Automatic feeding device for carton color printing and using method of automatic feeding device

Abstract

The invention relates to the technical field of carton printing equipment, and discloses an automatic feeding device for carton color printing and a using method thereof. When the positioning shaft moves upwards, a second pushing plate can be driven to synchronously move upwards, at the moment, the second pushing plate rotates around the positioning shaft, the side wall of the second pushing plate and the side wall of a first pushing plate are located on the same plane when the second pushing plate integrally moves upwards, and at the moment, the side wall of the second pushing plate makes contact with the side wall of stacked paperboards; therefore, slight friction force can be generated when the second pushing plate moves upwards, upward acting force is applied to the paperboards, and the situation that when the stacked paperboards move towards the color printing device through a conveying belt at the top of the main body, the paperboards are conveyed obliquely, and the paper boards are conveyed obliquely is reduced. When the bottom paperboard moves, the paperboard located above falls down under the action of gravity and then makes contact with the bottom paperboard, so that part of the paperboards are folded, the side walls of the paperboards are kept flat, and the overall quality of automatic color printing feeding of the device on the paperboards is improved.

Description

Technical Field

[0001] This invention relates to the field of cardboard box printing equipment technology, specifically to an automatic feeding device for color printing of cardboard boxes and its usage method. Background Technology

[0002] This device is an automated feeding equipment for a carton color printing production line. It can automatically separate, accurately position, and continuously transport stacked corrugated cardboard or carton blanks to the inlet of the color printing machine, effectively improving feeding stability and printing alignment accuracy. It is compatible with rapid switching of multiple carton specifications, enabling efficient, continuous, and stable operation of the printing process.

[0003] During the use of this device, the higher side is first connected to the cardboard lifting device, and the other side is connected to the cardboard color printing device. Then, the device is started, which moves the cardboard. As the cardboard moves, the push plate corrects the cardboard through the hydraulic rod. The corrected cardboard moves into the color printing device under the drive of the bottom conveyor belt, thus completing the automatic feeding of cardboard for color printing. In this process, because the cardboard is conveyed at an angle and the cardboard at the top falls downward under the action of gravity, it is easy for creases to appear when the accumulated cardboard moves towards the color printing device through the top conveyor belt of the main body and comes into contact with the bottom cardboard. This affects the quality of the automatic color printing feeding of the cardboard and the flatness of the cardboard. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic feeding device for color printing of cardboard boxes and its usage method, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention relates to an automatic feeding device for color printing of cardboard boxes and its method of use, comprising a main body and further comprising:

[0007] The pushing mechanism is installed inside the main body and is used to push the cardboard when the main body moves;

[0008] A buffer mechanism is installed on the side wall of the push mechanism to reduce the force generated when the push mechanism resets.

[0009] Furthermore, the main body includes:

[0010] The movable component is installed on the top of the main body and is used to change its position according to the stress point of the cardboard.

[0011] A limiting component is installed on the side wall of the moving component and is used to move in the direction of the cardboard when the moving component moves.

[0012] Furthermore, the promoting organizations include:

[0013] A rotating component is installed inside the limiting component and is used to rotate the limiting component during contact with the cardboard.

[0014] The rotating component is installed inside the limiting component and is used to rotate under the thrust of the rotating component when the rotating component moves.

[0015] Furthermore, the buffer mechanism includes:

[0016] A sliding component is installed on the side wall of the rotating component and is used to slide by the thrust of the rotating component when the rotating component rotates.

[0017] Furthermore, the moving component includes two sliding plates slidably connected to the top of the main body, with hydraulic rods fixedly connected to the top of the sliding plates;

[0018] The side walls of the two sliding plates are fixedly connected to a support frame, and the side walls of the support frame are fixedly connected to a baffle.

[0019] Furthermore, the limiting component includes a push plate 1 fixedly connected to the output end of the hydraulic rod. The push plate 1 has a placement groove on the side away from the hydraulic rod, and sliding grooves are provided on the front and back of the placement groove.

[0020] Furthermore, the rotating assembly includes a positioning shaft slidably connected inside two sliding grooves, a second push plate rotatably connected to the outer surface of the positioning shaft, and two springs fixedly connected to the side wall of the second push plate;

[0021] Two springs are fixedly connected to a movable plate at the end away from the push plate, and a connecting rod is rotatably connected to the side of the movable plate closer to the spring.

