A partially aluminum-plated multi-media anti-counterfeiting transfer film and its production equipment and preparation method

Abstract

The present invention discloses a partially aluminum-plated multi-media anti-counterfeiting transfer film and its production equipment and preparation method. The partially aluminum-plated multi-media anti-counterfeiting transfer film comprises a base film, a release information layer, a partial aluminum layer and a partial zinc sulfide layer, wherein the release information layer is covered on the base film, the partial aluminum layer and the partial zinc sulfide layer are arranged on the release information layer, and the partial zinc sulfide layer covers or does not cover the partial aluminum layer, so that the transfer film has a metallic luster and an anti-counterfeiting function. In addition, the present invention adopts a method of partially evaporating an aluminum layer and a zinc sulfide layer to avoid polluting the soil and the atmosphere, and has high working efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of partially aluminum-plated multi-media anti-counterfeiting transfer films, and in particular to a partially aluminum-plated multi-media anti-counterfeiting transfer film and a production device and a preparation method thereof. Background Art

[0002] Aluminum-plated transfer film is widely used in high-end packaging products such as soft packaging, tobacco and alcohol packaging, and pharmaceutical packaging because of its noble and gorgeous metallic luster. However, most of the aluminum-plated packaging materials currently use full-plate aluminum-plated packaging materials, and a very small number of partial aluminum-plated packaging materials are mainly achieved by washing the aluminum layer of some areas of the full-plate aluminum-plated materials through processes such as water-washed aluminum and saline-alkali solvent-washed aluminum, and retaining the aluminum layer of other areas to achieve the partial aluminum layer effect.

[0003] The water-washed aluminum process mainly reduces the adhesion of the aluminum layer on the transfer film by coating a layer of fluorine oil on the transfer film, then washes part of the aluminum layer with water, and finally achieves the effect of a partial aluminum layer remaining on the material. The fluorine oil used is relatively expensive. Fluorine oil decomposes non-toxicly in an environment of 280-350℃, but it produces toxic gases at relatively high temperatures. The fluorine ions produced are seriously destructive to the atmospheric ozone layer.

[0004] The saline-alkali aluminum washing process mainly achieves the effect of local aluminum layer through the chemical reaction of saline-alkali solvent on aluminum corrosion. The aluminum washing chemical reagents used for soaking contain toxic chemical solvents, which are prone to cross contamination during the water washing process and are inconvenient to use in food packaging. In addition, aluminum washing produces a large amount of wastewater, and the cost of wastewater treatment is high. In addition, the aluminum washing aqueous solution is strongly alkaline and has strong corrosiveness. It is also easy to pollute the soil and is toxic to crops on the soil.

[0005] Therefore, the existing aluminized packaging printing technology needs to be improved and enhanced. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a partially aluminum-plated multi-media anti-counterfeiting transfer film and its production equipment and preparation method, aiming to solve the problem of high pollution of the existing multi-media anti-counterfeiting transfer film.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A partially aluminum-plated multi-media anti-counterfeiting transfer film comprises a base film, a release information layer, a partial aluminum layer and a partial zinc sulfide layer, wherein the release information layer covers the base film, the partial aluminum layer and the partial zinc sulfide layer are arranged on the release information layer, and the partial zinc sulfide layer covers or does not cover the partial aluminum layer.

[0009] The partially aluminum-plated multi-media anti-counterfeiting transfer film further comprises a protective layer, and the protective layer covers the partial aluminum layer and the partial zinc sulfide layer.

[0010] A production device for producing a partially aluminum-plated multi-media anti-counterfeiting transfer film, comprising an unwinding device for providing a base film, a coating device for preparing a release coating on the base film, a laser molding device for producing a release information layer, a vapor deposition device for partially aluminum-plating and partially zinc sulfide-plating on the release information layer, and a winding device for winding the finished transfer film;

[0011] The evaporation device comprises a first evaporation chamber, a second evaporation chamber and a partition, wherein the first evaporation chamber is adjacent to the second evaporation chamber, and the partition is arranged between the first evaporation chamber and the second evaporation chamber. After the transfer film is partially evaporated with an aluminum layer on the release information layer in the first evaporation chamber, it passes through the partition and enters the second evaporation chamber, and a zinc sulfide layer is partially evaporated on the partial aluminum layer and / or the release information layer. The first evaporation chamber and the second evaporation chamber are cooled while evaporating, so that a partial aluminum layer and a partial zinc sulfide layer are respectively deposited on the transfer film.

[0012] In the production equipment for producing partially aluminum-plated multi-media anti-counterfeiting transfer film, the first evaporation chamber includes a first evaporation roller for partial aluminum plating, a first cooling device, an aluminum strip conveying device and an evaporation boat. The cooling part of the first cooling device is arc-shaped and is covered on the outside of the first evaporation roller. There is a gap between the first evaporation roller and the first evaporation roller for the transfer film to pass through. The aluminum strip conveying device and the evaporation boat are both arranged in the first evaporation roller.

