Laser transfer anti-counterfeiting film, laser transfer anti-counterfeiting paper and production equipment

Abstract

The present application relates to the field of laser film, and specifically discloses a laser transfer anti-counterfeiting film, laser transfer anti-counterfeiting paper and production equipment, which includes a coating roller; a plurality of pressure rollers, with a plurality of pressing gaps formed between the plurality of pressure rollers; a material receiving device, used to form a scraper abutting against the coating roller and a collecting member for receiving UV varnish overflowing from the pressing gap; a feeding device, used to feed the UV varnish to the pressure roller away from the coating roller; a laser transfer member, used to perform a laser transfer operation on the base film passing through the coating roller; and a curing device, used to perform a UV curing operation on the base film after laser transfer. The present application has the function of squeezing out the air in the UV varnish, and the squeezing can also play a role in stirring the UV varnish. The pressure roller can transport the UV varnish, realizing squeezing during the transport process, saving processes, and ensuring the thickness of the UV varnish coated on the base film, which can have a better visual effect during laser transfer.

Description

Technical Field

[0001] The present application relates to the field of laser films, and in particular to a laser transfer anti-counterfeiting film, laser transfer anti-counterfeiting paper and production equipment. Background Art

[0002] Laser transfer anti-counterfeiting film is a kind of packaging decoration material prepared by laser transfer printing using laser holographic technology. The graphics and texts produced by laser holographic technology have a unique bright, dazzling, color-changing, and colorful special effect, which can be said to be unattainable and irreplaceable by any other technology in the world. Therefore, the combination of laser packaging decoration materials and color printing not only has excellent color perception, but also can be used for anti-counterfeiting through special patterns.

[0003] In the related art, UV varnish is mainly applied on the base film, and then the base film coated with the varnish is sequentially laser transferred and light cured. However, the step of applying varnish is to use the oil storage tank to directly contact the coating roller 1, so that the UV varnish in the oil storage tank 9 contacts the coating roller, and then an opening is opened between the oil storage tank 9 and the coating roller 1, so that the UV varnish can be taken out of the oil storage tank 9 as the coating roller 1 rotates, so as to be applied on the base film (refer to the accompanying drawings). Fig.17 ).

[0004] With respect to the above-mentioned related technologies, the inventor believes that there are the following defects:

[0005] The UV varnish is placed directly in the oil storage tank and is directly brought out of the oil storage tank as the coating roller rotates, which can easily lead to the presence of some air in the UV varnish, and the air cannot be discharged outward. Then, after the UV varnish is coated on the base film, the UV varnish may have an uneven surface, poor laser transfer, or abnormal color of the pattern after laser transfer. Summary of the invention

[0006] In order to improve the problem of poor transfer effect after laser transfer, the present application provides a laser transfer anti-counterfeiting film, laser transfer anti-counterfeiting paper and production equipment.

[0007] The present application provides a laser transfer anti-counterfeiting film, laser transfer anti-counterfeiting paper and production equipment adopting the following technical solutions:

[0008] A production device for laser transfer anti-counterfeiting film, comprising a coating roller, which contacts a base film used for laser transfer and coats UV varnish on the base film; a plurality of pressing rollers, wherein a plurality of pressing rollers form a plurality of pressing gaps; the plurality of pressing rollers are used to form a conveying area for conveying the UV varnish to the coating roller; a driving member provides power to rotate the plurality of pressing rollers; a material receiving device, which is used to form a scraper abutting the coating roller and a collecting member for receiving the UV varnish overflowing from the pressing gap; a feeding device, which is used to feed the UV varnish to the pressing roller away from the coating roller; a laser transfer member, which is used to perform a laser transfer operation on the base film passing through the coating roller; and a curing device, which is used to perform a UV curing operation on the base film after laser transfer.

[0009] By adopting the above technical scheme, since the viscosity of UV varnish is relatively high, UV varnish is easy to adhere to the pressing roller, and the thickness of UV varnish adhered to the pressing roller is relatively large. Through the gap between the two pressing rollers, part of the UV varnish can pass directly, while the other part of the UV varnish is difficult to pass directly, thereby squeezing the UV varnish passing through the pressing gap. Through the pressing gap between multiple pressing rollers, the UV varnish can be squeezed multiple times to better squeeze out the air in the UV varnish. The pressing gap between multiple pressing rollers can squeeze the UV varnish, so that when one pressing roller contacts another pressing roller, the pressing roller with UV varnish adhered to it can transfer the UV varnish to the other pressing roller, thereby realizing the transfer of UV varnish, so that UV varnish adheres to multiple pressing rollers. After a period of time, the UV varnish on multiple pressing rollers will have a better uniform texture and no air distributed on the pressing rollers. Then the pressure roller abutting against the coating roller will deliver the UV varnish directly to the coating roller. Since the UV varnish on the pressure roller is uniform and air-free, it can be better delivered to the coating roller. The UV varnish on the coating roller is also uniform and air-free, so when the coating roller coats the base film with UV varnish, the coating quality and coating thickness can be better controlled.

