Cutting device and method for multi-layer corrugated board processing

Abstract

The invention belongs to the technical field of corrugated board cutting, and particularly relates to a cutting device and method for multi-layer corrugated board processing. The cutting device comprises a mounting frame, a plurality of conveying rollers are rotationally arranged in the mounting frame, a lifting frame is arranged on the mounting frame, a hydraulic lifting rod is connected between the lifting frame and the mounting frame, and a moving frame horizontally moves in the lifting frame; and a fixing frame is rotationally arranged in the middle of the moving frame, and a cutting blade is arranged at the bottom end of the fixing frame and is in transmission connection with a driving motor. The cutting blade deflects in a reciprocating mode in the transverse moving and cutting process, so that the situation that chippings are located at the cutting contact position, a cutting gap is abnormally enlarged, and the flatness of the edge of a cut finished product is affected is avoided, and the cutting operation effect is improved through movement of the cutting blade.

Description

Technical Field

[0001] The invention relates to the technical field of corrugated cardboard cutting, and in particular to a cutting device and method for processing multi-layer corrugated cardboard. Background Art

[0002] Corrugated cardboard is a multi-layer adhesive body. During the production and processing, the corrugated cardboard will be cross-cut according to actual needs.

[0003] Referring to a Chinese patent with patent announcement number CN111660344B, a dust reduction device for corrugated cardboard cutting is disclosed, including a bottom plate, legs, a guide plate, a sliding plate, a corrugated cardboard clamping and fixing device, a corrugated cardboard cutting dust reduction device and a placement screen, wherein a plurality of legs are mounted on the bottom plate, the guide plate is mounted on the plurality of legs, the sliding plate is slidably mounted on the guide plate, the corrugated cardboard clamping and fixing device is mounted on the sliding plate, the corrugated cardboard cutting dust reduction device is mounted on the bottom plate and the guide plate, and the placement screen is mounted on the bottom plate.

[0004] However, in the process of cutting with a saw blade, debris left at the contact position between the saw blade and the corrugated cardboard may cause excessive pulling of the cutting position of the corrugated cardboard during the mobile cutting process, thereby affecting the cutting effect. Summary of the invention

[0005] Based on the technical problems existing in the background technology, the present invention proposes a cutting device and method for multi-layer corrugated cardboard processing.

[0006] The present invention provides a cutting device for processing multi-layer corrugated cardboard, comprising a mounting frame, a plurality of conveying rollers are rotatably arranged in the mounting frame, a lifting frame is arranged on the mounting frame, a hydraulic lifting rod is connected between the lifting frame and the mounting frame, a moving frame is horizontally moved in the lifting frame, a fixed frame is rotatably arranged in the middle of the moving frame, a cutting blade is arranged at the bottom end of the fixed frame, and the cutting blade is transmission-connected to a driving motor.

[0007] Furthermore, the lifting frame is arranged parallel to the conveying roller, and the horizontal extension length of the lifting frame is greater than the width of the mounting frame. Notches are provided at positions at both ends of the mounting frame corresponding to the cutting blades. A slide groove is provided in the lifting frame, and the movable frame is slidably connected to the inner wall of the slide groove. An electric guide rail is installed on the top of the lifting frame, and a connecting frame is connected to the electric guide rail. The movable frame and the connecting frame are fixedly installed.

[0008] Furthermore, the bottom of the fixed frame is rotatably connected to a rotating shaft, the cutting blade is fixed at the middle position of the rotating shaft, the driving motor is horizontally installed at the top position of the fixed frame, and a synchronous belt is transmission-connected between the output shaft of the driving motor and one end of the rotating shaft.

