A vacuum sealing mechanism for automatic packaging of roasted nuts and seeds

Abstract

This invention belongs to the field of vacuum packaging technology for roasted nuts and seeds, and particularly relates to a vacuum sealing mechanism for automatic packaging of roasted nuts and seeds. It includes a base, a connecting plate rotatably mounted on top of the base, and three sets of fixing components evenly distributed along its circumference on the connecting plate. Each fixing component has a U-shaped fixing frame, a binding mechanism on the U-shaped fixing frame, and a heat-sealing component on the binding mechanism. This invention eliminates the material transfer waiting time between traditional multi-station operations, reduces the complexity of signal coordination and control and equipment debugging between traditional multi-station operations, improves the stability and packaging efficiency of the equipment in high-speed production, and forms a three-dimensional constraint of bottom support, middle compression, and top limiting when shaping the packaged bag after filling. This solves the problem of uneven pressure on roasted nut and seed particles leading to looseness and large thickness differences, thus improving the packaging quality after sealing.

Description

Technical Field

[0001] This invention belongs to the field of vacuum packaging technology for roasted nuts and seeds, and particularly relates to a vacuum sealing mechanism for automatic packaging of roasted nuts and seeds. Background Technology

[0002] In the roasted nuts and seeds processing industry, the application of automated packaging equipment has become a key link in improving production efficiency. Among them, vacuum sealing, as a core process to ensure the shelf life and quality of roasted nuts and seeds, places high demands on the coordination and stability of the equipment. At present, mainstream automated packaging production lines for roasted nuts and seeds usually adopt a multi-station step-by-step operation mode, which needs to complete the processes of bag loading, bag opening, filling, shape adjustment and pressing, vacuuming, and heat sealing in sequence.

[0003] The existing packaging sealing mechanism has the following problems: 1) Each process corresponds to an independent workstation. Although basic automation has been achieved, the dispersed layout of multiple workstations in continuous production results in a lengthy production process. The coordination of the actions of each workstation requires precise control, which not only increases the difficulty of equipment debugging, but also reduces the overall packaging efficiency due to the waiting time between processes.

[0004] 2) In the shaping and pressing stage, the material is squeezed by the front and rear extrusion plates to flatten the originally bulging material as much as possible. However, due to the lack of vertical constraints, the roasted nuts (such as peanuts or sunflower seeds) are prone to loosening due to uneven extrusion force, resulting in a large thickness gap between the upper and lower materials, which affects the regularity of the packaging shape and reduces the packaging quality.

[0005] 3) During the vacuuming stage, if the instantaneous negative pressure at the port of the vacuum tube is too large, it may attract light roasted food particles to the tube opening, causing local blockage. This will not only reduce the uniformity of the vacuum, but may also affect the vacuuming efficiency.

[0006] Therefore, there is an urgent need for a vacuum sealing mechanism for automatic packaging of roasted nuts and seeds to solve the above problems. Summary of the Invention

[0007] To address the aforementioned problems, this invention provides a vacuum sealing mechanism for automatic packaging of roasted nuts and seeds, which solves the problems mentioned in the background section.

[0008] To achieve the above objectives, this application provides the following technical solution: The present invention provides a vacuum sealing mechanism for automatic packaging of roasted nuts and seeds, comprising a base, a connecting plate rotatably mounted above the base, two sets of fixing components evenly distributed along their circumference on the connecting plate, a U-shaped fixing frame on the fixing components, a mouth-binding mechanism on the U-shaped fixing frame, a heat-sealing component on the mouth-binding mechanism, a shaping mechanism on the base, and a vertically movable vacuum tube above the shaping mechanism. The mouth-binding mechanism includes two sliding plates slidably mounted on the U-shaped fixing frame, a driving component one shared between the two corresponding sliding plates, hollow sealing plates slidably mounted on opposite sides of the two sliding plates, each sealing plate having an adsorption port on opposite sides, a mouth-binding plate below the sliding plates, and a connecting component between the mouth-binding plate and the corresponding sliding plate. The shaping mechanism includes a driving component two connected to the base, two shaping plates mounted on the driving component two, and a base support component shared between the two shaping plates. The sealing plate with the adsorption port adsorbs the film on the surface of the packaging bag. At the same time, it is driven by the drive component to control the opening and closing of the packaging bag opening. The corresponding two binding plates can control and adjust the degree of closure of the film on the front and back sides of the packaging bag. The two binding plates can also cooperate with the shaping plate and the bottom support plate to control the dispersion of the material inside the packaging bag and finally cooperate with the heat sealing component to perform the sealing operation.

