Metallized Film Processing Device and Process

Abstract

The present invention provides a metallized film processing device, which relates to the technical field of metallized film processing. The processing device includes a sealed box body, an air pump, and a vortex tube. Inside the sealed box body, a film unwinding roller, a preheating roller, a cooling roller, and a winding roller are sequentially rotatably arranged in the direction from film feeding to film winding. The air pump and the vortex tube are both arranged outside the sealed box body. The vortex tube has an input end, a hot air output end, and a cold air output end. The output end of the air pump is connected to the input end of the vortex tube through an input pipe. The hot air output end of the vortex tube is connected to a first solenoid valve group. The first solenoid valve group has at least two hot air output ends. The hot air output ends of the first solenoid valve group are hermetically and rotatably connected to the air inlet end of the preheating hollow shaft through hot air output pipes. The hot air generated by the vortex tube is input into the preheating roller in a flowing manner, so that the surface temperature of the preheating roller is close to a constant temperature state; the surface temperature of the preheating roller can be better controlled, the preheating of the film is more uniform, and the film is not easily deformed.

Description

Technical Field

[0001] The present invention relates to the technical field of metallized film processing, and particularly to a metallized film processing device and process. Background Art

[0002] A metallized film is a metal film evaporated on the surface of a polyester film to replace a metal foil as an electrode. The thickness of the metallized film layer is much smaller than that of the metal foil. Currently, metallized films are mainly processed and prepared by a vacuum coating machine, including an insulating film unwinding mechanism, a coating mechanism, and a film winding mechanism after the metal layer is deposited.

[0003] A thickening coating device for metallized film processing disclosed in the prior art application publication number CN106244996A includes a preheating mechanism, a first evaporation coating device, and a second evaporation coating device in sequence from front to back according to the process flow; the preheating mechanism includes a link transmission mechanism, a heater, and a first telescopic device; the first evaporation coating device includes a first evaporation drum and a first evaporation boat; the first evaporation boat is arranged below the first evaporation drum, and the swing of the transmission rod is driven by the telescopic movement of the first telescopic device, so as to drive the heater to swing left and right, so that the heater realizes three-dimensional movement and can realize movement on the same horizontal plane to preheat the insulating film.

[0004] It mainly heats the film by electric heating. The electric heating temperature is not easy to control, and through electric heating radiation, the temperature in the heat radiation direction will also gradually increase. The continuously increasing temperature will also cause the film to deform, affecting the quality of the metallized film.

[0005] In view of this, the inventors of the present application have invented a metallized film processing device and process. Summary of the Invention

[0006] The present invention provides a metallized film processing device and process in view of the deficiencies of the prior art.

[0007] The present invention realizes the solution to the above technical problems through the following technical means: a metallized film processing device, including a sealed box body, an air pump, and a vortex tube. Inside the sealed box body, a unwind roller, a preheating roller, a cooling roller, and a winding roller are sequentially rotatably arranged in the direction from film unwinding to film winding. The evaporation boat is arranged below the cooling roller. The inside of the preheating roller is hollow, and preheating hollow shafts are fixedly penetrated at both ends of the preheating roller. The preheating hollow shafts are communicated with the inside of the preheating roller. The preheating roller penetrates through the sealed box body, and the preheating roller is rotatably and sealingly connected to the sealed box body through a sealed rotating member. The air pump and the vortex tube are both arranged outside the sealed box body. The vortex tube has an input end, a hot air output end, and a cold air output end. The output end of the air pump is connected to the input end of the vortex tube through an input pipe. The hot air output end of the vortex tube is connected to a first solenoid valve group. The first solenoid valve group has at least two hot air output ends. The hot air output ends of the first solenoid valve group are sealingly and rotatably connected to the air inlet end of the preheating hollow shaft through hot air output pipes. The hot air generated by the vortex tube is input into the preheating roller in a flowing manner, so that the surface temperature of the preheating roller is close to a constant temperature state.

[0008] Further, the preheating hollow shaft is sealingly and rotatably connected to the hot air output pipe through a first rotary joint. The air inlet end of the hot hollow shaft is fixed to one end of the first rotary joint, and the other end of the first rotary joint is fixed to the hot air output pipe.

