Vegetable packaging machine and packaging method thereof

Abstract

The invention relates to a vegetable packaging machine and a packaging method thereof. The second sealing, heating and cutting component is designed to adopt a Y-direction movable driving member to drive a connecting seat roller to move in a horizontal direction. The second sealing heating block and the second cutting knife on the surface of the roller are respectively matched with the linear first sealing heating block and the first cutting knife in a rolling manner to efficiently seal the two ends and cut the middle of the packaging film being transported. The sealing, heating and cutting mechanism of the present application can ensure that the packaging film is completely sealed and cut in all directions. Due to the rolling matching method, even if the surface of the sealing heating block is slightly deformed due to long-term use of the mechanism, the fit of the deformed part can be ensured, and the bag openings of some packaging bags will not be completely sealed, and the bag needs to be unpacked and repacked.

Description

Technical Field

[0001] The invention relates to the technical field of vegetable packaging, and in particular to a vegetable packaging machine and a packaging method thereof. Background Art

[0002] In the working principle of the vegetable packaging machine in the prior art, a conveyor belt is usually set up, and the vegetables to be packaged are placed on the conveyor belt at equal intervals. As the conveyor belt moves forward, after being wrapped by the packaging film, the packaging film mouth relative to the conveying direction of the conveyor belt needs to be hot-melt sealed and cut off by a heated die head.

[0003] A Chinese patent with authorization announcement number CN105383727B discloses a fully automatic vegetable packaging machine. Referring to the sealing mechanism in the patent scheme, the upper and lower heads are both linear, and the upper and lower heads are distributed in a horizontal direction perpendicular to the conveying direction of the conveyor belt. The upper and lower heads are controlled to move toward each other and fit together, so that the packaging film mouth between the upper and lower heads is hot-melt sealed. In the scheme, the structure of the cutter is similar. Although this structure is relatively efficient, it has extremely high requirements on the flatness of the contact surface of the upper and lower heads. As the use time increases, the contact surface of the upper and lower heads will have a tiny gap due to slight deformation, so that the packaging film mouth cannot be completely sealed when the packaging film passes through. The bag mouth of some packaging bags will leave a small opening relative to the position of the upper and lower heads, resulting in the bag mouth cannot be completely sealed, and the bag needs to be unpacked and repackaged.

[0004] Therefore, how to prevent the upper and lower straight ironing heads in the prior art from deforming after long-term use so that the opening of the packaging bag cannot be completely sealed has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The technical problem to be solved by the present invention is: how to prevent the upper and lower straight iron heads in the prior art from being deformed after long-term use so that the opening of the packaging bag cannot be completely sealed.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A vegetable packaging machine, comprising:

[0008] frame;

[0009] A first conveyor belt, wherein the first conveyor belt is connected to the frame, and the conveying direction of the first conveyor belt is an X direction;

[0010] A second conveyor belt, wherein the second conveyor belt is connected to the frame, the starting end of the second conveyor belt is located at the end of the first conveyor belt, and the conveying direction of the second conveyor belt is an X direction;

[0011] A third conveyor belt, the third conveyor belt is connected to the frame, the starting end of the third conveyor belt is located at the end of the second conveyor belt, and the conveying direction of the third conveyor belt is X direction;

[0012] A film folding mechanism, the film folding mechanism is located on both sides of the starting end of the second conveyor belt, and the film folding mechanism is used to bend and guide both sides of the packaging film in the Z direction respectively;

[0013] A center sealing mechanism, the center sealing mechanism is located above the second conveyor belt, the center sealing mechanism is located in front of the film folding mechanism relative to the conveying direction of the second conveyor belt, and the center sealing mechanism is used to hot-melt seal and connect the two sides of the packaging film;

[0014] A sealing heating and cutting mechanism, the sealing heating and cutting mechanism is located between the second conveyor belt and the third conveyor belt, the sealing heating and cutting mechanism comprises a first sealing heating and cutting component and a second sealing heating and cutting component; the first sealing and cutting component comprises a first sealing heating and cutting component body and a vertical moving driving component, the vertical moving driving component is used to drive the first sealing heating and cutting component body to move in a vertical direction;

[0015] The first sealing heating and cutting member comprises a first cutter arranged along a straight line in the Y direction, and first sealing heating blocks arranged along a straight line in the Y direction are respectively arranged on both sides of the first cutter in the X direction;