[0013] In the production equipment for producing partially aluminum-plated multi-media anti-counterfeiting transfer film, a first scraper is arranged in the first evaporation roller, and the first scraper can rotate relative to the first evaporation roller to scrape off the aluminum layer on the inner wall of the first evaporation roller.

[0014] In the production equipment for producing partially aluminum-plated multi-media anti-counterfeiting transfer film, the second evaporation chamber includes a second evaporation roller for locally plating zinc sulfide, a second cooling device and an aluminum boat. The cooling part of the second cooling device is arc-shaped and is covered on the outside of the second evaporation roller. There is a gap between the second evaporation roller and the second evaporation roller for the transfer film to pass through. The aluminum boat is arranged in the second evaporation roller.

[0015] In the production equipment for producing partially aluminum-plated multi-media anti-counterfeiting transfer film, a second scraper is arranged in the second evaporation roller, and the second scraper can rotate relative to the second evaporation roller to scrape off the zinc sulfide layer on the inner wall of the second evaporation roller.

[0016] In the production equipment for producing partially aluminum-plated multi-media anti-counterfeiting transfer film, sealing baffles are arranged between the evaporation boat and the first evaporation roller, and between the aluminum boat and the second evaporation chamber, and the first scraper and the second scraper are arranged on the sealing baffles.

[0017] In the production equipment for making partially aluminum-plated multi-media anti-counterfeiting transfer film, the aluminum bar conveying device includes at least two aluminum bar conveying components, a switching component and a motor. The aluminum bar conveying component is connected to the switching component, and the switching component is coaxially connected to the motor.

[0018] A method for preparing a partially aluminum-plated multi-media anti-counterfeiting transfer film using the above production equipment comprises the following steps:

[0019] providing a base film;

[0020] Applying a release coating on the base film;

[0021] Pressing a laser pattern on the release coating to form a release information layer;

[0022] sequentially evaporating a local aluminum layer and a local zinc sulfide layer on the release information layer;

[0023] A protective layer is coated on the partial aluminum layer and / or the partial zinc sulfide layer to obtain the partial aluminum-plated multi-media anti-counterfeiting transfer film.

[0024] Compared with the prior art, the present invention provides a partially aluminum-plated multi-media anti-counterfeiting transfer film, a production device and a preparation method thereof. The partially aluminum-plated multi-media anti-counterfeiting transfer film includes a base film, a release information layer, a partial aluminum layer and a partial zinc sulfide layer. The release information layer is covered on the base film, and the partial aluminum layer and the partial zinc sulfide layer are arranged on the release information layer. The partial zinc sulfide layer covers or does not cover the partial aluminum layer, so that the transfer film has a metallic luster and an anti-counterfeiting function. In addition, the present invention adopts the method of partially evaporating an aluminum layer and a zinc sulfide layer to avoid polluting the soil and the atmosphere, and its working efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention provides a schematic diagram of the cross-sectional structure of a partially aluminum-plated multi-medium anti-counterfeiting transfer film.

[0026] Figure 2 This is a structural block diagram of the production equipment provided by the present invention for producing a partially aluminum-plated multi-medium anti-counterfeiting transfer film.

[0027] Figure 3 This is a schematic diagram of the structure of the evaporation device in the production equipment provided by the present invention.

[0028] Figure 4 This is a schematic diagram of the structure of the first evaporation chamber in the production equipment provided by the present invention.

[0029] Figure 5 This is a schematic structural diagram of the aluminum bar conveying device in the production equipment provided by the present invention.

[0030] Figure 6A flow chart of a method for preparing a partially aluminum-plated multi-medium anti-counterfeiting transfer film using the production equipment provided by the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] It should be noted that when a component is referred to as being "mounted on", "fixed on" or "disposed on" another component, it may be directly on the other component or there may be a central component at the same time. When a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time.

[0033] It should also be noted that the directional terms such as left, right, up, and down in the embodiments of the present invention are merely relative concepts or are based on the normal use status of the product and should not be considered as restrictive.

[0034] See also Figure 1 The partially aluminum-plated multi-media anti-counterfeiting transfer film A provided by the present invention comprises a base film 1, a release information layer 2, a partial aluminum layer 3 and a partial zinc sulfide layer 4, wherein the release information layer 2 is covered on the base film 1, the partial aluminum layer 3 and the partial zinc sulfide layer 4 are arranged on the release information layer 2, and the partial zinc sulfide layer 4 covers or does not cover the partial aluminum layer 3. The partial zinc sulfide layer 4 covering the partial aluminum layer 3 includes two situations: the partial zinc sulfide layer 4 completely covers the partial aluminum layer 3 and covers a part of the partial aluminum layer 3.

[0035] In this embodiment, the partial aluminum layer 3 can be distributed in some areas of the release information layer 2 to show the metal effect and improve the packaging quality. The partial zinc sulfide layer 4 can be distributed in other areas of the release information layer 2. The effect of the release information layer 2 is enhanced by the partial zinc sulfide layer plating, and the anti-counterfeiting function is increased. Of course, the partial zinc sulfide layer 4 covers all or part of the partial aluminum layer 3, which has the same anti-counterfeiting effect.

