Sealing packaging machine

Abstract

The utility model provides a sealing packaging machine which comprises a workbench, a first conveying mechanism and a second conveying mechanism are sequentially arranged on the workbench in the horizontal direction, a first sealing mechanism is arranged above the first conveying mechanism, and a second sealing mechanism is arranged between the first conveying mechanism and the second conveying mechanism. The first conveying mechanism is used for guiding a to-be-sealed packaging film to move, the first sealing mechanism is used for heat-sealing the side edge of the packaging film, the second sealing mechanism is used for heat-sealing and cutting off the packaging film with the heat-sealed side edge, and the second conveying mechanism is used for guiding the sealed packaging film to move. Due to the fact that the second sealing mechanism can conduct heat sealing and cutting off on the packaging film with the side edge heat sealing completed, the sealing procedure and the cutting-off procedure are executed on the same packaging machine, the procedures are reduced, and the efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sealing and packaging technical field, especially a sealing and packaging machine. BACKGROUND

[0002] The sealing machine is the mechanical that fills the container with the packing, after product is loaded into the packing container, in order to make product can be sealed and kept, keep product quality, avoid product loss, need to seal the packing container, and this operation is completed on the sealing machine.

[0003] With the rapid development of science and technology, sealing and packaging machine has also been technically improved, but because the function of the packaging machine on the market is relatively single, most can only seal the longitudinal film after longitudinal sealing, and then transfer to other equipment for segmentation or manual segmentation, resulting in increased process and reduced efficiency. UTILITY MODEL CONTENT

[0004] Therefore, the utility model discloses a sealing and packaging machine, which aims to solve the problem that the longitudinal sealing mechanism, the transverse sealing mechanism and the cutting mechanism in the automatic sealing and packaging machine in the prior art are synchronized by one or two driving motors in cooperation with a large number of transmission gears and transmission chains, resulting in inconsistent rotational speed of the output of each mechanism.

[0005] The utility model provides a sealing and packaging machine, including workbench, the workbench is provided with first conveying mechanism and second conveying mechanism in sequence along the horizontal direction, the top of first conveying mechanism is provided with first sealing mechanism, be provided with second sealing mechanism between first conveying mechanism and second conveying mechanism, first conveying mechanism is used for guiding the package film that waits for sealing to move, first sealing mechanism is used for heat sealing package film's side, second sealing mechanism is used for heat sealing and cutting off the package film that completes side heat sealing, second conveying mechanism is used for guiding the package film that sealing is completed to move.

[0006] Further, the first conveying mechanism includes a first conveying belt, a first conveying roller, a first driving device and a first conveying frame, the first conveying roller is rotatably connected to the first conveying frame, the first conveying roller is connected with the power output end of the first driving device, the first conveying roller is provided with several, the first conveying belt is wound on the several first conveying rollers.

[0007] Further, the first sealing mechanism comprises a first guide wheel, a second guide wheel, a first heat sealing block and a first sealing frame, the first guide wheel and the second guide wheel are both rotationally connected to the first sealing frame, the first heat sealing block is arranged on the first sealing frame, the first guide wheel, the first heat sealing block and the second guide wheel are sequentially arranged along the horizontal direction and are both provided with two, the two first guide wheels are symmetrically arranged to fold the side edges of the packaging film, the two first heat sealing blocks are symmetrically arranged to preheat the side edges of the packaging film which has been folded, and the two second guide wheels are symmetrically arranged to bond the side edges of the packaging film which has been preheated.

[0008] Further, the second conveying mechanism comprises a second conveying belt, a second conveying roller, a second driving device and a second conveying frame, the second conveying roller is rotationally connected to the second conveying frame, the second conveying roller is connected with the power output end of the second driving device, the second conveying roller is provided with a plurality of, and the second conveying belt is wound on the plurality of second conveying rollers.

[0009] Further, the second conveying frame comprises a sliding frame and a fixed frame, the second conveying roller is arranged on the sliding frame and the fixed frame, the second sealing mechanism is arranged on the sliding frame, the sliding frame is slidingly connected with the fixed frame, and the fixed frame is provided with a first driving assembly, and the first driving assembly is used to drive the sliding frame to slide relative to the fixed frame in the horizontal direction.

