Pressure device for cold foil stamping of packaging boxes

Abstract

This utility model relates to the technical field of printing equipment, and in particular to a pressure device for cold foil stamping of packaging boxes. It employs two clutch plate mechanisms to scrape the film left and right, achieving a smooth finish and improving work efficiency. The device includes two frames, two lifting platforms, two push cylinders, a first pressure roller, and a second pressure roller. The fixed ends of the two push cylinders are respectively mounted on the two frames, and the piston rods of the two push cylinders are respectively connected to the two lifting platforms. The two ends of the first and second pressure rollers are rotatably connected to the two lifting platforms. The device also includes two mounting brackets, an optical shaft, a reciprocating lead screw, and two separating plate mechanisms. One end of each mounting bracket is connected to the two lifting platforms, and the other end of each mounting bracket extends beyond the outer side of the second pressure roller. The two ends of the optical shaft and the reciprocating lead screw are respectively connected to the two mounting brackets. The two separating plate mechanisms are respectively mounted opposite each other on the optical shaft and the reciprocating lead screw, and are driven by the reciprocating lead screw to move relative to each other along the optical shaft.

Description

Technical Field

[0001] This utility model relates to the technical field of printing equipment, and in particular to a pressure device for cold foil stamping of packaging boxes. Background Technology

[0002] Cold foil stamping is a printing process that uses special adhesive (ink) to adhere the foil (excluding the base layer) to the surface of the substrate, thus achieving the foil stamping effect.

[0003] Chinese utility model patent CN217170140U discloses a pressure device for cold foil stamping of packaging boxes. This device includes two opposing supports, with cylinders fixed to the top of each support. A first pressure roller, a second pressure roller, and a scraper are sequentially arranged between the two supports. The first and second pressure rollers are rotatably mounted between the two supports, while the scraper is fixedly mounted between the two supports. Lifting plates are fixedly mounted on the scraper at fixed intervals. A pressure assembly is located inside the first pressure roller, including a fixed shaft mounted inside the first pressure roller and fixed along the same axis. First bearings are mounted on the ring wall of the fixed shaft on both sides, with the inner ring wall of the first bearings fixed to the fixed shaft. Large ring gears are fixed on the ring wall of the fixed shaft on both sides of the two first bearings. This device enables the film to shrink upon heating, adhering tightly to the printed material and reducing the probability of air bubbles.

[0004] After the heat shrinking of the film, the above-mentioned pressure device applies pressure again to the pressed film by using the contact end of the lifting plate and the second pressure roller to apply a certain tension and flatten the film in advance. However, the lifting plate of the above-mentioned pressure device is fixedly arranged and cannot flatten the film completely, which is not conducive to subsequent processing. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a pressure device for cold foil stamping of packaging boxes, which uses two clutch plate mechanisms to move the film left and right to scrape and smooth the film, thereby improving work efficiency.

[0006] This utility model discloses a pressure device for cold foil stamping printing on packaging boxes, comprising two frames, two lifting platforms, two push cylinders, a first pressure roller, and a second pressure roller. The two frames are arranged opposite to each other. The two lifting platforms are slidably mounted on the two frames, and the fixed ends of the two push cylinders are respectively mounted on the two frames. The piston rods of the two push cylinders are respectively connected to the two lifting platforms. The two ends of the first and second pressure rollers are rotatably connected to the two lifting platforms via rotating shafts. The device also includes two mounting brackets, a guide shaft, a reciprocating lead screw, and two separating plate mechanisms. One end of each mounting bracket is connected to the two lifting platforms, and the other end of each mounting bracket extends beyond the outer side of the second pressure roller. The two ends of the guide shaft and the reciprocating lead screw are respectively connected to the two mounting brackets. The two separating plate mechanisms... The two separation plate mechanisms are respectively mounted on the optical axis and the reciprocating lead screw. Driven by the reciprocating lead screw, they move relative to each other along the optical axis. During operation, the packaging box is conveyed to the area below the first and second pressure rollers. The piston rods of the two push cylinders extend downwards and push the two lifting platforms down along the two frames, causing the first and second pressure rollers to roll the packaging box, so that the film is cold-pressed onto the packaging box. This drives the reciprocating lead screw to rotate, which in turn drives the two separation plate mechanisms to slide back and forth synchronously relative to each other along the left and right sides of the optical axis. This allows the two separation plate mechanisms to scrape the film left and right, applying a certain tension to the film and smoothing it out completely, reducing wrinkles and facilitating subsequent processing, thus improving work efficiency.

