A vacuum packaging device and method for cooked food products

Abstract

This application relates to the technical field of material packaging, and in particular to a vacuum-sealed packaging device and method for cooked products; it includes a conveyor frame for conveying packaging bags, a conveyor belt on the conveyor frame, a placement mechanism and an adjustment mechanism installed on the conveyor frame. In the packaging bag processing step, the supporting rod group drives the supporting rod through opposite displacement movement to achieve precise opening of the packaging bag mouth. When the actuating frame performs radial expansion, its separation movement can effectively break the unexpected adhesion caused by electrostatic adsorption effect on the inner wall of the packaging bag. After the cooked product filling process is completed, the limiting plate can limit the packaging bag to prevent the bottom accumulation phenomenon caused by the instantaneous settling of high-density cooked products, and at the same time avoid the surface wrinkling defects of the packaging bag caused by uneven distribution of cooked products during the vacuum sealing stage.

Description

Technical Field

[0001] This application relates to the technical field of material packaging, and in particular to a vacuum-sealed packaging device and method for cooked products. Background Technology

[0002] Maintaining food freshness is crucial in both home and business settings. While traditional methods like refrigeration and freezing can slow down spoilage, they are not always sufficient for foods requiring long-distance transport or those requiring extended storage, especially delicate or difficult-to-preserve cooked products.

[0003] Patent application CN111907746B discloses a high-efficiency double-bag horizontal vacuum packaging machine, employing a double-row matrix structure: each of the two horizontally arranged vacuum sealing chambers contains multiple vertical units. A three-stage transmission system—vertical transition mechanism → horizontal transfer mechanism → vertical distribution mechanism—achieves the spacing distribution of packaging bags between the horizontal rows and the sequential filling within the same vertical row. This dual-channel alternating operation mode doubles the processing efficiency of the vacuum sealing process. A matching discharge transmission mechanism completes automated material collection, forming a continuous and highly efficient horizontal packaging production line.

[0004] While the aforementioned existing vacuum packaging technologies can significantly increase vacuum sealing efficiency, they still have the following problems: the patent application did not perform a leveling process on the items to be packaged inside the bag, resulting in non-uniform deformation of the contents due to air pressure during vacuuming. This deformation is transmitted to the surface of the bag, forming irregular wrinkles and uneven textures. On the one hand, this causes instability in the geometric shape of the bag, leading to disordered stacking interfaces in standardized warehousing scenarios; on the other hand, the uneven surface of the items makes them prone to friction during transportation, causing wear and tear on the bag surface and even potential air leakage, affecting the quality of the items.

[0005] Therefore, the existing technologies for vacuum packaging still have room for improvement. Summary of the Invention

[0006] To solve the above-mentioned technical problems, this application provides a vacuum-sealed packaging device and method for cooked products, adopting the following technical solution:

[0007] In a first aspect, a vacuum-sealed packaging device for cooked products includes a conveyor frame for conveying packaging bags, a conveyor belt on the conveyor frame, and a placement mechanism and an adjustment mechanism installed on the conveyor frame.

[0008] The placement mechanism includes:

[0009] Placement blocks are provided in multiple quantities and evenly distributed along the length of the conveyor belt.

[0010] Support rods are provided in multiple sets, each corresponding to a placement block. Each set of support rods is symmetrically installed on the placement block along the length of the conveyor belt and opens and closes synchronously along the length of the conveyor belt.

[0011] A limiting plate is installed at the bottom of the support rod and is used to limit the position of the packaging bag.

[0012] The regulating mechanism includes:

[0013] The lifting frame is positioned above the conveyor belt and moves up and down along the height direction of the conveyor belt.

[0014] Two sets of actuating frames are symmetrically arranged along the width of the lifting frame, and multiple actuating frames are evenly arranged along the length of the lifting frame in each set, and they move synchronously along the width of the lifting frame.

[0015] The toggle lever is located between the two sets of toggle frames and there are multiple levers along the length of the lifting frame, and it moves back and forth along the length of the lifting frame.

[0016] Preferably, the conveyor frame includes two vertical frames, each with a conveyor roller mounted on it via bearings, and a conveyor belt installed between the two conveyor rollers. A horizontal frame is installed between the two vertical frames, and a vertical frame is mounted on the horizontal frame. An electric slider is mounted on the vertical frame, and a lifting frame is mounted on the electric slider.