[0010] The scraper of the receiving device is in contact with the coating roller. When there is some UV varnish residue on the coating roller after the coating roller has coated the base film, the scraper will scrape off the excess UV varnish on the coating roller. Then, when the pressure roller transfers the UV varnish to the coating roller, the coating roller will receive the UV varnish from the pressure roller with a clean and smooth surface every time, thereby ensuring the amount of UV varnish received by the coating roller. When the coating roller is in contact with the base film for coating, the UV varnish on the coating roller is also flat, thereby better coating the base film with UV varnish, that is, better controlling the coating quality and coating thickness. The receiving and feeding parts are for collecting UV varnish to avoid waste.

[0011] In summary, by better controlling the coating quality and coating thickness of UV varnish, the quality of laser transfer can be improved, thereby greatly improving the quality of the produced laser film.

[0012] Optionally, the vertical distances between the axes of the plurality of pressure rollers and the axis of the coating roller decrease in sequence from a direction away from the coating roller to a direction close to the coating roller.

[0013] By adopting the above technical solution, the plurality of pressure rollers are extended obliquely downward, so that the UV varnish can be better transported toward the coating roller by virtue of gravity.

[0014] Optionally, the sizes of the plurality of nip gaps decrease in sequence from a direction away from the coating roller to a direction close to the coating roller.

[0015] By adopting the above technical scheme, the gaps between multiple pressing rollers are different, and the closer the pressing gap is to the coating roller, the smaller it is, so that the force for squeezing the UV varnish can be increasingly greater, thereby slowly squeezing the UV varnish in a gentle manner, that is, slowly thinning the thickness of the thick UV varnish adhering to the pressing roller, and squeezing it during each thinning process, so that the amount squeezed each time is small, thereby avoiding very obvious splashing of the UV varnish, which makes it easy for air to mix into the UV varnish, thereby not only achieving multiple squeezing of the UV varnish, but also achieving the step-by-step control of the squeezing amount to obtain the required thickness of the UV varnish attached to the coating roller, and better ensuring the effect of squeezing the air in the UV varnish outward, and better ensuring the quality and thickness of the UV varnish coated on the base film.

[0016] Optionally, the plurality of pressure rollers are located above the coating roller; the collecting member is located above the base film; the plurality of pressure rollers have the same rotation direction, and the coating roller and the pressure roller have the same rotation direction.

[0017] By adopting the above technical solution, the rotation directions of multiple pressing rollers are the same, so that the UV varnish in the pressing gap can be better adhered to another pressing roller, which is beneficial to improving the effect of UV varnish transfer between multiple pressing rollers.

[0018] Optionally, the production equipment also includes: a displacement control device and a gantry; the gantry is used to install the displacement control device, the material receiving device, the feeding device, the pressure roller and the coating roller; the displacement control device is used to directly or indirectly drive the movement of multiple pressure rollers so that the sizes of multiple pressure gaps are uniformly or non-uniformly increased or decreased.

[0019] By adopting the above technical solution, the size of the pressing gap between multiple pressing rollers can be adjusted, so the thickness of the UV varnish attached to the coating roller can be adjusted, and the thickness of the UV varnish coated on the base film can be changed according to the needs of laser transfer.

[0020] Optionally, the production equipment also includes: a preheating device and a temperature control device; the preheating device directly or indirectly heats the UV varnish to a preset temperature; the temperature control device is used to make the preheating device form a plurality of heating areas with different temperatures; the temperatures of the plurality of heating areas increase sequentially from a direction away from the coating roller to a direction close to the coating roller.

[0021] By adopting the above technical scheme, the preheating device and the temperature control device cooperate to form a plurality of heating areas with different temperatures, so that the temperatures of the plurality of heating areas are increased in sequence from the direction away from the coating roller to the direction close to the coating roller, so that the UV varnish is heated up in the process of squeezing out air and conveying, and the UV varnish is heated up slowly. On the one hand, it can be heated up at a heating temperature close to the temperature of the UV varnish itself, thereby avoiding energy waste caused by excessive heating temperature. In addition, during the heating process of the UV varnish, the temperature difference between the temperature of the UV varnish itself and the heating temperature is small, thereby avoiding the UV varnish from becoming slightly viscous too early due to the high temperature, affecting the conveying of the UV varnish by multiple pressure rollers, and better ensuring the thickness of the UV varnish attached to the coating roller.

[0022] Optionally, the preheating device includes: a heating box, a conduit and a pump body component; the temperature control device includes: a temperature sensor arranged in the heating box and a control component arranged on the conduit; the pump body component is used to add a heat exchange medium into the heating box; a heating element for heating the heat exchange medium is arranged in the heating box; a containing chamber, an inlet and an outlet are formed on the pressure roller; the temperature sensor is arranged in the heating box, the conduit is rotatably connected to the pressure roller, and the conduit is used to connect the containing chamber with the heating box; the temperature sensor is used to detect the temperature of the heat exchange medium in the heating box, and the control component is used to control the opening and closing of the conduit.

