Vacuumizing method for packaging machine

Abstract

The invention relates to the technical field of material packaging, and discloses a vacuumizing method for a packaging machine. The invention discloses a vacuumizing method for a packaging machine. The vacuumizing method comprises the following steps that a machine clamping body module clamped with a packaging bag is conveyed to a vacuumizing station; a vacuum tube assembly is inserted into the packaging bag, and the packaging bag is sealed; the machine clamp body module is driven to move at the vacuumizing station along the preset path, the vacuumizing station is provided with an air exhaust channel along the preset path, in the process that the machine clamp body module moves along the preset path, the vacuum pipe assembly is communicated with the air exhaust channel, and the vacuum device extracts air in the packaging bag through the air exhaust channel. And the machine clamp body module leaves the vacuumizing station until the vacuumizing is finished.

Description

Technical Field

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

[0002] The current method of packaging materials using a packaging machine is: the bag loading device delivers the packaging bag to the bag holding device, the bag holding device fixes the packaging bag, the bag holding device drives the packaging bag to move to the loading station, the loading device conveys the material into the packaging bag, the bag holding device continues to drive the packaging bag to the vacuuming station, the vacuuming device is used to vacuum the packaging bag at the vacuuming station, after the vacuuming is completed, the bag holding device conveys the packaging bag to the sealing station, the sealing device seals the packaging bag, and the sealed packaging bag is conveyed to the conveyor belt for output.

[0003] The mass production of materials on factory assembly lines requires efficient packaging technology. The time spent on each process in the packaging process needs to be as short as possible to package more materials per unit time. In the current packaging method, vacuuming needs to be performed after the packaging bag reaches the vacuuming station, and the vacuuming station is fixed. The vacuuming process is from the end of the loading process to the start of the sealing process. The actual time spent on the vacuuming process = the time to transport the packaging bag from the loading station to the vacuuming station + the vacuuming time + the time to transport to the sealing station after vacuuming. It can be seen that the time for transporting the packaging bag occupies a large proportion of the time of the vacuuming process, which is not conducive to improving packaging efficiency. Summary of the invention

[0004] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology and provide a packaging method and a packaging machine.

[0005] In order to solve the above technical problems, the technical solution of the present invention is:

[0006] A vacuuming method for a packaging machine comprises the following steps:

[0007] Transport the clamping body module with the packaging bag clamped to the vacuum pumping station;

[0008] inserting the vacuum tube assembly into the packaging bag and sealing the packaging bag;

[0009] The machine clamp body module is driven to move along a preset path at the vacuum pumping station, and the vacuum pumping station is provided with an exhaust channel along the preset path. During the movement of the machine clamp body module along the preset path, the vacuum tube assembly is connected with the exhaust channel, and the vacuum device extracts the gas in the packaging bag through the exhaust channel until the vacuum pumping is completed and the machine clamp body module leaves the vacuum pumping station.

[0010] Further, inserting the vacuum tube assembly into the packaging bag comprises:

[0011] When the machine clamp body module enters the vacuum pumping station, the vacuum tube assembly on the machine clamp body module is turned over so that the vacuum nozzle in the vacuum tube assembly is inserted into the packaging bag;

[0012] The vacuum tube assembly includes a vacuum tube arranged parallel to the machine clamp body module and a vacuum suction nozzle distributed on the vacuum tube. When the vacuum tube assembly on the machine clamp body module is turned over, the vacuum suction nozzle is inserted into the packaging bag.

[0013] Furthermore, when the machine clamp body module enters the vacuum pumping station, the vacuum tube flips from the first position to the second position;

[0014] When the vacuum tube is located at the first position, the vacuum tube is located far away from the packaging bag, and when the vacuum tube is located at the second position, the vacuum tube is located close to the packaging bag.

[0015] Further, one end of the vacuum tube is fixed on a chain, and the chain is driven by a sprocket connected to a driving device;

[0016] When the machine clamp body module enters the vacuum station, the sprocket drives the chain to rotate to drive the vacuum tube to flip from the first position to the second position.

