A supercritical foaming composite heat preservation type lunch box aluminum foil production device

Abstract

This invention relates to the field of aluminum foil lunch box production technology. The invention relates to a supercritical foaming composite insulated lunch box aluminum foil production device, comprising a box body. An installation frame is fixedly mounted on the upper surface of the box body. Guide rollers are symmetrically rotated on both the front and rear sides of the installation frame. This invention uses an anti-deviation limiting component on the feeding side of the installation frame. A driving device drives a gear to rotate, causing two sets of racks to move synchronously in opposite directions along the installation plate. This allows the limiting wheels on both sides to roll and limit the aluminum foil from both edges, constraining its lateral position before it enters the coating area. This prevents the aluminum foil from deviating during high-speed transport. Simultaneously, the circular block at the end of the telescopic rod cooperates with a tension spring inside the installation cylinder, causing the limiting wheels to elastically float and press against the edge of the aluminum foil. This accommodates minor vibrations during aluminum foil transport while avoiding hard compression that could deform the aluminum foil, ensuring uniformity and consistency in double-sided coating.

Description

Technical Field

[0001] This invention belongs to the field of aluminum foil lunch box production technology, specifically relating to a supercritical foaming composite thermal insulation aluminum foil lunch box production device. Background Technology

[0002] With increasing environmental awareness and the rapid development of the catering industry, the demand for disposable lunch boxes continues to grow. Traditional foamed plastic lunch boxes are gradually being restricted due to their difficulty in degradation and environmental pollution. Supercritical fluid foaming composite insulated lunch boxes made of aluminum foil are becoming the mainstream alternative to traditional foamed plastic lunch boxes due to their advantages such as light weight, good insulation, recyclability, and environmental friendliness. These lunch boxes typically use aluminum foil as the base material, and a foam layer is laminated onto the aluminum foil surface using a supercritical fluid foaming process. During production, the aluminum foil needs to be oiled to ensure lubrication, demolding properties, and surface quality during subsequent lamination and stamping processes.

[0003] In existing technologies, the aluminum foil for insulated lunch boxes produced by supercritical foaming composites has the following shortcomings in the oiling process: First, the aluminum foil lacks an effective centering and limiting mechanism during high-speed conveying. The aluminum foil is prone to lateral deviation and misalignment between the guide roller and the coating roller, resulting in inaccurate oiling position and uneven coating. In severe cases, it can also cause wrinkles or tears at the edges of the aluminum foil, affecting product quality and yield. Secondly, most oiling devices use single-sided oiling or simple roller coating methods, resulting in low oil utilization. Excess oil is directly dripped and collected as waste oil, lacking an effective oil recycling and filtration reuse mechanism, which leads to oil waste and increased production costs, as well as environmental pollution problems caused by waste oil discharge. Third, after long-term continuous oiling operations, the coating roller surface is prone to the adhesion of dried oil stains, aluminum powder and impurities. If not cleaned in time, it will lead to uneven oil coating thickness, oil film breaks or streaks, or even scratches on the aluminum foil surface. Existing equipment mostly relies on manual wiping and cleaning after shutdown, which is cumbersome and inefficient, seriously affecting the continuous operation of the production line and the stability of product quality. Summary of the Invention

[0004] The purpose of this invention is to provide a simple and rationally designed supercritical foaming composite aluminum foil production device for insulated lunch boxes in order to solve the above problems.

[0005] The present invention achieves the above objectives through the following technical solutions: A supercritical foaming composite aluminum foil production device for insulated lunch boxes includes a housing. A mounting frame is fixedly installed on the upper surface of the housing. Guide rollers are symmetrically rotatably arranged on both the front and rear sides of the mounting frame. Two sets of coating rollers are rotatably connected to the inner side of the mounting frame. A driving device is fixedly installed on the outer side of the mounting frame. A second guide roller is rotatably connected to the inner side of the mounting frame and is located directly above the coating rollers. An oil collection hopper is fixedly installed on the inner bottom side of the mounting frame and is located directly below the coating rollers. The outlet of the oil collection hopper is connected to the interior of the housing. A filter plate is provided on the inner side of the housing. An oiling assembly for double-sided oiling of the aluminum foil is installed on the inner side of the mounting frame. An anti-deviation limiting assembly is installed on the side of the mounting frame, located on the feed side of the coating rollers, to center and limit the conveying of the aluminum foil to prevent deviation. A cleaning and scraping assembly for automatic descaling of the rollers is installed on the inner side of the mounting frame.