[0010] Further, the sliding frame comprises a first sliding frame and a second sliding frame, the second sealing mechanism comprises a second driving assembly and a second heat sealing assembly, the second driving assembly is arranged on the first sliding frame, the second heat sealing assembly is arranged on the second sliding frame, the first sliding frame is slidingly connected to the fixed frame, the second sliding frame is slidingly connected to the first sliding frame, the first driving assembly is used to drive the first sliding frame to slide in the horizontal direction with the second sliding frame, and the second driving assembly is used to drive the second sliding frame to slide in the vertical direction with the second heat sealing assembly.

[0011] Further, the first driving assembly comprises a first driving motor and a first eccentric wheel, the first driving motor is arranged on the fixed frame, the first eccentric wheel is in transmission connection with the first driving motor, the first eccentric wheel is in transmission connection with the first sliding frame, and the first driving motor is used to drive the first eccentric wheel to rotate, thereby driving the first sliding frame to reciprocatingly slide on the fixed frame in the horizontal direction.

[0012] Further, the second heat sealing assembly comprises an upper heat sealing seat and a lower heat sealing seat, both of which are slidingly connected to the second sliding frame, the second driving assembly comprises a second driving motor, a second driving shaft, an upper eccentric wheel and a lower eccentric wheel, the second driving shaft is in transmission connection with the second driving motor, the upper eccentric wheel and the lower eccentric wheel are respectively arranged at two ends of the second driving shaft, the upper eccentric wheel is in transmission connection with the upper heat sealing seat, the lower eccentric wheel is in transmission connection with the lower heat sealing seat, and the second driving motor is used for driving the upper eccentric wheel and the lower eccentric wheel to rotate synchronously, thereby driving the upper heat sealing seat and the lower heat sealing seat to slide in the vertical direction to open and close.

[0013] Further, the upper heat sealing seat is provided with a telescopic air cylinder, a cutter is arranged on the power output end of the telescopic air cylinder, and the telescopic air cylinder is used for driving the cutter to cut the packaging film after sealing.

[0014] Further, the upper heat sealing seat is provided with a pressing device, and the pressing device is used for pressing the packaging film during the heat sealing process of the second sealing mechanism.

[0015] Beneficial effects: the utility model provides a sealing packaging machine, including work table, the first conveying mechanism and the second conveying mechanism are sequentially equipped on the work table along the horizontal direction, the first sealing mechanism is arranged on the upper side of the first conveying mechanism, the second sealing mechanism is arranged between the first conveying mechanism and the second conveying mechanism, the first conveying mechanism is used for guiding the movement of the packaging film to be sealed, the first sealing mechanism is used for heat sealing the side of packaging film, the second sealing mechanism is used for heat sealing and cutting the packaging film that completes side heat sealing, and the second conveying mechanism is used for guiding the movement of the packaging film that completes sealing. Since the second sealing mechanism in the application can heat seal and cut the packaging film that completes side heat sealing, the sealing and cutting processes are performed on the same packaging machine, the process is reduced, and the efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole structure schematic diagram of the utility model sealing packaging machine;

[0017] Figure 2 It is the structure schematic diagram of the sliding frame and fixed frame connection;

[0018] Figure 3 It is the structure schematic diagram of the fixed frame;

[0019] Figure 4 It is the structure schematic diagram of the second conveying mechanism;

[0020] Figure 5 It is the structure schematic diagram of the sliding frame;

[0021] Figure 6 structure diagram of another perspective of the sliding frame;

[0022] Figure 7 structure diagram of the second driving assembly;

[0023] Figure 8 structure diagram of the upper heat sealing seat and the lower heat sealing seat slidingly connected to the second sliding frame;

[0024] Figure 9 structure diagram of the first sealing mechanism.

