Production line for double-sided spraying and double-sided hot laminating of metal coiled material

Abstract

The utility model discloses a production line for double-sided spraying and double-sided thermal film coating of a metal coiled material, which relates to the technical field of metal coiled material processing and production equipment and comprises an uncoiling device, a cleaning and passivating device, an electrostatic powder spraying device, a curing device, a thermal film coating device, a protective film coating device and a coiling device which are sequentially arranged, the structure of a traditional hot film laminating device is changed, double film releasing mechanisms are arranged, single-face hot film laminating production of a traditional single hot film laminating device is converted into double-face hot film laminating production of a single hot film laminating device at the same time, investment of the hot film laminating device is reduced, meanwhile, heating of the hot film laminating device is omitted, the hot film laminating device is arranged behind a drying oven, and the production efficiency is improved. The heating temperature requirements of metal coiled material spraying curing and hot film coating are met through heat of the curing oven, one-line multiple purposes of metal coiled material spraying and hot film coating production are achieved, and the beneficial effects that the production cost is reduced, energy consumption resources are saved, pollution is reduced, and the surface quality of the metal coiled material is improved are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the metal coiled material processing production technical field, more specifically relates to a kind of for metal coiled material double-sided spray and double-sided hot film production technical field, especially a kind of for metal coiled material double-sided spray and double-sided hot film production line. BACKGROUND

[0002] The spraying or hot film covering of metal coiled material refers to the spraying or laminating various powder coatings or polymer composite films on the surface of metal coiled material. Since it is coiled material with surface coating or hot film covering completed in a metallurgical plant, it can be directly processed into products by users, so it is also called pre-coated coiled material. It has good strength and processing performance of metal material, and also has excellent decorative performance, corrosion resistance, weather resistance, pollution resistance and other properties of polymer film, so it is widely used in manufacturing industries such as building, household appliances and steel structure, and has good development prospects.

[0003] In the continuous production of spraying or hot film covering of metal coiled material, separate production lines are generally set up according to different applications of coiled material. However, the surface processing production of metal coiled material generally has universality. For example, spraying and hot film covering are two different surface processing methods, and different spraying devices and hot film covering devices are generally set up in production. However, currently, the traditional spraying and hot film covering production line is designed separately, and generally single-sided spraying or single-sided hot film covering is set up. There is almost no production line that can simultaneously perform spraying or hot film covering, or even double-sided spraying and double-sided hot film covering. Currently, the traditional hot film covering machine generally heats the film covering roller. The heat on the surface of the roller is conducted to the hot melt adhesive through the polymer film layer. The temperature of the roller surface must be much higher than the melting point temperature of the hot melt adhesive. If the temperature of the roller surface is too low, the hot melt adhesive will not melt completely, and the bonding will not be firm. The temperature of the roller surface must reach more than 150 degrees to make the hot melt adhesive melt completely. At this time, the polymer film also deforms due to high temperature, and orange peel and other undesirable phenomena occur on the surface of the coated plate. Moreover, a hot film covering machine can only meet the demand of single-sided hot film covering. Therefore, in order to meet the diversified surface processing demand of metal coiled material, reduce the investment cost of production line, optimize the production equipment and production line of spraying and hot film covering machine, and develop a production line that can meet multiple demands, reduce equipment investment, save energy consumption and improve the surface processing quality of metal coiled material, a double-sided spraying and double-sided hot film covering production line is developed. SUMMARY

[0004] In order to solve the above production problems and overcome the defects of the prior art, the utility model is a kind of for metal coiled material double-sided spray and double-sided hot film production line.

[0005] The utility model discloses a production line for double -sided spraying and double -sided hot film covering of metal coiled material, including the uncoiler, cleaning passivation device, electrostatic powder spraying device, solidification device, hot film covering device, covering protective film device and winding device who sets gradually,

[0006] The uncoiler comprises an uncoiler A, an inlet shear, an uncoiler B, a pinch roll, a seam machine, a burr press, a first tension machine and an inlet loop connected in sequence, wherein the uncoiler is provided with two, one standby and one in use.

[0007] The cleaning passivation device comprises a second tension machine, an alkali cleaning device, a water cleaning device, a passivation device, a passivation drying device and a first deviation rectifying machine connected in sequence.

[0008] The electrostatic powder spraying device comprises a third tension machine, a front electrostatic powder spraying device and a back electrostatic powder spraying device.

