Annular edge sealing device for aluminum foil meal box

Abstract

The invention relates to the technical field of aluminum foil meal box sealing, in particular to an annular edge sealing device for an aluminum foil meal box, which comprises an operation table, and the top end of the operation table is fixedly connected with two symmetrical fixing plates and a supporting plate; and the discharging mechanism is arranged on the two fixing plates and used for automatically placing aluminum foil meal boxes. Through the arrangement of the discharging mechanism, an aluminum foil meal box is automatically put into a designated containing groove, then liquid food is injected into the aluminum foil meal box through the automatic injection assembly, then a box cover is automatically picked up through the automatic edge sealing mechanism, then the aluminum foil meal box is covered with the box cover, edge sealing is conducted, and then the aluminum foil meal box is automatically disengaged; through coherent operation of liquid food injection, edge sealing and discharging, manual operation and a transfer link on a production line can be reduced, so that the production efficiency is improved, and pollution and food scattering possibly caused in the process of transferring the prefabricated dishes between different devices are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum foil lunch box sealing, and in particular to an annular edge sealing device for an aluminum foil lunch box. Background Art

[0002] Aluminum foil lunch box is a common food packaging container, usually used for holding cooked food, take-out food or storing pre-prepared dishes. This type of lunch box is usually made of aluminum foil material, has good sealing and heat preservation properties, and can effectively maintain the freshness and temperature of food. In order to prevent food from spilling when transporting food in the aluminum foil lunch box, the aluminum foil lunch box usually needs to be sealed.

[0003] In some pre-prepared food factories, it is usually necessary to seal the edges of a large number of aluminum foil lunch boxes. The existing edge sealing devices are usually in a separate containing device. The pre-prepared food is placed in the aluminum foil lunch box, and then transported to a designated edge sealing device, followed by edge sealing, and finally taken out. During this transportation process, it cannot be guaranteed that dust will not enter the pre-prepared food, and it may also cause the pre-prepared food to spill. The above steps cannot be integrated into one device. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a ring-shaped edge sealing device for an aluminum foil lunch box, which can effectively solve the problem in the prior art that after the pre-prepared food is placed in the aluminum foil lunch box, it must be transported to a designated edge sealing device and then edge sealed, which may contaminate the pre-prepared food during transportation and may also cause the pre-prepared food to spill.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a ring-shaped edge sealing device for an aluminum foil lunch box, comprising: An operating table, the top of which is fixedly connected with two symmetrical fixing plates and a supporting plate; A material discharging mechanism, which is arranged on two fixed plates and is used for automatically placing the aluminum foil lunch box; An automatic edge sealing mechanism, the automatic edge sealing mechanism includes an automatic material injection assembly, the automatic edge sealing mechanism is arranged on a side of the support plate close to the fixed plate, the automatic material injection assembly is used to inject the pre-prepared food into the aluminum foil lunch box, and then the aluminum foil lunch box is sealed by the automatic edge sealing mechanism; An automatic shedding mechanism, which automatically sheaves the aluminum foil lunch box after the automatic edge sealing mechanism completes edge sealing; PLC controller.

[0006] Preferably, the discharge mechanism includes a storage box fixedly connected to the top of the fixed plate, the bottom end of the storage box is provided with a box outlet, a fixed shell is fixedly connected between the two fixed plates, the side of the fixed shell close to the support plate is an outlet, and a baffle is hinged at the outlet, a plurality of electric telescopic rods are fixedly connected to the inner wall of the fixed shell close to the baffle side, the telescopic end of the electric telescopic rod is fixedly connected to a round head, a micro-exhaust pump is arranged in the round head, an air suction port is provided in the area of ​​the round head close to the baffle, and the air suction port is communicated with the exhaust end of the micro-exhaust pump.

[0007] Preferably, a reel is fixedly connected to the bottom end of the storage box, and a blocking cloth is inside the reel, the other end of the blocking cloth is fixedly connected to a connecting plate, one side of the connecting plate is fixedly connected to the telescopic ends of multiple electric telescopic rods, and the blocking cloth is used to block the box outlet to prevent the aluminum foil lunch box from falling.

