Differential gold stamping roller set
By setting raised blocks on the hot stamping roller and using a heating device to achieve multiple hot stamping processes at the same roller height, the problems of registration accuracy and equipment complexity are solved, thereby improving the production efficiency and quality of cigarette packaging.
Patent Information
- Application Number
- CN202520321642.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-05-15
- Estimated Expiration
- 2035-02-26
AI Technical Summary
Existing hot stamping processes in cigarette packaging have drawbacks, including high requirements for product registration accuracy, difficulty in equipment performance and manual operation, leading to uncontrollable production processes and high scrap rates.
The system employs a differential hot stamping roller assembly, which includes first and second raised blocks on the hot stamping roller for engraving different patterns. Heat is transferred to the roller surface by heating oil through a heating device, enabling hot stamping of both halftone and solid patterns at the same roller height, thus reducing the complexity of equipment and manual operation.
It improves production efficiency and product quality, reduces scrap rate, and achieves high-precision registration of multiple hot stamping processes on the same equipment. It has a wide range of applications and is highly practical.
Smart Images
Figure CN224240659U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hot stamping roller technology, and in particular to a differential hot stamping roller assembly. Background Technology
[0002] Hot stamping is a widely used technique in cigarette packaging, applied to labels, cartons, and wrapping paper. This process creates a shimmering metallic effect on these materials, enhancing the product's aesthetics and market appeal.
[0003] The development of this new product required the use of two different hot stamping processes. Through process research, it was determined that the product utilizes three core hot stamping technologies: anilox, regular hot stamping, and overprinting. Using traditional production processes, different stamping effects would require separate printing plates, achieved through two-color printing followed by registration. The product registration accuracy must be within ±0.08mm, placing higher demands on equipment performance and operator skill. The numerous uncontrollable factors in the production process led to a sharp increase in the scrap rate. Utility Model Content
[0004] The technical problem to be solved by this utility model is to address the above-mentioned shortcomings of the existing technology by providing a differential hot stamping roller group, which realizes differential hot stamping process on the same roller, improves production efficiency and pass rate, and has the characteristics of wide applicability and strong practicality.
[0005] The technical solution adopted by this utility model is as follows: a differential hot stamping roller assembly, including mounting plates arranged on both sides, with hot stamping rollers rotatably mounted on the mounting plates on both sides. The hot stamping rollers are provided with multiple first protrusions for hot stamping halftone patterns, and the multiple first protrusions are arranged linearly around the outer surface of the hot stamping rollers. Between two adjacent rows of first protrusions, there are multiple second protrusions for hot stamping solid patterns, and the second protrusions are arranged linearly around the outer surface of the hot stamping rollers. A lower pressure roller is provided above the hot stamping rollers, and the two ends of the lower pressure rollers are rotatably mounted on the mounting plates on both sides. A heating chamber is opened inside the hot stamping rollers, and heating oil is provided in the heating chambers. A heating device for heating the heating oil is provided at one end of the hot stamping rollers.
[0006] As a further improvement, the heating device includes a rotary joint and a heating rod with a thermocouple. The rotary joint is mounted on the machine body and connected to one end of the hot stamping roller. The input end of the rotary joint is connected to an oil reservoir. The heating rod is mounted on the rotary joint, and the heating end of the heating rod extends into the heating chamber.
[0007] Furthermore, the other end of the hot stamping roller is connected to a drive motor, which is mounted on a mounting plate.
[0008] Furthermore, the oil storage tank is equipped with a level pipe, one end of which is connected to the lower end of the oil storage tank, and the other end of which is connected to the upper end of the oil storage tank.
[0009] Furthermore, the first protrusion and the second protrusion have the same thickness.
[0010] Furthermore, the oil storage tank is positioned higher than the hot stamping roller, and the oil storage tank is connected to the rotary joint via an infusion pipe, which is equipped with a control switch.
[0011] Furthermore, the outermost layer of the lower pressure roller is wrapped with a rubber layer, and the hardness of the rubber layer is 40-80HA.
[0012] Beneficial effects
[0013] Compared with the prior art, this utility model has the following advantages:
[0014] This utility model discloses a differential hot stamping roller assembly. In use, firstly, a halftone pattern and a solid pattern are engraved on the first and second raised blocks according to requirements. Then, the hot stamping roller is mounted on the hot stamping equipment, passing through the electroplated aluminum foil and the substrate. The heating chamber inside the hot stamping roller is filled with heating oil through the oil reservoir, and the heating oil is heated by the heating rod of the heating device. After the temperature rises, the heat is transferred to the first and second raised blocks on the hot stamping roller, and then to the roller surface through internal heating. The electroplated aluminum foil is transferred to the substrate through heat transfer. During the hot stamping process, the two patterns have different engraving processes. Under the pressure of the lower roller, they are made to be processed at the same roller height, ensuring the clarity and delicacy of the halftone pattern and the fullness of the solid pattern. This solves the problem of needing to separate plates for hot stamping and registration for two different processes, reduces the use of single-color hot stamping units, effectively improves production efficiency and product quality, and has the characteristics of strong practicality and wide applicability. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;
[0016] Figure 2 This is an enlarged schematic diagram of the hot stamping roller in this utility model;
[0017] Figure 3 This is an enlarged cross-sectional view of the hot stamping roller in this utility model.
