A paperboard die cut structure

Abstract

The utility model relates to paperboard die -cutting device technical field, specifically disclose a paperboard die -cutting structure, including die -cutting roller, a plurality of slotting mechanism, slotting pitch adjusting mechanism, cutting angle mechanism, cutting angle pitch adjusting mechanism, through setting the second slotting cutter and second cutting corner blade of slidable, and the special slotting pitch adjusting mechanism and cutting angle pitch adjusting mechanism of matching, can according to the specification requirement of paperboard to be processed, adjust the interval between first slotting cutter and second slotting cutter, and the interval between third cutting corner blade and fourth cutting corner blade. This design breaks through the limitation of traditional fixed gap type cutter, makes a set of die -cutting structure to be able to adapt to a variety of different board high specification paperboard production, significantly improves the versatility and processing flexibility of equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of cardboard die-cutting devices, and in particular to a cardboard die-cutting structure. Background Technology

[0002] Die-cutting machines are key post-processing equipment in the cardboard packaging and printing industry. The die-cutting structure is the core component of the die-cutting machine. It uses multiple sets of grooving and corner-cutting mechanisms pre-set on the die-cutting rollers to press out specific shapes of scratches or cuts on the cardboard, thereby separating the finished product from the waste material and completing the die-cutting process.

[0003] In the prior art, such as the grooving mechanism of the die-cutting section disclosed in Chinese Patent Publication No. CN204773779U, a grooving roller is provided on the die-cutting section. A number of detachable annular fasteners are provided at intervals along the axial direction on the outer circumferential surface of the grooving roller. A grooving knife is provided on the annular fastener. The annular grooving knife is provided with a notch so that the standardized cardboard is not die-cut when it passes through the notch position, so as to leave a part of the standardized cardboard that does not need to be die-cut.

[0004] However, in the above structure, the notch of the annular grooving knife is fixed and cannot be adjusted, making it difficult to adapt to grooving different sizes of cardboard.

[0005] Therefore, the above problems urgently need to be solved. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a cardboard die-cutting structure to solve the above problems.

[0007] A cardboard die-cutting structure, comprising: Die-cutting rollers; Multiple grooving mechanisms are arranged along the axial direction of the die-cutting roller. Each grooving mechanism includes a grooving knife holder sleeved on the die-cutting roller, and a first grooving knife and a second grooving knife disposed on the grooving knife holder. The first grooving knife and the second grooving knife have an arc-shaped structure. The first grooving knife is fixed to the grooving knife holder, and the second grooving knife is slidably disposed on the grooving knife holder so that the distance between the first grooving knife and the second grooving knife is adjustable. The grooving spacing adjustment mechanism includes a first arc-shaped internal rack that is slidably arranged around the central axis of the grooving cutter holder, a first adjusting gear that meshes with the first arc-shaped internal rack, and a splined shaft that connects all the first adjusting gears in series. The first arc-shaped internal rack is fixedly connected to the second grooving cutter. The corner cutting mechanism includes a corner cutting blade holder sleeved on the die-cutting roller, and a first corner cutting blade, a second corner cutting blade, a third corner cutting blade bent and connected to one end of the first corner cutting blade, and a fourth corner cutting blade bent and connected to one end of the second corner cutting blade, all disposed on the corner cutting blade holder. The first corner cutting blade and the second corner cutting blade have an arc-shaped structure, while the third corner cutting blade and the fourth corner cutting blade have a rectangular structure. The first corner cutting blade is fixed to the corner cutting blade holder, and the second corner cutting blade is slidably disposed on the corner cutting blade holder so that the distance between the third corner cutting blade and the fourth corner cutting blade is adjustable. The corner cutting distance adjustment mechanism includes a second arc-shaped internal rack that is slidably arranged around the central axis of the corner cutting tool holder, a second adjusting gear that meshes with the second arc-shaped internal rack, the second arc-shaped internal rack being fixedly connected to the second corner cutting blade, and the spline shaft also engaging with the keyway of the second adjusting gear.

