Buffer type cold stamping device

Abstract

The utility model discloses a buffering type cold stamping device which comprises a main conveying unit, an auxiliary conveying unit and a stamping unit which are connected through stamping foil, and the stamping unit comprises a stamping roller and a first lifting assembly controlling the stamping roller to ascend and descend. The auxiliary conveying unit comprises a first tensioning roller, a transmission structure pushing the first tensioning roller to generate displacement and a first return structure controlling the first tensioning roller to return to the original position, one end of the transmission structure is connected with the first return structure, and the other end of the transmission structure is connected with the lifting end of the first lifting assembly. According to the cold stamping device, the displacement of the first tensioning roller is controlled through rotation of the transmission assembly to compensate the shrinkage or loosening allowance, so that the stamping foil is better in a tensioning state in the stamping process, smooth conveying of the stamping foil is facilitated, and the stamping precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cold stamping, in particular to a buffer type cold stamping device. Background Art

[0002] Cold stamping technology refers to a method of transferring a stamping foil to a printing substrate using a UV adhesive. The UV adhesive is printed on the printing substrate (such as backing paper), cured, and the stamping foil is compounded with the printing substrate by means of a pressure roller. Then, the excess stamping foil is peeled off from the printing substrate, and only the stamping foil is transferred to the printing substrate at the part coated with the adhesive to obtain the required stamped pattern.

[0003] In the existing cold stamping device, when the stamping assembly descends to stamp the stamping foil and the stamping material, due to the downward pressure of the stamping roller and the fixing and pressing effects of other conveying rollers, the stamping foil is under pressure and in a tensioned state. Since this tension cannot be buffered, when the stamping roller finishes stamping, the stamping foil is prone to deviation after returning to the relaxed state, which is not conducive to the smooth conveyance of the stamping foil and the subsequent stamping accuracy.

[0004] Therefore, how to make a buffer type cold stamping device to compensate for the shrinkage or relaxation margin, so that the stamping foil is better in a tensioned state during the stamping process, facilitating the smooth conveyance of the stamping foil and improving the stamping accuracy, has become an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a buffer type cold stamping device, which rotates through a transmission component to compensate for the shrinkage or relaxation margin, so that the stamping foil is better in a tensioned state during the stamping process, facilitating the smooth conveyance of the stamping foil and improving the stamping accuracy.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a buffer type cold stamping device, which includes a main transmission unit, an auxiliary transmission unit, and a stamping unit connected by a stamping foil. The stamping unit includes a stamping roller and a first lifting component for controlling the lifting of the stamping roller. The auxiliary transmission unit includes a first tensioning roller, a transmission structure for pushing the first tensioning roller to generate displacement, and a first return structure for controlling the first tensioning roller to return to its original position. One end of the transmission structure is connected to the first return structure, and the other end is connected to the lifting end of the first lifting component.

[0008] Further, the transmission structure includes a first rotating rod and a rotating shaft for supporting the rotation of the first rotating rod. One end of the first rotating rod is axially connected to the lifting end of the first lifting component through a shaft hole.

[0009] Further, the restoring structure includes a fixed seat, a return spring telescopically connected within the fixed seat, and a telescopic block connected to the other end of the return spring. The first tensioning roller is rotatably connected to the telescopic block, and the other end of the first rotating rod abuts against the telescopic block.

[0010] Further, the telescopic block is in a first arc structure at the connection with the first rotating rod, and the first rotating rod is in a second arc structure at the connection with the telescopic block, and the first arc structure and the second arc structure fit each other.

[0011] Further, the main transmission unit includes a unwind roller, a winding roller arranged at both ends of the hot stamping unit, a first servo motor for controlling the unwind roller, and a second servo motor for controlling the winding roller.

[0012] Further, the main transmission unit further includes a first adjusting component and a second adjusting component. The hot stamping unit is arranged between the first adjusting component and the second adjusting component. Both the first adjusting component and the second adjusting component include a pair of roller structures rotatably arranged and a second restoring structure for controlling the pair of roller structures to return to their original positions.

[0013] Further, the pair of roller structures includes two second tensioning rollers arranged at intervals and two second rotating rods arranged at intervals. Both ends of the second tensioning rollers are fixedly connected to the second rotating rods, and the second restoring structure is fixedly connected to the middle of the second rotating rods.

[0014] Further, the second restoring structure is a return spring.

[0015] Further, the second restoring structure is a torque motor.

