Special-shaped anti-fake round knife die-cutting equipment with pull thread

Abstract

The application discloses a special-shaped anti-fake pull line round knife die-cutting equipment, belongs to the technical field of cigarette box pull line processing, and comprises a mounting ring and a plurality of elastic clamping units, the mounting ring is installed in a mounting groove, the mounting ring is sleeved on a roller shaft, and the plurality of elastic clamping units are arranged in the mounting ring. The application is a special-shaped anti-fake pull line round knife die-cutting equipment, a plurality of groups of uniformly distributed elastic clamping units are arranged in the mounting ring, elastic floating clamping of the roller shaft is realized, the clamping force can be accurately quantitatively adjusted through a pre-tightening bolt, the problems of rotation jamming of the roller shaft or insufficient clamping force slipping caused by traditional rigid clamping are avoided, and the stability and coaxiality of the knife roller rotation are significantly improved.

Description

Technical Field

[0001] This application relates to the field of cigarette box pull tab processing technology, and in particular to a circular die-cutting device for irregular anti-counterfeiting pull tabs. Background Technology

[0002] The existing cigarette packaging film opening structure involves a pull cord around the opening of the cigarette box. To open the cigarette, simply pull the end of the cord, stretch it along the cord, and rotate it around the cigarette box once to split the packaging film in two and open the packaging. This structure is simple and convenient, and has been used ever since. However, with the further development of the packaging industry, this structure also has some shortcomings and drawbacks. The existing pull cord structure has a straight side, resulting in less shear force on the film. During the stretching process, the film's cross-section often deviates from the pull cord, damaging the outer packaging film, which is detrimental to the waterproofing of the cigarette box and also affects its appearance. Moreover, the existing pull cord structures all have straight sides, making them indistinguishable across different manufacturers. In today's diversified and personalized packaging landscape, businesses no longer limit their requirements for packaging to practicality but also demand innovation and uniqueness. Furthermore, the technology for producing straight-side pull cord structures is already quite mature, and many small packaging plants can produce them without any technical difficulty. However, most cigarette pack drawstrings currently have straight edges, resulting in poor anti-counterfeiting features and easy counterfeiting. Existing irregularly shaped drawstrings are mostly produced using flat die-cutting, which suffers from low speed, easy material breakage, high waste, poor precision, and inability to achieve continuous high-speed production. Meanwhile, conventional circular die-cutting cannot stably form complex irregularly shaped edges such as micro-serrations, wavy edges, micro-text serrations, and tear-resistant teeth at breakpoints, easily resulting in burrs, missing teeth, dimensional fluctuations, and bonding misalignment, failing to meet the requirements of high-speed cigarette pack production lines.

[0003] To address the aforementioned problems, a new type of die holder has emerged. For example, Chinese invention patent CN113211544B discloses a rotary die-cutting die holder, relating to the field of engraving mold technology. It includes a die holder body, a die roller, and mounting covers. The die roller is fixedly installed inside the die holder body, and a roller shaft is fixedly installed inside the die roller. A power motor is fixedly connected to the side of the roller shaft. Mounting covers are fixedly installed on the top of both sides of the die holder body, and fixing bolts are fixedly installed on the top of the mounting covers. A mounting ring is provided on one side of the roller shaft, and mounting grooves are formed on both sides of the die holder body. This invention employs an internal mounting and fixing device with a slider, allowing the threaded rod to move in conjunction with the fixing rod. This causes the fixing rod to drive the fixing clamp for fixation. Then, the friction plate and friction block cooperate to increase the friction of the fixing clamp, thereby improving the fixing performance and solving the problem of poor fixing performance leading to easy detachment of the die roller. This improves the fixing performance of the device and enhances its safety performance. However, the elastic adjustment capability of the aforementioned knife holder mounting ring is insufficient and uncontrollable. Therefore, a special-shaped anti-counterfeiting thread-pulling circular knife die-cutting device is proposed to solve the above problems. Summary of the Invention

[0004] The purpose of this application is to propose a circular die-cutting device for irregular anti-counterfeiting pull-out threads, so as to solve the problem of insufficient and uncontrollable elastic adjustment capability of the blade holder mounting ring.

