Inflatable cake packaging equipment

Abstract

The invention discloses inflatable cake packaging equipment, and relates to the technical field of packaging equipment, the inflatable cake packaging equipment comprises two upper mounting racks and two lower mounting racks, the upper mounting racks are located above the lower mounting racks, the two upper mounting racks are located at the same height and are symmetrically arranged, and the two lower mounting racks are located at the same height and are symmetrically arranged; a synchronous conveying mechanism is rotatably mounted on the inner side of the upper mounting frame and the inner side of the lower mounting frame, packaging films are located on the periphery of the charging barrel, two inflation mechanisms are slidably mounted on the periphery of the charging barrel and located between the two packaging films, and a connecting frame is integrally formed at the bottom end of the lower mounting frame. The sealing mechanism and the inflation mechanism are linked through the linkage mechanism, staggered work of the heat sealing mechanism and the inflation mechanism can be achieved, the leakage amount of nitrogen can be effectively reduced, and the purpose of reducing nitrogen loss is achieved; due to the fact that it is guaranteed that the packaging bag can be filled with the preset amount of nitrogen, the packaging strength can be improved, and the cake is protected.

Description

Technical Field

[0001] The invention relates to the technical field of packaging equipment, in particular to an inflatable cake packaging equipment. Background Art

[0002] Cakes need to be packaged after industrial production. The existing packaging method is to heat-seal the two sides of two strip packaging films to form a cylindrical packaging bag, and then heat-seal and cut the upper and lower parts to form independent packaging bags. During the cake bagging process, nitrogen needs to be filled into the packaging bag to ensure that the cake is in an oxygen-free environment after packaging, which is conducive to extending the shelf life of the cake. The packaging bag filled with nitrogen can also provide a buffer protection space for the cake during the packing process to avoid squeezing damage.

[0003] In the prior art, during the process of filling the packaging bag with nitrogen and sealing it, the inflation tube needs to be pulled out of the packaging bag after the inflation operation is completed. At this time, the space inside the packaging bag will be connected to the external space. Since the air pressure inside the packaging bag is relatively high and the external air pressure is relatively low, part of the nitrogen in the packaging bag will overflow. In this way, during the long production process, not only is the nitrogen loss cost high, but the packaging bag is not filled with sufficient nitrogen, which will affect the preservation effect and reduce the anti-extrusion strength of the packaging. Summary of the invention

[0004] The purpose of the present invention is to provide an inflatable cake packaging device in order to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an inflatable cake packaging device, comprising two upper mounting frames and two lower mounting frames, the upper mounting frames are located above the lower mounting frames, the two upper mounting frames are located at the same height and are symmetrically arranged, the two lower mounting frames are located at the same height and are symmetrically arranged, a synchronous conveying mechanism is rotatably installed on the inner sides of the upper mounting frames and the lower mounting frames, the synchronous conveying mechanism is used to convey the packaging film downward, the packaging film is located on the outer periphery of the barrel, two inflation mechanisms are slidably installed on the outer periphery of the barrel, the inflation mechanism is located between the two packaging films, a connecting frame is integrally formed with the bottom end of the lower mounting frame, a sealing mechanism is installed on the top end of the connecting frame, and the sealing mechanism and the inflation mechanism are connected by a linkage mechanism.

[0006] As a further scheme of the present invention: the synchronous conveying mechanism includes four No. 1 heat-sealing wheels and four No. 2 heat-sealing wheels, the four No. 1 heat-sealing wheels are on the same vertical plane, the four No. 2 heat-sealing wheels are on the same vertical plane, and the four No. 1 heat-sealing wheels are symmetrically arranged with the four No. 2 heat-sealing wheels, the No. 1 heat-sealing wheels and the No. 2 heat-sealing wheels that are at the same horizontal height and symmetrically arranged are coaxially connected through a rotating shaft, and each rotating shaft is rotatably connected to the upper mounting frame and the lower mounting frame respectively, one end of the four No. 1 heat-sealing wheels is fixedly mounted with a gear, and two adjacent gears on the left and right are meshed with each other, and one end of the No. 2 heat-sealing wheel located above and the No. 2 heat-sealing wheel located below are both mounted with a No. 1 pulley, and the two No. 1 pulleys are connected through a No. 1 belt transmission; one of the rotating shafts is connected to a servo motor, and the servo motor is mounted on the outer wall of the upper mounting frame or the lower mounting frame through a motor bracket.