[0016] The sealing heating and cutting mechanism comprises a second sealing heating and cutting assembly and a Y-direction movable driving member; the second sealing heating and cutting assembly comprises a movable connecting seat and a roller, the roller is rotatably connected to the movable connecting seat, the movable connecting seat is connected to the Y-direction movable driving member, the Y-direction movable driving member is used to drive the movable connecting seat to move along the Y direction, and the second sealing heating and cutting assembly is located above the first sealing heating and cutting assembly;

[0017] The axial direction of the roller is the X direction, and a circular second cutter is provided in the middle of the circumferential surface of the roller. Circular second sealing heating blocks are respectively provided on both sides of the X direction of the second cutter. The second sealing heating block is located in the same vertical plane as one of the first sealing heating blocks.

[0018] Furthermore, in the above-mentioned vegetable packaging machine structure, the center sealing mechanism is provided with an arc-shaped guide block at the rear relative to the conveying direction, and the arc-shaped guide block is used to guide both side edges of the packaging film toward the middle to the center sealing mechanism.

[0019] Furthermore, in the above-mentioned vegetable packaging machine structure, the central sealing mechanism includes two symmetrically distributed heating conveyor belts, and the belt surfaces on opposite sides of the two heating conveyor belts are in contact with each other.

[0020] Furthermore, in the above-mentioned vegetable packaging machine structure, the vertical moving driving component includes a cylinder or a hydraulic cylinder.

[0021] Furthermore, in the above-mentioned vegetable packaging machine structure, the Y-axis moving drive component is a screw guide rail module.

[0022] Furthermore, in the above-mentioned vegetable packaging machine structure, the circumference of the roller is smaller than the length of the first sealing heating block.

[0023] Furthermore, in the above-mentioned vegetable packaging machine structure, the length of the screw guide rail module is longer than the length of the first sealing heating block.

[0024] Furthermore, in the above-mentioned vegetable packaging machine structure, the film folding mechanism includes two triangular guide plates symmetrically distributed on both sides of the starting end of the second conveyor belt.

[0025] Further, the packaging method of the above vegetable packaging machine comprises the following steps:

[0026] Step 1: The vegetables to be packaged are placed on the first conveyor belt at a certain interval by manual or mechanical means, and the vegetables are passed through the second conveyor belt and the third conveyor belt in turn;

[0027] Step 2: When the vegetables pass through the starting end of the second conveyor belt, the packaging film is guided from the starting end of the conveyor belt to the second conveyor belt under the action of the film folding device, and the film folding device bends both sides of the packaging film in the Y direction, gathers them together, and guides them to the middle sealing mechanism;

[0028] Step 3: The two sides of the packaging film are connected to each other by heat-melting sealing through a central sealing mechanism, so that the vegetables are wrapped in the cylindrical packaging film;

[0029] Step 4: The vegetables continue to be transported in the X direction. When the packaging film between two adjacent vegetables moves to the sealing, heating and cutting mechanism, the Y-direction driving member is controlled to drive the connecting seat to move a short distance along the Y direction, so that the roller is located above one end of the first sealing, heating and cutting component;

[0030] Control the vertical moving drive member to drive the first sealing, heating and cutting assembly to move upward to a position higher than the upper surface of the second conveyor belt, so that one end of the first sealing, heating and cutting assembly contacts the roller surface, so that one end of the first sealing heating block is in contact with the lower end of the second sealing heating block, and one end of the first cutter is in contact with the lower end of the second cutter;

[0031] Control the Y-direction moving driving member to continue to drive the connecting seat to move along the Y-direction, so that the roller rolls on the upper surface of the first sealing heating and cutting component to the other end, so that the packaging film is cut, and hot-melt sealing is performed on both sides of the cut portion of the packaging film;

[0032] Control the vertical moving drive member to drive the first sealing, heating and cutting assembly to move downward to a position lower than the upper surface of the second conveyor belt, and control the Y-direction moving drive member to drive the connecting seat to move a short distance in the Y direction, so that the roller moves to the upper side of the first sealing, heating and cutting assembly in the Y direction;

[0033] Step 5: Control the second conveyor belt and the third conveyor belt to continue to transport the vegetables in the X direction. When the next packaging film located between two adjacent vegetables moves to the sealing, heating and cutting mechanism, repeat the above step 4.