[0009] Furthermore, positioning shafts are fixed on both sides of the fixing frame. Positioning holes are provided at positions on the inner wall of the moving frame corresponding to the positioning shafts. The outer wall of the positioning shaft is rotatably connected to the inner wall of the positioning hole through a torsion spring. One of the positioning shafts is located at the middle position of the synchronous belt. A gear is fixed on the outer wall of the positioning shaft on the side of the fixing frame away from the electric guide rail. A rack plate is fixed on one side of the top of the lifting frame close to the gear. A plurality of tooth block groups are installed on the top of the rack plate, and a plurality of tooth blocks meshing with the gear are arranged in the tooth block groups.

[0010] Furthermore, guide plate frames are fixed on the inner walls at both ends of the mounting frame. The width of the guide plate frame gradually increases in the moving conveying direction. Air cylinders are fixed on the outer sides at both ends of the mounting frame, and a limiting plate extending into the mounting frame is installed at one end of the air cylinder.

[0011] Furthermore, stabilizing components are arranged on both sides of the bottom of the lifting frame. A horizontally placed support plate is fixed at the position on the mounting frame corresponding to the stabilizing component, and the top of the support plate is flush with the top of the conveying roller.

[0012] Furthermore, the stabilizing component is provided with a horizontally placed fixed rod, which is arranged parallel to the conveying roller. Fixing blocks are installed at both ends of the fixed rod. Connecting rods are fixed on the tops of the fixing blocks. A connecting cylinder is slidably connected to the outer wall of the connecting rod. The top end of the connecting cylinder is fixedly connected to the lifting frame. A spring is connected between the top end of the connecting rod and the inner wall of the connecting cylinder. A plurality of pressure rollers are arranged below the fixed rod.

[0013] Furthermore, both ends of the pressure roller are rotatably connected to a connecting plate through bearings. The top of the connecting plate is rotatably connected to the fixed rod through a torsion spring. An auxiliary frame is installed below between the two connecting plates.

[0014] Furthermore, a first magnetic block is installed at a position on the auxiliary frame close to the cutting blade. Second magnetic blocks are installed at the bottom ends of both sides of the fixing frame. The first magnetic block and the second magnetic block repel each other magnetically.

[0015] A cutting method for processing multi-layer corrugated paperboard proposed by the present invention, according to the above-mentioned cutting device for processing multi-layer corrugated paperboard, includes the following steps: Step 1: The conveying roller feeds the paperboard below the cutting blade. The driving motor drives the cutting blade to rotate, and the hydraulic lifting rod drives the cutting blade to descend; Step 2: The electric guide rail drives the moving frame, the fixing frame and the cutting blade to horizontally move from one end of the lifting frame to the other end; Step 3: In Step 2, the positioning shafts on the fixing frame move horizontally accordingly, so that the gear on one of the positioning shafts continuously meshes with the spaced tooth block groups. When the gear meshes with the tooth block group, the fixing frame deflects around the positioning shaft.

[0016] The beneficial effects in the present invention are: 1. In the present invention, during the transverse movement and cutting process of the cutting blade, it reciprocally deflects, thereby continuously changing the position where the cutting blade contacts the cardboard, and through the inclined cutting of the cutting blade, the debris at the cutting contact position is thrown out, so as to prevent the abnormal expansion of the cutting gap caused by the debris at the cutting contact position and affect the flatness of the edge of the cut product, thereby improving the cutting operation effect through the movement setting of the cutting blade.

