the paper spacing adjusting equipment for the flexible printing machine, the paper spacing adjusting equipment can conveniently adapt to changes of specifications of various corrugated boards by adjusting the spacing of the corrugated boards, the conveying belt does not need to be replaced or complex equipment adjustment does not need to be carried out, and the compatibility of the printing machine to different corrugated boards is improved; and paper of different sizes can be printed.

Description

Technical Field

[0001] The present invention relates to the field of flexographic printing presses, and particularly to a paper spacing adjusting device for a flexographic printing press. Background Art

[0002] A flexographic printing press uses a flexible printing plate and transfers ink through an anilox roll. It is a type of letterpress printing process. During printing, the anilox roll evenly coats a certain thickness of ink layer on the graphic part of the printing plate, and then under the action of the pressure of the impression cylinder, the ink layer on the graphic part is transferred to the surface of the printing substrate to form clear graphics. A large amount of ink will stain the surface of the anilox roll and the printing table during the printing process of the flexographic printing press, and the equipment is seriously dirty, so it needs to be cleaned regularly. The current treatment method is generally to remove the anilox roll and the printing table from the printing press, and then remove the surface ink by flushing with clean water. However, such cleaning efficiency is low, and it will consume a large amount of cleaning water, which is not conducive to environmental protection and energy conservation. To solve the above problems, after searching, a Chinese patent with the publication number CN219806575U discloses a flexographic printing press with a self-cleaning function, which includes a bottom plate, vertical frames symmetrically installed on the upper end of the bottom plate, an anilox roll and a printing table installed between the vertical frames, and an integrated pedestal arranged behind the anilox roll and the printing table. It is characterized in that the printing table is arranged below the anilox roll, a vertical oil cylinder is installed at the rear side of the upper end of the bottom plate, the integrated pedestal is installed on the output shaft at the upper end of the vertical oil cylinder, a water collecting tank is arranged in the middle of the upper end of the bottom plate, and a water supply pipe is connected between the upper end of the bottom plate and the integrated pedestal. Although the above device can intercept the cleaning water flow through the printing table and the water collecting tank on the bottom plate, recycle the sprayed water flow again, enhance the reuse rate, and improve the energy-saving performance of the equipment, in actual use, when the flexographic printing press prints different papers, the paper spacing cannot be adjusted. When changing papers of different sizes, it is necessary to stop the machine to adjust the conveyor belt or paper feeding parameters, which increases the order change time and cannot be compatible with papers of different sizes for printing work. Summary of the Invention

[0003] The purpose of the present invention is to provide a paper spacing adjusting device for a flexographic printing press to solve the defects mentioned in the above background art.

[0004] To achieve the above object, a paper spacing adjustment device for a flexible printing press is provided, including a printing press conveying rack, on which a conveyor belt is installed, and the surface of the conveyor belt is evenly covered with multiple groups of corrugated cardboard. A paper spacing adjustment mechanism is installed on the top of the printing press conveying rack, and a dust removal and suction integrated mechanism is installed on one side of the paper spacing adjustment mechanism. A positioning seat is provided on the paper spacing adjustment mechanism, and the positioning seat is screwed and fixed on the side wall of the printing press conveying rack. An installation table is fixedly provided on the upper part of the positioning seat, and an installation plate is installed on the top of the installation table. A driving plate is movably installed on the upper side surface of the installation plate, a servo electric cylinder is installed on the upper side of the middle part of the driving plate, and the output shaft of the servo electric cylinder is fixedly connected to the driving plate.

[0005] Further, the paper spacing adjustment mechanism includes a deviation correction table, a connecting arm, an infrared emitter, an infrared receiver, an adjustment hole, a stud, a positioning seat, an installation table, a transmission arm, a pressing seat, a silica gel pad, an installation plate, a guide post, a driving plate, a gantry and a servo electric cylinder. The servo electric cylinder is screwed and fixed in the middle of the gantry, and both sides of the bottom of the gantry are fixedly connected to the installation plate.

[0006] Further, guide holes are formed on both sides of the surface of the installation plate, and transmission arms are inserted into the two groups of guide holes. The two groups of transmission arms are respectively fixedly connected to both sides of the bottom of the driving plate. Guide posts are inserted into both sides of the surface of the driving plate. The top of the guide post is fixedly connected to the gantry, and the bottom of the guide post is fixedly connected to the installation plate.

