Cutting device and method for processing multi-layer corrugated cardboard

Abstract

The present invention belongs to the technical field of corrugated cardboard cutting, and in particular, relates to a cutting device and method for processing multi-layer corrugated cardboard. The device comprises a mounting frame, a plurality of conveyor rollers being rotatably mounted within the mounting frame, a lifting frame being mounted on the mounting frame, a hydraulic lifting rod being connected between the lifting frame and the mounting frame, a movable frame being horizontally movable within the lifting frame, a fixed frame being rotatably mounted in the middle of the movable frame, a cutting blade being disposed at the bottom end of the fixed frame, and a drive motor being connected to the cutting blade. The present invention causes the cutting blade to reciprocate during the lateral movement and cutting process, thereby preventing debris from forming at the cutting contact position, causing an abnormal expansion of the cutting gap and affecting the smoothness of the edge of the cut product. The cutting effect is thereby improved by the movement of the cutting blade.

Description

Technical Field

[0001] The present invention relates to the technical field of corrugated cardboard cutting, 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, and during the production process, the corrugated cardboard will be cross-cut according to actual needs.

[0003] Referring to the Chinese patent with patent publication number CN111660344B, a dust reduction device for corrugated cardboard cutting is disclosed, which includes a base plate, legs, guide rails, a sliding plate, a corrugated cardboard clamping and fixing device, a corrugated cardboard cutting dust reduction device and a placement mesh plate. The base plate is installed with a number of legs, the guide rails are installed on the legs, the sliding plate is slidably installed on the guide rails, the corrugated cardboard clamping and fixing device is installed on the sliding plate, the corrugated cardboard cutting dust reduction device is installed on the base plate and the guide rails, and the placement mesh plate is installed on the base 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 corrugated cardboard cutting position 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 processing multi-layer corrugated cardboard.

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

[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 both ends of the mounting frame at positions 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 to 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 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 fixed frame, and positioning holes are opened at positions on the inner wall of the movable frame corresponding to the positioning shafts. The outer wall of the positioning shaft and the inner wall of the positioning hole are rotatably connected by a torsion spring. One of the positioning shafts is located in the middle position of the synchronous belt, and a gear is fixed on the outer wall of the positioning shaft located on the side of the fixed frame away from the electric guide rail. A rack plate is fixed on the side of the top of the lifting frame close to the gear, and a plurality of tooth block groups are installed on the top of the rack plate, and a plurality of tooth blocks meshing with the gears are arranged in the tooth block group.

[0010] Furthermore, guide plates are fixed to the inner walls of both ends of the mounting frame, and the width of the guide plates gradually increases toward the moving conveying direction. Cylinders are fixed to the outer sides of both ends of the mounting frame, and a limit plate extending into the mounting frame is installed at one end of the cylinder.

[0011] Furthermore, stabilizing components are provided on both sides of the bottom of the lifting frame, and a horizontally placed support plate is fixed at a position in 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 assembly is provided with a horizontally placed fixed rod, which is arranged parallel to the conveying roller, and fixed blocks are installed at both ends of the fixed rod, and a connecting rod is fixed on the top of the fixed block. The outer wall of the connecting rod is slidably connected to a connecting tube, and the top of the connecting tube is fixedly connected to the lifting frame. A spring is connected between the top of the connecting rod and the inner wall of the connecting tube, and a plurality of pressure rollers are arranged below the fixed rod.

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

[0014] Furthermore, a first magnetic block is installed near the cutting blade of the auxiliary frame, and a second magnetic block is installed at the bottom ends of both sides of the fixed frame, and the first magnetic block and the second magnetic block repel each other.

[0015] The present invention proposes a cutting method for processing multi-layer corrugated cardboard, based on the above-mentioned cutting device for processing multi-layer corrugated cardboard, comprising the following steps:

[0016] Step 1: The conveyor roller feeds the cardboard under the cutting blade, the driving motor drives the cutting blade to rotate, and the hydraulic lifting rod drives the cutting blade down;

[0017] Step 2: The electric guide rail carries the movable frame, the fixed frame and the cutting blade to move horizontally from one end of the lifting frame to the other end;

[0018] In step 3 and step 2, the positioning shaft on the fixed frame moves horizontally, 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 fixed frame deflects around the positioning shaft.