[0017] Furthermore, a plurality of holes are provided on the exhaust channel along a preset path. When the machine clamp body module moves along the preset path, the vacuum tube assembly is sequentially connected with the holes on the exhaust channel to continuously extract the gas in the packaging bag until the vacuuming is completed.

[0018] Furthermore, the machine clamp body module is provided with a vacuum connecting pipe connected to the vacuum tube assembly, one end of the vacuum connecting pipe is provided with a hollow sealing slider, and the sealing slider is provided with a cavity for communicating with the air extraction channel;

[0019] When the machine clamp body module moves in the vacuum station, the sealing slider fits against the surface of the exhaust channel, and during the movement, the cavity inside it is connected with the holes on the exhaust channel in sequence.

[0020] Furthermore, the step of sealing the packaging bag includes:

[0021] When the vacuum assembly is inserted into the packaging bag, the driving member drives the first sealing member and the second sealing member to move in a direction close to the vacuum tube assembly, and when the vacuum assembly is inserted into the packaging bag, the driving member causes the first sealing member and the second sealing member to clamp the packaging bag so that the packaging bag is sealed and attached to the vacuum tube assembly;

[0022] The vacuum tube assembly comprises a vacuum tube and a vacuum nozzle connected to the vacuum tube. A first sealing member and a second sealing member arranged crosswise are arranged on the vacuum tube. The first sealing member and the second sealing member are connected to a driving member.

[0023] Furthermore, the first sealing member and the second sealing member are hinged on the vacuum tube to form a fork arm. When the vacuum tube flips from the first position to the second position, the driving member drives the first sealing member and the second sealing member to move toward the direction close to the vacuum nozzle.

[0024] Furthermore, when the vacuum tube assembly is inserted into the packaging bag, the driving member is lifted and moves in a direction away from the vacuum tube, and the first connecting rod and the second connecting rod hinged to the driving member move in a direction close to the vacuum nozzle;

[0025] The driving member includes a push rod, a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are respectively hinged on the push rod through a first rocker arm and a second rocker arm, the first sealing member is hinged to the vacuum tube and the second connecting rod, the second sealing member is hinged to the vacuum tube and the first connecting rod, when the vacuum tube rotates from the first position to the second position, the push rod contacts the machine clamp body module and causes the push rod to move away from the vacuum tube.

[0026] Compared with the prior art, the advantages of the present invention are: the vacuum pumping method for a packaging machine provided by the present invention utilizes the process of transporting the packaging bag from the loading station to the sealing station to seal the packaging bag, thereby realizing two functions in one process - transporting and vacuum pumping, saving the time that the packaging bag waits for vacuum pumping to be completed at the vacuum pumping station in the existing packaging process, thereby shortening the time required for the vacuum pumping process, effectively improving the packaging efficiency, shortening the overall time consumed in the packaging process, and being suitable for packaging products on production lines with larger flow rates. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the vacuum pumping device of the present invention;

[0028] Figure 2 for Figure 1 A partial enlargement of the vacuum device shown Figure Ⅰ ;

[0029] Figure 3 It is a schematic diagram of the state of the vacuum device of the present invention clamping a packaging bag;

[0030] Figure 4 It is a schematic diagram of the three-dimensional structure of the vacuum pumping device of the present invention when it does not include the machine clamping body module;

[0031] Figure 5 for Figure 4 A schematic diagram of the front view of the vacuum pumping device shown;

[0032] Figure 6 is a schematic diagram of the three-dimensional structure of a vacuum tube assembly;

[0033] Figure 7 for Figure 6 A partial enlargement of the vacuum tube assembly shown Figure II ;

[0034] Figure 8 for Figure 6 A schematic diagram of the front view of the vacuum tube assembly shown;

[0035] Fig. 9 for Figure 6 A schematic diagram of the structure of the vacuum tube assembly shown in FIG.