[0007] Further, pressing seats are installed at the bottoms of the two groups of transmission arms. The pressing seats are arc-shaped structures made of plastic materials. Silica gel pads are adhesively fixed to the bottoms of the two groups of pressing seats. The two groups of pressing seats are respectively arranged on both sides of the surface of the corrugated cardboard; the two groups of pressing seats are driven to lift synchronously by the servo electric cylinder and the driving plate.

[0008] Further, the installation table is an "L"-shaped structure made of metal material. The installation table is fixedly installed on the printing press conveying rack through the positioning seat. Two adjustment holes are formed on the side wall of the installation table, and studs are inserted into the two groups of adjustment holes. The studs pass through the adjustment holes and are screwed and fixed to nuts.

[0009] Further, deviation correction tables are fixedly installed at the ends of the two groups of studs. Two groups of deviation correction tables are respectively arranged on both sides of the corrugated cardboard. The cross-sections of the two groups of deviation correction tables are both "L"-shaped, and a deviation correction space for the corrugated cardboard is formed between the two groups of deviation correction tables.

[0010] Further, connecting arms are fixedly connected to the ends of the two groups of deviation correction tables, and an infrared emitter and an infrared receiver are respectively installed at the ends of the two groups of connecting arms. A spacing detection space for the corrugated cardboard is formed between the infrared emitter and the infrared receiver. The infrared emitter and the infrared receiver are respectively arranged on both sides of the corrugated cardboard.

[0011] Further, the dust removal and suction integrated mechanism includes a dust removal plate, exhaust holes, an air inlet pipe, connecting columns, connecting seats, docking plates, a negative pressure plate, a negative pressure pipe, and an air extraction pipe; the interior of the dust removal plate is hollow, and multiple groups of exhaust holes are evenly installed at the bottom of the dust removal plate, and the multiple groups of exhaust holes are linearly distributed.

[0012] Further, the surface of the dust removal plate is covered with a negative pressure plate, the bottom area of the negative pressure plate is larger than the bottom area of the dust removal plate, the cross-section of the negative pressure plate is arranged in an isosceles trapezoid, and connecting columns are installed at both ends of the negative pressure plate and the dust removal plate. A connecting seat is fixedly installed at the end of the connecting column, and a docking plate is welded to the bottom of the connecting seat. The docking plate is screwed and fixed on the inner wall of the printing machine conveyor frame; the length of the dust removal plate is greater than the width of the corrugated cardboard.

[0013] Further, negative pressure pipes are installed on both sides of the surface of the negative pressure plate, the tops of the two groups of negative pressure pipes are communicated with the air extraction pipe, and the end of the air extraction pipe is communicated with a negative pressure fan.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. Through the setting of the paper spacing adjustment mechanism of the present invention, the spacing between corrugated cardboard and corrugated cardboard can be adjusted. An infrared emitter and an infrared receiver are arranged between the corrugated cardboard on the conveyor belt. The infrared receiver is electrically connected to the servo electric cylinder through a controller, and the servo electric cylinder can drive the pressing seat and the silica gel pad to move downward and press on the surface of the corrugated cardboard; according to the printing process requirements and the specifications of the corrugated cardboard, preset the ideal spacing value between the corrugated cardboard; by adjusting the corrugated cardboard spacing, it is convenient to adapt to the changes of various corrugated cardboard specifications, without replacing the conveyor belt or performing complex equipment adjustments, improving the compatibility of the printing machine with different corrugated cardboard; compatible with different sizes of paper for printing work; 2. When the gas is ejected from the atomizing nozzles at the bottom of the dust removal plate of the present invention, a strong impact force can be generated, effectively impacting the surface of the corrugated cardboard, making the dust originally attached to the cardboard quickly float up, facilitating subsequent dust suction operations. Compared with the simple dust suction method, it can remove dust more thoroughly and improve the dust removal effect; the atomizing nozzles can evenly spray the gas on the surface of the corrugated cardboard, covering the entire area to be printed, without dust removal dead corners, ensuring that all parts of the corrugated cardboard can be effectively cleaned, providing good surface conditions for subsequent printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view schematic diagram of the structure of the present invention; Figure 2 It is a rear view of the structure of the present invention; Figure 3 It is a top view of the structure of the present invention; Figure 4 It is a side view of the structure of the present invention; Figure 5 A cross-sectional view of the structure of the present invention; Figure 6 The structure of the present invention Figure 5 Side view; Figure 7 The structure of the present invention Figure 5 Rear view; Figure 8 Schematic diagram of the lower pressing seat and its connection structure of the structure of the present invention; Figure 9 The structure of the present invention Figure 8 Top view.