[0023] By adopting the above technical solution, the heat exchange medium is heated, and then the heat exchange medium is introduced into the pressure roller, thereby achieving heating of the pressure roller. The pressure roller itself is in contact with the UV varnish, thereby achieving direct heating of the UV varnish through the pressure roller, better heating the UV varnish, and reducing heat loss.

[0024] Optionally, a high heating area and a low heating area are formed in the accommodating chamber; the high heating area is located on the side of the pressure roller close to the coating roller, and the low heating area is located on the side of the pressure roller away from the coating roller.

[0025] A laser transfer anti-counterfeiting film comprises, from bottom to top, a base film, a UV varnish layer, a laser transfer layer and a protective layer; the UV varnish layer is coated on the base film by the production equipment of the laser transfer anti-counterfeiting film.

[0026] By adopting the above technical solution, it can be ensured that the UV varnish layer has a uniform thickness, uniform texture, and no air, thereby achieving a better visual experience.

[0027] A laser transfer anti-counterfeiting paper comprises: the above-mentioned laser transfer anti-counterfeiting film, base paper and an adhesive layer; the laser transfer anti-counterfeiting film is adhered to the base paper through the adhesive layer.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. Through the gap between the multiple rollers, the UV varnish can be squeezed to squeeze out the air in the UV varnish. At the same time, the extrusion can also stir the UV varnish. The rotation of the roller can transport the UV varnish, which can realize the extrusion during the transportation process, saving the process and ensuring the thickness of the UV varnish coated on the base film, so that it can have a better visual perception during laser transfer.

[0030] 2. Multiple pressure rollers extend downward obliquely, which can better transport the UV varnish toward the coating roller and transport the UV varnish to the coating roller;

[0031] 3. The scraper scrapes the coating roller to ensure that the UV varnish is scraped off cleanly every time the coating roller contacts the pressure roller. This ensures the thickness of the UV varnish delivered to the coating roller by the pressure roller each time, and better ensures the thickness of the UV varnish coated on the base film. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is an overall schematic diagram according to an embodiment of the present application;

[0033] Figure 2 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the gantry and some surrounding parts;

[0034] Figure 3 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the coating roller, the pressure roller and the driving member;

[0035] Figure 4 It is a structural schematic diagram of a part of the embodiment, mainly showing the structures of the collecting member and the scraping member;

[0036] Figure 5 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the driving member and the coating roller;

[0037] Figure 6 It is a structural diagram of a part of the embodiment, mainly showing Figure 5 A partial schematic diagram of

[0038] Figure 7 It is a structural schematic diagram of a part of the embodiment, mainly showing the pressure roller and the structure inside the pressure roller;

[0039] Figure 8 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the fixing box and some surrounding parts;

[0040] Fig. 9 It is a structural schematic diagram of a part of the embodiment, mainly showing the explosion structure of the fixing box and the first connecting plate;

[0041] Fig.10 It is a structural schematic diagram of a part of the embodiment, mainly showing the explosion structure of the fixing box and the second connecting plate;

[0042] Fig.11 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of an embodiment of a driving member;

[0043] Fig.12 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of another embodiment of the driving member;

[0044] Fig.13 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of an embodiment of a scraper;

[0045] Fig.14 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of another embodiment of the scraper;

[0046] Fig.15 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the heating box and the pressure roller;

[0047] Fig.16 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the heating box and the coating roller;

[0048] Fig.17 It is the structure of the oil storage tank and the coating roller in the background technology.

[0049] Reference numerals:

[0050] 1. Coating roller;

[0051] 2. Pressing roller;

[0052] 3. Collect the pieces;

[0053] 4. Cabinet; 41. Gantry;

[0054] 5. Driving member; 51. Power motor; 52. Motor bracket; 53. First gear; 54. Second gear; 55. Moving block; 56. Sliding block; 57. Linear guide rail;

[0055] 6. scraper; 61. rotating roller; 62. rotating driving member; 63. scraper;

[0056] 7. Displacement control device; 71. Electric push rod; 72. Adjustment plate; 73. Connecting frame; 74. Bolt; 75. Spring;

[0057] 8. Preheating device; 81. Heating box; 82. Conduit; 83. Reflux pipe; 84. Pump body component; 85. First connecting plate; 851. First through hole; 86. Second connecting plate; 861. Second through hole; 87. Fixing box; 871. Third through hole; 88. Connecting pipe. DETAILED DESCRIPTION

[0058] The following is combined with Figure 1-16 This application is described in further detail.

[0059] The embodiments of the present application disclose a laser transfer anti-counterfeiting film, a laser transfer anti-counterfeiting paper and a production device.

[0060] A production device for a laser transfer anti-counterfeiting film comprises a coating roller 1, a pressing roller 2, a material receiving device, a material feeding device, a laser transfer piece and a curing device.

