A double-bag feeding mechanism for vacuum packaging and its usage method

Abstract

This invention relates to the field of sealing technology for packaging machines, specifically to a double-bag feeding mechanism for vacuum packaging and its usage method. The mechanism includes a base, on which a transfer machine is rotatably mounted. The transfer machine has a feed port and an outlet port equipped with a pusher and a transfer mechanism, respectively. Multiple sealing assemblies are equidistantly mounted in a ring on the transfer machine. Each sealing assembly includes a box base, a sealing cover, and two sets of clamps. An air extraction assembly for removing excess gas from the packaging bag is located inside the box base, and an exhaust assembly is located on the sealing cover. Thermosetting assemblies are symmetrically arranged inside the box base and the sealing cover. This solution, by incorporating the exhaust and extraction assemblies, inserts the end of a circular tube into the inner edge of the packaging bag. An air pump extracts air from the packaging bag through the circular tube. Simultaneously, the exhaust assembly moves along the surface of the packaging bag, pushing the gas out of the bag, thereby effectively improving the vacuum within the packaging bag and significantly reducing the possibility of food spoilage.

Description

Technical Field

[0001] This invention relates to the field of sealing technology for packaging machines, specifically to a double-bag feeding mechanism for vacuum packaging and its usage method. Background Technology

[0002] Compared to single-bag vacuum packaging machines, double-bag vacuum packaging machines significantly improve production efficiency while reducing the operating speed of the main machine. This results in more stable operation, less wear, and extended lifespan of parts. However, during the vacuuming process, the rapid vacuuming can cause the bag opening to close automatically, leaving some air residue between the inner wall of the bag and the food. This incomplete vacuum can easily lead to food spoilage. Summary of the Invention

[0003] To address the aforementioned shortcomings of existing technologies, this invention provides a double-bag feeding mechanism for vacuum packaging and its usage method, which effectively solves the problem that existing double-bag feeding vacuum packaging machines still have incomplete vacuum extraction of packaging bags.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] This invention provides a double bag feeding mechanism for vacuum packaging, including a base, on which a transfer machine is rotatably mounted. The transfer machine has a feeding port and a discharging port respectively equipped with a pusher and a transfer machine. Multiple sets of sealing components are circumferentially and equidistantly mounted on the transfer machine.

[0006] The sealing assembly includes a box base, a sealing cover, and two sets of clamps. The box base is equipped with a vacuuming component for creating a vacuum inside the packaging bag, and the sealing cover is equipped with an exhaust component for removing excess gas from the packaging bag. The box base and the sealing cover are symmetrically equipped with thermosetting components for sealing the packaging bag.

[0007] The exhaust assembly includes a support base fixedly mounted on a sealing cover, an electric push rod b fixedly mounted on the support base, a connecting seat fixedly mounted on the telescopic end of the electric push rod b, a telescopic rod fixedly mounted between the support base and the connecting seat, two sets of electric push rods c fixedly mounted on the connecting seat, and a pushing assembly provided on one side of the electric push rod c.

[0008] The pushing assembly includes a fixed block fixedly installed at the telescopic end of the electric push rod c. Memory foam is fixedly installed inside the fixed block. A row of push rods a is slidably inserted on one side of the fixed block. Push rods b are provided on both the upper and lower sides of the push rods a. Limiting blocks are fixedly installed at the ends of the push rods a and b. A sliding groove is provided on the push rod b. Two sets of sliding blocks are symmetrically installed on the push rods a, and the ends of the sliding blocks are slidably inserted into the sliding grooves.

[0009] Furthermore, a fixed seat a is fixedly installed on one side of the box base, a rotating shaft is rotatably installed on the fixed seat a, a fixed seat b is fixedly connected to the sealing cover, a fixed shaft is fixedly installed on the fixed seat b, and the same set of connecting parts are fixedly connected to the rotating shaft and the fixed shaft.

