Vacuum inflation heat sealing device for food packaging

Abstract

The utility model relates to the technical field of food packaging, in particular to a vacuum inflation heat sealing device for food packaging, which can move a food packaging bag towards a heat sealing strip to adjust the position of the packaging bag, the position of the heat sealing strip is more accurate, and the working efficiency is high. Comprising a sliding rail frame and a feeding table, and the feeding table is installed on the sliding rail frame in a sliding mode; the two ends of the lower roller are rotationally installed on the rack through rotating shafts, the convex strips are arranged on the side face of the lower roller, grooves are formed in the tops of the convex strips, heat sealing strips are arranged in the grooves, the two ends of the upper roller are rotationally installed on the rack through shaft rods, the upper roller is located above the lower roller, and a gap is formed between the upper roller and the lower roller; the pressing strip is installed on the side wall of the upper roller, the pressing strip is matched with the groove of the protruding strip, and the pressing strip and the protruding strip are oppositely arranged.

Description

Technical Field

[0001] The utility model relates to the technical field of food packaging, in particular to a vacuum inflation heat sealing device for food packaging. Background Art

[0002] When packaging food, a vacuum inflation food packaging machine is often used. The vacuum inflation food packaging machine evacuates the air in the food packaging bag and then fills it with nitrogen, carbon dioxide or other modulated gases, and finally seals the food packaging bag. The Chinese utility model patent with the publication number of CN221091521U in the prior art proposes a vacuum inflation heat sealing device. By setting a second threaded column and a threaded sleeve, when people need to seal the bag of materials, they only need to operate the second motor through the control switch, so as to drive the second threaded column to rotate. Under the cooperation of the second threaded column and the threaded sleeve, the heating component can move downward, so as to realize the sealing of the materials. Through the coordinated use of a vacuum pump, an air outlet pipe and a hose, the materials are vacuum-treated.

[0003] However, the above heat sealing device cannot adjust the position of the packaging bag. When heat sealing, the position of the packaging bag needs to be adjusted manually, the position of the heat seal is not accurate enough, and the working efficiency is low. Summary of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a vacuum inflation heat sealing device for food packaging, which can move the food packaging bag towards the heat seal strip to adjust the position of the packaging bag, the position of the heat seal is more accurate, and the working efficiency is high.

[0005] A vacuum inflation heat-sealing device for food packaging of the utility model includes a slide rail frame and a feeding table, and the feeding table is slidably installed on the slide rail frame; it also includes a machine frame, a lower roller, a convex strip, an upper roller and a pressing strip. Both ends of the lower roller are rotatably installed on the machine frame through a rotating shaft. A convex strip is arranged on the side surface of the lower roller, and a groove is arranged on the top of the convex strip. A heat-sealing strip is arranged in the groove. Both ends of the upper roller are rotatably installed on the machine frame through a shaft rod. The upper roller is located above the lower roller, and a gap is arranged between the upper roller and the lower roller. The pressing strip is installed on the side wall of the upper roller, and the pressing strip matches the groove of the convex strip, and the pressing strip and the convex strip are arranged oppositely. During operation, the packaging bag is placed on the feeding table, and the port of the packaging bag is aligned between the lower roller and the upper roller. The lower roller and the upper roller rotate relatively synchronously. At the same time, the feeding table moves along the slide rail frame towards the lower roller and the upper roller, so that the port of the packaging bag is frictionally conveyed backward by the lower roller and the upper roller. During the conveying process of the port of the packaging bag, the heat-sealing strip in the groove of the convex strip is heated. When the pressing strip is inserted into the groove of the convex strip, the pressing strip presses the port of the packaging bag tightly on the heat-sealing strip of the convex strip for sealing. After the sealing is completed, the lower roller and the upper roller rotate reversely synchronously. At the same time, the feeding table retreats along the slide rail frame, and the food packaging bag after sealing is sent out between the lower roller and the upper roller. Compared with the prior art, it can move the food packaging bag towards the heat-sealing strip, does not require manual adjustment of the position of the packaging bag, the position of the heat seal is more accurate, and the working efficiency is high.

[0006] Preferably, it further includes a plurality of springs. Slots are arranged on the side wall of the upper roller, and the pressing strip is slidably inserted into the slots of the upper roller. One end of each of the plurality of springs is connected to the pressing strip, and the plurality of springs are connected to the slots of the upper roller. After the pressing strip is inserted into the groove of the convex strip, the plurality of springs are compressed, so that the pressing force between the pressing strip and the heat-sealing strip on the convex strip is stable, and the heat-sealing effect is improved.