[0061] The coating roller 1 contacts the base film for laser transfer and coats the UV varnish on the base film. A plurality of pressing rollers 2 are provided, and a plurality of pressing gaps are formed between the plurality of pressing rollers 2. The plurality of pressing rollers 2 are used to form a conveying area for conveying the UV varnish to the coating roller 1, and a driving member 5 is used to provide power to rotate the plurality of pressing rollers 2. Since the viscosity of UV varnish is relatively high, UV varnish is easy to adhere to the pressing roller 2, and the thickness of UV varnish adhered to the pressing roller 2 is relatively large. Through the gap between the two pressing rollers 2, part of the UV varnish can pass directly, while the other part of the UV varnish is difficult to pass directly, thereby squeezing the UV varnish passing through the pressing gap. Through the pressing gap between multiple pressing rollers 2, the UV varnish can be squeezed multiple times to better squeeze out the air in the UV varnish. The pressing gap between multiple pressing rollers 2 can squeeze the UV varnish, so that when one pressing roller 2 contacts with another pressing roller 2, the pressing roller 2 adhered with UV varnish can transfer the UV varnish to the other pressing roller 2, thereby realizing the transfer of UV varnish, so that UV varnish is adhered to multiple pressing rollers 2. After a period of time, the UV varnish on multiple pressing rollers 2 will be better distributed on the pressing roller 2 with uniform texture and no air.

[0062] The pressure roller 2 abutting against the coating roller 1 will directly deliver the UV varnish to the coating roller 1. Since the UV varnish on the pressure roller 2 is uniform and air-free, it can be better delivered to the coating roller 1. The UV varnish on the coating roller 1 is also uniform and air-free, so when the coating roller 1 coats the base film with UV varnish, the coating quality and coating thickness can be better controlled.

[0063] The receiving device is used to form a scraper 6 that contacts the coating roller 1 and a collecting member 3 for receiving the UV varnish overflowing from the press gap. The feeding device is used to feed the UV varnish to the pressing roller 2 far away from the coating roller 1. The laser transfer member is used to perform a laser transfer operation on the base film that passes through the coating roller 1. The curing device is used to perform a UV curing operation on the base film after laser transfer. The feeding device is a box body, and a plurality of oil outlet pipes are arranged on the box body to discharge the UV varnish to the pressing roller 2, and the UV varnish is discharged to the pressing roller 2 farthest from the coating roller 1.

[0064] In this embodiment, the laser transfer part and the curing device are both prior art. Among them, the curing device cures the UV varnish by irradiating ultraviolet rays on the UV varnish. The driving member 5 is a rotary drive motor, and the rotary drive motor is used to drive the pressure roller 2 to rotate. Specifically, in this embodiment, the production equipment of the laser transfer anti-counterfeiting film also includes: a supporting frame, the supporting frame is a cabinet 4 and a bracket, the cabinet 4 is in contact with the ground, the cabinet 4 is provided with cables, and the bracket is used to install the pressure roller 2, the driving member 5, the coating roller 1 and the material receiving device. Among them, the driving member 5 is also used to drive the coating roller 1 to rotate. To be precise, the driving member 5 is a plurality of rotary drive motors, and each rotary drive motor is used to drive a plurality of pressure rollers 2 and one of the coating rollers 1 to rotate.

[0065] In this embodiment, the scraper 6 is a plate, and the scraper 6 abuts against the coating roller 1. Then, during the rotation of the coating roller 1, the scraper 6 can scrape off the UV varnish on the coating roller 1. After the coating roller 1 coats the base film, when there is some UV varnish residue on the coating roller 1, the scraper 6 scrapes off the excess UV varnish on the coating roller 1. Then, when the pressure roller 2 transfers the UV varnish to the coating roller 1, the coating roller 1 receives the UV varnish from the pressure roller 2 with a clean and smooth surface each time, thereby ensuring the amount of UV varnish received by the coating roller 1, and when the coating roller 1 abuts against the base film for coating, the UV varnish on the coating roller 1 is also flat, thereby better coating the base film with UV varnish, that is, better controlling the coating quality and coating thickness.

[0066] Specifically, the vertical distance between the axis of the plurality of pressure rollers 2 and the axis of the coating roller 1 decreases from the direction away from the coating roller 1 to the direction close to the coating roller 1. The plurality of pressure rollers 2 extend downwardly at an angle, so that the UV varnish can be better transported toward the coating roller 1 by the effect of gravity.

[0067] Specifically, the sizes of the plurality of nip gaps decrease in sequence from the direction away from the coating roller 1 to the direction close to the coating roller 1. The gaps between the plurality of nip rollers 2 are different, and the nip gaps closer to the coating roller 1 are smaller, so that the force of squeezing the UV varnish can be increasingly greater, thereby slowly squeezing the UV varnish in a gentle manner, that is, slowly thinning the thick UV varnish adhering to the nip roller 2, and squeezing in each thinning process, so that the amount squeezed each time is small, avoiding very obvious splashing of the UV varnish and preventing air from being easily mixed into the UV varnish.

