Jumping device for printing and cold ironing

Abstract

The utility model discloses a leapfrogging device for printing and cold ironing, which comprises an impression cylinder and a blanket cylinder, both the impression cylinder and the blanket cylinder are arranged on a mounting frame, an electrochemical aluminum foil penetrates through the impression cylinder and the blanket cylinder, a fixing plate is mounted on one side of the mounting frame far away from the blanket cylinder, and second motors are mounted on the left side and the right side of the fixing plate. The output ends of the second motors on the two sides are provided with an unwinding roller and a winding roller through couplings correspondingly, sliding grooves used for preventing the electrochemical aluminum foil from being pulled are formed in the left side and the right side of the mounting frame correspondingly, and the sliding grooves are of an arc-shaped structure. According to the leapfrogging device for printing and cold ironing, the sliding groove is of an arc-shaped structure, the top of the sliding rod is sleeved with the vertical rod, the sliding rod moves left and right to drive the vertical rod to be synchronous, and then electrochemical aluminum foil is kept in a straightened state all the time in the position changing process of the guide roller and is prevented from loosening in the reciprocating motion process of the guide roller; and the electrochemical aluminum foil is pulled and fed back in cooperation with the embossing and neutral period of the embossing cylinder.

Description

Technical Field

[0001] This utility model relates to the field of printing step-skipping technology, specifically a step-skipping device for cold foil stamping. Background Technology

[0002] Electroplated aluminum foil is a hot stamping material made by coating and vacuum evaporation onto a thin film substrate, then adding a layer of metal foil. In cold foil stamping, the electroplated aluminum foil needs to be precisely positioned and transferred. Printed cold foil stamping refers to pressing the metal material from the electroplated aluminum foil onto the surface of the printed material using pressure. The step-step device used in printed cold foil stamping is a device for inline cold foil stamping on printing presses. It mainly includes an unwinding device, a rewinding device, an anilox roller, and a drive mechanism. The working principle of the step-step device is to utilize the characteristic that the rollers are not printing during idle periods. By precisely controlling the step length and positioning accuracy of the foil, the reciprocating motion of the anilox roller controls the conveying speed of the electroplated aluminum foil, improving efficiency. The use of electroplated aluminum foil is increased, saving costs and protecting the environment. The diagonal stretching step is a composite motion control technology in cold foil stamping. It combines the diagonal stretching of electroplated aluminum foil with precise stepping to achieve special processes for irregular hot foil stamping or gradient effects. The diagonal stretching method mainly includes manual diagonal stretching and electric diagonal stretching. The diagonal stretching method is mainly used to adjust the registration of the printing machine to ensure that the pattern of the printed product is accurately positioned on the diagonal of the electroplated aluminum foil. Manual diagonal stretching requires stopping the machine, while electric diagonal stretching does not. The automatic diagonal stretching method is more efficient and precise, suitable for mass production and automated production lines, and can significantly improve production efficiency and printing accuracy.

[0003] In conventional online cold foil stamping systems, the transport of electroplated aluminum foil exhibits non-intermittent dynamic characteristics: during the operation of the printing press, the unwinding and rewinding mechanisms maintain continuous constant speed movement of the foil. However, due to mechanical limitations, the hot foil stamping cylinder has a fixed phase gap area (usually accounting for 30%-40% of the cylinder's circumference). When the cylinder rotates to the gap area, although the foil still moves linearly along the preset tension path, the hot pressing module loses contact with the substrate, resulting in no effective transfer reaction of the foil in that section. This periodic ineffective transport phenomenon causes approximately 15%-25% of the process foil loss. Its essence stems from the phase mismatch between the intermittent hot foil stamping action of the cylinder and the continuous foil transport system, constituting a systemic efficiency defect that urgently needs to be addressed in the cold foil stamping process. Utility Model Content

[0004] The purpose of this invention is to provide a step-by-step device for cold foil stamping in printing, so as to solve the problem of the intermittent hot foil stamping action of the current step-by-step device on the market and the motion phase mismatch between the continuous foil conveying system, as mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a step-by-step device for cold foil stamping, comprising an impression cylinder and a rubber cylinder, both of which are mounted on a mounting frame. An electroplated aluminum foil passes between the impression cylinder and the rubber cylinder. A fixing plate is mounted on the side of the mounting frame away from the rubber cylinder. Motors are mounted on both the left and right sides of the fixing plate. The output ends of the motors on both sides are respectively mounted with an unwinding roller and a rewinding roller via couplings. Slide grooves for preventing the electroplated aluminum foil from being pulled are provided on both the left and right sides of the mounting frame. The slide grooves are arc-shaped.

[0006] Preferably, guide rollers are provided on both the left and right sides of the mounting frame, the unwinding roller and the winding roller have the same winding amount per unit time, and electroplated aluminum foil is attached to the outside of the unwinding roller, the winding roller and the guide rollers. The embossing cylinder and the rubber cylinder are both located between the two guide rollers.