[0036] In an optional embodiment, the base film 1 may be made of OPP film (biaxially oriented polypropylene), PET film (Polyethylene terephthalate), PE film (Polyethylene), etc., which has the characteristics of high toughness and easy peeling. In this embodiment, the thickness of the base film 1 is 10 μm-20 μm.

[0037] In an optional embodiment, the thickness of the release information layer 2 is 30-70 nanometers, the thickness of the local aluminum layer 3 is 50-90 nanometers, and the thickness of the local zinc sulfide layer 4 is 40-80 nanometers.

[0038] Furthermore, the partially aluminum-plated multi-media anti-counterfeiting transfer film of the present invention further comprises a protective layer 5, which covers the partial aluminum layer 3 and the partial zinc sulfide layer 4, and is used to isolate the zinc sulfide layer from oxidation and yellowing due to contact with air, and has the characteristics of scratch resistance and wear resistance. When the partially aluminum-plated multi-media anti-counterfeiting transfer film is compounded with paper, a glue layer is applied on the protective layer 5, and after compounding with the paper, the base film 1 is peeled off to form a wrapping paper with only metallic luster.

[0039] The present invention also provides a production device for producing a partially aluminum-plated multi-medium anti-counterfeiting transfer film, such as Figure 2 As shown, the production equipment includes a reeling device 10 for providing a transfer film, a coating device 20 for preparing a release coating on a base film 1, a laser molding device 30 for making a release information layer 2, a vapor deposition device 40 for locally plating aluminum and locally plating zinc sulfide on the release information layer 2, and a winding device 50 for winding up the finished transfer film.

[0040] The unwinding device 10, coating device 20, laser molding device 30, evaporation device 40 and winding device 50 can be arranged in sequence, that is, after the unwinding device 10 provides the base film 1, it is successively subjected to the processes of coating a release layer, laser molding, partial aluminum plating, partial zinc sulfide plating, etc., and then wound up by the winding device 50. This method is conducive to improving work efficiency, but it occupies a large space, is not convenient for adjustment, and is not easy to control the quality.

[0041] Therefore, the coating device 20, the laser molding device 30, and the evaporation device 40 can be set separately, and each process includes supplying and winding. This method has good flexibility and is convenient for quality control.

[0042] Please also read Figure 3 and Figure 4 In a preferred embodiment of the present invention, the evaporation device 40 includes a first evaporation chamber 41, a second evaporation chamber 42 and a partition 43. The first evaporation chamber 41 is adjacent to the second evaporation chamber 42, and the partition 43 is disposed between the first evaporation chamber 41 and the second evaporation chamber 42 to prevent aluminum vapor from mixing with zinc sulfide vapor.

[0043] After the transfer film passes through the first evaporation chamber 41 to partially deposit an aluminum layer on the release information layer 2 , it passes through the partition 43 and enters the second evaporation chamber 42 to partially deposit a zinc sulfide layer on the partial aluminum layer 3 and / or the release information layer 2 .

[0044] In this embodiment, the first evaporation chamber 41 includes a first evaporation roller 411 for local aluminum plating, a first cooling device 412, an aluminum strip conveying device 413 and an evaporation boat 414. The cooling part of the first cooling device 412 is arc-shaped and is covered on the outside of the first evaporation roller 411. There is a gap between the first evaporation roller 411 for the transfer film to pass through. The aluminum strip conveying device 413 and the evaporation boat 414 are both arranged in the first evaporation roller 411.

[0045] The first cooling device 412 covers a part of the first evaporation roller 411, and there is an arc gap between them for the transfer film to pass through, which can well cool the aluminum vapor. The first cooling device 412 has a cold water circulation system to ensure that the transfer film is timely and accurate during evaporation.

[0046] In the present invention, the first evaporation chamber 41 and the second evaporation chamber 42 are cooled while evaporating, so that a local aluminum layer 3 and a local zinc sulfide layer 4 are respectively plated on the transfer film. By cooling while evaporating, the steam and zinc sulfide vapor are quickly adsorbed on the release information layer 2, and it is ensured that the base film 1 will not be deformed or even melted when encountering high temperature.

[0047] Furthermore, a first scraper 415 is provided in the first evaporation roller 411. The first scraper 415 can rotate relative to the first evaporation roller 411. When the first evaporation roller 411 rotates, the aluminum layer on the inner wall of the first evaporation roller 411 is scraped off, so that the aluminum vapor can be reused, which is beneficial to saving aluminum resources and can also prevent the first evaporation roller 411 from accumulating too much aluminum and affecting its work, thereby extending the service life of the first evaporation chamber 41 and reducing its maintenance cost.

[0048] In this embodiment, the cross section of the first cooling device 412 is crescent-shaped and matches the circular shape of the first evaporation roller 411, thereby ensuring uniform cooling of the transfer film. The first cooling device 412 has a plurality of cold water pipes 4121 on the side in contact with the first evaporation roller 411, through which cold water is passed and circulated to quickly cool the transfer film during evaporation.