[0007] Preferably, the clutch plate mechanism includes an upper scraper, a lower scraper, a hinge shaft, and a flipping assembly. The upper scraper is slidably connected to the optical axis and is also connected to a reciprocating screw drive. The upper end of the lower scraper is rotatably connected to the lower end of the upper scraper via the hinge shaft. The flipping assembly is mounted on the upper scraper and is used to adjust the tilt angle of the lower scraper. The flipping assembly adjusts the angle of the lower scraper so that the lower end of the lower scraper scrapes the film, driving the upper scraper to move outward from the optical axis, thus smoothing the film. The flipping assembly then adjusts the angle of the lower scraper so that the lower end of the lower scraper disengages from the film, driving the upper scraper to move towards the center of the optical axis, thus resetting the lower scraper to the center of the film. This process is repeated to ensure that the lower scraper fully and completely smooths the film.

[0008] Preferably, the flipping assembly includes a first gear, a stepper motor, and a second gear. The first gear is concentrically mounted on the hinge shaft, the stepper motor is mounted on the upper scraper, and the second gear is concentrically mounted on the output shaft of the stepper motor. The second gear meshes with the first gear. The stepper motor drives the second gear to rotate, and the second gear meshes with the first gear to drive the hinge shaft and the lower scraper to rotate, thereby adjusting the angle of the lower scraper.

[0009] Preferably, it also includes a first transmission wheel, a second transmission wheel, and a transmission belt. The first transmission wheel is concentrically mounted on the reciprocating screw, the second transmission wheel is concentrically mounted on the shaft of the second pressure roller, and the transmission belt is fitted onto the first transmission wheel and the second transmission wheel. When the second pressure roller rotates, it drives the second transmission wheel to rotate through the shaft. The second transmission wheel drives the first transmission wheel and the reciprocating screw to rotate through the transmission belt, thereby driving the reciprocating screw.

[0010] Preferably, the device further includes two elastic telescopic rods and two pressure sensors. Elastic telescopic rods are installed at the lower part of the piston rods of both push cylinders, and the ends of the two elastic telescopic rods are respectively connected to the two pressure sensors. The two pressure sensors are respectively installed on two lifting platforms. When the piston rods of the two push cylinders extend downwards and push the first and second pressure rollers through the two lifting platforms to roll the film, the two elastic telescopic rods are compressed, and the two pressure sensors are simultaneously subjected to pressure. The two pressure sensors detect the pressure received and adjust the extension and retraction of the piston rods of the two push cylinders according to the detected pressure, thereby improving the pressure application accuracy.

[0011] Preferably, it also includes a grating head and a grating ruler. The grating head is installed on the end of the lifting platform, and the grating ruler is installed on the frame. The grating head and the grating ruler are aligned. The grating head and the grating ruler work together to measure the displacement of the end of the lifting platform. Corresponding grating heads and grating rulers are set on the end of the two lifting platforms and on the two frames to measure the displacement of the two ends of the two lifting platforms, thereby detecting the synchronization of the first pressure roller and the second pressure roller and whether horizontal pressure is applied to the film coating.