[0009] The solidification device comprises a front infrared solidification device, a back infrared solidification device, an oven, an air cooling device and a water cooling roller.

[0010] The hot film covering device comprises a coating machine, a hot film covering machine, a water cooling device, a second deviation rectifying machine and a fourth tension machine, wherein the hot film covering machine is arranged after the oven.

[0011] The protective film covering device comprises a third deviation rectifying machine, a sixth tension machine and a connected protective film covering machine and film press, wherein the film press is arranged after the protective film covering machine.

[0012] The winding device comprises a fifth tension machine, an outlet loop, a bridge roller, an outlet shear and a winding machine, wherein the outlet loop is connected with the third deviation rectifying machine, and the winding machine is used for winding the finished metal coiled material into a roll.

[0013] The production line is arranged in a multi-layer meandering layout, the uncoiler and the winding device are arranged on the same horizontal line, the inlet loop and the outlet loop are arranged side by side on the same end, the inlet loop is connected with the first tension machine and the second tension machine in front and back respectively, the outlet loop is connected with the fifth tension machine and the third deviation rectifying machine in front and back respectively, the hot film covering machine is arranged at the outlet of the oven and connected with the water cooling device, the back electrostatic spraying device and the front electrostatic spraying device in the electrostatic powder spraying device are arranged in a meandering layout, and each is connected with an infrared solidification device, so that the production line can be switched seamlessly between double-sided spraying and double-sided hot film covering, the protective film covering device is arranged before the winding device, and the surface of the metal coiled material after spraying or hot film covering is protected from secondary pollution and damage.

[0014] The cleaning and passivation device is directly connected with the electrostatic powder spraying device through a first deviation rectifying machine and a third tension machine, the electrostatic powder spraying device is sequentially connected with a coating machine, a curing device and a hot film coating device, the curing device is arranged between the electrostatic powder spraying device and the hot film coating device, and the curing device can be used as a double-sided spraying and curing device and a double-sided hot film coating heating device.

[0015] The alkali cleaning device and the water cleaning device respectively include alkali liquid soaking and brushing and water soaking and brushing, so that oil and grease residues and residual alkali liquid on the surface of the metal coil are removed, and the surface of the metal coil is convenient for spraying and hot film coating.

[0016] The coating machine is respectively provided with back side material carrying rollers and back side coating rollers and front side material carrying rollers and front side coating rollers, so that the metal coil is convenient for double-sided glue coating and hot film coating.

[0017] The hot film coating machine is provided with a rack, the rack is provided with upper and lower film coating rollers, one side of the rack is provided with a supporting roller, the upper side of the rack is provided with a front side film placing mechanism, the lower side of the rack is provided with a back side film placing mechanism, the right upper side of the rack is provided with a front side flattening roller, the right lower side of the rack is provided with a back side flattening roller, the metal coil is supported by the supporting roller and passes between the upper and lower film coating rollers, the front and back side film placing mechanisms are respectively provided with two roller barrels for mounting and connecting a front film and a new film, a polymer film roller is mounted on the roller barrels, the polymer film rotates through the roller barrels of the film placing mechanisms, is flattened through the front and back side flattening rollers respectively and is pressed and coated on the front and back sides of the metal coil through the upper and lower film coating rollers.

[0018] The production line for double-sided spraying and double-sided hot film coating of the metal coil changes the structural arrangement of the traditional hot film coating machine, converts the single-sided hot film coating production of the traditional single hot film coating equipment into double-sided hot film coating production of the single hot film coating equipment through the double film placing mechanisms, reduces the investment in the hot film coating equipment, saves the roller heating arrangement of the hot film coating device, uses an oven to heat the metal coil instead of the traditional roller heating polymer film, makes the glue coating on the surface of the metal coil more uniform, the surface temperature more uniform, improves the adhesion and the utilization rate of the hot film coating, improves the surface processing quality and the production efficiency of the hot film coating, realizes the one-line multi-use of the spraying and hot film coating production of the metal coil, reduces the investment in the heating equipment, realizes the beneficial effects of reducing the production cost, saving energy resources and reducing environmental pollution. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1It is the production line layout schematic diagram for the double-sided spraying and double-sided hot film covering of the metal coiled material.