[0019] The beneficial effects of the present invention are:

[0020] 1. In the present invention, the cutting blade deflects back and forth during the lateral movement and cutting process, thereby continuously changing the contact position between the cutting blade and the cardboard, and the cutting blade cuts obliquely to throw away the debris at the cutting contact position, thereby preventing the debris from causing an abnormal expansion of the cutting gap at the cutting contact position and affecting the flatness of the edge of the cut product, thereby improving the cutting effect through the movement setting of the cutting blade.

[0021] 2. In the present invention, the pressure rollers on both sides of the cutting position are deflected outward because they are close to the second magnetic block. The cutting position is flattened by the pressure rollers on both sides that are deflected outward, so as to avoid wrinkles that cause cutting deviation and affect the cutting effect. When the cutting blade moves away, the pressure rollers on both sides that are deflected outward are reset and deflected toward the middle position under the action of the torsion spring, so that the two sides of the cut gap are gathered toward the middle position, thereby avoiding uncontrolled tearing and expansion of the cardboard due to the cutting gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a cutting device for processing multi-layer corrugated cardboard proposed by the present invention;

[0023] Figure 2 This is a schematic diagram of the position structure of the lifting frame of a cutting device for multi-layer corrugated cardboard processing proposed by the present invention;

[0024] Figure 3 This is a schematic diagram of the distribution structure of the moving frame and stabilizing components of a cutting device for multi-layer corrugated cardboard processing proposed by the present invention;

[0025] Figure 4 This is a schematic diagram of the position structure of a moving frame of a cutting device for multi-layer corrugated cardboard processing proposed by the present invention;

[0026] Figure 5 This is a partial structural diagram of a rack plate of a cutting device for processing multi-layer corrugated cardboard proposed by the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of a guide frame of a cutting device for multi-layer corrugated cardboard processing proposed by the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the stable components of a cutting device for multi-layer corrugated cardboard processing proposed by the present invention;

[0029] Figure 8 This is a schematic diagram of the structure of the pressure roller positions of a cutting device for multi-layer corrugated cardboard processing proposed by the present invention.

[0030] In the figure: 1 mounting frame, 101 notch, 2 conveyor roller, 3 cardboard, 4 lifting frame, 401 slide, 5 hydraulic lifting rod, 6 mounting plate, 7 electric guide rail, 8 moving frame, 9 connecting frame, 10 fixed frame, 11 positioning shaft, 12 rotating shaft, 13 cutting blade, 14 driving motor, 15 synchronous belt, 16 gear, 17 rack plate, 18 gear block group, 19 guide plate frame, 20 cylinder, 21 limit plate, 22 stabilizing assembly, 23 fixing rod, 24 fixing block, 25 connecting rod, 26 connecting cylinder, 27 connecting plate, 28 pressure roller, 29 auxiliary frame, 30 magnetic block 1, 31 magnetic block 2, 32 support plate. DETAILED DESCRIPTION

[0031] Example 1: Reference Figure 1-6 A cutting device for processing multi-layer corrugated cardboard includes a mounting frame 1, in which a plurality of equally spaced conveying rollers 2 are rotatably arranged, and the conveying rollers 2 are used to convey cardboard 3. A lifting frame 4 is provided on the mounting frame 1, and a hydraulic lifting rod 5 is connected between the lifting frame 4 and the mounting frame 1. The top of the hydraulic lifting rod 5 is fixedly connected to the lifting frame 4, and a mounting plate 6 is installed at a position corresponding to the hydraulic lifting rod 5 on the outside of 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 is horizontally movable in the lifting frame 4, and a fixed frame 10 is rotatably arranged in the middle of the moving frame 8. A cutting blade 13 is provided at the bottom end of the fixed frame 10, and the cutting blade 13 is connected to a drive motor 14 for transmission, and the cardboard 3 is sent to the cutting plate through the conveying roller 2. The corresponding position below the blade 13 is rotated by the driving motor 14, and the cutting blade 13 is lowered by the hydraulic lifting rod 5. The cutting blade 13 is moved horizontally by the moving frame 8, and the cutting blade 13 is reciprocally deflected by the fixing frame 10, so that the cutting blade 13 is lowered for cutting during the rotation operation, and the cutting blade 13 is reciprocated during the horizontal movement and cutting process, thereby continuously changing the contact position between the cutting blade 13 and the cardboard 3, and the inclined cutting of the cutting blade 13 is used to throw out the debris at the cutting contact position, thereby avoiding the abnormal expansion of the cutting gap caused by debris at the cutting contact position and affecting the flatness of the edge of the cut product, thereby improving the cutting operation effect through the movement setting of the cutting blade 13.