[0006] As a further optimization of the present invention, the oiling assembly includes an oil storage tank fixedly installed on the outside of the mounting frame. The oil outlet of the oil storage tank is fixedly connected to a conveying pipe. The end of the conveying pipe is fixedly connected to an oil pump. The oil outlet of the oil pump is fixedly connected to a diverter pipe. Two sets of spray pipes are symmetrically installed on the inner side of the mounting frame, and the two sets of spray pipes are respectively located above two sets of coating rollers. The outer surface of the spray pipe is provided with several nozzles.

[0007] As a further optimization of the present invention, the oiling assembly further includes a return pump fixedly installed on the outside of the housing, and the input end of the return pump is connected to the inside of the housing. The side of the oil storage tank is fixedly connected to a return pipe, and one end of the return pipe is fixedly connected to the output end of the return pump.

[0008] As a further optimization of the present invention, the anti-deviation limiting component includes a mounting plate fixedly installed on the side of the mounting frame. Two sets of racks are symmetrically slidably connected to the inner side of the mounting plate. A second driving device is fixedly installed on the mounting plate. A gear is fixedly connected to the output end of the second driving device, and the gear meshes with the two sets of racks. A connecting plate is fixedly connected to the end of each set of racks. A mounting cylinder is fixedly connected to the connecting plate, and a through hole for the mounting cylinder to pass through is opened on the side of the mounting frame.

[0009] As a further optimization of the present invention, the anti-deviation limiting component further includes a telescopic rod slidably connected to the inner side of the mounting cylinder. A wheel frame is fixedly connected to the end of the telescopic rod, and a limiting wheel is rotatably connected to the inner side of the wheel frame. A round block is fixedly connected to the other end of the telescopic rod. A tension spring is fixedly connected to the inner side of the mounting cylinder, and the other end of the tension spring is fixedly connected to the side of the round block.

[0010] As a further optimization of the present invention, the upper sides of both sets of racks are fixedly connected with limit blocks, and the inner side of the mounting plate is symmetrically provided with limit grooves, and the limit grooves and limit blocks are slidably engaged.

[0011] As a further optimization of the present invention, the cleaning and scraping assembly includes a mounting groove formed inside the mounting frame, a sliding rod fixedly connected to the inner wall of the mounting groove, a movable plate and a fixed plate slidably connected to the surface of the sliding rod, four sets of tension springs are provided between the movable plate and the fixed plate, a scraper is fixedly connected to the side of the fixed plate, a driving device is fixedly installed on the inner wall of the mounting groove, and a dustproof telescopic sleeve is provided at the opening of the mounting groove.

[0012] As a further optimization of the present invention, one end of the four sets of tension springs is fixedly connected to the side of the movable plate, and the other end is fixedly connected to the side of the fixed plate.

[0013] As a further optimization of the present invention, the output end of the driving device three is fixedly connected to the side of the moving plate, one side of the dustproof telescopic sleeve is fixedly connected to the inner wall of the mounting groove, and the other side of the dustproof telescopic sleeve is fixedly connected to the side of the fixed plate.

[0014] As a further optimization of the present invention, the filter plate is symmetrically fixedly connected with inserts on both sides, the side of the housing is symmetrically provided with slots, and the slots are slidably engaged with the inserts. The side of the inserts is provided with screw holes, and the side of the housing is provided with locking bolts, and the locking bolts are threadedly engaged with the screw holes.

[0015] 1. The beneficial effects of the present invention are as follows: By setting an anti-deviation limiting component on the feeding side of the mounting frame, the drive device two drives the gear to rotate, driving two sets of racks to move synchronously in opposite directions along the mounting plate, so that the limiting wheels on both sides roll and limit the aluminum foil from the two edges. Before the aluminum foil enters the oiling area, its lateral position is constrained, preventing the aluminum foil from deviating during high-speed conveying. At the same time, the round block at the end of the telescopic rod cooperates with the tension spring in the mounting cylinder, so that the limiting wheel fits the edge of the aluminum foil with elastic floating pressure. This can not only adapt to the slight vibration during the conveying of the aluminum foil, but also avoid the deformation of the aluminum foil caused by hard extrusion, ensuring the uniformity and consistency of double-sided oiling.