[0007] As a further solution of the present invention: the inflation mechanism includes two sliding ears integrally formed on the outer periphery of the barrel, the two sliding ears are symmetrically arranged front and back, the inner walls of the sliding ears are slidably connected with an air pipe up and down, the top of the air pipe is integrally formed with a fixing rod, a return spring is abutted between the bottom end of the fixing rod and the sliding ear, the return spring is sleeved with the air pipe, a circular frame is fixedly installed on one end of the fixing rod, and the air pipe is located between the barrel and the packaging film.

[0008] As a further solution of the present invention: the sealing mechanism includes a power component, a heat sealing component, a buffer component and a fixed plate, the fixed plate is fixedly connected between the two connecting frames, the heat sealing component is distributed at the top and bottom of the fixed plate, the buffer component is connected to the heat sealing component, and the buffer component is connected to the power component; The heat-sealing assembly includes a No. 1 heat-sealing plate arranged at the top of the fixed plate and a No. 2 heat-sealing plate arranged above and below the No. 1 heat-sealing plate. A semicircular hole equal to the outer diameter of the trachea is provided at one end of the two No. 1 heat-sealing plates close to each other. The two No. 1 heat-sealing plates and the two groups of No. 2 heat-sealing plates are symmetrically arranged. The distance between the two groups of No. 2 heat-sealing plates is greater than the distance between the two No. 1 heat-sealing plates. A group of No. 2 heat-sealing plates includes two heat-sealing strips symmetrically arranged up and down. The two heat-sealing strips are fixedly connected by a vertical rod. The fixed plate is provided with a slot for the heat-sealing strip to slide.

[0009] As a further scheme of the present invention: the power assembly includes a connecting bracket fixedly connected to the connecting frame, the number of the connecting brackets is four, a bidirectional screw is rotatably installed between two connecting brackets distributed along the length direction, and a guide rod is fixedly installed between the two connecting brackets distributed along the length direction, the guide rod is located below the bidirectional screw, one end of the two bidirectional screws are coaxially installed with a No. 2 pulley, a No. 2 belt is transmission connected between the two No. 2 pulleys, a motor bracket is fixedly installed on the outside of one of the connecting frames, a forward and reverse motor is fixedly installed on the motor bracket, the output end of the forward and reverse motor is coaxially connected to the end face center of a No. 2 pulley, the outer wall of the bidirectional screw is threadedly connected to two movable plates, the two movable plates are slidably connected to the guide rod, and the fixed plate is located in the middle groove position of the movable plate.

[0010] As a further solution of the present invention: the buffer assembly includes a sliding guide rod slidably connected to the movable plate, one end of the two sliding guide rods adjacent to each other on the same side are respectively fixedly connected to the No. 1 heat bonding plate, an anti-slip portion is integrally formed with the end of the sliding guide rod away from the No. 1 heat bonding plate, a connecting spring is abutted between the anti-slip portion and the movable plate, and the connecting spring is sleeved on the sliding guide rod.

[0011] As a further solution of the present invention: the linkage mechanism includes a horizontal plate fixedly connected to the bottom end of the lower heat-sealing strip, and an extrusion block is integrally formed at one end of the two horizontal plates away from each other.

[0012] As a further solution of the present invention: the linkage mechanism also includes two linkage rods fixedly installed on the bottom end of the circular frame, the bottom end of the linkage rod is integrally formed with a pressure block, the bottom end of the pressure block is provided with a first pressure inclined surface, the top end of the extrusion block is integrally formed with a second pressure inclined surface, the second pressure inclined surface has the same inclination angle as the first pressure inclined surface and is arranged opposite to each other; the outer sides of the upper mounting frame and the lower mounting frame are fixedly installed with guide sleeves slidably connected to the outer wall of the linkage rod.

[0013] As a further solution of the present invention: one end of the two air pipes is connected to the air pump through a pipeline, and the other air pipe is connected to the outside air through a pipeline, and a one-way air outlet valve is installed on the air pipe connected to the outside.