[0032] In the present invention, 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 provided at both ends of the mounting frame 1 at positions corresponding to the cutting blade 13, so that the descending cutting blade 13 can move horizontally or swing to the outside of the mounting frame 1 to ensure complete cutting 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 electric guide rail 7 is used to enable the moving frame 8 to move horizontally with the cutting blade 13 to perform cutting operations to ensure the stability of cross-cutting of the cardboard 3.

[0033] In the present invention, the bottom of the fixed frame 10 is rotatably connected to a horizontally placed rotating shaft 12, the cutting blade 13 is fixed to the middle position of the rotating shaft 12, and the driving motor 14 is horizontally installed at the top position of the fixed frame 10. A synchronous belt 15 is connected to 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. 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.

[0034] In the present invention, positioning shafts 11 are fixed on both sides of the fixed frame 10, and positioning holes are opened at positions corresponding to the positioning shafts 11 on the inner wall of the movable frame 8. The outer wall of the positioning shaft 11 is rotatably connected to the inner wall of the positioning hole by a torsion spring. One of the positioning shafts 11 is located in 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 the synchronous belt 15 runs stably when the fixed frame 10 deflects around the positioning shaft 11, thereby ensuring that the cutting blade 13 always rotates stably when it deflects around the positioning shaft 11; The positioning shaft 11 on the side away from the electric guide rail 7 extends outward from the moving frame 8. The positioning shaft 11 is located above the outer wall of the top of the lifting frame 4. A gear 16 is fixed to the outer wall of the positioning shaft 11 on the side of the fixed frame 10 away from the electric guide rail 7. A rack plate 17 is fixed on the side of the top of the lifting frame 4 close to the gear 16. The rack plate 17 is arranged parallel to 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 is located between two adjacent gear blocks. The block groups 18 are arranged in a horizontal plane. After the rotating cutting blade 13 is lowered to a certain height by the hydraulic lifting rod 5 so that the bottom of the cutting blade 13 penetrates below the cardboard 3, the fixed frame 10 is extended vertically downward under the action of the torsion spring in the initial state, and the cutting blade 13 is in a position directly below. The electric guide rail 7 moves the moving frame 8 and the cutting blade 13 horizontally, and the moving frame 8 moves the fixed frame 10 and the positioning shaft 11 horizontally. When the gear 16 on the positioning shaft 11 approaches the gear block group 18 on the rack plate 17, When the cutting blade 13 is deflected by the meshing of the gear 16 and the tooth block group 18, and when the positioning shaft 11 is between two adjacent tooth block groups 18, the cutting blade 13 is reset and reciprocally deflected under the action of the torsion spring until it returns to a vertical state, thereby realizing the horizontal movement of the cutting blade 13 for cutting and reciprocatingly deflecting around the positioning shaft 11 at the same time, thereby constantly changing the contact position between the cutting blade 13 and the cardboard 3, thereby ensuring the stability of the cutting position and avoiding abnormal expansion or deviation of the cutting position that affects the quality of the cut product.

[0035] In the present invention, guide plates 19 are fixed to the inner walls at both ends of the mounting frame 1, and the width of the guide plates 19 gradually increases in the direction of movement and conveying, so that the cardboard 3 sent to the work station can be corrected and limited by the guide plates 19 distributed at both ends of the mounting frame 1; cylinders 20 are fixed to the outer sides of both ends of the mounting frame 1, and one end of the cylinder 20 is installed with a limit plate 21 extending into the mounting frame 1, and the limit plate 21 is located on one side of the cutting blade 13. The cardboard 3 is conveyed from the cutting blade 13 toward the limit plate 21, and the edge of the conveyed cardboard 3 is abutted against the outer wall of the limit plate 21 by the extended limit plate 21, and the two ends and two sides of the cardboard 3 horizontally placed on the conveying roller 2 are kept flush with the guide frame 19, thereby improving the accuracy of cross-cutting.