[0017] Preferably, the bottom of the lifting frame is provided with a sliding plate corresponding to each set of actuating frames, and the actuating frame is installed at the bottom of the corresponding sliding plate. The bottom of the actuating frame is provided with actuating protrusion. Connecting blocks are symmetrically installed on the support rod along its length direction. The connecting blocks are provided with snap-fit ​​grooves. Telescopic connecting rods corresponding to the snap-fit ​​grooves are installed on the sliding plate.

[0018] Preferably, the limiting plate is slidably installed at the bottom of the support rod and automatically resets. A lifting frame is slidably installed through the vertical frame. A drive cylinder is installed on the lifting frame via a lifting cylinder. An adjusting frame is installed at the telescopic end of the drive cylinder. An adjusting plate for adjusting the spacing between the limiting plates is symmetrically installed on the side of the adjusting frame away from the drive cylinder along the width direction of the lifting frame.

[0019] Preferably, a bidirectional cylinder is mounted on the adjusting frame via a cylinder seat, and a clamping plate is mounted on the telescopic end of the bidirectional cylinder. A rectangular groove is opened on the opposite surface of the clamping plate, and a rotating roller that cooperates with the limiting plate is mounted inside the rectangular groove via a bearing.

[0020] Preferably, a reciprocating rod is installed on the top of the lever, and an automatic reset linkage rod is slidably installed through the vertical frame. The linkage rod is connected to the reciprocating rod, and a through groove is opened at the end of the linkage rod away from the reciprocating rod. A vertical connecting rod is installed on the lifting frame and passes through the through groove. Multiple adjusting protrusions are evenly arranged on the vertical connecting rod along its length.

[0021] Preferably, a tensioning block corresponding to the support rod and automatically reset is slidably provided at one end of the placement block near the limiting plate, and a rotating shaft is installed at one end of the support rod near the corresponding tensioning block, and the rotating shaft is installed on the corresponding tensioning block through a bearing.

[0022] Preferably, a tensioning frame is slidably arranged inside the placement block along its height direction, and an automatically resetting linkage cylinder is slidably arranged on the top of the placement block along its height direction. The linkage cylinder is connected to the corresponding tensioning frame, and a pressure rod that cooperates with the linkage cylinder is installed on the lifting frame.

[0023] Preferably, each of the two vertical frames is equipped with a support frame, and a limiting rod for limiting the position of the support rod is installed between the two support frames.

[0024] Secondly, a method for vacuum-sealing cooked food products to lock in freshness includes the following steps:

[0025] S1: Placement preparation: Place the packaging bag between the support rods corresponding to the placement block at the start of the conveying process, and make the opening of the packaging bag snap into the connecting block.

[0026] S2: Convey the bag opening mechanism, move the placement block with the packaged bag to the bottom of the lifting frame, and open the packaged bag by using the actuating frame.

[0027] S3: Bagging process: The cooked products to be packaged are put into the packaging bag through the bag opening, and the cooked products inside the packaging bag are homogenized.

[0028] S4: Vacuum treatment. Vacuum treatment is performed on the packaging bags containing cooked products, followed by heat sealing.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. In the packaging bag processing process, the supporting rod assembly drives the supporting rod through opposite displacement movement to achieve precise opening of the packaging bag opening. When the actuating frame performs radial expansion, its separation movement can effectively break the unexpected adhesion caused by electrostatic adsorption effect on the inner wall of the packaging bag. After the cooked product filling process is completed, the limiting plate can limit the packaging bag to prevent the bottom accumulation phenomenon caused by the instantaneous settling of high-density cooked products, and at the same time avoid the surface wrinkle defects of the packaging bag caused by uneven distribution of cooked products during the vacuum sealing stage.