[0009] According to an advantageous embodiment, a column is fixedly installed on the base, and a connecting plate is coaxially rotatably sleeved on the column via a rotating tube. A motor is fixedly installed on the base, and the output shaft of the motor is connected to the lower end of the rotating tube via a gear set.

[0010] According to an advantageous embodiment, the fixing assembly includes a Y-shaped fixing frame fixedly connected to the connecting plate. Both plates of the Y-shaped fixing frame are provided with fixing slots. An electromagnet is fixedly installed in the fixing slot. A sliding groove is provided on the side of the fixing slot opposite to the electromagnet. A return spring is fixedly installed in the sliding groove. One end of the return spring is fixedly connected to an iron fixing block. One side of the fixing block is slidably connected to the sliding groove.

[0011] According to an advantageous embodiment, the drive assembly includes a cylinder fixedly mounted on the upper side of the connecting plate. The telescopic end of the cylinder is fixedly connected to a corresponding slide plate. Gears are rotatably mounted on both supports of the U-shaped fixing frame. A toothed plate is fixedly mounted on the side of the slide plate closest to the corresponding gear, and the toothed plate meshes with the corresponding gear. A guide rod is fixedly mounted on the side of the two supports of the U-shaped fixing frame closest to each other via an ear seat. Both ends of the slide plate are slidably connected to the corresponding guide rod.

[0012] According to an advantageous embodiment, each of the two corresponding sliding plates has a second groove on its opposite side, and a second return spring is fixedly installed in the second groove. One end of the second return spring is fixedly connected to the corresponding sealing plate. The heat sealing assembly consists of a heat sealing plate and two L-shaped connecting plates. The two L-shaped connecting plates are fixedly installed on the upper side of the corresponding sliding plate, and both L-shaped connecting plates are fixedly connected to the heat sealing plate.

[0013] According to an advantageous embodiment, the connecting assembly includes a screw rod 1 threadedly connected to the slide plate, an adjusting seat rotatably connected to the lower end of the screw rod, two guide rods 2 fixedly disposed on the upper side of the adjusting seat, the guide rods 2 slidably inserted into the corresponding slide plate above, the adjusting seat being threadedly connected to the screw rod 2, one end of the screw rod 2 being rotatably connected to the constriction plate, and two guide rods 3 fixedly disposed on the constriction plate, the guide rods 3 slidably inserted into the corresponding adjusting seat.

[0014] According to an advantageous embodiment, the second drive assembly includes a mounting plate fixedly connected to the base. A guide rail is fixedly mounted on the mounting plate. A groove three is opened on the upper side of the guide rail. A screw three is rotatably mounted in the groove three. The screw three is provided with two threaded segments with opposite thread directions, and a slide block is threadedly connected to each threaded segment. The slide block is slidably connected to the guide rail. The slide block is fixedly connected to the corresponding shaping plate through a connecting post. A second motor is fixedly mounted on one side of the guide rail. The output shaft of the second motor is fixedly connected to one end of the screw three.

[0015] According to an advantageous embodiment, the base support assembly includes two sets of rotating frames disposed between two shaping plates and distributed left and right. A lifting plate is disposed between the two rotating frames. A height-adjustable base support plate is disposed on the lifting plate. The rotating frame is composed of two rotating plates that are rotatably connected to each other. One end of the rotating plate is rotatably connected to the corresponding shaping plate, and the other end of the rotating plate is rotatably connected to a slider. Four sliding grooves are provided on the lower side of the lifting plate. A guide rod is fixedly disposed in the sliding groove. The slider is slidably disposed in the corresponding sliding groove and slidably inserted into the corresponding guide rod.

[0016] According to an advantageous embodiment, a screw four is threaded in the middle of the lifting plate, the upper end of the screw four is rotatably connected to the lower side of the bottom support plate, and two guide rods five are fixedly provided on the lower side of the bottom support plate, with the lower ends of the guide rods five slidably inserted into the lifting plate.