[0012] Preferably, the system also includes two fine-tuning motors and two half-wheels. The two fine-tuning motors are respectively mounted on the ends of the two lifting platforms, and the two half-wheels are respectively mounted on the output shafts of the two fine-tuning motors. The cams of the two half-wheels respectively engage with the two frames. During the lifting process of the two lifting platforms, the protrusions of the half-wheels disengage from the two frames. When the two lifting platforms are lowered to their positions, the two fine-tuning motors drive the two half-wheels to rotate, causing the protrusions of the two half-wheels to rub against the two frames. Through the reaction force, the height of the ends of the two lifting platforms is finely adjusted. When the two half-wheels rotate in the opposite direction, they rub against the two frames, causing the ends of the two lifting platforms to be finely adjusted downwards. When the two half-wheels rotate in the forward direction, they rub against the two frames, causing the ends of the two lifting platforms to be finely adjusted upwards. The amount of fine-tuning is adjusted according to the detection values ​​of the grating head and grating ruler, so that the two ends of the two lifting platforms maintain the same height, thereby improving the pressure accuracy of the first and second pressure rollers.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: During operation, the packaging box is conveyed to the bottom of the first and second pressure rollers. The piston rods of the two push cylinders extend downwards and push the two lifting platforms down along the two frames, so that the first and second pressure rollers roll the packaging box, causing the film to be cold-pressed onto the packaging box. The reciprocating screw is driven to rotate, and the reciprocating screw drives the two clutch plate mechanisms to slide back and forth synchronously along the left and right sides of the optical axis, so that the two clutch plate mechanisms scrape the film left and right, giving the film a certain tension, and smoothing the film completely, reducing the wrinkles of the film, which is beneficial to subsequent processing and improves work efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the rear-view axonometric structure of this utility model;

[0016] Figure 3 This is a side view of the structure of this utility model;

[0017] Figure 4 It is a structural diagram of the lifting platform, push cylinder, first pressure roller, second pressure roller, elastic telescopic rod, pressure sensor, grating head, fine-tuning motor and half wheel, etc.

[0018] Figure 5 It is a structural diagram of the mounting bracket, optical axis, reciprocating lead screw, and clutch plate mechanism, etc.

[0019] Figure 6 It is a structural diagram of the upper scraper, lower scraper, hinge shaft, gear one, stepper motor and gear two.

[0020] The following components are labeled in the attached diagram: 1. Frame; 2. Lifting platform; 3. Push cylinder; 4. First pressure roller; 5. Second pressure roller; 6. Mounting frame; 7. Optical shaft; 8. Reciprocating lead screw; 9. Upper scraper; 10. Lower scraper; 11. Hinge shaft; 12. Gear one; 13. Stepper motor; 14. Gear two; 15. Transmission wheel one; 16. Transmission wheel two; 17. Transmission belt; 18. Elastic telescopic rod; 19. Pressure sensor; 20. Grating head; 21. Grating ruler; 22. Fine-tuning motor; 23. Half wheel. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example 1

[0022] like Figures 1 to 6 As shown, the pressure device for cold foil stamping of packaging boxes includes two frames 1, two lifting platforms 2, two push cylinders 3, a first pressure roller 4, and a second pressure roller 5. The two frames 1 are arranged opposite each other. The two lifting platforms 2 are slidably mounted on the two frames 1, and the fixed ends of the two push cylinders 3 are respectively mounted on the two frames 1. The piston rods of the two push cylinders 3 are respectively connected to the two lifting platforms 2. The two ends of the first pressure roller 4 and the second pressure roller 5 are rotatably connected to the two lifting platforms 2 through rotating shafts. It also includes two mounting brackets 6, an optical shaft 7, a reciprocating lead screw 8, and two separation plate mechanisms. One end of the two mounting brackets 6 It is connected to two lifting platforms 2 respectively. The other ends of the two mounting brackets 6 extend out of the outer side of the second pressure roller 5. The two ends of the optical shaft 7 and the reciprocating screw 8 are connected to the two mounting brackets 6 respectively. The two separation plate mechanisms are respectively mounted on the optical shaft 7 and the reciprocating screw 8. The two separation plate mechanisms are driven by the reciprocating screw 8 to move relative to each other along the optical shaft 7. It also includes a transmission wheel 15, a transmission wheel 2 16 and a transmission belt 17. The transmission wheel 15 is concentrically mounted on the reciprocating screw 8. The transmission wheel 2 16 is concentrically mounted on the rotating shaft of the second pressure roller 5. The transmission belt 17 is fitted on the transmission wheel 15 and the transmission wheel 2 16.