[0010] Furthermore, the air extraction assembly includes a fixed box a fixedly installed on the box base, an electric push rod a fixedly installed on the fixed box a, a fixed plate fixedly installed on the telescopic end of the electric push rod a, two sets of air vents symmetrically opened on the fixed plate, and a round tube rotatably installed at the bottom of the air vent, and the round tube rotatably inserted into the bottom of the fixed box a.

[0011] Furthermore, the transfer machine is equipped with an air pump, and an air extraction pipe is fixedly installed through the bottom of the fixed box a through the box base, and the end of the air extraction pipe is fixedly connected to the air pump.

[0012] Furthermore, two sets of guide rods are symmetrically installed at the bottom end of the circular tube, and a threaded groove is opened on the circular tube. A sliding rod is fixedly installed inside the fixed box a and located on one side of the circular tube, and the end of the sliding rod is slidably inserted into the threaded groove.

[0013] Furthermore, a control assembly is provided on the fixed box a. The control assembly includes a fixed box b fixedly installed inside the fixed box a. The fixed box b is filled with liquid. Multiple sets of fixed tubes are fixedly connected to the bottom of the fixed box b. A sliding rod a is slidably inserted into the bottom of the fixed tube, and the end of the sliding rod a is fixedly connected to an electric push rod a. Hollow blocks are fixedly installed on both sides of the fixed box a. A pressure rod is slidably inserted into the hollow block, and the bottom end of the pressure rod is an inclined surface.

[0014] Furthermore, the thermosetting assembly includes a support member fixedly installed on the box base and the sealing cover. A fixing member is fixedly installed on the support member. Two sets of sliding rods b are slidably inserted in the fixing member. A pressure block is fixedly installed at the end of the sliding rod b. An inclined groove is opened in the center of the pressure block. A spring is sleeved on the sliding rod b, and the two ends of the spring are fixedly connected to the pressure block and the fixing member, respectively.

[0015] Furthermore, the sealing cover has two sets of sliding grooves, and two sets of sliders are fixedly installed on one side of the connecting seat, with the ends of the sliders slidably inserted into the sliding grooves.

[0016] The method of using the above-mentioned double bag feeding mechanism for vacuum packaging includes the following steps:

[0017] S1: The flatbed conveyor transports the packaging bags containing food to be sealed into the sealing assembly in sequence. Two packaging bags are placed in each sealing assembly, and the clamps hold the sealing edges on both sides.

[0018] S2: Insert the end of the fixing plate into the opening of the packaging bag, start the air pump, and use the air extraction component to extract air from the packaging bag;

[0019] S3: During the air extraction process of the air extraction component, the electric push rod b controls the pushing component to move from bottom to top along the surface of the packaging bag. With the cooperation of push rod a and push rod b, the excess gas in the packaging bag is further discharged.

[0020] S4: When the pushing component moves to the top of the food inside the packaging bag, the exhaust component stops moving, the fixing plate rises and retracts into the fixing box a, the pressure rod descends, and the pressure rod pushes the pressure blocks on both sides of the suction component to move towards the middle, so that the pressure blocks seal the opening of the packaging bag.

[0021] S5: After the sealing operation is completed, the transfer machine rotates the sealing assembly to one side of the transfer machine, which then removes the packaging bag and transports it to the collection box.

[0022] The technical solution provided by this invention has the following advantages compared with the known prior art:

[0023] This solution incorporates an exhaust component and an extraction component. The end of the round tube is inserted into the inner edge of the packaging bag, and the extraction pump extracts air from the packaging bag through the round tube. Simultaneously, the exhaust component moves along the surface of the packaging bag, pushing the gas inside the bag out, thereby effectively improving the vacuum inside the packaging bag and greatly reducing the possibility of food spoilage. By incorporating a thermosetting component, after extraction is complete, the exhaust component remains pressed against the packaging end, and the thermosetting component heat-seales the portion of the packaging bag above the exhaust component, preventing air from re-entering the packaging bag. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a three-dimensional structural diagram of the internal structure of the sealing assembly of the present invention;

[0027] Figure 3 This is a three-dimensional structural diagram of the internal structure of the air extraction component of the present invention;

[0028] Figure 4 This is a side cross-sectional view of the air extraction assembly of the present invention.

