Food box type packaging sealing mechanism and sealing process thereof

Abstract

The application relates to the field of food packaging technology, and particularly discloses a food box type packaging sealing mechanism and a sealing process thereof, which comprises a machine base, a sliding hole is formed in the middle end of the top of the machine base in the length direction, two L-shaped rotating plates are movably arranged in the sliding hole, mounting holes are formed in the side surfaces of the rotating plates, a conveying belt is arranged in the mounting holes, an electric telescopic rod is arranged at each end of the top of the rotating plate, an adjusting plate is arranged at the top end of the electric telescopic rod, a protection groove is formed in the side of the opposite faces of the two adjusting plates, a connecting groove is formed in the inner top of the protection groove, a fixing plate is arranged in the protection groove, and the top end of the fixing plate is arranged in the connecting groove. When the food box is sealed, the hot melt adhesive and the adhesive tape can be used in different ways to simultaneously seal the food box, the sealing effect of the food box is improved, and the food box is prevented from being directly broken at the sealing position due to the damage of the adhesive tape caused by friction.

Description

Technical Field

[0001] This invention relates to the field of food packaging technology, and in particular to a food box packaging sealing mechanism and its sealing process. Background Technology

[0002] Packaging is a general term for auxiliary materials used to protect products during distribution, facilitate storage and transportation, and promote sales. In food processing and production, food is first placed in a preservation bag, and then the preservation bag is placed in a food box of a specified size. In order to protect the food and achieve better sealing, the sealing method of common food box packaging sealing equipment is mostly to use tape to stick the folded lids on both sides of the top of the food box to achieve a seal. However, the tape is located on the outside of the food box, which can easily lead to external damage, and the tape may fall off due to external dust, water mist, etc.

[0003] Existing sealing equipment uses only a single sealing method. When sealing with tape, the smaller folding caps at the top two ends of the food box cannot be fixed to the folding caps on both sides, causing the folding caps at both ends to rotate inside the food box, resulting in a poor sealing effect. When sealing with hot melt adhesive, only the areas where hot melt adhesive is applied to the folding caps can be effectively fixed, while the remaining edges of the folding caps cannot be properly connected and fixed, which can lead to the edges of the folding caps lifting or cracking during use. It is impossible to perform multiple sealing methods simultaneously. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a food box packaging sealing mechanism and its sealing process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A food box packaging sealing mechanism and its sealing process include a base. A sliding hole is formed at the top center of the base along its length. Two L-shaped rotating plates are movably installed inside the sliding hole. Mounting holes are formed on the sides of the rotating plates, and a conveyor belt is installed inside the mounting holes. Electric telescopic rods are installed at both ends of the top of the rotating plates. Adjusting plates are installed at the top of the electric telescopic rods. Protective grooves are formed on the side of the two adjusting plates closest to their opposite faces. A connecting groove is formed at the top of the inner side of the protective groove. A fixing plate is installed inside the protective groove. The top of the fixing plate is located inside the connecting groove and is fitted with a third electric rotating shaft. The two ends of the third electric rotating shaft are rotatably mounted on the inner walls of both sides of the connecting groove. An mounting groove is formed on the side of the fixing plate closest to the inner wall of the protective groove, and several hot melt nozzles are installed on the inner wall of the mounting groove.

[0006] Preferably, a housing is installed on the top of the base, and the bottom ends of the housing are respectively installed on the two sides of the base. A first electric rotating shaft is rotatably installed on the inner wall of the housing. Fixed sleeves are respectively installed at both ends of the outer wall of the first electric rotating shaft. Rotating rods are installed at both ends of the outer wall of the fixed sleeves. A positioning groove is opened at the end of the rotating rod away from the fixed sleeve, and a positioner is installed inside the positioning groove.

[0007] Preferably, a weight is rotatably mounted on the outer wall of the first electric rotating shaft between two fixed sleeves. A semi-cylindrical cleaning cotton block is mounted on the bottom of the weight. A storage groove is provided on the side of the weight. An installation rod is installed on the inner wall of the storage groove. A conveying hole is provided at the bottom of the storage groove along the length direction. The bottom end of the conveying hole penetrates one side of the outer wall of the cleaning cotton block. A fixing groove is provided on the side of the outer wall of the cleaning cotton block away from the conveying hole along the length direction. A cutting rack is installed inside the fixing groove. The side of the cutting rack near the rack penetrates the fixing groove.

[0008] Preferably, a hot melt chamber is installed on the side of the adjusting plate away from the protective groove. The hot melt chamber is interconnected with several hot melt nozzles through high-temperature resistant hoses. A placement groove is opened at the bottom of the fixing plate. A cleaning roller is installed inside the placement groove. The two ends of the cleaning roller are rotatably installed on the inner walls of the two ends of the placement groove. First air jets are installed on both sides of the bottom of the fixing plate located in the placement groove. A protective pad is installed on the inner wall of the protective groove.