[0025] In the figure: 10, workbench; 1, first conveying mechanism; 11, first conveying belt; 12, first conveying roller; 14, first conveying frame; 2, second conveying mechanism; 21, second conveying belt; 22, second conveying roller; 24, second conveying frame; 25, sliding frame; 251, first sliding frame; 252, second sliding frame; 26, fixed frame; 27, first driving assembly; 271, first driving motor; 272, first eccentric wheel; 3, first sealing mechanism; 31, first guide wheel; 32, second guide wheel; 33, first heat sealing block; 34, first sealing frame; 4, second sealing mechanism; 41, second driving assembly; 411, second driving motor; 412, second driving shaft; 413, upper eccentric wheel; 414, lower eccentric wheel; 42, second heat sealing assembly; 421, upper heat sealing seat; 422, lower heat sealing seat; 423, telescopic cylinder; 424, cutter; 425, pressing device; 426, spring; 427, pressing pad; 5, power box. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described in connection with the drawings in the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Please refer to Figures 1 to 9 The present application provides a sealing packaging machine, which comprises a workbench 10, wherein the workbench 10 is provided with a first conveying mechanism 1 and a second conveying mechanism 2 in sequence along the horizontal direction, the upper portion of the first conveying mechanism 1 is provided with a first sealing mechanism 3, and the first conveying mechanism 1 and the second conveying mechanism 2 are provided with a second sealing mechanism 4, the first conveying mechanism 1 is used for guiding the movement of a packaging film to be sealed, the first sealing mechanism 3 is used for heat sealing the side edge of the packaging film, the second sealing mechanism 4 is used for heat sealing and cutting the packaging film whose side edge has been heat sealed, and the second conveying mechanism 2 is used for guiding the movement of the packaging film whose sealing has been completed.

[0028] Specifically, the packaging machine of the present application uses a strip-shaped packaging film to package products. The packaging film is placed on the first conveying mechanism 1, and the products are placed on the upper surface of the packaging film. The first sealing mechanism 3 can fold the two sides of the strip-shaped packaging film to form a continuous cylinder, and at the same time, the first sealing mechanism 3 seals the cylinder-shaped packaging film longitudinally. The packaging film after longitudinal sealing is continuously conveyed by the first conveying mechanism 1 to the second sealing mechanism 4. The second sealing mechanism 4 can perform transverse sealing and cutting, and the cut packaging film forms individual packaging bags filled with contents. The individual packaging bags after cutting are conveyed by the second conveying mechanism 2.

[0029] Specifically, the first conveying mechanism 1 includes a first conveying belt 11, a first conveying roller 12, a first driving device, and a first conveying frame 14. The first conveying roller 12 is rotationally connected to the first conveying frame 14, and the first conveying roller 12 is connected to the power output end of the first driving device. The first conveying roller 12 is provided with a plurality of first conveying rollers 12, and the first conveying belt 11 is wound around the plurality of first conveying rollers 12.

[0030] In one possible implementation, the first sealing mechanism 3 includes a first guide wheel 31, a second guide wheel 32, a first heat sealing block 33, and a first sealing frame 34. The first guide wheel 31 and the second guide wheel 32 are both rotationally connected to the first sealing frame 34. The first heat sealing block 33 is provided on the first sealing frame 34. The first guide wheel 31, the first heat sealing block 33, and the second guide wheel 32 are sequentially arranged in the horizontal direction and are both provided with two. The two first guide wheels 31 are symmetrically arranged to fold the side edges of the packaging film. The two first heat sealing blocks 33 are symmetrically arranged to preheat the side edges of the packaging film that have been folded. The two second guide wheels 32 are symmetrically arranged to bond the side edges of the packaging film that have been preheated. In this embodiment, the first guide wheel 31, the second guide wheel 32, and the first heat sealing block 33 are all arranged above the first conveying belt 11. When the packaging film first enters the gap between the two first guide wheels 31, the side edges (i.e., the long edges of the packaging film) of the packaging film need to be folded manually and placed in the gap between the two first guide wheels 31. Then the folded side edges are conveyed to the gap between the two first heat sealing blocks 33. The first heat sealing block 33 can heat and preheat the folded side edges to make the side edges of the packaging bag high-temperature melted and adhesive. The preheated side edges are conveyed to the gap between the two second guide wheels 32, and the two second guide wheels 32 extrude and cool the side edges to make the two side surfaces adhesive, completing the longitudinal sealing.