[0016] 2. The beneficial effects of the present invention are as follows: By setting up an oiling assembly, and utilizing the oil supply circuit composed of an oil storage tank, an oil pump, a distribution pipe, and a spray pipe, in conjunction with a nozzle located above the coating roller, it is possible to achieve uniform oiling of both sides of the aluminum foil, ensuring the lubrication and isolation effect of the aluminum foil surface during the supercritical foaming composite process. At the same time, through the setting of a return pump and a return pipe, the residual oil filtered by the filter plate at the bottom of the tank is pumped back to the oil storage tank, forming a closed-loop oil circulation system. This not only significantly reduces oil loss and costs during the production process, but also avoids environmental pollution caused by direct discharge of waste oil.

[0017] 3. The beneficial effects of the present invention are as follows: by setting up a cleaning and scraping assembly, the driving device three pushes the moving plate to move along the slide bar. Under the elastic force of the tension spring two, the scraper on the fixed plate is always in close contact with the surface of the coating roller. As the coating roller rotates, it can automatically scrape off the dried oil stains, aluminum powder and impurities attached to the roller surface, preventing the accumulation of dirt from affecting the uniformity of oiling or damaging the surface of the aluminum foil. Attached Figure Description

[0018] Figure 1 This is an exploded view of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the entire housing and mounting frame of the present invention; Figure 3 This is a schematic diagram of the oiling assembly of the present invention; Figure 4 This is an assembly diagram of the anti-deviation limiting component of the present invention; Figure 5 This is a cross-sectional view of the mounting bracket of the present invention; Figure 6 This is the present invention. Figure 5 Enlarged view of point A in the middle; Figure 7 This is an exploded view of the filter plate of the present invention.

[0019] In the diagram: 1. Housing; 2. Mounting frame; 3. Guide roller one; 4. Coating roller; 5. Drive unit one; 6. Guide roller two; 7. Oil collection hopper; 8. Filter plate; 9. Coating assembly; 901. Oil storage tank; 902. Delivery pipe; 903. Oil pump; 904. Diverter pipe; 905. Spray pipe; 906. Nozzle; 907. Return pump; 908. Return pipe; 10. Anti-deviation limiting assembly; 101. Mounting plate; 102. Rack; 103. Drive unit two; 104. Gear; 10 5. Connecting plate; 106. Mounting cylinder; 107. Telescopic rod; 108. Limiting wheel; 109. Round block; 110. Tension spring one; 111. Limiting block; 112. Limiting groove; 12. Cleaning and scraping assembly; 120. Mounting groove; 121. Slide rod; 122. Moving plate; 123. Fixing plate; 124. Tension spring two; 125. Scraper; 126. Drive device three; 127. Dustproof telescopic sleeve; 13. Insert strip; 14. Slot; 15. Screw hole; 16. Locking bolt. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0021] Example: Please refer to Figure 1 and Figure 2A production device for supercritical foamed composite insulated aluminum foil lunch boxes includes a housing 1, which serves as the foundation for the entire machine and an oil collection space. A mounting frame 2 is fixedly installed on the upper surface of the housing 1, providing a mounting carrier and support foundation for subsequent components. Guide rollers 3 are symmetrically rotatably mounted on both the front and rear sides of the mounting frame 2, guiding the aluminum foil. Two sets of coating rollers 4 are rotatably connected to the inner side of the mounting frame 2, respectively applying oil to both sides of the aluminum foil. A drive device 5 is fixedly installed on the outer side of the mounting frame 2, providing rotational power to the two sets of coating rollers 4. A second guide roller 6 is rotatably connected to the inner side of the mounting frame 2, positioned directly above the coating rollers 4, guiding the coated aluminum foil. An oil collection hopper 7 is fixedly installed on the bottom side of the conveying and mounting frame 2, and the oil collection hopper 7 is located directly below the coating roller 4. The oil collection hopper 7 is used to collect excess oil dripping from the coating roller 4. The outlet of the oil collection hopper 7 is connected to the inside of the box 1, so that the recovered oil flows into the box 1 for sedimentation and filtration. A filter plate 8 is provided on the inside of the box 1. The filter plate 8 intercepts and filters aluminum powder and impurities in the recovered oil. An oiling component 9 for double-sided oiling of aluminum foil is installed on the inside of the mounting frame 2. An anti-deviation limiting component 10 is installed on the side of the mounting frame 2 and on the feed side of the coating roller 4. The anti-deviation limiting component 10 is used to center and limit the conveying of aluminum foil to prevent deviation. A cleaning and scraping component 12 for automatic descaling of the roller is installed on the inside of the mounting frame 2.