[0009] Preferably, a fourth electric rotating shaft and a support shaft are respectively installed at both ends of the inner side of the conveyor belt. Both ends of the fourth electric rotating shaft and the support shaft are rotatably mounted on the inner wall of the mounting hole. A transmission roller is installed on the outer wall of both the support shaft and the fourth electric rotating shaft, and the outer wall of the transmission roller abuts against the inner wall of the conveyor belt.

[0010] Preferably, the inner walls on both sides of the sliding hole are provided with sliding grooves along the length direction, and the bottom ends of the two rotating plates are each equipped with a second electric rotating shaft. Both ends of the second electric rotating shaft are rotatably equipped with electric sliders, and the two electric sliders are respectively slidably installed inside the two sliding grooves.

[0011] Preferably, the inner bottom of the base has several arc-shaped grooves on both sides of the sliding hole, and the inner bottom of the grooves has a drain hole along the length direction. Several first support rods matching the grooves are installed on the inner walls of both sides of the base. A rotating rod is rotatably installed on the outer wall of the first support rod, and the bottom end of the outer wall of the rotating rod is located inside the groove.

[0012] Preferably, the top two sides of the base are provided with a plurality of limiting grooves, the bottom of the limiting grooves are provided with a slot, and C-shaped flow guides are installed on both sides of the inside of the base. The two ends of the flow guides are respectively installed inside the two limiting grooves on the same side, and the bottom of both ends of the flow guides are provided with a block, which is located inside the slot.

[0013] Preferably, several screw holes are provided at the bottom of both sides of the housing. One end of the screw hole penetrates the side of the housing and the base. A fixing bolt is installed in the internal thread of the screw hole. A second jet head is installed at the top of the inner wall of both sides of the housing. The second jet head is located above the first electric rotating shaft and the rotating plate. A controller is installed on the side of the housing.

[0014] The sealing process of a food box packaging sealing mechanism according to the present invention includes the following steps: Step 1: Cover the inside of the conveyor hole with sealing tape, and remove one end of the tape from the conveyor hole. Place the hot melt rod inside the hot melt chamber. Place the food box on several rotating rollers at the top of the machine base. The conveyor belt away from the machine casing moves the food box between two rotating plates. The two rotating plates rotate and clamp the food box while moving the food box. Step 2: The two fixed plates rotate and push the folding lids at both ends of the food box to rotate. The cleaning roller cleans the surface of the folding lids. The electric telescopic rod drives the fixed plates to press down on the folding lids through the adjustment plate, and several hot melt nozzles apply hot melt adhesive to the surface of the folding lids. Step 3: The rotating plate near the machine housing rotates into the sliding hole, and another rotating plate pushes the food box to the top of the conveyor belt on the rotating plate inside the sliding hole. Then, it moves away from the machine housing, and the rotating plate inside the sliding hole drives the food box to move into the machine housing. Step 4: The two second jet nozzles push the folding covers on both sides of the top of the food box to fold and clean the surface dust. The end of the rotating rod away from the first electric rotating shaft rotates to the surface of the folding covers on both sides of the top of the food box and presses the folding covers down to the designated position. The folding covers at both ends of the top of the food box are glued to the folding covers on both sides with hot melt adhesive. Step 5: Push the cleaning cotton pad into the food container. The cleaning cotton pad moves on the top of the food container and cleans the sealing area. As the cleaning cotton pad moves, the tape seals the folded lid sealing areas on both sides of the top of the food container. When the cleaning cotton pad moves out of the top of the food container and rotates, the cutting toothed strip cuts the tape.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In this invention, food boxes can be sealed simultaneously using hot melt adhesive and tape. The two folded caps at the top of the food box are bonded to the two side folded caps with hot melt adhesive, preventing the two side folded caps from rotating freely inside the food box. This also improves the sealing effect of the food box and prevents the seal from breaking open due to friction damage of the tape during use. It can improve the overall adhesion and stability of the food box seal. At the same time, the sealing area can be cleaned in real time during sealing to prevent the tape adhesion from decreasing due to surface dust. Furthermore, it can seal food boxes of different sizes, heights, and widths, and has good versatility and wide applicability.

[0016] In this invention, after the fixing plate presses down and releases the folding covers at both ends of the top of the food box, the folding covers will rotate due to their own elasticity. When the rotating rod presses down, the folding covers on both sides of the top of the food box will also be pressed down, and they will be bonded together by hot melt adhesive. When the folding covers on both sides of the top of the food box are not pressed down, the airflow from the second jet nozzle blows towards the sides of the folding covers. When the folding covers are not pressed down, they will block the hot melt adhesive on the folding covers at both ends, and will not allow the airflow to blow towards the hot melt adhesive. When the folding covers on both sides are pressed down, they will rub against the surfaces of the folding covers at both ends, making the contact area between the hot melt adhesive and the folding covers at both ends and the folding covers on both sides larger, resulting in a better bonding effect. After the folding covers are bonded, the airflow from the second jet nozzle will blow towards the gap and surface between the two folding covers on the top of the food box. Because the airflow is blown out at an angle, it will also blow the hot melt adhesive through the gap between the folding covers on both sides and the folding covers at both ends, improving the solidification efficiency of the hot melt adhesive.