[0023] During operation, the packaging box is conveyed to the area below the first pressure roller 4 and the second pressure roller 5. The piston rods of the two push cylinders 3 extend downwards and push the two lifting platforms 2 down along the two frames 1, causing the first pressure roller 4 and the second pressure roller 5 to roll the packaging box, so that the film is cold-pressed onto the packaging box. The rotation of the second pressure roller 5 causes the transmission wheel 16 to rotate through the rotating shaft. The transmission wheel 16 drives the transmission wheel 15 and the reciprocating screw 8 to rotate through the transmission belt 17, thereby driving the reciprocating screw 8. The reciprocating screw 8 drives the two clutch plate mechanisms to slide back and forth synchronously along the left and right sides of the optical axis 7, so that the two clutch plate mechanisms scrape the film left and right, giving the film a certain tension, and smoothing the film evenly, reducing wrinkles, which is beneficial for subsequent processing and improving work efficiency.

[0024] The clutch plate mechanism includes an upper scraper 9, a lower scraper 10, a hinge shaft 11, and a flipping assembly. The upper scraper 9 is slidably connected to the optical shaft 7 and is driven by the reciprocating lead screw 8. The upper end of the lower scraper 10 is rotatably connected to the lower end of the upper scraper 9 through the hinge shaft 11. The flipping assembly is installed on the upper scraper 9 and is used to adjust the tilt angle of the lower scraper 10. The flipping assembly includes a first gear 12, a stepper motor 13, and a second gear 14. The first gear 12 is concentrically installed on the hinge shaft 11, the stepper motor 13 is installed on the upper scraper 9, and the second gear 14 is concentrically installed on the output shaft of the stepper motor 13. The second gear 14 meshes with the first gear 12.

[0025] Stepper motor 13 drives gear 14 to rotate. Gear 14 meshes with gear 12 to drive hinge shaft 11 and lower scraper 10 to rotate, thereby adjusting the angle of lower scraper 10 so that the lower end of lower scraper 10 scrapes the film. This drives upper scraper 9 to move outward of optical axis 7, so that lower scraper 10 flattens the film. The flipping assembly adjusts the angle of lower scraper 10 so that the lower end of lower scraper 10 disengages from the film. This drives upper scraper 9 to move towards the middle of optical axis 7, so that lower scraper 10 returns to the middle of film. The above actions are repeated so that lower scraper 10 can fully and completely flatten the film. Example 2

[0026] like Figures 1 to 4 As shown, based on Embodiment 1, it also includes two elastic telescopic rods 18 and two pressure sensors 19. The lower part of the piston rods of the two push cylinders 3 is equipped with elastic telescopic rods 18, and the ends of the two elastic telescopic rods 18 are respectively connected to the two pressure sensors 19. The two pressure sensors 19 are respectively installed on the two lifting platforms 2. It also includes a grating head 20 and a grating ruler 21. The grating head 20 is respectively installed on the end of the lifting platform 2, and the grating ruler 21 is respectively installed on the frame 1. The grating head 20 and the grating ruler 21 are aligned. It also includes two fine-tuning motors 22 and two half-wheels 23. The two fine-tuning motors 22 are respectively installed on the end of the two lifting platforms 2, and the two half-wheels 23 are respectively installed on the output shafts of the two fine-tuning motors 22. The cams of the two half-wheels 23 respectively engage with the two frames 1.

