Vacuum packaging machine and using method thereof

Abstract

The invention provides a vacuum packaging machine which comprises a main equipment table, a conveying unit, a conveying unit, a conveying unit, a conveying unit, a conveying unit and a control unit, wherein the conveying unit is arranged on the annular side of the main equipment table; the top and the bottom of the feeding unit are of a penetrating type structure, and a packaging bag to be sealed is placed in the feeding unit. The packaging unit is arranged on one side of the main equipment table, the packaging unit comprises a lifting mechanism and a packaging chamber, and the packaging chamber is assembled on the lifting mechanism; the packaging chamber descends under the action of the lifting mechanism and is in butt joint with the feeding unit, a vacuum packaging area is formed by the feeding unit and the interior of the packaging chamber, and packaging bags are subjected to vacuum sealing in a vacuum environment through packaging equipment arranged in the packaging chamber. The feeding unit and the packaging chamber are in sealed butt joint to form a part of a vacuum environment, the space size of a vacuum area is reduced, the vacuum effect in the vacuum process is improved, and the situation that the vacuum packaging effect is affected by the too large space size is avoided.

Description

Technical Field

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

[0002] The vacuum packaging machine can automatically extract the air in the packaging bag and complete the sealing process after reaching a predetermined vacuum degree. It can also be filled with nitrogen or other mixed gases to complete the sealing process. Vacuum packaging machines are often used in the food industry because after vacuum packaging, the food can resist oxidation and achieve the purpose of long-term preservation.

[0003] In the field of automated vacuum packaging equipment, vacuum packaging machines usually send the packaging bags to be processed into a vacuum chamber, perform vacuum and seal the bags in the vacuum chamber, while the vacuum chamber set in the prior art needs to accommodate sealing equipment, molding structure and clamping mechanism, resulting in the need to configure a larger space for the vacuum chamber. Vacuum equipment with too large a volume will have poor vacuuming effect, affecting the effect of vacuum packaging. Summary of the invention

[0004] The present invention provides a vacuum packaging machine, aiming to solve the problem that in the prior art, a large space is required for a vacuum chamber, and the vacuuming effect of a vacuum device with a large volume is poor, thus affecting the effect of vacuum packaging.

[0005] The present invention is achieved in that a vacuum packaging machine comprises:

[0006] A main equipment platform, wherein a traction rail is provided inside the main equipment platform, and a feeding unit for loading logistics is arranged on the side of the traction rail ring; the top and bottom of the feeding unit are through-type structures, and the packaging bags to be sealed are placed inside the feeding unit, and a pallet for lifting the feeding unit is provided outside the main equipment platform;

[0007] A packaging unit, which is arranged on one side of the main equipment table, and comprises a lifting mechanism, a packaging chamber and a lifting assembly, wherein the packaging chamber is mounted on the lifting mechanism, and the lifting assembly is located below the packaging chamber;

[0008] After the feeding unit arrives between the packaging chamber and the lifting assembly, the packaging chamber descends in height under the action of the lifting mechanism and docks with the feeding unit. The lifting assembly extends into the interior of the feeding unit. The feeding unit and the interior of the packaging chamber form a vacuum packaging area. The packaging bag is vacuum-sealed under a vacuum environment through the packaging equipment provided inside the packaging chamber.

[0009] Preferably, the feeding unit comprises a main cavity, a first end plate and a second end plate, wherein the first end plate and the second end plate are respectively arranged at two ends of the main cavity, and material ports are arranged on the first end plate and the second end plate;

[0010] The first end plate is in contact with the packaging chamber, and the lifting assembly passes through the second end plate and then abuts against the packaging bag located inside the main cavity.

[0011] Preferably, the lifting assembly includes a carrying plate, a lifting mechanism and a lifting plate, a through opening is provided in the middle of the carrying plate, the lifting mechanism is provided on the side of the carrying plate away from the packaging unit, and the lifting plate is provided on the lifting mechanism. During the vacuum packaging process, the lifting plate extends through the through opening to the inside of the feeding unit under the action of the lifting mechanism.

[0012] Preferably, the packaging chamber comprises a vacuum chamber and a connecting plate, the vacuum chamber is assembled on the connecting plate, and the connecting plate is fixedly connected to the lifting mechanism.