[0034] The beneficial effects of the present invention are as follows: in the vegetable packaging machine structure involved in the present invention, automatic assembly line operation of vegetable packaging is realized, and the packaging efficiency is high. By designing a sealing, heating and cutting mechanism with a unique structure, by designing a second sealing, heating and cutting component that adopts a Y-direction moving driving member to drive the connecting seat roller to move in a horizontal direction, the second sealing heating block and the second cutting knife on the surface of the roller are respectively used in a rolling cooperation with the linear first sealing heating block and the first cutting knife to efficiently seal the two ends and cut the middle of the packaging film being transported. Compared with the traditional upper and lower sealing, heating and cutting components that both adopt a linear structure, the upper and lower sealing, heating and cutting components are used to fit each other to achieve sealing and cutting. The sealing, heating and cutting mechanism of the present application can ensure that the packaging film is completely sealed and cut in all directions. Due to the rolling cooperation method, even if the surface of the sealing heating block is slightly deformed due to long-term use of the mechanism, the fit of the deformed part can be guaranteed, and the bag openings of some packaging bags will not be completely sealed, and the bag needs to be unpacked and repacked. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of a vegetable packaging machine according to a specific embodiment of the present invention;

[0036] Figure 2 for Figure 1 A magnified view of part A;

[0037] Description of labels:

[0038] 1. Frame;

[0039] 2. The first conveyor belt;

[0040] 3. Second conveyor belt;

[0041] 4. The third conveyor belt;

[0042] 5. Film folding mechanism;

[0043] 6. Middle sealing mechanism; 61. Heating conveyor belt;

[0044] 7. Sealing heating and cutting mechanism; 71. First sealing heating and cutting component; 711. First cutter; 712. First sealing heating block; 72. Vertical moving drive member; 73. Second sealing heating and cutting component; 731. Connecting seat; 732. Roller; 733. Second cutter; 734. Second sealing heating block; 74. Y-axis moving drive member; 741. Screw guide rail module. DETAILED DESCRIPTION

[0045] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0046] Please refer to Figure 1 to Figure 2 The specific embodiment of the present invention relates to a vegetable packaging machine, comprising:

[0047] Rack 1;

[0048] A first conveyor belt 2, wherein the first conveyor belt 2 is connected to the frame 1, and the conveying direction of the first conveyor belt 2 is an X direction;

[0049] A second conveyor belt 3, wherein the second conveyor belt 3 is connected to the frame 1, the starting end of the second conveyor belt 3 is located at the end of the first conveyor belt 2, and the conveying direction of the second conveyor belt 3 is the X direction;

[0050] A third conveyor belt 4, wherein the third conveyor belt 4 is connected to the frame 1, the starting end of the third conveyor belt 4 is located at the end of the second conveyor belt 3, and the conveying direction of the third conveyor belt 4 is the X direction;

[0051] A film folding mechanism 5, the film folding mechanism 5 is located on both sides of the starting end of the second conveyor belt 3, and the film folding mechanism 5 is used to bend and guide both sides of the packaging film in the Z direction respectively;

[0052] A middle sealing mechanism 6, the middle sealing mechanism 6 is located above the second conveyor belt 3, the middle sealing mechanism 6 is located in front of the film folding mechanism 5 relative to the conveying direction of the second conveyor belt 3, and the middle sealing mechanism 6 is used to hot-melt seal the two sides of the packaging film;

[0053] The sealing heating and cutting mechanism 7 is located between the second conveyor belt 3 and the third conveyor belt 4, and comprises a first sealing heating and cutting component 71 and a second sealing heating and cutting component 73; the first sealing and cutting component comprises a first sealing heating and cutting component body and a vertical moving driving component 72, and the vertical moving driving component 72 is used to drive the first sealing heating and cutting component body to move in a vertical direction;

[0054] The first sealing heating and cutting member comprises a first cutter 711 arranged along a straight line in the Y direction, and first sealing heating blocks 712 arranged along a straight line in the Y direction are respectively arranged on both sides of the first cutter 711 in the X direction;