[0018] The components are: 1-mounting plate, 2-heating device, 3-first protrusion, 4-second protrusion, 5-lower pressure roller, 6-hot stamping roller, 7-infusion pipe, 8-oil storage tank, 9-liquid level pipe, 10-industrial socket, 11-heating chamber, 12-heating oil, 13-drive motor, 14-control switch, 21-heating rod, 22-rotary joint. Detailed Implementation
[0019] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.
[0020] See Figure 1-3 As shown, this utility model discloses a differential hot stamping roller assembly, comprising mounting plates 1 arranged on both sides, with hot stamping rollers 6 rotatably mounted on the mounting plates 1. Each hot stamping roller 6 has multiple first protrusions 3 for hot stamping mesh patterns, arranged linearly around the outer surface of the roller. Between adjacent rows of first protrusions 3 are multiple second protrusions 4 for hot stamping solid patterns, also arranged linearly around the outer surface of the roller. A lower pressure roller 5 is positioned above the roller 6, with both ends rotatably mounted on the mounting plates 1. A heating chamber 11 is formed inside the roller 6, containing heating oil 12. A heating device 2 for heating the heating oil 12 is located at one end of the roller 6. In use, mesh patterns and solid patterns are first engraved on the first protrusions 3 and second protrusions 4 according to requirements, and then hot stamping is performed. The gold roller 6 is mounted on the hot stamping equipment. Electroplated aluminum and the hot stamping substrate are inserted between the hot stamping roller 6 and the lower pressure roller 5. The heating chamber 11 inside the hot stamping roller 6 is filled with heating oil 12 through the oil storage tank 8. The heating oil 12 is heated by the heating rod 21 of the heating device 2. After the temperature rises, the heat is transferred to the first protrusion 3 and the second protrusion block 4 on the hot stamping roller 6. The heat is transferred to the roller surface through internal heating. The electroplated aluminum is transferred to the substrate through heat transfer. During the hot stamping process, there are differences in the engraving process of the two parts of the pattern. Under the pressure of the lower pressure roller 5, they are made to be processed at the same pressure roller height, which ensures the clarity and delicacy of the halftone pattern process, while the solid pattern process is full. This solves the problem of needing to separate plates for hot stamping and then register the two different processes, reduces the use of single-color hot stamping units, effectively improves production efficiency and product quality, and has the characteristics of strong practicality and wide applicability.
[0021] Specifically, the heating device 2 includes a rotary joint 22 and a heating rod 21 with a thermocouple. The rotary joint 22 is mounted on the machine body and is connected to one end of the hot stamping roller 6. The input end of the rotary joint 22 is connected to an oil storage tank 8. The heating rod 21 is mounted on the rotary joint 22 and the heating end of the heating rod 21 extends into the heating chamber 11. The heating rod 21 is electrically connected to an external power source through an industrial plug 10. The heating rod 21 heats the heating oil 12, causing the hot stamping roller 6 to rise to the required temperature. The thermocouple on the heating rod 21 monitors the oil temperature in real time to ensure that the heating temperature meets the process requirements.
[0022] Preferably, the other end of the hot stamping roller 6 is connected to a drive motor 13, which is mounted on the mounting plate 1. The drive motor 13 drives the hot stamping roller 6 to ensure stable operation.
[0023] Furthermore, the oil storage tank 8 is equipped with a liquid level pipe 9. One end of the liquid level pipe 9 is connected to the lower end of the oil storage tank 8, and the other end of the liquid level pipe 9 is connected to the upper end of the oil storage tank 8. The liquid level pipe 9 is a transparent pipe. When the heating oil in the hot stamping roller 6 is heated, it expands and flows back, so that the liquid level in the liquid level pipe 9 in the oil storage tank 8 can be observed to ensure that the heating oil 12 in the hot stamping roller 6 is full.
[0024] Furthermore, the first protrusion 3 and the second protrusion 4 have the same thickness, ensuring that the first protrusion 3 and the second protrusion 4 can be pressed simultaneously, ensuring the clarity and delicacy of the mesh pattern process, while the solid pattern process is full.