[0008] Preferably, the automatic edge sealing mechanism includes a transverse plate, a transverse block and a special-shaped plate fixedly connected in sequence from bottom to top on the side of the support plate facing the storage box, the number of the transverse plate, the transverse block and the special-shaped plate are two and symmetrical, the outer wall of the transverse plate is fixedly connected to a motor, the output end of the motor is fixedly connected to a rotating shaft, the outer wall of the rotating shaft is fixedly connected to an arc block and a connecting block, one side of the connecting block motor is fixedly connected to a lever, the outer wall of the rotating shaft is fixedly connected to a first arm, the other end of the first arm is hinged to a second arm, a rotating rod is rotatably connected between the two transverse blocks, the end of the rotating rod close to the first arm first passes through the transverse block and is rotatably connected to it, and is then fixedly connected to a third arm fixedly connected to the second arm, and the outer wall of the rotating rod is fixedly connected to two fourth arms symmetrical about the third arm.

[0009] Preferably, a rotating rod is rotatably connected between the two horizontal plates, and the outer wall of the rotating rod is fixedly connected to a regular polygonal plate and a regular polygonal tube, and the number of sides of the cross-section of the regular polygonal tube is consistent with that of the regular polygonal plate, and the regular polygonal plate is provided with an arc groove corresponding to the position of the arc block at the center position of each side surface, and the regular polygonal plate is provided with a movable groove at each edge that cooperates with the lever to move.

[0010] Preferably, sliders are hinged on opposite sides of the two special-shaped plates, movable plates are hinged on the tops of the two fourth arms, and the outer walls of the movable plates are provided with slide grooves slidably connected to the sliders. The two movable plates are fixedly connected to an extrusion plate at one end close to the fourth arm, and a micro air pump is arranged in the extrusion plate. A plurality of exhaust ports are arranged on the side of the extrusion plate away from the movable plate, and each group of exhaust ports corresponds to the position of the electric telescopic rod, and the exhaust end of the micro air pump is communicated with the exhaust port, and a rapid heating plate is arranged on the side of the extrusion plate away from the movable plate, and a placement through hole is provided on the two special-shaped plates, and a cover plate is slidably connected in the placement through hole, and the PLC controller is connected with the micro air pump and the micro exhaust pump by electrical signals to form an exhaust circuit.

[0011] Preferably, the automatic injection assembly includes a connecting strip fixedly connected to the outer walls of the two movable plates, a plurality of injection tubes are fixedly connected to the top of the connecting strip, and the number of the injection tubes is consistent with the number of the electric telescopic rods, and the injection tubes are connected to an external storage barrel.

[0012] Preferably, the automatic falling-off mechanism includes a placement slot opened on each side of the regular polygonal tube, the number of the placement slots in each side is consistent with the number of electric telescopic rods, and the placement slots are consistent in size with the aluminum foil lunch box, the outer wall of the regular polygonal tube is fixedly connected to an air pump, the output end of the air pump is fixedly connected to an air suction pipe, the other end of the air suction pipe passes through the regular polygonal tube and communicates with the placement slot, an electromagnetic valve is arranged in the air suction pipe, each side of the regular polygonal tube is fixedly connected to a light receiver, the top of the operating table is fixedly connected to a triangular output plate, the top of the triangular output plate is fixedly connected to a light board, and the light board is below the light receiver, the PLC controller is connected to the light receiver signal, and the light receiver is respectively connected to the electromagnetic valve signal in each side to form a falling-off loop.

[0013] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects: Through the set discharge mechanism, the aluminum foil lunch box is automatically placed in the designated placement slot, and then the liquid food is injected into the aluminum foil lunch box through the automatic injection component, and then the box cover is automatically picked up by the automatic edge sealing mechanism, and then the box cover is covered on the aluminum foil lunch box, and then the edge is sealed, and then the aluminum foil lunch box is automatically removed. The continuous operation of injecting liquid food, edge sealing, and discharging can reduce manual operations and transfer links on the production line, thereby improving production efficiency and avoiding possible contamination and food spillage in the process of transferring pre-prepared dishes between different equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of a partial cross-sectional three-dimensional structure of the present invention. Figure 1 ; Figure 3 It is a partial three-dimensional structural schematic diagram of the present invention; Figure 4 The present invention is a partial cross-sectional three-dimensional structure diagram Figure 2 ; Figure 5 For the present invention Figure 4 A schematic diagram of the three-dimensional enlarged structure of part A; Figure 6 It is a schematic diagram of the three-dimensional structure of the extruded plate of the present invention.