[0017] 2. In the present invention, on both sides of the cutting position, due to being close to the second magnet, the corresponding pressure rollers deflect outwards, and the cutting position is flattened by the pressure rollers deflecting outwards on both sides to prevent wrinkles from causing cutting deviation and affecting the cutting effect. When the cutting blade moves away, the pressure rollers deflecting outwards on both sides reset and deflect towards the middle position under the action of the torsion spring, so that both sides of the cut gap gather towards the middle position, preventing the uncontrolled tearing and expansion of the cardboard due to the cutting gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of a cutting device for processing multi - layer corrugated cardboard proposed by the present invention; Figure 2 is a schematic diagram of the position structure of the lifting frame of a cutting device for processing multi - layer corrugated cardboard proposed by the present invention; Figure 3 is a schematic diagram of the distribution structure of the moving frame and the stabilizing component of a cutting device for processing multi - layer corrugated cardboard proposed by the present invention; Figure 4 is a schematic diagram of the position structure of the moving frame of a cutting device for processing multi - layer corrugated cardboard proposed by the present invention; Figure 5 is a schematic diagram of the partial structure of the rack plate of a cutting device for processing multi - layer corrugated cardboard proposed by the present invention; Figure 6 is a schematic diagram of the structure of the guide plate frame of a cutting device for processing multi - layer corrugated cardboard proposed by the present invention; Figure 7 is a schematic diagram of the structure of the stabilizing component of a cutting device for processing multi - layer corrugated cardboard proposed by the present invention; Figure 8 is a schematic diagram of the position structure of the pressure roller of a cutting device for processing multi - layer corrugated cardboard proposed by the present invention.

[0019] In the figure: 1 mounting frame, 101 notch, 2 conveying roller, 3 cardboard, 4 lifting frame, 401 chute, 5 hydraulic lifting rod, 6 mounting plate, 7 electric guide rail, 8 moving frame, 9 connecting frame, 10 fixing frame, 11 positioning shaft, 12 rotating shaft, 13 cutting blade, 14 driving motor, 15 synchronous belt, 16 gear, 17 rack plate, 18 tooth block group, 19 guide plate frame, 20 cylinder, 21 limiting plate, 22 stabilizing component, 23 fixing rod, 24 fixing block, 25 connecting rod, 26 connecting cylinder, 27 connecting plate, 28 pressing roller, 29 auxiliary frame, 30 magnet one, 31 magnet two, 32 supporting plate. Detailed implementation mode

[0020] Example 1: Refer to Figures 1-6 , a cutting device for processing multi-layer corrugated cardboard, including a mounting frame 1. A plurality of equally spaced conveying rollers 2 are rotatably arranged in the mounting frame 1. The conveying rollers 2 are used for conveying the cardboard 3. A lifting frame 4 is arranged on the mounting frame 1. A hydraulic lifting rod 5 is connected between the lifting frame 4 and the mounting frame 1. The top end of the hydraulic lifting rod 5 is fixedly connected to the lifting frame 4. A mounting plate 6 is installed at a position corresponding to the hydraulic lifting rod 5 outside the mounting frame 1. The bottom end of the hydraulic lifting rod 5 is fixedly connected to the mounting plate 6. A moving frame 8 horizontally moves in the lifting frame 4. A fixing frame 10 is rotatably arranged in the middle of the moving frame 8. A cutting blade 13 is arranged at the bottom end of the fixing frame 10. The cutting blade 13 is drivingly connected to a driving motor 14. The cardboard 3 is sent to a corresponding position below the cutting blade 13 through the conveying roller 2. The cutting blade 13 is rotated by the driving motor 14, and the cutting blade 13 is lowered by the hydraulic lifting rod 5. The transverse movement of the cutting blade 13 is driven by the moving frame 8, and the reciprocating deflection of the cutting blade 13 is driven by the fixing frame 10, so that the cutting blade 13 descends for cutting during rotation, and the cutting blade 13 reciprocally deflects during the transverse cutting process, thereby continuously changing the position where the cutting blade 13 contacts the cardboard 3, and the debris at the cutting contact position is thrown out by the inclined cutting of the cutting blade 13, so as to avoid the abnormal expansion of the cutting gap caused by debris at the cutting contact position and affect the flatness of the edge of the cutting finished product. Therefore, the cutting operation effect is improved through the movement setting of the cutting blade 13.