[0007] Preferably, it further includes two vertical chutes and two nuts. Two vertical chutes are arranged on the machine frame. The shaft rods at both ends of the upper roller respectively pass through the two vertical chutes, and the two nuts are respectively rotatably screwed on the shaft rods at both ends of the upper roller. The two nuts lock the upper roller on the machine frame. Adjust the positions of the shaft rods at both ends of the upper roller along the two vertical chutes, so as to adjust the gap between the upper roller and the lower roller. Tighten the two nuts to lock the upper roller on the machine frame, so as to be applicable to packaging bags of different thicknesses, and the versatility is good.

[0008] Preferably, it further includes two first sliders, two first rotating shafts, two second sliders, two second shafts, two arm plates and two pull rods. The two first sliders and the two second sliders are slidably mounted on the slide rail frame. The middle sides of both sides of the feeding table are provided with first rotating shafts, and the two first rotating shafts are respectively rotatably connected to the two first sliders. Arc-shaped grooves are provided on the two second sliders. The two ends of the feeding table away from the machine frame are provided with second shafts, and the two second shafts are respectively slidably inserted into the arc-shaped grooves of the two second sliders. One ends of the two arm plates are respectively connected to the rotating shafts at both ends of the lower roller, and the other ends of the two arm plates are respectively rotatably connected to one ends of the two pull rods. The other ends of the two pull rods are respectively rotatably connected to both sides of the end of the feeding table facing the machine frame. When the lower roller rotates to make the pressing strip and the protruding strip approach and align, the arm plate pulls the feeding table towards the machine frame through the pull rod, so that the feeding table drives the two first sliders and the two second sliders to move along the slide rail frame through the two first rotating shafts and the two second shafts, so that the port of the packaging bag on the feeding table extends into the lower roller and the protruding strip. After the sealing is completed, when the lower roller rotates in the reverse direction to separate the pressing strip and the protruding strip, the arm plate pushes the feeding table out through the pull rod, so that the port of the packaging bag is separated from the lower roller and the upper roller. When the feeding table is pushed out to the limit, the lower roller continues to rotate in the reverse direction, so that the arm plate pulls the end of the feeding table facing the machine frame downward through the pull rod, so that the feeding table rotates around the two first rotating shafts, and the two second shafts move upward in the arc-shaped grooves of the two second sliders, so that the feeding table tilts, so that the packaging bag slides out of the feeding table, realizing automatic discharging and improving work efficiency.

[0009] Preferably, it further includes a first switch, an electromagnetic pin, a second switch and a third switch. The first switch and the electromagnetic pin are installed on the slide rail frame, and the first switch and the electromagnetic pin are electrically connected. When the feeding table moves to the end of the slide rail frame away from the machine frame, the first switch aligns with the first slider, and the piston rod of the electromagnetic pin locks the first slider. The second switch and the third switch are installed on the second slider. The second switch aligns with the bottom of the arc-shaped groove of the second slider, and the third switch aligns with the top of the arc-shaped groove of the second slider. When the feeding table moves to the end of the slide rail frame away from the machine frame, the first switch aligns with the first slider to generate an electrical signal. After the electromagnetic pin receives the above electrical signal, the piston rod extends to lock the first slider. At this time, the lower roller continues to rotate in the reverse direction, so that the feeding table rotates around the first rotating shaft, making the first slider more stable when the feeding table rotates. When the second switch aligns with the second shaft, the second switch generates an electrical signal. At this time, the device judges that the feeding table is leveled. When the third switch aligns with the second shaft, the third switch generates an electrical signal. At this time, the device judges that the feeding table is tilted. At this time, the lower roller starts to rotate forward, improving the degree of automation.

[0010] Preferably, it further includes a lower pipe rack and a plurality of cold air pipes. The lower pipe rack is installed on the lower end surface of the end of the feeding table facing the machine frame, and the plurality of cold air pipes are installed on the lower pipe rack. The output ends of the plurality of cold air pipes face the protruding strip; the plurality of cold air pipes are connected to the external cold air pipes, so that the plurality of cold air pipes blow cold air to cool the heat sealing strip in the groove of the protruding strip.