[0031] 2. When the clamping plate of the present invention moves along the surface of the limiting plate, it can reciprocate and oscillate to induce simple harmonic motion of the limiting plate. In this way, the vibration of the limiting plate can destroy the static friction structure between the cooked product particles, realize the three-dimensional spatial recombination of the cooked product, eliminate local gaps, and avoid the risk of bag deformation caused by uneven material distribution during vacuum sealing. After the cooked product is filled, the clamping plate can move along the limiting plate and press the cooked product inside the packaging bag through the limiting plate, dynamically eliminate the discrete air cavities inside the packaging bag, reduce the gaps between the cooked products inside the packaging bag and form a dense material layer, and ensure the flatness of the packaging bag surface during subsequent vacuuming. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0033] Figure 2 This is a schematic diagram of the three-dimensional installation structure between the placement block, support rod, and limiting plate of the present invention.

[0034] Figure 3 This is a schematic diagram of the three-dimensional installation structure between the lifting frame, electric slider, and vertical frame of the present invention.

[0035] Figure 4 This is the present invention. Figure 3 Enlarged view of a portion of point A in the middle.

[0036] Figure 5 This is the present invention. Figure 3 Enlarged view of section B in the middle.

[0037] Figure 6 This is a schematic diagram of the three-dimensional installation structure between the placement block, the tensioning block, and the rotating shaft of the present invention.

[0038] Figure 7 This is a schematic diagram of the internal structure of the placement block of the present invention (viewed from the vertical frame towards the corresponding limiting plate).

[0039] Figure 8 This is a schematic diagram of the three-dimensional installation structure between the vertical frame, the lifting frame, and the drive cylinder of the present invention.

[0040] Figure 9 This is a three-dimensional installation structure diagram of the actuating rod, reciprocating rod, and linkage rod of the present invention.

[0041] Figure 10 This is the present invention. Figure 9 Enlarged view of a section at point C.

[0042] Figure 11 This is a flowchart of the vacuum-sealed freshness-locking packaging method for cooked products according to the present invention.

[0043] Explanation of reference numerals in the attached drawings: 1. Conveyor frame; 11. Vertical frame; 12. Conveyor roller; 13. Horizontal frame; 14. Vertical frame; 141. Lifting frame; 142. Drive cylinder; 143. Adjusting frame; 144. Adjusting plate; 145. Double-acting cylinder; 146. Clamping plate; 147. Rotating roller; 15. Electric slider; 2. Conveyor belt; 3. Placement mechanism; 31. Placement block; 311. Opening and closing block; 312. Rotating shaft 313. Tensioning frame; 314. Linkage cylinder; 315. Pressure rod; 32. Support rod; 321. Connecting block; 322. Snap-fit ​​groove; 323. Telescopic connecting rod; 33. Limiting plate; 4. Adjustment mechanism; 41. Lifting frame; 411. Sliding plate; 42. Actuating frame; 421. Actuating protrusion; 43. Actuating rod; 431. Reciprocating rod; 432. Linkage rod; 433. Vertical connecting rod; 434. Adjusting protrusion. Detailed Implementation

[0044] The following is in conjunction with the appendix Figures 1 to 11 This application will be described in further detail.

[0045] This application discloses a vacuum packaging device and method for cooked products. By combining stirring the cooked products inside the packaging bag with shaking the packaging bag, the cooked products inside the packaging bag are evenly and tightly distributed inside the packaging bag, avoiding wrinkles on the surface of the packaging bag during subsequent vacuuming.

[0046] Example 1:

[0047] Reference Figure 1 A vacuum-sealed packaging device for cooked products includes a conveyor frame 1 for conveying packaging bags, a conveyor belt 2 on the conveyor frame 1, a placement mechanism 3 and an adjustment mechanism 4 installed on the conveyor frame 1.

[0048] Reference Figure 2 The placement mechanism 3 includes:

[0049] Placement blocks 31 are provided in multiple quantities and are evenly distributed along the length of the conveyor belt 2.

[0050] Support rods 32 are provided in multiple sets and correspond one-to-one with placement blocks 31. Each set of support rods 32 is symmetrically installed on placement blocks 31 along the length of conveyor belt 2 and opens and closes synchronously along the length of conveyor belt 2.

[0051] The limiting plate 33 is set at the bottom of the supporting rod 32 and is used to limit the packaging bag.

[0052] Reference Figure 3 The regulating mechanism 4 includes:

[0053] The lifting frame 41 is positioned above the conveyor belt 2 and moves up and down along the height direction of the conveyor frame 1.