[0016] Figure numerals: 1, operating table; 2, fixed plate; 3, support plate; 4, material discharge mechanism; 41, storage box; 42, box outlet; 43, fixed shell; 44, baffle; 45, electric telescopic rod; 46, round head; 47, connecting plate; 48, air suction port; 49, reel; 410, cloth stop; 5, automatic edge sealing mechanism; 51, automatic injection assembly; 5101, connecting strip; 5102, injection tube; 52, horizontal plate; 53, horizontal block; 54, special-shaped plate; 55, motor; 56, rotating shaft; 57, arc block; 58, connecting block; 59, lever; 510, first arm; 51 1. Second arm; 512. Rotating rod; 513. Third arm; 514. Fourth arm; 515. Rotating rod; 516. Regular polygonal plate; 517. Regular polygonal tube; 518. Arc groove; 519. Moving groove; 520. Sliding block; 521. Movable plate; 522. Sliding groove; 523. Extrusion plate; 524. Air extraction port; 525. Multiplying cover plate; 526. Placement through hole; 6. Automatic falling off mechanism; 61. Placement groove; 62. Air extraction pump; 63. Air extraction pipe; 64. Solenoid valve; 65. Light receiver; 66. Triangular output plate; 67. Light board; 7. PLC controller. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The present invention will be further described below in conjunction with the embodiments.

[0019] Example: Refer to Figures 1 to 6 , a ring-shaped edge sealing device for an aluminum foil lunch box, comprising: An operating table 1, the top of which is fixedly connected with two symmetrical fixing plates 2 and a supporting plate 3; A material discharging mechanism 4 is provided on the two fixed plates 2 and is used for automatically placing the aluminum foil lunch box; The discharge mechanism 4 includes a storage box 41 fixedly connected to the top of the fixed plate 2, a box outlet 42 is provided at the bottom of the storage box 41, a fixed shell 43 is fixedly connected between the two fixed plates 2, the side of the fixed shell 43 close to the support plate 3 is an outlet, and a baffle 44 is hinged at the outlet, a plurality of electric telescopic rods 45 are fixedly connected to the inner wall of the fixed shell 43 close to the baffle 44, a round head 46 is fixedly connected to the telescopic end of the electric telescopic rod 45, a micro-exhaust pump is arranged in the round head 46, an air suction port 48 is provided in the area of ​​the round head 46 close to the baffle 44, and the air suction port 48 is communicated with the exhaust end of the micro-exhaust pump.

[0020] The automatic edge sealing mechanism 5 includes an automatic material injection component 51, which is arranged on a side of the support plate 3 close to the fixed plate 2. The automatic material injection component 51 is used to inject the pre-prepared food into the aluminum foil lunch box, and then the aluminum foil lunch box is sealed by the automatic edge sealing mechanism 5; The automatic edge sealing mechanism 5 includes a transverse plate 52, a transverse block 53 and a special-shaped plate 54 which are fixedly connected in sequence from bottom to top on the side of the support plate 3 facing the storage box 41. The number of the transverse plate 52, the transverse block 53 and the special-shaped plate 54 are two and symmetrical. The outer wall of the transverse plate 52 is fixedly connected to a motor 55. The output end of the motor 55 is fixedly connected to a rotating shaft 56. The outer wall of the rotating shaft 56 is fixedly connected to an arc block 57 and a connecting block 58. One side of the connecting block 58 is fixedly connected to a lever 5 9. The outer wall of the rotating shaft 56 is fixedly connected to the first arm 510, and the other end of the first arm 510 is hinged to the second arm 511. A rotating rod 512 is rotatably connected between the two cross blocks 53. The end of the rotating rod 512 close to the first arm 510 first passes through the cross block 53 and is rotatably connected thereto, and then is fixedly connected to the third arm 513 fixedly connected to the second arm 511. The outer wall of the rotating rod 512 is fixedly connected to two fourth arms 514 that are symmetrical about the third arm 513.

[0021] A rotating rod 515 is rotatably connected between the two horizontal plates 52, and a regular polygonal plate 516 and a regular polygonal tube 517 are fixedly connected to the outer wall of the rotating rod 515, and the number of sides of the cross section of the regular polygonal tube 517 is consistent with that of the regular polygonal plate 516. The regular polygonal plate 516 is provided with an arc groove 518 corresponding to the position of the arc block 57 at the center position of each side surface, and the regular polygonal plate 516 is provided with a movable groove 519 at each edge that cooperates with the lever 59 to be moved.