[0008] Specifically, the first grooving cutter includes two first arc-shaped blades arranged in parallel and spaced apart, and a first connecting blade connecting one end of the two first arc-shaped blades, with the first connecting blade facing the side of the second grooving cutter. The second grooving cutter includes two parallel and spaced second arc-shaped blades and a second connecting blade connecting one end of the two second arc-shaped blades, with the second connecting blade facing the side of the first grooving cutter.

[0009] Specifically, the cardboard die-cutting structure further includes: The trimming mechanism includes a trimming knife holder sleeved on the die-cutting roller and an annular trimming blade fixed on the trimming knife holder.

[0010] Specifically, the surface of the die-cutting roller is provided with a clearance groove for inserting the spline shaft.

[0011] Specifically, the die-cutting roller is provided with a planetary gear set and a motor drive assembly at one end along the axial direction, and a transmission gear is connected to one end of the spline shaft along the axial direction. The motor drive assembly is driven by the planetary gear set, and the planetary gear set is driven by the transmission gear. The die-cutting roller is provided with a bearing mounting bracket at the other end along the axial direction, and a first bearing is provided on the bearing mounting bracket. The splined shaft is installed on the inner ring of the first bearing at the other end along the axial direction.

[0012] Specifically, the motor drive assembly includes a geared motor, a drive pulley connected to the output shaft of the geared motor, a driven pulley connected to the drive pulley via a belt, a first transmission shaft coaxially connected to the driven pulley, and a first adjustment gear disposed at one end of the first transmission shaft.

[0013] Specifically, the other end of the first drive shaft is equipped with an encoder for detecting its rotation angle.

[0014] Specifically, the planetary gear set includes: A second adjusting gear is rotatably mounted on one end of the die-cutting roller via a first bearing. The second adjusting gear meshes with the transmission gear and has an axially extending extension. A third adjusting gear is rotatably disposed at one end of the die-cutting roller, and the third adjusting gear is axially fixedly connected to the second adjusting gear; A first bearing housing, wherein a second bearing is provided inside the first bearing housing, and the inner ring of the second bearing is fitted onto the extension portion; The first sun gear, which is mounted on one end of the die-cutting roller, is rotated via the third bearing. The first bridge gear meshes with the third adjusting gear and the first sun gear on both sides along the axial direction; The first gear disk gear, which is rotatably mounted on one end of the die-cutting roller via the fourth bearing, meshes with the first adjustment gear. Multiple first planetary gears are rotatably mounted on the first gear disk gear via a fifth bearing. The first planetary gears mesh with the first sun gear and are circumferentially distributed around the central axis of the first sun gear. The second sun gear, which is located at one end of the die-cutting roller, is rotated; Multiple second planetary gears are rotatably mounted on the first gear disk via a sixth bearing. The second planetary gears mesh with the second sun gear and are circumferentially distributed around the central axis of the second sun gear.

[0015] The beneficial effects of this utility model are: 1. The cardboard die-cutting structure of this application, by setting a sliding second slotting blade and a second corner-cutting blade, and equipped with a dedicated slotting distance adjustment mechanism and a corner-cutting distance adjustment mechanism, can adjust the distance between the first and second slotting blades, as well as the distance between the third and fourth corner-cutting blades, according to the specifications of the cardboard to be processed. This design breaks through the limitations of traditional fixed notch-type blades, enabling a single die-cutting structure to adapt to the production of various cardboard heights and specifications, significantly improving the versatility and processing flexibility of the equipment; 2. The slotting spacing adjustment mechanism drives all the first adjusting gears in series via a splined shaft, and the corner cutting spacing adjustment mechanism also drives the second adjusting gear via the same splined shaft. When the splined shaft rotates, it simultaneously drives the second slotting blades in all slotting mechanisms and the second corner cutting blades in the corner cutting mechanism to move synchronously. This linkage design ensures that the parameters of all corresponding stations on the die-cutting roller can be changed in one adjustment, which is not only simple to operate and saves time and effort, but also effectively ensures the consistency of the slotting and corner cutting spacings along the width of the cardboard, thereby improving the forming quality and dimensional accuracy of the product. Attached Figure Description