[0049] In order to further improve the evaporation effect, sealing baffles 416 are provided on both sides of the evaporation boat 414 to seal the evaporation boat and the evaporation roller 411, so that the aluminum vapor and the zinc sulfide vapor are between the evaporation boat and the evaporation roller, thereby minimizing the waste of aluminum and zinc sulfide and making the evaporation layer more uniform.

[0050] In an optional embodiment, the width of the hollow part (evaporation part) of the evaporation roller is less than 40CM, so as to control the evaporation thickness and uniformity. The present invention can also control the evaporation thickness by controlling the speed of the transfer film conveying, and specifically can control the transfer film conveying speed to be 400-800M / Min. When the evaporation thickness needs to be thickened, the transfer film conveying speed is reduced, and when the evaporation thickness needs to be thinned, the transfer film conveying speed is increased.

[0051] The aluminum bar conveying device 413 includes at least two aluminum bar conveying components 4131 and a motor 4133, and the aluminum bar conveying components 4131 are connected to the motor 4133. The aluminum bar conveying components 4131 convey the aluminum bar to the first evaporation roller 411 for evaporation to generate aluminum vapor. In addition, a double aluminum bar conveying component 4131 is used, and first one motor is operated to operate a corresponding group of aluminum bar conveying components 4131. When the aluminum bar on the group of aluminum bar conveying components 4131 is evaporated, the other motor 4133 is switched to start working, so that the aluminum bar is conveyed uninterruptedly, ensuring that the feeding can work uninterruptedly, which is conducive to maintaining a consistent concentration of aluminum vapor.

[0052] Please also read Figure 5 The aluminum bar conveying assembly 4131 includes a conveying roller 41311 coaxially connected to the motor, and an aluminum plate 41312 for winding an aluminum bar (not shown in the figure) is provided on the conveying roller 41311. A conveying auxiliary frame 41313 is provided on one side of the conveying roller 41311, and a fixed frame 41310 is provided on the conveying auxiliary frame 41313. The fixed frame 41310 is provided with an aluminum guide roller 41314, an aluminum bar fixing piece 41315 and a spiral clamp 41316.

[0053] The middle part of the aluminum plate 41312 is used for winding the aluminum strip. Figure 6 The conveying roller 41311 at the upper part of the viewing angle rotates clockwise to unwind the aluminum strip, and the aluminum strip is assisted by the aluminum guide roller 41314 to be conveyed to the aluminum strip fixing part 41315 to prevent the aluminum strip from deviating, and the size of the spiral clamp 41316 is adjusted according to the width of the aluminum strip, so that the aluminum strip is conveyed to the evaporation boat 414 in a straight line, and the aluminum strip is evaporated by the high temperature in the evaporation boat 414. The present invention can control the number of rotations of the motor output shaft according to the length of the aluminum strip on the aluminum plate 41312, to determine whether the aluminum strip has been conveyed, and switch accordingly.

[0054] In an optional embodiment, the aluminum plate 41312 is fixed to the conveying roller 41311 by a first fixing lock 41317, and the fixing frame 41310 is fixed to the conveying auxiliary frame 41313 by a second fixing lock 41318. When the conveying roller 41311 rotates, the conveying auxiliary frame 41313 is in a stationary state.

[0055] In an optional embodiment, the sealing baffle is provided with a through hole for the aluminum strip to pass through, and the aluminum strip is unwound and transported to the evaporation boat through the through hole. In this embodiment, there are two through holes for the aluminum strips on two aluminum plates to pass through. When one aluminum plate is supplying aluminum, the aluminum strips on the other aluminum plate block the through holes. To maintain the sealing performance, the first scraper 415 can be provided in the evaporation boat, and can be specifically fixed on the sealing baffle 416.

[0056] Please continue reading Figure 3 and Figure 4 The first evaporation roller 411 includes an arc-shaped baffle 4111, a baffle turntable 4112 and a baffle fixing device 4113. The arc-shaped baffle 4111 includes multiple pieces, which are fixed on the baffle fixing device 4113 to form a roller shape, and a hollow area is fixed on the baffle to expose the moving film of aluminum vapor for evaporation. The baffle turntable 4112 is set at one end of the arc-shaped baffle 4111, and a transmission shaft 4114 is installed on it. The transmission shaft 4114 extends through and extends to the other end of the first evaporation roller 411 to facilitate the rotation of the first evaporation roller and make the pattern evaporated on the moving film continuous.

[0057] The other end of the first evaporation roller 411 is an open end, and the first scraper and the aluminum strip conveying assembly extend into the first evaporation roller 411 from the open end. The first scraper can be fixed by a mechanical wall on the outside of the first evaporation roller 411, and the aluminum layer on the inner wall of the first evaporation roller 411 is scraped off when the first evaporation roller 411 rotates.