[0022] The two special-shaped plates 54 are hinged with sliders 520 on opposite sides, and the tops of the two fourth arms 514 are hinged with movable plates 521. The outer wall of the movable plate 521 is provided with a slide groove 522 slidably connected to the slider 520. The two movable plates 521 are fixedly connected with an extrusion plate 523 at one end close to the fourth arm 514. A micro air pump is arranged in the extrusion plate 523. A plurality of groups of air suction ports 524 are arranged on the side of the extrusion plate 523 away from the movable plate 521, and each group of air suction ports 524 corresponds to the position of the electric telescopic rod 45. The exhaust end of the micro air pump is communicated with the exhaust port 524, and a rapid heating plate is arranged on the side of the extrusion plate 523 away from the movable plate 521. The two special-shaped plates 54 are provided with a placement through hole 526, and a cover plate 525 is slidably connected in the placement through hole 526. The PLC controller is connected with the micro air pump and the micro exhaust pump by electrical signals to form an exhaust circuit.

[0023] The automatic injection assembly 51 includes a connecting strip 5101 fixedly connected to the outer walls of the two movable plates 521. The top of the connecting strip 5101 is fixedly connected to a plurality of injection tubes 5102, and the number of the injection tubes 5102 is consistent with the number of the electric telescopic rods 45. The injection tubes 5102 are connected to the external storage barrel. An automatic shedding mechanism 6, which automatically sheaves the aluminum foil lunch box after the automatic edge sealing mechanism 5 completes the edge sealing; The automatic shedding mechanism 6 includes a placement slot 61 opened on each side of the positive polygonal tube 517, the number of the placement slots 61 in each side is consistent with the number of the electric telescopic rods 45, and the placement slots 61 are consistent with the size of the aluminum foil lunch box, the outer wall of the positive polygonal tube 517 is fixedly connected with an air pump 62, the output end of the air pump 62 is fixedly connected with an air suction pipe 63, the other end of the air suction pipe 63 passes through the positive polygonal tube 517 and communicates with the placement slot 61, and an electromagnetic valve 64 is arranged in the air suction pipe 63, each side of the positive polygonal tube 517 is fixedly connected with a light receiver 65, the top of the operating table 1 is fixedly connected with a triangular output plate 66, the top of the triangular output plate 66 is fixedly connected with a light board 67, and the light board 67 is below the light receiver 65, the PLC controller is connected with the light receiver 65 signal, and the light receiver 65 is respectively connected with the electromagnetic valve 64 signal in each side to form a shedding circuit. A reel 49 is fixedly connected to the bottom end of the storage box 41, and a blocking cloth 410 is inside the reel 49. The other end of the blocking cloth 410 is fixedly connected to a connecting plate 47. One side of the connecting plate 47 is fixedly connected to the telescopic ends of multiple electric telescopic rods 45, and the blocking cloth 410 is used to block the box outlet 42 to prevent the aluminum foil lunch box from falling.

[0024] PLC controller.

[0025] The working principle of the present invention is as follows: First, put the aluminum foil lunch box into the storage box 41, and let the aluminum foil lunch box fall into the fixed shell 43 through the box outlet 42 of the storage box 41, then start the electric telescopic rod 45, and drive the round head 46 to move toward the direction of the aluminum foil lunch box through the electric telescopic rod 45, and at the same time control the micro exhaust pump and the air pump 62 to start through the PLC controller 7, and adsorb the round aluminum foil lunch box through the air suction port 48, as the electric telescopic rod 45 continues to extend, it will drive the aluminum foil lunch box to push the baffle 44 and continue to move until it moves to the placement groove 61 in the positive polygonal tube 517, and the air in the placement groove 61 is extracted by the air pump 62, so that the aluminum foil lunch box can be fixed in the placement groove 61, because the micro exhaust pump has a higher exhaust efficiency than the air pump 62, it can prevent the aluminum foil lunch box from following the electric telescopic rod 45 to reset, and then the electric telescopic rod 45 automatically resets.

[0026] At the same time, the motor 55 is started, and the rotating shaft 56 is driven to rotate by the motor 55. The rotation of the rotating shaft 56 will drive the arc block 57 to rotate, and the arc surface of the arc block 57 is intermittently contacted with the arc groove 518 by the rotation of the arc block 57. When the arc block 57 is not in contact with the arc groove 518, since the arc block 57 and the connecting block 58 are vertical, the shift block is driven to contact with the moving groove 519, and the positive polygonal plate 516 is driven to rotate by the rotation of the shift rod 59. When the shift rod 59 is separated from the moving groove 519, the arc groove 518 contacts the arc block 57 to prevent the positive polygonal plate 516 from rotating automatically. The rotating rod 515 is driven to rotate by the positive polygonal plate 516, and the positive polygonal tube 517 is further driven to rotate. Since there is a moving groove 519 at the intersection of each edge of the positive polygonal plate 516, the positive polygonal tube 517 will stop rotating each time it switches to the next side.