[0016] Figure 1 This is a perspective view of the cardboard die-cutting structure of this application; Figure 2 This is a cross-sectional view of the cardboard die-cutting structure of this application; Figure 3 This is a partial structural diagram of the cardboard die-cutting structure of this application; Figure 4 This is a schematic diagram of the cardboard structure; Figure 5 This is a perspective view of the cardboard die-cutting structure of this application, omitting the die-cutting rollers. Figure 6 A perspective view of the trimming mechanism of this application; Figure 7 This is a perspective view of the annular trimming blade of this application; Figure 8 This is a perspective view of the grooving mechanism and the grooving spacing adjustment mechanism of this application; Figure 9 This is a perspective view of the first and second grooving tools of this application; Figure 10 This is a perspective view of the chamfering mechanism and the chamfering distance adjustment mechanism of this application; Figure 11 This is a perspective view of the first, second, third, and fourth corner cutting blades of this application.

[0017] The attached figures are labeled as follows: die-cutting roller 10, grooving mechanism 20, grooving cutter holder 21, first grooving cutter 22, second grooving cutter 23, grooving spacing adjustment mechanism 30, first arc-shaped internal rack 31, first adjusting gear 32, spline shaft 33, corner cutting mechanism 40, corner cutting cutter holder 41, first corner cutting blade 42, second corner cutting blade 43, third corner cutting blade 44, fourth corner cutting blade 45, corner cutting spacing adjustment mechanism 50, second arc-shaped internal rack 51, second adjusting gear 52, first arc-shaped blade 221, first connecting blade 222, second arc-shaped blade 231, second connecting blade 232. 60. Trimming mechanism, 61. Trimming blade holder, 62. Ring trimming blade, 11. Clearance groove, 70. Planetary gear set, 80. Motor drive assembly, 331. Transmission gear, 12. Bearing mounting bracket, 13. First bearing, 81. Gearbox, 82. Drive pulley, 83. Driven pulley, 84. First drive shaft, 85. First adjustment gear, 86. Encoder, 71. Second adjustment gear, 72. Third adjustment gear, 73. First bearing housing, 74. First sun gear, 75. First bridge gear, 76. First gear disc gear, 77. First planetary gear, 78. Second sun gear, 79. Second planetary gear, 90. Cardboard. Detailed Implementation

[0018] This utility model provides a cardboard die-cutting structure. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0019] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0020] Please refer to Figures 1 to 11This embodiment discloses a cardboard die-cutting structure, which can be installed in a die-cutting machine for grooving and corner cutting of cardboard 90. The cardboard die-cutting structure includes a die-cutting roller 10, multiple grooving mechanisms 20 arranged axially along the die-cutting roller 10, a grooving spacing adjustment mechanism 30 for adjusting the distance between the first grooving blade 22 and the second grooving blade 23 in the grooving mechanism 20, a corner cutting mechanism 40 disposed on the die-cutting roller 10, and a corner cutting spacing adjustment mechanism 50 for adjusting the distance between the third corner cutting blade 44 and the fourth corner cutting blade 45 in the corner cutting mechanism 40. When the cardboard 90 is conveyed over the cardboard die-cutting structure, the rotating die-cutting roller 10 drives the grooving mechanism 20 and the corner cutting mechanism 40 to rotate, thereby grooving and corner cutting on the cardboard 90 using the grooving mechanism 20 and the corner cutting mechanism 40. The grooving line and the corner cutting line can be referenced... Figure 4 The dashed part in the text.

[0021] like Figure 5 As shown, the die-cutting roller 10 has multiple grooving mechanisms 20 arranged axially. Each grooving mechanism 20 includes a grooving knife holder 21 sleeved on the die-cutting roller 10, and a first grooving knife 22 and a second grooving knife 23 disposed on the grooving knife holder 21. The first grooving knife 22 and the second grooving knife 23 have an arc-shaped structure. The first grooving knife 22 is fixed to the grooving knife holder 21, and the second grooving knife 23 is slidably disposed on the grooving knife holder 21 so that the distance between the first grooving knife 22 and the second grooving knife 23 is adjustable. The distance between the first grooving knife 22 and the second grooving knife 23 in the grooving mechanism 20 determines the board height of the formed cardboard 90, which can be adjusted accordingly according to the board height of different types of cardboard 90. Through this structural design, the position of the second grooving knife 23 can be adjusted, thereby changing the distance between the first grooving knife 22 and the second grooving knife 23 to adapt to the board height requirements of different cardboard 90.