[0005] To achieve this objective, the following technical solution is adopted in this application: A die-cutting device for irregularly shaped anti-counterfeiting pull-out threads includes a U-shaped die holder body, two die rollers, a mounting cover, a motor, and a roller. The die rollers are rotatably connected to the die holder body. The motor is mounted on the die holder body, and the output shaft of the motor is coaxially connected to the roller. The end of the roller away from the motor is coaxially fixedly connected to one of the die rollers. Mounting covers are detachably provided at both ends of the die holder body. Mounting grooves are provided on both sides of the die holder body. The device also includes a mounting ring and multiple elastic clamping units. The mounting ring is installed in the mounting groove and sleeved on the roller. The multiple elastic clamping units are located inside the mounting ring.

[0006] As a preferred embodiment of this application, the elastic clamping unit includes a clamping block, two disc springs, and a preload bolt. The inner surface of the mounting ring is radially provided with multiple first grooves, each of which contains a clamping block. The two stacked disc springs are disposed between the clamping block and the first groove. One end of the two stacked disc springs is connected to the bottom wall of the first groove, and the other end is connected to the clamping block. The mounting ring has a threaded through hole. The screw of the preload bolt is screwed into the threaded through hole and passes through the central hole of the two stacked disc springs, finally pressing against the clamping block.

[0007] As a preferred technical solution of this application, the clamping block is provided with a countersunk hole adapted to the screw of the pre-tightening bolt, and the outer surface of the mounting ring is provided with a second groove adapted to the bolt head of the pre-tightening bolt. The bolt head of the pre-tightening bolt moves in the second groove, and the screw of the pre-tightening bolt moves in the countersunk hole.

[0008] As a preferred technical solution of this application, a hydraulic column is fixed in the mounting groove, and a first slider is provided at the top of the hydraulic column, and a cavity is provided in the first slider.

[0009] As a preferred technical solution of this application, it also includes a fixing mechanism, which includes a mounting plate, a bidirectional screw, and two clamping units. The mounting plate is disposed in the cavity. One end of the bidirectional screw is rotatably connected to the mounting plate through a bearing seat. The other end of the bidirectional screw passes through the threaded through hole and is threadedly connected to the threaded through hole. The two clamping units are disposed on the bidirectional screw. When the bidirectional screw rotates, the two clamping units move closer to or further away from each other.

[0010] As a preferred technical solution of this application, the clamping unit includes a driving block, a clamping block, and a second slider. The driving block has a threaded through hole and is threadedly connected to the bidirectional screw through the threaded through hole. The second slider is fixed to the bottom end of the driving block. The mounting plate has a first sliding groove adapted to the second slider and the second slider slides in the first sliding groove. The clamping block is fixed to the top end of the driving block.

[0011] As a preferred technical solution of this application, it also includes a support column, a support plate, and a push plate. The mounting plate has a sliding hole adapted to the support column. One end of the support column passes through the sliding hole and is fixedly connected to the push plate, and the other end of the support column is fixedly connected to the support plate.

[0012] As a preferred technical solution of this application, a connecting hole is provided on one side of the first slider, and the mounting ring is slidably connected to the connecting hole within the connecting hole.

[0013] As a preferred technical solution of this application, it also includes a push block. The first slider has second sliding grooves on both sides, and the first slider slides up and down in the mounting groove through the second sliding grooves. The push block is located on the side of the first slider away from the roller.

[0014] Compared to existing technologies, the beneficial effects of this application are: 1. By setting multiple sets of evenly distributed elastic clamping units in the mounting ring, elastic floating clamping of the roller is achieved. The clamping force can be precisely quantified and adjusted by the pre-tightening bolts, avoiding the problems of roller rotation jamming or insufficient clamping force slippage that are easily caused by traditional rigid clamping. This significantly improves the smoothness and coaxiality of the cutter roller rotation.