[0068] Specifically, the plurality of pressure rollers 2 are all located above the coating roller 1; the collecting member 3 is located above the base film; the plurality of pressure rollers 2 have the same rotation direction, and the coating roller 1 and the pressure roller 2 have the same rotation direction.

[0069] In some embodiments, the production equipment further includes: a displacement control device 7 and a gantry 41. The gantry 41 is used to install the displacement control device 7, the material receiving device, the material feeding device, the pressure roller 2 and the coating roller 1, and the gantry 41 is integrally formed with the bracket. The displacement control device 7 is used to directly or indirectly drive the multiple pressure rollers 2 to move, so that the size of multiple pressing gaps is uniformly or non-uniformly increased or decreased. In this embodiment, the displacement control device 7 is a cylinder and a connecting plate, and the number of cylinders and connecting plates is set to be multiple. The connecting plate is slidably connected to the gantry 41, and the connecting plate is used to install a rotary drive motor and a pressure roller 2. The pressure roller 2 is rotatably connected to the connecting plate. The cylinder is installed on the gantry 41, and the output end of the cylinder is fixed to the connecting plate. The cylinder drives the connecting plate to move, so that the connecting plate drives the pressure roller 2 to move, thereby realizing that the displacement control device 7 directly drives the multiple pressure rollers 2 to move, so that the pressure gaps between the multiple pressure rollers 2 become larger and smaller.

[0070] In some embodiments, the production equipment further includes: a preheating device 8 and a temperature control device; the preheating device 8 directly or indirectly heats the UV varnish to a preset temperature; the temperature control device is used to form a plurality of heating areas with different temperatures in the preheating device 8; the temperatures of the plurality of heating areas increase in sequence from away from the coating roller 1 to close to the coating roller 1. In this embodiment, the preheating device 8 is an electric heating tube, and the temperature control device is a controller for controlling the magnitude of the current flowing into the electric heating tube. A plurality of electric heating tubes are provided, each forming a heating area, and the temperature of the plurality of electric heating tubes is made different by the temperature control device, thereby forming a plurality of heating areas with different temperatures.

[0071] In this embodiment, the collecting member 3 is a box. When there is a lot of UV varnish recovered in the collecting member 3, it is added back to the feeding device for recycling. The collecting member is placed flat or obliquely under the multiple rollers. When the collecting member is placed obliquely under the multiple rollers, a discharge pipe is provided at the lower end of the collecting member to discharge the UV varnish in the collecting member in time. In order to make the UV varnish in the collecting member have better fluidity, some alcohol can be added regularly to facilitate the discharge of the UV varnish.

[0072] Example 2

[0073] The difference from Example 1 is:

[0074] This embodiment provides a second solution for the displacement control device 7:

[0075] The displacement control device 7 includes an electric push rod 71 with a multi-section telescopic rod, an adjustment plate 72 and an adjustment component. The adjustment plate 72 is fixed to the output end of the electric push rod 71, and the output end of the electric push rod 71 is a multi-section telescopic rod. The electric push rod 71 will move each pipe section of the multi-section telescopic rod at a uniform speed. There are multiple adjustment plates 72, and each adjustment plate 72 is set on a pipe section. Then the electric push rod 71 will make multiple adjustment plates 72 move away from each other at the same time, and the distance between any two adjustment plates 72 will increase and decrease at the same time. The pressure roller 2 is rotatably connected to the adjustment plate 72, so that the distance between multiple pressure rollers 2 is also increased and decreased at the same time. The pressure gap between multiple pressure rollers 2 is increased and decreased. The adjustment component is set between the pipe section and the adjustment plate 72, and the adjustment component includes: a connecting frame 73, a bolt 74 and a spring 75. The bolt 74 is threadably connected to the connecting frame 73, the connecting frame 73 is fixed to the pipe section, the adjustment plate 72 is slidably connected to the connecting frame 73, and the spring 75 is arranged between the connecting frame 73 and the adjustment plate 72. The spring 75 causes the adjustment plate 72 to be subjected to a force that moves close to the connecting frame 73. By rotating the screw, a force is applied to the adjustment plate 72 to move closer to or away from the spring 75, thereby causing the adjustment plate 72 to move relative to the connecting frame 73. Therefore, during the movement of multiple pressing rollers 2, the adjustment plate 72 can also be adjusted by rotating the screw to move the adjustment plate 72 relative to the connecting frame 73, and the position of the adjustment plate 72 can be fine-tuned, so that the size changes of multiple pressing gaps can be controlled automatically.

[0076] Example 3

[0077] The difference from Example 2 is:

[0078] The electric push rod 71 with multiple telescopic rods is replaced by a horizontal lifting structure, and the horizontal lifting structure drives the multiple adjustment plates 72 to move, so that the multiple pressure rollers 2 move.