[0022] Among them, the second push plate is a triangular prism, the side wall of the moving plate is slidably connected to the inner wall of the placement groove, and the end of the connecting rod away from the moving plate is rotatably connected to the side wall of the second push plate.

[0023] Furthermore, the rotating assembly includes a fixed rod that is fixedly connected to the inner wall of the hydraulic rod, and a swing plate is rotatably connected to the outer surface of the fixed rod;

[0024] Several arc-shaped springs are fixedly connected to the side wall of the swing plate, and a fixed plate is fixedly connected to the end of the several arc-shaped springs away from the swing plate.

[0025] The end of the swing plate away from the fixed rod contacts the side wall of the second push plate, and the front and back of the fixed plate are fixedly connected to the inner wall of the placement groove.

[0026] Furthermore, the sliding assembly includes a push rod rotatably connected to the side of the swing plate near the push plate 2, a sliding bar rotatably connected to the end of the push rod away from the swing plate, and a baffle 2 slidably connected to the side wall of the sliding bar;

[0027] The side wall of the push rod is attached to the top of the second push plate, and the side wall of the second baffle is fixedly connected to the side wall of the placement groove.

[0028] Furthermore, a method for using an automatic feeding device for color printing of cartons, the method comprising the following steps:

[0029] S1: Connection and Fixing: Connect the higher side of the device to the cardboard lifting device, and the other side to the cardboard printing device;

[0030] S2: Start the correction: Start the device. After the device is started, the internal motor will drive the cardboard to move through the conveyor belt. At the same time, the cardboard will contact the side wall of the first baffle. When the cardboard moves, the first push plate will correct the cardboard through the push of the hydraulic rod.

[0031] S3: Conveying and feeding: The corrected cardboard will move into the color printing device in batches under the drive of the bottom conveyor belt, thereby completing the automatic feeding of cardboard boxes for color printing.

[0032] The present invention has the following beneficial effects:

[0033] (1) In this invention, when the positioning axis moves upward, it will drive the second push plate to move upward synchronously. Since the second push plate rotates around the positioning axis at this time, the side wall of the second push plate and the side wall of the first push plate are on the same plane when the second push plate moves upward. At this time, the side wall of the second push plate contacts the side wall of the stacked cardboard. Therefore, when the second push plate moves upward, a slight friction force will be generated and an upward force will be applied to the cardboard. This reduces the situation where the stacked cardboard moves to the color printing device through the conveyor belt at the top of the main body. Due to the tilted conveying of the cardboard, the cardboard at the bottom moves downward and contacts the bottom cardboard under the action of gravity, resulting in some cardboard creases. This keeps the side wall of the cardboard flat and improves the overall quality of the automatic color printing of cardboard by the device.

[0034] (2) In this invention, the side wall of the second push plate rotates and drives the connecting rod to move. When the connecting rod moves, it pushes the moving plate connected to it to slide upward inside the placement slot. Thus, when the second push plate moves upward, the movement of the moving plate keeps the spring in a horizontal state. This reduces the situation where the second push plate and the paperboard are in excessive contact and the paperboard bends due to the incorrect angle of the spring when the second push plate retracts after the second push plate retracts. This allows the second push plate to better correct the paperboard and improves the efficiency of the device for automatic color printing and feeding of paperboard.

[0035] (3) In this invention, when the second push plate rotates during reset, the side wall of the second push plate will apply a pushing force to the swing plate in contact with it, causing it to rotate around the fixed rod during reset. When the swing plate rotates during reset, it will push the arc spring on its side wall to contract on the fixed plate and accumulate potential energy, thereby reducing the force applied by the spring to the second push plate during reset. This reduces the situation where the second push plate quickly resets and contacts the side wall of the cardboard after it separates from the side wall of the cardboard, causing some of the side wall of the cardboard to be impacted and deformed. This ensures the stability of the second push plate during reset and further improves the overall quality of the automatic color printing and feeding of cardboard by the device.

[0036] (4) In this invention, when the push rod moves, it pushes the top sliding bar to slide on the second baffle, so that the top of the second push plate will push the cardboard that protrudes into the placement groove and is discharged outward under the action of the second push plate and the push rod. After the protruding cardboard is discharged, the second push plate will be on the same horizontal line as the side wall of the first push plate to correct the stacked cardboard. This reduces the situation where some tilted cardboard will enter the placement groove during the process of the second push plate rotating to correct the cardboard, which would affect the movement of the second push plate. This ensures the overall speed of cardboard conveying and further improves the efficiency of the device for automatic color printing and feeding of cardboard.

