A manufacturing method of stamping type license plate with combination of frosted and polished character surface

Abstract

The application discloses a manufacturing method of a stamping type license plate with a combination of frosted and smooth character surface effects, which comprises the following steps: characters are engraved on a corona PET film by intaglio printing, the characters are in a convex structure after drying and are attached to the corona PET film; the character-bearing side of the cut corona PET film is in contact with a convex surface of a stamping or roller printing license plate; the rubber roller of a stamping machine is pressed, the speed, temperature and pressure are set, the license plate and the character-bearing corona PET film are moved forward synchronously, and the convex surface of the license plate has a trace of frosted characters; a false-proof film is pressed on the surface of the license plate with the stamping or roller printing ink; when the surface of the stamping or roller printing ink is smooth, the trace of the protruding matte characters appears on the surface of the carbon tape or the roller printing ink of the license plate after the false-proof film is pressed, and the surface of the carbon tape or the roller printing ink around the trace is smooth. The technical scheme has the advantages of reasonable structure design, easy manufacturing, difficulty in imitation, good false-proof performance and good practicability.

Description

Technical Field

[0001] This invention relates to the field of license plate manufacturing technology, specifically to a method for manufacturing stamped license plates that combines a frosted and glossy surface effect for hot-stamped characters. Background Technology

[0002] The existing process for manufacturing stamped license plates typically involves: bonding a flexible reflective film to an aluminum plate, stamping the characters, and then applying hot stamping or roller printing to the surface of the characters to create different colors (usually black) to enhance their recognizability. Based on the final gloss level, the surface finish of the characters is mainly divided into two categories: matte and glossy.

[0003] To meet anti-counterfeiting requirements, various technologies have been employed, such as embedding chips in license plates, setting anti-counterfeiting watermarks in reflective films, or retaining aluminum-plated characters on the surface of carbon ribbons. However, these anti-counterfeiting structures often rely on specific materials or additional markings, which pose a risk of being counterfeited or tampered with, resulting in overall anti-counterfeiting performance that remains unsatisfactory. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a method for manufacturing stamped license plate hot stamping characters that combines frosted and glossy surface effects, which has a reasonable structural design, is easy to manufacture, is not easy to counterfeit, has good anti-counterfeiting performance, and is practical.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for manufacturing stamped license plate characters with a combination of frosted and glossy effects, comprising the following steps: (1) Print characters on a corona-treated PET film using gravure printing. After drying, the characters form a raised structure and are attached to the corona-treated PET film. (2) Cut the corona-treated PET film; (3) The side of the corona-treated PET film with characters is in contact with the raised side of the license plate that has been stamped or rolled. (4) Press the rubber roller of the hot stamping machine, set the speed, temperature and pressure, and make the license plate and the character strip on the corona PET film move forward synchronously. There are traces of frosted characters on the raised surface of the license plate. (5) Press the anti-counterfeiting film onto the reflective film surface of the license plate after hot stamping or roller printing with ink using a hot stamping machine; (6) When the hot stamping or roller printing ink surface is glossy, after the anti-counterfeiting film is pressed, the prominent matte character traces appear on the carbon ribbon or roller printing ink surface of the reflective film, while the surrounding carbon ribbon or roller printing ink surface still presents a glossy surface.

[0006] Preferably, the corona-electrode PET film has a thickness of 36 μm. Characters are printed on the surface of the smooth corona-electrode PET film, and the characters are dried using a drying device to ensure that the characters are fixedly attached to the corona-electrode PET film.

[0007] As a preferred option, the gravure printing rollers should have a mesh count of 80-150, and the drying conditions should be: 70-90℃: 2′30″-4′, 125-150℃: 2′30″-4′.

[0008] As a preferred embodiment, the ink used in gravure printing consists of 100 parts of oil-based carboxyacrylate resin, 2-5 parts of amino curing agent cyanate, 5-10 parts of ethyl acetate, and 5-30 parts of glass powder, wherein the glass powder has a particle size of 5-15 micrometers; it is thoroughly mixed using a high-speed mixer at a stirring speed of 800-1000 rpm.

[0009] Preferably, the printed characters have a matte finish and stand out from the surface of the corona-treated PET film.

[0010] As a preferred option: adjust the pressure of the hot stamping machine according to the softness of the reflective film and the hardness of the surface carbon ribbon and roller printing ink. The pressing pressure is 0.1-1MPa, the speed is 3-8m / min, and the heating temperature is 50-150℃.

[0011] As a preferred option: when making anti-counterfeiting film, the characters are cut out, so that the other areas have a matte finish after ink is printed on them; when laminating reflective film for license plates, the cut-out areas are glossy, while the other areas are matte.