[0011] Preferably, it further includes two front baffles, a cross bar and a rear baffle. The two front baffles are oppositely installed on the left and right sides of one end of the feeding table facing the machine frame. The cross bar is movably installed on the end of the feeding table away from the machine frame. The rear baffle is installed on one end of the cross bar and is located on the feeding table. The cross bar and the rear baffle position one end of the packaging bag, and the two front baffles limit and position the left and right sides of the port of the packaging bag, improving the accuracy of the packaging bag on the feeding table.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: it can move the food packaging bag towards the heat seal strip, without the need to manually adjust the position of the packaging bag, the position of the heat seal is more accurate, and the working efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is an axonometric structural diagram of the present utility model;

[0015] Figure 3 is a schematic side view structural diagram of the present utility model;

[0016] Figure 4 is a schematic structural diagram of structures such as the feeding table, the lower pipe rack and the cold air pipe;

[0017] Figure 5 is a schematic structural diagram of structures such as the lower roller, the convex strip, the upper roller, the pressing strip and the spring.

[0018] Reference numerals in the drawings: 1, slide rail frame; 2, feeding table; 3, machine frame; 4, lower roller; 5, convex strip; 6, upper roller; 7, pressing strip; 8, spring; 9, vertical chute; 10, nut; 11, slider one; 12, rotating shaft one; 13, slider two; 14, shaft rod two; 15, arm plate; 16, pull rod; 17, switch one; 18, electromagnetic pin; 19, switch two; 20, switch three; 21, lower pipe rack; 22, cold air pipe; 23, front baffle; 24, cross bar; 25, rear baffle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present utility model is more thorough and comprehensive. Embodiment 1

[0020] As Figures 1 to 5As shown in the figure, a vacuum inflation heat-sealing device for food packaging includes a slide rail frame 1 and a feeding table 2. The feeding table 2 is slidably installed on the slide rail frame 1. It also includes a machine frame 3, a lower roller 4, a rib 5, an upper roller 6 and a pressing strip 7. The two ends of the lower roller 4 are rotatably installed on the machine frame 3 through a rotating shaft. A rib 5 is arranged on the side surface of the lower roller 4. A groove is arranged at the top of the rib 5, and a heat-sealing strip is arranged in the groove. The two ends of the upper roller 6 are rotatably installed on the machine frame 3 through a shaft rod. The upper roller 6 is located above the lower roller 4. A gap is provided between the upper roller 6 and the lower roller 4. The pressing strip 7 is installed on the side wall of the upper roller 6. The pressing strip 7 matches the groove of the rib 5, and the pressing strip 7 and the rib 5 are arranged oppositely. It also includes a plurality of springs 8. A slot is arranged on the side wall of the upper roller 6. The pressing strip 7 is slidably inserted into the slot of the upper roller 6. One end of each of the plurality of springs 8 is connected to the pressing strip 7, and the plurality of springs 8 are connected to the slot of the upper roller 6. It also includes two vertical sliding grooves 9 and two nuts 10. Two vertical sliding grooves 9 are arranged on the machine frame 3. The shaft rods at both ends of the upper roller 6 respectively pass through the two vertical sliding grooves 9. The two nuts 10 are respectively rotatably screwed on the shaft rods at both ends of the upper roller 6, and the two nuts 10 lock the upper roller 6 on the machine frame 3. It also includes a lower pipe rack 21 and a plurality of cold air pipes 22. The lower pipe rack 21 is installed on the lower end surface of one end of the feeding table 2 facing the machine frame 3. The plurality of cold air pipes 22 are installed on the lower pipe rack 21, and the output ends of the plurality of cold air pipes 22 face the rib 5. It also includes two front baffle plates 23, a cross bar 24 and a rear baffle plate 25. The two front baffle plates 23 are relatively installed on the left and right sides of one end of the feeding table 2 facing the machine frame 3. The cross bar 24 is movably installed on one end of the feeding table 2 away from the machine frame 3. The rear baffle plate 25 is installed on one end of the cross bar 24, and the rear baffle plate 25 is located on the feeding table 2.

