A heavy-duty flying knife bag making machine

Abstract

The utility model relates to the technical field of bag making machines, and in particular to a heavy-packaging flying knife bag making machine, comprising a frame, on which a feeding mechanism for transporting packaging bags, a heat-sealing mechanism for heat-sealing the packaging bags, and a flying knife mechanism for cutting the heat-sealed packaging bags are arranged in sequence along the transmission direction of the packaging bags; the heat-sealing mechanism comprises an upper hot knife assembly and a lower hot knife assembly, and the two can approach and move away from each other, the lower hot knife assembly comprises a lower hot knife mounting plate, at least one group of telescopic cylinders is arranged on the frame below the lower hot knife mounting plate, the output end of the telescopic cylinder is connected to the bottom of the lower hot knife mounting plate, a lower hot knife is arranged on the top of the lower hot knife mounting plate, and the telescopic cylinder can cause the lower hot knife to move towards or away from the upper hot knife assembly. The beneficial effects of the utility model are: providing a heavy-packaging flying knife bag making machine with a simple structure, easy to assemble and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of bag making machines, in particular to a heavy-packaging flying knife bag making machine. Background Art

[0002] At present, packaging films that can carry 10kg-50kg of solid particles or powdered materials are generally called heavy packaging films. Heavy packaging films are mainly used to package blown film particles, fertilizers, feed, rice, soybeans and grains. It includes PP woven bags, paper bags and co-extruded PE heavy packaging bags. The traditional packaging forms with the above packaging as the main body still dominate the domestic market. Bag making machine is a machine that makes various plastic packaging bags or other material packaging bags. Its processing range is plastic or other material packaging bags of various sizes, thicknesses and specifications.

[0003] A heavy-duty packaging bag making machine with a publication number of "CN 216993278 U" comprises a main frame, on which a material discharge mechanism, an eight-shaped ironing mechanism, a heat sealing mechanism and a flying knife are arranged in sequence along the transmission direction of the heavy packaging film. The heat sealing mechanism comprises a hot knife beam and a hot knife bottom plate arranged up and down, an upper hot knife is arranged at the bottom of the hot knife beam, and upper hot knife lifting rods are vertically penetrated at both ends of the hot knife beam; a lower hot knife is arranged at the top of the hot knife bottom plate, and lower hot knife lifting rods are vertically penetrated at both ends of the hot knife bottom plate, and a hot knife lifting drive unit drives the lower hot knife lifting rod and the upper hot knife lifting rod to move, driving the hot knife beam and the hot knife bottom plate to approach or move away from each other, so that the upper hot knife and the lower hot knife are approached or moved away from each other;

[0004] In the above document, heavy packaging film can be cut by a flying knife, but the lifting drive unit of the upper and lower hot knife adopts an eccentric wheel mechanism. The servo motor drives the synchronous shaft to rotate, so that the upper and lower hot knife eccentric wheels can rotate synchronously, and the upper and lower hot knife lifting rods can move up and down. However, the eccentric wheel mechanism has a complex structure and uses many parts. The upper and lower hot knives both use an eccentric wheel mechanism, which makes assembly, disassembly and maintenance more complicated, increasing the manufacturing and maintenance costs. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a heavy-packaging flying knife bag making machine with a simple structure and convenient assembly and maintenance in view of the deficiencies of the above-mentioned prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a heavy-packaging flying knife bag making machine, comprising a frame, on which a feeding mechanism for transporting packaging bags, a heat-sealing mechanism for heat-sealing packaging bags and a flying knife mechanism for cutting the heat-sealed packaging bags are arranged in sequence along the transmission direction of the packaging bags; the heat-sealing mechanism comprises an upper hot knife assembly and a lower hot knife assembly, and the two can approach and move away from each other, and is characterized in that: the lower hot knife assembly comprises a lower hot knife mounting plate, and at least one group of telescopic cylinders is arranged on the frame below the lower hot knife mounting plate, the output end of the telescopic cylinder is connected to the bottom of the lower hot knife mounting plate, and a lower hot knife is arranged on the top of the lower hot knife mounting plate, and the telescopic cylinder can cause the lower hot knife to move towards or away from the upper hot knife assembly.