[0014] Compared with the prior art, the present invention has the following beneficial effects: By setting a linkage mechanism to link the sealing mechanism with the inflation mechanism, the interleaving operation of the heat sealing and inflation mechanisms can be realized, and the leakage of nitrogen can be effectively reduced, thereby achieving the purpose of reducing nitrogen loss. Since the packaging bag can be filled with a preset amount of nitrogen, the packaging strength can also be improved, which can protect the cake from extrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 For the present invention Figure 1 A partial enlarged view of the middle part; Figure 3 It is a structural schematic diagram of the synchronous conveying mechanism of the present invention; Figure 4 It is a schematic diagram of the installation of the linkage mechanism and the inflation mechanism of the present invention; Figure 5 For the present invention Figure 4 A partial enlarged view of point B in the middle; Figure 6 It is a schematic diagram of the installation of the sealing mechanism and the linkage structure of the present invention; Figure 7 It is a schematic diagram of the installation of the buffer assembly of the present invention.

[0016] In the figure: 1. upper mounting frame; 2. guide sleeve; 3. linkage rod; 4. circular frame; 5. barrel; 6. packaging film; 7. lower mounting frame; 8. air pipe; 9. pressure block; 10. connecting frame; 11. fixed rod; 12. sliding ear; 13. reset spring; 14. No. 1 heat sealing wheel; 15. No. 2 heat sealing wheel; 16. gear; 17. No. 1 pulley; 18. No. 1 belt; 19. first pressure inclined surface; 20. fixed plate; 21. connecting bracket; 22. bidirectional screw; 23. guide rod; 24. No. 1 heat sealing plate; 25. heat sealing strip; 26. forward and reverse motor; 27. No. 2 belt; 28. No. 2 pulley; 29. ​​moving plate; 30. semicircular hole; 31. horizontal plate; 32. extrusion block; 33. sliding guide rod; 34. connecting spring; 35. second pressure inclined surface. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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] See also Figure 1 to Figure 7In an embodiment of the present invention, an inflatable cake packaging device includes two upper mounting frames 1 and two lower mounting frames 7. The upper mounting frame 1 is located above the lower mounting frame 7. The two upper mounting frames 1 are located at the same height and are symmetrically arranged. The two lower mounting frames 7 are located at the same height and are symmetrically arranged. A synchronous conveying mechanism is rotatably installed on the inner side of the upper mounting frame 1 and the lower mounting frame 7. The synchronous conveying mechanism is used to convey the packaging film 6 downward. The packaging film 6 is located on the outer periphery of the barrel 5. Two inflation mechanisms are slidably installed on the outer periphery of the barrel 5. The inflation mechanism is located between the two packaging films 6. A connecting frame 10 is integrally formed at the bottom end of the lower mounting frame 7. A sealing mechanism is installed at the top of the connecting frame 10. The sealing mechanism and the inflation mechanism are connected through a linkage mechanism.

[0019] In this embodiment: first, the synchronous conveying mechanism is started, and the running synchronous conveying mechanism conveys the two packaging films 6 downward. During the conveying process, the two packaging films 6 are heat-sealed at the joint positions. After the synchronous conveying mechanism conveys the two packaging films 6 downward by a preset distance, it stops running. At this time, the sealing mechanism is started, and the sealing mechanism can heat-seal the packaging films 6 in the middle and the upper and lower parts respectively; after the middle part is heat-sealed first, the inflation mechanism is started, and the inflation mechanism conveys nitrogen into the packaging bag and squeezes out the air. Before the upper and lower parts are heat-sealed immediately afterwards, the inflation mechanism is pushed upward by the linkage mechanism to avoid the inflation mechanism affecting the upper and lower parts. During the resetting process of the sealing mechanism, the inflation mechanism and the linkage mechanism are reset to facilitate the next inflation packaging.

[0020] Please refer to Figure 1 and Figure 3 The synchronous conveying mechanism includes four No. 1 heat-sealing wheels 14 and four No. 2 heat-sealing wheels 15. The four No. 1 heat-sealing wheels 14 are on the same vertical plane, the four No. 2 heat-sealing wheels 15 are on the same vertical plane, and the four No. 1 heat-sealing wheels 14 and the four No. 2 heat-sealing wheels 15 are symmetrically arranged. The No. 1 heat-sealing wheels 14 and the No. 2 heat-sealing wheels 15 that are at the same horizontal height and symmetrically arranged are coaxially connected through a rotating shaft, and each rotating shaft is rotatably connected to the upper mounting frame 1 and the lower mounting frame 7 respectively. One end of the four No. 1 heat-sealing wheels 14 is fixedly installed with a gear 16, and two adjacent gears 16 on the left and right are meshed. A No. 1 pulley 17 is installed at one end of a No. 2 heat-sealing wheel 15 located above and a No. 2 heat-sealing wheel 15 located below, and the two No. 1 pulleys 17 are connected through a No. 1 belt 18 for transmission; one of the rotating shafts is connected to a servo motor, and the servo motor is installed on the outer wall of the upper mounting frame 1 or the lower mounting frame 7 through a motor bracket.