[0055] The sealing heating and cutting mechanism 7 includes a second sealing heating and cutting component 73 and a Y-direction moving driving member 74; the second sealing heating and cutting component 73 includes a movable connecting seat 731 and a roller 732, the roller 732 is rotatably connected to the movable connecting seat 731, the movable connecting seat 731 is connected to the Y-direction moving driving member 74, the Y-direction moving driving member 74 is used to drive the movable connecting seat 731 to move along the Y direction, and the second sealing heating and cutting component 73 is located above the first sealing heating and cutting component 71;

[0056] The axial direction of the roller 732 is the X direction, and a circular second cutter 733 is provided in the middle of the circumferential surface of the roller 732. Circular second sealing heating blocks 734 are respectively provided on both sides of the X direction of the second cutter 733. The second sealing heating block 734 is respectively located in the same vertical plane with one of the first sealing heating blocks 712.

[0057] In the above structure, the second sealing, heating and cutting component 73 is designed to adopt the Y-direction moving driving member 74 to drive the connecting seat 731 roller 732 to move in the horizontal direction, and the second sealing heating block 734 and the second cutting knife 733 on the surface of the roller 732 are respectively used to roll with the linear first sealing heating block 712 and the first cutting knife 711 to efficiently seal the two ends and cut the middle of the conveying packaging film. Compared with the traditional upper and lower sealing, heating and cutting components both adopt a linear structure, and the upper and lower sealing, heating and cutting components are used to fit each other to achieve sealing and cutting, the sealing, heating and cutting mechanism 7 of the present application can ensure that the packaging film is completely sealed and cut in all directions. Due to the rolling cooperation method, even if the surface of the sealing heating block is slightly deformed due to long-term use of the mechanism, the fit of the deformed part can be guaranteed, and the bag openings of some packaging bags will not be completely sealed, and the bag needs to be unpacked and repacked.

[0058] In an optional embodiment, the center sealing mechanism 6 is provided with an arc-shaped guide block at the rear relative to the conveying direction, and the arc-shaped guide block is used to guide both side edges of the packaging film toward the middle to the center sealing mechanism 6.

[0059] In the above structure, the arc-shaped axial direction of the arc-shaped guide block is the X direction, and the arc-shaped guide block is a cone that is tightened at the front, which is convenient for guiding the two sides of the packaging film to gather toward the middle, so that it is easier to pass through the middle sealing mechanism 6.

[0060] In an optional embodiment, the center sealing mechanism 6 includes two symmetrically distributed heating conveyor belts 61, and the belt surfaces on opposite sides of the two heating conveyor belts 61 are in contact with each other.

[0061] During the conveying process, two heating conveyor belts 61 are used to heat-melt seal the two sides of the gathered and guided packaging film and convey it in the X direction, so that the packaging film is formed into a cylindrical shape, and the vegetables are wrapped in the cylindrical packaging film.

[0062] In an optional embodiment, the vertical movement driving member 72 includes a cylinder or a hydraulic cylinder.

[0063] In the above structure, in order to improve the stability of the vertical moving drive member 72, additional vertical guide rails or limit shafts can be added, or the number of hydraulic cylinders or air cylinders can be increased. The specific structure is not shown in the figure. These methods are conventional means, so the specific structural principles will not be elaborated on.

[0064] In an optional embodiment, the Y-axis moving drive component 74 is a screw guide rail module 741.

[0065] The Y-direction moving driving member 74 adopts a screw rod to a mold assembly, so that the Y-direction movement of the connecting seat 731 and the roller 732 is more stable.

[0066] In an optional embodiment, the circumference of the roller 732 is smaller than the length of the first sealing heating block 712 .

[0067] In the above structure, by reducing the circumference of the roller 732, the roller 732 can stay on the Y side of the third conveyor belt 4 when it is not needed for sealing and cutting, and the surface interferes with the vegetables on the conveyor belt.

[0068] In an optional embodiment, the length of the screw guide rail module 741 is longer than the length of the first sealing heating block 712 .

[0069] In the above structure, when the roller 732 is not needed for sealing and cutting, it can stay on the Y-direction side of the third conveyor belt 4, and the surface interferes with the vegetables on the conveyor belt.

[0070] In an optional embodiment, the film folding mechanism 5 includes two triangular guide plates symmetrically distributed on both sides of the starting end of the second conveyor belt 3 .