[0054] Two sets of actuating frames 42 are symmetrically arranged along the width direction of the lifting frame 41, and multiple actuating frames 42 are evenly arranged along the length direction of the lifting frame 41 in each set, and move synchronously along the width direction of the lifting frame 41.

[0055] A toggle lever 43 is provided between two sets of toggle frames 42 and multiple levers are provided along the length of the lifting frame 41. The toggle lever 43 is a telescopic structure.

[0056] In the packaging bag processing process, the support rod 32 is driven by the opposite displacement movement to achieve precise opening of the packaging bag mouth. When the agitator 42 performs radial expansion, its separation movement can effectively break the unexpected adhesion caused by the electrostatic adsorption effect on the inner wall of the packaging bag. After the cooked product filling process is completed, the limiting plate 33 can limit the packaging bag to prevent the bottom accumulation caused by the instantaneous settling of high-density cooked products, and at the same time avoid the surface wrinkle defects of the packaging bag caused by uneven distribution of cooked products during the vacuum sealing stage.

[0057] Reference Figure 1 as well as Figure 3 The conveyor frame 1 includes two vertical frames 11, each with a conveyor roller 12 mounted on it via bearings, and a conveyor belt 2 installed between the two conveyor rollers 12. A horizontal frame 13 is installed between the two vertical frames 11, and a vertical frame 14 is mounted on the horizontal frame 13. An electric slider 15 is mounted on the vertical frame 11, and a lifting frame 41 is mounted on the electric slider 15.

[0058] Reference Figures 3 to 5 The bottom of the lifting frame 41 is provided with a sliding plate 411 corresponding to each set of actuating frames 42, and the actuating frame 42 is installed at the bottom of the corresponding sliding plate 411. The bottom of the actuating frame 42 is provided with a towing protrusion 421. A connecting block 321 is symmetrically installed on the support rod 32 along its length direction. A snap-fit ​​groove 322 is opened on the connecting block 321. A telescopic connecting rod 323 corresponding to the snap-fit ​​groove 322 is installed on the sliding plate 411.

[0059] Among them, such as Figure 1The arrow direction indicated is the conveying direction of conveyor belt 2. In actual operation, before conveyor belt 2 starts working, the packaging bag is placed between the support rods 32 corresponding to the placement block 31 at the starting position of the conveyor. Then, the opening of the packaging bag is driven by the existing drive motor (which is existing technology and will not be described or shown in the figure) to drive the conveyor roller 12 to rotate. During the rotation of the conveyor roller 12, the conveyor belt 2 is moved. During the movement of the conveyor belt 2, the support rods 32 with the packaging bag are moved to the bottom of the lifting frame 41 through the placement block 31. At this time, the electric slider 15 is activated to drive the lifting frame 41 to move down. During the downward movement of the lifting frame 41, the sliding plate 411 drives the actuating frame 42 and the actuating protrusion 421 to insert into the packaging bag. The actuating protrusion 421 can increase the contact area between the bottom of the actuating frame 42 and the packaging bag, so that the packaging bag is opened more thoroughly, while avoiding the possibility of the bottom of the actuating frame 42 scratching the packaging bag.

[0060] At this time, the lever 43 enters the packaging bag simultaneously, and during the descent of the lifting frame 41, the telescopic connecting rod 323 also gets into the locking groove 322. The telescopic connecting rod 323 and the locking groove 322 cooperate with each other to lock the opening of the packaging bag onto the connecting block 321. The telescopic connecting rod 323 can be lengthened to avoid rigid collision with the supporting rod 32.

[0061] In addition, a support plate is installed on the vertical frame 14 to support the placement block 31 directly below the lifting frame 41, so as to prevent the support rod 32 from shaking when the cooked products are being loaded, which would cause the corresponding placement block 31 to shake on the conveyor belt 2.

[0062] Reference Figure 6 as well as Figure 7 The end of the placement block 31 near the limiting plate 33 is slidably provided with a tensioning block 311 corresponding to the support rod 32 and automatically reset. The end of the support rod 32 near the corresponding tensioning block 311 is equipped with a rotating shaft 312, and the rotating shaft 312 is mounted on the corresponding tensioning block 311 through a bearing.