[0009] Further, a plurality of first fins are arranged on the inner wall of the preheating roller. The first fins are arranged along the length direction of the preheating roller. The plurality of first fins are evenly distributed inside the preheating roller. The arrangement direction of the first fins is the same as the flowing direction of the hot air inside the preheating roller.

[0010] Further, a plurality of preheating rollers are arranged between the unwind roller and the cooling roller. Before coating, the film sequentially passes through the surfaces of the plurality of preheating rollers. The number of hot air output ends of the first solenoid valve group is not less than the number of preheating rollers. The hot air output ends of the first solenoid valve group respectively input hot air into different preheating rollers through different hot air output pipes.

[0011] Further, the surface temperatures of the plurality of preheating rollers in the film moving direction gradually increase.

[0012] Further, the inside of the cooling roller is hollow, and cooling hollow shafts are fixedly penetrated at both ends of the cooling roller. The cooling hollow shafts penetrate through the sealed box body, and the cooling hollow shafts are sealingly and rotatably connected to the sealed box body through rotating seals. The inside of the cooling hollow shafts is communicated with the inside of the cooling roller. The cold air output end of the vortex tube is provided with a second solenoid valve group. The second solenoid valve group has a plurality of cold air output ends. The cold air output ends of the second solenoid valve group are sealingly and rotatably connected to one end of the cooling hollow shaft through cold air output pipes. The cold air generated by the vortex tube is input into the cooling roller in a flowing manner, so that the surface temperature of the cooling roller is close to a constant temperature state.

[0013] Further, a number of second fins are provided on the inner wall of the cooling roller. The second fins are arranged along the length direction of the cooling roller, and a number of second fins are evenly distributed inside the cooling roller. The arrangement direction of the second fins is consistent with the flowing direction of the cold air inside the cooling roller.

[0014] Further, a first laser thermometer and a second laser thermometer are provided inside the sealed box. The first laser thermometer is used to monitor the surface temperature of the preheating roller, and the second laser thermometer is used to monitor the surface temperature of the cooling roller. Both the first laser thermometer and the second laser thermometer are signal-connected to the control device.

[0015] Further, a heat insulation plate is transversely arranged inside the sealed box. The heat insulation plate divides the inside of the sealed box into upper and lower chambers. The chamber located above the sealed box is the driving chamber, and the chamber located below the sealed box is the evaporation chamber. The evaporation boat is located inside the evaporation chamber, and the unwind roller, the preheating roller, the cooling roller, and the winding roller are all located inside the driving chamber. A hole is opened in the middle of the heat insulation plate, and the bottom end of the cooling roller extends into the evaporation chamber through the hole.

[0016] The present invention provides a metallized film processing process, including the following steps:

[0017] S1. Preheating: Preheat the film before coating.

[0018] S2. Coating: Coat the film passing above the evaporation boat.

[0019] S3. Cooling: Cool the film during coating.

[0020] S4. Winding: After the film is coated to form a metallized film, wind the metallized film.

[0021] The beneficial effects of the present invention:

[0022] (1) For the metallized film processing device of the present invention, when it is necessary to preheat the film before coating, start the air pump. The air pump compresses air and introduces it into the vortex tube. The compressed air rotates inside the vortex tube. The hot air rotates close to the inner wall of the vortex tube, and the cold air rotates at the center inside the vortex tube. The hot air and the cold air are separated. The hot air flows out from the hot air output end of the vortex tube and is input into the preheating roller through the hot air output pipe. The preheating roller absorbs the heat in the hot air and conducts the heat to the film passing through the preheating roller. The air that has absorbed the heat is discharged from the preheating hollow shaft at the other end of the preheating roller. By controlling the first solenoid valve group, the intake air volume inside the preheating roller is adjusted, and the surface temperature of the preheating roller is controlled by the flowing air. The surface temperature of the preheating roller is better controlled, making the surface temperature of the preheating roller close to a constant temperature state. Compared with the traditional heating lamp for heating the film, the temperature is better controlled, the preheating of the film is more uniform, and the film is not easily deformed.