[0036] Fig.10 It is a schematic diagram of the three-dimensional structure of the packaging machine;

[0037] In the figure: the exhaust channel 100, the hole 101, the vacuum connecting pipe 201, the vacuum nozzle 202, the vacuum tube 203, the vacuum interface 2031, the support plate 204, the sprocket 205, the chain 206, the first seal 207, the second seal 208, the push rod 209, the first connecting rod 210, the second connecting rod 211, the first rocker arm 212, the second rocker arm 213, the first machine clamp body 214, the second machine clamp body 215, the first push rod 216, the second push rod 217, the driving rod 218, the machine clamp body module 219, the gear 220, the rack 221, the flexible structure 300, and the packaging bag 900. DETAILED DESCRIPTION

[0038] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] The present invention provides a vacuuming method for a packaging machine, comprising the following steps:

[0040] The clamping body module 219 with the packaging bag 900 is transported to the vacuum pumping station; Figure 3 and Figure 4 As shown, the clamp body module 219 can move along a preset path, which can be a path set according to actual requirements of packaging materials. Exemplarily, the preset path can be a straight line or a curved path, wherein a straight line path can refer to a route from a starting position to a vacuum station that is a straight line along a certain direction, and a curved path can refer to a route from a starting position to a vacuum station that is a curve with an arc.

[0041] Insert the vacuum tube assembly into the packaging bag 900 and seal the packaging bag 900; the vacuum tube assembly can be inserted along a straight path, for example, the vacuum tube assembly can be inserted into the packaging bag 900 in a vertical direction or a horizontal direction, or can be inserted along a curved path, for example, the vacuum tube assembly is inserted into the packaging bag by flipping, and the movement trajectory of the end of the vacuum tube assembly is an arc; sealing the packaging bag 900 can refer to sealing the bag opening of the packaging bag 900 by external force, for example, sealing the bag opening of the packaging bag 900 by a heat sealer or a pressure sealer, so that the gas in the packaging bag 900 can only flow out through the vacuum tube assembly, so as to facilitate the vacuum tube assembly to more quickly suck the gas in the packaging bag 900.

[0042] The machine clamp body module 219 can be driven by a conveyor belt, a robotic arm or other driving device to move along a preset path in a vacuum pumping station. An exhaust channel 100 for connecting a vacuum tube assembly is distributed along the preset path. The exhaust channel 100 is connected to a vacuum device, such as a vacuum pump. During the movement of the machine clamp body module 219 along the preset path, the packaging bag 900 is sequentially connected to the exhaust channel 100 through the vacuum tube assembly. The vacuum device sequentially extracts the gas in the packaging bag 900 through the exhaust channel 100 until the machine clamp body module leaves the vacuum pumping station.

[0043] In this way, the packaging bag 900 can be vacuumed during the movement of the random clamping module 219, without limiting the efficiency of the previous packaging process due to the long vacuuming time of the vacuuming station, thereby improving the packaging efficiency.

[0044] As a possible implementation, the inserting of the vacuum tube assembly into the packaging bag includes:

[0045] When the machine clamp body module 219 enters the vacuum pumping station, the vacuum tube assembly on the machine clamp body module 219 is turned over so that the vacuum suction nozzle 202 on the vacuum tube assembly is inserted into the packaging bag 900 .

[0046] The vacuum tube assembly includes a vacuum tube 203 arranged parallel to the machine clamp body module and a vacuum nozzle 202 distributed on the vacuum tube 203. When the vacuum tube assembly 203 on the machine clamp body module 219 is turned over, the vacuum nozzle 202 is inserted into the packaging bag 900.

[0047] The vacuum tube 203 is used to set the vacuum nozzle 202. When the vacuum tube 203 is turned over, the vacuum nozzle 202 moves with the vacuum tube 203 to achieve the turning. Figure 4As shown, the vacuum tube 203 can be arranged on the support plate 204, and the movement of the support plate 204 drives the vacuum tube 203 to move. When the vacuum tube 203 enters the vacuum pumping station, the vacuum tube 203 flips from the first position to the second position. When the vacuum tube 203 is in the first position, the vacuum suction nozzle 202 on the vacuum tube 203 is away from the packaging bag 900. When the vacuum tube 203 is in the second position, the vacuum suction nozzle 202 on the vacuum tube 203 is inserted into the packaging bag.