[0007] The above-mentioned technical scheme is adopted: compared with the prior art in which both the upper hot knife and the lower hot knife adopt an eccentric wheel driving mechanism, the utility model adopts a telescopic cylinder for the lower hot knife. During use, it is only necessary to start the telescopic cylinder, and the output shaft of the telescopic cylinder drives the lower hot knife mounting plate to move, thereby prompting the lower hot knife installed on the lower hot knife mounting plate to move toward or away from the upper hot knife assembly, and cooperate with the upper hot knife assembly to achieve heat sealing of the packaging bag; at the same time, the cylinder as a driving device can provide a faster response speed, so that the movement of the hot knife is faster and more immediate, and the structure is simple, which is more convenient in assembly, disassembly and maintenance.

[0008] A further configuration of the utility model is: a connecting piece is provided at the output end of the telescopic cylinder, a mounting seat for installing the connecting piece is provided at the bottom of the lower ironing knife mounting plate, a mounting groove is provided in the mounting seat, first connecting holes are penetrated on both sides of the mounting groove, a second connecting hole corresponding to the first connecting hole is provided on the connecting piece, and the connecting piece can be located in the mounting groove.

[0009] The above technical solution is adopted: through the setting of the connecting piece and the mounting seat, during the assembly process, it is only necessary to place the connecting piece in the mounting groove so that the first connecting hole and the second connecting hole correspond to each other, and then connect them through fasteners to complete the assembly, so that when the telescopic cylinder is started, the lower hot knife can be driven to move.

[0010] The utility model is further configured as follows: a connecting pin is provided in the frame near the telescopic cylinder, a mounting protrusion is provided at the bottom of the telescopic cylinder for mounting with the connecting pin, and a first mounting hole is provided on the mounting protrusion

[0011] The above technical solution is adopted: by setting the connecting pin and the mounting protrusion, the telescopic cylinder can be installed in the frame. It only needs to penetrate the first mounting hole through the connecting pin and complete the installation through the fastener. The structure is simple and easy for the staff to assemble.

[0012] The utility model is further configured as follows: sliding blocks are arranged on both sides of the upper ironing knife installation plate, and guide rails for the sliding blocks to slide are arranged in the frame.

[0013] The above technical solution is adopted: through the setting of the sliding block and the guide rail, when the telescopic cylinder drives the upper hot knife mounting plate, the upper hot knife mounting plate can reciprocate along the guide rail through the sliding block to ensure the lifting effect of the upper hot knife.

[0014] The utility model is further configured as follows: the upper ironing knife assembly comprises an upper ironing knife beam and a synchronous shaft located below the upper ironing knife beam, an upper ironing knife is arranged at the bottom of the upper ironing knife beam, a connecting rod is vertically arranged at the end of the upper ironing knife beam, an eccentric wheel is arranged at the end of the synchronous shaft, an eccentric block is arranged on the eccentric wheel, one end of the connecting rod away from the upper ironing knife beam is hinged to the eccentric block, and a driving structure is arranged on the synchronous shaft which can cause the synchronous shaft to rotate and link the upper ironing knife to rise and fall.

[0015] The above technical solution is adopted: during use, the driving structure causes the synchronous shaft to rotate, which further drives the eccentric wheel to rotate, causing the connecting rod to move in a circle with the eccentric block, so that the connecting rod can drive the upper hot knife crossbeam to rise and fall, thereby driving the upper hot knife to rise and fall. Compared with the prior art in which the upper hot knife lifting rod is directly connected to the top of the eccentric wheel, the structure adopted in the utility model makes the moving stroke of the upper hot knife lifting rod longer, thereby improving adaptability.