[0027] The first arm 510 is driven to rotate around the axis by the rotating shaft 56, and the second arm 511 is driven to move forward and backward at the same time, and the third arm 513 is further driven to rotate around the axis of the rotating rod 512, and the rotating rod 512 is further driven to rotate synchronously, so that the rotating rod 512 drives the fourth arm 514 to rotate in the opposite direction, and further drives the movable plate 521 to move. The moving route of the movable plate 521 is from the extrusion plate 523 to move downward to the extrusion plate 523 toward the positive polygonal tube 517. Specifically, the fourth arm 514 slowly drives the movable plate 521 to move upward. Since the slider 520 is hinged to the special-shaped plate 54, the rotation of the fourth arm 514 will drive the movable plate 521 and the slider 520 to move toward the positive polygonal tube 51, and then slowly move toward the direction of the positive polygonal tube 517. This process is a process in which the arc block 57 is in the arc groove 518 and the positive polygonal tube 517 does not move.

[0028] During the downward movement of the extrusion plate 523, the box cover on the surface of the cover plate 525 is adsorbed by the activation of the micro air pump, and then the cover is placed on the aluminum foil lunch box. Since the extrusion plate 523 has a rapid heating plate, the aluminum foil lunch box and the box cover can be quickly sealed.

[0029] As the positive polygonal cylinder 517 slowly rotates, the aluminum foil lunch box with sealed edges will face vertically downwards. At the same time, the light receiver 65 on this side will receive the light emitted by the light board 67, and the light receiver 65 will not be affected by daily light. The light receiver 65 will send an electrical signal to the PLC controller 7, and the PLC controller 7 will control the solenoid valve 64 in the exhaust pipe 63 on this side to be closed. Without suction, the aluminum foil lunch box in the placement slot 61 will fall on the triangular output plate 66.

[0030] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ring-shaped edge sealing device for an aluminum foil lunch box, characterized in that: include: An operating table (1), wherein the top of the operating table (1) is fixedly connected to two symmetrical fixing plates (2) and a supporting plate (3); A material discharging mechanism (4), the material discharging mechanism (4) being arranged on the two fixed plates (2) and being used for automatically placing the aluminum foil lunch box; An automatic edge sealing mechanism (5), the automatic edge sealing mechanism (5) comprising an automatic material injection assembly (51), the automatic edge sealing mechanism (5) being arranged on a side of the support plate (3) close to the fixed plate (2), the automatic material injection assembly (51) being used to inject the pre-prepared food into the aluminum foil lunch box, and then the aluminum foil lunch box is edge sealed by the automatic edge sealing mechanism (5); An automatic shedding mechanism (6), which automatically shedding the aluminum foil lunch box after the automatic edge sealing mechanism (5) completes edge sealing; PLC controller.

2. The annular edge sealing device for an aluminum foil lunch box according to claim 1, characterized in that: The material discharge mechanism (4) comprises a storage box (41) fixedly connected to the top of the fixed plate (2), a box outlet (42) being provided at the bottom of the storage box (41), a fixed shell (43) being fixedly connected between the two fixed plates (2), a side of the fixed shell (43) close to the support plate (3) being an outlet, and a baffle (44) being hinged at the outlet, a plurality of electric telescopic rods (45) being fixedly connected to the inner wall of a side of the fixed shell (43) close to the baffle (44), a round head (46) being fixedly connected to the telescopic end of the electric telescopic rod (45), a micro exhaust pump being arranged in the round head (46), an air suction port (48) being provided in the area of ​​the round head (46) close to the baffle (44), and the air suction port (48) being connected to the exhaust end of the micro exhaust pump.

3. The annular edge sealing device for an aluminum foil lunch box according to claim 2, characterized in that: The bottom end of the storage box (41) is fixedly connected to a reel (49), and a blocking cloth (410) is placed inside the reel (49). The other end of the blocking cloth (410) is fixedly connected to a connecting plate (47), one side of the connecting plate (47) is fixedly connected to the telescopic ends of a plurality of electric telescopic rods (45), and the blocking cloth (410) is used to block the box outlet (42) to prevent the aluminum foil lunch box from falling.