[0016] Reference numerals

[0017] 1. Printing press conveying frame; 2. Conveyor belt; 3. Corrugated cardboard; 4. Paper spacing adjusting mechanism; 40. Deviation rectifying table; 41. Connecting arm; 42. Infrared emitter; 421. Infrared receiver; 43. Adjusting hole; 44. Stud; 45. Positioning seat; 46. Installation table; 47. Driving arm; 471. Lower pressing seat; 472. Silicone pad; 48. Installation plate; 49. Guide post; 491. Driving plate; 492. Gantry; 493. Servo electric cylinder; 5. Dust removal and dust suction integrated mechanism; 50. Dust removal disc; 500. Exhaust hole; 51. Air inlet pipe; 52. Connecting column; 53. Connecting seat; 54. Docking plate; 55. Negative pressure disc; 56. Negative pressure pipe; 57. Exhaust pipe. Detailed implementation manners

[0018] Detailed implementation manner 1: Please refer to Figures 1-9 , the present invention provides a technical solution: A paper spacing adjusting device for a flexographic printing press, including a printing press conveying frame 1, a conveyor belt 2 is installed on the printing press conveying frame 1, multiple groups of corrugated cardboard 3 are evenly covered on the surface of the conveyor belt 2, a paper spacing adjusting mechanism 4 is installed on the top of the printing press conveying frame 1, a dust removal and dust suction integrated mechanism 5 is installed on one side of the paper spacing adjusting mechanism 4, a positioning seat 45 is arranged on the paper spacing adjusting mechanism 4, the positioning seat 45 is screwed and fixed on the side wall of the printing press conveying frame 1, an installation table 46 is fixedly arranged on the upper part of the positioning seat 45, an installation plate 48 is installed on the top of the installation table 46, a driving plate 491 is movably installed on the upper side surface of the installation plate 48, a servo electric cylinder 493 is installed on the upper side of the middle part of the driving plate 491, and the output shaft of the servo electric cylinder 493 is fixedly connected to the driving plate 491.