[0016] The utility model is further configured as follows: the connecting rod comprises an upper ironing knife lifting rod connected to the upper ironing knife crossbeam and a first connecting rod hinged to the other end of the upper ironing knife lifting rod, a first spring is wound around the outer wall of the upper ironing knife lifting rod, two guide blocks are arranged at intervals on the outer side of the frame, a first through hole is arranged on the guide block for the upper ironing knife lifting rod to pass through, an end of the first connecting rod away from the upper ironing knife lifting rod is hinged to the eccentric block, a first synchronous pulley is arranged on the synchronous shaft, a first driving motor is arranged in the frame, a second synchronous pulley is linked to the output end of the first driving motor, and a first transmission belt is linked between the first synchronous pulley and the second synchronous pulley.

[0017] The above-mentioned technical solution is adopted: during use, by starting the first drive motor, the first synchronous pulley is rotated through the second synchronous pulley and the first transmission belt, thereby prompting the synchronous shaft to rotate, and further driving the eccentric wheel to rotate, thereby prompting the first connecting rod to move in a circle with the eccentric block. Compared with the prior art in which the upper hot knife lifting rod is directly connected to the top of the eccentric wheel, the structure adopted by the utility model makes the movement stroke of the upper hot knife lifting rod longer. At the same time, the other end of the first connecting rod is hinged to the upper hot knife lifting rod, thereby driving the upper hot knife lifting rod to rise and fall. In addition, a first spring is wound around the outer wall of the upper hot knife lifting rod, and the two ends of the first spring are respectively connected to the guide blocks, which can reduce the weight of the upper hot knife beam and cause it to fall down. In addition, due to the setting of the guide block, the movement direction of the upper hot knife lifting rod can be guaranteed not to deviate.

[0018] A further arrangement of the utility model is that a limiting mechanism is provided on the side of the upper hot knife beam away from the feeding direction of the packaging bag, a cutting channel for the flying knife mechanism to move is formed between the limiting mechanism and the heat sealing mechanism, the limiting mechanism includes a plurality of second connecting rods located at the bottom of the upper hot knife beam, one end of the second connecting rod is connected to the upper hot knife beam, and the other end is connected to a pressure block, a second spring is wound around the outer wall of the second connecting rod, a workbench is provided in the frame below the pressure block, and the upper end surface of the workbench can be against the pressure block.

[0019] The above technical solution is adopted: through the setting of the limiting mechanism, since one end of the second connecting rod is connected to the upper hot knife cross beam, and the other end is connected to a pressure block, when the upper hot knife assembly is raised or lowered, it can simultaneously drive the limiting mechanism to be raised or lowered, and when the upper hot knife moves downward, it also drives the limiting mechanism to move downward, and its pressure block can press the packaging bag, which is convenient for the flying knife mechanism to cut, thereby ensuring the cutting effect of the packaging bag. In addition, the outer wall of the second connecting rod is wrapped with a second spring, which can reduce impact and vibration, play a buffering role, and make the limiting mechanism more stable when pressing the packaging bag to limit the position.

[0020] The utility model is further configured as follows: the flying knife mechanism comprises a second driving motor, the output end of the second driving motor is linked with a synchronous belt, a flying knife seat is arranged on the synchronous belt, a first connecting block is arranged on the flying knife seat, a second connecting block is arranged on the first connecting block towards the direction close to the heat sealing mechanism, the first connecting block and the second connecting block are perpendicular to each other, a third connecting block is arranged on the end of the second connecting block away from the first connecting block, the third connecting block and the second connecting block are perpendicular to each other, a flying knife is arranged in the third connecting block, and the third connecting block and the flying knife are located in the cutting channel.

[0021] The above technical solution is adopted: during use, by starting the second drive motor, the synchronous belt can be linked to rotate. At the same time, since the flying knife seat is arranged on the synchronous belt, the synchronous belt can drive the flying knife seat to move, so that the flying knife installed on the flying knife seat can fly and cut the packaging bag. At the same time, due to the setting of the second and third connecting blocks, and the two are arranged in an "L" shape, it can avoid the limiting mechanism, so that the flying knife can be located in the cutting channel to complete the cutting action.