[0023] (2) In the metallized film processing device of the present invention, secondly, hot air enters from one end inside the preheating roller and exits from the other end of the preheating roller. Excessive heat will not accumulate inside the sealed box, and the excess heat is directly discharged from one end of the preheating roller. However, the heat generated by the heating lamp is likely to accumulate inside the sealed box, which will cause the overall temperature of the sealed box to rise and is not conducive to the cooling of the metal film after coating.

[0024] (3) In the metallized film processing device of the present invention, in the moving direction of the film before coating, the surface temperature of the preheating roller is set to increase gradually, so that the film before coating is gradually heated, and the heating of the film before coating is more uniform.

[0025] (4) In the metallized film processing device of the present invention, when it is necessary to cool the film during coating, the cold air generated by the vortex tube flows out from the cold air output end of the second solenoid valve group, is input into the cooling hollow shaft through the cold air output pipe, and then enters the cooling roller through the cooling hollow shaft. The cold air quickly absorbs the heat on the surface of the cooling roller and is discharged from the cooling hollow shaft at the other end of the cooling roller. The intake air volume inside the cooling roller can be adjusted by controlling the opening degree of the second solenoid valve group. The surface temperature of the preheating roller is controlled by the flowing cold air, and the surface temperature of the preheating roller is better controlled, making the surface temperature of the preheating roller close to a constant temperature state, that is, remaining at a constant low temperature for a long time, which is more conducive to quickly cooling and reducing the temperature of the film during coating.

[0026] (5) In the metallized film processing device of the present invention, under the action of the preheating roller and the cooling roller, and with the real-time temperature feedback of the first laser temperature sensor and the second laser temperature sensor, the control device respectively adjusts the opening degree of the hot air output end of the first solenoid valve group and the opening degree of the cold air output end of the second solenoid valve group, so that the temperature in the drive chamber is in a dynamic balance state, ensuring that the temperature in the drive chamber is neither too high nor too low, reducing the influence of temperature on the film, and further stabilizing the quality of the metallized film. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the internal structure of the metallized film processing device of the present invention;

[0028] Figure 2 is a schematic diagram of the installation structure of the vortex tube in an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of the installation structure of the vortex tube in another embodiment of the present invention;

[0030] In the figure: 1. Sealed box body; 2. Unwinding roller; 3. Preheating roller; 4. Evaporation boat; 5. Cooling roller; 6. Heat insulation plate; 7. Rewinding roller; 8. Vortex tube; 9. First electromagnetic valve group; 10. Second electromagnetic valve group; 11. Control device; 12. Air pump; 13. First rotary joint; 14. Second rotary joint; 101. Evaporation chamber; 102. Driving chamber; 30. First fin; 31. Preheating hollow shaft; 32. First laser thermometer; 50. Second fin; 51. Cooling hollow shaft; 52. Second laser thermometer. Specific embodiments

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a middle element at the same time.

[0033] Embodiment 1

[0034] Please refer to Figure 1 As shown, the metalized film processing device in this embodiment includes a sealed box body 1, an unwinding roller 2, a preheating roller 3, an evaporation boat 4, a cooling roller 5, a rewinding roller 7, a vortex tube 8, and an air pump 12. Inside the sealed box body 1, an unwinding roller 2, a preheating roller 3, a cooling roller 5, and a rewinding roller 7 are sequentially rotatably arranged in the direction from film feeding to film winding. After the film is fed by the unwinding roller 2, it passes through the preheating roller 3. The preheating roller 3 preheats the film before coating and also redirects the film. The preheated film passes through the surface of the cooling roller 5. The evaporation boat 4 arranged directly below the cooling roller 5 evaporates the metal, forming a metal film on the surface of the film. In this embodiment, the metal material is aluminum, and aluminum can firmly adhere to the surface of the film. The cooling roller 5 quickly cools the film and the metal layer formed on the film surface to avoid damage to the film caused by high temperature, and then winds it on the surface of the rewinding roller 7.