[0029] Figure 5 This is a three-dimensional structural diagram of the thermosetting component and the exhaust component of the present invention;

[0030] Figure 6 This is a side cross-sectional view of the pushing component of the present invention.

[0031] Figure label:

[0032] 1. Base; 101. Horizontal pusher; 102. Transfer machine; 103. Adapter;

[0033] 2. Sealing assembly; 201. Box base; 202. Sealing cover; 203. Fixing seat a; 204. Rotating shaft; 205. Connecting piece; 206. Fixing seat b; 207. Fixing shaft; 208. Clamp;

[0034] 3. Air extraction assembly; 301. Fixing box a; 302. Electric push rod a; 303. Fixing plate; 304. Round tube; 3041. Guide rod; 3042. Threaded groove; 3043. Sliding rod; 305. Air extraction pipe; 306. Fixing box b; 3061. Hollow block; 3062. Pressure rod; 3063. Fixing tube; 3064. Sliding rod a;

[0035] 4. Exhaust assembly; 401. Support base; 4011. Connecting base; 4012. Telescopic rod; 4013. Slider; 402. Electric push rod b; 403. Electric push rod c; 404. Pushing assembly; 4041. Fixing block; 4042. Memory foam; 4043. Push rod a; 4044. Push rod b; 4045. Limiting block; 4046. Slide groove; 4047. Sliding block;

[0036] 5. Thermosetting components; 501. Support components; 502. Fixing components; 503. Slide rod b; 504. Pressure block; 505. Spring; 506. Inclined groove. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] The present invention will be further described below with reference to embodiments.

[0039] Example 1:

[0040] See attached document Figure 1 —Appendix Figure 6As shown, a vacuum packaging double-bag feeding mechanism and its usage method include a base 1, on which a transfer machine 102 is rotatably mounted. The feed port and discharge port of the transfer machine 102 are respectively provided with a pusher 101 and a transfer machine 103. Multiple sets of sealing components 2 are equidistantly installed in a ring on the transfer machine 102. Specifically, the pusher 101 transports the packaging bags containing food to be sealed into the sealing components 2 in sequence. Two packaging bags are placed in each sealing component 2. The sealing components 2 perform vacuum sealing processing on the packaging bags. The transfer machine 102 rotates the sealed components 2 after processing to one side of the transfer machine 103. The transfer machine 103 takes out the packaging bags and transports them to a collection box.

[0041] The sealing assembly 2 includes a box base 201, a sealing cover 202, and two sets of clamps 208. The box base 201 is equipped with a vacuuming assembly 3 for creating a vacuum inside the packaging bag. The sealing cover 202 is equipped with an exhaust assembly 4 for removing excess gas from the packaging bag. The box base 201 and the sealing cover 202 are symmetrically equipped with thermosetting assemblies 5 for sealing the packaging bag. Specifically, the packaging bag is placed in the box base 201 and clamped and fixed by the clamps 208. When the sealing cover 202 is placed back on the box base 201, the vacuuming assembly 3 vacuums the packaging bag, while the exhaust assembly 4 removes excess gas from the packaging bag. After vacuuming is completed, the thermosetting assembly 5 seals the packaging bag.

[0042] A fixed seat a203 is fixedly installed on one side of the box base 201. A rotating shaft 204 is rotatably installed on the fixed seat a203. A motor is installed on the transfer machine 102 and located on one side of the box base 201. The motor is used to drive the rotating shaft 204 to rotate. A fixed seat b206 is fixedly connected to the sealing cover 202. A fixed shaft 207 is fixedly installed on the fixed seat b206. The same set of connecting parts 205 are fixedly connected to the rotating shaft 204 and the fixed shaft 207. Specifically, the motor controls the rotation of the rotating shaft 204, and then drives the fixed shaft 207 to rotate along the axis center of the rotating shaft 204 through the connecting parts 205, thereby achieving the purpose of controlling the opening and closing of the sealing cover 202 and the box base 201.