[0021] During operation, adjust the positions of the axle rods at both ends of the upper roller 6 along the two vertical sliding grooves 9, so as to adjust the gap between the upper roller 6 and the lower roller 4. Tighten the two nuts 10 to lock the upper roller 6 on the frame 3, so as to be applicable to packaging bags of different thicknesses. Place the packaging bag on the feeding table 2. The cross bar 24 and the rear baffle 25 position one end of the packaging bag, and the two front baffles 23 limit and position the left and right sides of the port of the packaging bag, improving the accuracy of the packaging bag on the feeding table 2. Align the port of the packaging bag between the lower roller 4 and the upper roller 6. The lower roller 4 and the upper roller 6 rotate relatively synchronously. At the same time, the feeding table 2 moves along the slide rail frame 1 towards the lower roller 4 and the upper roller 6, so that the port of the packaging bag is frictionally conveyed backward by the lower roller 4 and the upper roller 6. During the conveying of the port of the packaging bag, the heat sealing strip in the groove of the convex strip 5 is heated. When the pressing strip 7 is inserted into the groove of the convex strip 5, the pressing strip 7 presses the port of the packaging bag tightly on the heat sealing strip of the convex strip 5 for sealing. After the pressing strip 7 is inserted into the groove of the convex strip 5, a plurality of springs 8 are compressed, so that the pressing force between the pressing strip 7 and the heat sealing strip on the convex strip 5 is stable. After the sealing is completed, the lower roller 4 and the upper roller 6 rotate reversely synchronously. A plurality of cold air pipes 22 are connected to an external cold air pipe, so that the plurality of cold air pipes 22 blow cold air to cool the heat sealing strip in the groove of the convex strip 5. At the same time, the feeding table 2 retreats along the slide rail frame 1, and the food packaging bag after sealing is sent out between the lower roller 4 and the upper roller 6. Compared with the prior art, it can move the food packaging bag towards the heat sealing strip, does not require manual adjustment of the position of the packaging bag, the position of heat sealing is more accurate, and the working efficiency is high. Embodiment 2

[0022] As Figures 1 to 3As shown in the figure, on the basis of Embodiment 1, it further includes two first sliders 11, two first rotating shafts 12, two second sliders 13, two second shaft rods 14, two arm plates 15 and two pull rods 16. The two first sliders 11 and the two second sliders 13 are slidably installed on the slide rail frame 1. On both sides of the middle of the feeding table 2, first rotating shafts 12 are provided. The two first rotating shafts 12 are respectively rotatably connected to the two first sliders 11. Arc-shaped grooves are provided on the two second sliders 13. On both sides of one end of the feeding table 2 away from the machine frame 3, second shaft rods 14 are provided. The two second shaft rods 14 are respectively slidably inserted into the arc-shaped grooves of the two second sliders 13. One ends of the two arm plates 15 are respectively connected to the rotating shafts at both ends of the lower roller 4, and the other ends of the two arm plates 15 are respectively rotatably connected to one ends of the two pull rods 16. The other ends of the two pull rods 16 are respectively rotatably connected to both sides of one end of the feeding table 2 facing the machine frame 3. It further includes a first switch 17, an electromagnetic pin 18, a second switch 19 and a third switch 20. The first switch 17 and the electromagnetic pin 18 are installed on the slide rail frame 1. The first switch 17 and the electromagnetic pin 18 are electrically connected. When the feeding table 2 moves to one end of the slide rail frame 1 away from the machine frame 3, the first switch 17 is aligned with the first slider 11, and the piston rod of the electromagnetic pin 18 locks the first slider 11. The second switch 19 and the third switch 20 are installed on the second slider 13. The second switch 19 is aligned with the bottom of the arc-shaped groove of the second slider 13, and the third switch 20 is aligned with the top of the arc-shaped groove of the second slider 13.

[0023] When the lower roller 4 rotates to make the pressing strip 7 and the convex strip 5 approach and align, the arm plate 15 pulls the feeding table 2 towards the machine frame 3 through the pull rod 16, so that the feeding table 2 drives the two first sliders 11 and the two second sliders 13 to move along the slide rail frame 1 through the two first rotating shafts 12 and the two second shaft rods 14, so that the port of the packaging bag on the feeding table 2 extends into the lower roller 4 and the convex strip 5. After the sealing is completed, when the lower roller 4 rotates in the reverse direction to separate the pressing strip 7 and the convex strip 5, the arm plate 15 pushes the feeding table 2 out through the pull rod 16, so that the port of the packaging bag is separated from the lower roller 4 and the upper roller 6. When the feeding table 2 is pushed out to the limit, the first switch 17 is aligned with the first slider 11 to generate an electrical signal. After the electromagnetic pin 18 receives the above electrical signal, the piston rod extends to lock the first slider 11. The lower roller 4 continues to rotate in the reverse direction, so that the arm plate 15 pulls the end of the feeding table 2 facing the machine frame 3 downward through the pull rod 16, so that the feeding table 2 rotates around the two first rotating shafts 12, and the two second shaft rods 14 move upward in the arc-shaped grooves of the two second sliders 13, so that the feeding table 2 tilts, so that the packaging bag slides out of the feeding table 2 to realize automatic discharging. At this time, the third switch 20 is aligned with the second shaft rod 14, so that the third switch 20 generates an electrical signal. At this time, the device judges that the feeding table 2 is tilted. At this time, the lower roller 4 starts to rotate forward. When the second switch 19 is aligned with the second shaft rod 14, the second switch 19 generates an electrical signal. At this time, the device judges that the feeding table 2 is leveled, and the lower roller 4 stops rotating to prepare for the next sealing of the packaging bag.