[0019] Working principle: During actual use, a conveyor belt 2 is movably installed on the printing press conveyor frame 1. Multiple groups of corrugated cardboard 3 are arranged on the conveyor belt 2. During the process of conveying the corrugated cardboard 3, printing work can be carried out by a flexographic printing press. A paper spacing adjustment mechanism 4 is arranged on the printing press conveyor frame 1. The setting of the paper spacing adjustment mechanism 4 can adjust the spacing between the corrugated cardboard 3 and the corrugated cardboard 3. The specific adjustment method is as follows: When the flexographic printing press is printing the corrugated cardboard 3, an infrared emitter 42 and an infrared receiver 421 are arranged between the corrugated cardboard 3 on the conveyor belt 2. When the spacing between the corrugated cardboard 3 and the corrugated cardboard 3 is in a relative position with the infrared emitter 42 and the infrared receiver 421, the light emitted by the infrared emitter 42 can be received by the infrared receiver 421. The infrared receiver 421 is electrically connected to the servo electric cylinder 493 through a controller, and the servo electric cylinder 493 can drive the pressing seat 471 and the silica gel pad 472 to move downward and press on the surface of the corrugated cardboard 3. Specifically: The infrared emitter 42 and the infrared receiver 421 are respectively installed on both sides of the conveyor belt 2 to ensure that they are at the same horizontal height and in relative positions, and can accurately emit and receive infrared light. At the same time, the servo electric cylinder 493, the pressing seat 471 and the silica gel pad 472 are installed in appropriate positions so that the pressing seat 471 and the silica gel pad 472 can move vertically downward under the drive of the servo electric cylinder 493 and press on the surface of the corrugated cardboard 3. According to the printing process requirements and the specifications of the corrugated cardboard 3, a preset ideal spacing value between the corrugated cardboard 3 is set; this value will be used as the basis for subsequent adjustment. When the conveyor belt 2 starts to convey the corrugated cardboard 3, the infrared emitter 42 continuously emits infrared light. When the corrugated cardboard 3 passes between the infrared emitter 42 and the infrared receiver 421, the light will be blocked, so that the infrared receiver 421 cannot receive the signal. When the spacing between the corrugated cardboard 3 and the infrared emitter 42 and the infrared receiver 421 reaches the relative position, the infrared light can be received by the infrared receiver 421, and at this time the infrared receiver 421 will send a signal to the controller. After receiving the signal from the infrared receiver 421, the controller will compare it with the preset spacing value of the corrugated cardboard 3. If the actual spacing is inconsistent with the preset spacing, the controller will calculate the distance and direction that need to be adjusted according to the deviation value. The controller sends an instruction to the servo electric cylinder 493 according to the calculation result, and the servo electric cylinder 493 drives the pressing seat 471 and the silica gel pad 472 to move downward a certain distance and press on the surface of the corrugated cardboard 3 according to the instruction. By pressing the corrugated cardboard 3, when the conveyor belt 2 continues to run, the spacing between the corrugated cardboard 3 can be changed. If the actual spacing is greater than the preset spacing, the pressing time of the pressing seat 471 and the silica gel pad 472 can be appropriately extended to push the corrugated cardboard 3 backward on the conveyor belt 2, thereby reducing the spacing.Conversely, if the actual spacing is less than the preset spacing, the pressing time can be shortened, or the pressing seat 471 and the silicone pad 472 can be slightly lifted to allow the corrugated cardboard 3 to move forward on the conveyor belt 2 to increase the spacing; during the printing process, the infrared emitter 42 and the infrared receiver 421 will continuously detect the spacing between the corrugated cardboard 3 and feed back the information to the controller; the controller will continuously adjust the action of the servo electric cylinder 493 according to these real-time feedback information to keep the spacing between the corrugated cardboard 3 within the preset range and achieve the adjustment of the spacing between the corrugated cardboard 3; When the printing press needs to increase the printing speed, the spacing between the corrugated cardboard 3 can be appropriately increased to allow the corrugated cardboard 3 to have more sufficient time for transfer and positioning during the conveying process, avoiding collisions or jams of the corrugated cardboard 3 due to excessive speed, thus ensuring the smoothness of the printing process and improving the overall printing efficiency; on the contrary, when printing at a low speed, reducing the spacing between the corrugated cardboard 3 can make full use of the working time of the printing press and increase the number of printed sheets per unit time; by adjusting the spacing between the corrugated cardboard 3, the conveying rhythm of the corrugated cardboard 3 can be accurately arranged according to the length of the printed pattern and the working cycle of the printing press, enabling the printing press to print as many corrugated cardboard 3 as possible within a working cycle, reducing the idle time of the equipment and improving the utilization rate of the equipment; different printed patterns may require different positioning accuracies of the corrugated cardboard 3; the adjustable spacing between the corrugated cardboard 3 enables the operator to accurately control the position of the corrugated cardboard 3 on the conveyor belt according to specific printing requirements, ensuring that the printed pattern is accurately overprinted on the corrugated cardboard 3 and avoiding quality problems such as pattern deviation or overlap; different printing tasks may involve various specifications of corrugated cardboard 3, such as different lengths, widths and thicknesses; by adjusting the spacing between the corrugated cardboard 3, it is convenient to adapt to changes in various specifications of corrugated cardboard 3 without replacing the conveyor belt or performing complex equipment adjustments, improving the compatibility of the printing press with different corrugated cardboard 3; for some special printing tasks, such as printing multiple different patterns or performing regional printing on the corrugated cardboard 3, the adjustable spacing between the corrugated cardboard 3 can flexibly adjust the conveying position and spacing of the corrugated cardboard 3 according to specific printing layout requirements to meet diverse printing needs; Before printing on the surface of the corrugated board 3, the dust removal and suction integrated mechanism 5 can be used to remove dust from the surface of the corrugated board 3. The specific method is as follows: The gas is ejected from the atomizing nozzle at the bottom of the dust removal disc 50, which can generate a strong impact force, effectively impact the surface of the corrugated board 3, and make the dust originally attached to the board quickly float up, facilitating subsequent dust suction operation. Compared with the simple dust suction method, it can remove dust more thoroughly and improve the dust removal effect; the atomizing nozzle can evenly spray the gas on the surface of the corrugated board 3, covering the entire area to be printed, without dust removal dead corners, ensuring that all parts of the corrugated board 3 can be effectively cleaned, providing good surface conditions for subsequent printing; different from some dust removal methods using mechanical brushing, this gas impact method does not directly contact the surface of the corrugated board 3, thus avoiding possible scratches on the board surface caused by mechanical friction, protecting the integrity and surface quality of the corrugated board 3, and being beneficial to improving the appearance effect of printed products; thorough dust removal work can effectively prevent dust from mixing into the ink or adhering to the printing plate during the printing process, avoiding printing defects such as ink dots and missing prints caused by dust particles, helping to ensure printing clarity and color uniformity, and improving printing quality; the negative pressure disc 55 timely sucks the floating dust and collects it, preventing it from spreading to the surrounding environment, reducing the dust pollution in the workshop, improving the working environment, being beneficial to the physical health of operators, and meeting environmental protection requirements at the same time; the collected dust can be centrally processed to avoid environmental pollution caused by random dust disposal; the entire dust removal process is automatically completed by gas ejection and negative pressure dust suction. The operator only needs to start the equipment without complex operations and adjustments, reducing the difficulty and workload of manual operations and improving work efficiency.