[0063] The rotating shaft 312 allows the support rod 32 and the limiting plate 33 to rotate around the axis of the rotating shaft 312 when they enter the reversing area of ​​the conveyor belt 2 after being conveyed through the upper half of the conveyor belt 2. Instead of rotating in reverse synchronously with the reverse rotation of the lower half of the conveyor belt 2, the support rod 32 and the limiting rod 112 are prevented from flipping as the placement block 31 flips, which would cause the limiting plate 33 of the upper and lower halves of the conveyor belt 2 to collide. This provides clearance for the limiting plate 33.

[0064] The support frame 111 and the limiting rod 112 work together to limit the support rod 32, preventing the support rod 32 from rotating around the pivot 312 when filled with cooked products, thus affecting the stability of the packaging bag.

[0065] Reference Figure 3 as well as Figure 7 The placement block 31 has a tensioning frame 313 that slides along its height direction inside it. The top of the placement block 31 has an automatically resetting linkage cylinder 314 that slides along its height direction. The linkage cylinder 314 is connected to the corresponding tensioning frame 313. The lifting frame 41 is equipped with a pressure rod 315 that cooperates with the linkage cylinder 314.

[0066] The linkage cylinder 314 has a circular protrusion, and a return spring is fitted on the linkage cylinder 314. One end of the return spring is installed on the placement block 31, and the other end of the return spring is installed on the circular protrusion. The bottom of the opening and closing frame 313 is symmetrically provided with inclined slopes along the width direction of the lifting frame 41. The placement block 31 is provided with a telescopic spring for resetting the opening and closing block 311. In specific operation, the pressure rod 315 is driven to move down synchronously during the downward movement of the lifting frame 41. When the pressure rod 315 moves down, it contacts the circular protrusion and drives the linkage cylinder 314 to move down. During the downward movement of the linkage cylinder 314, the opening and closing frame 313 moves down. During the downward movement of the opening and closing frame 313, its inclined slope is attached to the opening and closing block 311 and drives the opening and closing block 311 to move away. During the movement of the opening and closing block 311, the support rod 32 is opened through the rotating shaft 312, thereby opening the packaging bag.

[0067] The return spring resets the linkage cylinder 314 when the pressure rod 315 disengages from the circular protrusion, and the telescopic spring rod resets the tension block 311 when the tension frame 313 moves upward.

[0068] During the opening process of the support rod 32, the sliding plate 411 is moved by the cooperation of the connecting block 321 and the telescopic connecting rod 323. During the movement of the sliding plate 411, the actuating frame 42 is moved simultaneously. During the movement of the actuating frame 42, the packaging bag can be further opened, avoiding the possibility that the part of the packaging bag located between the adjacent actuating frames 42 is still stuck and not fully opened.

[0069] After the packaging bag is opened, the cooked product is poured into the packaging bag from the bottom of the lifting frame 41 and between the two support rods 32.

[0070] Reference Figures 8 to 10 To ensure the uniformity and density of the cooked products inside the packaging bag, the clamp 146 provided by the present invention can tighten the cooked products inside the packaging bag through the limiting plate 33. Specifically, the limiting plate 33 is slidably installed at the bottom of the support rod 32 and automatically resets. A lifting frame 141 is slidably installed through the vertical frame 14. A drive cylinder 142 is installed on the lifting frame 141 through a lifting cylinder. An adjusting frame 143 is installed at the extension end of the drive cylinder 142. An adjusting plate 144 for adjusting the spacing of the limiting plates 33 is symmetrically installed on the side of the adjusting frame 143 away from the drive cylinder 142 along the width direction of the lifting frame 141.

[0071] A bidirectional cylinder 145 is mounted on the adjusting frame 143 via a cylinder seat. A clamping plate 146 is mounted on the telescopic end of the bidirectional cylinder 145. A rectangular groove is opened on the opposite surface of the clamping plate 146. A rotating roller 147 that cooperates with the limiting plate 33 is installed inside the rectangular groove via a bearing.

[0072] A reciprocating rod 431 is installed on the top of the lever 43. An automatic reset linkage rod 432 is slidably installed through the vertical frame 14 and is connected to the reciprocating rod 431. A through groove is opened at the end of the linkage rod 432 away from the reciprocating rod 431. A vertical connecting rod 433 is installed on the lifting frame 141 and passes through the through groove. Multiple adjusting protrusions 434 are evenly arranged along the length of the vertical connecting rod 433.