[0012] The beneficial effects of this invention are as follows: Compared with the prior art, this invention has a reasonable structural design and is easy to manufacture. Characters are gravure printed on a corona-treated PET film. After drying, the characters form a raised structure and are attached to the corona-treated PET film. The corona-treated PET film is then cut. The side of the cut corona-treated PET film with characters contacts the raised surface of the license plate, which has been stamped or roller-printed. The rubber roller of the hot stamping machine is pressed together. After setting the speed, temperature, and pressure, the license plate and the character strip on the corona-treated PET film move forward synchronously. The raised surface of the license plate has some frosted character traces. On the reflective film surface of the license plate after hot stamping or roller printing, an anti-counterfeiting film is pressed onto it using a hot stamping machine. When the surface of the hot stamping or roller printing ink is glossy, after pressing the anti-counterfeiting film, raised matte character marks appear on the carbon ribbon or roller printing ink surface of the license plate's reflective film, while the surrounding carbon ribbon or roller printing ink surface remains glossy. This design is difficult to counterfeit, has ideal overall anti-counterfeiting performance, and is highly practical.

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram illustrating the manufacturing process of an embodiment of the present invention; Figure 2 This is a schematic diagram of the finished license plate structure with glossy and frosted surfaces according to an embodiment of the present invention; Figure 3 This is a partial structural diagram of an embodiment of the present invention; Figure 4 This is a partial top view of an embodiment of the present invention; In the picture: 1. Corona-treated PET film; 2. Characters; 3. Rubber roller; 4. Reflective film; 5. Take-up roller; 6. Unwrap roller; 7. Stamped and hot-stamped license plate; 8. Conveyor belt. Detailed Implementation

[0015] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] See Figures 1 to 4 This invention discloses a method for manufacturing stamped license plate characters with a combination of frosted and glossy effects, comprising the following steps: (1) The character 2 is gravure printed on the corona PET film 1. After drying, the character 2 has a raised structure and is attached to the corona PET film 1. (2) Cut the corona-treated PET film 1; (3) The side of the corona-electrode PET film 1 with the character 2 is in contact with the raised surface of the license plate that has been stamped or rolled. (4) Press the rubber roller 3 of the hot stamping machine, and after setting the speed, temperature and pressure, make the license plate and the character strip on the corona PET film 1 move forward synchronously. There are traces of frosted characters on the raised surface of the license plate. (5) Press the anti-counterfeiting film onto the reflective film 4 of the license plate after hot stamping or roller printing with ink using a hot stamping machine; (6) When the hot stamping or roller printing ink surface is glossy, after the anti-counterfeiting film is pressed, the prominent matte character traces appear on the carbon ribbon or roller printing ink surface of the reflective film 4, while the surrounding carbon ribbon or roller printing ink surface still presents a glossy surface.

[0017] Preferably, the thickness of the corona-electrode PET film 1 is 36 μm. Characters 2 are printed on the surface of the smooth corona-electrode PET film 1, and the characters 2 are dried using a drying device to ensure that the characters 2 are fixedly attached to the corona-electrode PET film 1.

[0018] Preferably, the gravure printing roller has a mesh count of 80-150 mesh, and the drying conditions are: 70-90℃: 2′30″-4′, 125-150℃: 2′30″-4′.

[0019] Preferably, the ink used in gravure printing consists of 100 parts of oil-based carboxyacrylate resin, 2-5 parts of amino curing agent cyanate, 5-10 parts of ethyl acetate, and 5-30 parts of glass powder, wherein the glass powder has a particle size of 5-15 micrometers; it is thoroughly mixed using a high-speed mixer at a stirring speed of 800-1000 rpm.

[0020] Preferably, the printed character 2 has a matte finish and stands out on the surface of the corona-treated PET film 1.

[0021] Preferably, the pressure of the hot stamping machine is adjusted according to the softness of the reflective film 4 and the hardness of the surface carbon ribbon and roller printing ink. The pressing pressure is 0.1-1MPa, the speed is 3-8m / min, and the heating temperature is 50-150℃.

[0022] As a preferred option, when making the anti-counterfeiting film, the characters are cut out, so that the other areas have a matte finish after ink is printed on; when laminating the reflective film 4 of the license plate, the cut-out areas are glossy, while the other areas are matte. That is, the characters are glossy, and the other areas are matte.

[0023] In practical applications, a corona-electrode PET film 1 is set below the rubber roller 3, a take-up roller 5 is set at one end of the rubber roller 3, and an unwind roller 6 is set at the other end of the rubber roller 3; a stamped and hot-stamped license plate 7 is set below the rubber roller 3, the stamped and hot-stamped license plate 7 is located below the corona-electrode PET film 1, and a conveyor belt 8 is set at the bottom of the stamped and hot-stamped license plate 7.