[0048] The vacuum tube 203 can be flipped manually or mechanically. The flipping of the vacuum tube 203 can be done manually by manpower or by a mechanical mechanism, such as a rocker mechanism, a swing guide rod mechanism, a lever structure or a turntable, etc. Preferably, a support plate 204 is provided on the side of the machine clamp body module 219, and the support plate 204 is used to fix the machine clamp body module 219 and set a driving device. A pivotable chain 206 and a sprocket 205 are set on the support plate 204. When the sprocket 205 rotates, the chain 206 is driven to rotate, and one end of the vacuum tube 203 is fixed on the chain 206. When the sprocket 205 rotates, the vacuum tube 203 can be driven to flip through the chain 206.

[0049] The sprocket 205 can be driven to rotate by a motor or by other linkage methods. For example, the sprocket 205 is driven to rotate by the gear 220, and the gear 220 is driven to rotate by the rack 221. The rack 221 is vertically slidably set on the support plate 204. A cam groove is provided on the frame of the packaging machine. A slider is fixed to the rack 221. The slider slides with the cam groove. When the support plate 204 moves horizontally, the cam groove drives the slider to move vertically, thereby driving the rack 221 to move vertically, and then driving the gear 220 and the sprocket 225 to rotate, thereby converting the horizontal movement of the support plate 204 into the vertical movement of the rack 221, and the gear 220 meshing with the rack 221 is driven to rotate accordingly.

[0050] The vacuuming is performed during the process of conveying the packaging bag 900, which saves the time of vacuuming at a fixed position. To further improve the vacuuming efficiency of the packaging machine, multiple packaging bags 900 can be vacuumed at the same time, and correspondingly, multiple vacuum suction nozzles 202 need to be provided. Multiple vacuum suction nozzles 202 can be provided on the vacuum tube 203. After the vacuum tube 203 is flipped from the first position to the second position, the multiple vacuum suction nozzles 202 are simultaneously inserted into the multiple packaging bags 900 one by one, so that multiple packaging bags 900 can be vacuumed at the same time, further improving the vacuuming efficiency.

[0051] like Figure 2As shown, the clamping body module 219 may include a first clamping body 214 and a second clamping body 215, and a bag clamping station is provided between the first clamping body 214 and the second clamping body 215. The first clamping body 214 can move horizontally under the drive of the first push rod 216, and the second clamping body 215 can move horizontally under the drive of the second push rod 217. By controlling the movement direction of the first push rod 216 and the second push rod 217, the horizontal distance between the first clamping body 214 and the second clamping body 215 can be controlled. When the driving rod 218 rotates, it is used to drive the clamping position of the first clamping body 214 and the second clamping body 215 to open and close. In order to realize the simultaneous vacuuming of multiple packaging bags, multiple bag clamping stations can be provided, that is, multiple groups of the first clamping body 214 and the second clamping body 215 can be provided to form multiple bag clamping stations. Correspondingly, multiple vacuum suction nozzles 202 corresponding to the bag clamping stations need to be provided.

[0052] As a possible implementation, see Figures 1 to 5 An exhaust channel 100 is arranged near the support plate 204, and a plurality of holes 101 are arranged on the exhaust channel 100 at intervals along the extension direction of the exhaust channel 100, and the holes 101 are connected to a vacuum device; a sealing slider 222 is arranged on the support plate 204, and the sealing slider 222 is used to connect the vacuum tube 203 and the hole 101. When the driving device drives the support plate 204 to move, the sealing slider 222 is connected with the holes 101 on the exhaust channel 100 in sequence.

[0053] Exemplarily, the air extraction channel 100 may be made of a material such as a round tube, a square tube, a round steel or a square steel, and a hole 101 is formed on the round tube, the square tube, the round steel or the square steel. The hole 101 is connected to a vacuum device, for example, each hole 101 may be connected to a vacuum device, or a plurality of holes 101 may be connected to the same vacuum device. When the sealing slider 222 slides against the surface of the air extraction channel 100, the vacuum tube 203 can be connected to the holes 101 at different positions.