[0007] Preferably, the mounting bracket has a vertical through slot, a motor is mounted on the side of the mounting bracket, and a threaded rod is mounted on the output end of the motor via a coupling. Sliding rods are threadedly connected to both sides of the threaded rod, and the sliding rods slide on the fixed plate.

[0008] Preferably, the sliding rod has an "L" shaped structure, with a vertical rod sliding on the top of the sliding rod, and a mounting block installed at the end of the vertical rod near the mounting frame.

[0009] Preferably, an automatic registration device is installed at the other end of the mounting block, and an impression cylinder is installed at the output end of the automatic registration device.

[0010] Preferably, the mounting block extends through the interior of the slide groove, and both its front and rear ends protrude from the sides of the mounting frame.

[0011] Preferably, a fixing rod is installed on the rotating shaft of the impression cylinder and the rubber cylinder near the mounting frame, and a connecting rod is installed on the side of the fixing rod near the mounting frame. The connecting rod is slidably arranged with the vertical rod and passes through the interior of the vertical rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The chute has an arc-shaped structure, with the vertical rod fitted onto the top of the sliding rod. The sliding rod moves left and right, causing the vertical rod to move synchronously. Due to the structure of the chute, the vertical rod moves up and down synchronously as it moves left and right. The vertical rod causes the mounting block to slide inside the chute, thus keeping the electroplated aluminum foil taut during the change of the guide roller's position. This prevents the electroplated aluminum foil from loosening during the reciprocating motion of the guide roller, which would affect the normal printing of the electroplated aluminum foil surface by the printing cylinder and prevent wrinkles. It also works in conjunction with the printing and rest periods of the printing cylinder to pull and return the electroplated aluminum foil. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

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

[0016] Figure 3 This is a schematic diagram of the rear section structure of the mounting bracket of this utility model;

[0017] Figure 4 This is a schematic diagram of the vertical rod structure of this utility model;

[0018] Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0019] In the diagram: 1. Mounting frame; 2. Motor 1; 3. Motor 2; 4. Slide groove; 5. Electroplated aluminum foil; 6. Unwinding roller; 7. Fixing plate; 8. Rewinding roller; 9. Through groove; 10. Imprinting cylinder; 11. Rubber cylinder; 12. Sliding rod; 13. Threaded rod; 14. Vertical rod; 15. Connecting rod; 16. Mounting block; 17. Guide roller; 18. Fixing rod. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-5 The present invention provides the following technical solution:

[0022] A step-by-step device for cold foil stamping includes an impression cylinder 10 and a rubber cylinder 11. Both the impression cylinder 10 and the rubber cylinder 11 are mounted on a mounting frame 1. An electroplated aluminum foil 5 passes between the impression cylinder 10 and the rubber cylinder 11. A fixing plate 7 is mounted on the side of the mounting frame 1 away from the rubber cylinder 11. Motors 3 are mounted on both sides of the fixing plate 7. The output ends of the motors 3 on both sides are respectively mounted with a unwinding roller 6 and a rewinding roller 8 via couplings. An automatic registration device is mounted on the other end of the mounting block 16. The output end of the automatic registration device is mounted with the impression cylinder 10.

[0023] The automatic registration device collects the positional deviation of the color mark through a color mark sensor or camera, and then sends a command to the servo motor built into the impression cylinder 10 to achieve vertical registration, thereby controlling the left and right position of the electroplated aluminum foil 5, so that one edge of the electroplated aluminum foil 5 is used as a reference to achieve automatic diagonal pulling.

[0024] Combination Figures 1-4As shown, the mounting frame 1 has grooves 4 on both the left and right sides to prevent the electroplated aluminum foil 5 from being pulled. The grooves 4 are arc-shaped, and the unwinding roller 6 and the winding roller 8 are located at the center of the corresponding side grooves 4.

[0025] The mounting bracket 1 has a vertical through slot 9. A motor 2 is mounted on the side of the mounting bracket 1. A threaded rod 13 is mounted on the output end of the motor 2 through a coupling. Sliding rods 12 are threadedly connected to both sides of the threaded rod 13. The sliding rods 12 slide on the fixed plate 7.

[0026] In use, when the impression cylinder 10 is in idle period, motor 2 3 stops driving, at which time the unwinding roller 6 stops unwinding and the take-up roller 8 stops taking up. Motor 2 is started, and motor 2 drives the threaded rod 13 to rotate. The rotation of the threaded rod 13 causes the sliding rods 12 on both sides to move in the same direction. The sliding rods 12 drive the vertical rod 14 to move synchronously. The vertical rod 14 is sleeved on the end of the sliding rod 12. Since the vertical rod 14 and the mounting block 16 are fixedly connected, the movement of the vertical rod 14 drives the mounting block 16 to move synchronously. The mounting block 16 is locked in the sliding groove 4 synchronously. Due to the structure of the sliding groove 4, the sliding groove... The structure 4 pulls the mounting block 16, which slides inside the slide groove 4. The mounting block 16 pulls the vertical rod 14, which rises and falls at the top of the sliding rod 12. The fixed rod 18 drives the guide roller 17 to move laterally. The guide roller 17 drives the electroplated aluminum foil 5 to move. At this time, the imprinting cylinder 10 rotates to imprint, so that the electroplated aluminum foil 5 can be imprinted. By rotating the threaded rod 13 in both directions, the guide roller 17 can reciprocate, which, in conjunction with the imprinting and idle periods of the imprinting cylinder 10, pulls and returns the electroplated aluminum foil 5.