[0035] The preheating roller 3 is hollow inside. At both ends of the preheating roller 3, preheating hollow shafts 31 are fixedly inserted. The preheating hollow shafts 31 communicate with the inside of the preheating roller 3. The preheating roller 3 penetrates through the sealed box 1. The preheating roller 3 is rotationally and sealingly connected to the sealed box 1 through a sealing rotating member. The sealing rotating member can be a sealing bearing or other components that can make the preheating hollow shaft 31 be rotationally and sealingly connected to the sealed box 1. In this embodiment, it is used without improvement.

[0036] Please refer to Figure 2 As shown, the air pump 12 and the vortex tube 8 are both arranged outside the sealed box 1. The vortex tube 8 has an input end, a hot air output end, and a cold air output end. The flow direction of the hot air in the vortex tube 8 is the same as that shown by the direction B in Figure 2 The flow direction of the cold air in the vortex tube 8 is the same as that shown by the direction C in Figure 2 As shown.

[0037] The output end of the air pump 12 is connected to the input end of the vortex tube 8 through an input pipe. The hot air output end of the vortex tube 8 is connected to a first solenoid valve group 9. The first solenoid valve group 9 has at least two hot air output ends. The hot air output ends of the first solenoid valve group 9 are sealingly and rotationally connected to the intake end of the preheating hollow shaft 31 through hot air output pipes. Specifically, the preheating hollow shaft 31 is sealingly and rotationally connected to the hot air output pipe through a first rotary joint 13. The intake end of the preheating hollow shaft 31 is fixed to one end of the first rotary joint 13, and the other end of the first rotary joint 13 is fixed to the hot air output pipe. In this way, when the preheating hollow shaft 31 rotates, it will not drive the hot air output pipe to rotate, that is, the rotation of the preheating hollow shaft 31 will not interfere with the hot air output pipe.

[0038] During use, when it is necessary to preheat the film before coating, the air pump 12 is started. The compressed air of the air pump 12 is introduced into the vortex tube 8. The compressed air rotates in the vortex tube 8. The hot air rotates near the inner wall of the vortex tube 8, and the cold air rotates at the center of the vortex tube 8. The hot air is separated from the cold air. The hot air flows out from the hot air output end of the vortex tube 8, as shown by the direction B in Figure 2 It is input into the preheating hollow shaft 31 through the hot air output pipe, and then input into the preheating roller 3 through the preheating hollow shaft 31. The preheating roller 3 absorbs the heat in the hot air and conducts the heat to the film passing through the preheating roller 3. The air that has absorbed the heat is discharged from the preheating hollow shaft 31 at the other end of the preheating roller 3, as shown by Figure 2As shown in the D direction in the figure, by controlling the first solenoid valve group 9, the intake air volume inside the preheating roller 3 is adjusted, and the surface temperature of the preheating roller 3 is controlled by the flowing air. The surface temperature of the preheating roller 3 is better controlled, making the surface temperature of the preheating roller 3 close to a constant temperature state. Compared with the traditional heating lamp for heating the film, the temperature is better controlled, the preheating of the film is more uniform, and the film is not easily deformed. Secondly, the hot air enters from one end inside the preheating roller 3 and exits from the other end of the preheating roller 3. Excessive heat will not accumulate in the sealed box 1, and the excess heat is directly discharged from one end of the preheating roller 3. However, the heat generated by the heating lamp is likely to accumulate in the sealed box 1, which will cause the overall temperature of the sealed box 1 to rise, being unfavorable for the cooling of the metal film after coating.

[0039] To improve the heat conduction performance of the preheating roller 3, a number of first fins 30 are provided on the inner wall of the preheating roller 3. The first fins 30 are arranged along the length direction of the preheating roller 3, and a number of first fins 30 are evenly distributed inside the preheating roller 3. The setting direction of the first fins 30 is the same as the flowing direction of the hot air inside the preheating roller 3. The first fins 30 are used to increase the contact area between the preheating roller 3 and the hot air, thereby increasing the heat conduction performance of the preheating roller 3.