[0054] The support plate 204 can slide along the extension direction of the air extraction channel 100 manually or mechanically, for example, the support plate 204 can be displaced by being driven by a conveyor belt or a motor.

[0055] As an example, a valve, such as a one-way valve, can be set on the hole 101. When the sealing slider 222 reaches the position of the hole 101, the valve opens and the sealing slider 222 is connected to the hole 101. The opening or closing of the valve can be controlled by a circuit. For example, the opening or closing time of the valve can be set according to the moving speed of the sealing slider 222, so that the valve opens when the sealing slider 222 reaches the hole 101, and the valve closes when the sealing slider leaves the hole 101. The opening and closing of the valve can also be achieved by a mechanical linkage structure. For example, the valve can be pushed open by the structure of the sealing slider 222 itself, and the valve returns to its original position and closes when it leaves the hole 101.

[0056] The vacuum tube 203 may also be provided with an electric valve for sealing the vacuum suction nozzle 202, and a level detection sensor electrically connected to the electric valve. The level detection sensor is used to detect whether there is a packaging bag 900 at the position corresponding to the vacuum suction nozzle. When the vacuum tube 203 is flipped from the first position to the second position, the electric valve of the vacuum suction nozzle 202 at the corresponding position where the packaging bag 900 exists will open, and the vacuum suction nozzle 202 inserted into the packaging bag 900 will evacuate the packaging bag 900. The electric valve of the vacuum suction nozzle 202 at the corresponding position where the packaging bag 900 does not exist will be closed to avoid affecting the vacuuming of the packaging bag 900 by other vacuum suction nozzles 202.

[0057] For example, Figure 4 As shown, the sealing slider 222 may be connected to the vacuum connecting tube 201 , and the vacuum tube 203 is connected to the vacuum connecting tube 201 through linear motion or rotational motion.

[0058] When the vacuum tube 203 moves from the first position to the second position, the vacuum tube 203 is connected to the vacuum connecting tube 201. Exemplarily, the vacuum interface 2031 of the vacuum tube 203 can be connected to the vacuum connecting tube 201 through a quick connector, or the vacuum interface 2031 can be directly connected to the interface of the vacuum connecting tube 201. The vacuum tube 203 is configured to be movable from the first position to the second position, and can drive the vacuum suction nozzle 202 to move, so as to facilitate the insertion of the vacuum suction nozzle 202 into the packaging bag.

[0059] As a possible implementation, see Figure 1 , Figure 3 and Figure 4The sealing of the packaging bag can be completed by the first sealing member 207 and the second sealing member 208 arranged on both sides of the vacuum suction nozzle 202, and the first sealing member 207 and the second sealing member 208 can move in the direction close to or away from the vacuum suction nozzle; the first sealing member 207 and the second sealing member 208 can be arranged on the vacuum tube 203 in a hinged manner. In order to make the packaging bag 900 in contact with the vacuum suction nozzle 202 close to the vacuum suction nozzle 202, a flexible structure 300 can be arranged on the first sealing member 207 and the second sealing member 208, which is used to generate adaptive deformation when in contact with the vacuum suction nozzle 202, so as to clamp the packaging bag 900 on the vacuum suction nozzle 202.

[0060] The vacuum tube 203 has a vacuum interface 2031. When the vacuum interface 2031 is located at the second position, the first seal 207 and the second seal 208 are closed. The first seal 207 and the second seal 208 can be a rod-shaped structure, a plate-shaped structure or a rocker arm structure.

[0061] When the packaging bag is vacuumed, the vacuum nozzle 202 is inserted into the packaging bag. The first sealing member 207 and the second sealing member 208 clamp the vacuum nozzle 202 and the bag opening of the packaging bag to achieve a pre-sealing effect, thereby facilitating rapid vacuuming of the packaging bag.

[0062] As a possible implementation, please refer to Figures 3 to 6 The first seal 207 and the second seal 208 are hinged on the vacuum tube 203 to form a fork arm, and one end of the first seal 207 and the second seal 208 is provided with a lifting mechanism, and the lifting mechanism is used to make the first seal 207 and the second seal 208 move toward each other when the vacuum interface 2031 is located at the second position, and the clips at one end of the first seal 207 and the second seal 208 are closed.