[0022] A further configuration of the utility model is: the feeding mechanism includes a first conveying roller rotatably arranged in a frame, a second conveying roller is rotatably connected to the frame below the first conveying roller, and the second conveying roller and the first conveying roller are linked to each other, a driven gear is provided at one end of the second conveying roller, a third driving motor is provided in the frame, a driving gear is provided at the output end of the third driving motor, and a second transmission belt is linked between the driving gear and the driven gear.

[0023] The above technical solution is adopted: by starting the third drive motor, the active gear is driven to rotate, and the driven gear is rotated through the second transmission belt, thereby driving the second conveyor roller to rotate, and further prompting the first conveyor roller to rotate with the second conveyor roller, so as to realize the transportation of the packaging bags.

[0024] A further configuration of the utility model is that: an air pipe fixing seat is provided on the first conveying roller and the second conveying roller near the feeding direction of the packaging bag, a plurality of air pipes are extended from the air pipe fixing seat to between the first conveying roller and the second conveying roller, and a plurality of accommodating grooves for placing the air supply pipes are provided along the circumference of the outer walls of the first conveying roller and the second conveying roller.

[0025] The above technical solution is adopted: through the setting of the air pipe and the air pipe fixing seat, when the first and second conveying rollers transport the packaging bags, the air pipe is connected to the external air source to blow air to the packaging, thereby cooperating with the first and second conveying rollers to realize the feeding of the packaging bags and improve the feeding effect. At the same time, due to the setting of the receiving groove, the air pipe is located in the receiving groove, and when the first and second transmission rollers rotate, the air pipe will not be affected.

[0026] The utility model is further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0028] Figure 2 It is a schematic diagram of the overall structure of the utility model from different viewing angles.

[0029] Figure 3 It is a schematic diagram of the internal structure of the utility model.

[0030] Figure 4 Schematic diagram of the internal structure of the utility model from different viewing angles.

[0031] Figure 5 This is a partial exploded view of the lower hot knife assembly of the utility model.

[0032] Figure 6 It is a schematic diagram of the local structure of the cutter mechanism of the utility model.

[0033] Figure 7 It is a schematic diagram of the structure of the feeding mechanism of the utility model.

[0034] Figure 8 It is a schematic diagram of the feeding mechanism structure of the utility model from different viewing angles.

[0035] Fig. 9 For this utility model Figure 8 Enlarged view of point A in the middle.

[0036] Description of reference numerals: frame 1, telescopic cylinder 11, connecting member 111, second connecting hole 111a, mounting protrusion 112, first mounting hole 112a, connecting pin 12, guide block 13, first driving motor 14, second synchronous pulley 141, first transmission belt 142, workbench 15, third driving motor 16, driving gear 161, second transmission belt 162;

[0037] Feeding mechanism 2, first conveying roller 21, second conveying roller 22, driven gear 221, containing groove 222, air pipe fixing seat 23, air pipe 231;

[0038] Heat sealing mechanism 3, upper hot knife assembly 31, upper hot knife cross beam 311, upper hot knife 312, upper hot knife lifting rod 313, first spring 313a, first connecting rod 314, eccentric wheel 315, eccentric block 315a, synchronous shaft 316, first synchronous pulley 317, lower hot knife assembly 32, lower hot knife mounting plate 321, mounting seat 321a, mounting groove 321b, first connecting hole 321c, sliding block 321d, guide rail 321e, lower hot knife 322, mounting member 323;

[0039] Flying knife mechanism 4, second driving motor 41, synchronous belt 42, flying knife seat 43, first connecting block 431, second connecting block 432, third connecting block 433, flying knife 434;