[0013] Preferably, the vacuum chamber comprises a main chamber and a sub-chamber, wherein the sub-chamber is arranged on both sides of the main chamber.

[0014] The main chamber is provided with a connection port and a vacuum tube connection port for connecting a vacuum pipeline; the feeding unit extends from the connection port into the main chamber, and the sub-chamber is provided with a bag clamping and heat sealing mechanism.

[0015] Preferably, the bag clamping heat sealing mechanism includes a sealing unit and a pressing plate. There are two groups of bag clamping heat sealing mechanisms, which are arranged in different sub-chambers opposite to each other. The packaging bag to be sealed enters the main chamber from the connecting port provided at the bottom of the main chamber. The two groups of sealing units and pressing plates will approach each other to clamp the packaging bag to be sealed to complete the sealing.

[0016] Preferably, a first sealing ring is further provided at the connection port, and when the first end plate is in contact and connected with the bottom of the main chamber, the first sealing ring fills the gap between the first end plate and the main chamber.

[0017] Preferably, a second sealing ring is provided on the outer edge of the lifting plate, and the second sealing ring fills the gap between the lifting plate and the inner wall of the main cavity.

[0018] Preferably, a guide plug plate is further provided on the first end plate, and when the height of the packaging chamber is lowered, the guide plug plate is inserted into the interior of the connection port.

[0019] A method for using the vacuum packaging machine as described above comprises the following steps:

[0020] Step 1: The main equipment platform pulls the empty feeding unit from the unloading area to the receiving area, and the empty feeding unit completes the loading of the packaging bags to be sealed in the receiving area;

[0021] Step 2: The loaded feeding unit is lifted by the pallet to the packaging area between the receiving area and the unloading area, and the lifting assembly supports the feeding unit instead of the pallet;

[0022] Step 3: The packaging chamber is lowered under the action of the lifting mechanism and docked with the first end plate of the feeding unit, and the first sealing ring fills the gap between the first end plate and the main chamber;

[0023] Step 4: The lifting assembly pushes the lifting plate into the feeding unit through the lifting mechanism, the bag clamping and heat sealing mechanism clamps and limits the top of the packaging bag to be sealed, and the lifting plate pushes the packaging bag to be sealed close to the packaging chamber. Under the pressure of the lifting plate, the packaging bag to be sealed is extruded and formed in the main cavity;

[0024] Step 5: After the extrusion action is completed, the main cavity and the packaging chamber are evacuated by the vacuum equipment, and the bag clamping and heat sealing mechanism seals the formed packaging bag to be sealed under a vacuum environment.

[0025] Step 6: After vacuum packaging is completed, the packaging chamber and the lifting assembly are separated from the contact with the feeding unit, and the packaging bag is sent to the unloading area along with the feeding unit. After unloading, the feeding unit returns to the receiving area.

[0026] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0027] The vacuum packaging machine provided by the present invention realizes sealed docking with the packaging chamber through the feeding unit itself, becoming a part of the vacuum environment, and helps rapid extrusion molding through the lifting component to reduce the spatial volume of the vacuum area. On the one hand, the vacuum effect during the vacuum process is improved to avoid the excessive spatial volume affecting the vacuum packaging effect. On the other hand, it can also reduce the need for the vacuum effect of the vacuum equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention is a schematic structural diagram of a vacuum packaging machine.

[0029] Figure 2 It is a schematic diagram of the top plan structure of a vacuum packaging machine provided by the present invention.

[0030] Figure 3 It is a schematic diagram of the packaging unit structure of a vacuum packaging machine provided by the present invention.

[0031] Figure 4 It is a structural schematic diagram of a packaging chamber in a vacuum packaging machine provided by the present invention.

[0032] Figure 5 The invention discloses a schematic structural diagram of a lifting mechanism of a vacuum packaging machine.

[0033] Figure 6 It is a structural schematic diagram of a feeding unit of a vacuum packaging machine provided by the present invention.

[0034] Figure 7 The present invention is a schematic diagram of the structure of a lifting component of a vacuum packaging machine.

[0035] Figure 8 It is a structural schematic diagram of a feeding unit of a vacuum packaging machine provided by the present invention.