[0024] As Figures 1 to 5As shown in the figure, a vacuum inflation heat sealing device for food packaging of the present utility model, when working, first places the packaging bag on the feeding table 2. The two front baffles 23 and the rear baffle 25 position the packaging bag so that the port of the packaging bag is aligned between the lower roller 4 and the upper roller 6. Then, the lower roller 4 and the upper roller 6 rotate relatively synchronously. The arm plate 15 and the pull rod 16 move the feeding table 2 along the slide rail frame 1 towards the lower roller 4 and the upper roller 6, so that the port of the packaging bag is frictionally conveyed backward by the lower roller 4 and the upper roller 6. During the conveying process of the port of the packaging bag, the heat sealing strip in the groove of the rib 5 is heated. When the pressing strip 7 is inserted into the groove of the rib 5, the pressing strip 7 presses the port of the packaging bag tightly on the heat sealing strip of the rib 5 for sealing. Then, after the sealing is completed, the lower roller 4 and the upper roller 6 rotate reversely synchronously. The arm plate 15 and the pull rod 16 move the feeding table 2 backward along the slide rail frame 1, and send out the food packaging bag after sealing from between the lower roller 4 and the upper roller 6. When the feeding table 2 moves to one end of the slide rail frame 1 away from the machine frame 3, the switch one 17 aligns with the slider one 11 to generate an electrical signal. After receiving the above electrical signal, the electromagnetic pin 18 extends the piston rod to lock the slider one 11. At this time, the lower roller 4 continues to rotate reversely, so that the arm plate 15 pulls the feeding table 2 downward towards the end of the machine frame 3 through the pull rod 16, so that the feeding table 2 rotates around the two rotating shafts one 12. The two shaft rods two 14 move upward in the arc grooves of the two sliders two 13, so that the feeding table 2 tilts, so that the packaging bag slides out of the feeding table 2 to achieve automatic discharging. Finally, when the switch three 20 aligns with the shaft rod two 14, the switch three 20 generates an electrical signal. At this time, the device judges that the feeding table 2 is tilted. At this time, the lower roller 4 starts to rotate forward. When the switch two 19 aligns with the shaft rod two 14, the switch two 19 generates an electrical signal. At this time, the device judges that the feeding table 2 is leveled, and the lower roller 4 stops rotating.

[0025] The main functions achieved by the present utility model are:

[0026] 1. It can move the food packaging bag towards the heat sealing strip to adjust the position of the packaging bag, the position of the heat seal is more accurate, and the working efficiency is high;

[0027] 2. It can be applicable to packaging bags of different thicknesses, with good versatility;

[0028] 3. It can automatically discharge materials, improving the working efficiency.

[0029] A vacuum inflation heat sealing device for food packaging of the present utility model has an installation method, a connection method or a setting method that are all common mechanical methods, and any implementation that can achieve its beneficial effects can be carried out; the slide rail frame 1, the feeding table 2, the lower roller 4, the heat sealing strip, the upper roller 6, the pressing strip 7, the spring 8, the nut 10, the first slider 11, the first rotating shaft 12, the second slider 13, the second shaft rod 14, the first switch 17, the electromagnetic pin 18, the second switch 19, the third switch 20, and the cold air pipe 22 of a vacuum inflation heat sealing device for food packaging of the present utility model are purchased on the market, and those skilled in the art only need to install and operate according to the attached operation manual, without the need for those skilled in the art to perform creative labor.