[0017] According to an advantageous embodiment, a second cylinder is fixedly mounted on the top of the column via a bracket, and the telescopic end of the second cylinder is fixedly connected to a vacuum tube. Grooves adapted to the vacuum tube are provided in the middle of opposite sides of the two sealing plates, and both the vacuum tube and the interior of the sealing plates are connected to an external negative pressure device via air supply pipes.

[0018] Compared with the prior art, the vacuum sealing mechanism for automatic packaging of roasted nuts and seeds provided by the present invention has the following beneficial effects: 1. In the present invention, the bag filling, bag opening and filling can be completed in the same station by means of the fixing frame and the binding mechanism. At the same time, the shape adjustment pressing, vacuuming and heat sealing are completed in another process, which saves the material transfer waiting time between traditional multi-stations, reduces the difficulty of complex signal coordination and control between traditional multi-stations and the difficulty of equipment debugging, and improves the stability of the equipment and the packaging efficiency in high-speed production.

[0019] 2. In this invention, the front and rear shaping plates squeeze the material area inside the packaging bag, while the bottom support plate is driven to move upward by the rotating frame to support the bottom of the packaging bag. The drawstring plate at the top of the packaging bag restricts the material from moving too upward, forming a multi-directional three-dimensional shaping of the packaging bag as a whole, with bottom support, middle squeezing and upper limiting. This solves the problem of uneven pressure on roasted nuts and seeds, resulting in looseness and large thickness differences between the top and bottom, and improves the packaging quality after the packaging bag is sealed.

[0020] 3. In this invention, the front and rear drawstring plates of the packaging bag form a gap below the vacuum tube that allows only air to pass through while blocking the material. Together with the groove of the sealing plate, the inside of the packaging bag is sealed, so that the negative pressure during vacuuming only acts on the air between the materials. Air can enter the vacuum tube through the gap, while the roasted nut particles are blocked because their size is larger than the gap. This greatly reduces the problem of material adsorption and blockage of the tube opening, ensuring the uniformity of the vacuum degree and the efficiency of air extraction. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a schematic diagram of the exploded three-dimensional structure of the present invention.

[0023] Figure 3 This is a three-dimensional structural diagram of the slit mechanism in this invention.

[0024] Figure 4 This is a schematic diagram showing the relative positions of the skateboard, the drawstring plate, and the connecting components in this invention.

[0025] Figure 5 This is a side view of the cable tie mechanism and fixing components in this invention.

[0026] Figure 6 This is a three-dimensional structural diagram of the shaping mechanism in this invention.

[0027] Figure 7 This is a three-dimensional structural diagram of the base assembly in this invention.

[0028] Figure 8This is a side view of the packaging bag when it is initially secured by the fixing components.

[0029] Figure 9 This is a side view of the packaging bag after the opening is pulled open by the two sealing plates.

[0030] Figure 10 A side view diagram of the process of vacuuming and sealing the packaging bag after filling it with material.

[0031] Figure 11 This is a schematic diagram showing the relative positions of the sealing plate and heat-sealing plate to the sliding plate during vacuuming of a packaging bag.

[0032] Figure 12 A schematic diagram showing the position of the heat-sealing plate relative to the sliding plate when sealing a packaging bag.

[0033] Figure reference numerals: 1. Base; 2. Connecting plate; 3. Fixing assembly; 31. Y-shaped fixing bracket; 311. Fixing slot; 32. Electromagnet; 33. Fixing block; 4. U-shaped fixing bracket; 5. Closing mechanism; 51. Slide plate; 52. Drive assembly one; 521. Cylinder one; 522. Gear; 523. Gear plate; 53. Sealing plate; 531. Adsorption port; 532. Groove; 54. Closing plate; 55. Connecting assembly; 551. Screw 1. Adjusting seat; 552. Screw 2; 6. Heat sealing assembly; 61. Heat sealing plate; 62. L-shaped connecting plate; 7. Shaping mechanism; 71. Drive assembly 2; 711. Mounting plate; 712. Guide rail; 713. Screw 3; 714. Slide; 72. Shaping plate; 73. Base support assembly; 731. Rotating frame; 732. Lifting plate; 733. Base support plate; 734. Screw 4; 8. Vacuum tube; 9. Cylinder 2; 10. Packaging bag. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1 -Appendix Figure 12 This application will now be described in further detail.