[0073] The adjusting plate 144 has a guide slope on its opposite side, and the supporting rod 32 is provided with an elastic telescopic rod (not shown in the figure) for resetting the limiting plate 33. The telescopic end of the actuating rod 43 is limited and slidably set on the lifting frame 41. That is, the telescopic section of the actuating rod 43 can move up and down under the drive of the lifting frame 41, and the telescopic end of the actuating rod 43 can also slide back and forth on the lifting frame 41 along its length direction. In specific operation, according to the thickness of the cooked product contained in the packaging bag, the driving cylinder 142 is started. During the movement of the telescopic end of the driving cylinder 142, the adjusting plate 144 is moved through the adjusting frame 143. During the movement of the adjusting plate 144, its guide slope contacts the limiting plate 33 and drives the limiting plate 33 to move towards each other by a specified distance, so that the distance between the limiting plates 33 is the same as the thickness of the cooked product contained in the packaging bag.

[0074] Furthermore, the two limiting plates 33 work together to limit the packaging bag and prevent the bottom accumulation caused by the instantaneous settling of high-density cooked products, thus playing a role in the uniform distribution of cooked products.

[0075] When the guide slope on the adjusting plate 144 contacts the limiting plate 33, the clamping plate 146 moves synchronously to both sides of the limiting plate 33. It should be noted that the tangent of the rotating roller 147 near the limiting plate 33 and the critical line of the guide slope contacting the limiting plate 33 are on the same vertical plane, thus ensuring that the rotating roller 147 is synchronously attached to the limiting plate 33 when the adjusting plate 144 contacts the limiting plate 33.

[0076] After the adjustment plate 144 and clamping plate 146 are adjusted, when the cooked products are poured into the packaging bag, the external driving force drives the lifting frame 141 to move back and forth along the length of the vertical frame 14. During the movement of the lifting frame 141, the bidirectional cylinder 145 is activated. The extension end of the bidirectional cylinder 145 drives the clamping plate 146 to swing back and forth along its movement direction. During the swinging back and forth of the clamping plate 146, the rotating roller 147 is driven to strike the limiting plate 33. As a result, the limiting plate 33 resonates and causes the cooked products inside the packaging bag to vibrate synchronously. During the vibration of the limiting plate 33, the static friction structure between the cooked product particles can be destroyed, realizing the three-dimensional spatial recombination of the cooked products. At the same time, it eliminates local gaps and avoids the risk of bag deformation caused by uneven material distribution during vacuum sealing.

[0077] It should be noted that when the lifting frame 41 moves the actuating frame 42 downward, it simultaneously moves the actuating rod 43 downward and into the packaging bag. The adjusting protrusion 434 has a continuous toothed structure. During the reciprocating movement of the lifting frame 141, the vertical connecting rod 433 moves up and down. A return spring rod is installed on the vertical frame 14 for resetting the linkage rod 432. During the reciprocating movement of the vertical connecting rod 433, the linkage rod 432 can be moved closer to the vertical connecting rod 433 by adjusting the inclined surface on the upper side of the protrusion 434. Whenever the linkage rod 432 passes the inclined surface on the lower side of the adjusting protrusion 434, the return spring rod resets the linkage rod 432, causing it to move away from the vertical connecting rod 433. Repeating the above actions and cooperating with the return spring rod can drive the linkage rod 432 to move back and forth along its length.

[0078] During the reciprocating movement of the linkage rod 432, the reciprocating rod 431 synchronously drives the agitator rod 43 to reciprocate. During the reciprocating movement of the agitator rod 43, the cooked products inside the packaging bag can be stirred, making the cooked products more compact and avoiding wrinkles caused by the cooked products being too loose during vacuuming, which would affect the flatness of the surface of the cooked product packaging bag.

[0079] After the cooked product is filled, the lever 43 and the lever frame 42 are reset, and finally the opening of the packaging bag is heat-sealed to obtain the vacuum-packaged cooked product.