[0040] Limiting mechanism 5 , second connecting rod 51 , second spring 511 , pressing block 52 . DETAILED DESCRIPTION

[0041] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0042] like Figure 1-9 The heavy packaging flying knife 434 bag making machine shown in the figure comprises a frame 1, on which a feeding mechanism 2 for transporting packaging bags, a heat sealing mechanism 3 for heat sealing the packaging bags and a flying knife 434 mechanism 4 for cutting the heat-sealed packaging bags are arranged in sequence along the transmission direction of the packaging bags; the heat sealing mechanism 3 comprises an upper hot knife assembly 31 and a lower hot knife assembly 32, and the two can approach and move away from each other, the lower hot knife assembly 32 comprises a lower hot knife mounting plate 321, and at least one group of telescopic cylinders 11 is arranged below the lower hot knife mounting plate 321 on the frame 1, the output end of the telescopic cylinder 11 is connected to the bottom of the lower hot knife mounting plate 321, and a lower hot knife 322 is arranged on the top of the lower hot knife mounting plate 321, and preferably a plurality of groups of mounting parts 323 are arranged between the lower hot knife mounting plate 321 and the lower hot knife 322, and the telescopic cylinder 11 can cause the lower hot knife 322 to move towards or away from the upper hot knife assembly 31.

[0043] like Figure 3-5 The output end of the telescopic cylinder 11 is provided with a connecting member 111, and a mounting seat 321a for mounting the connecting member 111 is provided at the bottom of the lower ironing knife mounting plate 321, and a mounting groove 321b is provided in the mounting seat 321a, and first connecting holes 321c are penetrated on both sides of the mounting groove 321b, and a second connecting hole 111a corresponding to the first connecting hole 321c is provided on the connecting member 111, and the connecting member 111 can be located in the mounting groove 321b; Figure 4 A connecting pin 12 is provided near the telescopic cylinder 11 in the frame 1 shown, a mounting protrusion 112 for mounting with the connecting pin 12 is provided at the bottom of the telescopic cylinder 11, and a first mounting hole 112a is provided on the mounting protrusion 112; sliding blocks 321d are provided on both sides of the mounting plate of the upper ironing knife 312, and a guide rail 321e for the sliding block 321d to slide is provided in the frame 1.

[0044] like Figure 3-4The upper ironing knife assembly 31 shown includes an upper ironing knife beam 311 and a synchronous shaft 316 located below the upper ironing knife beam 311, an upper ironing knife 312 is arranged at the bottom of the upper ironing knife beam 311, a connecting rod is vertically arranged at the end of the upper ironing knife beam 311, an eccentric wheel 315 is arranged at the end of the synchronous shaft 316, an eccentric block 315a is arranged on the eccentric wheel 315, an end of the connecting rod away from the upper ironing knife beam 311 is hinged to the eccentric block 315a, and a driving structure capable of causing the synchronous shaft 316 to rotate and linking the upper ironing knife 312 to move up and down is arranged on the synchronous shaft 316; the connecting rod includes an upper ironing knife lifting rod 313 connected to the upper ironing knife beam 311 and a first connecting rod 314 hinged to the other end of the upper ironing knife lifting rod 313, and an outer wall of the upper ironing knife lifting rod 313 is provided. A first spring 313a is wound around it, and two guide blocks 13 are arranged at intervals on the outside of the frame 1. The guide block 13 is provided with a first through hole for the upper ironing knife lifting rod 313 to pass through. The first connecting rod 314 is hinged to the eccentric block 315a at one end away from the upper ironing knife lifting rod 313. A first synchronous belt 42 wheel 317 is arranged on the synchronous shaft 316. A first driving motor 14 is arranged in the frame 1, and a second synchronous belt 42 wheel 141 is linked to the output end of the first driving motor 14. A first transmission belt 142 is linked between the first synchronous belt 42 wheel 317 and the second synchronous belt 42 wheel 141. The above-mentioned first driving motor 14, the first synchronous belt 42 wheel 317, the second synchronous belt 42 wheel 141 and the first transmission belt 142 form a driving structure.