[0040] To avoid the film deforming due to over - rapid temperature rise before coating, a number of preheating rollers 3 are arranged between the unwinding roller 2 and the cooling roller 5. Before coating, the film passes through the surfaces of a number of preheating rollers 3 in sequence. The number of hot - air output ends of the first solenoid valve group 9 is not less than the number of preheating rollers 3. In this way, the excess hot air generated by the vortex tube 8 can be discharged through the excess output ends. The hot - air output ends of the first solenoid valve group 9 all input hot air into different preheating rollers 3 through different hot - air output pipes. The surface temperatures of a number of preheating rollers 3 along the film moving direction gradually increase. The film moving direction is as Figure 1 shown in the A direction in the figure, that is, the temperature of the film before coating gradually increases.

[0041] By setting the surface temperatures of the preheating rollers 3 to increase sequentially in the film moving direction before coating, the film before coating is gradually heated, making the temperature rise of the film before coating more uniform.

[0042] Setting the surface temperatures of the preheating rollers 3 to increase sequentially can be achieved by controlling the hot - air flow rates of different hot - air output ends of the first solenoid valve group 9. That is, the higher the surface temperature of the preheating roller 3 closer to the rear end of the film movement, the more the hot - air flow rate entering this preheating roller 3, and vice versa. The opening sizes of different hot - air output ends of the first solenoid valve group 9 can be set manually or adjusted by the control device 11. The first solenoid valve group 9 is signal - connected to the control device 11, and the control program can be simply programmed by those skilled in the art.

[0043] Embodiment Two

[0044] During the thin film coating of the evaporation boat 4, in order to prevent the thin film from deforming due to high temperature, it is also necessary to cool the thin film in a timely manner. In the first embodiment, when the vortex tube 8 generates hot air, it also generates cold air. In order to utilize this part of the cold air, on the basis of the first embodiment, this embodiment further modifies the machine design to further reduce the processing cost of the metallized thin film.

[0045] Please refer to Figure 1 As shown, the inside of the cooling roller 5 is hollow. At both ends of the cooling roller 5, cooling hollow shafts 51 are fixedly penetrated. The cooling hollow shafts 51 penetrate through the sealed box body 1. The cooling hollow shafts 51 are rotationally and sealingly connected to the sealed box body 1 through rotating seals. The inside of the cooling hollow shafts 51 is communicated with the inside of the cooling roller 5. The rotating seal can be a sealed bearing or other components that can rotationally and sealingly connect the cooling hollow shafts 51 to the sealed box body 1. In this embodiment, only its use is carried out, and no improvement is made to it.

[0046] At the cold air output end of the vortex tube 8, a second solenoid valve group 10 is provided. The second solenoid valve group 10 has several cold air output ends. The cold air output ends of the second solenoid valve group 10 are rotationally and sealingly connected to one end of the cooling hollow shaft 51 through cold air output pipes. Specifically, the cold air output pipes are rotationally and sealingly connected to the cooling hollow shaft 51 through second rotary joints 14. One end of the second rotary joint 14 is fixed to the cooling hollow shaft 51, and the other end of the second rotary joint 14 is fixed to the cold air output pipe. The second rotary joint 14 is an existing product. In this embodiment, only its use is carried out, and no improvement is made to it.

[0047] During use, when it is necessary to cool the thin film during coating, the cold air generated by the vortex tube 8 flows out from the cold air output end of the second solenoid valve group 10, as shown in the C direction in Figure 3 , and is input into the cooling hollow shaft 51 through the cold air output pipe. It is input into the cooling roller 5 through the cooling hollow shaft 51. The cold air quickly absorbs the heat on the surface of the cooling roller 5 and is discharged from the cooling hollow shaft 51 at the other end of the cooling roller 5. The discharge direction is as shown in the D direction in Figure 3 . Similarly, by controlling the second solenoid valve group 10, the intake air volume in the cooling roller 5 can be adjusted, and the surface temperature of the preheating roller 3 can be controlled by the flowing cold air. The surface temperature of the preheating roller 3 is easier to control, so that the surface temperature of the preheating roller 3 is close to a constant temperature state, that is, it is in a constant low temperature state for a long time, and it is easier to quickly cool and cool the thin film during coating.