[0027] The sliding rod 12 has an "L" shaped structure, and a vertical rod 14 slides on the top of the sliding rod 12. A mounting block 16 is installed on the end of the vertical rod 14 near the mounting frame 1.

[0028] Guide rollers 17 are provided on both the left and right sides of the mounting frame 1. The unwinding roller 6 and the winding roller 8 have the same unwinding and winding amount per unit time. Electroplated aluminum foil 5 is attached to the outside of the unwinding roller 6, the winding roller 8 and the guide rollers 17. The impression cylinder 10 and the rubber cylinder 11 are located between the two guide rollers 17. The mounting block 16 passes through the interior of the slide groove 4. Both ends of the mounting block 16 protrude from the sides of the mounting frame 1. The rotating shaft of the impression cylinder 10 and the rubber cylinder 11 near the end of the mounting frame 1 is equipped with a fixing rod 18. A connecting rod 15 is installed on the side of the fixing rod 18 near the mounting frame 1. The connecting rod 15 is slidably set with the vertical rod 14 and passes through the interior of the vertical rod 14.

[0029] The vertical rod 14 moves up and down, causing the connecting rod 15 to move synchronously. Since the connecting rod 15 passes through the vertical rod 14, the vertical rod 14 and the connecting rod 15 are slidably arranged. The connecting rod 15 is slidably arranged inside the vertical through groove 9. Therefore, the connecting rod 15 can only move up and down and cannot move laterally. Thus, the connecting rod 15 pulls the vertical rod 14 to move, thereby keeping the height difference between the position of the impression cylinder 10 and the guide roller 17 unchanged during the movement of the guide roller 17. This allows the impression cylinder 10 to fit against the outside of the electroplated aluminum foil 5. The setting of the sliding groove 4 allows the electroplated aluminum foil 5 to remain straight during the adjustment of the guide roller 17, avoiding wrinkles in the electroplated aluminum foil 5 that would affect printing.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A printing and cold stamping device comprising a platen cylinder (10) and a blanket cylinder (11), both of which are provided on a mounting frame (1), and an electrolytic aluminum foil (5) is passed between the platen cylinder (10) and the blanket cylinder (11), characterized in that, The mounting frame (1) is provided with a fixed plate (7) on the side away from the rubber roller (11), and the left and right sides of the fixed plate (7) are provided with motor two (3). The output ends of the two motors (3) are provided with unwinding rollers (6) and winding rollers (8) through couplings. The left and right sides of the mounting frame (1) are provided with sliding grooves (4) for preventing the aluminum foil (5) from being pulled.

2. The skip printing device for cold transfer printing according to claim 1, wherein: The left and right sides of the mounting frame (1) are provided with guide rollers (17). The unwinding roller (6) and the winding roller (8) have equal winding amounts in unit time. The unwinding roller (6), the winding roller (8) and the guide roller (17) are externally attached with the aluminum foil (5). The impression cylinder (10) and the rubber roller (11) are located between the two guide rollers (17).

3. The skip printing device for cold transfer printing according to claim 1, wherein: The mounting frame (1) is provided with a vertical through groove (9). The mounting frame (1) is provided with a motor one (2) on the side edge. The output end of the motor one (2) is provided with a threaded rod (13) through a coupling. The left and right sides of the threaded rod (13) are threadedly connected with sliding rods (12). The sliding rods (12) slide on the fixed plate (7).

4. The step-jump device for printing cold ironing according to claim 3, characterized in that: The sliding rod (12) is of "L" shape. The top of the sliding rod (12) is slidably provided with a vertical rod (14). One end of the vertical rod (14) close to the mounting frame (1) is provided with a mounting block (16).

5. The skip printer of claim 4, wherein: The other end of the mounting block (16) is provided with an automatic register device. The output end of the automatic register device is provided with an impression cylinder (10).

6. The skip printing device for cold transfer printing according to claim 5, wherein: The mounting block (16) penetrates the inside of the sliding groove (4). The front and rear ends of the mounting block (16) protrude from the left and right sides of the mounting frame (1).

7. The skip printing device for cold transfer printing according to claim 1, wherein: The rotating shafts of the impression cylinder (10) and the rubber roller (11) close to the mounting frame (1) are provided with fixed rods (18). The fixed rods (18) close to the mounting frame (1) are provided with connecting rods (15). The connecting rods (15) are slidably arranged with the vertical rod (14). The connecting rods (15) penetrate the inside of the vertical rod (14).

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