[0017] In this invention, the two rotating plates change position according to the location of the food box and different sealing processes. When the food box to be sealed is placed, the rotating plate near the machine housing is perpendicular to the machine base and positions the food box being transported. The other rotating plate is located inside the sliding hole and is used to transport the food box. When applying hot melt adhesive to the food box, the two rotating plates are located on both ends of the food box to clamp the food box and apply the hot melt adhesive. When the food box is transported into the machine housing, the rotating plate near the machine housing is located inside the sliding hole for transporting the food box, while the other rotating plate pushes the food box to move. In use, the two rotating plates can respectively perform transporting, positioning, and clamping. The distance between the two rotating plates can also be adjusted according to different sizes of food boxes.

[0018] In this invention, when the food box is sealed, the end of the rotating rod near the locator is located on one side of the food box. The first electric rotating shaft drives the rotating rod to rotate, causing the rotating rod to push the sealed food box to move on several rotating rollers until it is removed from the machine base. In use, the rotating rod can be used to position and stop the food box during conveying, and can also press down and seal the folding covers on both sides of the top of the food box. At the same time, it can also push the sealed food box to discharge. Attached Figure Description

[0019] Figure 1 This is a perspective view of a food box packaging sealing mechanism and its sealing process proposed in this invention; Figure 2 This is a schematic diagram of the rotating plate installation structure of a food box packaging sealing mechanism and its sealing process proposed in this invention. Figure 3 This is a schematic diagram of the base structure of a food box packaging sealing mechanism and its sealing process proposed in this invention; Figure 4 This is a schematic diagram of the conveyor belt installation structure of a food box packaging sealing mechanism and its sealing process proposed in this invention. Figure 5 This is a schematic diagram of the fixing plate installation structure of a food box packaging sealing mechanism and its sealing process proposed in this invention; Figure 6 This is a schematic diagram of the rotating plate structure of a food box packaging sealing mechanism and its sealing process proposed in this invention. Figure 7 This is a schematic diagram of the fixed plate structure of a food box packaging sealing mechanism and its sealing process proposed in this invention; Figure 8 This is a schematic diagram of the first electric rotating shaft structure of a food box packaging sealing mechanism and sealing process proposed in this invention. Figure 9 This is a partial cross-sectional view of the weight block of a food box packaging sealing mechanism and sealing process proposed in this invention; Figure 10 This is a schematic diagram of the flow guide structure of a food box packaging sealing mechanism and its sealing process proposed in this invention.

[0020] In the diagram: 1. Base; 2. Housing; 3. Rotating plate; 4. First electric rotating shaft; 5. Limiting groove; 6. First support rod; 7. Rotating roller; 8. Sliding hole; 9. Conveyor belt; 10. Adjusting plate; 11. Weight block; 12. Controller; 13. Flow guide frame; 14. Slide groove; 15. Fixing bolt; 16. Slot; 17. Screw hole; 18. Groove; 19. Drain hole; 20. Cutting rack; 21. Electric slider; 22. Mounting hole; 23. Hot melt chamber; 24. Electric telescopic rod; 25. Locking block; 26. Second electric... 27. Moving shaft; 28. Protective groove; 29. ​​Fixing plate; 20. Third electric rotating shaft; 30. Protective pad; 31. Cleaning roller; 32. Connecting groove; 33. Fourth electric rotating shaft; 34. Support shaft; 35. Transmission roller; 36. Mounting groove; 37. Hot melt nozzle; 38. Fixing groove; 39. Placement groove; 40. Conveying hole; 41. First air nozzle; 42. Fixing sleeve; 43. Cleaning cotton block; 44. Rotating rod; 45. Positioning groove; 46. Positioner; 47. Storage groove; 48. Mounting rod; 49. Second air nozzle. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] Reference Figure 1-10A food box packaging sealing mechanism and its sealing process are disclosed. The mechanism includes a base 1. A sliding hole 8 is provided at the top center of the base 1 along its length. Two L-shaped rotating plates 3 are movably installed inside the sliding hole 8. Mounting holes 22 are provided on the sides of the rotating plates 3. A conveyor belt 9 is installed inside the mounting holes 22. Electric telescopic rods 24 are installed at both ends of the top of the rotating plates 3. Adjusting plates 10 are installed at the top of the electric telescopic rods 24. Protective grooves 27 are provided on the side of the two adjusting plates 10 near their opposite faces. A connecting groove 32 is provided at the top of the inner side of the protective groove 27. A fixing plate 28 is installed inside the protective groove 27. The top of the fixing plate 28 is located inside the connecting groove 32 and a third electric rotating shaft 29 is installed thereon. The two ends of the third electric rotating shaft 29 are respectively rotatably installed on the inner walls of the two sides of the connecting groove 32. A mounting groove 36 is provided on the side of the fixing plate 28 near the inner wall of the protective groove 27. Several hot melt nozzles 37 are installed on the inner wall of the mounting groove 36.