[0021] In this embodiment, the synchronous conveying mechanism operates as follows: by starting the servo motor, the servo motor drives a rotating shaft connected to it and a No. 1 heat sealing wheel 14 on the rotating shaft to rotate, and the No. 1 heat sealing wheel 14 drives the No. 2 heat sealing wheel 15 and the gear 16 arranged coaxially therewith to rotate through the rotating shaft, and the rotating gear 16 drives another No. 1 heat sealing wheel 14 arranged on the same horizontal plane to rotate through another gear 16, and the rotating No. 2 heat sealing wheel 15 drives the No. 1 belt pulley 17 coaxially connected thereto to rotate, and the No. 1 belt pulley 17 drives another No. 1 pulley 17 to rotate through the No. 1 belt, and the other No. 1 pulley 17 drives another No. 2 heat sealing wheel 15 coaxially connected thereto to rotate, and the other No. 2 heat sealing wheel 15 will drive the No. 1 heat sealing wheels 14 and No. 2 heat sealing wheels 15 arranged on the same horizontal plane to rotate synchronously in the same driving manner, thereby enabling the four No. 1 heat sealing wheels 14 and the four No. 2 heat sealing wheels 15 to rotate synchronously, thereby heat-sealing the film clamped by the No. 1 heat sealing wheel 14 and the No. 2 heat sealing wheel 15 on the side and conveying it downward at the same time.

[0022] It should be noted that: the No. 1 heat sealing wheel 14 and the No. 2 heat sealing wheel 15 are electrically connected to the external power supply through the conductive slip ring, the rotating part of the conductive slip ring is connected to the No. 1 heat sealing wheel 14 and the No. 2 heat sealing wheel 15, the fixed part of the conductive slip ring is electrically connected to the external power supply, and the outer periphery of the heat sealing wheel has an electric heating layer, and the electric heating layer is electrically connected to the rotating part of the conductive slip ring, thereby during the rotation of the No. 1 heat sealing wheel 14 and the No. 2 heat sealing wheel 15, the docking positions of the two packaging films 6 can be heat-sealed.

[0023] Please refer to Figure 6 and Figure 7 The sealing mechanism includes a power component, a heat sealing component, a buffer component and a fixing plate 20 , and the fixing plate 20 is fixedly connected between the two connecting frames 10 .

[0024] The heat sealing components are distributed at the top and bottom ends of the fixed plate 20, the buffer component is connected to the heat sealing component, and the buffer component is connected to the power component; the heat sealing component includes a No. 1 heat sealing plate 24 arranged at the top of the fixed plate 20 and a No. 2 heat sealing plate arranged above and below the No. 1 heat sealing plate 24, and a semicircular hole 30 equal to the outer diameter of the air pipe 8 is opened at one end of the two No. 1 heat sealing plates 24 close to each other, and the two No. 1 heat sealing plates 24 and two groups of No. 2 heat sealing plates are symmetrically arranged, and the distance between the two groups of No. 2 heat sealing plates is greater than the distance between the two No. 1 heat sealing plates 24. A group of No. 2 heat sealing plates includes two heat sealing strips 25 symmetrically arranged up and down with the No. 1 heat sealing plate 24 as the center, and the two heat sealing strips 25 are fixedly connected by a vertical rod, and a slot for the heat sealing strips 25 to slide is opened on the fixed plate 20.

[0025] The power assembly includes a connecting bracket 21 fixedly connected to the connecting frame 10, and the number of the connecting brackets 21 is four. A bidirectional screw 22 is rotatably installed between two connecting brackets 21 distributed along the length direction, and a guide rod 23 is fixedly installed between the two connecting brackets 21 distributed along the length direction, and the guide rod 23 is located below the bidirectional screw 22. One end of the two bidirectional screws 22 is coaxially installed with a No. 2 pulley 28, and a No. 2 belt 27 is transmission-connected between the two No. 2 pulleys 28. A motor bracket is fixedly installed on the outside of a connecting frame 10, and a forward and reverse motor 26 is fixedly installed on the motor bracket. The output end of the forward and reverse motor 26 is coaxially connected to the end face center of a No. 2 pulley 28. The outer wall of the bidirectional screw 22 is threadedly connected to two movable plates 29, and the two movable plates 29 are slidably connected to the guide rod 23, and the fixed plate 20 is located in the middle groove position of the movable plate 29.