[0036] Description of reference numerals:

[0037] 100, main equipment platform; 101, material receiving area; 102, material unloading area; 103, packaging area; 110, material guide slide; 120, pallet; 130, material receiving guide trough;

[0038] 200, feeding unit; 210, main cavity; 220, first end plate; 230, second end plate; 240, guide plate;

[0039] 300, packaging unit; 310, supporting frame; 320, lifting mechanism; 330, packaging chamber; 331, vacuum chamber; 3311, main chamber; 3312, sub-chamber; 332, connection port; 333, vacuum tube connection port; 340, lifting assembly; 341, load-bearing plate; 342, lifting mechanism; 343, lifting plate; 351, sealing unit; 352, pressing plate. DETAILED DESCRIPTION

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0041] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] The embodiment of the present invention provides a vacuum packaging machine, such as Figure 1-Figure 8 As shown, the vacuum packaging machine comprises:

[0043] A main equipment platform 100, wherein a traction guide rail is provided inside the main equipment platform 100, and a feeding unit 200 for loading logistics is arranged on the ring side of the traction guide rail; the rotation plane of the traction guide rail is parallel to the horizontal plane, and the feeding unit 200 is connected to the conveying chain of the traction guide rail by side hanging;

[0044] The top and bottom of the feeding unit 200 are through-type structures. The main equipment platform 100 is provided with a receiving area 101 and a discharging area 102 at both ends. The receiving area 101 is provided with a receiving guide groove 130. The top of the feeding unit 200 receives the packaging bag to be sealed that slides down in the receiving guide groove 130. A support plate 120 is provided on the outside of the main equipment platform 100. The support plate 120 supports the bottom of the feeding unit 200 to prevent the packaging bag from detaching from the feeding unit 200 during the process of the receiving area 101 moving to the discharging area 102.

[0045] The packaging unit 300 is arranged at one side of the main equipment platform 100. The packaging unit 300 includes a lifting mechanism 320, a packaging chamber 330 and a lifting assembly 340. The packaging chamber 330 is assembled on the lifting mechanism 320, and the lifting assembly 340 is located below the packaging chamber 330. The packaging unit 300 is arranged in the packaging area 103. When the feeding unit 200 arrives at the packaging area 103, the lifting assembly 340 replaces the pallet 120 to support the feeding unit 200.

[0046] After the feeding unit 200 arrives between the packaging chamber 330 and the lifting assembly 340, the packaging chamber 330 is lowered by the lifting mechanism 320 and docked with the feeding unit 200. The lifting assembly 340 extends into the feeding unit 200. The feeding unit 200 and the packaging chamber 330 form a vacuum packaging area. The packaging equipment provided in the packaging chamber 330 vacuum-seals the packaging bag under a vacuum environment.

[0047] In this embodiment, the feeding unit 200 is sealed and docked with the packaging chamber 330, becoming part of the vacuum environment. The lifting assembly 340 helps to quickly extrude and shape the material, thereby reducing the space volume of the vacuum area. On the one hand, it reduces the need for the vacuum effect of the vacuum equipment, and on the other hand, it can also improve the vacuum effect during the vacuum process, thereby preventing the excessive space volume from affecting the effect of the vacuum packaging.

[0048] In this embodiment, the traction guide rail adopts the existing conveyor belt technology, mainly using the reciprocating traction motion of the conveyor belt, and the feeding unit 200 is mounted on the conveyor belt and rotates synchronously with the conveyor belt. The receiving area 101 is provided with a receiving guide groove 130 fixed on the main equipment platform 100, and the receiving guide groove 130 is arranged below the existing weighing and metering equipment. After the weighing and metering equipment releases the clamping effect, the packaging bag filled with materials slides along the receiving guide groove 130 and falls into the feeding unit 200. The loading, clamping and other structures here are all existing loading technology equipment, which will not be described in detail here;

[0049] The unloading area 102 is provided with a material guide slide 110. Since the bottom of the feeding unit 200 is also an open structure, it is supported by the support plate 120 and the lifting assembly 340 respectively during the normal conveying and packaging process. After reaching the unloading area 102, the packaging bag will slide off from the bottom of the feeding unit 200 without the support of the support plate 120 and reach the collection frame or other collection equipment along the material guide slide 110.