[0037] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0040] Figure 2 This is a schematic diagram of the overall partial cross-sectional structure of the present invention;

[0041] Figure 3 This is a diagram showing the connection relationships of the mobile components of the present invention;

[0042] Figure 4 This is a partial cross-sectional view of the limiting component of the present invention;

[0043] Figure 5 This is a partial cross-sectional view of the rotating component of the present invention;

[0044] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0045] Figure 7 This is a diagram showing the connection relationship of the rotating component of the present invention;

[0046] Figure 8 This is a partial cross-sectional view of the rotating component of the present invention;

[0047] Figure 9 This is a plan view of the rotating component of the present invention;

[0048] Figure 10 For the present invention Figure 9 Enlarged view of point B in the middle.

[0049] The attached diagram lists the components represented by each number as follows:

[0050] In the diagram: 1. Main body; 11. Moving component; 111. Sliding plate; 112. Hydraulic rod; 113. Support frame; 114. Baffle one; 12. Limiting component; 121. Push plate one; 122. Placement slot; 123. Sliding slot; 2. Pushing mechanism; 21. Rotating component; 211. Positioning shaft; 212. Push plate two; 213. Spring; 214. Moving plate; 215. Connecting rod; 22. Rotating component; 221. Fixed rod; 222. Swing plate; 223. Arc spring; 224. Fixed plate; 3. Buffering mechanism; 31. Sliding component; 311. Push rod; 312. Sliding bar; 313. Baffle two. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] Please see Figures 1-10 As shown, the present invention is an automatic feeding device for color printing of cardboard boxes and its usage method, comprising a main body 1, and further comprising:

[0053] Pushing mechanism 2 is installed inside the main body 1 and is used to push the cardboard when the main body 1 moves;

[0054] The buffer mechanism 3 is installed on the side wall of the push mechanism 2 to reduce the force generated when the push mechanism 2 is reset.

[0055] Entity 1 includes:

[0056] The movable component 11 is installed on the top of the main body 1 and is used to change its position according to the stress point of the cardboard.

[0057] Limiting component 12 is installed on the side wall of the moving component 11 and is used to move in the direction of the cardboard when the moving component 11 moves.

[0058] The driving body 2 includes:

[0059] Rotating component 21 is installed inside the limiting component 12 and is used to rotate during the contact between the limiting component 12 and the cardboard.

[0060] Rotating component 22 is installed inside the limiting component 12 and is used to rotate under the thrust of rotating component 21 when rotating component 21 moves.

[0061] Buffer mechanism 3 includes:

[0062] The sliding component 31 is installed on the side wall of the rotating component 22 and is used to slide by the thrust of the rotating component 22 when the rotating component 22 rotates.

[0063] The moving component 11 includes two sliding plates 111 slidably connected to the top of the main body 1, and a hydraulic rod 112 is fixedly connected to the top of the sliding plates 111;

[0064] The side walls of the two sliding plates 111 are fixedly connected to the support frame 113, and the side walls of the support frame 113 are fixedly connected to the baffle 114. Due to the drop between the conveyor belts of the main body 1, the cardboard will fall during the movement and come into contact with the baffle 114 on the support frame 113, and then accumulate on the conveyor belt at the top of the main body 1. At this time, the hydraulic rod 112 on the sliding plate 111 pushes the push plate 121 to correct the cardboard.

[0065] The limiting component 12 includes a push plate 121 fixedly connected to the output end of the hydraulic rod 112. The push plate 121 has a placement groove 122 on the side away from the hydraulic rod 112. The front and back of the placement groove 122 have sliding grooves 123. When the push plate 121 is pushed by the output end of the hydraulic rod 112 and moves towards the stacked cardboard, the push plate 212 located inside the placement groove 122 will contact the side wall of the stacked cardboard.

[0066] The rotating assembly 21 includes a positioning shaft 211 that is slidably connected inside two sliding grooves 123. A push plate 212 is rotatably connected to the outer surface of the positioning shaft 211. Two springs 213 are fixedly connected to the side wall of the push plate 212.

[0067] Two springs 213 are fixedly connected to a movable plate 214 at the end away from the push plate 212, and a connecting rod 215 is rotatably connected to the side of the movable plate 214 near the springs 213.