[0025] Furthermore, the oil storage tank 8 is positioned higher than the hot stamping roller 6. The oil storage tank 8 is connected to the rotary joint 22 via a liquid inlet pipe 7. A control switch 14 is provided on the liquid inlet pipe 7, so that the heating oil 12 in the oil storage tank 8 can replenish the heating chamber 11 in a timely manner under the action of gravity.
[0026] Furthermore, the outermost layer of the lower pressure roller 5 is wrapped with a rubber layer with a hardness of 40-80HA, which increases the friction of the lower pressure roller 5, making the hot stamping roller 6 run more smoothly with the substrate, less prone to slippage, and ensuring the hot stamping effect.
[0027] In this embodiment, a differential hot stamping roller assembly is used to engrave a halftone pattern and a solid pattern on the first protrusion 3 and the second protrusion 4 according to requirements. Then, the hot stamping roller 6 is installed on the hot stamping equipment. Electroplated aluminum and the hot stamping substrate are inserted between the hot stamping roller 6 and the lower pressure roller 5. The heating chamber 11 inside the hot stamping roller 6 is filled with heating oil 12 through the oil tank 8. The heating oil 12 is heated by the heating rod 21 of the heating device 2. After the temperature rises, the heat is transferred to the first protrusion 3 and the second protrusion 4 on the hot stamping roller 6. The heat is transferred to the roller surface through internal heating. The electroplated aluminum is transferred to the substrate through heat transfer. During the hot stamping process, the engraving process of the two parts of the pattern is different. Under the pressure of the lower pressure roller 5, they are made to be processed at the same pressure roller height, ensuring that the halftone pattern process is clear and delicate, while the solid pattern process is full. This solves the problem of having to separate plates for hot stamping and then register the two different processes, reduces the use of single-color hot stamping units, effectively improves production efficiency and product quality. This utility model provides a differential hot stamping roller assembly, which enables differential hot stamping processes on the same roller, improving production efficiency and pass rate. It has the characteristics of wide applicability and strong practicality.
[0028] 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 modifications and improvements can be made without departing from the structure of the present utility model. These modifications and improvements will not affect the effectiveness of the present utility model or the practicality of the patent.
Claims
1. A differential hot stamping roller assembly, characterized in that, The device includes mounting plates (1) arranged on both sides, on which hot stamping rollers (6) are rotatably mounted. The hot stamping rollers (6) are provided with multiple first protrusions (3) for hot stamping mesh patterns. The multiple first protrusions (3) are arranged linearly around the outer surface of the hot stamping rollers (6). Between two adjacent rows of first protrusions (3), there are multiple second protrusions (4) for hot stamping solid patterns. The second protrusions (4) are arranged linearly around the outer surface of the hot stamping rollers (6). A pressure roller (5) is provided above the hot stamping rollers (6). The two ends of the pressure roller (5) are rotatably mounted on the mounting plates (1) on both sides. A heating chamber (11) is provided inside the hot stamping rollers (6). Heating oil (12) is provided inside the heating chambers (11). A heating device (2) for heating the heating oil (12) is provided at one end of the hot stamping rollers (6).
2. The differential hot stamping roller assembly according to claim 1, characterized in that, The heating device (2) includes a rotary joint (22) and a heating rod (21) with a thermocouple. The rotary joint (22) is mounted on the machine body and is connected to one end of the hot stamping roller (6). The input end of the rotary joint (22) is connected to an oil storage tank (8). The heating rod (21) is mounted on the rotary joint (22) and the heating end of the heating rod (21) extends into the heating chamber (11).
3. The differential hot stamping roller assembly according to claim 2, characterized in that, The hot stamping roller (6) is connected to a drive motor (13) at the other end, and the drive motor (13) is mounted on the mounting plate (1).
4. A differential hot stamping roller assembly according to claim 2, characterized in that, The oil storage tank (8) is equipped with a liquid level pipe (9), one end of which is connected to the lower end of the oil storage tank (8), and the other end of which is connected to the upper end of the oil storage tank (8).
5. A differential hot stamping roller assembly according to claim 1, characterized in that, The first protrusion (3) and the second protrusion (4) have the same thickness.
6. A differential hot stamping roller assembly according to claim 2, characterized in that, The oil storage tank (8) is positioned higher than the hot stamping roller (6). The oil storage tank (8) is connected to the rotary joint (22) via an infusion pipe (7). A control switch (14) is provided on the infusion pipe (7).
7. A differential hot stamping roller assembly according to claim 2, characterized in that, The outermost layer of the lower pressure roller (5) is wrapped with a rubber layer, and the hardness of the rubber layer is 40-80HA.