[0063] The lifting mechanism may include a push rod 209, a first connecting rod 210 and a second connecting rod 211. The first connecting rod 210 and the second connecting rod 211 are respectively hinged on the push rod 209 through a first rocker arm 212 and a second rocker arm 213, the first sealing member 207 is hinged to the vacuum tube 203 and the second connecting rod 211, the second sealing member 208 is hinged to the vacuum tube 203 and the first connecting rod 210, a boss is provided on the support plate 204, and when the vacuum interface 2031 rotates from the first position to the second position, the push rod 209 contacts the boss and causes the push rod 209 to move in a direction away from the vacuum tube 203.

[0064] When the vacuum interface 2031 rotates from the first position to the second position, the push rod 209 gradually contacts the boss. When the push rod remains in contact with the boss, under the action of the reaction force, the push rod 209 moves away from the vacuum tube 203, thereby driving the first connecting rod 210 and the second connecting rod 211 to move away from the vacuum tube 203 through the first rocker arm 212 and the second rocker arm 213. Since the pre-sealing mechanism also includes the push rod 209, the first connecting rod 210 and the second connecting rod 211, the push rod 209 and the first connecting rod 210, the second connecting rod 211 The connecting rods 211 are hinged via the first rocker arm 212 and the second rocker arm 213 respectively; the first sealing member 207 is hinged to the vacuum tube 203 and the second connecting rod 211 at the same time; the second sealing member 208 is hinged to the vacuum tube 203 and the first connecting rod 210 at the same time; a boss is provided on the support plate 204; when the vacuum interface 2031 rotates from the first position to the second position, the push rod 209 contacts the boss and causes the push rod 209 to move away from the vacuum tube 203. The second seal 208 is hinged to the vacuum tube 203 and is also hinged to the first connecting rod 210. When the first connecting rod 210 moves away from the vacuum tube 203, the second seal 208 rotates toward the first seal 207. Similarly, driven by the second connecting rod 211, the first seal 207 also rotates toward the second seal 208. Therefore, when the push rod 209 moves away from the vacuum tube 203, the first seal 207 and the second seal 208 move toward each other to clamp the vacuum nozzle 202. When the push rod 209 moves toward the vacuum tube 203, the first seal 207 and the second seal 208 move in opposite directions to release the vacuum nozzle 202.

[0065] When multiple bag clamping stations are provided, the lifting mechanism can move the first seal 207 and the second seal 208, so that the first seal 207 and the second seal 208 can clamp or release multiple vacuum nozzles 202 and packaging bags 900 at the same time, thereby achieving the purpose of vacuuming multiple packaging bags 900 at the same time.

[0066] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A vacuuming method for a packaging machine, characterized in that: The following steps are involved: Transporting the machine clamping body module (219) clamped with the packaging bag (900) to a vacuum pumping station; Inserting a vacuum tube assembly into the packaging bag (900), and sealing the packaging bag (900); The driving machine clamp body module (219) moves along a preset path in a vacuum pumping station, wherein the vacuum pumping station is provided with a vacuum pumping channel (100) along the preset path. During the movement of the machine clamp body module (219) along the preset path, the vacuum tube assembly is connected to the vacuum pumping channel (100), and the vacuum device extracts the gas in the packaging bag (900) through the vacuum pumping channel (100) until the vacuum pumping is completed and the machine clamp body module (219) leaves the vacuum pumping station.

2. A vacuuming method for a packaging machine according to claim 1, characterized in that: The inserting of the vacuum tube assembly into the packaging bag comprises: When the machine clamp body module (219) enters the vacuum pumping station, the vacuum tube assembly on the machine clamp body module (219) is turned over so that the vacuum suction nozzle (202) in the vacuum tube assembly is inserted into the packaging bag (900); The vacuum tube assembly includes a vacuum tube (203) arranged parallel to the machine clamp body module and a vacuum suction nozzle (202) distributed on the vacuum tube (203). When the vacuum tube assembly (203) on the machine clamp body module (219) is turned over, the vacuum suction nozzle (202) is inserted into the packaging bag (900).