4. The annular edge sealing device for an aluminum foil lunch box according to claim 3, characterized in that: The automatic edge-sealing mechanism (5) comprises a transverse plate (52), a transverse block (53) and a special-shaped plate (54) which are fixedly connected in sequence from bottom to top on a side of the support plate (3) facing the storage box (41); the number of the transverse plate (52), the transverse block (53) and the special-shaped plate (54) are two and symmetrical; the outer wall of the transverse plate (52) is fixedly connected to a motor (55); the output end of the motor (55) is fixedly connected to a rotating shaft (56); the outer wall of the rotating shaft (56) is fixedly connected to an arc block (57) and a connecting block (58); one side of the connecting block (58) is fixedly connected to the motor (55); A lever (59) is provided, the outer wall of the rotating shaft (56) is fixedly connected to a first arm (510), the other end of the first arm (510) is hinged to a second arm (511), a rotating rod (512) is rotatably connected between the two transverse blocks (53), one end of the rotating rod (512) close to the first arm (510) first passes through the transverse block (53) and is rotatably connected thereto, and then is fixedly connected to a third arm (513) fixedly connected to the second arm (511), and the outer wall of the rotating rod (512) is fixedly connected to two fourth arms (514) symmetrical with respect to the third arm (513).

5. The annular edge sealing device for an aluminum foil lunch box according to claim 4, characterized in that: A rotating rod (515) is rotatably connected between the two horizontal plates (52); a regular polygonal plate (516) and a regular polygonal tube (517) are fixedly connected to the outer wall of the rotating rod (515); the regular polygonal tube (517) and the regular polygonal plate (516) have the same number of sides in the cross section; the regular polygonal plate (516) is provided with an arc groove (518) corresponding to the position of the arc block (57) at the center position of each side surface; and the regular polygonal plate (516) is provided with a movable groove (519) at each edge thereof for cooperating with the lever (59) for shifting.

6. The annular edge sealing device for an aluminum foil lunch box according to claim 5, characterized in that: The two special-shaped plates (54) are hingedly connected to a slider (520) on one side opposite to the other. The top ends of the two fourth arms (514) are hingedly connected to a movable plate (521). The outer wall of the movable plate (521) is provided with a slide groove (522) slidably connected to the slider (520). The two movable plates (521) are fixedly connected to an extrusion plate (523) at one end close to the fourth arm (514). A micro air pump is arranged inside the extrusion plate (523). The extrusion plate (523) is on a side away from the movable plate (521). A plurality of groups of air extraction ports (524) are provided, and each group of air extraction ports (524) corresponds to the position of the electric telescopic rod (45), and the air extraction end of the micro air pump is connected to the air extraction port (524), and a rapid heating plate is provided on the side of the extrusion plate (523) away from the movable plate (521), and the two special-shaped plates (54) are provided with a placement through hole (526), ​​and a cover plate (525) is slidably connected in the placement through hole (526), ​​and the PLC controller is connected to the micro air pump and the micro air extraction pump by electrical signals to form an air extraction circuit.

7. The annular edge sealing device for an aluminum foil lunch box according to claim 6, characterized in that: The automatic injection assembly (51) comprises a connecting strip (5101) fixedly connected to the outer walls of the two movable plates (521); a plurality of injection tubes (5102) are fixedly connected to the top of the connecting strip (5101); the number of the injection tubes (5102) is consistent with the number of the electric telescopic rods (45); and the injection tubes (5102) are connected to an external material storage barrel.

8. The annular edge sealing device for an aluminum foil lunch box according to claim 7, characterized in that: The automatic falling mechanism (6) comprises a placement groove (61) provided on each side of the regular polygonal tube (517), the number of the placement grooves (61) on each side being consistent with the number of the electric telescopic rods (45), and the placement grooves (61) being consistent in size with the aluminum foil lunch box, an air pump (62) being fixedly connected to the outer wall of the regular polygonal tube (517), an air pump (62) being fixedly connected to the output end of the air pump (62) being fixedly connected to an air pump pipe (63), the other end of the air pump pipe (63) passing through the regular polygonal tube (517) and communicating with the placement groove (61), and the air pump (62) being fixedly connected to the output end of the air pump (62). A solenoid valve (64) is arranged in the air pipe (63); each side of the positive polygonal tube (517) is fixedly connected to a light receiver (65); the top of the operating table (1) is fixedly connected to a triangular output plate (66); the top of the triangular output plate (66) is fixedly connected to a light board (67), and the light board (67) is located below the light receiver (65); the PLC controller is connected to the light receiver (65) by signal, and the light receiver (65) is respectively connected to the solenoid valve (64) on each side by signal to form a shedding circuit.

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