[0058] The sealing baffle is L-shaped, and the evaporation boat is tightly matched with the bottom of the sealing baffle to seal it. The evaporation boat can be driven by a servo motor to move so that the evaporation boat is separated from the sealing baffle, or taken out from the first evaporation roller 411.

[0059] In order to better understand the present invention, the manufacturing method and structure of the first evaporation roller 411 are described in detail below:

[0060] Plate selection: The material selected is high temperature resistant alloy steel plate with a thickness of 0.5mm-2mm. The selection of the plate is not limited to alloy steel, but can also be other high temperature resistant plates. Three plates are selected in this implementation.

[0061] Typesetting programming: select high-temperature resistant alloy steel plates of corresponding sizes according to the spacing between the fixings of the baffle fixing device 4113 and the width of the fixings themselves, and use typesetting programming software. According to the bite length required by the fixings, the front and rear bite lengths of the plates are designed to be 10mm-20mm. According to the size of the laser molded layout, "cross" point lines are designed at the four diagonal corners of the layout. According to the graphic design, the required points, surfaces, and patterns are made in the layout. In the subsequent cutting process, due to the connection requirements of the graphics, 0.3mm-1mm connection points can be set at the connection between the graphics and texts.

[0062] Laser cutting of alloy steel plates: The prepared typesetting files are transferred and converted into CNC numerical control programs to cut the plate cutting range pattern into a patterned alloy steel baffle. According to the material of high-temperature resistant alloy steel and the thickness of 0.5mm-2mm, the laser cutting process parameters are set as follows: laser focal length 0.05inch-0.25inch, distance point position -0.5mm-5.2mm, laser power 2-4kw, cutting speed 2-7m / min, auxiliary gas nitrogen pressure 6-15bar, nozzle height 0.4~1.0mm to cut the pattern.

[0063] Flushing and grinding of the baffle: Use a file or grinder to grind away the burrs that may appear on the cut surface of the alloy steel baffle, and then use a high-pressure water gun to rinse the few residues on the baffle.

[0064] Pressing of arc surface of baffle: Pressing of arc surface baffle is carried out according to the diameter of baffle turntable 4112 of the device to produce an alloy steel baffle with arc surface having a pattern.

[0065] The first evaporation roller 411 is assembled by interlocking and splicing three plates and fixing them on the fixing parts, and installing the baffle turntable 4112 and the transmission shaft 4114 at both ends to form the first evaporation roller 411.

[0066] The first evaporation roller 411 is a hollow structure, so that the evaporation boat 414, the first scraper 415, and the aluminum strip conveying assembly 4131 are placed inside it. The crescent-shaped first cooling device 412 ensures that the transfer film has sufficient time to contact with the aluminum vapor during high-speed production, thereby improving production efficiency.

[0067] In order to avoid the transfer film from shifting during evaporation, the input and output sides of the first evaporation roller 411 are provided with correction electric eyes 44. Dual electric eyes are used to identify the edge position deviation information of the molded working plate. The correction processor performs logical operations on the deviation information and drives the motor 4133 to adjust the left and right positions of the winding and unwinding to correct the linear motion of the transfer film.

[0068] Correspondingly, the second evaporation chamber 42 includes a second evaporation roller 421 for local zinc sulfide plating, a second cooling device 422 and an aluminum boat 423. The cooling part of the second cooling device 422 is arc-shaped and is covered on the outside of the second evaporation roller 421. There is a gap between the second evaporation roller 421 for the transfer film to pass through. The aluminum boat 423 is arranged in the second evaporation roller 421.

[0069] Similarly, the second evaporation roller 421 is provided with a second scraper 424, which can rotate relative to the second evaporation roller 421 to scrape off the zinc sulfide coating on the inner wall of the second evaporation roller 421. The cross section of the second cooling device 422 is also crescent-shaped, which is adapted to the circular shape of the second evaporation roller 421.

[0070] A sealing baffle 416 is also provided between the aluminum boat and the second evaporation chamber so that the zinc sulfide vapor is only in the space between the aluminum plate and the second evaporation chamber. A second scraper is provided on the sealing baffle to scrape off the cooled zinc sulfide.

[0071] There are two aluminum boats. When the zinc sulfide in one aluminum boat is completely evaporated, the servo motor can also be used to drive the aluminum boat to move for rapid switching.

[0072] Furthermore, the evaporation device 40 includes an unwinding roller 101, a first guide roller 102, a first compensation roller 103, a second guide roller 104, a third guide roller 105, a second compensation roller 106, a fourth guide roller 107 and a winding roller 108, which are arranged in sequence. The first guide roller 102 is arranged below the unwinding roller 101 and is located on one side of the first cooling device 412. The first compensation roller 103 is arranged on the other side of the first cooling device 412. The second guide roller 104 is arranged between the first compensation roller 103 and the partition 43. The third guide roller 105 is arranged opposite to the second guide roller 104 with the partition 43 separated, and is located on one side of the second cooling device 422. The second compensation roller 106 is arranged on the other side of the second cooling device 422. The fourth guide roller 107 is arranged between the second compensation roller 106 and the winding roller 108. The tension of the transfer film is ensured to be stable before and after evaporation by compensating the unwinding and winding position, speed, guide, and film feeding speed of each roller.