[0021] In the present invention, the lifting frame 4 is arranged in parallel with the conveying roller 2, and the horizontal extension length of the lifting frame 4 is greater than the width of the mounting frame 1. Notches 101 are provided at the positions corresponding to the cutting blade 13 at both ends of the mounting frame 1, so that the descending cutting blade 13 can be horizontally moved or swung to the outside of the mounting frame 1 to ensure the complete cutting operation of the cardboard; a slide groove 401 is provided in the lifting frame 4, and the slide groove 401 is horizontally extended in the extension direction of the lifting frame 4. The moving frame 8 is slidably connected to the inner wall of the slide groove 401, and an electric guide rail 7 is installed on the top of the lifting frame 4. The electric guide rail 7 is parallel to the lifting frame 4, and a connecting frame 9 is connected to the electric guide rail 7. The moving frame 8 is fixedly installed between the connecting frame 9, and the moving frame 8 is auxiliary supported by the lifting frame 4, and the moving frame 8 is moved horizontally with the cutting blade 13 through the electric guide rail 7 to perform cutting operations, so as to ensure the stability of cross-cutting of the cardboard 3.

[0022] In the present invention, the bottom of the fixed frame 10 is rotatably connected with a horizontally placed rotating shaft 12, the cutting blade 13 is fixed at the middle position of the rotating shaft 12, the driving motor 14 is horizontally installed at the top position of the fixed frame 10, and a synchronous belt 15 is transmission-connected between the output shaft of the driving motor 14 and one end of the rotating shaft 12. The output shaft of the driving motor 14 and one end of the rotating shaft 12 are both installed with synchronous wheels, the synchronous belt 15 is connected between the two synchronous wheels, and one end of the rotating shaft 12 connected with the synchronous wheel extends to the outside of the fixed frame 10, and the output shaft of the driving motor 14 also extends to the outside of the fixed frame 10, so that the driving motor 14 and the cutting blade 13 are installed on the fixed frame 10, while ensuring that the driving motor 14 drives the cutting blade 13 to rotate, the driving motor 14 and the cutting blade 13 are lifted, moved and deflected with the fixed frame 10.

[0023] In the present invention, positioning shafts 11 are fixed on both sides of the fixing frame 10. Positioning holes are provided at positions on the inner wall of the moving frame 8 corresponding to the positioning shafts 11. The outer wall of the positioning shaft 11 and the inner wall of the positioning hole are rotationally connected through a torsion spring. One of the positioning shafts 11 is located at the middle position of the synchronous belt 15, and the positioning shaft 11 is smaller than the width between the inner walls of the synchronous belt 15, so that when the fixing frame 10 deflects around the positioning shaft 11, the synchronous belt 15 runs stably, ensuring that the cutting blade 13 rotates stably all the time when deflecting around the positioning shaft 11; the positioning shaft 11 on the side of the fixing frame 10 away from the electric guide rail 7 extends out of the moving frame 8, and the positioning shaft 11 is located above the outer wall of the top of the lifting frame 4. A gear 16 is fixed on the outer wall of the positioning shaft 11 on the side of the fixing frame 10 away from the electric guide rail 7. A rack plate 17 is fixed on one side of the top of the lifting frame 4 close to the gear 16. The rack plate 17 is arranged in parallel with the conveying roller 2. A plurality of tooth block groups 18 are installed on the top of the rack plate 17. A plurality of tooth blocks meshing with the gear 16 are arranged in the tooth block group 18. The top of the rack plate 17 between adjacent two tooth block groups 18 is arranged as a horizontal plane. After the rotating cutting blade 13 is lowered to a certain height through the hydraulic lifting rod 5 and the bottom of the cutting blade 13 penetrates below the cardboard 3, in the initial state, the fixing frame 10 extends vertically downward under the action of the torsion spring, and the cutting blade 13 is in the directly below position; the electric guide rail 7 drives the moving frame 8 and the cutting blade 13 to move horizontally. When the moving frame 8 drives the fixing frame 10 and the positioning shaft 11 to move horizontally, when the gear 16 on the positioning shaft 11 approaches the tooth block group 18 on the rack plate 17, the cutting blade 13 deflects through the meshing of the gear 16 and the tooth block group 18. When the positioning shaft 11 is between adjacent two tooth block groups 18, the cutting blade 13 resets under the action of the torsion spring and deflects reciprocally until it returns to the vertical state, so as to realize that the cutting blade 13 moves horizontally for cutting operations and deflects reciprocally around the positioning shaft 11, thereby continuously changing the contact position between the cutting blade 13 and the cardboard 3 and ensuring the stability of the cutting position, and avoiding the abnormal expansion or deviation of the cutting position from affecting the quality of the cutting finished product.