[0020] Figure 2 It is the production line schematic diagram for the double-sided spraying and double-sided hot film covering of the metal coiled material.

[0021] Figure 3 It is the structure schematic diagram of the hot film covering machine.

[0022] Figure 4 It is the coating machine mechanism schematic diagram.

[0023] Mark explanation: 1. Uncoiling device, 2. Cleaning and passivating device, 3. Electrostatic powder spraying device, 4. Solidification device, 5. Hot film covering device, 6. Protective film covering device, 7. Coiling device;

[0024] 101A. Uncoiler, 101B. Uncoiler B, 102. Inlet shear, 103. Pinch roll, 104. Stitcher, 105. Deburring press, 106. First tension machine, 107. Inlet loop, 201. Second tension machine, 202. Alkaline cleaning device, 203. Water cleaning device, 204. Passivating device, 205. Passivating drying device, 206. First deviation rectifying machine, 301. Third tension machine, 302. Back electrostatic powder spraying device, 303. Front electrostatic powder spraying device, 401. Back infrared solidification device, 402. Front infrared solidification device, 403. Oven, 404. Air cooling device, 405. Water cooling roller, 501. Hot film covering machine, 502. Water cooling device, 503. Second deviation rectifying machine, 504. Fourth tension machine, 505. Coating machine, 601. Third deviation rectifying machine, 602. Sixth tension machine, 603. Protective film covering machine, 604 Film pressing machine, 701. Fifth tension machine, 702. Outlet loop, 703. Outlet shear, 704. Bridge roller, 705. Coiling machine;

[0025] 2021. Alkali immersion, 2022. Alkali brushing, 2031. Water brushing, 2032. Water immersion, 5011 Front film placing mechanism, 5012. Back film placing mechanism, 5013. Upper film covering roller, 5014. Lower film covering roller, 5015. Front flattening roller, 5016. Back flattening roller, 5017. Supporting roller, 5018, Lifting air cylinder, 5019. Rack, 5020. Magnetic powder brake, 5021. Roller, 5051. Front coating roller, 5052. Back coating roller, 5053. Back material roller, 5054. Front material roller. DETAILED DESCRIPTION

[0026] The production line for the double-sided spraying and double-sided hot film covering of the metal coiled material of the utility model will be further explained in combination with the drawings.

[0027] The utility model relates to a production line for double-sided spraying and double-sided hot film covering of metal coiled material, which comprises unwinding device 1, cleaning and passivating device 2, electrostatic powder spraying device 3, curing device 4, hot film covering device 5, protective film covering device 6 and winding device 7 arranged in sequence. Figures 1 to 3

[0028] As shown in Figure 1 and Figure 2 , the production line for double-sided spraying and double-sided hot film covering of metal coiled material comprises unwinding device 1, cleaning and passivating device 2, electrostatic powder spraying device 3, curing device 4, hot film covering device 5, protective film covering device 6 and winding device 7 arranged in sequence; the unwinding device 1 comprises unwinders A 101A, inlet shears 102, unwinders B 101B, pinch rollers 103, seamers 104, burr pressing machines 105, first tensioners 106 and inlet loops 107 connected in sequence, wherein the unwinders are arranged in two, one standby and one in use; the cleaning and passivating device 2 comprises second tensioners 201, caustic washing device 202, water washing device 203, passivating device 204, passivating drying device 205 and first deviation correctors 206 connected in sequence; the electrostatic powder spraying device 3 comprises third tensioners 301, front electrostatic powder spraying device 303 and back electrostatic powder spraying device 302; the curing device 4 comprises front infrared curing device 402, back infrared curing device 401, oven 403, air cooling device 404 and water cooling roller 405; the hot film covering device 5 comprises coater 505, hot film covering machine 501, water cooling device 502, second deviation corrector 503 and fourth tensioner 504, wherein the hot film covering machine 501 is arranged after the oven 403; the protective film covering device 6 comprises third deviation corrector 601, sixth tensioner 602, protective film covering machine 603 and film pressing machine 604 connected, wherein the film pressing machine 604 is arranged after the protective film covering machine 603; the winding device 7 comprises fifth tensioner 701, outlet loop 702, overbridge roller 704, outlet shears 703 and winding machine 705, wherein the outlet loop 702 is connected to the third deviation corrector 601, and the winding machine 705 is used for winding the finished metal coiled material into a roll.