[0026] The buffer assembly includes a sliding guide rod 33 slidably connected to the movable plate 29. One end of the two sliding guide rods 33 adjacent to each other on the same side is respectively fixedly connected to the No. 1 heat bonding plate 24. An anti-slip portion is integrally formed at one end of the sliding guide rod 33 away from the No. 1 heat bonding plate 24. A connecting spring 34 is abutted between the anti-slip portion and the movable plate 29, and the connecting spring 34 is sleeved on the sliding guide rod 33.

[0027] In this embodiment: by starting the forward and reverse motor 26, the forward and reverse motor 26 drives the No. 2 pulley 28 connected thereto to rotate, the rotating No. 2 pulley 28 drives another No. 2 pulley 28 to rotate through the No. 2 belt 27, the two rotating No. 2 pulleys 28 synchronously drive the two bidirectional screws 22 to rotate, the rotating bidirectional screws 22 drive the two movable plates 29 to move toward each other, at this time the movable plates 29 respectively drive the No. 1 heat sealing plate 24 and the No. 2 heat sealing plate connected thereto to move, until the two No. 1 heat sealing plates 24 are in contact with each other through the packaging film 6, at this time there is still a certain distance between the two No. 2 heat sealing plates; the No. 1 heat sealing plate 24 completes a heat seal in the middle, at this time the air pipe 8 is located inside the semicircular hole 30, and then the inflation mechanism can be started to fill with nitrogen, During this process, the forward and reverse motor 26 continues to rotate, so the moving plate 29 drives the No. 2 heat sealing plate to gradually approach the packaging film 6. At this time, the moving No. 2 heat sealing plate realizes the upward movement of the inflation mechanism through the linkage mechanism, so as to avoid the inflation mechanism from interfering with the upper and lower heat sealing of the No. 2 heat sealing plate; at this time, double-pass heat sealing can be completed. Since the No. 2 heat sealing plate is composed of two upper and lower heat sealing strips 25, double-pass heat sealing can be formed when the No. 2 heat sealing plate is heat-sealed, so that the incomplete seal formed by the inflation mechanism during inflation is completely heat-sealed. Through the sequential sealing operation of the No. 1 heat sealing plate 24 and the No. 2 heat sealing plate, the packaging film 6 that has been heat-sealed on both sides can be transversely heat-sealed and formed into a wider strip heat-sealed area, so that subsequent cutting operations or breakpoint punching can be performed in this area.

[0028] Please refer to Figure 4 , Figure 5 and Figure 6 The inflation mechanism includes two sliding ears 12 integrally formed on the outer periphery of the barrel 5, the two sliding ears 12 are symmetrically arranged front and back, the inner wall of the sliding ear 12 is slidably connected with the air pipe 8 up and down, the top of the air pipe 8 is integrally formed with a fixing rod 11, a return spring 13 is abutted between the bottom end of the fixing rod 11 and the sliding ear 12, the return spring 13 is sleeved with the air pipe 8, one end of the fixing rod 11 is fixedly installed with a circular frame 4, the air pipe 8 is located between the barrel 5 and the packaging film 6, the linkage mechanism includes a horizontal plate 31 fixedly connected to the bottom end of the lower heat sealing strip 25, and the ends of the two horizontal plates 31 away from each other are integrally formed with an extrusion block 32, and the linkage mechanism The structure also includes two linkage rods 3 fixedly installed at the bottom end of the circular frame 4, the bottom end of the linkage rod 3 is integrally formed with a pressure block 9, the bottom end of the pressure block 9 is provided with a first pressure inclined surface 19, and the top end of the extrusion block 32 is integrally formed with a second pressure inclined surface 35, the second pressure inclined surface 35 has the same inclination angle as the first pressure inclined surface 19 and is arranged relatively; the outer side of the upper mounting frame 1 and the lower mounting frame 7 is fixedly installed with a guide sleeve 2 slidably connected to the outer wall of the linkage rod 3, one end of an air pipe 8 is connected to the air pump through a pipeline, and the other air pipe 8 is connected to the outside air through a pipeline, and a one-way air outlet valve is installed on the air pipe 8 connected to the outside.