[0035] Please refer to the following: Figures 1-3 A vacuum sealing mechanism for automatic packaging of roasted nuts and seeds includes a base 1, a column fixedly mounted on the base 1, a connecting plate 2 coaxially mounted on the base 1 via a rotating tube, a motor fixedly mounted on the base 1, and a gear transmission connection between the output shaft of the motor and the lower end of the rotating tube. The connecting plate 2 has two sets of fixing components 3 evenly distributed along its circumference, each with a U-shaped fixing frame 4, a sealing mechanism 5, and a heat-sealing component 6. A shaping mechanism 7 is mounted on the base 1. A cylinder 9 is fixedly mounted on the top of the column via a bracket, and a vacuum tube 8 is fixedly connected to the telescopic end of the cylinder 9. The vacuum tube 8 is connected to an external negative pressure device for vacuuming.

[0036] In actual operation, the fixing component 3 cooperates with the external bag feeding mechanism to control the packaging bag 10 (e.g., ...). Figure 8 As shown, the two sides are fixed, and then the bag opening of the packaging bag 10 is automatically opened by the binding mechanism 5 and filled by the corresponding external filling mechanism. After the filling is completed, the connecting plate 2 is rotated by the motor 1 and the gear 522 group to transfer the filled packaging bag 10 to the heat sealing component 6. Then, the vacuum tube 8 is inserted into the packaging bag 10 to a certain depth through the cylinder 2 9. The shaping mechanism 7 and the binding mechanism 5 limit and seal the packaging bag 10 and vacuum the packaging bag 10. After the vacuum tube 8 is pulled out from the inside of the packaging bag 10, the opening of the packaging bag 10 is quickly sealed by the heat sealing component 6.

[0037] See Figure 2 and Figure 5 The fixing component 3 includes a Y-shaped fixing frame 31 fixedly connected to the connecting plate 2. Each of the two support plates of the Y-shaped fixing frame 31 has a fixing slot 311. An electromagnet 32 ​​is fixedly installed in each fixing slot 311, and a sliding groove is provided on the side of the fixing slot 311 opposite to the electromagnet 32. A return spring (not shown in the figure) is fixedly installed in the sliding groove. One end of the return spring is fixedly connected to an iron fixing block 33, and one side of the fixing block 33 is slidably connected to the sliding groove. When the external bag feeding mechanism inserts a flat packaging bag 10 from top to bottom between the two fixing slots 311 (e.g., ...), ... Figure 8 As shown in the diagram, the electromagnet 32 ​​inside the fixing slot 311 is energized to attract the fixing block 33 inside the fixing slot 311, which moves towards the corresponding electromagnet 32. This fixes and clamps the edge of the packaging bag 10 inserted inside the fixing slot 311 between the corresponding electromagnet 32 ​​and the fixing block 33. It should be noted that the bag feeding mechanism can commonly be a feeding robot, which is well-known in the field and therefore not described in detail in this solution.

[0038] See Figures 2-4 The constriction mechanism 5 includes two sliding plates 51 slidably mounted on a U-shaped fixing frame 4. A drive assembly 52 is shared between the two corresponding sliding plates 51. Hollow sealing plates 53 are slidably mounted on opposite sides of the two sliding plates 51, and suction ports 531 are opened on opposite sides of the two corresponding sealing plates 53. A constriction plate 54 is provided below the sliding plates 51, and a connecting assembly 55 is provided between the constriction plate 54 and the corresponding sliding plate 51. A groove 532 adapted to the vacuum tube 8 is opened in the middle of the opposite sides of the two corresponding sealing plates 53. The interior of the sealing plate 53 is connected to an external negative pressure device through a gas supply pipe. The specific structure of the external negative pressure device is well known in the art, and therefore will not be described in detail in this solution.

[0039] In actual operation, the drive assembly 52 controls the two sliding plates 51 to move closer together, causing the two sealing plates 53 to move closer together and eventually adhere to the front and rear surfaces of the packaging bag 10. At this time, an external negative pressure device draws air to create negative pressure at the adsorption port 531 on the sealing plate 53, enabling the sealing plate 53 to adsorb the film of the packaging bag 10. After the two sealing plates 53 adhere to the surface of the packaging bag 10, the drive assembly 52 drives the two sealing plates 53 to move away synchronously, opening the bag opening of the packaging bag 10 (e.g., ...). Figure 9 As shown in the figure, the filling is carried out directly.