[0048] In order to improve the heat conduction performance of the cooling roller 5, a number of second fins 50 are provided on the inner wall of the cooling roller 5. The second fins 50 are arranged along the length direction of the cooling roller 5. A number of second fins 50 are evenly distributed inside the cooling roller 5. The arrangement direction of the second fins 50 is the same as the flowing direction of the cold air inside the cooling roller 5. The second fins 50 are used to increase the contact area between the cooling roller 5 and the cold air, thereby increasing the heat conduction performance of the cooling roller 5 and increasing the cooling performance of the thin film during coating.

[0049] Example 3

[0050] This example is a further improved design based on Example 2. A first laser thermometer 32 and a second laser thermometer 52 are arranged in the sealed box body 1. The first laser thermometer 32 is used to monitor the surface temperature of the preheating roller 3, and the second laser thermometer 52 is used to monitor the surface temperature of the cooling roller 5. Both the first laser thermometer 32 and the second laser thermometer 52 are signal-connected to the control device 11. By the temperature values fed back by the first laser thermometer 32 and the second laser thermometer 52, the opening degrees of the first solenoid valve group 9 and the second solenoid valve group 10 are better controlled, and the surface temperatures of the preheating roller 3 and the cooling roller 5 are better controlled respectively.

[0051] Example 4

[0052] Please refer to Figure 1 As shown, a heat insulation plate 6 is horizontally arranged in the sealed box body 1. Horizontally as shown in the direction of A, the heat insulation plate 6 divides the inside of the sealed box body 1 into upper and lower chambers. The chamber above the sealed box body 1 is the drive chamber 102, and the chamber below the sealed box body 1 is the evaporation chamber 101. The evaporation boat 4 is located in the evaporation chamber 101, and the unwinding roller 2, the preheating roller 3, the cooling roller 5, and the winding roller 7 are all located in the drive chamber 102. The middle of the heat insulation plate 6 is provided with an opening, and the bottom end of the cooling roller 5 extends into the evaporation chamber 101 through the opening, which can reduce the entry of overheated air in the evaporation chamber 101 into the drive chamber 102. Figure 1 Under the action of the preheating roller 3 and the cooling roller 5, and with the real-time temperature feedback of the first laser thermometer 32 and the second laser thermometer 52, the control device 11 adjusts the opening degree of the hot gas output end of the first solenoid valve group 9 and the opening degree of the cold gas output end of the second solenoid valve group 10 respectively, so that the temperature in the drive chamber 102 is in a dynamic balance state, so that the temperature in the drive chamber 102 will not be too high or too low, reducing the influence of temperature on the film and further stabilizing the quality of the metallized film.

[0053] Example 5

[0054] The metallized film processing process described in this example includes the following steps:

[0055] S1. Preheating, preheating the film before coating;

[0056] S2. Coating, coating the film passing above the evaporation boat 4;

[0057] S3. Cooling, cooling the film during coating;

[0058] S3. Winding, after the film is coated to form a metallized film, winding the metallized film.

[0059] S3. Winding, after the film is coated to form a metallized film, winding the metallized film.

[0060] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0061] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Metalized film processing device, comprising a sealed box body (1), an air pump (12), and a vortex tube (8). Inside the sealed box body (1), a film unwinding roller (2), a preheating roller (3), a cooling roller (5), and a winding roller (7) are rotatably arranged in sequence from the direction of feeding the film to winding the film. An evaporation boat (4) is arranged below the cooling roller (5), and it is characterized in that: The preheating roller (3) is hollow inside. At both ends of the preheating roller (3), preheating hollow shafts (31) are fixedly inserted. The preheating hollow shafts (31) communicate with the inside of the preheating roller (3). The preheating roller (3) penetrates through the sealed box body (1). The preheating roller (3) is rotationally and sealingly connected to the sealed box body (1) through a sealing rotating member. The air pump (12) and the vortex tube (8) are both arranged outside the sealed box body (1). The vortex tube (8) has an input end, a hot air output end, and a cold air output end. The output end of the air pump (12) is connected to the input end of the vortex tube (8) through an input pipe. The hot air output end of the vortex tube (8) is connected to a first solenoid valve group (9). The first solenoid valve group (9) has at least two hot air output ends. The hot air output ends of the first solenoid valve group (9) are sealingly and rotationally connected to the intake end of the preheating hollow shaft (31) through hot air output pipes. The hot air generated by the vortex tube (8) is input into the preheating roller (3) in a flowing manner, making the surface temperature of the preheating roller (3) close to a constant temperature state; A number of first fins (30) are arranged on the inner wall of the preheating roller (3). The first fins (30) are arranged along the length direction of the preheating roller (3). A number of first fins (30) are evenly distributed inside the preheating roller (3). The arrangement direction of the first fins (30) is the same as the flowing direction of the hot air inside the preheating roller (3); A number of preheating rollers (3) are arranged between the unwinding roller (2) and the cooling roller (5). Before coating, the film passes through the surfaces of a number of preheating rollers (3) in sequence. The number of hot air output ends of the first solenoid valve group (9) is not less than the number of preheating rollers (3). The hot air output ends of the first solenoid valve group (9) all input hot air into different preheating rollers (3) through different hot air output pipes; The surface temperatures of a number of preheating rollers (3) along the film moving direction gradually increase.