[0029] In this embodiment: when the No. 2 heat-sealing plate is heat-sealed, as the two groups of No. 2 heat-sealing plates approach each other, the heat-sealing strip 25 located below drives the cross plate 31 to move, and the cross plate 31 drives the extrusion block 32 to move until it contacts the pressure block 9. At this time, the second pressure-bearing inclined surface 35 is squeezed and contacted with the first pressure-bearing inclined surface 19, and the pressure block 9 moves upward. The upward-moving pressure block 9 pushes the linkage rod 3 to slide upward along the guide sleeve 2, and at the same time pushes the circular frame 4 to move upward. The circular frame 4 drives the two air pipes 8 to move upward through the fixed rod 11, and at the same time the reset spring 13 is stretched, thereby leaving heat-sealing space for the No. 2 heat-sealing plate to avoid interference between the No. 2 heat-sealing plate and the air pipe 8.

[0030] After the No. 1 heat sealing plate 24 is heat sealed and before the No. 2 heat sealing plate is heat sealed, the air pump is started to input nitrogen into one air pipe 8. As the nitrogen is filled, the air contained in the packaging bag is squeezed out and discharged to the outside through the other air pipe 8. The setting of the one-way valve can prevent the external air from flowing back. The air pipe 8 for introducing nitrogen is longer than the air pipe 8 for leading out air, so that the nitrogen can directly enter the bottom of the packaging bag, and the air on the inner wall is discharged through the air pipe 8 located at the upper part of the opening. It should be pointed out that both air pipes 8 are rigid tubes and are not easy to bend and deform.

[0031] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An inflatable cake packaging device, comprising two upper mounting frames (1) and two lower mounting frames (7), characterized in that: The upper mounting frame (1) is located above the lower mounting frame (7); the two upper mounting frames (1) are located at the same height and are symmetrically arranged; the two lower mounting frames (7) are located at the same height and are symmetrically arranged; a synchronous conveying mechanism is rotatably installed on the inner sides of the upper mounting frame (1) and the lower mounting frame (7); the synchronous conveying mechanism is used to convey the packaging film (6) downward; the packaging film (6) is located on the outer periphery of the barrel (5); two inflation mechanisms are slidably installed on the outer periphery of the barrel (5); the inflation mechanism is located between the two packaging films (6); a connecting frame (10) is integrally formed at the bottom end of the lower mounting frame (7); a sealing mechanism is installed at the top end of the connecting frame (10); the sealing mechanism and the inflation mechanism are connected via a linkage mechanism.

2. The inflatable cake packaging equipment according to claim 1, characterized in that: The synchronous conveying mechanism comprises four No. 1 heat-sealing wheels (14) and four No. 2 heat-sealing wheels (15), the four No. 1 heat-sealing wheels (14) are on the same vertical plane, the four No. 2 heat-sealing wheels (15) are on the same vertical plane, and the four No. 1 heat-sealing wheels (14) and the four No. 2 heat-sealing wheels (15) are symmetrically arranged, and the No. 1 heat-sealing wheels (14) and the No. 2 heat-sealing wheels (15) at the same horizontal height and symmetrically arranged are coaxially connected through a rotating shaft, and each rotating shaft is respectively connected to the upper mounting frame (1) and the lower mounting frame (7). The four first heat-sealing wheels (14) are dynamically connected, one end of each of the four first heat-sealing wheels (14) is fixedly mounted with a gear (16), two left and right adjacent gears (16) are meshed with each other, one end of a second heat-sealing wheel (15) located above and one end of a second heat-sealing wheel (15) located below are both mounted with a first belt pulley (17), and the two first belt pulleys (17) are connected in transmission via a first belt (18); one of the rotating shafts is connected to a servo motor, and the servo motor is mounted on the outer wall of the upper mounting frame (1) or the lower mounting frame (7) via a motor bracket.

3. The inflatable cake packaging equipment according to claim 2, characterized in that: The inflation mechanism comprises two sliding ears (12) integrally formed on the outer periphery of the barrel (5), the two sliding ears (12) being symmetrically arranged front and rearward, the inner wall of the sliding ear (12) being slidably connected with an air pipe (8) up and down, the top of the air pipe (8) being integrally formed with a fixing rod (11), a return spring (13) being abutted between the bottom end of the fixing rod (11) and the sliding ear (12), the return spring (13) being sleeved with the air pipe (8), one end of the fixing rod (11) being fixedly mounted with a circular frame (4), and the air pipe (8) being located between the barrel (5) and the packaging film (6).