[0043] Example 2:

[0044] See attached document Figure 2 —Appendix Figure 4As shown, the air extraction assembly 3 includes a fixed box a301 fixedly installed on the box base 201. An electric push rod a302 is fixedly installed on the fixed box a301. The electric push rod a302 is used to simultaneously control the lifting and lowering of two sets of circular tubes 304. A fixed plate 303 is fixedly installed on the telescopic end of the electric push rod a302. The fixed plate 303 drives the two sets of circular tubes 304 to move up and down. Two sets of air vents are symmetrically opened on the fixed plate 303. A circular tube 304 is rotatably installed at the bottom of the air vent, and the circular tube 304 is rotatably inserted into the bottom of the fixed box a301. To facilitate the connection of the air pump to the packaging bag and to extract air from the packaging bag, the transfer machine 102 is equipped with an air pump. The air pump is used to extract air from the packaging bag. The bottom of the fixed box a301 is fixedly installed through the box base 201 with an air extraction pipe 305, and the end of the air extraction pipe 305 is fixedly connected to the air pump. Specifically, the electric push rod a302 pushes the round pipe 304 down through the fixed plate 303, so that the round pipe 304 extends into the opening of the packaging bag, and the air pump is started. The air pump extracts air from the fixed box a301, and the gas in the packaging bag is extracted by the air pump through the vent.

[0045] Two sets of guide rods 3041 are symmetrically installed at the bottom of the round tube 304. When the clamp 208 clamps the packaging bag, the packaging bag opening may be closed, and the round tube 304 cannot be directly inserted into the packaging bag. Therefore, the guide rods 3041 are set. When the packaging bag is placed on the box base 201, the end of the guide rod 3041 will be inserted into the edge of the packaging bag, so that the packaging bag is open, making it easy for the round tube 304 to be inserted. The round tube 304 has a threaded groove 3042. A sliding rod 3043 is fixedly installed in the fixed box a301 and located on one side of the round tube 304. The end of the sliding rod 3043 is slidably inserted into the threaded groove 3042. By setting the threaded groove 3042 and the sliding rod 3043, during the process of the round tube 304 descending, the sliding rod 3043 will push the round tube 304 to rotate along the threaded groove 3042, thereby causing the two sets of guide rods 3041 to rotate at the same time, so as to achieve the purpose of opening the packaging bag opening.

[0046] Example 3:

[0047] See attached document Figure 2 Appendix Figure 5 —Appendix Figure 6As shown, the exhaust assembly 4 includes a support base 401 fixedly mounted on the sealing cover 202. The support base 401 is used to fix the electric push rod b402 to the sealing cover 202. The electric push rod b402 is fixedly mounted on the support base 401 and is used to control the lifting and lowering of the pressing assembly 404. A connecting seat 4011 is fixedly mounted on the telescopic end of the electric push rod b402. The connecting seat 4011 is used to support two sets of pressing assemblies 404. A telescopic rod 4012 is fixedly mounted between the support base 401 and the connecting seat 4011. By setting the telescopic rod 4012, it helps to maintain the balance of the connecting seat 4011 during long-term lifting and lowering reciprocating processes. Two sets of sliding grooves are provided on the sealing cover 202. Two sets of sliders 4013 are fixedly installed on one side of the connecting seat 4011, and the ends of the sliders 4013 are slidably inserted into the sliding grooves. By setting the sliders 4013 and the sliding grooves, the connecting seat 4011 can also be in close contact with the inner wall of the sealing cover 202 during the sliding process, so as to avoid the deformation of the telescopic ends of the electric push rod b402 and the telescopic rod 4012 due to long-term vertical gravity. Two sets of electric push rods c403 are fixedly installed on the connecting seat 4011. The electric push rods c403 are used to push the pushing component 404 close to the packaging bag. The pushing component 404 is provided on one side of the electric push rod c403.

