Corrugated box die-cutting synchronization mechanism

Abstract

This utility model discloses a synchronous die-cutting mechanism for corrugated cardboard boxes, belonging to the field of corrugated cardboard box processing. It includes a base with a feeding section, which includes a placement platform for placing corrugated cardboard boxes. The base has an mounting groove. A die-cutting assembly includes a pressing part fixed to the base, which includes a pressing plate driven by a power source. The bottom surface of the pressing plate has mounting parts adapted to different cardboard box sizes. A thickness measuring assembly includes a second cylinder fixed to one end of the inner wall of the mounting groove. The telescopic end of the second cylinder is connected to a thickness measuring part for measuring the thickness of the corrugated cardboard box. This synchronous die-cutting mechanism for corrugated cardboard boxes solves the problem of traditional equipment's difficulty in adjusting die-cutting pressure according to cardboard box thickness through the feeding section, die-cutting assembly, and thickness measuring assembly. The thickness measuring assembly accurately measures the thickness, and the die-cutting assembly adjusts the pressure accordingly, avoiding incomplete cutting of thick boxes and damage to thin boxes, ensuring quality, and improving adaptability and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of corrugated cardboard box processing technology, and in particular to a synchronous die-cutting mechanism for corrugated cardboard boxes. Background Technology

[0002] Die-cutting of corrugated cardboard boxes is a crucial step in the production process. Its core is to use specific molds (dies) to cut and creasing the corrugated cardboard, forming it into the shape and creases required by the design, thus laying the foundation for subsequent folding and shaping into cardboard boxes.

[0003] For example, an adjustable corrugated carton die-cutting equipment with publication number CN218928741 U includes a base, support column, top plate, lifting device, pushing device, positioning mechanism, worktable, connecting plate, multiple sets of U-shaped grooves and upper mold. It realizes the sliding disassembly and replacement of the upper mold. That is, by separating and cooperating multiple sets of T-shaped sliders and multiple sets of U-shaped grooves, the efficiency of changing and adjusting upper molds of different specifications is greatly improved, which provides convenience for adapting to the processing needs of cartons of different sizes.

[0004] In actual die-cutting operations, the above-mentioned scheme works by extending the moving end of the first cylinder downwards, causing the support plate to move down synchronously. The support plate transmits the force to the support block through the compression spring, which in turn pushes the connecting plate and the upper mold to move down synchronously. As the upper mold gradually approaches the carton on the worktable, its die-cutting edge contacts the surface of the carton and applies pressure. Finally, the die-cutting process is completed by the cooperation of the upper mold and the worktable.

[0005] However, this solution reveals significant limitations when processing corrugated boxes of varying thicknesses. Since the pressure output of the pushing device relies primarily on the fixed stroke of the cylinder and the elastic potential energy of the spring, it's difficult to dynamically adjust the die-cutting pressure according to the box thickness. For thicker boxes, insufficient pressure may result in incomplete cutting or blurred indentations; for thinner boxes, excessive pressure may damage the cardboard or wear the mold, severely impacting die-cutting quality and equipment lifespan. Therefore, a synchronous die-cutting mechanism for corrugated boxes needs to be designed.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0007] This utility model embodiment provides a synchronous die-cutting mechanism for corrugated cartons to solve the problem that the above-mentioned solutions, when processing cartons of different thicknesses, make it difficult to dynamically adjust the die-cutting pressure due to the fixed pressure output of the pushing device, which easily leads to incomplete cutting of thick cartons and damage to thin cartons.

[0008] This utility model embodiment adopts the following technical solution: a corrugated cardboard box die-cutting synchronous mechanism. It mainly includes a base, on which a feeding part is provided. The feeding part includes a placement platform for placing corrugated cardboard boxes, and the base has an installation groove; a die-cutting assembly, which is disposed on the base, the die-cutting assembly including a pressing part fixed on the base, the pressing part including a pressing plate driven by power, the bottom surface of the pressing plate having an installation part adapted to cardboard boxes of different specifications; and a thickness measuring assembly, which is disposed in the installation groove, the thickness measuring assembly including a second cylinder fixed to one end of the inner wall of the installation groove, the telescopic end of the second cylinder being connected to a thickness measuring part for measuring the thickness of the corrugated cardboard box.

[0009] Furthermore, the base is equipped with a PLC control system, and pressure sensors are embedded at the partial contact points between the die-cutting part and the corrugated cardboard box, and at the partial contact points between the receiving part and the corrugated cardboard box.