[0015] 2. The first slider is driven by a hydraulic column to slide up and down along the mounting groove. The installation height of the mounting ring can be flexibly adjusted according to the diameter of different specifications of cutter rollers and shafts and the requirements of die-cutting process, which greatly expands the applicability of the equipment and improves its versatility.

[0016] 3. The auxiliary loading and unloading mechanism, consisting of a support column, a support plate, and a push plate, combined with the sliding connection hole design on the first slider, enables quick plug-in installation and disassembly of the mounting ring without disassembling the tool holder body, significantly shortening the time for tool replacement and maintenance. Attached Figure Description

[0017] The accompanying drawings further illustrate this application, but the content of the drawings does not constitute any limitation on this application.

[0018] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is an exploded view of the slider and mounting ring of this application; Figure 3 This is a schematic diagram of the installation ring structure of this application; Figure 4 yes Figure 3 Enlarged view of region A; Figure 5 This is a schematic diagram of the hydraulic column structure of this application; Figure 6 This is a sectional view of the fixed mechanism in this application.

[0019] In the attached diagram: 1. Tool holder body; 2. Knife roller; 3. Install the cover; 4. Electric motor; 5. Rollers; 6. Mounting slot; 7. Install the ring; 81. Clamping block; 82. Disc spring; 83. Preload bolt; 84. Countersunk hole; 85. Second groove; 9. Hydraulic column; 10. First slider; 111. Mounting plate; 112. Bidirectional screw; 1131. Drive block; 1132. Clamping block; 1133. Second slider; 1134. First slide groove; 121. Support column; 122. Support plate; 123. Push plate; 13. Connecting hole; 141. Push block; 142. Second slide. Detailed Implementation

[0020] The embodiments of this application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as limiting this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, and "several" means one or more, unless otherwise expressly and specifically defined.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0024] Example 1: Figure 1-3 This application provides a die-cutting device for irregular anti-counterfeiting pull-out threads using a circular knife, comprising a U-shaped knife holder body 1, two knife rollers 2, a mounting cover 3, a motor 4, and a roller 5. The knife rollers 2 are rotatably connected inside the knife holder body 1. The motor 4 is mounted on the knife holder body 1, and the output shaft of the motor 4 is coaxially connected to the roller 5. The end of the roller 5 away from the motor 4 is coaxially fixedly connected to one of the knife rollers 2. The mounting cover 3 is detachably provided at both ends of the knife holder body 1. Mounting grooves 6 are provided on both sides of the knife holder body 1. The device also includes a mounting ring 7 and multiple elastic clamping units. The mounting ring 7 is installed in the mounting groove 6 and sleeved on the roller 5. Multiple elastic clamping units are located inside the mounting ring 7.

[0025] In this embodiment, the tool holder body 1 adopts an integrally cast U-shaped gray cast iron structure, which has good shock absorption and structural rigidity, and can effectively absorb the vibration generated by the high-speed operation of the equipment. The two cutter rollers 2 are arranged in parallel and horizontally in the U-shaped groove of the tool holder body 1, and both ends are rotatably connected to the tool holder body 1 through high-precision deep groove ball bearings to ensure the coaxiality of the cutter roller rotation. The motor 4 adopts a high-precision servo motor, which is fixed to one side of the outer wall of the tool holder body 1 by bolts. Its output shaft is coaxially connected to the roller 5 through an elastic coupling, which can realize precise control of speed and smooth transmission of torque. The mounting cover 3 is detachably installed on the two top ends of the tool holder body 1 by internal hex bolts, which is used to protect the end bearings of the cutter rollers 2 and limit their axial movement. The mounting groove 6 is a rectangular through groove opened along the height direction of the tool holder body 1, symmetrically arranged on both sides of the tool holder body 1. The inner wall of the groove is precision machined to ensure the sliding fit accuracy. The mounting ring 7 is a circular ring structure. Multiple elastic clamping units are evenly distributed along the inner circumference of the mounting ring 7, preferably four, to ensure that the clamping force on the roller 5 is uniform and symmetrical.