[0036] A cutting method for processing multi-layer corrugated cardboard, based on the above-mentioned cutting device for processing multi-layer corrugated cardboard, comprises the following steps:

[0037] Step 1: The conveying roller 2 feeds the cardboard 3 to the bottom of 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 down to the bottom of the cardboard 3;

[0038] Step 2: The electric guide rail 7 carries the movable frame 8, the fixed frame 10 and the cutting blade 13 and moves horizontally from one end of the lifting frame 4 to the other end;

[0039] In step three and step two, the positioning shaft 11 on the fixed frame 10 moves horizontally, so that the gear 16 on one of the positioning shafts 11 continuously engages with the spaced tooth block groups 18. When the gear 16 engages with the tooth block group 18, the fixed frame 10 deflects around the positioning shaft 11. When the gear 16 is not engaged with the tooth block group 18, the fixed frame 10 rotates and resets, thereby reciprocatingly deflecting the cutting blade 13 during the cross-cutting process to improve the cutting effect.

[0040] Example 2: Reference Figure 1-8 A cutting device for processing multi-layer corrugated cardboard, based on embodiment 1, is provided with stabilizing components 22 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 stabilizing component 22 in the mounting frame 1, and the top of the support plate 32 is flush with the top of the conveyor roller 2, and the stabilizing component 22 is provided with a horizontally placed fixing rod 23, and the fixing rod 23 is arranged parallel to the conveyor roller 2, and both ends of the fixing rod 23 are provided with fixing blocks 24, and the top of the fixing block 24 is fixed with a connecting rod 25 extending vertically upward, and the outer wall of the connecting rod 25 is slidably connected to the fixing rod 23. It is connected to a connecting tube 26, the top of which is fixedly connected to the lifting frame 4, a spring is connected between the top of the connecting rod 25 and the inner wall of the connecting tube 26, and a plurality of pressure rollers 28 are provided below the fixed rod 23. The pressure rollers 28 are arranged parallel to the fixed rod 23, so that when the cutting blade 13 descends for cutting, the pressure rollers 28 are against the position corresponding to the top of the cardboard 3 and the support plate 32, so that the position of the seam to be cut is pressed down and limited by the pressure rollers 28 distributed on both sides, so as to ensure the stability of both sides of the cardboard cutting, thereby improving the accuracy and effectiveness of cutting.

[0041] In the present invention, both ends of the pressure roller 28 are rotatably connected to the connecting plate 27 through a bearing, and the top of the connecting plate 27 is rotatably connected to the fixed rod 23 through a torsion spring. An auxiliary frame 29 is installed below the two connecting plates 27. A magnetic block 1 30 is embedded in the auxiliary frame 29 near the cutting blade 13. A magnetic block 2 31 is embedded at the bottom end of both sides of the fixed frame 10. There is magnetic repulsion between the magnetic block 1 30 and the magnetic block 2 31. During the non-cutting process, the fixed rod 23 and the auxiliary frame 29 naturally fall and are placed, while the magnetic block 2 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 magnetic block 2 31 and the magnetic block 1 30 continues to decrease. Then, when the cutting blade 13 moves laterally for cutting, the two sides of the cutting position are close to the magnetic block 2 31, causing the corresponding pressure rollers 28 to deflect outward. Under the action of the spring between the connecting rod 25 and the connecting cylinder 26, the pressure rollers 28 can always be kept in contact with the surface of the cardboard 3, so that the cutting position is flattened by the pressure rollers 28 deflected outward on both sides, avoiding wrinkles that cause cutting deviation and affect the cutting effect; and when the cutting blade 13 moves away, the pressure rollers 28 deflected outward on both sides are reset and deflected toward the middle position under the action of the torsion spring, so that the two sides of the cut gap are gathered toward the middle position, avoiding uncontrolled tearing and expansion of the cardboard 3 due to the cutting gap, thereby improving the stability and effectiveness of cutting and ensuring the neatness of the edges of the cut product.