[0010] Furthermore, the thickness measuring part includes a concave frame fixed to the telescopic end of the second cylinder. The concave frame is connected to the inner wall of the mounting groove through a guide rail slider structure. A lead screw is mounted on the concave frame via a bearing. One end of the lead screw is connected to a forward and reverse motor. The output end of the forward and reverse motor is connected to the lead screw via a coupling. A slide block is threaded onto the lead screw. Two sets of parallel vertical rods are fixed on the concave frame. The slide block is movably mounted on the vertical rods. A receiving part is fixed on the side of the slide block for receiving the thickness measuring signal.

[0011] Furthermore, a second slide block is fixedly sleeved near one end of each of the two sets of vertical rods. The second slide block has a through hole with a diameter larger than that of the lead screw, allowing the lead screw to pass freely through the second slide block without interference.

[0012] Furthermore, a laser rangefinder sensor is mounted on the side of the slide block two. The laser head of the laser rangefinder sensor is flush with the bottom surface of the placement platform. A through hole is specially opened on the placement platform, and the laser emitted by the laser rangefinder sensor passes through the through hole and irradiates the bottom surface of the receiving part.

[0013] Furthermore, the pressing part includes a top plate supported and fixed on the base by four sets of columns. Two sets of first cylinders are installed on the top plate. The telescopic ends of the first cylinders point downward and penetrate the top plate. The pressing plate is fixed to the telescopic ends of the first cylinders.

[0014] Furthermore, the mounting part includes multiple sets of guide rods arranged at equal intervals. The guide rods are fixed to the bottom surface of the pressure plate, and a die-cutting part is slidably connected to the guide rods via a sliding sleeve. The die-cutting part passes through the sliding sleeve with bolts and presses against the guide rods.

[0015] Furthermore, the feeding unit includes two sets of slide rails fixed on the base and parallel to each other. The placement platform is slidably mounted on the two sets of slide rails by a slider. On the base, at one end of the two sets of slide rails near the die-cutting station, a concave baffle is arranged around three sides of the placement platform.

[0016] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects:

[0017] The corrugated carton die-cutting synchronization mechanism, by incorporating a feeding section, die-cutting assembly, and thickness measuring assembly, effectively solves the problem of traditional equipment struggling to dynamically adjust die-cutting pressure based on carton thickness. The thickness measuring assembly, driven by a second cylinder, accurately measures the thickness of the corrugated carton placed on the platform, providing data support for pressure adjustment. The die-cutting assembly's pressing section, powered by a pressure plate and adapted to different carton sizes, dynamically adjusts the die-cutting pressure based on the thickness measurement results. For thicker cartons, it avoids incomplete cutting or blurred indentations due to insufficient pressure; for thinner cartons, it prevents cardboard damage or mold wear caused by excessive pressure, thus ensuring stable die-cutting quality and improving the equipment's adaptability to corrugated cartons of varying thicknesses, thereby increasing production efficiency. Attached Figure Description

[0018] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0019] In the attached diagram:

[0020] Figure 1 This is a schematic diagram of the overall process of the corrugated cardboard box die-cutting synchronization mechanism in this application;

[0021] Figure 2 for Figure 1 A partial schematic diagram;

[0022] Figure 3 This is a magnified view of point A in section 2;

[0023] Figure 4 for Figure 2 The front view;

[0024] Figure 5 Enlarged view of point B at position 4;

[0025] Figure label:

[0026] 1. Support assembly; 11. Base; 111. Mounting slot; 12. Top frame; 13. Slide rail; 14. Placement platform; 141. Through hole; 2. Die-cutting assembly; 21. Column; 22. Top plate; 23. First cylinder; 24. Guide rod; 25. Pressure plate; 26. Guide rod; 27. Die-cutting part; 28. Sliding sleeve; 29. ​​Bolt; 3. Thickness measuring assembly; 31. Second cylinder; 32. Concave frame; 33. Lead screw; 34. Slide seat one; 35. Receiving part; 36. Slide seat two; 37. Laser rangefinder sensor; 38. Vertical rod. Detailed Implementation

[0027] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0028] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0029] Reference Figures 1-5 As shown, the corrugated cardboard box die-cutting synchronous mechanism provided in this embodiment of the present invention includes a support component 1, which includes a base 11. A top frame 12 is fixedly installed on the top of the base 11 through a connector. A feeding part is provided on the upper surface of the base 11. The feeding part includes two sets of slide rails 13 fixed on the base 11 and parallel to each other. A placement platform 14 is slidably arranged on the two sets of slide rails 13 through a slider. With the sliding cooperation between the slider and the slide rail 13, the placement platform 14 can move back and forth smoothly above the base 11. The table surface of the placement platform 14 is used to stably place the corrugated cardboard box to be die-cut.