[0068] Among them, the push plate 212 is a triangular prism, the side wall of the moving plate 214 is slidably connected to the inner wall of the placement groove 122, and the end of the connecting rod 215 away from the moving plate 214 is rotatably connected to the side wall of the push plate 212. When the push plate 212 is subjected to a reaction force, it will rotate downward around the outer surface of the positioning shaft 211. When the push plate 212 rotates downward, the bottom is in contact with the top of the main body 1.

[0069] The rotating assembly 22 includes a fixed rod 221 fixedly connected to the inner wall of the hydraulic rod 112, and a swing plate 222 rotatably connected to the outer surface of the fixed rod 221;

[0070] A number of arc-shaped springs 223 are fixedly connected to the side wall of the swing plate 222, and a fixed plate 224 is fixedly connected to the end of the arc-shaped springs 223 away from the swing plate 222.

[0071] The end of the swing plate 222 away from the fixed rod 221 is in contact with the side wall of the push plate 212. The front and back of the fixed plate 224 are fixedly connected to the inner wall of the placement groove 122. When the swing plate 222 is reset and rotated, it will push the arc spring 223 on its side wall to contract on the fixed plate 224 and accumulate potential energy, thereby reducing the force exerted by the spring 213 on the push plate 212 when it is reset.

[0072] The sliding assembly 31 includes a push rod 311 rotatably connected to the side of the swing plate 222 near the push plate 212. The end of the push rod 311 away from the swing plate 222 is rotatably connected to a sliding strip 312. A baffle 313 is slidably connected to the side wall of the sliding strip 312.

[0073] The side wall of the push rod 311 is attached to the top of the push plate 212, and the side wall of the baffle 313 is fixedly connected to the side wall of the placement groove 122. When the swing plate 222 swings, it pushes the push rod 311 on its side wall to move. When the push rod 311 moves, it pushes the top sliding bar 312 to slide on the baffle 313, so that the top of the push plate 212 will partially protrude into the placement groove 122 and discharge it outward under the action of the push plate 212 and the push rod 311.

[0074] A method for using an automatic feeding device for color printing of cardboard boxes, the method comprising the following steps:

[0075] S1: Connection and Fixing: Connect the higher side of the device to the cardboard lifting device, and the other side to the cardboard printing device;

[0076] S2: Start the correction: Start the device. After the device is started, the internal motor will drive the cardboard to move through the conveyor belt. At the same time, the cardboard will contact the side wall of the baffle 114. When the cardboard moves, the push plate 121 will correct the cardboard through the push of the hydraulic rod 112.

[0077] S3: Conveying and feeding: The corrected cardboard will move into the color printing device in batches under the drive of the bottom conveyor belt, thereby completing the automatic feeding of cardboard boxes for color printing.

[0078] In use, first connect the higher side of the device to the cardboard lifting device, and the other side to the cardboard color printing device. Then start the device. After the device is started, the cardboard stacked on the lifting device will be piled on top of the main body 1 under the action of the lifting device. At this time, the main body 1 will move the cardboard towards the color printing device through the top conveyor belt. Due to the height difference between the conveyor belts of the main body 1, the cardboard will fall during the movement and come into contact with the baffle 114 on the support frame 113, and then accumulate on the top conveyor belt of the main body 1. At this time, the hydraulic rod 112 on the sliding plate 111 pushes the push plate 121 to correct the cardboard. The corrected cardboard will move steadily towards the color printing device under the drive of the conveyor belt, thereby completing the automatic feeding of the cardboard for subsequent color printing.

[0079] When the push plate 121 moves towards the stacked cardboard under the push of the output end of the hydraulic rod 112, the push plate 212 located inside the placement groove 122 will contact the side wall of the stacked cardboard and apply a pushing force to the side wall of the cardboard to keep it vertical. When the push plate 212 pushes the cardboard, it will be subjected to the reaction force from the cardboard. After the push plate 212 is subjected to the reaction force, it will rotate downward around the outer surface of the positioning shaft 211. When the push plate 212 rotates downward, its bottom is in contact with the top of the main body 1, which causes the push plate 212 as a whole to be subjected to the reaction force of the main body 1. At the same time, the positioning shaft 211 slides upward inside the sliding groove 123. When the positioning shaft 211 moves upward, it will drive the push plate 212 to move upward. 212 moves upward synchronously. As the second push plate 212 rotates around the positioning shaft 211, the side wall of the second push plate 212 is on the same plane as the side wall of the first push plate 121 when it moves upward. At this time, the side wall of the second push plate 212 contacts the side wall of the stacked cardboard. Therefore, a slight frictional force is generated when the second push plate 212 moves upward, and an upward force is applied to the cardboard. This reduces the situation where, when the stacked cardboard moves to the color printing device through the conveyor belt at the top of the main body 1, the cardboard at the bottom falls downward under the action of gravity and contacts the bottom cardboard, causing some cardboard to crease. This keeps the side wall of the cardboard flat and improves the overall quality of the automatic color printing and feeding of cardboard by the device.