[0071] The packaging method of the vegetable packaging machine involved in the above embodiment comprises the following steps:

[0072] Step 1: The vegetables to be packaged are placed on the first conveyor belt 2 at a certain interval manually or by a robot, and the vegetables are passed through the second conveyor belt 3 and the third conveyor belt 4 in sequence;

[0073] Step 2: When the vegetables pass through the beginning of the second conveyor belt 3, the packaging film is guided from the beginning of the conveyor belt to the second conveyor belt 3 by the film folding device, and the film folding device bends both sides of the packaging film in the Y direction, gathers them together, and guides them to the middle sealing mechanism 6;

[0074] Step 3: The two sides of the packaging film are connected to each other by heat-melting sealing through the middle sealing mechanism 6, so that the vegetables are wrapped in the cylindrical packaging film;

[0075] Step 4: The vegetables continue to be transported in the X direction. When the packaging film between two adjacent vegetables moves to the sealing, heating and cutting mechanism 7, the Y-direction driving member is controlled to drive the connecting seat 731 to move a short distance along the Y direction, so that the roller 732 is located above one end of the first sealing, heating and cutting component 71;

[0076] The vertical moving driving member 72 is controlled to drive the first sealing heating and cutting assembly 71 to move upward to a position higher than the upper surface of the second conveyor belt 3, so that one end of the first sealing heating and cutting assembly 71 contacts the surface of the roller 732, so that one end of the first sealing heating block 712 and the lower end of the second sealing heating block 734 are in contact, and one end of the first cutting knife 711 and the lower end of the second cutting knife 733 are in close contact with each other in a displaced manner;

[0077] The Y-direction moving driving member 74 is controlled to continue to drive the connecting seat 731 to move along the Y-direction, so that the roller 732 rolls on the upper surface of the first sealing heating and cutting component 71 to the other end, so that the packaging film is cut, and the two sides of the cut portion of the packaging film are respectively hot-melt sealed;

[0078] The vertical moving driving member 72 is controlled to drive the first sealing, heating and cutting assembly 71 to move downward to below the upper surface of the second conveyor belt 3, and the Y-direction moving driving member 74 is controlled to drive the connecting seat 731 to move a short distance along the Y direction, so that the roller 732 moves to the upper side of the first sealing, heating and cutting assembly 71 in the Y direction;

[0079] Step 5: Control the second conveyor belt 3 and the third conveyor belt 4 to continue to transport the vegetables in the X direction. When the next packaging film located between two adjacent vegetables moves to the sealing, heating and cutting mechanism 7, repeat the above step 4.

[0080] In the above method, after the roller 732 completes one packaging film sealing and cutting, it does not need to return to its original position, but only needs to move in the opposite direction when the packaging film is sealed and cut next time. For example, when sealing and cutting for the first time, it moves from the right side to the left side, and when sealing and cutting for the second time, it moves from the left side to the right side.

[0081] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A vegetable packaging machine, characterized in that: include: frame; A first conveyor belt, wherein the first conveyor belt is connected to the frame, and the conveying direction of the first conveyor belt is an X direction; A second conveyor belt, wherein the second conveyor belt is connected to the frame, the starting end of the second conveyor belt is located at the end of the first conveyor belt, and the conveying direction of the second conveyor belt is an X direction; A third conveyor belt, the third conveyor belt is connected to the frame, the starting end of the third conveyor belt is located at the end of the second conveyor belt, and the conveying direction of the third conveyor belt is X direction; A film folding mechanism, the film folding mechanism is located on both sides of the starting end of the second conveyor belt, and the film folding mechanism is used to bend and guide both sides of the packaging film in the Z direction respectively; A center sealing mechanism, the center sealing mechanism is located above the second conveyor belt, the center sealing mechanism is located in front of the film folding mechanism relative to the conveying direction of the second conveyor belt, and the center sealing mechanism is used to hot-melt seal and connect the two sides of the packaging film; A sealing heating and cutting mechanism, the sealing heating and cutting mechanism is located between the second conveyor belt and the third conveyor belt, the sealing heating and cutting mechanism comprises a first sealing heating and cutting component and a second sealing heating and cutting component; the first sealing heating and cutting component comprises a first sealing heating and cutting component body and a vertical moving driving component, the vertical moving driving component is used to drive the first sealing heating and cutting component body to move in a vertical direction; The first sealing heating and cutting member comprises a first cutter arranged along a straight line in the Y direction, and first sealing heating blocks arranged along a straight line in the Y direction are respectively arranged on both sides of the first cutter in the X direction; The sealing heating and cutting mechanism comprises a second sealing heating and cutting assembly and a Y-direction movable driving member; the second sealing heating and cutting assembly comprises a movable connecting seat and a roller, the roller is rotatably connected to the movable connecting seat, the movable connecting seat is connected to the Y-direction movable driving member, the Y-direction movable driving member is used to drive the movable connecting seat to move along the Y direction, and the second sealing heating and cutting assembly is located above the first sealing heating and cutting assembly; The axial direction of the roller is the X direction, and a circular second cutter is provided in the middle of the circumferential surface of the roller. Circular second sealing heating blocks are respectively provided on both sides of the X direction of the second cutter. The second sealing heating block is located in the same vertical plane as one of the first sealing heating blocks.