[0022] like Figure 8 As shown, the grooving spacing adjustment mechanism 30 includes a first arc-shaped internal rack 31 slidably arranged around the central axis of the grooving cutter holder 21, a first adjusting gear 32 meshing with the first arc-shaped internal rack 31, and a splined shaft 33 connecting all the first adjusting gears 32 in series. The first arc-shaped internal rack 31 is fixedly connected to the second grooving cutter 23. All the first adjusting gears 32 are linked by the splined shaft 33. When the splined shaft 33 rotates, all the first adjusting gears 32 rotate synchronously, causing the first arc-shaped internal rack 31 to slide and adjust its position, thereby pushing the second grooving cutter 23 to move, thus adjusting the spacing between the first grooving cutter 22 and the second grooving cutter 23. The structure is ingeniously designed.

[0023] Please refer to Figure 10 and Figure 11The corner-cutting mechanism 40 includes a corner-cutting blade holder 41 sleeved on the die-cutting roller 10, and a first corner-cutting blade 42, a second corner-cutting blade 43, a third corner-cutting blade 44 bent and connected to one end of the first corner-cutting blade 42, and a fourth corner-cutting blade 45 bent and connected to one end of the second corner-cutting blade 43, all mounted on the corner-cutting blade holder 41. The first corner-cutting blade 42 and the second corner-cutting blade 43 have an arc-shaped structure, while the third corner-cutting blade 44 and the fourth corner-cutting blade 45 have a rectangular structure. The first corner-cutting blade 42 is fixed to the corner-cutting blade holder 41, and the second corner-cutting blade 43 is slidably mounted on the corner-cutting blade holder 41 so that the distance between the third corner-cutting blade 44 and the fourth corner-cutting blade 45 is adjustable. The distance between the third corner-cutting blade 44 and the fourth corner-cutting blade 45 in the corner-cutting mechanism 40 also determines the height of the formed cardboard 90, which can be adjusted accordingly based on the height of different types of cardboard 90. This structural design allows for adjustment of the position of the fourth cutting blade 45, thereby changing the distance between the third cutting blade 44 and the fourth cutting blade 45 to accommodate different board height requirements of different cardboard 90.

[0024] Please refer to Figure 10 The corner cutting distance adjustment mechanism 50 includes a second arc-shaped internal rack 51 slidably disposed around the central axis of the corner cutting blade holder 41, and a second adjusting gear 52 meshing with the second arc-shaped internal rack 51. The second arc-shaped internal rack 51 is fixedly connected to the second corner cutting blade 43, and the spline shaft 33 also engages with the second adjusting gear 52 via a keyway. When the spline shaft 33 rotates, it drives the second adjusting gear 52 to rotate synchronously through the keyway connection. The second adjusting gear 52 drives the second arc-shaped internal rack 51, which in turn drives the second corner cutting blade 43 to move, thereby changing the distance between the third corner cutting blade 44 and the fourth corner cutting blade 45. This achieves synchronous adjustment of the corner cutting distance, ensuring the consistency of the 90mm board height for different specifications of cardboard.

[0025] Please refer to Figure 9 The first grooving knife 22 includes two parallel and spaced first arc-shaped blades 221 and a first connecting blade 222 connecting one end of the two first arc-shaped blades 221. The first connecting blade 222 is positioned facing the second grooving knife 23. With this design, when the first grooving knife 22 rotates to cut the cardboard 90, a "U"-shaped groove is formed sequentially at the front end of the cardboard 90, and the waste paper is cut off, reducing the subsequent cutting process.