[0026] Example 2: Preferably, as another embodiment of this application, such as Figure 3 and Figure 4 As shown, the elastic clamping unit includes a clamping block 81, two disc springs 82, and a preload bolt 83. The inner surface of the mounting ring 7 has a plurality of first grooves radially formed, and each first groove contains a clamping block 81. The two stacked disc springs 82 are located between the clamping block 81 and the first groove. One end of the two stacked disc springs 82 is connected to the bottom wall of the first groove, and the other end is connected to the clamping block 81. The mounting ring 7 has a threaded through hole. The screw of the preload bolt 83 is screwed into the threaded through hole and passes through the central hole of the two stacked disc springs 82, finally pressing against the clamping block 81.

[0027] In this embodiment, as one implementation method, the clamping surface of the clamping block 81 is an arc surface that perfectly matches the outer circumference of the roller 5, increasing the contact area with the roller 5, improving the clamping effect, and preventing damage to the roller surface; the two disc springs 82 are stacked in an opposing manner, which can provide a large and stable elastic force with a small amount of deformation, while also having good buffering and shock absorption performance; the preload bolt 83 is a 12.9 grade high-strength internal hexagon bolt to ensure structural strength during the adjustment process. By rotating the preload bolt 83, the clamping block 81 can be pushed to move radially, thereby compressing or releasing the disc springs 82, realizing precise adjustment of the clamping force of the roller 5: when the preload bolt 83 is rotated clockwise, the clamping force increases; when the preload bolt 83 is rotated counterclockwise, the clamping force decreases.

[0028] Optionally, such as Figure 4As shown, the clamping block 81 has a countersunk hole 84 that matches the screw of the pre-tightening bolt 83, and the outer surface of the mounting ring 7 has a second groove 85 that matches the bolt head of the pre-tightening bolt 83. The bolt head of the pre-tightening bolt 83 moves in the second groove 85, and the screw of the pre-tightening bolt 83 moves in the countersunk hole 84.

[0029] The depth of the countersunk hole 84 is greater than the maximum extension length of the pre-tightening bolt 83, ensuring that the pre-tightening bolt 83 will not jam the clamping block 81 and ensuring the realization of the elastic clamping function; the depth of the second groove 85 is greater than the thickness of the bolt head of the pre-tightening bolt 83, ensuring that the bolt head of the pre-tightening bolt 83 is completely sunk into the outer surface of the mounting ring 7 and will not interfere with the movement of the first slider 10 or other components.

[0030] Example 3: Preferably, as another embodiment of this application, such as Figure 5 As shown, a hydraulic column 9 is fixed in the mounting groove 6, and a first slider 10 is provided at the top of the hydraulic column 9. The first slider 10 has a cavity inside.

[0031] In this embodiment, as one implementation method, the hydraulic column 9 is a single-acting micro hydraulic cylinder. The cylinder body is fixed to the bottom inner wall of the mounting groove 6 by bolts, and the top of its piston rod is fixedly connected to the bottom of the first slider 10 through a flange. The outer dimensions of the first slider 10 and the inner dimensions of the mounting groove 6 are clearance-fitted to ensure that the first slider 10 can slide smoothly in the vertical direction within the mounting groove 6. By controlling the extension and retraction of the hydraulic column 9, the first slider 10 can be moved up and down, thereby adjusting the installation height of the mounting ring 7 and keeping the axis of the mounting ring 7 precisely coaxial with the axis of the roller 5.

[0032] Optionally, such as Figure 6 As shown, it also includes a fixing mechanism, which includes a mounting plate 111, a bidirectional screw 112, and two clamping units. The mounting plate 111 is located in the cavity. One end of the bidirectional screw 112 is rotatably connected to the mounting plate 111 through a bearing seat, and the other end of the bidirectional screw 112 passes through a threaded through hole and is threadedly connected to the threaded through hole. The two clamping units are located on the bidirectional screw 112. When the bidirectional screw 112 rotates, the two clamping units move closer to or further away from each other.