[0027] When the piston rods of the two push cylinders 3 extend downwards and push the first pressure roller 4 and the second pressure roller 5 through the two lifting platforms 2 to roll the film, the protrusion of the half-wheel 23 disengages from the two frames 1, the two elastic telescopic rods 18 are compressed, and the two pressure sensors 19 are simultaneously subjected to pressure. The two pressure sensors 19 detect the pressure and adjust the extension and retraction of the piston rods of the two push cylinders 3 according to the detected pressure. The grating head 20 and the grating ruler 21 work together to measure the displacement of the ends of the lifting platforms 2. Corresponding grating heads 20 and grating rulers 21 are set on the ends of the two lifting platforms 2 and on the two frames 1, so as to measure the displacement of the two lifting platforms 2. The displacement at the ends is measured. After the two lifting platforms 2 descend to their positions, the two fine-tuning motors 22 drive the two half-wheels 23 to rotate, so that the protruding parts of the two half-wheels 23 rub against the two frames 1 respectively. Through the reaction force, the height of the ends of the two lifting platforms 2 is finely adjusted. When the two half-wheels 23 rotate in the reverse direction and rub against the two frames 1, the ends of the two lifting platforms 2 are finely adjusted downward. When the two half-wheels 23 rotate in the forward direction and rub against the two frames 1, the ends of the two lifting platforms 2 are finely adjusted upward. The amount of fine-tuning is adjusted according to the detection amount of the grating head 20 and the grating ruler 21, so that the two ends of the two lifting platforms 2 keep the height consistent, thereby improving the pressure accuracy of the first pressure roller 4 and the second pressure roller 5.

[0028] like Figures 1 to 6As shown, the pressure device for cold foil stamping of packaging boxes of this utility model, during operation, firstly, the packaging box plate is conveyed to the bottom of the first pressure roller 4 and the second pressure roller 5. The piston rods of the two push cylinders 3 extend downward and push the two lifting platforms 2 down along the two frames 1 respectively, so that the first pressure roller 4 and the second pressure roller 5 roll the packaging box plate. Then, the pressure is detected by two pressure sensors 19, and the fine adjustment is adjusted according to the detection amount of the grating head 20 and the grating ruler 21. The fine adjustment motor 22 drives the half wheel 23 to rotate, so that the two ends of the two lifting platforms 2 To maintain a high degree of consistency, the pressure accuracy of the first pressure roller 4 and the second pressure roller 5 is improved, so that the film is cold-pressed onto the packaging box board. During this process, the second pressure roller 5 drives the reciprocating screw 8 to rotate through the second transmission wheel 16, the transmission belt 17 and the first transmission wheel 15. The reciprocating screw 8 drives the two upper scrapers 9 and the lower scrapers 10 to slide back and forth synchronously along the left and right sides of the optical axis 7, respectively. This allows the two lower scrapers 10 to scrape the film from left to right, giving the film a certain tension. Finally, the film is completely smoothed to reduce wrinkles.

[0029] The main functions achieved by this utility model are:

[0030] 1. Two clutch plate mechanisms are used to move the film left and right to scrape it, giving the film a certain tension and scraping it flat all over, reducing wrinkles and improving work efficiency.

[0031] 2. The angles of the two lower scrapers 10 can be adjusted so that the lower scrapers 10 only scrape the film smooth when they move outward;

[0032] 3. It can detect the pressure applied and adjust the level of the first pressure roller 4 and the second pressure roller 5 to improve the pressure application accuracy.