[0026] The second grooving knife 23 includes two parallel and spaced second arc-shaped blades 231 and a second connecting blade 232 connecting one end of the two second arc-shaped blades 231. The second connecting blade 232 is positioned facing the first grooving knife 22. With this design, when the second grooving knife 23 rotates to cut the cardboard 90, an inverted "U"-shaped groove is formed sequentially at the rear end of the cardboard 90, and the waste paper is cut off, reducing subsequent cutting processes.

[0027] The cardboard die-cutting structure also includes a trimming mechanism 60, which is used to trim the edges of the cardboard 90. The trimming line can be referenced as follows: Figure 4 The leftmost dotted line in the diagram shows the trimming mechanism 60, which includes a trimming knife holder 61 sleeved on the die-cutting roller 10 and an annular trimming blade 62 fixed on the trimming knife holder 61. When the cardboard 90 is conveyed through the trimming mechanism 60, the annular trimming blade 62 trims one side of the cardboard 90.

[0028] like Figure 1 As shown, the surface of the die-cutting roller 10 is provided with a relief groove 11 for inserting the spline shaft 33, so that the arrangement of the spline shaft 33 is more reasonable.

[0029] like Figure 3 As shown, the die-cutting roller 10 has a planetary gear set 70 and a motor drive assembly 80 at one end along the axial direction. A transmission gear 331 is connected to one end of the splined shaft 33 along the axial direction. The motor drive assembly 80 is connected to the planetary gear set 70, and the planetary gear set 70 is connected to the transmission gear 331. A bearing mounting bracket 12 is provided at the other end of the die-cutting roller 10 along the axial direction. A first bearing 13 is mounted on the bearing mounting bracket 12, and the splined shaft 33 is mounted on the inner ring of the first bearing 13 at the other end along the axial direction. When the grooving or chamfering spacing needs to be adjusted, the motor drive assembly 80 operates, transmitting power to the transmission gear 331 through the planetary gear set 70, causing the splined shaft 33 to rotate. The bearing mounting bracket 12 and the first bearing 13 provide stable distal support for the splined shaft 33, ensuring the coaxiality and stability of the splined shaft 33 during long-span rotation, thereby ensuring that the spacing adjustments of all grooving mechanisms 20 and chamfering mechanisms 40 can be performed synchronously and precisely. like Figure 3 As shown, the motor drive assembly 80 includes a geared motor 81, a drive pulley 82 connected to the output shaft of the geared motor 81, a driven pulley 83 connected to the drive pulley 82 via a belt, a first transmission shaft 84 coaxially connected to the driven pulley 83, and a first adjustment gear 85 disposed at one end of the first transmission shaft 84. The geared motor 81 provides power, and the belt drive mechanism composed of the drive pulley 82, the belt, and the driven pulley 83 performs speed reduction and power transmission, driving the first transmission shaft 84 to rotate, which in turn drives the first adjustment gear 85 to rotate. The belt drive has a buffering and vibration-absorbing function, making the adjustment process run smoothly.

[0030] Furthermore, the other end of the first drive shaft 84 is equipped with an encoder 86 for detecting its rotation angle. The encoder 86 is used to detect the rotation angle of the first drive shaft 84 in real time and feed the signal back to the control system, thereby precisely controlling the rotation of the geared motor 81, realizing precise control of the rotation angle of the spline shaft 33, and ultimately ensuring the adjustment accuracy of the slotting and chamfering distance. like Figure 3 As shown, the planetary gear set 70 includes a second adjusting gear 71, a third adjusting gear 72, a first bearing housing 73, a first sun gear 74, a first intermediate gear 75, a first gear disc gear 76, multiple first planetary gears 77, a second sun gear 78, and multiple second planetary gears 79. The second adjusting gear 71 is rotatably mounted on one end of the die-cutting roller 10 via a first bearing, and meshes with the transmission gear 331. The second adjusting gear 71 has an axially extending extension. The third adjusting gear 72 is rotatably mounted on one end of the die-cutting roller 10, and is axially fixedly connected to the second adjusting gear 71. A second bearing is housed within the first bearing housing 73, and the inner ring of the second bearing is fitted into the extension. The first sun gear 74 is rotatably mounted on one end of the die-cutting roller 10 via a third bearing. The first intermediate gear 75 meshes with the third adjusting gear 72 and the first sun gear 74 on both sides along the axial direction. A disk gear 76 is rotatably mounted on one end of the die-cutting roller 10 via a fourth bearing, and the first disk gear 76 meshes with the first adjustment gear 85; a plurality of first planetary gears 77 are rotatably mounted on the first disk gear 76 via a fifth bearing, and the first planetary gears 77 mesh with the first sun gear 74 and are circumferentially distributed around the central axis of the first sun gear 74; a second sun gear 78 is rotatably mounted on one end of the die-cutting roller 10; a plurality of second planetary gears 79 are rotatably mounted on the first disk gear 76 via a sixth bearing, and the second planetary gears 79 mesh with the second sun gear 78 and are circumferentially distributed around the central axis of the second sun gear 78.