[0030] Meanwhile, to prevent the placement table 14 from shifting out of position due to inertia or external force during the feeding process, concave baffles are provided on the base 11 at one end of the two sets of slide rails 13 near the die-cutting station, along the three sides of the placement table 14. When the placement table 14 moves the carton to the die-cutting area, the concave baffles can restrict its movement from three directions, ensuring that the placement table 14 is accurately aligned with the upper die-cutting mechanism during die-cutting. This ensures that the corrugated carton can stably cooperate with the upper mold and other components during subsequent die-cutting operations, achieving high-quality cutting, creasing and other processing.

[0031] A die-cutting assembly 2 is provided on the base 11, which is used to complete the die-cutting process of corrugated cardboard boxes. The die-cutting assembly 2 includes a pressing part fixed on the base 11. The pressing part includes a top plate 22 supported and fixed on the base 11 by four sets of columns 21, and two sets of first cylinders 23 are fixedly installed on the top plate 22. The telescopic ends of the first cylinders 23 point downward and penetrate through the top plate 22. A pressing plate 25 is fixed to the telescopic ends of the first cylinders 23. The first cylinders 23 can drive the pressing plate 25 to rise and fall vertically. To ensure the stability of the pressing plate 25 when it rises and falls, four sets of symmetrically distributed guide rods 24 are also fixed on the base 11. The guide rods 24 penetrate upward through the top plate 22, and the pressing plate 25 is movably sleeved on the guide rods 24. When the first cylinders 23 extend and retract, the guide rods 24 can guide the movement of the pressing plate 25 from four directions to prevent it from tilting or deviating, so that the die-cutting pressure is applied more evenly to the corrugated cardboard box.

[0032] The bottom surface of the pressure plate 25 integrates a mounting part that flexibly adapts to different sizes of cartons. This mounting part includes multiple sets of equidistantly arranged guide rods 26. The guide rods 26 are firmly fixed to the bottom surface of the pressure plate 25 by screws or other means. A die-cutting part 27 is slidably connected to the guide rods 26 via a sliding sleeve 28. The die-cutting part 27, as the execution component that directly contacts the corrugated carton, slides with the guide rods 26 via the sliding sleeve 28, making it easy to adjust the position of the die-cutting part 27 according to the width of the corrugated carton. After adjustment, the die-cutting part 27 is securely locked in the desired position by passing a bolt 29 through the sliding sleeve 28 and pressing it against the guide rod 26. For corrugated cartons of different widths, there is no need to change the entire set of molds. Simply slide and adjust the position of the die-cutting part 27 on the guide rod 26 and fix it to quickly switch the die-cutting specifications.

[0033] A mounting groove 111 is provided on the base 11, and a thickness measuring component 3 for detecting the thickness of corrugated cardboard boxes is provided in the mounting groove 111. The thickness measuring component 3 includes a second cylinder 31 with one end fixed to the inner wall of the mounting groove 111 and positioned horizontally. The telescopic end of the second cylinder 31 is connected to the thickness measuring part. The thickness measuring part includes a concave frame 32 fixed to the telescopic end of the second cylinder 31. The concave frame 32 is connected to the inner wall of the mounting groove 111 through a guide rail slider structure, which ensures that it can stably telescopic in the horizontal direction under the drive of the second cylinder 31, moving closer to or away from the corrugated cardboard boxes on the placement platform 14. At the same time, a lead screw 33 is mounted on the concave frame 32 through a bearing. One end of the lead screw 33 is connected to a forward and reverse motor (not shown in the figure, but can be understood as the power source that drives the lead screw to rotate). The output end of the forward and reverse motor is reliably connected to the lead screw 33 through a coupling, providing power for the rotation of the lead screw 33, so that the subsequent thickness measuring action is adjustable.

[0034] Meanwhile, a slide block 34 is threaded onto the lead screw 33. Two sets of parallel vertical rods 38 are fixed to the concave frame 32, providing guidance and constraint for the movement of the slide block 34. The slide block 34 is movably fitted onto the vertical rods 38, allowing it to slide smoothly along the vertical rods 38 when the lead screw 33 rotates. A receiving part 35 is fixed to the side of the slide block 34 for receiving thickness measurement signals. A second slide block 36 is also fixedly fitted onto one end of each set of vertical rods 38. The second slide block 36 has a through hole (not shown in the figure) with a diameter larger than that of the lead screw 33, allowing the lead screw 33 to pass freely through the second slide block 36 without interference, ensuring the independent sliding of the slide block 34.