[0031] Specifically, the second conveying mechanism 2 comprises a second conveying belt 21, second conveying rollers 22, a second driving device and a second conveying frame 24, the second conveying rollers 22 are rotationally connected to the second conveying frame 24, the second conveying rollers 22 are connected to the power output end of the second driving device, and the second conveying rollers 22 are provided with a plurality of the second conveying belt 21 is wound around the second conveying rollers 22.

[0032] In the present application, the first driving device and the second driving device are arranged in the power box 5, and the power box 5 outputs power to the conveying rollers through the first driving device and the second driving device.

[0033] In a feasible embodiment, the second conveying frame 24 comprises a sliding frame 25 and a fixed frame 26, the second conveying rollers 22 are arranged on the sliding frame 25 and the fixed frame 26, the second sealing mechanism 4 is arranged on the sliding frame 25, the sliding frame 25 is slidingly connected to the fixed frame 26, the first driving assembly 27 is arranged on the fixed frame 26, and the first driving assembly 27 is used to drive the sliding frame 25 to slide relative to the fixed frame 26 in the horizontal direction. Since the second sealing mechanism 4 needs a certain time to heat seal and cut off the packaging film, in order to ensure the continuity between the processes during packaging, the second sealing mechanism 4 needs to maintain the same speed as the second conveying belt 21, so as to heat seal and cut off during movement. In order to realize that the overall length of the second conveying belt 21 does not change during the sliding of the sliding frame 25, two second conveying rollers 22 are arranged on the sliding frame 25, and the inner surface and the outer surface of the second conveying belt 21 are wound around the two second conveying rollers 22 respectively. When the sliding frame 25 moves, the two second conveying rollers 22 are driven to move synchronously, so the length of the second conveying belt 21 between the two second conveying rollers 22 does not change, and thus the overall length of the second conveying belt 21 does not change when the sliding frame 25 moves.

[0034] In an embodiment, the sliding frame 25 comprises a first sliding frame 251 and a second sliding frame 252, the second sealing mechanism 4 comprises a second driving assembly 41 and a second heat sealing assembly 42, the second driving assembly 41 is arranged on the first sliding frame 251, the second heat sealing assembly 42 is arranged on the second sliding frame 252, the first sliding frame 251 is slidingly connected to the fixed frame 26, the second sliding frame 252 is slidingly connected to the first sliding frame 251, the first driving assembly 27 is configured to drive the first sliding frame 251 to slide the second sliding frame 252 in the horizontal direction, and the second driving assembly 41 is configured to drive the second sliding frame 252 to slide the second heat sealing assembly 42 in the vertical direction. The second heat sealing assembly 42 needs to perform reciprocating motion, after completing the cutting of the previous heat sealing position, it needs to return to the initial position to heat seal and cut the next heat sealing position.

[0035] Specifically, the first driving assembly 27 comprises a first driving motor 271 and a first eccentric wheel 272, the first driving motor 271 is arranged on the fixed frame 26, the first eccentric wheel 272 is in transmission connection with the first driving motor 271, the first eccentric wheel 272 is in transmission connection with the first sliding frame 251, the first driving motor 271 is configured to drive the first eccentric wheel 272 to rotate, thereby driving the first sliding frame 251 to slide on the fixed frame 26 in the horizontal direction. Due to the eccentricity of the first eccentric wheel 272, when the first eccentric wheel 272 rotates, the movement track of the first sliding frame 251 will produce periodic reciprocating motion.