[0031] The operating principle of the planetary gear set 70 is as follows: The motor drive assembly 80 drives the first adjustment gear 85 to rotate, which in turn drives the first gear disk gear 76 meshing with it to rotate. The first gear disk gear 76 drives the first planetary gear 77 and the second planetary gear 79 on it to revolve around the axis of the die-cutting roller 10. When the die-cutting roller 10 itself is not rotating, the revolution of the first planetary gear 77 will drive the first sun gear 74 to rotate. The power is transmitted to the third adjustment gear 72 through the first bridge gear 75, which then drives the second adjustment gear 71 to rotate. Finally, the transmission gear 331 drives the spline shaft 33 to rotate, thereby realizing the spacing adjustment. This planetary gear set 70 constitutes a differential system. Its technical effect is that it enables the motor drive assembly 80 to independently drive the spline shaft 33 to perform the adjustment operation when the die-cutting roller 10 is stationary. The adjustment process does not interfere with the main production process, thus improving the automation level and operating efficiency of the equipment. The preferred embodiments of this utility model have been described in detail above. However, this invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this invention.

Claims

1. A cardboard die-cutting structure, characterized in that, include: Die-cutting roller (10); Multiple grooving mechanisms (20) are arranged along the axial direction of the die-cutting roller (10). Each grooving mechanism (20) includes a grooving knife holder (21) sleeved on the die-cutting roller (10), and a first grooving knife (22) and a second grooving knife (23) disposed on the grooving knife holder (21). The first grooving knife (22) and the second grooving knife (23) have an arc-shaped structure. The first grooving knife (22) is fixed to the grooving knife holder (21), and the second grooving knife (23) is slidably disposed on the grooving knife holder (21) so that the distance between the first grooving knife (22) and the second grooving knife (23) is adjustable. The grooving spacing adjustment mechanism (30) includes a first arc-shaped internal rack (31) slidably arranged around the central axis of the grooving cutter holder (21), a first adjusting gear (32) meshing with the first arc-shaped internal rack (31), and a splined shaft (33) that connects all the first adjusting gears (32) in series. The first arc-shaped internal rack (31) is fixedly connected to the second grooving cutter (23). The corner cutting mechanism (40) includes a corner cutting knife holder (41) sleeved on the die-cutting roller (10), a first corner cutting blade (42), a second corner cutting blade (43), a third corner cutting blade (44) bent and connected to one end of the first corner cutting blade (42), and a fourth corner cutting blade (45) bent and connected to one end of the second corner cutting blade (43). The first corner cutting blade (42) and the second corner cutting blade (43) have an arc-shaped structure, and the third corner cutting blade (44) and the fourth corner cutting blade (45) have a rectangular structure. The first corner cutting blade (42) is fixed to the corner cutting knife holder (41), and the second corner cutting blade (43) is slidably disposed on the corner cutting knife holder (41) so that the distance between the third corner cutting blade (44) and the fourth corner cutting blade (45) is adjustable. The corner spacing adjustment mechanism (50) includes a second arc-shaped internal rack (51) slidably arranged around the central axis of the corner cutting blade holder (41), and a second adjusting gear (52) meshing with the second arc-shaped internal rack (51). The second arc-shaped internal rack (51) is fixedly connected to the second corner cutting blade (43), and the spline shaft (33) also engages with the keyway of the second adjusting gear (52).