[0048] The pushing assembly 404 includes a fixing block 4041 fixedly installed on the telescopic end of the electric push rod c403. A memory foam 4042 is fixedly installed inside the fixing block 4041. The memory foam 4042 is used to push the push rods a4043 and b4044 back to their original positions. A row of push rods a4043 is slidably inserted into one side of the fixing block 4041. Push rods b4044 are provided on both the upper and lower sides of the push rods a4043. Both push rods a4043 and b4044 are used to push air out of the packaging bag. Limiting blocks 4045 are fixedly installed at the ends of both push rod b4044 and push rod b4044. By setting the limiting blocks 4045, push rod a4043 is prevented from sliding out of the fixed block 4041. Push rod b4044 is provided with a sliding groove 4046. Two sets of sliding blocks 4047 are symmetrically installed on push rod a4043, and the ends of sliding blocks 4047 are slidably inserted into the sliding groove 4046. By setting the sliding groove 4046 and sliding blocks 4047, push rod a4043 is prevented from sliding out between the upper and lower sets of sliding blocks 4047.

[0049] Working principle: When the vacuum assembly 3 starts to vacuum the packaging bag, the electric push rod b402 controls the two sets of pushing assemblies 404 to move from bottom to top along the surface of the packaging bag. The electric push rod c403 pushes the pushing assembly 404 to come close to the packaging bag. The pushing rods a4043 and b4044 move close to the surface of the packaging bag, and the pushing rods a4043 and b4044 expel the excess gas in the packaging bag, so that the packaging bag is in close contact with the food surface.

[0050] Example 4:

[0051] See attached document Figure 2 Appendix Figure 4 —Appendix Figure 5 As shown, a control assembly is provided on the fixed box a301. The control assembly includes a fixed box b306 fixedly installed inside the fixed box a301. The fixed box b306 is filled with liquid, and the flowing liquid can control the raising and lowering of the slide rod a3064. Multiple sets of fixed tubes 3063 are fixedly connected to the bottom of the fixed box b306. The fixed tubes 3063 are used to limit the sliding range of the slide rod a3064. The slide rod a3064 is slidably inserted into the bottom of the fixed tubes 3063, and the end of the slide rod a3064 is fixedly connected to the electric push rod a302. The slide rod a3064 is used to control the flow of liquid in the fixed box b306. Hollow blocks 3061 are fixedly installed on both sides of the fixed box a301. The fixed box b306 is connected to the hollow blocks 3061. A pressure rod 3062 is slidably inserted into the hollow block 3061. The bottom end of the pressure rod 3062 is inclined and is used to push the pressure block 504.

[0052] The thermosetting assembly 5 includes a support member 501 fixedly installed on the box base 201 and the sealing cover 202. The support member 501 supports the fixing member 502. The fixing member 502 is fixedly installed on the support member 501. The fixing member 502 restricts the sliding range of two sets of sliding rods b503. Two sets of sliding rods b503 are slidably inserted into the fixing member 502. The sliding rods b503 support the horizontal movement of the pressure block 504. The pressure block 504 is fixedly installed at the end of the sliding rod b503. The pressure blocks 504 moving in opposite directions clamp the packaging bag and heat-seal it. The pressure block 504 has a sloping groove 506 in the center. By setting the sloping groove 506, it is convenient for the pressure rod 3062 to be inserted between the pressure block 504 and the fixing member 502 to push the pressure block 504. A spring 505 is sleeved on the sliding rod b503. The two ends of the spring 505 are fixedly connected to the pressure block 504 and the fixing member 502 respectively. The spring 505 is used to pull the pressure block 504 to reset.

[0053] Working principle: When the air extraction component 3 finishes extraction, the electric push rod a302 drives the fixed plate 303 to rise. The fixed plate 303 pushes the slide rod a3064 to rise. The slide rod a3064 pushes the liquid to the fixed boxes a301 on both sides, which in turn causes the liquid to push the pressure rod 3062 down until it pushes the pressure block 504 to move horizontally. The two sets of pressure blocks 504 move towards each other, clamping the packaging bag and heat-sealing it.