2. The metallized film processing apparatus according to claim 1, wherein: The preheating hollow shaft (31) is sealingly and rotationally connected to the hot air output pipe through a first rotary joint (13). The intake end of the hot hollow shaft (31) is fixed at one end of the first rotary joint (13), and the other end of the first rotary joint (13) is fixed to the hot air output pipe.

3. The metallized film processing device according to claim 2, wherein: The cooling roller (5) is hollow inside. At both ends of the cooling roller (5), cooling hollow shafts (51) are fixedly inserted. The cooling hollow shafts (51) penetrate through the sealed box body (1). The cooling hollow shafts (51) are sealingly and rotationally connected to the sealed box body (1) through rotating seals. The inside of the cooling hollow shafts (51) communicates with the inside of the cooling roller (5). At the cold air output end of the vortex tube (8), a second solenoid valve group (10) is arranged. The second solenoid valve group (10) has a number of cold air output ends. The cold air output ends of the second solenoid valve group (10) are sealingly and rotationally connected to one end of the cooling hollow shaft (51) through cold air output pipes. The cold air generated by the vortex tube (8) is input into the cooling roller (5) in a flowing manner, making the surface temperature of the cooling roller (5) close to a constant temperature state.

4. The metallized film processing apparatus according to claim 3, wherein: A number of second fins (50) are arranged on the inner wall of the cooling roller (5). The second fins (50) are arranged along the length direction of the cooling roller (5). A number of second fins (50) are evenly distributed inside the cooling roller (5). The arrangement direction of the second fins (50) is the same as the flowing direction of the cold air inside the cooling roller (5).

5. The metallized film processing device according to claim 4, wherein: Inside the sealed box body (1), a first laser thermometer (32) and a second laser thermometer (52) are provided. The first laser thermometer (32) is used to monitor the surface temperature of the preheating roller (3), and the second laser thermometer (52) is used to monitor the surface temperature of the cooling roller (5). Both the first laser thermometer (32) and the second laser thermometer (52) are signal-connected to the control device (11).

6. The metallized film processing apparatus according to claim 5, wherein: Inside the sealed box body (1), a heat insulation plate (6) is transversely arranged. The heat insulation plate (6) divides the inside of the sealed box body (1) into upper and lower chambers. The chamber located above the sealed box body (1) is the drive chamber (102), and the chamber located below the sealed box body (1) is the evaporation chamber (101). The evaporation boat (4) is located inside the evaporation chamber (101). The unwind roller (2), the preheating roller (3), the cooling roller (5), and the winding roller (7) are all located inside the drive chamber (102). The middle of the heat insulation plate (6) is provided with an opening, and the bottom end of the cooling roller (5) extends into the evaporation chamber (101) through the opening.

7. The processing technology of metallized film, which is the processing technology of the metallized film processing device according to any one of claims 1-6, is characterized in that: It includes the following steps: S1. Preheating: Preheat the film before coating. S2. Coating: Coat the film passing above the evaporation boat (4). S3. Cooling: Cool the film during coating. S3. Winding: After the film is coated to form a metallized film, wind the metallized film.

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