[0045] like Figure 1-3 The upper ironing knife beam 311 shown is provided with a limiting mechanism 5 on the side away from the feeding direction of the packaging bag, and a cutting channel for the flying knife 434 mechanism 4 to move is formed between the limiting mechanism 5 and the heat sealing mechanism 3. The limiting mechanism 5 includes a plurality of second connecting rods 51 located at the bottom of the upper ironing knife beam 311, one end of the second connecting rod 51 is connected to the upper ironing knife beam 311, and the other end is connected to a pressure block 52. A second spring 511 is wound around the outer wall of the second connecting rod 51, and a workbench 15 is provided below the pressure block 52 in the frame 1, and the upper end surface of the workbench 15 can be against the pressure block 52.

[0046] like Figure 3 , 6 The flying knife 434 mechanism 4 shown includes a second drive motor 41, the output end of the second drive motor 41 is linked to a synchronous belt 42, a flying knife seat 4343 is provided on the synchronous belt 42, a first connecting block 431 is provided on the flying knife seat 4343, the first connecting block 431 is provided with a second connecting block 432 in the direction close to the heat sealing mechanism 3, the first connecting block 431 and the second connecting block 432 are perpendicular to each other, the second connecting block 432 is provided with a third connecting block 433 at one end away from the first connecting block 431, the third connecting block 433 and the second connecting block 432 are perpendicular to each other, a flying knife 434 is provided in the third connecting block 433, and the third connecting block 433 and the flying knife 434 are located in the cutting channel.

[0047] like Figure 7-9 The feeding mechanism 2 shown includes a first conveying roller 21 rotatably arranged in a frame 1, a second conveying roller 22 is rotatably connected to the frame 1 below the first conveying roller 21, and the second conveying roller 22 is linked to the first conveying roller 21, a driven gear 221 is provided at one end of the second conveying roller 22, a third driving motor 16 is provided in the frame 1, a driving gear 161 is provided at the output end of the third driving motor 16, and a second transmission belt 162 is linked between the driving gear 161 and the driven gear 221; an air pipe fixing seat 23 is provided on the first conveying roller 21 and the second conveying roller 22 near the feeding direction of the packaging bag, a plurality of air pipes 231 are extended from the air pipe fixing seat 23 to between the first conveying roller 21 and the second conveying roller 22, and a plurality of accommodating grooves 222 for placing the air supply pipes 231 are provided along the circumference of the outer walls of the first conveying roller 21 and the second conveying roller 22.

[0048] During use, compared with the prior art in which both the upper hot knife 312 and the lower hot knife 322 adopt the eccentric wheel 315 driving mechanism, the utility model adopts the telescopic cylinder 11 through the lower hot knife 322. During use, it is only necessary to start the telescopic cylinder 11, and the output shaft of the telescopic cylinder 11 drives the lower hot knife mounting plate 321 to move, thereby prompting the lower hot knife 322 installed on the lower hot knife mounting plate 321 to move toward or away from the upper hot knife assembly 31, and cooperate with the upper hot knife assembly 31 to achieve heat sealing of the packaging bag; at the same time, the cylinder as a driving device can provide a faster response speed, so that the movement of the hot knife is faster and more immediate, and the structure is simple, and it is more convenient in assembly, disassembly and maintenance.

Claims

1. A heavy-duty flying knife bag making machine, comprising a frame, on which a feeding mechanism for transporting packaging bags, a heat-sealing mechanism for heat-sealing packaging bags, and a flying knife mechanism for cutting the heat-sealed packaging bags are arranged in sequence along the packaging bag transmission direction; the heat-sealing mechanism comprises an upper hot knife assembly and a lower hot knife assembly, and the two can approach and move away from each other, characterized in that: The lower ironing knife assembly includes a lower ironing knife mounting plate. At least one group of telescopic cylinders is provided on the frame below the lower ironing knife mounting plate. The output end of the telescopic cylinder is connected to the bottom of the lower ironing knife mounting plate. A lower ironing knife is provided on the top of the lower ironing knife mounting plate. The telescopic cylinder can cause the lower ironing knife to move towards or away from the upper ironing knife assembly.