[0024] As a technical optimization of the present invention, a housing 2 is installed on the top of the base 1. The bottom ends of the housing 2 are respectively installed on the two sides of the base 1. A first electric rotating shaft 4 is rotatably installed on the inner wall of the housing 2. Fixed sleeves 42 are respectively installed at both ends of the outer wall of the first electric rotating shaft 4. Rotating rods 44 are installed at both ends of the outer wall of the fixed sleeves 42. A positioning groove 45 is opened at the end of the rotating rod 44 away from the fixed sleeves 42. A positioner 46 is installed inside the positioning groove 45. In use, the controller 12 is electrically connected to the first electric rotating shaft 4, the second electric rotating shaft 26, the third electric rotating shaft 29, the fourth electric rotating shaft 33, the positioner 46, the hot melt nozzle 37, the first air nozzle 41 and the second air nozzle 49. The controller 12 can be used to control and input parameters. When the positioner 46 rotates to the designated position with the rotating rod 44, it stops moving and is sealed by the folding cover on both sides of the top of the food box.

[0025] As a technical optimization of the present invention, a weight block 11 is rotatably mounted on the outer wall of the first electric rotating shaft 4 between two fixed sleeves 42. A semi-cylindrical cleaning cotton block 43 is mounted on the bottom of the weight block 11. A storage groove 47 is opened on the side of the weight block 11. An installation rod 48 is installed on the inner wall of the storage groove 47. A conveying hole 40 is opened at the bottom of the storage groove 47 in the length direction. The bottom end of the conveying hole 40 penetrates one side of the outer wall of the cleaning cotton block 43. A fixing groove 38 is opened in the length direction on the side of the outer wall of the cleaning cotton block 43 away from the conveying hole 40. A cutting rack 20 is installed inside the fixing groove 38. The side of the cutting rack 20 near the tooth groove penetrates the fixing groove 38. When the weight block 11 and the cleaning cotton block 43 move from the top of the food box to both ends, the cleaning cotton block 43 and the weight block 11 rotate towards the machine base 1 by their own weight. The cutting rack 20 can then cut the tape. A piece of tape remains at the bottom of the cleaning cotton block 43, which is convenient for sealing the food box later.

[0026] As a technical optimization of the present invention, a hot melt chamber 23 is installed on the side of the adjusting plate 10 away from the protective groove 27. The hot melt chamber 23 is interconnected with several hot melt nozzles 37 through high-temperature resistant hoses. A placement groove 39 is opened at the bottom end of the fixing plate 28. A cleaning roller 31 is installed inside the placement groove 39. The two ends of the cleaning roller 31 are respectively rotatably installed on the inner walls of the two ends of the placement groove 39. First air nozzles 41 are installed on both sides of the bottom end of the fixing plate 28 located in the placement groove 39. A protective pad 30 is installed on the inner wall of the protective groove 27. When the fixing plate 28 rotates, the cleaning roller 31 rotates to clean the surface of the folded cover at both ends of the top of the food box and the hot melt adhesive application area, while pushing the folded cover to rotate.

[0027] As a technical optimization of the present invention, a fourth electric rotating shaft 33 and a support shaft 34 are respectively installed at both ends of the inner side of the conveyor belt 9. Both ends of the fourth electric rotating shaft 33 and the support shaft 34 are rotatably mounted on the inner wall of the mounting hole 22. A transmission roller 35 is installed on the outer wall of both the support shaft 34 and the fourth electric rotating shaft 33. The outer wall of the transmission roller 35 abuts against the inner wall of the conveyor belt 9. When in use, the fourth electric rotating shaft 33 can drive the conveyor belt 9 to rotate, which facilitates the conveying of food boxes. At the same time, the two sides of the conveyor belt 9 are relatively soft when in use. When the food box is clamped by the conveyor belt 9 on the two rotating plates 3, it can play a good protective role. It can also play a good buffering role when the food box collides with the conveyor belt 9 during conveying.

[0028] As a technical optimization of the present invention, sliding grooves 14 are provided on both sides of the inner wall of the sliding hole 8 along the length direction. A second electric rotating shaft 26 is installed at the bottom of each of the two rotating plates 3. Electric sliders 21 are rotatably installed at both ends of the second electric rotating shaft 26. The two electric sliders 21 are slidably installed inside the two sliding grooves 14 respectively. The second electric rotating shaft 26 and the electric sliders 21 cooperate with each other. When in use, the second electric rotating shaft 26 can adjust the angle of the rotating plate 3, so that the conveyor belt 9 can switch between conveying and clamping functions for clamping food boxes, applying hot melt adhesive, sealing the folded caps at both ends, and positioning. When in use, the electric sliders 21 can adjust the overall position of the rotating plate 3, and adjust the distance between the two rotating plates 3 according to the overall specifications of the food box. It also facilitates the movement of the two rotating plates 3 when clamping the food box.