[0036] In an embodiment, the second heat sealing assembly 42 comprises an upper heat sealing seat 421 and a lower heat sealing seat 422, both of which are slidingly connected to the second sliding frame 252, the second drive assembly 41 comprises a second drive motor 411, a second drive shaft 412, an upper eccentric wheel 413 and a lower eccentric wheel 414, the second drive shaft 412 is drivingly connected to the second drive motor 411, the upper eccentric wheel 413 and the lower eccentric wheel 414 are respectively arranged at two ends of the second drive shaft 412, the upper eccentric wheel 413 is drivingly connected to the upper heat sealing seat 421, and the lower eccentric wheel 414 is drivingly connected to the lower heat sealing seat 422, the second drive motor 411 is used to drive the upper eccentric wheel 413 and the lower eccentric wheel 414 to rotate synchronously, thereby driving the upper heat sealing seat 421 and the lower heat sealing seat 422 to slide in the vertical direction to open and close. In this embodiment, the farthest point of the upper eccentric wheel 413 from the second drive shaft 412 and the farthest point of the lower eccentric wheel 414 from the second drive shaft 412 extend in opposite directions, thereby causing the upper heat sealing seat 421 and the lower heat sealing seat 422 to slide in the vertical direction to open and close when the second drive motor 411 drives the upper eccentric wheel 413 and the lower eccentric wheel 414 to rotate synchronously. For example, when the farthest point of the upper eccentric wheel 413 from the second drive shaft 412 is downward and the farthest point of the lower eccentric wheel 414 from the second drive shaft 412 is upward, the distance between the upper heat sealing seat 421 and the lower heat sealing seat 422 is the smallest, and the second heat sealing assembly 42 is in a closed state. When the farthest point of the upper eccentric wheel 413 from the second drive shaft 412 is upward and the farthest point of the lower eccentric wheel 414 from the second drive shaft 412 is downward, the distance between the upper heat sealing seat 421 and the lower heat sealing seat 422 is the largest, and the second heat sealing assembly 42 is in an open state. The second drive motor 411 of the present application is a double-end output motor.

[0037] In an embodiment, the upper heat sealing seat 421 is provided with a telescopic pneumatic cylinder 423, a cutter 424 is arranged at the power output end of the telescopic pneumatic cylinder 423, and the telescopic pneumatic cylinder 423 is used to drive the cutter 424 to cut the packaging film after sealing. In this embodiment, the telescopic pneumatic cylinder 423 can drive the cutter 424 to move downward to cut the packaging film.

[0038] In an embodiment, the upper heat sealing seat 421 is provided with a pressing device 425, which is used to press the packaging film during the heat sealing process of the second sealing mechanism 4. Specifically, the pressing device 425 comprises a spring 426 arranged on the upper heat sealing seat 421 and a large-area pressing pad 427. The spring 426 is used to drive the pressing pad 427 to press downward. The upper heat sealing seat 421 can drive the pressing pad 427 to press downward to tighten the packaging bag, so as to avoid the deviation of the packaging bag during the heat sealing and cutting process.

[0039] It is apparent to those skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments, and that the application can be implemented in other particular forms without departing from the spirit or essential characteristics of the application. The foregoing embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the features to which the reference signs are attached.

[0040] The above-described embodiments are merely intended for describing and illustrating, not limiting, the technical solutions of the present application; even though the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A machine for sealing packages, characterized in that: The utility model provides a packaging film heat sealing device, including workbench (10), first conveying mechanism (1) and second conveying mechanism (2) are sequentially provided with along horizontal direction on the workbench (10), the first conveying mechanism (1) top is provided with first sealing mechanism (3), between first conveying mechanism (1) and second conveying mechanism (2) is provided with second sealing mechanism (4), first conveying mechanism (1) is used for guiding the package film to be sealed to move, first sealing mechanism (3) is used for heat sealing package film's side, second sealing mechanism (4) is used for heat sealing and cutting off the package film that completes side heat sealing, second conveying mechanism (2) is used for guiding the package film that sealing is completed to move.

2. The machine according to claim 1, characterized in that: The first conveying mechanism (1) includes a first conveying belt (11), a first conveying roller (12), a first driving device and a first conveying frame (14), the first conveying roller (12) is rotatably connected to the first conveying frame (14), the first conveying roller (12) is connected with the power output end of the first driving device, the first conveying roller (12) is provided with several, and the first conveying belt (11) is wound on the several first conveying rollers (12).

3. The machine according to claim 1, characterized in that: The first sealing mechanism (3) includes a first guide wheel (31), a second guide wheel (32), a first heat sealing block (33) and a first sealing frame (34), the first guide wheel (31) and the second guide wheel (32) are rotatably connected to the first sealing frame (34), the first heat sealing block (33) is arranged on the first sealing frame (34), the first guide wheel (31), the first heat sealing block (33) and the second guide wheel (32) are sequentially arranged along the horizontal direction and are provided with two, the two first guide wheels (31) are symmetrically arranged to fold the side of the packaging film, the two first heat sealing blocks (33) are symmetrically arranged to preheat the side of the packaging film that has been folded, and the two second guide wheels (32) are symmetrically arranged to bond the side of the packaging film that has been preheated.