[0033] Mounting plate 111 is fixed to the bottom inner wall of the cavity of first slider 10 by bolts; both ends of bidirectional screw 112 are respectively machined with trapezoidal external threads with opposite directions and the same pitch, which have good self-locking performance; one end of bidirectional screw 112 is rotatably connected to mounting plate 111 through deep groove ball bearing seat, and the other end extends out of the outer wall of first slider 10 and is machined with an internal hexagonal operating head, which facilitates rotation operation using tools. When bidirectional screw 112 is rotated clockwise, the two clamping units move closer to each other along the axis of bidirectional screw 112, and radially clamp and fix mounting ring 7; when bidirectional screw 112 is rotated counterclockwise, the two clamping units move away from each other, and release the clamping of mounting ring 7.

[0034] More specifically, such as Figure 6 As shown, the clamping unit includes a drive block 1131, a clamping block 1132, and a second slider 1133. The drive block 1131 has a threaded through hole and is threadedly connected to the bidirectional screw 112 through the threaded through hole. The second slider 1133 is fixed to the bottom end of the drive block 1131. The mounting plate 111 has a first slide groove 1134 that is adapted to the second slider 1133. The second slider 1133 slides in the first slide groove 1134. The clamping block 1132 is fixed to the top end of the drive block 1131.

[0035] The clamping block 1132 adopts a composite structure of rubber and steel plate. The inner layer is made of steel plate to provide structural support, and the outer layer is made of rubber. This not only ensures the clamping strength but also increases the friction between the clamping block and the mounting ring 7, while avoiding damage to the surface of the mounting ring 7 during the clamping process. The two clamping blocks 1132 are symmetrically arranged at both ends of the horizontal diameter of the mounting ring 7 to ensure that the clamping force is uniform and symmetrical.

[0036] Optionally, it also includes a support column 121, a support plate 122, and a push plate 123. The mounting plate 111 has a sliding hole adapted to the support column 121. One end of the support column 121 passes through the sliding hole and is fixedly connected to the push plate 123, and the other end of the support column 121 is fixedly connected to the support plate 122.

[0037] The top surface of the support plate 122 is an arc surface that matches the outer circumference of the mounting ring 7, providing stable support for the mounting ring 7 during installation and removal. The push plate 123 is a rectangular plate structure located on the outside of the first slider 10. When the mounting ring 7 needs to be installed, it is placed on the support plate 122, and the push plate 123 is pushed inward. This allows the support plate 122 and the mounting ring 7 to slide inward along the connecting hole 13 via the support column 121, so that the mounting ring 7 is fitted onto the roller 5. When the mounting ring 7 needs to be removed, the push plate 123 is pulled outward, allowing the mounting ring 7 to be smoothly pulled out of the roller 5.

[0038] Example 4: Preferably, as another embodiment of this application, such as Figure 2As shown, a connecting hole 13 is provided on one side of the first slider 10, and the mounting ring 7 is inside the connecting hole 13 and slidably connected to the connecting hole 13.

[0039] In this embodiment, as one implementation method, the connecting hole 13 is a circular through hole; the axis of the connecting hole 13 is strictly coaxial with the axis of the roller 5, ensuring that the mounting ring 7 can maintain good coaxiality after being sleeved on the roller 5.

[0040] Optionally, it also includes a push block 141. The first slider 10 has second slide grooves 142 on both sides. The first slider 10 slides up and down in the mounting groove 6 through the second slide grooves 142. The push block 141 is located on the side of the first slider 10 away from the roller 5.

[0041] The second groove 142 is a through groove opened along the height direction of the first slider 10, which is adapted to the guide protrusions on both sides of the mounting groove 6. It guides and prevents the first slider 10 from tilting during the up and down sliding. The push block 141 is fixed to the middle of the outer wall of the first slider 10 by bolts. After the hydraulic column 9 adjusts the first slider 10 to the approximate height, it can be precisely finely adjusted at the millimeter level by the push block 141 to further improve the coaxiality of the mounting ring 7 and the roller 5.