[0080] Example 2: Refer to Figure 8 Based on Example 1, when the package bag is full of cooked products, the electric slider 15 and the lifting frame 41 work together to drive the actuating frame 42 and the actuating rod 43 to be removed from the package bag. At this time, due to the obstruction of the cooked products, the limiting plate 33 will not move towards each other through the supporting rod 32. At this time, the lifting frame 141 moves to the bottom of the limiting plate 33 and restarts the bidirectional cylinder 145 so that its extension end drives the rotating roller 147 to tightly abut against the limiting plate 33 through the clamping plate 146. That is, at this time, the bidirectional cylinder 145 no longer drives the clamping plate 146 to repeatedly strike the limiting plate 33.

[0081] Then, the lifting frame 141 is moved upward by external force. During the upward movement of the lifting frame 141, the clamping plate 146 is moved upward. Then the clamping plate 146 can move along the limiting plate 33 and cooperate with the rotating roller 147 to press the cooked products inside the packaging bag, dynamically eliminate the discrete air cavities inside the packaging bag, reduce the gaps between the cooked products inside the packaging bag and form a dense material layer, and ensure the flatness of the packaging bag surface during subsequent vacuuming.

[0082] Finally, refer to Figure 11 The present invention also provides a method for vacuum-sealing cooked products to preserve freshness, comprising the following steps:

[0083] S1: Placement preparation: Place the packaging bag between the support rods 32 corresponding to the placement block 31 at the start of the conveying process, and make the opening of the packaging bag snap into the connecting block 321.

[0084] S2: The bag is opened by conveying the bag opening, and then the existing drive motor drives the conveyor roller 12 to rotate. During the rotation of the conveyor roller 12, the conveyor belt 2 moves. During the movement of the conveyor belt 2, the support rod 32 with the packaging bag moves to the bottom of the lifting frame 41 through the placement block 31.

[0085] S3: Bagging process. Based on the thickness of the cooked product contained in the packaging bag, the drive cylinder 142 is started. During the movement of the extension end of the drive cylinder 142, the adjustment plate 144 is moved by the adjustment frame 143. During the movement of the adjustment plate 144, its guide slope contacts the limit plate 33 and drives the limit plate 33 to move a specified distance towards each other. When the adjustment plate 144 and the clamping plate 146 are adjusted.

[0086] When pouring cooked products into the packaging bag, the external driving force drives the lifting frame 141 to move back and forth along the length of the vertical frame 14. During the movement of the lifting frame 141, the bidirectional cylinder 145 is activated. The extension end of the bidirectional cylinder 145 drives the clamping plate 146 to swing back and forth along its direction of movement. During the swinging back and forth of the clamping plate 146, the rotating roller 147 is driven to strike the limiting plate 33, which in turn causes the limiting plate 33 to resonate and cause the cooked products inside the packaging bag to vibrate synchronously. During the reciprocating movement of the linkage rod 432, the reciprocating rod 431 synchronously drives the agitator rod 43 to move back and forth. During the reciprocating movement of the agitator rod 43, the cooked products inside the packaging bag can be stirred.

[0087] S4: Vacuum treatment. Vacuum treatment is performed on the packaging bags containing cooked products, followed by heat sealing.