[0029] As a technical optimization of the present invention, the inner bottom of the base 1 is provided with several arc-shaped grooves 18 on both sides of the sliding hole 8. The inner bottom of the grooves 18 is provided with a drain hole 19 along the length direction. Several first support rods 6 matching the grooves 18 are installed on the inner walls of both sides of the base 1. A rotating rod 7 is rotatably installed on the outer wall of the first support rod 6. The bottom end of the outer wall of the rotating rod 7 is located inside the groove 18. When in use, the several rotating rods 7 can support the bottom sides of food boxes of different sizes, thereby improving the stability of the food boxes during transportation.

[0030] As a technical optimization of the present invention, several limiting grooves 5 are provided on both sides of the top of the base 1, and a slot 16 is provided at the bottom of the inner side of the limiting groove 5. C-shaped flow guides 13 are installed on both sides of the inner side of the base 1. The two ends of the flow guides 13 are respectively installed inside the two limiting grooves 5 on the same side. The bottom of both ends of the flow guides 13 are equipped with a locking block 25, which is located inside the slot 16. When sealing the food box, the staff can replace the two flow guides 13 according to the specifications and width of the food box, so that it can play a good guiding and limiting role when sealing food boxes of different specifications.

[0031] As a technical optimization of the present invention, several screw holes 17 are provided at the bottom of both sides of the housing 2. One end of the screw hole 17 penetrates the side of the housing 2 and the base 1. The screw hole 17 is threaded with a fixing bolt 15. The top of the inner wall of both sides of the housing 2 is equipped with a second jet head 49. The second jet head 49 is located above the first electric rotating shaft 4 and the rotating plate 3. The controller 12 is installed on the side of the housing 2. When the folding covers at both ends of the top of the food box bend into the food box and move into the housing 2, the two second jet heads 49 can blow the folding covers on both sides of the top of the food box, so that the folding covers on both sides of the top of the food box also bend into the food box, so that the rotating rod 44 can press down the folding covers to seal them. At the same time, the airflow blown out by the second jet head 49 can also clean the dust on the surface of the folding covers, which is convenient for subsequent sealing.

[0032] The sealing process of a food box packaging sealing mechanism according to the present invention includes the following steps: Step 1: Cover the sealing tape inside the conveying hole 40, with one end of the tape extending out of the conveying hole 40. Place the hot melt rod inside the hot melt chamber 23. Place the food box on several rotating rollers 7 at the top of the machine base 1. The conveyor belt 9 away from the machine housing 2 moves the food box between two rotating plates 3. The two rotating plates 3 rotate and clamp the food box while moving it. Step 2: The two fixed plates 28 rotate and push the folding lids at both ends of the food box to rotate. The cleaning roller 31 cleans the surface of the folding lid. The electric telescopic rod 24 drives the fixed plates 28 to press down on the folding lid through the adjusting plate 10, and several hot melt nozzles 37 apply hot melt adhesive to the surface of the folding lid. Step 3: The rotating plate 3 near the housing 2 rotates into the sliding hole 8. Another rotating plate 3 pushes the food box to the top of the conveyor belt 9 on the rotating plate 3 inside the sliding hole 8, and then moves away from the housing 2. The rotating plate 3 inside the sliding hole 8 drives the food box to move into the housing 2. Step 4: The two second jet nozzles 49 push the folding covers on both sides of the top of the food box to fold and clean the surface dust. The end of the rotating rod 44 away from the first electric rotating shaft 4 rotates to the surface of the folding covers on both sides of the top of the food box and presses the folding covers down to the designated position. The folding covers at both ends of the top of the food box are glued to the folding covers on both sides with hot melt adhesive. Step 5: The food box pushes the cleaning cotton pad 43, which moves on the top of the food box and cleans the sealing position. As the cleaning cotton pad 43 moves, the tape seals the folded lid sealing positions on both sides of the top of the food box. When the cleaning cotton pad 43 moves out of the top of the food box and rotates, the cutting toothed strip 20 cuts the tape.