[0073] A tension sensor is also provided on the compensation roller. When the tension value of the sensor fluctuates, the floating information is fed back to the tension control system to adjust the up and down movement of the compensation roller to achieve the purpose of stabilizing the tension of the transfer film.

[0074] In an optional embodiment, the height of the transfer film conveyed by the unwinding roller 101 and the winding roller 108 is lower than the height of the evaporation point of the evaporation roller, and the rotation speeds of the first evaporation roller 411, the second evaporation roller 421, the unwinding roller 101, and the winding roller 108 are the same, so that the transfer film and the first evaporation roller 411 and the second evaporation roller 421 move relatively still, so that the friction between the transfer film and the cooling device is reduced as much as possible, and the transfer film is prevented from being scratched during transportation, thereby greatly improving product quality.

[0075] In the production equipment of the present invention, the evaporation device 40 may also include a monitoring PC device, a PLC controller and a remote communication system. The monitoring PC device is provided with an inoperable screen and a touch operable screen, and the inoperable screen is used to monitor the production parameters and the visualization of the electric eye image information in real time. The touch operable screen can adjust the production parameters by manual control. A remote communication port is provided on the PC device, and it can be connected to an external network or a local area network through the port to realize remote monitoring and feedback of production information. Among them, the PLC controller includes an information module (SM) and a functional module (FM), a CPU processing, and an alarm device. The main function of the information module is the input and output of signals and the input and output of digital signals. The main function of the functional module is to receive feedback control information to adjust the action of the drive-related equipment.

[0076] Furthermore, the evaporation device 40 may also include a digital vacuum measuring instrument to monitor the vacuum degree of the evaporation device 40 to ensure that the vacuum chamber remains stable during the production process. When the vacuum drops to a set value, the PLC controller receives a signal and sends an instruction to control the frequency converter to start the vacuum pump to meet the vacuum pressure in production after a logical operation.

[0077] A tension detection roller is set during the movement of the transfer film to keep the tension within the allowable range during the evaporation process. When the tension exceeds the limit, the PLC controller sends a command to control the compensation roller to float and control the tension of the transfer film.

[0078] A cooling device thermometer is arranged on the half-moon-shaped cooling device to monitor the temperature stability of the cooling device. A cooling water thermometer and a cooling water flow meter are arranged in the cooling device to keep the temperature of the cooling device within the set temperature range.

[0079] More preferably, after the vacuum aluminum plating and zinc sulfide plating processes, a thickness measuring instrument is also provided to detect the thickness of the transfer film after evaporation. When it exceeds the range, the aluminum feed servo motor 4133 or the zinc sulfide evaporation temperature is controlled according to the PLC controller to control the medium concentration in the vacuum to adjust the evaporation thickness of the medium.

[0080] The above detection equipment detects information to complete the automation of the entire device, realize digital and visual operation, and ensure product quality.

[0081] Based on the above-mentioned partially aluminum-plated multi-media anti-counterfeiting transfer film and production equipment, the present invention also provides a method for preparing the partially aluminum-plated multi-media anti-counterfeiting transfer film using the above-mentioned production equipment, such as Figure 6 As shown, it includes:

[0082] S10, providing a base film;

[0083] S20, applying a release coating on the base film;

[0084] S30, pressing a laser pattern on the release coating to form a release information layer;

[0085] S40, sequentially evaporating a local aluminum layer and a local zinc sulfide layer on the release information layer;

[0086] S50, coating a protective layer on the partial aluminum layer and / or the partial zinc sulfide layer to obtain the partial aluminum-plated multi-medium anti-counterfeiting transfer film.

[0087] When applying the release coating, the ambient temperature and humidity are controlled at about 60%, the temperature is controlled at 25 degrees Celsius, and a 150-mesh ceramic roller that is less affected by temperature is used. During coating, the base film moves at a speed of 160m / min, and the coating amount of the release information layer is controlled to be 1.3g / m2.

[0088] In this embodiment, the release information layer mainly includes 25-35 parts of cellulose resin, 20-30 parts of acrylic resin, 20-25 parts of ethyl ester, 20-25 parts of butanone, 1-5 parts of microcrystalline wax, etc. by weight.

[0089] In some specific implementations, the release information layer mainly comprises 30 parts of cellulose resin, 24 parts of acrylic resin, 22 parts of ethyl ester, 22 parts of butanone, 2 parts of microcrystalline wax and the like.

[0090] In addition, during the coating process, front and rear dual electric eyes are used to identify the edge position deviation information of the transfer film. The correction processor performs logical operations on the deviation information, drives the motor to adjust the left and right positions of the reel and unreel, and corrects the linear deviation and S-shaped deviation of the transfer film in the straight process.