[0024] In the present invention, guide plate frames 19 are fixed on the inner walls at both ends of the mounting frame 1. The width of the guide plate frame 19 gradually increases in the moving conveying direction, so as to correct the deviation and limit the cardboard 3 fed into the working station through the guide plate frames 19 distributed at both ends of the mounting frame 1; air cylinders 20 are fixed on the outer sides at both ends of the mounting frame 1. A limiting plate 21 extending into the mounting frame 1 is installed at one end of the air cylinder 20. The limiting plate 21 is located at one side position of the cutting blade 13. The cardboard 3 is conveyed from the cutting blade 13 towards the limiting plate 21. The edge of the conveyed cardboard 3 abuts against the outer wall of the limiting plate 21 through the extended limiting plate 21, and the two ends and both sides of the cardboard 3 horizontally placed on the conveying roller 2 are kept flush in cooperation with the guide frame 19, thereby improving the accuracy of cross-cutting.

[0025] A cutting method for processing multi-layer corrugated cardboard. According to the above-mentioned cutting device for processing multi-layer corrugated cardboard, it includes the following steps: Step 1: The conveying roller 2 feeds the cardboard 3 under the cutting blade 13. The driving motor 14 drives the cutting blade 13 to rotate, and the hydraulic lifting rod 5 drives the cutting blade 13 to descend below the cardboard 3. Step 2: The electric guide rail 7 drives the moving frame 8, the fixing frame 10 and the cutting blade 13 to horizontally move from one end of the lifting frame 4 to the other end. Step 3: In Step 2, the positioning shaft 11 on the fixing frame 10 moves horizontally accordingly, so that the gear 16 on one of the positioning shafts 11 continuously meshes with the spaced tooth block groups 18. When the gear 16 meshes with the tooth block group 18, the fixing frame 10 deflects around the positioning shaft 11. When the gear 16 does not mesh with the tooth block group 18, the fixing frame 10 rotates back to its original position, so that the cutting blade 13 reciprocally deflects during the cross-cutting process to improve the cutting effect.

[0026] Example 2: Refer to Figures 1-8 , a cutting device for processing multi-layer corrugated cardboard. On the basis of Example 1, stable components 22 are arranged on both sides of the bottom of the lifting frame 4. A horizontally placed support plate 32 is fixed at the position corresponding to the stable component 22 in the mounting frame 1. The top of the support plate 32 is flush with the top of the conveying roller 2. The stable component 22 is provided with a horizontally placed fixing rod 23, and the fixing rod 23 is arranged parallel to the conveying roller 2. Fixing blocks 24 are installed at both ends of the fixing rod 23. A vertically upward extending connecting rod 25 is fixed to the top of the fixing block 24. A connecting cylinder 26 is slidably connected to the outer wall of the connecting rod 25. The top end of the connecting cylinder 26 is fixedly connected to the lifting frame 4. A spring is connected between the top end of the connecting rod 25 and the inner wall of the connecting cylinder 26. A plurality of pressure rollers 28 are arranged below the fixing rod 23, and the pressure rollers 28 are arranged parallel to the fixing rod 23. When the cutting blade 13 descends for cutting, the pressure rollers 28 abut against the position corresponding to the support plate 32 at the top of the cardboard 3, so as to press and limit the position of the to-be-cut sewing line through the pressure rollers 28 distributed on both sides, to ensure the stability of both sides of the cardboard cutting, thereby improving the accuracy and effectiveness of cutting.