[0033] In use, the operator first places a certain amount of hot melt rods inside the hot melt chamber 23, and simultaneously installs sealing tape on the mounting rod 48, with one end of the tape passing through the conveying hole 40. The electric slider 21 near the housing 2 drives the rotating plate 3 to rotate, causing the rotating plate 3 to move out of the sliding hole 8 and perpendicular to the bottom of the base 1. Workers manually or via conveyor belt transport the food boxes to be sealed into the machine base 1, ensuring that the bottom of the food box is positioned on top of the rotating plate 3, away from the machine housing 2. The conveyor belt 9 on the rotating plate 3 abuts against the bottom of the food box. Several rotating rollers 7 located on both sides of the bottom of the machine base 1 provide good support for the bottom sides of the food box, making the transport of the food box less strenuous. The electric slider 21 moves the food box towards the machine housing 2 via the rotating plate 3 and the conveyor belt 9 until one end of the food box abuts against the conveyor belt 9 on the rotating plate 3, which is close to the machine housing 2. The rotating plate 3 then moves the adjusting plate 10 up and down via the electric telescopic rod 24, allowing for real-time adjustment according to the height of different sized food boxes.

[0034] The third electric rotating shaft 29 drives the fixing plate 28 to rotate, causing the fixing plate 28 to move out of the protective groove 27. At the same time, it rotates towards the folding cover at the top of the food box near the end of the casing 2. When the fixing plate 28 rotates, it can push the folding cover to rotate inwards into the food box. The cleaning roller 31 located on the fixing plate 28 rolls on the surface of the folding cover as the fixing plate 28 rotates, cleaning the dust on the surface of the folding cover. Meanwhile, the first air jet 41 cleans the floating dust at both ends of the surface of the folding cover, making it easier to apply hot melt adhesive to the surface of the folding cover. When the fixed plate 28 rotates to be perpendicular to the adjusting plate 10, the electric telescopic rod 24 drives the fixed plate 28 to move down through the adjusting plate 10 until the side of the fixed plate 28 near the mounting groove 36 abuts against the top of the food box. At the same time, the folding cover is perpendicular to the inner wall of the food box. The rotating plate 3 away from the housing 2 can then be moved out of the bottom of the food box by the electric slider 21, and rotated and moved to one side of the food box by the second electric rotating shaft 26 and the electric slider 21. The fixed plate 28 at its top moves in the same way as the fixed plate 28 near the housing 2, until the two fixed plates 28 abut against the two folding covers at the top of the food box. The two rotating plates 3 can clamp the food box well. At the same time, the electric slider 21 drives the food box to move synchronously during clamping, improving the sealing efficiency of the food box.

[0035] The hot melt chamber 23 heats the hot melt rods inside at high temperature and delivers hot melt adhesive to several hot melt nozzles 37. The fixing plates 28 on the folding lids at both ends of the two food boxes apply hot melt adhesive to the surface of the folding lids through the hot melt nozzles 37. The electric telescopic rod 24 drives the adjusting plate 10 to rise, while two third electric rotating shafts 29 rotate the fixing plate 28 into the protective groove 27. The rotating plate 3 near the housing 2 rotates through its second electric rotating shaft 26 into the sliding hole 8, while another rotating plate 3 pushes the food box towards the housing 2 via its electric slider 21, moving the bottom of the food box onto the rotating plate 3 closest to the housing 2. During use, guide frames 13 are installed on both sides inside the base 1. Operators replace the guide frames 13 according to different food box specifications, ensuring that the food box is positioned between the two guide frames 13 after moving into the base 1, providing good guidance and clamping for the food box. During use, the rotating plate 3 near the housing 2 conveys the food box at the bottom of the food box, while another rotating plate 3 located at the end of the food box away from the housing 2 pushes the food box to move. The guide frames 13 on both sides protect and guide the food box on both sides during conveyance.

[0036] When the food box is conveyed into the housing 2, the second jet nozzles 49 located at the top of the inner walls on both sides of the housing 2 spray air towards the folded lids on both sides of the top of the food box, causing the folded lids on both sides of the top of the food box to rotate inwards. This helps to clean the surface dust of the folded lids during use, facilitating subsequent sealing with tape. During use, one end of the food box abuts against the rotating rod 44 below the first electric rotating shaft 4, stopping the food box's movement. The rotating rod 44, located above the first electric rotating shaft 4, can then rotate via the first electric rotating shaft 4 to the surface of the folded lids on both sides of the top of the food box. Operators can adjust the rotation angle and position of the end of the rotating rod 44 near the positioner 46 according to the height of different food box sizes using the positioner 46 and controller 12 on the rotating rod 44. During use, the end of the rotating rod 44 near the positioner 46 presses down on the folding covers on both sides of the top of the food box until the folding covers are perpendicular to the inner wall of the food box. At the same time, after the fixing plate 28 presses down on and releases the folding covers at both ends of the top of the food box, the elasticity of the folding covers will cause them to rotate at a small angle. The folding covers on both sides of the top of the food box will be pressed down by the rotating rod 44 and bonded together by hot melt adhesive. When the folding covers on both sides of the top of the food box are not pressed down, the airflow from the second jet nozzle 49 blows towards the folding covers on both sides. On the sides, when the two side folding covers are not pressed down, they will block the hot melt adhesive on the two end folding covers and will not allow the airflow to blow towards the hot melt adhesive. When the two side folding covers are pressed down, they will rub against each other with the surfaces of the two end folding covers, making the contact area between the hot melt adhesive and the two end folding covers and the two side folding covers larger and the bonding effect better. After the folding covers are bonded, the airflow blown by the second jet head 49 will blow towards the gap and surface between the two side folding covers at the top of the food box. Because the airflow is blown out at an angle, it will also blow the hot melt adhesive through the gap between the two side folding covers and the two end folding covers, improving the solidification efficiency of the hot melt adhesive.