[0080] When the push plate 212 rotates around the positioning shaft 211, its sidewall moves toward the moving plate 214. As the sidewall of the push plate 212 moves toward the moving plate 214, it applies a pushing force to the spring 213 in contact with it. The spring 213 contracts and recovers its potential energy after being pushed. Simultaneously, the sidewall of the push plate 212, during its rotation, drives the connecting rod 215 to move. The moving rod 215 pushes the moving plate 214 connected to it. 14 slides upward inside the placement groove 122, so that when the push plate 212 moves upward, the movement of the moving plate 214 keeps the spring 213 in a horizontal state. This reduces the situation where the push plate 212 pushes the spring 213 to contract, and the spring 213 returns to its original position due to the incorrect angle of the spring 213, which would cause the push plate 212 to make excessive contact with the paperboard and bend the paperboard. This allows the push plate 212 to better correct the paperboard and improves the efficiency of the device for automatic color printing and feeding of paperboard.

[0081] When the second push plate 212 rotates around the positioning shaft 211, the top of the second push plate 212 swings towards the side wall of the first push plate 121. Since the initial state of the arc spring 223 is in a contracted state, the side wall of the second push plate 212 will be pushed by the restoring potential energy of the arc spring 223 when the top of the second push plate 212 swings, which will enhance the force of the second push plate 212 when it rotates, so that the second push plate 212 can contact the side wall of the cardboard more easily. After the side wall of the second push plate 212 disengages from the cardboard, the bottom of the second push plate 212 will rotate in the opposite direction around the positioning shaft 211 under the restoring push of the spring 213. Since the pushing force of the restoring potential energy of the spring 213 is greater than the force required for the arc spring 223 to deform, the push plate 212 will rotate in the opposite direction. When the second plate 212 rotates during reset, the side wall of the second plate 212 will exert a pushing force on the swing plate 222 in contact with it, causing it to rotate around the fixed rod 221 during reset. When the swing plate 222 rotates during reset, it will push the arc spring 223 on its side wall to contract on the fixed plate 224 and accumulate potential energy, thereby reducing the force exerted by the spring 213 on the second plate 212 during reset. This reduces the situation where the second plate 212 quickly resets and contacts the side wall of the cardboard under the reset push of the spring 213 after it separates from the side wall of the cardboard, causing some of the side wall of the cardboard to be impacted and deformed. This ensures the stability of the second plate 212 during reset and further improves the overall quality of the automatic color printing and feeding of cardboard by the device.

[0082] As the second push plate 212 rotates, its sidewall gradually aligns with the sidewall of the first push plate 121. Simultaneously, the swing plate 222 swings towards the second push plate 212 under the action of the arc spring 223. During this swing, the swing plate 222 pushes the push rod 311 on its sidewall to move. As the push rod 311 moves, it pushes the top sliding bar 312 to slide on the second baffle 313, causing the top of the second push plate 212 to partially protrude into the cardboard placed in the slot 122. Under the action of push rod 311, the cardboard is discharged outward. After the protruding cardboard is discharged, push plate 212 will be on the same horizontal line as the side wall of push plate 121 to correct the stacked cardboard. This reduces the possibility that some tilted cardboard will enter the placement groove 122 during the cardboard correction process of push plate 212, which would affect the movement of push plate 212. This ensures the overall speed of cardboard conveying and further improves the efficiency of the device for automatic color printing and feeding of cardboard.

[0083] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic feeding device for color printing of cardboard boxes, comprising a main body (1), characterized in that, Also includes: A pushing mechanism (2) is installed inside the main body (1) and is used to push the cardboard when the main body (1) moves; A buffer mechanism (3) is installed on the side wall of the push mechanism (2) to reduce the force generated when the push mechanism (2) is reset.