4. The machine according to claim 1, characterized in that: The second conveying mechanism (2) includes a second conveying belt (21), a second conveying roller (22), a second driving device and a second conveying frame (24), the second conveying roller (22) is rotatably connected to the second conveying frame (24), the second conveying roller (22) is connected with the power output end of the second driving device, the second conveying roller (22) is provided with several, and the second conveying belt (21) is wound on the several second conveying rollers (22).

5. The machine according to claim 4, characterized in that: The second conveying frame (24) includes a sliding frame (25) and a fixed frame (26), the second conveying roller (22) is arranged on the sliding frame (25) and the fixed frame (26), the second sealing mechanism (4) is arranged on the sliding frame (25), the sliding frame (25) is slidably connected with the fixed frame (26), the first driving assembly (27) is arranged on the fixed frame (26), and the first driving assembly (27) is used for driving the sliding frame (25) to slide relative to the fixed frame (26) in the horizontal direction.

6. The machine according to claim 5, characterized in that: The sliding frame (25) comprises a first sliding frame (251) and a second sliding frame (252), the second sealing mechanism (4) comprises a second driving assembly (41) and a second heat sealing assembly (42), the second driving assembly (41) is arranged on the first sliding frame (251), the second heat sealing assembly (42) is arranged on the second sliding frame (252), the first sliding frame (251) is slidingly connected to the fixed frame (26), the second sliding frame (252) is slidingly connected to the first sliding frame (251), the first driving assembly (27) is used for driving the first sliding frame (251) to drive the second sliding frame (252) to slide in the horizontal direction, and the second driving assembly (41) is used for driving the second sliding frame (252) to drive the second heat sealing assembly (42) to slide in the vertical direction.

7. The machine according to claim 6, characterized in that: The first driving assembly (27) comprises a first driving motor (271) and a first eccentric wheel (272), the first driving motor (271) is arranged on the fixed frame (26), the first eccentric wheel (272) is in transmission connection with the first driving motor (271), and the first eccentric wheel (272) is in transmission connection with the first sliding frame (251); the first driving motor (271) is used for driving the first eccentric wheel (272) to rotate, thereby driving the first sliding frame (251) to slide horizontally on the fixed frame (26).

8. The machine according to claim 6, characterized in that: The second heat sealing assembly (42) comprises an upper heat sealing seat (421) and a lower heat sealing seat (422), the upper heat sealing seat (421) and the lower heat sealing seat (422) are both slidingly connected to the second sliding frame (252), the second driving assembly (41) comprises a second driving motor (411), a second driving shaft (412), an upper eccentric wheel (413) and a lower eccentric wheel (414), the second driving shaft (412) is in transmission connection with the second driving motor (411), the upper eccentric wheel (413) and the lower eccentric wheel (414) are arranged at two ends of the second driving shaft (412) respectively, the upper eccentric wheel (413) is in transmission connection with the upper heat sealing seat (421), the lower eccentric wheel (414) is in transmission connection with the lower heat sealing seat (422), and the second driving motor (411) is used for driving the upper eccentric wheel (413) and the lower eccentric wheel (414) to rotate synchronously, thereby driving the upper heat sealing seat (421) and the lower heat sealing seat (422) to slide in the vertical direction to perform opening and closing actions.

9. The machine according to claim 8, characterized in that: The upper heat sealing seat (421) is provided with a telescopic air cylinder (423), a cutter (424) is arranged at the power output end of the telescopic air cylinder (423), and the telescopic air cylinder (423) is used for driving the cutter (424) to cut the packaging film after sealing.

10. The machine according to claim 9, characterized in that: The upper heat sealing seat (421) is provided with a pressing device (425), and the pressing device (425) is used for pressing the packaging film during the cutting process of the cutter (424).

Images