[0042] How this application works: I. Equipment Installation and Commissioning Phase 1. Basic component installation: Install two cutter rollers 2 in parallel in the U-shaped groove of the cutter holder body 1. Both ends are rotatably connected to the cutter holder body 1 through high-precision bearings. Install the end mounting covers 3 for protection and limiting. Fix the servo motor 4 on the side wall of the cutter holder body 1. Connect the motor output shaft to one end of the roller 5 through a flexible coupling.

[0043] 2. Pre-installation of the mounting ring: Place the mounting ring 7 on the support plate 122 and push the push plate 123 inward to make the mounting ring 7 slide inward along the connecting hole 13 of the first slider 10 until the mounting ring 7 is completely fitted onto the other end of the roller 5. At this time, the end of the roller 5 is coaxially aligned with the corresponding cutter roller 2 and fixedly connected by a flat key.

[0044] 3. Height Adjustment: Activate the hydraulic control system to drive the hydraulic column 9 to extend and retract, causing the first slider 10 to slide up and down along the mounting groove 6. Adjust the height of the mounting ring 7 so that the axis of the mounting ring 7 is completely coaxial with the axis of the roller 5. After adjustment, turn off the hydraulic system and use the self-locking performance of the hydraulic column to keep the position of the first slider 10 fixed. If necessary, manual fine adjustment can be made by pushing the block 141.

[0045] 4. Clamping force adjustment: Use an Allen wrench to rotate the four pre-tightening bolts 83 on the mounting ring 7 in sequence. The pre-tightening bolts 83 push the clamping block 81 to move radially inward, compressing the disc spring 82, so that the arc clamping surface of the clamping block 81 is evenly and tightly attached to the outer surface of the roller 5. Control the tightening torque of each pre-tightening bolt 83 with a torque wrench to ensure that the clamping force of the four elastic clamping units is consistent, and ensure that the roller 5 rotates smoothly without axial movement or radial runout.

[0046] 5. Mounting ring fixing: Use an Allen wrench to rotate the double-ended screw 112 to drive the two clamping units to move closer to each other along the first slide groove 1134, so that the two clamping blocks 1132 clamp the outer circumference of the mounting ring 7, and firmly fix the mounting ring 7 in the connecting hole 13 of the first slider 10, thus completing the installation and debugging of the equipment.

[0047] II. Die-cutting production stage The servo motor 4 is started, and the motor drives the active cutter roller 2 to rotate via the roller 5. The active cutter roller drives the driven cutter roller to rotate synchronously in the opposite direction via gear transmission. The packaging film roll to be die-cut is fed into the die-cutting gap between the two cutter rollers at a uniform speed through the feeding mechanism. The irregular die-cutting blades on the surface of the cutter rollers continuously roll and cut the packaging film to produce anti-counterfeiting pull lines with complex irregular edges such as micro-serrations, wavy edges, micro-text serrations, and tear-off teeth. During the die-cutting process, the disc spring 82 in the elastic clamping unit can effectively absorb the small vibrations and impacts generated during the rotation of the roller 5, ensuring the smooth rotation of the cutter rollers, thereby ensuring the consistency of the die-cutting dimensions and the forming quality of the irregular edges, and avoiding defects such as burrs, missing teeth, and dimensional fluctuations.

[0048] In the description of this specification, the references to terms such as "embodiment," "one implementation," "some implementations," "illustrative implementation," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the described implementation or example is included in at least one implementation or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same implementation or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more implementations or examples.

[0049] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on the explanation herein, those skilled in the art can conceive of other specific embodiments of this application without creative effort, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A die-cutting device for irregular anti-counterfeiting pull-out threads, comprising a U-shaped die holder body (1), two die rollers (2), a mounting cover (3), a motor (4), and a roller (5), wherein the die rollers (2) are rotatably connected inside the die holder body (1), the motor (4) is mounted on the die holder body (1), the output shaft of the motor (4) is coaxially connected to the roller (5), and one end of the roller (5) away from the motor (4) is coaxially fixedly connected to one of the die rollers (2), the two top ends of the die holder body (1) are detachably provided with mounting covers (3), and mounting grooves (6) are provided on both sides of the die holder body (1), characterized in that, It also includes a mounting ring (7) and multiple elastic clamping units. The mounting ring (7) is installed in the mounting groove (6) and is sleeved on the roller (5). The multiple elastic clamping units are located in the mounting ring (7).