[0040] After filling, the filled packaging bag 10 is transferred to the sealing assembly for vacuuming. The vacuum tube 8 can be inserted into the opened packaging bag 10 to a certain depth. Then, the two corresponding sealing plates 53 move closer together, and the two grooves 532 on opposite sides of the two sealing plates 53 form a sealing area. The vacuum tube 8 is embedded in this sealing area, sealing the opening of the packaging bag 10 and sealing the vacuum tube 8 inserted into the packaging bag 10 at the same time. At the same time, as the sliding plate 51 moves the sealing plates 53, the drawstring plate 54 moves synchronously with the sliding plate 51 through the corresponding connecting assembly 55. When the two corresponding sealing plates 53 seal the opening of the packaging bag 10, the two corresponding drawstring plates 54 will also move closer together, pushing the front and rear films of the packaging bag 10 below the vacuum tube 8 port closer together. When the two sealing plates 53 move closer together, the two drawstring plates 54 control the front and rear films of the packaging bag 10 below the vacuum tube 8 port to gradually move closer and eventually form a gap (e.g., Figure 10 (As shown). This allows air from the material area inside the packaging bag 10 to enter the vacuum tube 8 through the gap for vacuuming, while preventing the material from being drawn into its interior by the negative pressure generated by the vacuum tube 8, thus avoiding any adverse effects.

[0041] See Figure 3 and Figure 4The drive assembly 52 includes a cylinder 521 fixedly mounted on the upper side of the connecting plate 2. The telescopic end of the cylinder 521 is fixedly connected to the corresponding slide plate 51. Gears 522 are rotatably mounted on both plates of the U-shaped fixing frame 4. A toothed plate 523 is fixedly mounted on the side of the slide plate 51 closest to the corresponding gear 522, and the toothed plate 523 meshes with the corresponding gear 522. Guide rods are fixedly mounted on the sides of the two plates of the U-shaped fixing frame 4 via lugs. The two ends of the slide plate 51 are slidably connected to the corresponding guide rods. The cylinder 521 pushes the slide plate 51 to move on the U-shaped fixing frame 4. The movement of the slide plate 51 is driven by the corresponding toothed plate 523 engaging with the gear 522, causing the other slide plate 51 on the opposite side to move towards each other, so that the two slide plates 51 can move their respective sealing plates 53 closer or further apart. During the movement, the guide rods guide the two corresponding slide plates 51 to slide on the U-shaped fixing frame 4.

[0042] See Figure 3 , Figure 4 , Figure 11 and Figure 12 Each of the two corresponding sliding plates 51 has a groove 2 on its opposite side, and a return spring 2 (not shown in the figure) is fixedly installed in the groove 2. One end of the return spring 2 is fixedly connected to the corresponding sealing plate 53. The heat sealing assembly 6 consists of a heat sealing plate 61 and two L-shaped connecting plates 62. The two L-shaped connecting plates 62 are fixedly installed on the upper side of the corresponding sliding plate 51, and both L-shaped connecting plates 62 are fixedly connected to the heat sealing plate 61. Initially, the heat sealing surface of the heat sealing plate 61 is further away from the packaging bag 10 than the corresponding sealing plate 53 below. When the two sealing plates 53 approach each other and finally abut against the front and rear sides of the film of the packaging bag 10, the sealing process before vacuuming can be performed. When the packaging bag 10 needs to be sealed after the vacuuming is completed, the vacuum tube 8 is pulled out from inside the packaging bag 10. At the same time, while the two corresponding sealing plates 53 are in contact with each other, the two corresponding sliding plates 51 continue to move closer to each other. The sliding plates 51 and the corresponding sealing plates 53 slide relative to each other, which causes the two corresponding sealing plates 53 to remain stationary and gradually retract into the grooves in their respective sliding plates 51. Finally, after the vacuum tube 8 is pulled out, the two sliding plates 51 move closer to each other by a certain distance, and the heat sealing plates 61 on the two sliding plates 51 will eventually come into contact with the surface of the packaging bag 10, thus heat sealing the packaging bag 10.