2. The vegetable packaging machine according to claim 1, characterized in that: The center sealing mechanism is provided with an arc-shaped guide block at the rear relative to the conveying direction, and the arc-shaped guide block is used to guide both side edges of the packaging film toward the middle to the center sealing mechanism.

3. The vegetable packaging machine according to claim 1, characterized in that: The center sealing mechanism comprises two symmetrically distributed heating conveyor belts, and belt surfaces on opposite sides of the two heating conveyor belts are in contact with each other.

4. The vegetable packaging machine according to claim 1, characterized in that: The vertical movement driving member includes a cylinder or a hydraulic cylinder.

5. The vegetable packaging machine according to claim 1, characterized in that: The Y-axis moving driving component is a screw guide rail module.

6. The vegetable packaging machine according to claim 1, characterized in that: The circumference of the roller is smaller than the length of the first sealing heating block.

7. The vegetable packaging machine according to claim 5, characterized in that: The length of the screw guide rail module is longer than the length of the first sealing heating block.

8. The vegetable packaging machine according to claim 1, characterized in that: The film folding mechanism comprises two triangular guide plates which are symmetrically distributed on both sides of the starting end of the second conveyor belt.

9. The packaging method of a vegetable packaging machine according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: The vegetables to be packaged are placed on the first conveyor belt at a certain interval by manual or mechanical means, and the vegetables are passed through the second conveyor belt and the third conveyor belt in turn; Step 2: When the vegetables pass through the starting end of the second conveyor belt, the packaging film is guided from the starting end of the conveyor belt to the second conveyor belt under the action of the film folding device, and the film folding device bends both sides of the packaging film in the Y direction, gathers them together, and guides them to the middle sealing mechanism; Step 3: The two sides of the packaging film are connected to each other by heat-melting sealing through a central sealing mechanism, so that the vegetables are wrapped in the cylindrical packaging film; Step 4: The vegetables continue to be transported in the X direction. When the packaging film between two adjacent vegetables moves to the sealing, heating and cutting mechanism, the Y-direction driving member is controlled to drive the connecting seat to move a short distance along the Y direction, so that the roller is located above one end of the first sealing, heating and cutting component; Control the vertical moving drive member to drive the first sealing, heating and cutting assembly to move upward to a position higher than the upper surface of the second conveyor belt, so that one end of the first sealing, heating and cutting assembly contacts the roller surface, so that one end of the first sealing heating block is in contact with the lower end of the second sealing heating block, and one end of the first cutter is in contact with the lower end of the second cutter; Control the Y-direction moving driving member to continue to drive the connecting seat to move along the Y-direction, so that the roller rolls on the upper surface of the first sealing heating and cutting component to the other end, so that the packaging film is cut, and hot-melt sealing is performed on both sides of the cut portion of the packaging film; Control the vertical moving drive member to drive the first sealing, heating and cutting assembly to move downward to a position lower than the upper surface of the second conveyor belt, and control the Y-direction moving drive member to drive the connecting seat to move a short distance in the Y direction, so that the roller moves to the upper side of the first sealing, heating and cutting assembly in the Y direction; Step 5: Control the second conveyor belt and the third conveyor belt to continue to transport the vegetables in the X direction. When the next packaging film located between two adjacent vegetables moves to the sealing, heating and cutting mechanism, repeat the above step 4.

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