[0037] During transport, one end of the food box abuts against the bottom side of the cleaning pad 43 and the weight block 11. As the food box moves, the cleaning pad 43 rotates from one side to the top and slides on top, adhering to the tape at its bottom. As the cleaning pad 43 moves, the tape seals the openings of the folding lids on both sides of the top of the food box. During sealing, the end of the rotating rod 44 near the positioner 46 remains in contact with the top of the folding lids. When the cleaning pad 43 rotates from the top to one side, the cutting rack 20 cuts the tape, leaving some tape at the bottom for sealing the remaining food boxes. When the cleaning cotton pad 43 slides on the top of the food box, because the bottom end of the delivery hole 40 is located near the bottom of the outer wall of the cleaning cotton pad 43, when the cleaning cotton pad 43 slides at an angle on the top of the food box, the position on the side of the cleaning cotton pad 43 near the drop block 11 can wipe the top of the two folding covers on the top of the food box, so that the sealing effect of the tape is better and the tape will not fall off due to excessive dust. In addition, the two folding covers on both sides are bonded to each other with hot melt adhesive, so that the two folding covers on both sides cannot be rotated inside the food box. Moreover, the stability of the four folding covers bonded together is better than that of the two folding covers bonded together, and the seal will not break due to excessive weight inside the food box.

[0038] When the food box is sealed, the end of the rotating rod 44 near the positioner 46 is located on one side of the food box. The first electric rotating shaft 4 drives the rotating rod 44 to rotate, so that the rotating rod 44 pushes the sealed food box to move on several rotating rollers 7 until it is removed from the machine base 1. In use, the rotating rod 44 can be used to position and stop the food box in the conveyor, press down and seal the folding cover on both sides of the top of the food box, and push the sealed food box to discharge.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A food box packaging sealing mechanism, comprising a base (1), characterized in that, The base (1) has a sliding hole (8) at the top center along its length. Two L-shaped rotating plates (3) are movably installed inside the sliding hole (8). The rotating plates (3) have mounting holes (22) on their sides. A conveyor belt (9) is installed inside the mounting holes (22). Electric telescopic rods (24) are installed at both ends of the top of the rotating plates (3). An adjusting plate (10) is installed at the top of the electric telescopic rods (24). A protective groove (27) is provided on the side of the two adjusting plates (10) closest to their opposite surfaces. A connecting groove (32) is provided at the top of the inner part of the groove (27). A fixing plate (28) is installed inside the protective groove (27). The top of the fixing plate (28) is located inside the connecting groove (32) and a third electric rotating shaft (29) is installed thereon. The two ends of the third electric rotating shaft (29) are respectively rotatably installed on the inner walls of the two sides of the connecting groove (32). An installation groove (36) is provided on the side of the fixing plate (28) near the inner wall of the protective groove (27). Several hot melt nozzles (37) are installed on the inner wall of the installation groove (36).

2. The food box packaging sealing mechanism according to claim 1, characterized in that, A housing (2) is installed on the top of the base (1). The bottom ends of the housing (2) are respectively installed on the two sides of the base (1). A first electric rotating shaft (4) is rotatably installed on the inner wall of the housing (2). Fixed sleeves (42) are respectively installed on both ends of the outer wall of the first electric rotating shaft (4). Rotating rods (44) are installed on both ends of the outer wall of the fixed sleeves (42). A positioning groove (45) is opened at the end of the rotating rod (44) away from the fixed sleeve (42). A locator (46) is installed inside the positioning groove (45).

3. The food box packaging sealing mechanism according to claim 2, characterized in that, The outer wall of the first electric rotating shaft (4) is rotatably mounted with a weight block (11) between two fixed sleeves (42). A semi-cylindrical cleaning cotton block (43) is installed at the bottom of the weight block (11). A storage groove (47) is opened on the side of the weight block (11). An installation rod (48) is installed on the inner wall of the storage groove (47). A conveying hole (40) is opened at the bottom of the storage groove (47) in the length direction. The bottom end of the conveying hole (40) penetrates one side of the outer wall of the cleaning cotton block (43). A fixing groove (38) is opened in the length direction on the side of the outer wall of the cleaning cotton block (43) away from the conveying hole (40). A cutting rack (20) is installed inside the fixing groove (38). The side of the cutting rack (20) close to the tooth groove penetrates the fixing groove (38).