2. The irregular anti-counterfeiting pull-out thread circular die-cutting equipment according to claim 1, characterized in that, The elastic clamping unit includes a clamping block (81), two disc springs (82), and a preload bolt (83). The inner surface of the mounting ring (7) is radially provided with multiple first grooves, and each first groove is provided with a clamping block (81). The two stacked disc springs (82) are located between the clamping block (81) and the first groove. One end of the two stacked disc springs (82) is connected to the bottom wall of the first groove, and the other end is connected to the clamping block (81). The mounting ring (7) is provided with a threaded through hole. The screw of the preload bolt (83) is screwed into the threaded through hole and passes through the center hole of the two stacked disc springs (82) and finally abuts against the clamping block (81).

3. The irregular anti-counterfeiting pull-out thread circular die-cutting equipment according to claim 2, characterized in that, The clamping block (81) has a countersunk hole (84) adapted to the screw of the pre-tightening bolt (83), and the outer surface of the mounting ring (7) has a second groove (85) adapted to the head of the pre-tightening bolt (83). The head of the pre-tightening bolt (83) moves in the second groove (85), and the screw of the pre-tightening bolt (83) moves in the countersunk hole (84).

4. The irregular anti-counterfeiting pull-out thread circular die-cutting equipment according to claim 1, characterized in that, A hydraulic column (9) is fixed in the mounting groove (6), and a first slider (10) is provided at the top of the hydraulic column (9), and a cavity is provided in the first slider (10).

5. The irregular anti-counterfeiting pull-out thread circular die-cutting equipment according to claim 4, characterized in that, It also includes a fixing mechanism, which includes a mounting plate (111), a bidirectional screw (112), and two clamping units. The mounting plate (111) is located in the cavity. One end of the bidirectional screw (112) is rotatably connected to the mounting plate (111) through a bearing seat. The other end of the bidirectional screw (112) passes through the threaded through hole and is threadedly connected to the threaded through hole. The two clamping units are located on the bidirectional screw (112). When the bidirectional screw (112) rotates, the two clamping units move closer to or further away from each other.

6. The irregular anti-counterfeiting pull-out thread circular die-cutting equipment according to claim 5, characterized in that, The clamping unit includes a drive block (1131), a clamping block (1132), and a second slider (1133). The drive block (1131) has a threaded through hole and is threadedly connected to the bidirectional screw (112) through the threaded through hole. The second slider (1133) is fixed at the bottom end of the drive block (1131). The mounting plate (111) has a first slide groove (1134) that is adapted to the second slider (1133). The second slider (1133) slides in the first slide groove (1134). The clamping block (1132) is fixed at the top end of the drive block (1131).

7. The irregular anti-counterfeiting pull-out thread circular die-cutting equipment according to claim 5, characterized in that, It also includes a support column (121), a support plate (122), and a push plate (123). The mounting plate (111) has a sliding hole adapted to the support column (121). One end of the support column (121) passes through the sliding hole and is fixedly connected to the push plate (123). The other end of the support column (121) is fixedly connected to the support plate (122).

8. The irregular anti-counterfeiting pull-out thread circular die-cutting equipment according to claim 4, characterized in that, A connecting hole (13) is provided on one side of the first slider (10), and the mounting ring (7) is slidably connected in the connecting hole (13).

9. A circular die-cutting device for irregularly shaped anti-counterfeiting pull-out threads according to claim 8, characterized in that, It also includes a push block (141), and a second slide groove (142) is provided on both sides of the first slider (10). The first slider (10) slides up and down in the mounting groove (6) through the second slide groove (142). The push block (141) is located on the side of the first slider (10) away from the roller (5).

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