[0043] It should be noted that the heat-sealing technology of the heat-sealing plate 61 is the core component for achieving material sealing. It melts and bonds thermoplastic materials (such as plastic films, composite films, etc.) through heat transfer and pressure application, and forms a sealed structure after cooling. This is a well-known existing technology, and the specific structure is not described in detail in this solution.

[0044] See Figure 3 and Figure 4The connecting component 55 includes a screw 551 threadedly connected to the slide plate 51. An adjusting seat 552 is rotatably connected to the lower end of the screw 551. Two guide rods 2 are fixedly mounted on the upper side of the adjusting seat 552, and these guide rods 2 are slidably inserted into the corresponding slide plate 51 above. A screw 2 553 is threadedly connected to the adjusting seat 552, and one end of the screw 2 553 is rotatably connected to the constriction plate 54. Two guide rods 3 are fixedly mounted on the constriction plate 54, and these guide rods 3 are slidably inserted into the corresponding adjusting seat 552. Operators can control the adjusting seat 552 to move up and down by rotating the screw 551, adjusting the height of the constriction plate 54 relative to the shaping mechanism 7. Simultaneously, they can adjust the initial distance between the two corresponding constriction plates 54 by rotating the screw 2 553. Thus, when the two corresponding sealing plates 53 above abut, the two corresponding constriction plates 54 below can form an airflow gap of a suitable width as needed.

[0045] See Figure 2 , Figure 6 and Figure 7 The shaping mechanism 7 includes a second drive assembly 71, which includes a mounting plate 711 fixedly connected to the base 1. A guide rail 712 is fixedly mounted on the mounting plate 711. A third slide groove is provided on the upper side of the guide rail 712. A third screw 713 is rotatably mounted in the third slide groove. The third screw 713 has two threaded sections with opposite thread directions, and each threaded section is threadedly connected to a slide block 714. The slide block 714 is slidably connected to the guide rail 712. A shaping plate 72 is fixedly connected to the slide block 714 through a connecting column. A second motor is fixedly mounted on one side of the guide rail 712. The output shaft of the second motor is fixedly connected to one end of the third screw 713. A base support assembly 73 is provided between the two shaping plates 72. The second motor drives the third screw 713 to rotate, controlling the movement of the shaping plates 72 on the two slide blocks 714. The movement of the two shaping plates 72 allows them to move closer together, squeezing and shaping the front and rear sides of the packaging bag 10 filled with material sandwiched between them. Furthermore, when the two shaping plates 72 approach each other, the bottom support assembly 73 can simultaneously lift the bottom of the packaging bag 10, while the two corresponding drawstring plates 54 above can limit the material inside the packaging bag 10 and the material in the upper layer when the two shaping plates 72 squeeze the material inside the packaging bag 10, and shape the material inside the packaging bag 10.

[0046] See Figure 6 and Figure 7The base support assembly 73 includes two sets of rotating frames 731 arranged between two shaping plates 72 and distributed left and right. A lifting plate 732 is provided between the two rotating frames 731. A screw 734 is threaded in the middle of the lifting plate 732. The upper end of the screw 734 is rotatably connected to a base plate 733. Two symmetrical guide rods 5 are fixedly provided on the lower side of the base plate 733. The lower end of the guide rods 5 is slidably inserted into the lifting plate 732. The rotating frame 731 is composed of two rotating plates that are rotatably connected to each other. One end of the rotating plate is rotatably connected to the corresponding shaping plate 72, and the other end of the rotating plate is rotatably connected to a slider. Four sliding grooves 4 are opened on the lower side of the lifting plate 732. Guide rods 4 (not shown in the figure) are fixedly provided in the sliding grooves 4. The slider is slidably disposed in the corresponding sliding groove 4 and slidably inserted into the corresponding guide rod 4. The operator can control the screw 734 to rotate, thereby raising and lowering the bottom support plate 733 and adjusting its initial height to accommodate the actual bottom support needs of the packaging bag 10 during shaping. When the two corresponding shaping plates 72 approach each other, the two rotating plates in the rotating frame 731 rotate, thereby pushing the lifting plate 732 at its upper end to move the bottom support plate 733 upward to contact the bottom of the packaging bag 10, thus supporting the bottom of the packaging bag 10.