4. The food box packaging sealing mechanism according to claim 1, characterized in that, A hot melt chamber (23) is installed on the side of the adjusting plate (10) away from the protective groove (27). The hot melt chamber (23) and several hot melt nozzles (37) are interconnected through high-temperature resistant hoses. A placement groove (39) is opened at the bottom of the fixing plate (28). A cleaning roller (31) is installed inside the placement groove (39). The two ends of the cleaning roller (31) are rotatably installed on the inner walls of the two ends of the placement groove (39). A first jet nozzle (41) is installed on both sides of the bottom of the fixing plate (28) located in the placement groove (39). A protective pad (30) is installed on the inner wall of the protective groove (27).

5. The food box packaging sealing mechanism according to claim 1, characterized in that, The inner ends of the conveyor belt (9) are respectively equipped with a fourth electric rotating shaft (33) and a support shaft (34). Both ends of the fourth electric rotating shaft (33) and the support shaft (34) are rotatably mounted on the inner wall of the mounting hole (22). Both the outer walls of the support shaft (34) and the fourth electric rotating shaft (33) are equipped with transmission rollers (35). The outer wall of the transmission rollers (35) abuts against the inner wall of the conveyor belt (9).

6. The food box packaging sealing mechanism according to claim 1, characterized in that, The sliding hole (8) has a sliding groove (14) on both sides of the inner wall along the length direction. The bottom of the two rotating plates (3) is equipped with a second electric rotating shaft (26). Both ends of the second electric rotating shaft (26) are rotatably equipped with electric sliders (21). The two electric sliders (21) are slidably installed inside the two sliding grooves (14).

7. The food box packaging sealing mechanism according to claim 1, characterized in that, The bottom of the base (1) is provided with several arc-shaped grooves (18) on both sides of the sliding hole (8). The bottom of the groove (18) is provided with a drain hole (19) along the length direction. Several first support rods (6) matching the grooves (18) are installed on the inner walls of both sides of the base (1). A rotating rod (7) is rotatably installed on the outer wall of the first support rod (6). The bottom end of the outer wall of the rotating rod (7) is located inside the groove (18).

8. A food box packaging sealing mechanism according to claim 1, characterized in that, The base (1) has several limiting grooves (5) on both sides of the top. The bottom of the limiting groove (5) has a slot (16). C-shaped guide frames (13) are installed on both sides of the base (1). The two ends of the guide frame (13) are installed in the two limiting grooves (5) on the same side. The bottom of both ends of the guide frame (13) is equipped with a block (25). The block (25) is located inside the slot (16).

9. A food box packaging sealing mechanism according to claim 2, characterized in that, The bottom of both sides of the housing (2) is provided with several screw holes (17). One end of the screw hole (17) passes through the side of the housing (2) and the base (1). The screw hole (17) is threaded with a fixing bolt (15). The top of the inner wall of both sides of the housing (2) is provided with a second jet head (49). The second jet head (49) is located above the first electric rotating shaft (4) and the rotating plate (3). The side of the housing (2) is provided with a controller (12).

10. The sealing process of a food box packaging sealing mechanism as described in any one of claims 1-9, characterized in that, The sealing process includes the following steps: Step 1: Place the sealing tape inside the conveying hole (40), and move one end of the tape out of the conveying hole (40). Place the hot melt rod inside the hot melt chamber (23). Place the food box on several rotating rollers (7) at the top of the machine base (1). The conveyor belt (9) away from the machine casing (2) drives the food box to move between the two rotating plates (3). The two rotating plates (3) rotate and clamp the food box while driving the food box to move. Step 2: The two fixed plates (28) rotate and push the folding lids at both ends of the food box to rotate. The cleaning roller (31) cleans the surface of the folding lid. The electric telescopic rod (24) drives the fixed plate (28) to press down on the folding lid through the adjusting plate (10), and several hot melt nozzles (37) apply hot melt adhesive to the surface of the folding lid. Step 3: The rotating plate (3) near the housing (2) rotates to the inside of the sliding hole (8), and another rotating plate (3) pushes the food box to the top of the conveyor belt (9) on the rotating plate (3) inside the sliding hole (8), and then moves away from the housing (2). The rotating plate (3) inside the sliding hole (8) drives the food box to move into the housing (2). Step 4: The two second jet nozzles (49) push the folding covers on both sides of the top of the food box to fold and clean the surface dust. The end of the rotating rod (44) away from the first electric rotating shaft (4) rotates to the surface of the folding covers on both sides of the top of the food box and presses the folding covers down to the designated position. The folding covers at both ends of the top of the food box are glued to the folding covers on both sides with hot melt adhesive. Step 5: Push the cleaning cotton block (43) in the food box. The cleaning cotton block (43) moves on the top of the food box and cleans the sealing position. The tape seals the folded lid sealing positions on both sides of the top of the food box as the cleaning cotton block (43) moves. When the cleaning cotton block (43) moves out of the top of the food box and rotates, the cutting toothed strip (20) cuts the tape.

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