[0029] It should be noted that, in the utility model, the production line is different from the production line provided with double-sided spraying and the production line provided with double-sided hot film covering. Figure 1 Figure 2 ​​The production line layout is a multi-layer meandering layout, the unwinding device 1 and the winding device 7 are arranged on the same horizontal line, the inlet loop 107 and the outlet loop 702 are arranged side by side on the same end, the metal coil is transported across the multi-layer buffer, the equipment occupies less area, the speed of the production line is adjusted, and the like, the inlet loop 107 is connected with the first tensioner 106 and the second tensioner 201 respectively, the required tension between the inlet loop 107 and the front-end unwinding device and the rear-end cleaning device is balanced, the outlet loop 702 is connected with the fifth tensioner 701 and the third deviation rectifier 601 respectively, the required tension and deviation rectification of the coil between the outlet loop 702 and the curing device 4 are provided, the center is entered into the winding device 7, the hot laminating machine 501 is arranged at the outlet of the oven 403, the surface temperature of the metal coil is ensured, the hot laminating machine 501 is convenient for hot laminating and laminating operation, and the water cooling device 502 is connected, the water cooling device 502 is provided with two groups of water cooling rollers, is connected with a water cooling section circulating system, and is used for cooling the surface temperature of the hot laminated metal coil, the back electrostatic spraying device 302 and the front electrostatic spraying device 303 are arranged in a meandering manner, the requirements of double-sided spraying of the production line are met, complex conversion equipment and complex conversion operations are reduced, operation errors are avoided, the length of the production line is shortened, and the area occupied by the production line is reduced, and each is connected with an infrared curing device, the sprayed powder of the metal coil is ensured to be instantaneously leveled and cured, the loss of the powder coating is reduced, the seamless switching between the double-sided spraying and the double-sided hot laminating production operation of the production line is ensured, and the protective film device 6 is arranged before the winding device 7, mainly a layer of protective film is coated on the surface of the metal coil product, and the surface of the metal coil after spraying or hot laminating is protected from secondary pollution and damage.

[0030] Further, as Figure 2 The cleaning and passivation device 2 is directly connected with the electrostatic powder spraying device 3 through the first deviation rectifier 106 and the third tensioner 301, the electrostatic powder spraying device 3 is sequentially connected with the coating machine 505, the curing device 4, and the hot laminating device 5, the curing device 4 is arranged between the electrostatic powder spraying device 3 and the hot laminating device 5, the temperature parameter of the oven 403 is controlled, and the curing device 4 can be used as a double-sided spraying curing device and a double-sided hot laminating heating device respectively, the hot laminating machine 501 is simplified, and energy consumption is saved. The alkali washing device 202 and the water washing device 203 respectively include alkali immersion 2021 and brushing and water brushing 2031 and immersion, surface cleaning is performed according to the surface treatment procedures of the alkali immersion 2021, the alkali brushing 2022, the water brushing 2031, and the water immersion 2032 in sequence, oil and residue and residual alkali on the surface of the metal coil are removed, and the surface spraying and hot laminating processing of the metal coil are facilitated.

[0031] As Figure 3As shown, the thermal laminating machine 501 is provided with a frame 5019, on which an upper laminating roller 5013 and a lower laminating roller 5014 are provided. A support roller 5017 is provided on one side of the frame 5019 to determine the passing height of the conveyed metal roll. A front film feeding mechanism 5011 is provided on the upper side, and a back film feeding structure 5012 is provided on the lower side. A front flattening roller 5015 is provided on the upper right, and a back flattening roller 5016 is provided on the lower right. Before the laminating roller presses the film, the polymer film is unfolded by the flattening roller, which has the function of flattening the polymer film. The metal roll is supported by the support roller 5017 and passes between the upper coating roller 5013 and the lower coating roller 5014. The upper coating roller 5013 is controlled by a lifting cylinder 5018 to move up and down, pressing the film onto the surface of the metal roll. The front and back film-laying mechanisms 5012 are each equipped with two rollers 5021. The rollers 5021 are tightened by manually injecting compressed air to tighten the inner hole of the film. Two magnetic powder brakes 5020 are provided to maintain the tension of the film and are used to install and connect the previous film and the new film. The polymer film roller is mounted on the rollers 5021, and the polymer film passes through the rollers 5014 of the film-laying mechanism. 21. The roll is rotated and then flattened by the front flattening roller 5015 and the back flattening roller 5016 respectively, and then pressed onto the front and back of the metal coil by the upper coating roller 5013 and the lower coating roller 5014. A lifting cylinder 5018 is provided above the upper coating roller 5013 and the lower coating roller 5014. The lifting cylinder 5018 is fixedly installed on the frame 5019, and its piston rod is connected to the upper coating roller 5013 and the lower coating roller 5014, so that the upper coating roller 5013 and the lower coating roller 5014 can move up and down, which facilitates the coating and pressing of the metal coil.