[0035] A laser rangefinder 37 is mounted on the side of the slide 36. The laser head of the laser rangefinder 37 is flush with the bottom surface of the placement platform 14. In order to allow the laser beam to reach the carton on the placement platform 14 smoothly, a through hole 141 is specially opened on the placement platform 14. The laser emitted by the laser rangefinder 37 can pass through the through hole 141 and irradiate the bottom surface of the receiving part 35. At the same time, a notch is also opened on the side of the concave structure cover (not shown in the figure). When the concave frame 32 of the thickness measuring component 3 moves to one end of the inner wall of the mounting groove 111 with the second cylinder 31, the laser rangefinder 37 can pass through the notch, and the laser beam of the laser rangefinder 37 can pass through the through hole 141.

[0036] Furthermore, a PLC control system is installed on the base 11. This PLC control system is used to control the operation of the above-mentioned equipment. Pressure sensors are embedded in the partial contact positions between the die-cutting part 27 and the corrugated carton and the partial contact positions between the receiving part 35 and the corrugated carton. When the operator places the corrugated carton smoothly on the placement table 14 and pushes the placement table 14 to move along the slide rail 13 to the designated die-cutting station (i.e., the placement table 14 contacts the concave cover and triggers the positioning signal), the PLC control system commands the second cylinder 31 to act, driving the thickness measuring part to move towards the placement table 14, so that the concave frame 32 of the thickness measuring part moves to one end of the inner wall of the mounting groove 111 and gradually approaches the carton on the placement table 14.

[0037] When the concave frame 32 moves to its limit position at one end of the inner wall of the mounting groove 111, the PLC starts the forward and reverse motors. The output shaft of the forward and reverse motors drives the lead screw 33 to rotate through the coupling. When the lead screw 33 rotates, the threaded sliding block 34 moves smoothly down along the vertical rod 38, causing the receiving part 35 on the side to gradually approach the upper surface of the corrugated carton until the pressure sensor detects slight contact pressure (to avoid excessive squeezing and damage to the carton). At this time, the laser range sensor 37 emits a laser beam, which is reflected by the upper surface of the carton and captured by the receiving part 35. The PLC control system combines the laser range data with the pre-stored thickness parameters of the placement platform 14, and calculates the thickness of the corrugated carton using the algorithm of total laser range value - thickness of placement platform 14 = actual thickness of the carton.

[0038] Working principle: The operator places the corrugated cardboard box to be die-cut flat on the placement table 14 and pushes the placement table 14 to slide along the two sets of parallel slide rails 13 on the base 11. When the placement table 14 contacts the concave baffles surrounding it on three sides, a positioning signal is triggered, completing the pre-positioning of the die-cutting station. The concave baffles spatially restrict the displacement of the placement table 14, ensuring that the cardboard box is accurately aligned with the die-cutting component 2 and the thickness measuring component 3 above during subsequent die-cutting. During this process, the cooperation between the slide rails 13 and the slider ensures smooth movement of the placement table 14, and the PLC control system monitors the positioning signal in real time to prepare for subsequent actions.

[0039] After the placement platform 14 is in place, the PLC control system initiates the thickness measurement process. First, it instructs the second cylinder 31 to move, causing the concave frame 32 of the thickness measuring part to move to the extreme position of the mounting groove 111 near the placement platform 14. Subsequently, the forward and reverse motors start, driving the lead screw 33 to rotate through the coupling, causing the slide 34 to move down along the vertical rod 38 until the receiving part 35 lightly touches the upper surface of the carton (the pressure sensor reports slight contact pressure). At this time, the laser range sensor 37 emits a laser, which is reflected by the upper surface of the carton and captured by the receiving part 35. The PLC calls up the laser range data, combines it with the pre-stored thickness parameters of the placement platform 14, and calculates the thickness of the corrugated carton using the algorithm of total laser range value - thickness of placement platform 14 = actual thickness of the carton. The data is then transmitted to the die-cutting control module.