[0016] (1) In the cold hot stamping device of the present utility model, the first lifting component drives the hot stamping roller to generate displacement. The hot stamping foil bears tension under the action of the hot stamping roller. At the same time, when the first lifting component moves up and down, it drives the transmission structure, and the other end of the transmission structure generates a force on the first restoring structure, pushing the first tensioning roller to form a displacement, driving the hot stamping foil to unwind, thereby reducing the tension of the hot stamping foil. When the hot stamping is completed, the first lifting component returns to its original position, driving the transmission structure to return to its original position. The first restoring structure pushes the first tensioning roller to return to its original position under the action of the restoring force, causing the hot stamping foil to contract. The hot stamping foil is pulled back through the main transmission unit to restore the tension of the hot stamping foil. Thus, it realizes compensating for the shrinkage or relaxation margin of the hot stamping foil, so that during the hot stamping process, the hot stamping foil is better in a tensioned state, facilitating the smooth transmission of the hot stamping foil and improving the hot stamping accuracy.

[0017] (2)For the cold stamping device of the present utility model, the first adjustment component is used to compensate for the allowance of shrinkage or relaxation of the stamping foil between the unwind roller and the stamping unit, and the second adjustment component is used to compensate for the allowance of shrinkage or relaxation of the stamping foil between the winding roller and the stamping unit. By rotating the roller assembly, the allowance of shrinkage or relaxation can be further compensated, so that the stamping foil is better in a tensioned state during the stamping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the cold stamping device;

[0019] Figure 2 is a schematic structural diagram of the cold stamping device from the first perspective with one side plate removed;

[0020] Figure 3 is a schematic structural diagram of the cold stamping device from the second perspective with one side plate removed;

[0021] Figure 4 is a schematic structural diagram of the auxiliary conveying unit of the cold stamping device;

[0022] Among them, 1. Main conveying unit; 11. Unwind roller; 12. Winding roller; 13. First servo motor; 14. Second servo motor; 15. First adjustment component; 16. Second adjustment component; 17. Opposing roller structure; 171. Second tensioning roller; 172. Second rotating rod; 18. Second restoring structure; 2. Auxiliary conveying unit; 21. First tensioning roller; 22. Transmission structure; 221. First rotating rod; 222. Rotating shaft; 23. First restoring structure; 231. Fixed seat; 232. Return spring; 233. Telescopic block; 3. Stamping unit; 31. Stamping roller; 32. First lifting component; 33. Heating component; 4. Conveyor belt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present utility model. On the contrary, they are only examples of devices or methods consistent with some aspects of the present utility model.

[0024] To make the purpose, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present utility model belong to the scope protected by the present utility model.

[0025] Hereinafter, embodiments will be described with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the utility model content described in the claims in any way. Further, all the contents of the configurations shown in the following embodiments are not necessarily essential for the solution of the utility model described in the claims.

[0026] As Figures 1 to 4 shown, a buffer type hot stamping device includes a main conveying unit 1, an auxiliary conveying unit 2, and a hot stamping unit 3 connected by a hot stamping foil. The hot stamping unit 3 includes a hot stamping roller 31 and a first lifting assembly 32 for controlling the lifting of the hot stamping roller 31. The auxiliary conveying unit 2 includes a first tensioning roller 21, a transmission structure 22 for pushing the first tensioning roller 21 to generate displacement, and a first restoring structure 23 for controlling the first tensioning roller 21 to return to its original position. One end of the transmission structure 22 is connected to the first restoring structure 23, and the other end is connected to the lifting end of the first lifting assembly 32. When the hot stamping unit 3 performs hot stamping on the hot stamping foil and the printing material, the hot stamping unit 3 controls the hot stamping foil and the printing material to be pressed tightly, thereby laminating the hot stamping foil and the hot stamping material together. That is, the first lifting assembly 32 drives the hot stamping roller 31 to generate displacement, and the hot stamping foil is subjected to tension under the action of the hot stamping roller 31. At the same time, when the first lifting assembly 32 moves up and down, it drives the transmission structure 22, and the other end of the transmission structure 22 generates a force on the first restoring structure 23, pushing the first tensioning roller 21 to generate displacement and driving the hot stamping foil to unwind, thereby reducing the tension of the hot stamping foil. When the hot stamping is completed, the first lifting assembly 32 returns to its original position, driving the transmission structure 22 to return to its original position. The first restoring structure 23 pushes the first tensioning roller 21 to return to its original position under the action of the restoring force, causing the hot stamping foil to contract. The hot stamping foil is pulled back through the main conveying unit 1 to restore the tension of the hot stamping foil. Thus, the allowance for the contraction or relaxation of the hot stamping foil is compensated, so that during the hot stamping process, the hot stamping foil is better in a tensioned state, facilitating the smooth conveyance of the hot stamping foil and improving the hot stamping accuracy.