[0022] Please see Figure 2 and Figure 3 The oiling assembly 9 includes an oil storage tank 901 fixedly installed on the outside of the mounting frame 2. The oil storage tank 901 is used to store stamping oil and provide an oil source for the oiling operation. The oil outlet of the oil storage tank 901 is fixedly connected to a conveying pipe 902, which conveys the oil in the oil storage tank 901 to the outside. The end of the conveying pipe 902 is fixedly connected to an oil pump 903, which provides power for the flow of the oil. The oil outlet of the oil pump 903 is fixedly connected to a diverter pipe 904, which divides the oil into two parts and distributes them to both sides. Two sets of spray pipes 905 are symmetrically installed on the inner side of the mounting frame 2. The spray pipes 905 convey the oil to the spraying position. The outer surface of the spray pipes 905 is provided with several nozzles 906, which atomize the oil and spray it onto the surface of the coating roller 4 to make the oil film distribution more uniform.

[0023] Please see Figure 3 The oiling assembly 9 also includes a return pump 907 fixedly installed on the outside of the housing 1, and the input end of the return pump 907 is connected to the inside of the housing 1 for extracting the filtered clean oil from the housing 1. A return pipe 908 is fixedly connected to the side of the oil storage tank 901. The return pipe 908 sends the recovered oil back to the oil storage tank 901 to form a closed loop circulation, and one end of the return pipe 908 is fixedly connected to the output end of the return pump 907.

[0024] Please see Figure 1 and Figure 4 The anti-deviation limiting component 10 includes a mounting plate 101 fixedly installed on the side of the mounting frame 2. Two sets of racks 102 are symmetrically slidably connected to the inner side of the mounting plate 101. The racks 102 convert rotational motion into linear reciprocating motion. A second drive device 103 is fixedly installed on the mounting plate 101. A gear 104 is fixedly connected to the output end of the second drive device 103, and the gear 104 meshes with the two sets of racks 102. The second drive device 103 provides power for the rotation of the gear 104. The mounting plate 101 provides a mounting base for the racks 102 and the gear 104. A connecting plate 105 is fixedly connected to the ends of the two sets of racks 102. A mounting cylinder 106 is fixedly connected to the connecting plate 105, and a through hole for the mounting cylinder 106 to pass through is opened on the side of the mounting frame 2.

[0025] Please see Figure 4 The anti-deviation limiting component 10 also includes a telescopic rod 107 slidably connected to the inner side of the mounting cylinder 106. A wheel frame is fixedly connected to the end of the telescopic rod 107, and a limiting wheel 108 is rotatably connected to the inner side of the wheel frame. The limiting wheel 108 rolls against the edge of the aluminum foil to limit movement and prevent friction damage to the aluminum foil. The telescopic rod 107 allows the limiting wheel 108 to elastically extend and retract within a certain range to adapt to fluctuations in the position of the aluminum foil. A round block 109 is fixedly connected to the other end of the telescopic rod 107. The round block 109 transmits spring force and limits extension and retraction. The sliding stroke of rod 107 is connected to a tension spring 110 fixedly on the inner side of mounting cylinder 106, and the other end of tension spring 110 is fixedly connected to the side of round block 109. Limiting blocks 111 are fixedly connected to the upper side of both sets of racks 102. Limiting grooves 112 are symmetrically opened on the inner side of mounting plate 101, and the limiting grooves 112 and limiting blocks 111 are slidably engaged. The engagement of limiting grooves 112 and limiting blocks 111 provides guidance and stroke restriction for the sliding of rack 102, preventing rack 102 from disengaging.