[0030] All technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0031] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the technical field, without departing from the technical principle of the present utility model, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A vacuum inflation heat sealing device for food packaging, comprising a slide rail frame (1) and a feeding table (2), wherein the feeding table (2) is slidably mounted on the slide rail frame (1); characterized in that: The invention also comprises a frame (3), a lower roller (4), a convex strip (5), an upper roller (6) and a pressure strip (7), wherein the two ends of the lower roller (4) are rotatably mounted on the frame (3) via a rotating shaft, a convex strip (5) is arranged on the side of the lower roller (4), a groove is arranged on the top of the convex strip (5), and a heat sealing strip is arranged in the groove, and the two ends of the upper roller (6) are rotatably mounted on the frame (3) via a shaft, the upper roller (6) is located above the lower roller (4), a gap is arranged between the upper roller (6) and the lower roller (4), the pressure strip (7) is mounted on the side wall of the upper roller (6), the pressure strip (7) matches the groove of the convex strip (5), and the pressure strip (7) and the convex strip (5) are arranged relative to each other.

2. A vacuum gas filling heat sealing device for food packaging as claimed in claim 1, characterized in that: It also includes a plurality of springs (8), a slot is provided on the side wall of the upper roller (6), the pressure strip (7) is slidably inserted into the slot of the upper roller (6), one end of the plurality of springs (8) is connected to the pressure strip (7), and the plurality of springs (8) are connected to the slot of the upper roller (6).

3. A vacuum inflation heat sealing device for food packaging as claimed in claim 1, characterized in that: It also includes two vertical slide grooves (9) and two nuts (10). The frame (3) is provided with two vertical slide grooves (9). The shafts at both ends of the upper roller (6) respectively pass through the two vertical slide grooves (9). The two nuts (10) are respectively rotatably screwed on the shafts at both ends of the upper roller (6). The two nuts (10) lock the upper roller (6) on the frame (3).

4. A vacuum inflation heat sealing device for food packaging as claimed in claim 1, characterized in that: The device also includes two sliders (11), two rotating shafts (12), two sliders (13), two shafts (14), two arm plates (15) and two pull rods (16). The two sliders (11) and the two sliders (13) are slidably mounted on the slide rail frame (1). The rotating shafts (12) are arranged on both sides of the middle of the feeding platform (2). The two rotating shafts (12) are rotatably connected to the two sliders (11). The two sliders (13) are arranged with arc grooves. Two shaft rods (14) are provided on both sides of one end of the feeding platform (2) away from the frame (3). The two shaft rods (14) are respectively slidably inserted in the arc grooves of the two sliders (13). One end of the two arm plates (15) is respectively connected to the rotating shafts at both ends of the lower roller (4). The other ends of the two arm plates (15) are respectively rotatably connected to one end of the two pull rods (16). The other ends of the two pull rods (16) are respectively rotatably connected to both sides of one end of the feeding platform (2) facing the frame (3).

5. A vacuum gas filling heat sealing device for food packaging as claimed in claim 4, characterized in that: The invention also comprises a switch 1 (17), an electromagnetic pin (18), a switch 2 (19) and a switch 3 (20). The switch 1 (17) and the electromagnetic pin (18) are mounted on the slide rail frame (1). The switch 1 (17) and the electromagnetic pin (18) are electrically connected. When the feeding platform (2) moves to the end of the slide rail frame (1) away from the frame (3), the switch 1 (17) is aligned with the slide block 1 (11), and the piston rod of the electromagnetic pin (18) locks the slide block 1 (11). The switch 2 (19) and the switch 3 (20) are mounted on the slide block 2 (13). The switch 2 (19) is aligned with the bottom of the arc groove of the slide block 2 (13), and the switch 3 (20) is aligned with the top of the arc groove of the slide block 2 (13).

6. A vacuum gas filling heat sealing device for food packaging as claimed in claim 1, characterized in that: It also includes a lower tube rack (21) and a plurality of cold air pipes (22), wherein the lower tube rack (21) is mounted on the lower end surface of one end of the feeding platform (2) facing the frame (3), and the plurality of cold air pipes (22) are mounted on the lower tube rack (21), and the output ends of the plurality of cold air pipes (22) face the convex strip (5).

7. A vacuum gas filling heat sealing device for food packaging as claimed in claim 1, characterized in that: The invention also comprises two front baffles (23), a cross bar (24) and a rear baffle (25), wherein the two front baffles (23) are relatively mounted on the left and right sides of one end of the feeding platform (2) facing the frame (3), the cross bar (24) is movably mounted on one end of the feeding platform (2) away from the frame (3), and the rear baffle (25) is mounted on one end of the cross bar (24), and the rear baffle (25) is located on the feeding platform (2).

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