[0091] When performing laser molding, the average running speed of the transfer film is set to 90m / min, the temperature of the laser molding working plate roller is heated to 170 degrees Celsius, the rubber roller hardness is selected to be 95HS, and the rubber roller pressure is adjusted to 30KG / cm2 by driving the rubber roller motor.

[0092] In addition, an electric eye and an electrically controlled mechanical positioning system are installed on the laser molding device, and the winding and unwinding tension range is set to 5-30KG. During production, the actual plate spacing of the laser material is detected by the electric eye, and the correction processor calculates the difference with the circumference of the molding working plate. The processor sends a control signal to automatically adjust the tension of the winding and unwinding system to keep the laser molding plate spacing consistent with the actual printing plate circumference, complete the perfect splicing of the laser graphics at the same position, and realize positioning laser molding.

[0093] At the same time, the electric eye detects the position deviation information of the left and right edges of the molded working plate. The correction processor performs logical operations on the deviation information, sends out control information, and controls the drive motor to adjust the correction device to produce displacement to correct the S-shaped deviation in the linear motion during the production process of the base film.

[0094] In order to improve the adhesion of the evaporation, after step S30 and before step S40, the following steps are further included:

[0095] S301, performing corona treatment on the release information layer. Specifically, the corona power is 2-5 W. In the embodiment of the present invention, the corona power is preferably set at 3 W, so as to ensure that the surface adhesion of the release information layer reaches a specified value without breaking through the cover release information layer.

[0096] Furthermore, when evaporating a local aluminum layer, the transfer film is passed through the gap between the first evaporation roller and the first cooling device, and the working chamber is evacuated by the vacuum exhaust system. -2 -10 -3 Under the vacuum condition of Pa, the transfer film will not be deformed due to excessive temperature when cooled by an anilox roller (i.e., the first cooling device) at a temperature of -10°C-0°C, and the reeling and unreeling speed of the transfer film is adjusted to be consistent with the speed of the baffle turntable.

[0097] Since the first evaporation roller is a hollow structure with a built-in evaporation boat and aluminum strip conveying bearing, high-frequency induction heating is used to heat the 99.9% purity aluminum strip to above 1400 degrees Celsius. The metallic aluminum vaporizes and evaporates and rises. The aluminum vapor reaches the transfer film surface through the baffle cutting surface and immediately cools and precipitates. The transfer film without cutting patterns remains transparent due to the obstruction of the baffle, achieving the effect of local aluminum-plated transfer film.

[0098] In this embodiment, the thickness of the evaporated aluminum layer is 55-65 nanometers. In order to improve production efficiency and ensure the thickness of the aluminum coating layer, the cooling device is set to a crescent shape to ensure that the transfer film has sufficient time to contact with the aluminum vapor during high-speed production, thereby improving production efficiency. The transfer film conveying speed can reach 400m / min.

[0099] Similarly, in order to avoid left and right or S-shaped deviation during the transfer film conveying process, front and rear double electric eyes are set to locate the "cross" point position line position deviation information of the transfer film. The correction processor performs logical operations on the deviation information, drives the motor to adjust the left and right positions of the rewinding and unwinding, and corrects the linear motion of the transfer film.

[0100] Furthermore, in order to avoid the enlargement or blurring of the local aluminum-plated pattern due to inconsistent speeds between the reeling and unwinding device and the baffle turntable, speed monitoring equipment is installed at the reeling and unwinding device and the baffle turntable to monitor their speeds in real time to keep them consistent, and a pattern monitoring electric eye is installed behind the baffle turntable. When the pattern increases abnormally, the information of the increase position difference is captured, and the information is fed back to the CNC mechanical device through processor logic operations to adjust the speed of the reeling and unwinding device and the baffle turntable in real time to make them consistent.

[0101] In order to prevent the aluminum layer from gathering on the baffle and affecting the aluminum plating effect, an oily coating is applied on the inside of the baffle. The oily coating can be fluorine oil to reduce the adhesion to the baffle, and it is connected to the evaporation boat through the first scraper to prevent the aluminum layer from gathering. The aluminum layer scraped off by the first scraper returns to the evaporation boat along the direction of the scraper for reuse, which greatly improves the utilization rate of metal aluminum.

[0102] Furthermore, when the zinc sulfide layer is locally formed, a partition is used to isolate the first evaporation chamber from the second evaporation chamber to avoid mutual contamination.

[0103] When the zinc sulfide layer is evaporated, the working chamber needs to be evacuated by the vacuum exhaust system, so that the transfer film passes through the gap between the second evaporation roller and the second cooling device, and the working chamber needs to be evacuated by the vacuum exhaust system. -2 -10 - 3 Under the vacuum condition of 1.5 Pa, high-frequency induction heating is used to heat 99.9% pure zinc sulfide powder (or zinc sulfide cre) to above 1000 degrees Celsius. The zinc sulfide vaporizes and evaporates and rises. The baffle of the working chamber is removed to allow the zinc sulfide vapor to transfer the film liner to form a zinc sulfide layer at a lower temperature. The thickness of the evaporated zinc sulfide layer is 55-65 nanometers.