[0026] Please see Figure 5 and Figure 6The cleaning and scraping assembly 12 includes a mounting groove 120 formed inside the mounting bracket 2. The mounting groove 120 provides installation space and movement stroke for subsequent components. A slide rod 121 is fixedly connected to the inner wall of the mounting groove 120. A moving plate 122 and a fixed plate 123 are slidably connected to the surface of the slide rod 121. The slide rod 121 provides sliding guidance for the moving plate 122 and the fixed plate 123. Four sets of tension springs 124 are provided between the moving plate 122 and the fixed plate 123. The tension springs 124 provide elastic pressure to keep the scraper 125 in close contact with the roller surface. The scraper 125 is fixedly connected to the side of the fixed plate 123. The moving plate 122 transmits driving force, and the fixed plate 123 carries the scraper 125. The cutting edge of the scraper 125 is in contact with the coating. The wiping roller 4 scrapes away dirt by contact with the roller surface. The inner wall of the mounting groove 120 is fixedly installed with a drive device 3 126, which provides power for the reciprocating motion of the moving plate 122. The groove opening of the mounting groove 120 is provided with a dustproof telescopic sleeve 127, which prevents oil mist and impurities from entering the sliding pair of the slide rod 121. One end of the four sets of tension springs 2 124 is fixedly connected to the side of the moving plate 122, and the other end is fixedly connected to the side of the fixed plate 123. The output end of the drive device 3 126 is fixedly connected to the side of the moving plate 122. One side of the dustproof telescopic sleeve 127 is fixedly connected to the inner wall of the mounting groove 120, and the other side of the dustproof telescopic sleeve 127 is fixedly connected to the side of the fixed plate 123.

[0027] Please see Figure 7 The filter plate 8 is symmetrically fixedly connected with insert strips 13 on both sides. The side of the housing 1 is symmetrically provided with slots 14, and the slots 14 and insert strips 13 are slidably engaged. The insert strips 13 and slots 14 cooperate to realize the quick pull-out positioning of the filter plate 8. The side of the insert strips 13 is provided with screw holes 15. The side of the housing 1 is provided with locking bolts 16, and the locking bolts 16 are threadedly engaged with the screw holes 15. The locking bolts 16 are used to lock the filter plate 8 onto the housing 1.

[0028] In this embodiment, the drive device 3126 is a hydraulic cylinder, and the hydraulic cylinder is model MOB32-200, which can be replaced according to the actual situation.

[0029] In this embodiment, both drive device 5 and drive device 103 are servo motors, specifically Delta ECMA-C11020RS servo motors, which can be replaced as needed. Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires, and should select appropriate controllers according to actual conditions to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical connections between the various electrical components are completed in sequence. The detailed connection methods are well-known technologies in the field. The following mainly introduces the working principle and process, and will not describe the electrical control further.