[0079] The horizontal lifting structure includes: a first hinge rod, a second hinge rod, a hinge shaft and a hydraulic cylinder. Multiple first hinge rods and multiple second hinge rods are provided, and multiple first hinge rods and multiple second hinge rods are hinged to each other to form multiple scissor-shaped component structures. The hinge shaft is a part that hinges the first hinge rod and the second hinge rod together, and the connecting frame 73 is fixed to the hinge shaft.

[0080] Example 4

[0081] The difference from Example 1 is:

[0082] The preheating device 8 includes: a heating box 81, a conduit 82, a return pipe 83 and a pump body component 84. The temperature control device includes: a temperature sensor arranged in the heating box 81 and a control member arranged on the conduit 82. The pump body component 84 is used to add the heat exchange medium into the heating box 81. The heating box 81 is provided with a heating member for heating the heat exchange medium. The pressure roller 2 is formed with a receiving chamber, an inlet and an outlet. The temperature sensor is arranged in the heating box 81. The conduit 82 is rotatably connected with the pressure roller 2. The conduit 82 is used to connect the receiving chamber with the heating box 81. The temperature sensor is used to detect the temperature of the heat exchange medium in the heating box 81. The control member is used to control the opening and closing of the conduit 82. Among them, the conduit 82 is connected with the inlet, the return pipe 83 is connected with the outlet, and the return pipe 83 connects the outlet with the heating box 81, so that the heat exchange medium circulates between the receiving chamber and the heating box 81. The heat exchange medium is heated and then introduced into the pressure roller 2, thereby heating the pressure roller 2. The pressure roller 2 itself is in contact with the UV varnish, thereby directly heating the UV varnish through the pressure roller 2, better heating the UV varnish and reducing heat loss.

[0083] In this embodiment, the heat exchange medium is water or air. When the heat exchange medium is water, the pump body component 84 is a water pump, and when the heat exchange medium is air, the pump body component 84 is an air pump. The conduit 82 is rotatably connected to the pressure roller 2 through a rotating joint, and the return pipe 83 is rotatably connected to the pressure roller 2 through a rotating joint. Preferably, the heat exchange medium is air.

[0084] In other embodiments, a high heating area and a low heating area are formed in the accommodating chamber; the high heating area is located on the side of the pressure roller 2 close to the coating roller 1, and the low heating area is located on the side of the pressure roller 2 away from the coating roller 1. Specifically, the high heating area is located at the upper part of the side of the pressure roller 2 close to the coating roller 1, and the low heating area is the upper part of the side of the pressure roller 2 away from the coating roller 1.

[0085] Specific examples of high heating areas and low heating areas are:

[0086] The outlet direction of the conduit 82 forms an angle of 45-70° with the horizontal plane. An extension tube is set at the outlet of the conduit 82. There are multiple extension tubes, which are arranged in a linear array along the direction of the central axis of the pressure roller 2. The extension tube is close to the inner wall surface of the accommodating chamber.

[0087] Preferably, in this embodiment, the driving member 5 includes: a power motor 51, a motor bracket 52, a first gear 53, a second gear 54, a moving block 55, a slider 56 and a linear guide 57. The slider 56 is slidably connected to the linear guide 57, the moving block 55 is fixed to the slider 56, the moving block 55 is used to install the pressure roller 2, so that the pressure roller 2 is rotatably connected to the moving block 55, the motor bracket 52 is fixed to the moving block 55, the power motor 51 is installed on the motor bracket 52, the first gear 53 is connected to the output end of the power motor 51, the second gear 54 is connected to the power roller, and the first gear 53 is meshed with the second gear 54.

[0088] Among them, the first solution for the linear guide 57 is that the linear guide 57 is directly fixed to the gantry 41, so that the linear guide 57 is used to support the slider 56, so that the movement of multiple pressure rollers 2 is more stable. The second solution for the linear guide 57 is that one end of the linear guide 57 is hinged to the gantry 41, and the other end is hinged to the output end of a first cylinder, and the first cylinder is fixed to the cabinet 4, so that the angle of the linear guide 57 can be changed. In some cases, the tilt angle can be increased, so that the UV varnish is increased in flow speed due to gravity. The third solution for the linear guide 57 is that one end of the linear guide 57 is hinged to a second cylinder, and the other end is hinged to a third cylinder, and both the first cylinder and the second cylinder are fixed to the cabinet 4.