[0027] In the present invention, both ends of the pressure roller 28 are rotatably connected to the connecting plates 27 through bearings. The top of the connecting plates 27 is rotatably connected to the fixed rod 23 through torsion springs. Below between the two connecting plates 27, an auxiliary frame 29 is installed. At a position of the auxiliary frame 29 close to the cutting blade 13, a first magnetic block 30 is embedded. At the bottom ends of both sides of the fixed frame 10, a second magnetic block 31 is embedded. The first magnetic block 30 and the second magnetic block 31 repel each other magnetically. During the non-cutting process, the fixed rod 23 and the auxiliary frame 29 naturally fall and are placed, and the second magnetic block 31 on the fixed frame 10 is located above and away from the auxiliary frame 29. During the cutting process, as the cutting blade 13 descends, the vertical distance between the second magnetic block 31 and the first magnetic block 30 continuously decreases. Then, when the cutting blade 13 moves horizontally for cutting, the corresponding pressure roller 28 deflects outward on both sides of the cutting position because it is close to the second magnetic block 31. Under the action of the spring between the connecting rod 25 and the connecting cylinder 26, the pressure roller 28 can always be kept in contact with the surface of the cardboard 3, so as to flatten the cutting position through the pressure rollers 28 deflected outward on both sides, avoiding wrinkles that may cause cutting deviation and affecting the cutting effect. When the cutting blade 13 moves away, the pressure rollers 28 deflected outward on both sides deflect back towards the middle position under the action of the torsion springs, so that both sides of the cut gap move towards the middle position, avoiding uncontrolled tearing and expansion of the cardboard 3 due to the cut gap, thereby improving the stability and effectiveness of cutting and ensuring the neatness of the edges of the cut finished product.

[0028] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A cutting device for processing multi-layer corrugated cardboard, comprising a mounting frame (1), in which a plurality of conveying rollers (2) are rotatably arranged, a lifting frame (4) is arranged on the mounting frame (1), and a hydraulic lifting rod (5) is connected between the lifting frame (4) and the mounting frame (1). A moving frame (8) horizontally moves in the lifting frame (4), characterized in that, A fixing frame (10) is rotatably arranged in the middle of the moving frame (8). A cutting blade (13) is arranged at the bottom end of the fixing frame (10). The cutting blade (13) is drivingly connected to a driving motor (14). An electric guide rail (7) is installed at the top of the lifting frame (4). A connecting frame (9) is connected to the electric guide rail (7). The moving frame (8) is fixedly installed between the connecting frame (9). Positioning shafts (11) are fixed on both sides of the fixing frame (10). Positioning holes are opened at positions corresponding to the positioning shafts (11) on the inner wall of the moving frame (8). The outer wall of the positioning shaft (11) and the inner wall of the positioning hole are rotationally connected through a torsion spring. A gear (16) is fixed on the outer wall of the positioning shaft (11) on the side of the fixing frame (10) away from the electric guide rail (7). A rack plate (17) is fixed on the top of the lifting frame (4) close to the gear (16). A plurality of tooth block groups (18) are installed on the top of the rack plate (17). A plurality of tooth blocks meshing with the gear (16) are arranged in the tooth block groups (18), so that the cutting blade (13) moves horizontally for cutting operations and reciprocally deflects around the positioning shaft (11), thereby continuously changing the contact position between the cutting blade (13) and the cardboard.

2. The cutting device for processing multi-layer corrugated paperboard according to claim 1, characterized in that, The lifting frame (4) is arranged parallel to the conveying roller (2), and the horizontal extension length of the lifting frame (4) is greater than the width of the mounting frame (1). Notches (101) are opened at positions corresponding to the cutting blade (13) at both ends of the mounting frame (1). A sliding groove (401) is opened in the lifting frame (4). The moving frame (8) is slidably connected to the inner wall of the sliding groove (401).