[0030] It should be noted that during operation, the worker first guides the supercritical foamed composite thermal insulation aluminum foil substrate to be processed sequentially around the feed side guide roller 3, two sets of coating rollers 4, the top guide roller 6, and the discharge side guide roller 3, thus completing the positioning of the aluminum foil conveying path. Then, according to the actual width of the aluminum foil, the drive device 103 is activated, causing its output end to drive the gear 104 to rotate. Utilizing the meshing transmission between the gear 104 and the two sets of racks 102, the two sets of racks 102 move synchronously in opposite directions under the guiding and limiting action of the limiting block 111 and the limiting groove 112. The end connecting plate 105, mounting cylinder 106 and limiting wheel 108 are driven to adjust the spacing synchronously, so that the limiting wheels 108 on both sides are in contact with the left and right edges of the aluminum foil. At the same time, under the elastic action of the tension spring 110 inside the mounting cylinder 106, the round block 109 drives the telescopic rod 107 and the limiting wheel 108 to always maintain an elastic floating and pressing state. This can adapt to the slight up-down and left-right vibrations during the high-speed conveying of aluminum foil, avoid rigid extrusion that causes aluminum foil deformation and edge curling, realize the centering and limiting of aluminum foil throughout the feeding process, eliminate the problem of deviation, and ensure the positional accuracy of the subsequent oiling process. When the equipment is in formal production operation, the drive unit 5 is started, causing its output end to drive the two sets of coating rollers 4 to rotate synchronously in opposite directions, providing roller power for aluminum foil conveying and double-sided oiling. At the same time, the oil pump 903 is started, and the oil pump 903 draws the stamping oil stored in the oil storage tank 901 through the conveying pipe 902, and evenly distributes it to the spray pipes 905 on both sides through the diverter pipe 904. Finally, the oil is atomized and sprayed onto the surface of the two sets of coating rollers 4 by multiple nozzles 906 on the surface of the spray pipes 905, so that the roller surface of the coating rollers 4 is evenly coated with lubricating oil. The aluminum foil completes the double-sided uniform oiling operation as it passes between the two sets of coating rollers 4. During the oiling operation, excess lubricating oil on the surface of the coating rollers 4 is discharged from the oiling rollers. The dripping lubricating oil is collected by the oil collection hopper 7 below and flows into the tank 1. The dripping lubricating oil contains impurities such as aluminum powder and dried oil stains caused by aluminum foil wear. These impurities are intercepted and filtered by the filter plate 8 inside the tank 1. The impurities are trapped on the surface of the filter plate 8, and the clean oil is retained at the bottom of the tank 1. At the same time, the return pump 907 is started. The return pump 907 pumps the clean lubricating oil that has been filtered inside the tank 1 back into the oil storage tank 901 through the return pipe 908, forming a complete closed-loop oil supply system. This realizes the recycling and reuse of lubricating oil, greatly reduces oil consumption and production costs, and avoids environmental pollution caused by waste oil discharge. It is energy-saving and environmentally friendly. During the continuous rotation of the coating roller 4, dried oil stains, aluminum powder, and impurities will gradually adhere to the roller surface, affecting the uniformity of oil application. At this time, the drive device 126 is activated, which pushes the moving plate 122 along the slide bar 121 towards the coating roller 4. The moving plate 122 transmits elastic pressure to the fixed plate 123 through four sets of tension springs 124. The scraper 125 on the fixed plate 123 has its blade edge in close contact with the surface of the coating roller 4. As the coating roller 4 rotates, the scraper 125 automatically scrapes off the oil stains and impurities attached to the roller surface, keeping the roller surface clean. The four sets of tension springs 124 provide continuous elastic compensation force to ensure that the scraper 125 can still be in close contact with the roller surface when the roller surface is worn or vibrates. The scraped dirt drips into the oil collection hopper 7 below with the oil. The dustproof telescopic sleeve 127 seals the groove of the mounting groove 120 to prevent oil mist and aluminum powder particles from entering the sliding pair of the slide bar 121 and protect the transmission mechanism. When the filter plate 8 needs to be cleaned or replaced, unscrew the locking bolt 16 on the side of the housing 1 to disengage the locking bolt 16 from the screw hole 15 on the insert 13. Then, pull out the insert 13 along the direction of the slot 14 to remove the filter plate 8 from the housing 1 for cleaning or replacement. After cleaning, insert the insert 13 into the slot 14 and tighten the locking bolt 16 to relock the filter plate 8.

[0031] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A supercritical foaming composite thermal insulation aluminum foil production device for lunch boxes, comprising a housing (1), characterized in that: A mounting frame (2) is fixedly installed on the upper surface of the box (1). Guide rollers (3) are symmetrically rotated on the front and rear sides of the mounting frame (2). Two sets of applicator rollers (4) are rotatably connected to the inner side of the mounting frame (2). A drive device (5) is fixedly installed on the outer side of the mounting frame (2). A guide roller (6) is rotatably connected to the inner side of the mounting frame (2), and the guide roller (6) is located directly above the applicator roller (4). An oil collection hopper (7) is fixedly installed on the inner bottom side of the mounting frame (2), and the oil collection hopper (7) is located directly below the applicator roller (4). The outlet of the oil collection hopper (7) is connected to the inside of the box (1). A filter plate (8) is provided on the inner side of the box (1). The inner side of the mounting bracket (2) is equipped with an oiling component (9) for double-sided oiling of aluminum foil. An anti-deviation limiting component (10) is installed on the side of the mounting bracket (2) and on the feeding side of the coating roller (4). The anti-deviation limiting component (10) is used to center and limit the conveying aluminum foil to prevent deviation. The inner side of the mounting frame (2) is equipped with a cleaning and scraping assembly (12) for automatic descaling of the roller.