[0054] Example 5:

[0055] The method of using the above-mentioned double bag feeding mechanism for vacuum packaging includes the following steps:

[0056] S1: The flatbed machine 101 transports the packaging bags containing food to be sealed into the sealing assembly 2 in sequence. Two packaging bags are placed in each sealing assembly 2, and the clamp 208 clamps the sealing edges on both sides.

[0057] S2: The end of the fixing plate 303 is inserted into the opening of the packaging bag, the air pump is started, and the air pumping component 3 is used to extract air from the packaging bag;

[0058] S3: During the air extraction process of the air extraction component 3, the electric push rod b402 controls the pushing component 404 to move from bottom to top along the surface of the packaging bag. With the cooperation of the push rod a4043 and the push rod b4044, the excess gas in the packaging bag is further discharged.

[0059] S4: When the pushing component 404 moves to the top of the food inside the packaging bag, the exhaust component 4 stops moving, the fixing plate 303 rises and retracts into the fixing box a301, the pressure rod 3062 descends, and the pressure rod 3062 pushes the pressure blocks 504 on both sides of the suction component 3 to move towards the middle, so that the pressure blocks 504 seal the opening of the packaging bag.

[0060] S5: After the sealing operation is completed, the transfer machine 102 rotates the sealing assembly 2 to the side of the transfer machine 103, and the transfer machine 103 removes the packaging bag and transports it to the collection box.

[0061] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A double-bag feeding mechanism for vacuum packaging, comprising a base (1), characterized in that, A transfer machine (102) is rotatably mounted on the base (1). The feed port and discharge port of the transfer machine (102) are respectively equipped with a flat pusher (101) and a transfer machine (103). Multiple sets of sealing components (2) are installed in a ring at equal intervals on the transfer machine (102). The sealing assembly (2) includes a box base (201), a sealing cover (202) and two sets of clamps (208). The box base (201) is provided with a vacuum assembly (3) for drawing the inside of the packaging bag into a vacuum state. The sealing cover (202) is provided with an exhaust assembly (4) for removing excess gas from the packaging bag. The box base (201) and the sealing cover (202) are symmetrically provided with thermosetting assemblies (5) for sealing the packaging bag. The exhaust assembly (4) includes a support base (401) fixedly installed on the sealing cover (202), an electric push rod b (402) fixedly installed on the support base (401), a connecting seat (4011) fixedly installed at the telescopic end of the electric push rod b (402), a telescopic rod (4012) fixedly installed between the support base (401) and the connecting seat (4011), two sets of electric push rods c (403) fixedly installed on the connecting seat (4011), and a pushing assembly (404) provided on one side of the electric push rod c (403). The pushing assembly (404) includes a fixed block (4041) fixedly installed at the telescopic end of the electric push rod c (403). Memory foam (4042) is fixedly installed inside the fixed block (4041). A row of push rods a (4043) is slidably inserted on one side of the fixed block (4041). Push rods b (4044) are provided on both the upper and lower sides of the push rods a (4043). Limiting blocks (4045) are fixedly installed at the ends of the push rods a (4043) and push rods b (4044). A sliding groove (4046) is provided on the push rod b (4044). Two sets of sliding blocks (4047) are symmetrically installed on the push rods a (4043), and the ends of the sliding blocks (4047) are slidably inserted into the sliding grooves (4046).

2. The double-bag feeding mechanism for vacuum packaging according to claim 1, characterized in that, A fixed seat a (203) is fixedly installed on one side of the box base (201). A rotating shaft (204) is rotatably installed on the fixed seat a (203). A fixed seat b (206) is fixedly connected to the sealing cover (202). A fixed shaft (207) is fixedly installed on the fixed seat b (206). The same set of connecting parts (205) is fixedly connected to the rotating shaft (204) and the fixed shaft (207).