[0024] First, frosted characters are created on the corona-treated PET film. Then, on the surface of the license plate that has already been stamped and hot-stamped or roller-printed with ink, a pressing machine (composed of rubber rollers / unwinding / conveyor belt) transfers the frosted effect from the corona-treated PET film to the surface of the hot-stamping / roller-printed ink. This is a physical pressing process. Because the hot-stamping and reflective films are soft, while the characters on the corona-treated PET film contain microbeads and are hard, the surface is rough and matte. The rubber rollers also apply heat and pressure, pressing the surface of the hot-stamping / roller-printed ink to create a matte effect. After pressing, the surface of the corona-treated PET film still retains the rough characters, allowing for reuse. The specific production steps are as follows: First, characters are gravure-printed onto a corona-treated PET film. After drying, these characters form a raised structure and adhere to the film. The corona-treated PET film is then cut. The side of the cut film with the characters is brought into contact with the raised surface of the license plate, which has been stamped or roller-printed. The rubber roller of the hot stamping machine is pressed together, and after setting the speed, temperature, and pressure, the license plate and the character strip on the corona-treated PET film move forward synchronously. Parts of the raised surface of the license plate show traces of frosted characters. An anti-counterfeiting film is then pressed onto the reflective film surface of the license plate, which has been hot-stamped or roller-printed. When the surface of the hot-stamped or roller-printed ink is glossy, after pressing the anti-counterfeiting film, raised matte character traces appear on the carbon ribbon or roller-printed ink surface of the reflective film, while the surrounding carbon ribbon or roller-printed ink surface remains glossy. This process is easy to manufacture, difficult to counterfeit, and offers ideal overall anti-counterfeiting performance and good practicality.

[0025] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. For those skilled in the art, any non-essential improvements and adjustments made to the present invention without departing from the concept of the present invention should fall within the scope of protection of the present invention.

Claims

1. A method for manufacturing stamped license plate characters with a combination of frosted and glossy surface effects, characterized in that: Includes the following steps: (1) Print characters on a corona-treated PET film using gravure printing. After drying, the characters form a raised structure and are attached to the corona-treated PET film. (2) Cut the corona-treated PET film; (3) The side of the corona-treated PET film with characters is in contact with the raised side of the license plate that has been stamped or rolled. (4) Press the rubber roller of the hot stamping machine, set the speed, temperature and pressure, and make the license plate and the character strip on the corona PET film move forward synchronously. There are traces of frosted characters on the raised surface of the license plate. (5) Press the anti-counterfeiting film onto the reflective film surface of the license plate after hot stamping or roller printing with ink using a hot stamping machine; (6) When the hot stamping or roller printing ink surface is glossy, after the anti-counterfeiting film is pressed, the prominent matte character traces appear on the carbon ribbon or roller printing ink surface of the reflective film, while the surrounding carbon ribbon or roller printing ink surface still presents a glossy surface.

2. The manufacturing method of a stamped license plate hot stamping character surface combining frosted and glossy effects according to claim 1, characterized in that: The corona-electrode PET film has a thickness of 36μm. Characters are printed on the surface of the smooth corona-electrode PET film, and the characters are dried using a drying device to ensure that the characters are firmly attached to the corona-electrode PET film.

3. The manufacturing method of a stamped license plate hot stamping character surface combining frosted and glossy effects according to claim 2, characterized in that: The gravure printing rollers have a mesh count of 80-150. Drying conditions: 70-90℃: 2′30″-4′, 125-150℃: 2′30″-4′.

4. The manufacturing method of a stamped license plate hot stamping character surface combining frosted and glossy effects according to claim 3, characterized in that: The ink used in gravure printing consists of 100 parts of oil-based carboxyacrylate resin, 2-5 parts of amino curing agent cyanate, 5-10 parts of ethyl acetate, and 5-30 parts of glass powder, wherein the glass powder has a particle size of 5-15 micrometers; it is thoroughly mixed using a high-speed mixer at a stirring speed of 800-1000 rpm.

5. The manufacturing method of a stamped license plate hot stamping character surface combining frosted and glossy effects according to claim 4, characterized in that: The printed characters have a matte finish and stand out from the surface of the corona-treated PET film.

6. The manufacturing method of a stamped license plate hot stamping character surface combining frosted and glossy effects according to claim 5, characterized in that: Adjust the pressure of the hot stamping machine according to the softness of the reflective film and the hardness of the surface carbon ribbon and roller printing ink. The pressing pressure is 0.1-1MPa, the speed is 3-8m / min, and the heating temperature is 50-150℃.

7. The manufacturing method of a stamped license plate hot stamping character surface combining frosted and glossy effects according to claim 6, characterized in that: When making anti-counterfeiting film, the characters are cut out, and the other areas are printed with ink to have a matte finish; when laminating reflective film for license plates, the cut-out areas are glossy, while the other areas are matte.

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