2. The supercritical foaming composite aluminum foil production device for insulated lunch boxes according to claim 1, characterized in that: The oiling assembly (9) includes an oil storage tank (901) fixedly installed on the outside of the mounting frame (2). The oil outlet of the oil storage tank (901) is fixedly connected to a conveying pipe (902). The end of the conveying pipe (902) is fixedly connected to an oil pump (903). The oil outlet of the oil pump (903) is fixedly connected to a diverter pipe (904). Two sets of spray pipes (905) are symmetrically installed on the inner side of the mounting frame (2), and the two sets of spray pipes (905) are respectively located above the two sets of coating rollers (4). The outer surface of the spray pipe (905) is provided with several nozzles (906).

3. The supercritical foaming composite aluminum foil production device for insulated lunch boxes according to claim 2, characterized in that: The oiling assembly (9) also includes a return pump (907) fixedly installed on the outside of the housing (1), and the input end of the return pump (907) is connected to the inside of the housing (1). The side of the oil storage tank (901) is fixedly connected to a return pipe (908), and one end of the return pipe (908) is fixedly connected to the output end of the return pump (907).

4. The supercritical foaming composite aluminum foil production device for insulated lunch boxes according to claim 1, characterized in that: The anti-deviation limiting component (10) includes a mounting plate (101) fixedly installed on the side of the mounting frame (2). Two sets of racks (102) are symmetrically slidably connected on the inner side of the mounting plate (101). A second driving device (103) is fixedly installed on the mounting plate (101). A gear (104) is fixedly connected to the output end of the second driving device (103), and the gear (104) meshes with the two sets of racks (102). A connecting plate (105) is fixedly connected to the ends of the two sets of racks (102). An installation cylinder (106) is fixedly connected to the connecting plate (105), and a through hole for the installation cylinder (106) to pass through is opened on the side of the mounting frame (2).

5. The supercritical foaming composite aluminum foil production device for insulated lunch boxes according to claim 4, characterized in that: The anti-deviation limiting component (10) also includes a telescopic rod (107) slidably connected to the inner side of the mounting cylinder (106). The end of the telescopic rod (107) is fixedly connected to a wheel frame, and a limiting wheel (108) is rotatably connected to the inner side of the wheel frame. The other end of the telescopic rod (107) is fixedly connected to a round block (109). The inner side of the mounting cylinder (106) is fixedly connected to a tension spring (110), and the other end of the tension spring (110) is fixedly connected to the side of the round block (109).

6. The supercritical foaming composite aluminum foil production device for insulated lunch boxes according to claim 4, characterized in that: Both sets of racks (102) are fixedly connected to the upper side of the racks (111), and the mounting plate (101) is symmetrically provided with limit grooves (112) on the inner side, and the limit grooves (112) and the limit blocks (111) are slidably engaged.

7. The supercritical foaming composite aluminum foil production device for insulated lunch boxes according to claim 1, characterized in that: The cleaning and scraping assembly (12) includes a mounting groove (120) opened inside the mounting bracket (2). A slide rod (121) is fixedly connected to the inner wall of the mounting groove (120). A moving plate (122) and a fixed plate (123) are slidably connected to the surface of the slide rod (121). Four sets of tension springs (124) are provided between the moving plate (122) and the fixed plate (123). A scraper (125) is fixedly connected to the side of the fixed plate (123). A driving device (126) is fixedly installed on the inner wall of the mounting groove (120). A dustproof telescopic sleeve (127) is provided at the opening of the mounting groove (120).

8. The supercritical foaming composite aluminum foil production device for insulated lunch boxes according to claim 7, characterized in that: One end of the fourth tension spring (124) is fixedly connected to the side of the movable plate (122), and the other end is fixedly connected to the side of the fixed plate (123).

9. The supercritical foaming composite aluminum foil production device for insulated lunch boxes according to claim 7, characterized in that: The output end of the drive device three (126) is fixedly connected to the side of the moving plate (122), one side of the dustproof telescopic sleeve (127) is fixedly connected to the inner wall of the mounting groove (120), and the other side of the dustproof telescopic sleeve (127) is fixedly connected to the side of the fixed plate (123).

10. The supercritical foaming composite aluminum foil production device for insulated lunch boxes according to claim 1, characterized in that: The filter plate (8) is symmetrically fixedly connected with inserts (13) on both sides. The side of the box (1) is symmetrically provided with slots (14), and the slots (14) and inserts (13) are slidably engaged. The side of the inserts (13) is provided with screw holes (15). The side of the box (1) is provided with locking bolts (16), and the locking bolts (16) are threadedly engaged with the screw holes (15).

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