2. The cardboard die-cutting structure according to claim 1, characterized in that, The first grooving cutter (22) includes two first arc-shaped blades (221) arranged in parallel and spaced apart, and a first connecting blade (222) connecting one end of the two first arc-shaped blades (221). The first connecting blade (222) is arranged facing the second grooving cutter (23). The second grooving cutter (23) includes two parallel and spaced second arc-shaped blades (231) and a second connecting blade (232) connecting one end of the two second arc-shaped blades (231). The second connecting blade (232) is positioned toward the side of the first grooving cutter (22).

3. The cardboard die-cutting structure according to claim 1, characterized in that, The cardboard die-cutting structure also includes: The trimming mechanism (60) includes a trimming knife holder (61) sleeved on the die-cutting roller (10) and an annular trimming blade (62) fixed on the trimming knife holder (61).

4. The cardboard die-cutting structure according to claim 1, characterized in that, The die-cutting roller (10) has a clearance groove (11) on its surface for inserting the spline shaft (33).

5. The cardboard die-cutting structure according to claim 1, characterized in that, The die-cutting roller (10) is provided with a planetary gear set (70) and a motor drive assembly (80) at one end along the axial direction. The spline shaft (33) is connected to a transmission gear (331) at one end along the axial direction. The motor drive assembly (80) is connected to the planetary gear set (70) in a transmission connection. The planetary gear set (70) is connected to the transmission gear (331) in a transmission connection. The die-cutting roller (10) is provided with a bearing mounting bracket (12) at the other end along the axial direction. A first bearing (13) is provided on the bearing mounting bracket (12). The spline shaft (33) is installed on the inner ring of the first bearing (13) at the other end along the axial direction.

6. The cardboard die-cutting structure according to claim 5, characterized in that, The motor drive assembly (80) includes a geared motor (81), a drive pulley (82) connected to the output shaft of the geared motor (81), a driven pulley (83) connected to the drive pulley (82) via a belt, a first transmission shaft (84) coaxially connected to the driven pulley (83), and a first adjustment gear (85) disposed at one end of the first transmission shaft (84).

7. A cardboard die-cutting structure according to claim 6, characterized in that, The other end of the first drive shaft (84) is provided with an encoder (86) for detecting its rotation angle.

8. The cardboard die-cutting structure according to claim 6, characterized in that, The planetary gear set (70) includes: The second adjusting gear (71) is rotatably mounted on one end of the die-cutting roller (10) via the first bearing. The second adjusting gear (71) meshes with the transmission gear (331). The second adjusting gear (71) has an axially extending extension. The third adjusting gear (72) is rotatably disposed at one end of the die-cutting roller (10), and the third adjusting gear (72) is axially fixedly connected to the second adjusting gear (71); A first bearing housing (73) is provided inside the first bearing housing (73), and the inner ring of the second bearing is fitted onto the extension portion; The first sun gear (74) located at one end of the die-cutting roller (10) is rotated by the third bearing. The first bridge gear (75) meshes with the third adjusting gear (72) and the first sun gear (74) on both sides along the axial direction; The first gear disk gear (76) located at one end of the die-cutting roller (10) is rotated by the fourth bearing, and the first gear disk gear (76) meshes with the first adjustment gear (85); Multiple first planetary gears (77) are rotatably mounted on the first gear disk gear (76) via a fifth bearing. The first planetary gears (77) mesh with the first sun gear (74) and are circumferentially distributed around the central axis of the first sun gear (74). Rotate the second sun gear (78) located at one end of the die-cutting roller (10); Multiple second planetary gears (79) are rotatably mounted on the first gear disk gear (76) via a sixth bearing. The second planetary gears (79) mesh with the second sun gear (78) and are circumferentially distributed around the central axis of the second sun gear (78).

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