3. The cutting device for processing multi-layer corrugated paperboard according to claim 2, characterized in that, A rotating shaft (12) is rotatably connected to the bottom of the fixing frame (10). The cutting blade (13) is fixed at the middle position of the rotating shaft (12). The driving motor (14) is horizontally installed at the top position of the fixing frame (10). A synchronous belt (15) is drivingly connected between the output shaft of the driving motor (14) and one end of the rotating shaft (12).

4. A cutting device for processing multi-layer corrugated cardboard according to claim 3, characterized in that, One of the positioning shafts (11) is located at the middle position of the synchronous belt (15).

5. A cutting device for processing multi-layer corrugated paperboards according to any one of claims 1 to 4, characterized in that, Guide plate frames (19) are fixed on the inner walls at both ends of the mounting frame (1). The width of the guide plate frames (19) gradually increases in the moving conveying direction. Cylinders (20) are fixed on the outer sides at both ends of the mounting frame (1). A limiting plate (21) extending into the mounting frame (1) is installed at one end of the cylinder (20).

6. A cutting device for processing multi-layer corrugated cardboard according to any one of claims 1 to 4, characterized in that, Stabilizing components (22) are arranged on both sides of the bottom of the lifting frame (4). A horizontally placed supporting plate (32) is fixed at a position corresponding to the stabilizing components (22) in the mounting frame (1). The top of the supporting plate (32) is flush with the top of the conveying roller (2).

7. A cutting device for processing multi-layer corrugated paperboard according to claim 6, characterized in that, The stable component (22) is provided with a horizontally placed fixed rod (23), the fixed rod (23) is arranged in parallel with the conveying roller (2), both ends of the fixed rod (23) are provided with fixed blocks (24), a connecting rod (25) is fixed at the top of the fixed block (24), a connecting cylinder (26) is slidably connected to the outer wall of the connecting rod (25), the top end of the connecting cylinder (26) is fixedly connected to the lifting frame (4), a spring is connected between the top end of the connecting rod (25) and the inner wall of the connecting cylinder (26), and a plurality of pressure rollers (28) are arranged below the fixed rod (23).

8. A cutting device for processing multi-layer corrugated cardboard according to claim 7, characterized in that, Both ends of the pressure roller (28) are rotatably connected with a connecting plate (27) through bearings, the top of the connecting plate (27) is rotatably connected with the fixed rod (23) through a torsion spring, and an auxiliary frame (29) is installed below between the two connecting plates (27).

9. A cutting device for processing multi-layer corrugated cardboard according to claim 8, characterized in that, A first magnet (30) is installed at a position of the auxiliary frame (29) close to the cutting blade (13), second magnets (31) are installed at the bottom ends of both sides of the fixed frame (10), and the first magnet (30) and the second magnets (31) repel each other magnetically.

10. A cutting method for processing multi-layer corrugated cardboard, according to a cutting device for processing multi-layer corrugated cardboard described in claim 4, characterized in that, It includes the following steps: Step 1: The conveying roller (2) feeds the cardboard (3) below the cutting blade (13), the driving motor (14) drives the cutting blade (13) to rotate, and the hydraulic lifting rod (5) drives the cutting blade (13) to descend; Step 2: The electric guide rail (7) drives the moving frame (8), the fixed frame (10) and the cutting blade (13) to horizontally move from one end of the lifting frame (4) to the other end; Step 3: In Step 2, the positioning shaft (11) on the fixed frame (10) horizontally moves accordingly, so that the gear (16) on one of the positioning shafts (11) continuously meshes with the spaced-tooth block groups (18), and the fixed frame (10) deflects around the positioning shaft (11) when the gear (16) meshes with the tooth block group (18).

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