[0088] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0089] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vacuum-sealed packaging device for cooked products, comprising a conveyor frame (1) for conveying packaging bags, wherein a conveyor belt (2) is provided on the conveyor frame (1), characterized in that: The conveyor frame (1) is equipped with a placement mechanism (3) and an adjustment mechanism (4). The placement mechanism (3) includes: a placement block (31), which is provided in multiple quantities and evenly distributed along the length of the conveyor belt (2); Support rods (32) are provided in multiple sets and correspond one-to-one with the placement blocks (31). Each set of support rods (32) is symmetrically installed on the placement blocks (31) along the length direction of the conveyor belt (2) and opens and closes synchronously along the length direction of the conveyor belt (2). A limiting plate (33) is set at the bottom of the supporting rod (32) and is used to limit the packaging bag; The regulating mechanism (4) includes: The lifting frame (41) is set above the conveyor belt (2) and moves up and down along the height direction of the conveyor frame (1); Two sets of actuating frames (42) are symmetrically arranged along the width direction of the lifting frame (41), and multiple actuating frames (42) are evenly arranged along the length direction of the lifting frame (41) in each set, and move synchronously along the width direction of the lifting frame (41). A lever (43) is provided between two sets of lever frames (42) and multiple levers are provided along the length of the lifting frame (41), and it moves back and forth along the length of the lifting frame (41); The conveyor frame (1) includes two vertical frames (11), each of which is equipped with a conveyor roller (12) via bearings, and a conveyor belt (2) is installed between the two conveyor rollers (12). A horizontal frame (13) is installed between the two vertical frames (11), and a vertical frame (14) is installed on the horizontal frame (13). An electric slider (15) is installed on the vertical frame (11), and a lifting frame (41) is installed on the electric slider (15). The bottom of the lifting frame (41) is provided with a sliding plate (411) corresponding to each set of actuating frames (42), and the actuating frame (42) is installed at the bottom of the corresponding sliding plate (411). The bottom of the actuating frame (42) is provided with a towing protrusion (421). A connecting block (321) is symmetrically installed on the support rod (32) along its length direction. A snap-fit ​​groove (322) is opened on the connecting block (321). A telescopic connecting rod (323) corresponding to the snap-fit ​​groove (322) is installed on the sliding plate (411). The limiting plate (33) is slidably installed at the bottom of the support rod (32) and automatically resets. A lifting frame (141) is slidably installed through the vertical frame (14). A drive cylinder (142) is installed on the lifting frame (141) via a lifting cylinder. An adjusting frame (143) is installed at the extension end of the drive cylinder (142). An adjusting plate (144) for adjusting the spacing of the limiting plate (33) is symmetrically installed on the side of the adjusting frame (143) away from the drive cylinder (142) along the width direction of the lifting frame (141). A bidirectional cylinder (145) is mounted on the adjusting frame (143) via a cylinder seat. A clamping plate (146) is mounted on the telescopic end of the bidirectional cylinder (145). A rectangular groove is provided on the opposite surface of the clamping plate (146). A rotating roller (147) that cooperates with the limiting plate (33) is installed inside the rectangular groove via a bearing.

2. The vacuum preservation packaging device for cooked products according to claim 1, characterized in that: A reciprocating rod (431) is installed on the top of the lever (43). An automatic reset linkage rod (432) is slidably installed on the vertical frame (14). The linkage rod (432) is connected to the reciprocating rod (431). A through groove is opened at the end of the linkage rod (432) away from the reciprocating rod (431). A vertical connecting rod (433) is installed on the lifting frame (141). The vertical connecting rod (433) passes through the through groove. Multiple adjusting protrusions (434) are evenly arranged on the vertical connecting rod (433) along its length direction.

3. The vacuum-sealed packaging device for cooked products according to claim 1, characterized in that: The end of the placement block (31) near the limit plate (33) is slidably provided with a tensioning block (311) corresponding to the support rod (32) and automatically reset. The end of the support rod (32) near the corresponding tensioning block (311) is equipped with a rotating shaft (312), and the rotating shaft (312) is mounted on the corresponding tensioning block (311) through a bearing.

4. The vacuum preservation packaging device for cooked products according to claim 1, characterized in that: An opening and closing frame (313) is slidably installed inside the placement block (31) along its height direction. An automatically resetting linkage cylinder (314) is slidably installed on the top of the placement block (31) along its height direction. The linkage cylinder (314) is connected to the corresponding opening and closing frame (313). A pressure rod (315) that cooperates with the linkage cylinder (314) is installed on the lifting frame (41).

5. A vacuum-sealed packaging device for cooked products according to claim 3, characterized in that: Support frames (111) are installed on both vertical frames (11), and a limiting rod (112) for limiting the support rod (32) is installed between the two support frames (111).

6. A method for vacuum-sealing cooked food packaging, comprising a vacuum-sealing packaging device for cooked food as described in any one of claims 1-5, characterized in that, Its usage includes the following steps: S1: Placement preparation, place the packaging bag between the support rods (32) corresponding to the placement block (31) at the start of the conveying, and make the opening of the packaging bag snap into the connecting block (321); S2: Convey the bag opening, move the placement block (31) with the packaging bag to the bottom of the lifting frame (41), and open the packaging bag by means of the toggle frame (42); S3: Bagging process, the cooked products to be packaged are put into the packaging bag through the bag opening, and the cooked products inside the packaging bag are homogenized. S4: Vacuum treatment. Vacuum treatment is performed on the packaging bags containing cooked products, followed by heat sealing.

Images