[0020] Specific Embodiment 2: This embodiment is a further limitation of Specific Embodiment 1. The paper spacing adjustment mechanism 4 includes a deviation rectifying table 40, a connecting arm 41, an infrared emitter 42, an infrared receiver 421, an adjustment hole 43, a stud 44, a positioning seat 45, an installation table 46, a transmission arm 47, a pressing seat 471, a silica gel pad 472, an installation plate 48, a guide post 49, a driving plate 491, a gantry 492 and a servo electric cylinder 493. The servo electric cylinder 493 is screwed and fixed in the middle of the gantry 492, and both sides of the bottom of the gantry 492 are fixedly connected to the installation plate 48.

[0021] Specific Embodiment 3: This embodiment is a further limitation of Specific Embodiment 2. Guide holes are opened on both sides of the surface of the installation plate 48, and two groups of transmission arms 47 are inserted into the two groups of guide holes. The two groups of transmission arms 47 are respectively fixedly connected to both sides of the bottom of the driving plate 491. Guide posts 49 are inserted into both sides of the surface of the driving plate 491. The top of the guide post 49 is fixedly connected to the gantry 492, and the bottom of the guide post 49 is fixedly connected to the installation plate 48.

[0022] Embodiment 4: This embodiment is a further limitation of Embodiment 3. Pressing seats 471 are installed at the bottoms of both groups of transmission arms 47. The pressing seat 471 is an arc-shaped structure made of plastic material. Silicone pads 472 are adhesively fixed to the bottoms of both groups of pressing seats 471. The two groups of pressing seats 471 are respectively arranged on both sides of the surface of the corrugated board 3. The two groups of pressing seats 471 are driven to lift synchronously by a servo electric cylinder 493 and a driving plate 491.

[0023] Embodiment 5: This embodiment is a further limitation of Embodiment 2. The mounting table 46 is an "L"-shaped structure made of metal material. The mounting table 46 is fixedly installed on the printing machine conveyor frame 1 through a positioning seat 45. Two adjustment holes 43 are opened on the side wall of the mounting table 46. Studs 44 are inserted into both groups of adjustment holes 43. The studs 44 pass through the adjustment holes 43 and are screwed and fixed with nuts.

[0024] Embodiment 6: This embodiment is a further limitation of Embodiment 5. Deviation correction platforms 40 are fixedly installed at the ends of both groups of studs 44. Two groups of deviation correction platforms 40 are respectively arranged on both sides of the corrugated board 3. The cross-sections of the two groups of deviation correction platforms 40 are both "L"-shaped. A deviation correction space for the corrugated board 3 is formed between the two groups of deviation correction platforms 40.