[0040] Based on the thickness of the cardboard box obtained from thickness measurement, the PLC control system calls the preset thickness and pressure matching model to dynamically adjust the pressure output of the die-cutting component 2. If the cardboard box is too thick, the first cylinder 23 is controlled to slow down the downward pressure, allowing the contact pressure between the die-cutting part 27 and the cardboard box to rise slowly, ensuring thorough cutting and clear indentations. If the cardboard box is too thin, the pressure increase is reduced to avoid crushing the cardboard. During the die-cutting process, the die-cutting part 27, through the cooperation of the guide rod 26 and the sliding sleeve 28, can be adjusted to accommodate cardboard boxes of different widths. The pressure sensor provides real-time feedback on the contact pressure, forming a closed-loop control. Finally, the die-cutting process of the corrugated cardboard box is completed. After processing, the first cylinder 23 drives the die-cutting part 27 to reset, and the operator removes the finished product, completing one die-cutting cycle. This achieves synchronization between adjusting the die-cutting pressure according to the cardboard thickness, effectively improving the die-cutting quality and the equipment's compatibility with different cardboard specifications.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A die-cutting synchronization mechanism for a corrugated box, characterized by: include The base (11) is provided with a feeding part, which includes a placement platform (14) for placing corrugated cardboard boxes. The base (11) is provided with an installation groove (111). Die-cutting assembly (2) is disposed on the base (11). The die-cutting assembly (2) includes a pressing part fixed on the base (11). The pressing part includes a pressing plate (25) driven by power. The bottom surface of the pressing plate (25) is provided with an installation part adapted to different specifications of cartons. Thickness measuring component (3) is disposed in the mounting groove (111). The thickness measuring component (3) includes a second cylinder (31) fixed at one end of the inner wall of the mounting groove (111). The telescopic end of the second cylinder (31) is connected to a thickness measuring part for measuring the thickness of corrugated cardboard boxes.

2. The corrugated cardboard box die-cutting synchronous mechanism according to claim 1, characterized in that: The base (11) is equipped with a PLC control system, and pressure sensors are embedded in the partial contact positions between the die-cutting part (27) and the corrugated carton, and between the receiving part (35) and the corrugated carton.

3. The corrugated cardboard box die-cutting synchronous mechanism according to claim 2, characterized in that: The thickness measuring part includes a concave frame (32) fixed to the telescopic end of the second cylinder (31). The concave frame (32) is connected to the inner wall of the mounting groove (111) through a guide rail slider structure. A lead screw (33) is mounted on the concave frame (32) through a bearing. One end of the lead screw (33) is connected to a forward and reverse motor. The output end of the forward and reverse motor is connected to the lead screw (33) through a coupling. A slide block (34) is threaded onto the lead screw (33). Two sets of parallel vertical rods (38) are fixed on the concave frame (32). The slide block (34) is movably sleeved on the vertical rods (38). A receiving part (35) is fixed on the side of the slide block (34) for receiving the thickness measuring signal.

4. The corrugated cardboard box die-cutting synchronous mechanism according to claim 3, characterized in that: Two sets of vertical rods (38) are also fixedly sleeved with slide block two (36) near one end. The slide block two (36) has a through hole with a diameter larger than that of the lead screw (33). The lead screw (33) can pass freely through the slide block two (36) without interference.

5. The corrugated cardboard box die-cutting synchronous mechanism according to claim 4, characterized in that: A laser rangefinder (37) is mounted on the side of the slide block (36). The laser head of the laser rangefinder (37) is flush with the bottom surface of the placement platform (14). A through hole (141) is specially opened on the placement platform (14). The laser emitted by the laser rangefinder (37) passes through the through hole (141) and irradiates the bottom surface of the receiving part (35).

6. The corrugated cardboard box die-cutting synchronous mechanism according to claim 5, characterized in that: The pressing part includes a top plate (22) supported and fixed on the base (11) by four sets of columns (21). Two sets of first cylinders (23) are installed on the top plate (22). The telescopic ends of the first cylinders (23) are downward and penetrate the top plate (22). The pressing plate (25) is fixed to the telescopic ends of the first cylinders (23).

7. The corrugated cardboard box die-cutting synchronous mechanism according to claim 6, characterized in that: The mounting part includes multiple sets of guide rods (26) arranged at equal intervals. The guide rods (26) are fixed to the bottom surface of the pressure plate (25). A die-cutting part (27) is slidably connected to the guide rods (26) through a sliding sleeve (28). The die-cutting part (27) passes through the sliding sleeve (28) and presses against the guide rods (26) through a bolt (29).

8. The corrugated cardboard box die-cutting synchronous mechanism according to claim 1, characterized in that: The feeding part includes two sets of slide rails (13) fixed on the base (11) and parallel to each other. The placement table (14) is slidably mounted on the two sets of slide rails (13) by a slider. On the base (11), at one end of the two sets of slide rails (13) near the die-cutting station, a concave baffle is provided around the three sides of the placement table (14).

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