2. The automatic feeding device for color printing of cardboard boxes according to claim 1, characterized in that: The main body (1) includes: A movable component (11) is installed on the top of the main body (1) and is used to change its position according to the stress point of the cardboard. A limiting component (12) is installed on the side wall of the moving component (11) for moving in the direction of the cardboard when the moving component (11) moves.

3. The automatic feeding device for color printing of cardboard boxes according to claim 2, characterized in that: The propulsion mechanism (2) includes: A rotating component (21) is installed inside the limiting component (12) and is used to rotate during the contact between the limiting component (12) and the cardboard. Rotating component (22) is installed inside the limiting component (12) and is used to rotate under the thrust of the rotating component (21) when the rotating component (21) moves.

4. The automatic feeding device for color printing of cardboard boxes according to claim 3, characterized in that: The buffer mechanism (3) includes: The sliding component (31) is installed on the side wall of the rotating component (22) and is used to slide by the thrust of the rotating component (22) when the rotating component (22) rotates.

5. The automatic feeding device for color printing of cardboard boxes according to claim 4, characterized in that: The moving component (11) includes two sliding plates (111) slidably connected to the top of the main body (1), and a hydraulic rod (112) is fixedly connected to the top of the sliding plates (111). The side walls of the two sliding plates (111) are fixedly connected to a support frame (113), and the side walls of the support frame (113) are fixedly connected to a baffle (114).

6. The automatic feeding device for color printing of cardboard boxes according to claim 5, characterized in that: The limiting component (12) includes a push plate (121) fixedly connected to the output end of the hydraulic rod (112). The push plate (121) has a placement groove (122) on the side away from the hydraulic rod (112). The front and back sides of the placement groove (122) have sliding grooves (123).

7. The automatic feeding device for color printing of cardboard boxes according to claim 6, characterized in that: The rotating assembly (21) includes a positioning shaft (211) slidably connected inside two sliding grooves (123), and a push plate (212) is rotatably connected to the outer surface of the positioning shaft (211). Two springs (213) are fixedly connected to the side wall of the push plate (212). A movable plate (214) is fixedly connected to one end of the two springs (213) away from the push plate (212), and a connecting rod (215) is rotatably connected to the side of the movable plate (214) near the springs (213). The second push plate (212) is a triangular prism, the side wall of the moving plate (214) is slidably connected to the inner wall of the placement groove (122), and the end of the connecting rod (215) away from the moving plate (214) is rotatably connected to the side wall of the second push plate (212).

8. The automatic feeding device for color printing of cardboard boxes according to claim 7, characterized in that: The rotating assembly (22) includes a fixed rod (221) fixedly connected to the inner wall of the hydraulic rod (112), and a swing plate (222) is rotatably connected to the outer surface of the fixed rod (221). A plurality of arc-shaped springs (223) are fixedly connected to the side wall of the swing plate (222), and a fixed plate (224) is fixedly connected to one end of the plurality of arc-shaped springs (223) away from the swing plate (222). The swing plate (222) is located away from the fixed rod (221) at one end, which is in contact with the side wall of the push plate (212), and the front and back sides of the fixed plate (224) are fixedly connected to the inner wall of the placement groove (122).

9. The automatic feeding device for color printing of cardboard boxes according to claim 7, characterized in that: The sliding assembly (31) includes a push rod (311) rotatably connected to the side of the swing plate (222) near the push plate (212), and a sliding strip (312) is rotatably connected to the end of the push rod (311) away from the swing plate (222), and a baffle (313) is slidably connected to the side wall of the sliding strip (312). The side wall of the push rod (311) is attached to the top of the push plate (212), and the side wall of the baffle (313) is fixedly connected to the side wall of the placement groove (122).

10. A method of using an automatic feeding device for color printing of cardboard boxes, characterized in that: The automatic cardboard box color printing feeding device as described in claim 9 includes the following steps: S1: Connection and Fixing: Connect the higher side of the device to the cardboard lifting device, and the other side to the cardboard printing device; S2: Start the correction: Start the device. After the device is started, the internal motor will drive the cardboard to move through the conveyor belt. At the same time, the cardboard will contact the side wall of the baffle (114). When the cardboard moves, the push plate (121) will correct the cardboard through the push of the hydraulic rod (112). S3: Conveying and feeding: The corrected cardboard will move into the color printing device in batches under the drive of the bottom conveyor belt, thereby completing the automatic feeding of cardboard boxes for color printing.

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