[0033] The pressure device for cold foil stamping of packaging boxes of this utility model has common mechanical installation, connection and setting methods. As long as it can achieve its beneficial effect, it can be implemented. The frame 1, lifting platform 2, push cylinder 3, first pressure roller 4, second pressure roller 5, optical shaft 7, reciprocating lead screw 8, lower scraper 10, hinge shaft 11, gear one 12, stepper motor 13, gear two 14, transmission wheel one 15, transmission wheel two 16, transmission belt 17, elastic telescopic rod 18, pressure sensor 19, grating head 20, grating ruler 21, fine adjustment motor 22 and half wheel 23 of the pressure device for cold foil stamping of packaging boxes of this utility model are purchased from the market. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0034] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A pressure device for cold foil stamping printing on packaging boxes, comprising two frames (1), two lifting platforms (2), two push cylinders (3), a first pressure roller (4), and a second pressure roller (5), wherein the two frames (1) are arranged opposite to each other, the two lifting platforms (2) are slidably mounted on the two frames (1) respectively, the fixed ends of the two push cylinders (3) are respectively mounted on the two frames (1), the piston rods of the two push cylinders (3) are respectively connected to the two lifting platforms (2), and the two ends of the first pressure roller (4) and the second pressure roller (5) are respectively rotatably connected to the two lifting platforms (2) through rotating shafts; characterized in that, It also includes two mounting brackets (6), an optical shaft (7), a reciprocating screw (8) and two separation plate mechanisms. One end of the two mounting brackets (6) is connected to the two lifting platforms (2) respectively, and the other end of the two mounting brackets (6) extends out of the outside of the second pressure roller (5). The two ends of the optical shaft (7) and the reciprocating screw (8) are connected to the two mounting brackets (6) respectively. The two separation plate mechanisms are respectively mounted on the optical shaft (7) and the reciprocating screw (8). The two separation plate mechanisms are driven by the reciprocating screw (8) to move relative to each other along the optical shaft (7).

2. The pressure device for cold foil stamping printing on packaging boxes as described in claim 1, characterized in that, The clutch plate mechanism includes an upper scraper (9), a lower scraper (10), a hinge shaft (11), and a flipping assembly. The upper scraper (9) is slidably connected to the optical shaft (7) and is driven by the reciprocating screw (8). The upper end of the lower scraper (10) is rotatably connected to the lower end of the upper scraper (9) through the hinge shaft (11). The flipping assembly is installed on the upper scraper (9) and is used to adjust the tilt angle of the lower scraper (10).

3. The pressure device for cold foil stamping printing on packaging boxes as described in claim 2, characterized in that, The flipping assembly includes gear one (12), stepper motor (13) and gear two (14). Gear one (12) is concentrically mounted on hinge shaft (11), stepper motor (13) is mounted on upper scraper (9), and gear two (14) is concentrically mounted on the output shaft of stepper motor (13). Gear two (14) meshes with gear one (12).

4. The pressure device for cold foil stamping printing on packaging boxes as described in claim 1, characterized in that, It also includes a first transmission wheel (15), a second transmission wheel (16) and a transmission belt (17). The first transmission wheel (15) is concentrically mounted on the reciprocating screw (8), the second transmission wheel (16) is concentrically mounted on the shaft of the second pressure roller (5), and the transmission belt (17) is fitted on the first transmission wheel (15) and the second transmission wheel (16).

5. The pressure device for cold foil stamping printing on packaging boxes as described in claim 1, characterized in that, It also includes two elastic telescopic rods (18) and two pressure sensors (19). The lower part of the piston rod of the two push cylinders (3) is equipped with elastic telescopic rods (18). The ends of the two elastic telescopic rods (18) are respectively connected to the two pressure sensors (19). The two pressure sensors (19) are respectively installed on the two lifting platforms (2).

6. The pressure device for cold foil stamping printing on packaging boxes as described in claim 5, characterized in that, It also includes a grating head (20) and a grating ruler (21). The grating head (20) is installed on the end of the lifting platform (2), and the grating ruler (21) is installed on the frame (1). The grating head (20) and the grating ruler (21) are aligned.

7. The pressure device for cold foil stamping printing on packaging boxes as described in claim 6, characterized in that, It also includes two fine-tuning motors (22) and two half-wheels (23). The two fine-tuning motors (22) are respectively installed on the ends of the two lifting platforms (2), and the two half-wheels (23) are respectively installed on the output shafts of the two fine-tuning motors (22). The cams of the two half-wheels (23) respectively engage with the two frames (1) through friction.

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