[0042] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A cutting device for processing multi-layer corrugated cardboard, comprising a mounting frame (1), a plurality of conveying rollers (2) being rotatably arranged in the mounting frame (1), a lifting frame (4) being arranged on the mounting frame (1), a hydraulic lifting rod (5) being connected between the lifting frame (4) and the mounting frame (1), a movable frame (8) being horizontally movable in the lifting frame (4), characterized in that: A fixed frame (10) is provided in the middle of the movable frame (8) for rotation. A cutting blade (13) is provided at the bottom end of the fixed frame (10). The cutting blade (13) is connected to a driving motor (14). An electric guide rail (7) is provided on the top of the lifting frame (4). A connecting frame (9) is connected to the electric guide rail (7). The movable frame (8) and the connecting frame (9) are fixedly installed. Positioning shafts (11) are fixed on both sides of the fixed frame (10). Positioning holes are provided on the inner wall of the movable frame (8) at positions corresponding to the positioning shafts (11). The outer wall of the positioning shafts (11) and the inner wall of the positioning holes are connected. The two parts are connected by a torsion spring, and a gear (16) is fixed to the outer wall of the positioning shaft (11) on the side of the fixed frame (10) away from the electric guide rail (7). A rack plate (17) is fixed to the side of 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 provided in the tooth block group (18), so that the cutting blade (13) can move horizontally to perform cutting operations and reciprocate around the positioning shaft (11) at the same time, thereby continuously changing the contact position between the cutting blade (13) and the cardboard.

2. A cutting device for processing multi-layer corrugated cardboard 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 provided at positions corresponding to the cutting blades (13) at both ends of the mounting frame (1). A sliding groove (401) is provided in the lifting frame (4), and the movable frame (8) is slidably connected to the inner wall of the sliding groove (401).

3. A cutting device for processing multi-layer corrugated cardboard according to claim 2, characterized in that: The bottom of the fixed frame (10) is rotatably connected to a 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 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 in the middle of the timing belt (15).

5. A cutting device for processing multi-layer corrugated cardboard according to any one of claims 1 to 4, characterized in that: Guide plates (19) are fixed to the inner walls of both ends of the mounting frame (1), and the width of the guide plates (19) gradually increases toward the moving conveying direction. Cylinders (20) are fixed to the outer sides of both ends of the mounting frame (1), and 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 provided on both sides of the bottom of the lifting frame (4), and a horizontally placed support plate (32) is fixed at a position corresponding to the stabilizing component (22) in the mounting frame (1), and the top of the support plate (32) is flush with the top of the conveying roller (2).

7. A cutting device for processing multi-layer corrugated cardboard according to claim 6, characterized in that: The stabilizing assembly (22) is provided with a horizontally placed fixing rod (23), the fixing rod (23) is arranged parallel to the conveying roller (2), both ends of the fixing rod (23) are installed with fixing blocks (24), the top of the fixing block (24) is fixed with a connecting rod (25), the outer wall of the connecting rod (25) is slidably connected to a connecting cylinder (26), 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 provided below the fixing 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 to a connecting plate (27) via a bearing. The top of the connecting plate (27) is rotatably connected to the fixed rod (23) via a torsion spring. An auxiliary frame (29) is installed below the two connecting plates (27).

9. A cutting device for processing multi-layer corrugated cardboard according to claim 8, characterized in that: A magnetic block 1 (30) is installed at a position of the auxiliary frame (29) close to the cutting blade (13), and a magnetic block 2 (31) is installed at the bottom ends of both sides of the fixed frame (10), and the magnetic block 1 (30) and the magnetic block 2 (31) repel each other magnetically.

10. A cutting method for processing multi-layer corrugated cardboard, wherein the cutting device for processing multi-layer corrugated cardboard according to claim 4 is characterized in that: The following steps are involved: Step 1: The conveying roller (2) delivers the cardboard (3) to the bottom of 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) carries the movable frame (8), the fixed frame (10) and the cutting blade (13) and moves horizontally from one end of the lifting frame (4) to the other end; In step 3 and step 2, the positioning shaft (11) on the fixed frame (10) moves horizontally, so that the gear (16) on one of the positioning shafts (11) continuously engages with the tooth block groups (18) distributed at intervals. When the gear (16) engages with the tooth block group (18), the fixed frame (10) deflects around the positioning shaft (11).

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