[0025] Embodiment 7: This embodiment is a further limitation of Embodiment 6. Connecting arms 41 are fixedly connected to the ends of both groups of deviation correction platforms 40. An infrared emitter 42 and an infrared receiver 421 are respectively installed at the ends of the two groups of connecting arms 41. A spacing detection space for the corrugated board 3 is formed between the infrared emitter 42 and the infrared receiver 421. The infrared emitter 42 and the infrared receiver 421 are respectively arranged on both sides of the corrugated board 3.

[0026] Embodiment 8: This embodiment is a further limitation of Embodiment 1. The dust removal and suction integrated mechanism 5 includes a dust removal disc 50, exhaust holes 500, an air inlet pipe 51, a connecting column 52, a connecting seat 53, a docking plate 54, a negative pressure disc 55, a negative pressure pipe 56 and an air extraction pipe 57. The inside of the dust removal disc 50 is hollow. A plurality of groups of exhaust holes 500 are evenly installed at the bottom of the dust removal disc 50. The multiple groups of exhaust holes 500 are linearly distributed.

[0027] Specific Embodiment Nine: This embodiment is a further limitation of Specific Embodiment Eight. The surface of the dust removal plate 50 is covered with a negative pressure plate 55. The bottom area of the negative pressure plate 55 is larger than the bottom area of the dust removal plate 50. The cross-section of the negative pressure plate 55 is arranged as an isosceles trapezoid. Connecting columns 52 are installed at both ends of the negative pressure plate 55 and the dust removal plate 50. A connecting seat 53 is fixedly installed at the end of the connecting column 52. A docking plate 54 is welded to the bottom of the connecting seat 53. The docking plate 54 is screwed and fixed on the inner wall of the printing machine conveyor frame 1; the length of the dust removal plate 50 is greater than the width of the corrugated cardboard 3.

[0028] Specific Embodiment Ten: This embodiment is a further limitation of Specific Embodiment Nine. Negative pressure pipes 56 are installed on both sides of the surface of the negative pressure plate 55. The tops of the two groups of negative pressure pipes 56 are communicated with an air extraction pipe 57. The end of the air extraction pipe 57 is communicated with a negative pressure fan.

Claims

1. A paper spacing adjustment device for a flexible printing press, comprising a printing press conveyor frame (1), characterized in that: The printing press conveyor frame (1) is provided with a conveyor belt (2), the surface of the conveyor belt (2) being evenly covered with a plurality of groups of corrugated paperboards (3), a paper spacing adjustment mechanism (4) being provided on the top of the printing press conveyor frame (1), a dust removal and suction mechanism (5) being provided on one side of the paper spacing adjustment mechanism (4), a positioning seat (45) being provided on the paper spacing adjustment mechanism (4), the positioning seat (45) being screwed and fixed on the side wall of the printing press conveyor frame (1), a mounting platform (46) being fixedly provided on the upper part of the positioning seat (45), a mounting plate (48) being installed on the top of the mounting platform (46), a driving plate (491) being movably installed on the upper surface of the mounting plate (48), a servo electric cylinder (493) being installed on the upper middle part of the driving plate (491), and an output shaft of the servo electric cylinder (493) being fixedly connected to the driving plate (491).

2. The paper spacing adjustment device for a flexible printing press according to claim 1, characterized in that: The paper spacing adjustment mechanism (4) comprises a deflection correction platform (40), a connecting arm (41), an infrared transmitter (42), an infrared receiver (421), an adjustment hole (43), a stud (44), a positioning seat (45), a mounting platform (46), a transmission arm (47), a lower pressing seat (471), a silicone pad (472), a mounting plate (48), a guide column (49), a driving plate (491), a gantry (492) and a servo electric cylinder (493), wherein the servo electric cylinder (493) is screwed and fixed to the middle part of the gantry (492), and both sides of the bottom of the gantry (492) are fixedly connected to the mounting plate (48).