[0089] Example 5

[0090] The difference from Example 4 is that another specific example of the high heating area and the low heating area is provided:

[0091] The preheating device 8 further includes: a first connection disk 85, a second connection disk 86 and a fixing box 87. A plurality of fixing boxes 87 are provided, and the plurality of fixing boxes 87 are all fixed to the inner wall surface of the accommodating chamber, and the plurality of fixing boxes 87 are distributed in a circular array around the central axis of the pressing roller 2. A plurality of connecting pipes 88 are provided, and the connecting pipes 88 are used to connect any two adjacent fixing boxes 87, the first connection disk 85 is fixed to the conduit 82, and the second connection disk 86 is fixed to the return pipe 83. A first connecting chamber is formed in the first connection disk 85, and a second connecting chamber is formed in the second connection disk 86, the first connecting chamber is connected to the conduit 82, and the second connecting chamber is connected to the return pipe 83. A first through hole 851 is provided on the first connection plate 85, a second through hole 861 is provided on the second connection plate 86, and a third through hole 871 is provided on each of the plurality of fixed boxes 87, wherein the portion of the conduit 82 and the return pipe 83 located in the accommodation chamber is a rigid tube body, and the conduit 82 and the return pipe 83 are both fixed to the moving block 55, so that the first connection plate 85 and the second connection plate 86 are fixed, and the pressure roller 2 is rotatable. In some schemes, a bearing is provided between the first connection plate 85 and the inner wall surface of the accommodation chamber, and a bearing is provided between the second connection plate 86 and the inner wall surface of the accommodation chamber, so that the first connection plate 85 and the second connection plate 86 can guide the rotation of the pressure roller 2. When the pressure roller 2 rotates to the point where the third through hole 871 on the fixed box 87 matches the first through hole 851, the conduit 82 will add the heat exchange medium into the fixed box 87, so that the area on the pressure roller 2 where the fixed box 87 and other fixed boxes 87 adjacent to the fixed box 87 are located is a high heating area. When the pressure roller 2 rotates until the third hole on the fixed box 87 matches the second hole, the heat exchange medium in the fixed box 87 is pumped out, and then pumped into the heating box 81 for heating before re-entering the conduit 82. At this time, the area on the pressure roller 2 where the fixed box 87 and other adjacent fixed boxes 87 are located is a low heating area.

[0092] Through the above-mentioned scheme, when the UV varnish is heated, the uniform heating of the UV varnish can be better guaranteed, and the UV varnish can be prevented from being exposed to heating far greater than its own temperature, thereby better ensuring the transfer of the UV varnish between multiple pressure rollers 2 and avoiding the uneven thickness of the UV varnish applied on the base film.

[0093] Specifically, the area where the fixing box 87 is located near the first through hole 851 is the high heating area, and the area where the fixing box 87 is located near the second through hole 861 is the low heating area.

[0094] More specifically, the first connecting plate 85 contacts one side of the fixing box 87, the second connecting plate 86 contacts the other side of the fixing box 87, and the first through hole 851, the second through hole 861 and the third through hole 871 are all grooves, thereby increasing the time for the first through hole 851 to match the third through hole 871, and the time for the second through hole 861 to match the third through hole 871.

[0095] The line connecting the first through hole 851 and the central axis of the pressing roller 2 forms an acute angle of 60° with the horizontal plane, and the line connecting the second through hole 861 and the central axis of the pressing roller 2 forms an obtuse angle of 120° with the horizontal plane.

[0096] In some other embodiments, the preheating device 8 and the temperature control device are provided in multiple groups, wherein at least two groups of the preheating device 8 and the temperature control device cooperate with one of the pressing rollers 2. To be precise, the conduit 82 and the return pipe 83 are both branched pipe bodies, having branch pipes and combined pipes, the combined pipes are used to communicate with the accommodating chamber, and the branch pipes are used to communicate with the heating chamber.

[0097] In some other embodiments, the structure around the coating roller 1 is the same as the structure around the pressing roller 2 .

[0098] In some other embodiments, fixed tubes are arranged between the plurality of fixed boxes 87 , and the fixed tubes are filled with water. The water can be heated, and since the specific heat capacity of water is relatively high, the water can be insulated in reverse.

[0099] Example 6

[0100] The difference from Example 1 is that the scraper 6 includes: a rotating roller 61, a rotating drive component 62 and a scraper portion 63; the scraper portion 63 is a plate body, and a plurality of scrapers 63 are provided, and the plurality of scrapers 63 are all provided on the rotating roller 61; the rotating drive component 62 is a motor, and the output end of the rotating drive component 62 is connected to the rotating roller 61; the rotating power component is installed on the gantry 41; the rotating roller 61 is rotatably connected to the gantry 41; the scraper portion 63 is brought into contact with the coating roller 1 through the process of rotation of the rotating roller 61, thereby scraping off the UV varnish adhered to the coating roller 1, and throwing it outward by utilizing the centrifugal force of the rotation, so that it can be better added to the collecting member 3.

[0101] The implementation principle of a production device for laser transfer anti-counterfeiting film in the embodiment of the present application is as follows:

[0102] The base film is transported on the corresponding equipment, and then the base film passes through the coating roller 1, the laser transfer part and the curing device in sequence.

[0103] Among them, the feeding device will make the UV varnish flow continuously on the pressure roller 2, and multiple pressure rollers 2 will rotate to transport and press the UV varnish. Multiple pressure rollers 2 will transport the UV varnish to the coating roller 1, and the coating roller 1 will rotate to coat the UV varnish on the base film.