[0047] During the vacuuming process, the two shaping plates 72 move closer to each other and press the surface of the material-containing part of the packaging bag 10 back and forth. At the same time, the bottom support plate 733 moves upward under the drive of the rotating frame 731 to support the bottom of the packaging bag 10. Furthermore, the upper part is limited by the two front and rear binding plates 54 to restrict the material from moving too upward, which can better shape the material in the packaging bag 10.

[0048] The entire workflow of the automatic packaging and sealing mechanism is as follows: bag loading, bag opening, and filling: The unopened packaging bag 10 is placed on the Y-shaped fixing frame 31 by an external loading robot, and the packaging bag 10 is fixed by the corresponding fixing components 3, such as... Figure 8 As shown. Then, the drive component 52 controls the two corresponding sealing plates 53 to move closer together to adsorb the packaging bag 10, and then the two sealing plates 53 move away from each other to open the packaging bag 10 for filling, as shown. Figure 9 As shown.

[0049] The packaging bag 10 is shaped, vacuumed, and sealed: The connecting disc 2 rotates to control the movement of the filled packaging bag 10 between two shaping plates 72. Then, the upper vacuum tube 8 is inserted into the packaging bag 10 to a certain depth (the port of the vacuum tube 8 is located between the corresponding sealing plate 53 and the binding plate 54). While the vacuum tube 8 is vacuuming, the two shaping plates 72 move closer together to squeeze the material inside the packaging bag 10 to create a vacuum. This squeezing helps to expel air from between the materials and adjusts the shape of the packaged material in the packaging bag 10. Figure 10As shown. After vacuuming is completed, the vacuum tube 8 is pulled out of the packaging bag 10, and at the same time, the two heat-sealing plates 61 come close to each other and press against the sealing position of the packaging bag 10 to perform heat sealing. Then, it is transferred to the designated position for unloading.

[0050] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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.

[0051] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A vacuum sealing mechanism for automatic packaging of roasted snacks, comprising a base, a connecting disc is rotatably arranged above the base, characterized in that: The connecting disc is provided with two groups of fixing assemblies which are uniformly distributed along the circumferential direction of the connecting disc, the fixing assemblies are provided with U-shaped fixing frames, the U-shaped fixing frames are provided with binding mechanisms, the binding mechanisms are provided with heat sealing assemblies, the base is provided with a shaping mechanism, and the shaping mechanism is provided with a vacuum extraction pipe which can move up and down above the shaping mechanism; The binding mechanism comprises two sliding plates which are slidingly arranged on the U-shaped fixing frames, a driving assembly one is arranged between the two sliding plates, hollow sealing plates are slidingly arranged on opposite sides of the two sliding plates, suction ports are formed on opposite sides of the two sealing plates, a binding plate is arranged below the sliding plates, and a connecting assembly is arranged between the binding plate and the corresponding sliding plate; The shaping mechanism comprises a driving assembly two which is connected with the base, and two shaping plates are arranged on the driving assembly two and a bottom support assembly is arranged between the two shaping plates. The sealing plates with the suction ports are driven by the driving assembly one while adsorbing the surface film of the packaging bag, the opening and closing of the bag opening of the packaging bag are controlled, the two binding plates can control and adjust the folding degree of the front and rear film of the packaging bag, the two binding plates can cooperate with the shaping plates and the bottom support plates to control the dispersion form of the materials in the packaging bag, and finally cooperate with the heat sealing assembly to perform the sealing operation. The connecting assembly comprises a screw one which is threadedly connected with the sliding plate, a screw two which is threadedly connected with the adjusting seat and rotatably connected with one end of the binding plate, two guide rods three which are fixedly arranged on the binding plate and slidingly inserted into the corresponding adjusting seat. The fixing assembly comprises a Y-shaped fixing frame which is fixedly connected with the connecting disc, fixing grooves are formed in the two branches of the Y-shaped fixing frame, electric magnets are fixedly arranged in the fixing grooves, a sliding groove one is formed in the side of the fixing groove opposite to the electric magnet, a reset spring one is fixedly arranged in the sliding groove one, a fixed block made of iron is fixedly connected to one end of the reset spring one, and the fixed block is slidingly connected with the sliding groove one on one side. The driving assembly one comprises a cylinder one which is fixedly arranged on the upper side of the connecting disc, and the extension end of the cylinder one is fixedly connected with the corresponding sliding plate, gears are rotatably arranged on the two branches of the U-shaped fixing frame, and a tooth plate is fixedly arranged on the side of the sliding plate close to the corresponding gear.