4. The inflatable cake packaging equipment according to claim 3, characterized in that: The sealing mechanism comprises a power assembly, a heat sealing assembly, a buffer assembly and a fixed plate (20), the fixed plate (20) being fixedly connected between the two connecting frames (10), the heat sealing assembly being distributed at the top and bottom of the fixed plate (20), the buffer assembly being connected to the heat sealing assembly, and the buffer assembly being connected to the power assembly; The heat-sealing assembly comprises a No. 1 heat-sealing plate (24) arranged at the top of the fixed plate (20) and a No. 2 heat-sealing plate arranged above and below the No. 1 heat-sealing plate (24); a semicircular hole (30) having an outer diameter equal to that of the air pipe (8) is provided at one end of the two No. 1 heat-sealing plates (24) close to each other; the two No. 1 heat-sealing plates (24) and two groups of No. 2 heat-sealing plates are symmetrically arranged; the distance between the two groups of No. 2 heat-sealing plates is greater than the distance between the two No. 1 heat-sealing plates (24); a group of No. 2 heat-sealing plates comprises two heat-sealing strips (25) symmetrically arranged up and down; the two heat-sealing strips (25) are fixedly connected by a vertical rod; and a slot for the heat-sealing strips (25) to slide is provided on the fixed plate (20).

5. The inflatable cake packaging equipment according to claim 4, characterized in that: The power assembly comprises a connecting bracket (21) fixedly connected to the connecting frame (10), the number of the connecting brackets (21) being four, a bidirectional screw rod (22) being rotatably mounted between two connecting brackets (21) distributed along the length direction, and a guide rod (23) being fixedly mounted between two connecting brackets (21) distributed along the length direction, the guide rod (23) being located below the bidirectional screw rod (22), one end of the two bidirectional screw rods (22) being coaxially mounted with a second belt pulley (28), the two second belt pulleys A second belt (27) is connected for transmission between the two belts (28), a motor bracket is fixedly installed on the outside of the connecting frame (10), a forward and reverse motor (26) is fixedly installed on the motor bracket, the output end of the forward and reverse motor (26) is coaxially connected to the end face center of a second pulley (28), the outer wall of the bidirectional screw (22) is threadedly connected to two movable plates (29), the two movable plates (29) are slidably connected to the guide rod (23), and the fixed plate (20) is located at the middle groove position of the movable plate (29).

6. The inflatable cake packaging equipment according to claim 5, characterized in that: The buffer assembly comprises a sliding guide rod (33) slidably connected to the movable plate (29), one end of two adjacent sliding guide rods (33) on the same side are respectively fixedly connected to the first heat bonding plate (24), an anti-slip portion is integrally formed at one end of the sliding guide rod (33) away from the first heat bonding plate (24), a connecting spring (34) is abutted between the anti-slip portion and the movable plate (29), and the connecting spring (34) is sleeved with the sliding guide rod (33).

7. The inflatable cake packaging equipment according to claim 4, characterized in that: The linkage mechanism comprises a horizontal plate (31) fixedly connected to the bottom end of the lower heat-sealing strip (25), and an extrusion block (32) is integrally formed at one end of the two horizontal plates (31) that are away from each other.

8. The inflatable cake packaging equipment according to claim 7, characterized in that: The linkage mechanism further comprises two linkage rods (3) fixedly mounted on the bottom end of the circular frame (4); a pressure block (9) is integrally formed at the bottom end of the linkage rod (3); a first pressure inclined surface (19) is arranged at the bottom end of the pressure block (9); a second pressure inclined surface (35) is integrally formed at the top end of the extrusion block (32); the second pressure inclined surface (35) has the same inclination angle as the first pressure inclined surface (19) and is arranged opposite to the first pressure inclined surface (19); and a guide sleeve (2) slidably connected to the outer wall of the linkage rod (3) is fixedly mounted on the outer sides of the upper mounting frame (1) and the lower mounting frame (7).

9. The inflatable cake packaging equipment according to claim 3, characterized in that: One end of one of the air pipes (8) is connected to the air pump via a pipeline, and the other air pipe (8) is connected to the outside air via a pipeline. A one-way air outlet valve is installed on the air pipe (8) connected to the outside.

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