[0104] When the plurality of pressure rollers 2 transport the UV varnish, the preheating device 8 heats the pressure rollers 2 to heat the UV varnish.

[0105] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A production device for laser transfer anti-counterfeiting film, characterized in that: include A coating roller contacts the base film for laser transfer and applies UV varnish on the base film; A plurality of pressing rollers are provided, and a plurality of pressing gaps are formed between the plurality of pressing rollers; The plurality of pressure rollers are used to form a conveying area for conveying the UV varnish to the coating roller; A driving member is used to provide power for rotating the plurality of pressure rollers; A material receiving device, used to form a scraper that contacts the coating roller and a collecting member for receiving UV varnish overflowing from the material pressing gap; A feeding device, used for feeding the UV varnish to a pressure roller away from the coating roller; A laser transfer member, used for performing a laser transfer operation on the base film passing through the coating roller; A curing device, used for UV curing the base film after laser transfer; The production equipment also includes: a preheating device and a temperature control device; the preheating device directly or indirectly heats the UV varnish to a preset temperature; The temperature control device is used to enable the preheating device to form a plurality of heating areas with different temperatures; The temperatures of the plurality of heating areas are increased in sequence from a direction away from the coating roller to a direction close to the coating roller; The preheating device comprises: a heating box, a conduit and a pump body component; The temperature control device comprises: a temperature sensor arranged in the heating box and a control member arranged on the conduit; The pump body component is used to add the heat exchange medium into the heating box; a heating element for heating the heat exchange medium is arranged in the heating box; a receiving chamber, an inlet and an outlet are formed on the pressure roller; The temperature sensor is arranged in the heating box, the conduit is rotatably connected to the pressing roller, and the conduit is used to connect the accommodating chamber with the heating box; The temperature sensor is used to detect the temperature of the heat exchange medium in the heating box, and the control element is used to control the opening and closing of the conduit; A high heating area and a low heating area are formed in the accommodating chamber; the high heating area is located on the side of the pressing roller close to the coating roller, and the low heating area is located on the side of the pressing roller away from the coating roller; The preheating device also includes: a first connecting disk, a second connecting disk and a fixed box; a plurality of fixed boxes are provided, and the plurality of fixed boxes are all fixed to the inner wall surface of the accommodating chamber, and the plurality of fixed boxes are distributed in a circular array around the central axis of the pressure roller; a plurality of connecting pipes are provided, and the connecting pipe is used to connect any two adjacent fixed boxes, the first connecting disk is fixed to the conduit, and the second connecting disk is fixed to the return pipe; a first connecting chamber is formed in the first connecting disk, and a second connecting chamber is formed in the second connecting disk, the first connecting chamber is connected to the conduit, and the second connecting chamber is connected to the return pipe; a first through hole is provided on the first connecting disk, a second through hole is provided on the second connecting disk, and a third through hole is provided on the plurality of fixed boxes, wherein the portion of the conduit and the return pipe located in the accommodating chamber is a rigid tube body, and the conduit and the return pipe are both fixed to the moving block, so that the first connecting disk and the second connecting disk are fixed, and the pressure roller is rotatable.

2. The production equipment of a laser transfer anti-counterfeiting film according to claim 1, characterized in that: The vertical distances between the axes of the plurality of pressure rollers and the axis of the coating roller decrease in sequence from a direction away from the coating roller to a direction close to the coating roller.

3. The production equipment of a laser transfer anti-counterfeiting film according to claim 1, characterized in that: The sizes of the plurality of nip gaps decrease in sequence from a direction away from the coating roller to a direction close to the coating roller.

4. The production equipment of a laser transfer anti-counterfeiting film according to claim 1, characterized in that: The plurality of pressing rollers are all located above the coating roller; the collecting member is located above the base film; The plurality of pressing rollers rotate in the same direction, and the coating roller and the pressing roller rotate in the same direction.

5. The production equipment of laser transfer anti-counterfeiting film according to any one of claims 1 to 4, characterized in that: The production equipment also includes: Displacement control device and gantry; The gantry is used to install the displacement control device, the material receiving device, the material feeding device, the pressure roller and the coating roller; The displacement control device is used to directly or indirectly drive the plurality of pressing rollers to move so that the sizes of the plurality of pressing gaps are uniformly or non-uniformly increased or decreased.

6. A laser transfer anti-counterfeiting film, characterized in that: The invention comprises, from bottom to top, a base film, a UV varnish layer, a laser transfer layer and a protective layer; the UV varnish layer is coated on the base film by the production equipment of the laser transfer anti-counterfeiting film according to any one of claims 1 to 5.

7. A laser transfer anti-counterfeiting paper, characterized in that: include: The laser transfer anti-counterfeiting film, base paper and adhesive layer as described in claim 6; the laser transfer anti-counterfeiting film is adhered to the base paper through the adhesive layer.

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