[0027] Specifically, the transmission structure 22 includes a first rotating rod 221 and a rotating shaft 222 that supports the rotation of the first rotating rod 221. One end of the first rotating rod 221 is connected to the lifting end shaft hole of the first lifting assembly 32. Optionally, the rotating shaft 222 is rotatably connected to the central axis position of the first rotating rod 221. The restoring structure includes a fixed seat 231, a return spring 232 telescopically connected within the fixed seat 231, and a telescopic block 233 connected to the other end of the return spring 232. The first tensioning roller 21 is rotatably connected to the telescopic block 233, and the other end of the first rotating rod 221 abuts against the telescopic block 233. When specifically connected, the cold stamping machine can have two side walls arranged at intervals, the fixed seat 231 is connected to the side wall, the telescopic block 233 is located below the fixed seat 231, the first lifting assembly 32 can be a cylinder or a hydraulic cylinder, the stamping roller 31 is arranged below the first lifting assembly 32. When the stamping roller 31 descends, it can press down the stamping foil, making the stamping foil contact the base paper, and then making the stamping foil and the base paper composite together to form a pattern on the base paper. It also includes a conveyor belt 4 located below the stamping roller 31 for conveying the printing material. When stamping, the first lifting assembly 32 descends, the stamping roller 31 descends, simultaneously driving one end of the first rotating rod 221 to rotate downward and the other end to rotate upward, pushing the telescopic block 233 to move upward, the return spring 232 contracts, and the first tensioning roller 21 rises and follows the stamping foil passively, thereby driving the stamping foil to unwind, so as to reduce the tension of the stamping foil. After stamping, the first lifting assembly 32 rises, driving the first rotating rod 221 to rise, and at the same time the return spring 232 pushes the other end of the first rotating rod 221 to descend, causing the first tensioning roller 21 to descend, so as to pull back the stamping foil. The telescopic block 233 is in a first arc structure at the connection with the first rotating rod 221, and the first rotating rod 221 is in a second arc structure at the connection with the telescopic block 233. The first arc structure and the second arc structure fit each other, and the arc surface structure facilitates the first rotating rod 221 to push the telescopic block 233 upward when rotating.

[0028] Specifically, the main conveying unit 1 includes an unwinding roller 11, a winding roller 12 disposed at both ends of the hot stamping unit 3, a first servo motor 13 for controlling the unwinding roller 11, and a second servo motor 14 for controlling the winding roller 12. The main conveying unit 1 further includes a first adjusting component 15 and a second adjusting component 16. The hot stamping unit 3 is disposed between the first adjusting component 15 and the second adjusting component 16. Both the first adjusting component 15 and the second adjusting component 16 include a pair of roller structures 17 rotatably disposed and a second restoring structure 18 for controlling the pair of roller structures 17 to return to their original positions. During the transportation of the hot stamping foil, the hot stamping foil is sequentially conveyed from the unwinding roller 11, through the first adjusting component 15, the hot stamping unit 3, the second adjusting component 16 to the winding roller 12. The printing material is transported by the second conveying unit, and the second conveying unit can be a conveyor belt 4. The auxiliary conveying unit 2 is disposed between the hot stamping unit 3 and the unwinding roller 11. The first adjusting component 15 is used to compensate for the shrinkage or relaxation margin of the hot stamping foil between the unwinding roller 11 and the hot stamping unit 3, and the second adjusting component 16 is used to compensate for the shrinkage or relaxation margin of the hot stamping foil between the winding roller 12 and the hot stamping unit 3, that is, to compensate for the shrinkage or relaxation margin of the hot stamping foil after hot stamping. When the hot stamping unit 3 performs hot stamping on the hot stamping foil and the printing material, the hot stamping unit 3 presses down the hot stamping foil to laminate the hot stamping foil with the hot stamping material together. Since the hot stamping unit 3 causes a certain displacement of the hot stamping foil, the first adjusting component 15 and the second adjusting component 16 move in opposite directions. The pair of roller components of the first adjusting component 15 and the second adjusting component 16 rotate due to the acting force of the tensile force and overcome the acting force of the restoring structure. When the hot stamping unit 3 finishes hot stamping, the hot stamping unit 3 returns to its original position, the hot stamping foil is pulled back, and the pair of roller structures 17 of the first adjusting component 15 and the second adjusting component 16 rotate quickly in the reverse direction under the elastic force of the restoring structure, that is, the pair of roller structures 17 of the first adjusting component 15 and the second adjusting component 16 return to their original positions. The rotation of the pair of roller components is used to further compensate for the shrinkage or relaxation margin, facilitating the smooth conveyance of the hot stamping foil and improving the hot stamping accuracy.