2. The vacuum sealing mechanism for automatic packaging of roasted seeds and nuts according to claim 1, characterized in that, A column is fixedly arranged on the base, the connecting disc is coaxially and rotatably arranged on the column through a rotating pipe, a motor one is fixedly arranged on the base, and the output shaft of the motor one is drivingly connected with the lower end of the rotating pipe through a gear set.

3. The vacuum sealing mechanism for automatic packaging of roasted food according to claim 1, characterized in that, The two branches of the U-shaped fixing frame are both fixedly provided with a guide rod one through an ear seat on the side close to each other, and the two ends of the sliding plate are slidingly connected with the corresponding guide rod one.

4. The vacuum sealing mechanism for automatic packaging of roasted seeds and nuts according to claim 1, characterized in that, The two branches of the U-shaped fixing frame are both fixedly provided with a guide rod one through an ear seat on the side close to each other, and the two ends of the sliding plate are slidingly connected with the corresponding guide rod one. The heat sealing assembly is composed of a heat sealing plate and two L-shaped connecting plates, the two L-shaped connecting plates are fixedly arranged on the upper side of the corresponding sliding plate, and the two L-shaped connecting plates are both fixedly connected with the heat sealing plate.

5. The vacuum sealing mechanism for automatic packaging of roasted seeds and nuts according to claim 1, characterized in that, Two guide rods two are fixedly arranged on the upper side of the adjusting seat and slidingly inserted into the corresponding sliding plate above.

6. The vacuum sealing mechanism for automatic packaging of roasted seeds and nuts according to claim 1, characterized in that, The driving assembly two comprises a mounting plate fixedly connected with the base, a guide rail is fixedly arranged on the mounting plate, a sliding groove three is formed in the upper side of the guide rail, a screw three is rotationally arranged in the sliding groove three, two thread sections with opposite thread directions are arranged on the screw three, a sliding seat is threadedly connected on each thread section, the sliding seat is slidably connected with the guide rail, the sliding seat and the corresponding shaping plate are fixedly connected through a connecting column, and a motor two is fixedly arranged on one side of the guide rail.

7. The vacuum sealing mechanism for automatic packaging of roasted seeds and nuts according to claim 1, characterized in that, The bottom support assembly comprises two groups of rotating frames which are arranged between the two shaping plates and are distributed on the left and right sides, and a lifting plate is arranged between the two rotating frames. The lifting plate is provided with a height-adjustable bottom support plate. The rotating frame is composed of two rotating plates which are rotationally connected with each other. One end of the rotating plate is rotationally connected with the corresponding shaping plate. The other end of the rotating plate is rotationally connected with a sliding block. Four sliding grooves four are formed in the lower side of the lifting plate. A guide rod four is fixedly arranged in the sliding groove four. The sliding block is slidably arranged in the corresponding sliding groove four and is slidably inserted with the corresponding guide rod four.

8. The vacuum sealing mechanism for automatic packaging of roasted seeds and nuts according to claim 7, characterized in that, The middle part of the lifting plate is threadedly provided with a screw four. The upper end of the screw four is rotationally connected with the lower side of the bottom support plate. The lower side of the bottom support plate is fixedly provided with two guide rods five which are symmetrically arranged on the left and right sides. The lower end of the guide rod five is slidably inserted with the lifting plate.

9. The vacuum sealing mechanism for automatic packaging of roasted seeds and nuts according to claim 2, characterized in that, The top end of the stand is fixedly provided with a cylinder two through a support. The telescopic end of the cylinder two is fixedly connected with the vacuum pipe. Corresponding to the middle parts of the opposite sides of the two sealing plates, grooves are formed which are matched with the vacuum pipe. The vacuum pipe and the inside of the sealing plate are connected with the external negative pressure equipment through a gas conveying pipe.

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