[0104] At the same time, the transfer film will not be deformed due to excessive temperature by cooling the anilox roller at a temperature of -10°C to 0°C. Of course, this coating is not limited to zinc sulfide, but can also be other transparent media such as silicon oxide. The present invention uses one coating, one laser molding, and two or more media evaporation, which not only makes the transfer film have a metallic texture but also has an anti-counterfeiting function.

[0105] Furthermore, when applying the protective layer, a 280-mesh ceramic roller can be used to apply the varnish protective layer. The wet coating amount is 3-8 g / cm 2 , and add alcohol during coating to control the leveling of the varnish. The protective layer can protect the zinc sulfide layer from oxidation and yellowing when in contact with air, and it is scratch-resistant and wear-resistant.

[0106] In summary, the present invention makes the transfer film have a metallic luster and an anti-counterfeiting function by coating a release layer, performing laser molding, and then locally plating aluminum and zinc sulfide. In addition, the present invention adopts a method of locally evaporating an aluminum layer and a zinc sulfide layer to avoid polluting the soil and the atmosphere. It has high working efficiency and is a great improvement over the prior art.

[0107] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the claims attached to the present invention.

Claims

1. A production device for producing a partially aluminum-plated multi-media anti-counterfeiting transfer film, characterized in that: It includes an unwinding device for providing a base film, a coating device for preparing a release coating on the base film, a laser molding device for making a release information layer, a vapor deposition device for partially plating aluminum and partially plating zinc sulfide on the release information layer, and a winding device for winding the finished transfer film; The evaporation device comprises a first evaporation chamber, a second evaporation chamber and a partition, wherein the first evaporation chamber is adjacent to the second evaporation chamber, and the partition is arranged between the first evaporation chamber and the second evaporation chamber. After the transfer film is partially evaporated on the release information layer by the first evaporation chamber, the transfer film passes through the partition and enters the second evaporation chamber, and a zinc sulfide layer is partially evaporated on the partial aluminum layer and / or the release information layer. The first evaporation chamber and the second evaporation chamber are cooled while evaporating, so that a partial aluminum layer and a partial zinc sulfide layer are respectively deposited on the transfer film. The first evaporation chamber includes a first evaporation roller for local aluminum plating, a first cooling device, an aluminum strip conveying device and an evaporation boat. The cooling part of the first cooling device is arc-shaped and is covered on the outside of the first evaporation roller. There is a gap between the first evaporation roller and the first evaporation roller for the transfer film to pass through. The aluminum strip conveying device and the evaporation boat are both arranged in the first evaporation roller. There are a plurality of cold water pipes on the side of the first cooling device that contacts the first evaporation roller.

2. The production equipment for producing partially aluminum-plated multi-medium anti-counterfeiting transfer film according to claim 1, characterized in that: The first evaporation roller is provided with a first scraper, and the first scraper can rotate relative to the first evaporation roller to scrape off the aluminum layer on the inner wall of the first evaporation roller.

3. The production equipment for producing partially aluminum-plated multi-medium anti-counterfeiting transfer film according to claim 2, characterized in that: The second evaporation chamber includes a second evaporation roller for local zinc sulfide plating, a second cooling device and an aluminum boat. The cooling part of the second cooling device is arc-shaped and is covered on the outside of the second evaporation roller. There is a gap between the second evaporation roller and the second evaporation roller for the transfer film to pass through. The aluminum boat is arranged in the second evaporation roller.

4. The production equipment for producing partially aluminum-plated multi-medium anti-counterfeiting transfer film according to claim 3, characterized in that: The second evaporation roller is provided with a second scraper, and the second scraper can rotate relative to the second evaporation roller to scrape off the zinc sulfide coating on the inner wall of the second evaporation roller.

5. The production equipment for producing partially aluminum-plated multi-medium anti-counterfeiting transfer film according to claim 4, characterized in that: A sealing baffle is provided between the evaporation boat and the first evaporation roller, and between the aluminum boat and the second evaporation chamber, and the first scraper and the second scraper are provided on the sealing baffle.

6. The production equipment for producing partially aluminum-plated multi-medium anti-counterfeiting transfer film according to claim 1, characterized in that: The aluminum bar conveying device comprises at least two aluminum bar conveying components, a switching component and a motor. The aluminum bar conveying component is connected to the switching component, and the switching component is coaxially connected to the motor.

7. A method for preparing a partially aluminum-plated multi-medium anti-counterfeiting transfer film using the production equipment according to any one of claims 1 to 6, characterized in that: Includes steps: providing a base film; Applying a release coating on the base film; Pressing a laser pattern on the release coating to form a release information layer; sequentially evaporating a local aluminum layer and a local zinc sulfide layer on the release information layer; A protective layer is coated on the partial aluminum layer and / or the partial zinc sulfide layer to obtain the partial aluminum-plated multi-media anti-counterfeiting transfer film.

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