[0050] As a preferred implementation in this embodiment, the feeding unit 200 includes a main cavity 210, a first end plate 220 and a second end plate 230, wherein the first end plate 220 and the second end plate 230 are respectively arranged at two ends of the main cavity 210, and the first end plate 220 and the second end plate 230 are provided with material ports;

[0051] The first end plate 220 is in contact with and connected to the packaging chamber 330 , and the lifting assembly 340 passes through the second end plate 230 and then abuts against the packaging bag located inside the main cavity 210 .

[0052] In this embodiment, the main cavity 210 serves as the main bearing area of ​​the packaging bag. The size of the packaging bag after filling the material is slightly smaller than the size of the main cavity 210. The first end plate 220 and the second end plate 230 are provided with material ports to facilitate the packaging bag to enter and exit the main cavity 210. During the packaging process, the lifting assembly 340 will lift the packaging bag to form a rectangular structure similar to the inner wall structure of the main cavity 210.

[0053] As a preferred implementation in this embodiment, the packaging chamber 330 includes a vacuum chamber 331 and a connecting plate, the vacuum chamber 331 is assembled on the connecting plate, and the connecting plate is fixedly connected to the lifting mechanism 320; the vacuum chamber 331 includes a main chamber 3311 and a sub-chamber 3312, the sub-chamber 3312 is arranged on both sides of the main chamber 3311, and a bag clamping heat sealing mechanism is arranged in the sub-chamber 3312;

[0054] The bag clamping heat sealing mechanism includes a sealing unit 351 and a pressing plate 352. The bag clamping heat sealing mechanism is in two groups, which are arranged in different sub-chambers 3312 opposite to each other. The packaging bag to be sealed enters the main chamber 3311 from the connection port 332 provided at the bottom of the main chamber 3311. The two groups of sealing units 351 and pressing plates 352 will approach each other to clamp the sealed packaging bag to complete the sealing operation.

[0055] The sealing unit 351 here is an existing packaging bag sealing device, and the pressing plate 352 is mainly used to restrict and shape the top of the packaging bag during the sealing process;

[0056] The main chamber 3311 is provided with a connection port 332 and a vacuum tube connection port 333; the first end plate 220 is also provided with a guide plug plate 240, and when the height of the packaging chamber 330 is lowered, the guide plug plate 240 is inserted into the interior of the connection port 332; the vacuum tube connection port 333 is connected to a vacuum device provided outside, and the packaging chamber 330 and the interior of the main cavity 210 are vacuumized by the vacuum of the outside;

[0057] In this embodiment, the bag clamping heat sealing mechanism and the vacuum device are both existing technologies. The bag clamping heat sealing mechanism uses a clamping member to initially limit and fix the bag opening before sealing, and limits the position when the lifting component 340 lifts the packaging bag to complete the purpose of extrusion molding;

[0058] In a further preferred embodiment of the present invention, the lifting assembly 340 includes a bearing plate 341, a lifting mechanism 342 and a lifting plate 343. A through hole is provided in the middle of the bearing plate 341. The lifting mechanism 342 is provided on a side of the lifting plate 343 away from the packaging unit 300. The lifting plate 343 is provided on the lifting mechanism 342. During the vacuum packaging process, the lifting plate 343 extends through the through hole to the inside of the feeding unit 200 under the action of the lifting mechanism 342.

[0059] In this embodiment, both the lifting mechanism 342 and the lifting mechanism 320 adopt electric push rod technology, and the main equipment platform 100 is provided with a support frame 310, and the lifting mechanism 320 is assembled on the support frame 310, the push rod part of the lifting mechanism 320 is connected to the connecting plate, the bearing plate 341 is fixedly connected to the support frame 310, and the push rod part of the lifting mechanism 342 is connected to the lifting plate 343; the lifting mechanism 320 will push the packaging chamber 330 as a whole to approach the lifting mechanism 342, so that the height of the packaging chamber 330 is reduced, and the first end plate 220 of the feeding unit 200 is inserted into the connecting port 332 to form an integral structure, and the connecting port 332

[0060] As a preferred implementation in this embodiment, a first sealing ring is further provided at the connection port 332. When the first end plate 220 is in contact with the bottom of the main chamber 3311, the first sealing ring fills the gap between the first end plate 220 and the main chamber 3311. A guide plug plate 240 is further provided on the first end plate 220. When the height of the packaging chamber 330 is lowered, the guide plug plate 240 is inserted into the interior of the connection port 332. A second sealing ring is provided at the outer edge of the lifting plate 343. The second sealing ring fills the gap between the lifting plate 343 and the inner wall of the main chamber 210.