3. A vacuuming method for a packaging machine according to claim 2, characterized in that: When the machine clamp body module (219) enters the vacuum pumping station, the vacuum tube (203) flips from the first position to the second position; When the vacuum tube (203) is located at the first position, the vacuum tube (203) is located far away from the packaging bag (900), and when the vacuum tube (203) is located at the second position, the vacuum tube (203) is located close to the packaging bag (900).

4. A vacuuming method for a packaging machine according to claim 3, characterized in that: One end of the vacuum tube (203) is fixed on a chain (206), and the chain (206) is driven by a sprocket (205) connected to a driving device; When the machine clamp body module (219) enters the vacuum station, the sprocket (205) drives the chain (206) to rotate so as to drive the vacuum tube (203) to flip from the first position to the second position.

5. A vacuuming method for a packaging machine according to claim 1, characterized in that: The exhaust channel (100) is provided with a plurality of holes (101) along a preset path. When the machine clamp module (219) moves along the preset path, the vacuum tube assembly is sequentially connected to the holes (101) on the exhaust channel (100) to continuously extract the gas in the packaging bag (900) until the vacuuming is completed.

6. A vacuuming method for a packaging machine according to claim 5, characterized in that: The machine clamp body module (219) is provided with a vacuum connecting pipe (201) connected to the vacuum tube assembly, one end of the vacuum connecting pipe (201) is provided with a hollow sealing slider (222), and the sealing slider (222) is provided with a cavity for communicating with the air extraction channel (100); When the machine clamp body module (219) moves in the vacuum station, the sealing slider (222) fits the surface of the air extraction channel (100), and during the movement, the cavity inside it is sequentially connected with the holes (101) on the air extraction channel (100).

7. The vacuuming method for a packaging machine according to claim 1, characterized in that: The step of sealing the packaging bag comprises: When the vacuum assembly is inserted into the packaging bag (900), the driving member drives the first sealing member (207) and the second sealing member (208) to move in a direction close to the vacuum tube assembly, and when the vacuum assembly is inserted into the packaging bag (900), the driving member causes the first sealing member (207) and the second sealing member (208) to clamp the packaging bag (900) so that the packaging bag (900) is sealed and attached to the vacuum tube assembly; The vacuum tube assembly comprises a vacuum tube (203) and a vacuum suction nozzle (202) connected to the vacuum tube (203); a first sealing member (207) and a second sealing member (208) arranged crosswise are arranged on the vacuum tube (203); and a driving member is connected to the first sealing member (207) and the second sealing member (208).

8. The vacuuming method for a packaging machine according to claim 7, characterized in that: The first sealing member (207) and the second sealing member (208) are hinged on the vacuum tube (203) to form a fork arm. When the vacuum tube (203) flips from the first position to the second position, the driving member drives the first sealing member (207) and the second sealing member (208) to move in a direction close to the vacuum suction nozzle (202).

9. The vacuuming method for a packaging machine according to claim 8, characterized in that: When the vacuum tube assembly is inserted into the packaging bag (900), the driving member is lifted and moves in a direction away from the vacuum tube (203), and the first connecting rod (210) and the second connecting rod (211) hinged to the driving member move in a direction close to the vacuum suction nozzle (202); The driving member comprises a push rod (209), a first connecting rod (210) and a second connecting rod (211); the first connecting rod (210) and the second connecting rod (211) are respectively hinged on the push rod (209) through a first rocker arm (212) and a second rocker arm (213); the first sealing member (207) is hinged to the vacuum tube (203) and is also hinged to the second connecting rod (211); the second sealing member (208) is hinged to the vacuum tube (203) and is also hinged to the first connecting rod (210); when the vacuum tube (203) rotates from the first position to the second position, the push rod (209) contacts the machine clamp module (219) and causes the push rod (209) to move in a direction away from the vacuum tube (203).

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