[0032] like Figure 4 As shown, the coating machine 505 is equipped with a back-side material roller 5053 and a back-side coating roller 5052, as well as a front-side material roller 5054 and a front-side coating roller 5051, which facilitates double-sided adhesive coating of metal coils and makes the heat-coated film adhere better.

[0033] When the production line is in production, it sequentially passes through the uncoiler A 101A→the entry shears 102→the uncoiler B 101B→the pinch roll 103→the seam machine 104→the burr pressing machine 105→the first tension machine 106→the entry loop 107→the second tension machine 201→the alkali immersion 2021→the alkali brushing 2022→the clean water brushing 2031→the clean water immersion 2032→the passivation device 204→the passivation drying device 205→the first deviation rectifying machine 206→the third tension machine 301→the back electrostatic powder spraying device 302→the back infrared curing device 401→the air cooling device 404→the water cooling roller 405→the coating machine 505→the front electrostatic powder spraying device 303→the front infrared curing device 402→the oven 403→the hot laminating machine 501→the water cooling device 502→the second deviation rectifying machine 503→the fourth tension machine 504→the fifth tension machine 701→the exit loop 702→the third deviation rectifying machine 601→the sixth tension machine 602→the protective film laminating machine 603→the film pressing machine 604→the exit shears 703→the bridge roller 704→the winding machine 705. When the production line is used for double-sided spraying production of metal coils, the coating machine 505 and the hot laminating machine 501 do not run with material feeding and are only used for line conveying; when single-sided spraying production is performed, one set of electrostatic powder spraying devices can be used for spraying. When the production line is used for double-sided hot laminating production of metal coils, the back electrostatic powder spraying device 302, the infrared curing device, the air cooling device 404, the water cooling roller 405, and the front electrostatic powder spraying device 303 do not run with material feeding and are only used for line conveying; when single-sided hot laminating production is performed, the hot laminating machine can be used with a film placing mechanism.

[0034] In summary, whether it is double-sided spraying, double-sided hot laminating, single-sided spraying, or single-sided hot laminating, the production line can meet the production requirements. The production line can be used alone or in combination to obtain metal coils with different surface processing effects. When the double-sided spraying production mode is used alone, a low-carbon and environmentally friendly continuous electrostatic powder spraying metal coil with high processability, high scratch resistance, super corrosion resistance, fine coating, zero pollution emission, and significantly improved production efficiency can be obtained. When the double-sided hot laminating production mode is used alone, a hot laminating metal coil with rich and diverse patterns, certain weather resistance, super acid and alkali resistance, and corrosion resistance can be obtained at low cost, meeting the requirements of steel plants, power plants, chemical plants, livestock breeding, and other application fields that require acid and alkali resistance and corrosion resistance.

[0035] The utility model discloses change the structure setting of traditional hot laminating machine 501, through setting up double film mechanism, by traditional single hot laminating equipment carries out single -sided hot laminating production conversion to single hot laminating equipment simultaneously carries out double -sided hot laminating production, reduces the investment of hot laminating equipment, spares the roller heating setting of hot laminating device 5, with oven 403 heating metal coil instead of traditional roller heating polymer film, make metal coil surface gluing flow flat more uniform, the surface temperature is more uniform, has improved the adhesion and use rate of hot laminating, has improved the surface processing quality and production efficiency of hot laminating, realizes metal coil spraying and hot laminating production's one line multipurpose, reduces the investment of heating equipment, realizes the beneficial effect of reducing production cost, saving energy resources, reducing environmental pollution.

[0036] The above only is the preferred embodiment of the utility model, and does not therefore limit the implementation and protection scope of the utility model, and for those skilled in the art, it should be realized that the scheme obtained by equivalent replacement and obvious change of the utility model specification and drawing contents should be contained in the protection scope of the utility model.