3. The paper spacing adjustment device for a flexible printing press according to claim 2, characterized in that: Guide holes are provided on both sides of the surface of the mounting plate (48), and transmission arms (47) are inserted into the two sets of guide holes. The two sets of transmission arms (47) are respectively fixedly connected to the two sides of the bottom of the driving plate (491). Guide columns (49) are inserted into both sides of the surface of the driving plate (491), the top of the guide column (49) is fixedly connected to the gantry (492), and the bottom of the guide column (49) is fixedly connected to the mounting plate (48).

4. The paper spacing adjustment device for a flexible printing press according to claim 3, characterized in that: A lower pressing seat (471) is installed at the bottom of the two sets of transmission arms (47). The lower pressing seat (471) is an arc-shaped structure made of plastic material. A silicone pad (472) is bonded and fixed to the bottom of the two sets of lower pressing seats (471). The two sets of lower pressing seats (471) are respectively arranged on both sides of the surface of the corrugated cardboard (3). The two sets of lower pressing seats (471) are driven to rise and fall synchronously through a servo electric cylinder (493) and a driving plate (491).

5. The paper spacing adjustment device for a flexible printing press according to claim 2, characterized in that: The mounting platform (46) is an "L"-shaped structure made of metal material. The mounting platform (46) is fixedly mounted on the printing press conveyor frame (1) via a positioning seat (45). Two groups of adjustment holes (43) are opened on the side wall of the mounting platform (46). Studs (44) are inserted into the inside of the two groups of adjustment holes (43). The studs (44) pass through the adjustment holes (43) and are screwed and fixed with nuts.

6. The paper spacing adjustment device for a flexible printing press according to claim 5, characterized in that: The ends of the two groups of studs (44) are fixedly mounted with deflection correction platforms (40). Two groups of deflection correction platforms (40) are respectively arranged on both sides of the corrugated paperboard (3). The cross-sections of the two groups of deflection correction platforms (40) are both arranged in an "L" shape. A deflection correction space for the corrugated paperboard (3) is formed between the two groups of deflection correction platforms (40).

7. The paper spacing adjustment device for a flexible printing press according to claim 6, characterized in that: The ends of the two groups of deflection correction platforms (40) are fixedly connected to connecting arms (41), and the ends of the two groups of connecting arms (41) are respectively installed with infrared transmitters (42) and infrared receivers (421). A spacing detection space of the corrugated paperboard (3) is formed between the infrared transmitters (42) and the infrared receivers (421), and the infrared transmitters (42) and the infrared receivers (421) are respectively arranged on both sides of the corrugated paperboard (3).

8. The paper spacing adjustment device for a flexible printing press according to claim 1, characterized in that: The integrated dust removal and dust suction mechanism (5) comprises a dust removal disc (50), exhaust holes (500), an air inlet pipe (51), a connecting column (52), a connecting seat (53), a docking plate (54), a negative pressure disc (55), a negative pressure pipe (56) and an exhaust pipe (57); the interior of the dust removal disc (50) is hollow, and a plurality of groups of exhaust holes (500) are evenly installed at the bottom of the dust removal disc (50), and the plurality of groups of exhaust holes (500) are linearly distributed.

9. The paper spacing adjustment device for a flexible printing press according to claim 8, characterized in that: The surface of the dust removal plate (50) is covered with a negative pressure plate (55), the bottom area of ​​the negative pressure plate (55) is larger than the bottom area of ​​the dust removal plate (50), the cross section of the negative pressure plate (55) is an isosceles trapezoidal arrangement, connecting columns (52) are installed at both ends of the negative pressure plate (55) and the dust removal plate (50), a connecting seat (53) is fixedly installed at the end of the connecting column (52), a docking plate (54) is welded to the bottom of the connecting seat (53), and the docking plate (54) is screwed and fixed to the inner wall of the printing press conveyor frame (1); the length of the dust removal plate (50) is greater than the width of the corrugated cardboard (3).

10. The paper spacing adjustment device for a flexible printing press according to claim 9, characterized in that: Negative pressure tubes (56) are installed on both sides of the surface of the negative pressure plate (55), the tops of the two groups of negative pressure tubes (56) are connected to the exhaust pipe (57), and the ends of the exhaust pipe (57) are connected to the negative pressure fan.

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