[0029] Specifically, the pair of roller structures 17 includes two second tension rollers 171 disposed at intervals and two second rotating rods 172 disposed at intervals. Both ends of the second tension rollers 171 are fixedly connected to the second rotating rods 172, and the second restoring structure 18 is fixedly connected to the middle of the second rotating rods 172. The second restoring structure 18 can be a return spring or a torque motor. The hot stamping foil is wound around the two second tension rollers 171 for several turns. When the hot stamping unit 3 descends, the second rotating rods 172 rotate under the acting force of the tensile force of the hot stamping foil, driving the two second tension rollers 171 to rotate by a certain angle. When the hot stamping unit 3 finishes hot stamping, the second restoring structure 18 drives the rotating rods to rotate and reset in the opposite direction to the previous one.

[0030] Specifically, as shown in the figures, the hot stamping unit 3 further includes a heating component 33 for heating the hot stamping roller 31. The heating component 33 can heat the hot stamping roller 31. When hot stamping certain printing materials, heating the hot stamping roller 31 to a certain temperature can achieve a better hot stamping effect. The heating component 33 can be an electromagnetic heating component 33, or a heating tube disposed inside the hot stamping roller 31. Of course, it can also be other forms of heating components 33.

[0031] The above further describes the present utility model by means of specific embodiments. However, it should be understood that this specific description should not be construed as a limitation on the essence and scope of the present utility model. Various modifications made by those of ordinary skill in the art to the above embodiments after reading this specification all fall within the scope protected by the present utility model.

Claims

1. A buffer type cold stamping device, characterized in that: It includes a main transmission unit, an auxiliary transmission unit, and a hot stamping unit connected by hot stamping foil. The hot stamping unit includes a hot stamping roller and a first lifting assembly that controls the lifting and lowering of the hot stamping roller. The auxiliary transmission unit includes a first tensioning roller, a transmission structure that pushes the first tensioning roller to produce displacement, and a first restoring structure that controls the first tensioning roller to return to its original position. One end of the transmission structure is connected to the first restoring structure, and the other end is connected to the lifting end of the first lifting assembly.

2. A buffer type cold stamping device according to claim 1, characterized in that: The transmission structure includes a first rotating rod and a rotating shaft supporting the first rotating rod to rotate. One end of the first rotating rod is connected to the lifting end shaft hole of the first lifting assembly.

3. A buffer type cold stamping device according to claim 2, characterized in that: The return structure includes a fixed seat, a return spring telescopically connected in the fixed seat, and a telescopic block connected to the other end of the return spring. The first tensioning roller is rotatably connected to the telescopic block, and the other end of the first rotating rod abuts against the telescopic block.

4. A buffer type cold stamping device according to claim 3, characterized in that: The telescopic block is in a first arc-shaped structure at the connection with the first rotating rod, and the first rotating rod is in a second arc-shaped structure at the connection with the telescopic block, and the first arc-shaped structure and the second arc-shaped structure fit each other.

5. A buffer type cold stamping device according to claim 1, characterized in that: The main transmission unit comprises an unwinding roller, a winding roller, a first servo motor for controlling the unwinding roller, and a second servo motor for controlling the winding roller, which are arranged at two ends of the hot stamping unit.

6. A buffer type cold stamping device according to claim 5, characterized in that: The main conveying unit also includes a first adjustment component and a second adjustment component, the hot stamping unit is arranged between the first adjustment component and the second adjustment component, and the first adjustment component and the second adjustment component both include a rotatably arranged roller structure and a second return structure for controlling the roller structure to return to its original position.

7. A buffer type cold stamping device according to claim 6, characterized in that: The pair of rollers structure includes two second tensioning rollers arranged at intervals and two second rotating rods arranged at intervals. Both ends of the second tensioning rollers are fixedly connected to the second rotating rods, and the second restoring structure is fixedly connected to the middle of the second rotating rods.

8. A buffer type cold stamping device according to claim 6, characterized in that: The second restoring structure is a restoring spring.

9. A buffer type cold stamping device according to claim 6, characterized in that: The second restoring structure is a torque motor.

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