Claims

1. A production line for double-sided spray coating and double-sided hot lamination of metal coil, characterized in that: The production line comprises, in sequence, an unwinding device, a cleaning and passivation device, an electrostatic powder spraying device, a curing device, a hot film coating device, a protective film coating device, and a winding device. The unwinding device comprises, in sequence, an unwinder A, an inlet shear, an unwinder B, a pinch roll, a seam machine, a burr press, a first tensioner, and an inlet loop. The cleaning and passivation device comprises, in sequence, a second tensioner, an alkali cleaning device, a water cleaning device, a passivation device, a passivation drying device, and a first deviation rectifier. The electrostatic powder spraying device comprises a third tensioner, a front electrostatic powder spraying device, and a back electrostatic powder spraying device. The curing device comprises a front infrared curing device, a back infrared curing device, an oven, an air cooling device, and a water cooling roller. The hot film coating device comprises a coating machine, a hot film coating machine, a water cooling device, a second deviation rectifier, and a fourth tensioner. The protective film coating device comprises a third deviation rectifier, a sixth tensioner, a protective film coating machine, and a film press. The winding device comprises a fifth tensioner, an outlet loop, a bridge roller, an outlet shear, and a winding machine.

2. The line for the double-sided spray coating and double-sided hot lamination of a metal web according to claim 1, characterized in that: The production line is arranged in a multi-layered meandering layout, the unwinding device and the winding device are arranged on the same horizontal line, the inlet loop and the outlet loop are arranged side by side on the same end, the inlet loop is connected to the first tensioner and the second tensioner, the outlet loop is connected to the fifth tensioner and the third deviation rectifier, the hot film coating machine is arranged at the outlet of the oven and connected to the water cooling device, the back electrostatic powder spraying device and the front electrostatic powder spraying device are arranged in a meandering layout, and each is connected to an infrared curing device, thereby ensuring seamless switching between double-sided spraying and double-sided hot film coating.

3. The line for the double-sided spray coating and double-sided hot lamination of a metal coil according to claim 1, characterized in that: The cleaning and passivation device is directly connected to the electrostatic powder spraying device through the first deviation rectifier and the third tensioner, the electrostatic powder spraying device is connected to the coating machine, the curing device, and the hot film coating device in sequence, and the curing device is arranged between the electrostatic powder spraying device and the hot film coating device and can be used as a double-sided spraying curing device and a double-sided hot film coating heating device.

4. The line for double-sided spray coating and double-sided hot lamination of a metal web according to claim 1, characterized in that: The alkali cleaning device and the water cleaning device comprise alkali immersion and brushing and water brushing and immersion, respectively, thereby ensuring that the surface of the metal coil is cleaned of oil residues and residual alkali and facilitating surface spraying and hot film coating of the metal coil.

5. The production line for double-sided spray coating and double-sided hot lamination of metal coil according to claim 1, characterized in that: The coating machine is provided with a back material roller and a back coating roller and a front material roller and a front coating roller, thereby facilitating double-sided glue coating and hot film coating of the metal coil.

6. The production line for double-sided spray coating and double-sided hot lamination of metal coil according to claim 1, characterized in that: The hot laminating machine is provided with a rack, the rack is provided with an upper laminating roller and a lower laminating roller, one side of the rack is provided with a supporting roller, the upper side is provided with a front film placing mechanism, the lower side is provided with a back film placing mechanism, the right upper side is provided with a front flattening roller, the right lower side is provided with a back flattening roller, the metal coil is supported by the supporting roller and passes between the upper laminating roller and the lower laminating roller, the front film placing mechanism and the back film placing mechanism are respectively provided with two roller barrels for connecting the front film and the new film, the polymer film roller is installed on the roller barrel, the polymer film rotates through the roller barrel of the film placing mechanism, is flattened through the front flattening roller and the back flattening roller respectively, and is pressed and laminated on the front surface and the back surface of the metal coil through the upper laminating roller and the lower laminating roller; wherein the upper laminating roller and the lower laminating roller are provided with a lifting cylinder, the lifting cylinder is fixedly installed on the rack, the piston rod of the lifting cylinder is connected with the upper laminating roller and the lower laminating roller, the upper laminating roller and the lower laminating roller realize up-down movement, and the film laminating and pressing of the metal coil are facilitated.

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