3. The double-bag feeding mechanism for vacuum packaging according to claim 2, characterized in that, The air extraction assembly (3) includes a fixed box a (301) fixedly installed on a box base (201). An electric push rod a (302) is fixedly installed on the fixed box a (301). A fixed plate (303) is fixedly installed on the telescopic end of the electric push rod a (302). Two sets of air vents are symmetrically opened on the fixed plate (303). A round tube (304) is rotatably installed at the bottom of the air vent, and the round tube (304) is rotatably inserted into the bottom of the fixed box a (301).

4. The double-bag feeding mechanism for vacuum packaging according to claim 3, characterized in that, The transfer machine (102) is equipped with an air pump. The bottom of the fixed box a (301) is fixedly installed with an air extraction pipe (305) through the box base (201), and the end of the air extraction pipe (305) is fixedly connected to the air pump.

5. The double-bag feeding mechanism for vacuum packaging according to claim 4, characterized in that, Two sets of guide rods (3041) are symmetrically installed at the bottom end of the round tube (304). A threaded groove (3042) is opened on the round tube (304). A sliding rod (3043) is fixedly installed in the fixed box a (301) and located on one side of the round tube (304), and the end of the sliding rod (3043) is slidably inserted into the threaded groove (3042).

6. The double-bag feeding mechanism for vacuum packaging according to claim 5, characterized in that, The fixed box a (301) is provided with a control assembly. The control assembly includes a fixed box b (306) fixedly installed inside the fixed box a (301). The fixed box b (306) is filled with liquid. The bottom of the fixed box b (306) is fixedly connected to multiple sets of fixed tubes (3063). The bottom of the fixed tubes (3063) is slidably inserted with a slide rod a (3064), and the end of the slide rod a (3064) is fixedly connected to an electric push rod a (302). Hollow blocks (3061) are fixedly installed on both sides of the fixed box a (301). A pressure rod (3062) is slidably inserted inside the hollow block (3061). The bottom end of the pressure rod (3062) is an inclined surface.

7. The double-bag feeding mechanism for vacuum packaging according to claim 6, characterized in that, The thermosetting assembly (5) includes a support member (501) fixedly installed on the box base (201) and the sealing cover (202). A fixing member (502) is fixedly installed on the support member (501). Two sets of sliding rods b (503) are slidably inserted in the fixing member (502). A pressure block (504) is fixedly installed at the end of the sliding rod b (503). A sloping groove (506) is opened in the center of the pressure block (504). A spring (505) is sleeved on the sliding rod b (503), and the two ends of the spring (505) are fixedly connected to the pressure block (504) and the fixing member (502) respectively.

8. The double-bag feeding mechanism for vacuum packaging according to claim 7, characterized in that, The sealing cover (202) has two sets of sliding grooves, and two sets of sliders (4013) are fixedly installed on one side of the connecting seat (4011), and the ends of the sliders (4013) are slidably inserted into the sliding grooves.

9. A method of using the double-bag feeding mechanism for vacuum packaging as described in claim 8, characterized in that, Includes the following steps: S1: The flatbed machine (101) transports the packaging bags containing food to be sealed into the sealing assembly (2) in sequence. Two packaging bags are placed in each sealing assembly (2), and the clamp (208) clamps the sealing edges on both sides. S2: The end of the fixing plate (303) is inserted into the opening of the packaging bag, the air pump is started, and the air is extracted from the packaging bag through the air extraction component (3); S3: During the process of the suction assembly (3) suctioning air, the electric push rod b (402) controls the push assembly (404) to move from bottom to top along the surface of the packaging bag. With the cooperation of push rod a (4043) and push rod b (4044), the excess gas in the packaging bag is further discharged. S4: When the pushing component (404) moves to the top of the food inside the packaging bag, the exhaust component (4) stops moving, the fixing plate (303) rises and retracts into the fixing box a (301), the pressure rod (3062) descends, and the pressure rod (3062) pushes the pressure blocks (504) on both sides of the suction component (3) to move towards the middle, so that the pressure blocks (504) seal the opening of the packaging bag; S5: After the sealing operation is completed, the transfer machine (102) rotates the sealing assembly (2) to the side of the transfer machine (103), and the transfer machine (103) takes out the packaging bag and transports it to the collection box.

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