[0061] In this embodiment, the first sealing ring and the second sealing ring adopt the existing technology, mainly for the purpose of improving the sealing effect and enhancing the vacuum degree during the vacuum process;

[0062] The embodiment of the present invention further provides a method for using the vacuum packaging machine as described above, comprising:

[0063] Step 1: The main equipment station 100 pulls the empty feeding unit 200 from the unloading area 102 to the receiving area 101, and the empty feeding unit 200 completes the loading of the packaging bags to be sealed in the receiving area 101;

[0064] Step 2: The loaded feeding unit 200 is lifted by the pallet 120 to the packaging area 103 between the receiving area 101 and the unloading area 102, and the lifting assembly 340 replaces the pallet 120 to support the feeding unit 200;

[0065] Step 3: The packaging chamber 330 is lowered under the action of the lifting mechanism 320 and docked with the first end plate 220 of the feeding unit 200, and the first sealing ring fills the gap between the first end plate 220 and the main chamber 3311;

[0066] Step 4: The lifting assembly 340 pushes the lifting plate 343 into the feeding unit 200 through the lifting mechanism 342, and the bag clamping and heat sealing mechanism clamps and limits the top of the packaging bag to be sealed, and the lifting plate 343 pushes the packaging bag to be sealed to the packaging chamber 330. Under the pressure of the lifting plate 343, the packaging bag to be sealed is extruded and formed in the main cavity 210;

[0067] Step 5: After the extrusion action is completed, the main cavity 210 and the packaging chamber 330 are evacuated by the vacuum equipment, and the bag clamping and heat sealing mechanism seals the formed packaging bag to be sealed.

[0068] Step 6: After vacuum packaging is completed, the packaging chamber 330 and the lifting assembly 340 are separated from the contact with the feeding unit 200, and the packaging bag is accompanied by the feeding unit 200 to the unloading area 102. The feeding unit 200 that has completed unloading returns to the receiving area 101.

[0069] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described order of actions, because according to the present invention, some steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0070] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A vacuum packaging machine, characterized in that: include: A main equipment platform (100), wherein a traction rail is provided inside the main equipment platform (100), and a feeding unit (200) for loading logistics is arranged on the side of the traction rail ring; the top and bottom of the feeding unit (200) are through-type structures, and the packaging bags to be sealed are placed inside the feeding unit (200); and a support plate (120) for lifting the feeding unit (200) is provided outside the main equipment platform (100); A packaging unit (300), the packaging unit (300) being arranged on one side of the main equipment platform (100), the packaging unit (300) comprising a lifting mechanism (320), a packaging chamber (330) and a lifting assembly (340), the packaging chamber (330) being mounted on the lifting mechanism (320), and the lifting assembly (340) being located below the packaging chamber (330); After the feeding unit (200) reaches between the packaging chamber (330) and the lifting assembly (340), the packaging chamber (330) is lowered under the action of the lifting mechanism (320) and docks with the feeding unit (200), and the lifting assembly (340) extends into the interior of the feeding unit (200). The feeding unit (200) and the interior of the packaging chamber (330) form a vacuum packaging area, and the packaging bag is vacuum-sealed in a vacuum environment through the packaging equipment provided in the packaging chamber (330).

2. A vacuum packaging machine as claimed in claim 1, characterized in that: The feeding unit (200) comprises a main cavity (210), a first end plate (220) and a second end plate (230), wherein the first end plate (220) and the second end plate (230) are respectively arranged at two ends of the main cavity (210), and the first end plate (220) and the second end plate (230) are provided with material ports; The first end plate (220) is in contact with and connected to the packaging chamber (330), and the lifting assembly (340) passes through the second end plate (230) and then abuts against the packaging bag located inside the main cavity (210).

3. A vacuum packaging machine as claimed in claim 2, characterized in that: The lifting assembly (340) includes a supporting plate (341), a lifting mechanism (342) and a lifting plate 343. A through hole is provided in the middle of the supporting plate (341). The lifting mechanism (342) is connected to the side of the supporting plate (341) away from the packaging unit (300). The lifting plate 343 is arranged on the lifting mechanism (342). During the vacuum packaging process, the lifting plate 343 passes through the through hole under the action of the lifting mechanism (342) and extends to the inside of the feeding unit (200).

4. A vacuum packaging machine as claimed in claim 3, characterized in that: The packaging chamber (330) comprises a vacuum chamber (331) and a connecting plate, the vacuum chamber (331) is assembled on the connecting plate, and the connecting plate is fixedly connected to the lifting mechanism (320).

5. A vacuum packaging machine as claimed in claim 4, characterized in that: The vacuum chamber (331) includes a main chamber (3311) and a sub-chamber (3312), wherein the sub-chamber (3312) is arranged on both sides of the main chamber (3311). The main chamber (3311) is provided with a connection port (332) and a vacuum tube connection port (333) for connecting a vacuum pipeline; the feeding unit (200) extends from the connection port (332) into the main chamber (3311), and the sub-chamber (3312) is provided with a bag clamping and heat sealing mechanism.

6. A vacuum packaging machine as claimed in claim 5, characterized in that: There are two groups of bag clamping and heat-sealing mechanisms, which are arranged in different sub-chambers (3312) opposite to each other. The bag clamping and heat-sealing mechanisms include a sealing unit (351) and a pressing plate (352). The packaging bag to be sealed enters the main chamber (3311) from the connecting port (332) provided at the bottom of the main chamber (3311). The two groups of sealing units (351) and the pressing plate (352) will approach each other to clamp the packaging bag to be sealed to complete the sealing.

7. A vacuum packaging machine as claimed in claim 6, characterized in that: A first sealing ring is also provided at the connection port (332). When the first end plate (220) is in contact and connected with the bottom of the main chamber (3311), the first sealing ring fills the gap between the first end plate (220) and the main chamber (3311).

8. A vacuum packaging machine as claimed in claim 7, characterized in that: A second sealing ring is provided on the outer edge of the lifting plate 343, and the second sealing ring fills the gap between the lifting plate (343) and the inner wall of the main cavity (210).

9. A vacuum packaging machine as claimed in claim 8, characterized in that: The first end plate (220) is also provided with a guide plug plate (240), and when the height of the packaging chamber (330) is lowered, the guide plug plate (240) is inserted into the interior of the connection port (332).

10. A method for using the vacuum packaging machine according to claim 9, characterized in that: The steps include: Step 1: The main equipment platform (100) pulls the empty feeding unit (200) from the unloading area (102) to the receiving area (101), and the empty feeding unit (200) completes the loading of the packaging bags to be sealed in the receiving area (101); Step 2: The loaded feeding unit (200) is lifted by the pallet (120) to the packaging area (103) between the receiving area (101) and the unloading area (102), and the lifting assembly (340) replaces the pallet (120) to support the feeding unit (200); Step 3: The packaging chamber (330) is lowered under the action of the lifting mechanism (320) and docked with the first end plate (220) of the feeding unit (200), and the first sealing ring fills the gap between the first end plate (220) and the main chamber (3311); Step 4: The lifting assembly (340) pushes the lifting plate (343) into the feeding unit (200) through the lifting mechanism (342); the bag clamping and heat-sealing mechanism clamps and limits the top of the packaging bag to be sealed; the lifting plate (343) pushes the packaging bag to be sealed close to the packaging chamber (330); and the packaging bag to be sealed is extruded and formed in the main cavity (210) under the pressure of the lifting plate (343); Step 5: After the extrusion action is completed, the main cavity (210) and the packaging chamber (330) are subjected to a vacuum treatment under the action of a vacuum device, and the bag clamping and heat sealing mechanism performs a sealing treatment on the formed packaging bag to be sealed under a vacuum environment; Step 6: After vacuum packaging is completed, the packaging chamber (330) and the lifting assembly (340) are separated from the contact with the feeding unit (200), and the packaging bag is accompanied by the feeding unit (200) to the unloading area (102). After unloading, the feeding unit (200) returns to the receiving area (101).

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