2. A heavy-packaging flying knife bag making machine according to claim 1, characterized in that: A connecting piece is provided at the output end of the telescopic cylinder, a mounting seat for installing the connecting piece is provided at the bottom of the lower ironing knife mounting plate, a mounting groove is provided in the mounting seat, first connecting holes are provided on both sides of the mounting groove, a second connecting hole corresponding to the first connecting hole is provided on the connecting piece, and the connecting piece can be located in the mounting groove.

3. A heavy-packaging flying knife bag making machine according to claim 2, characterized in that: A connecting pin is arranged in the frame near the telescopic cylinder, a mounting convex block for mounting with the connecting pin is arranged at the bottom of the telescopic cylinder, and a first mounting hole is arranged on the mounting convex block.

4. The heavy-packaging flying knife bag making machine according to claim 3 is characterized in that: Sliding blocks are arranged on both sides of the upper ironing knife installation plate, and guide rails for the sliding blocks to slide are arranged in the frame.

5. A heavy packaging flying knife bag making machine according to any one of claims 1 to 4, characterized in that: The upper ironing knife assembly includes an upper ironing knife beam and a synchronous shaft located below the upper ironing knife beam, an upper ironing knife is arranged at the bottom of the upper ironing knife beam, a connecting rod is vertically arranged at the end of the upper ironing knife beam, an eccentric wheel is arranged at the end of the synchronous shaft, an eccentric block is arranged on the eccentric wheel, one end of the connecting rod away from the upper ironing knife beam is hinged to the eccentric block, and a driving structure is arranged on the synchronous shaft, which can cause the synchronous shaft to rotate and link the upper ironing knife to rise and fall.

6. The heavy-packaging flying knife bag making machine according to claim 5, characterized in that: The connecting rod includes an upper ironing knife lifting rod connected to the upper ironing knife crossbeam and a first connecting rod hinged to the other end of the upper ironing knife lifting rod, a first spring is wound around the outer wall of the upper ironing knife lifting rod, two guide blocks are arranged at intervals on the outer side of the frame, a first through hole is arranged on the guide block for the upper ironing knife lifting rod to pass through, an end of the first connecting rod away from the upper ironing knife lifting rod is hinged to the eccentric block, a first synchronous pulley is arranged on the synchronous shaft, a first driving motor is arranged in the frame, a second synchronous pulley is linked to the output end of the first driving motor, and a first transmission belt is linked between the first synchronous pulley and the second synchronous pulley.

7. The heavy-packaging flying knife bag making machine according to claim 6, characterized in that: The upper ironing knife beam is provided with a limiting mechanism on the side away from the feeding direction of the packaging bag, and a cutting channel for the flying knife mechanism to move is formed between the limiting mechanism and the heat sealing mechanism. The limiting mechanism includes a plurality of second connecting rods located at the bottom of the upper ironing knife beam, one end of the second connecting rod is connected to the upper ironing knife beam, and the other end is connected to a pressure block, a second spring is wound around the outer wall of the second connecting rod, and a workbench is provided below the pressure block in the frame, and the upper end surface of the workbench can be against the pressure block.

8. The heavy-packaging flying knife bag making machine according to claim 7, characterized in that: The flying knife mechanism includes a second driving motor, the output end of the second driving motor is linked to a synchronous belt, a flying knife seat is provided on the synchronous belt, a first connecting block is provided on the flying knife seat, the first connecting block is provided with a second connecting block towards the direction close to the heat sealing mechanism, the first connecting block and the second connecting block are perpendicular to each other, a third connecting block is provided at one end of the second connecting block away from the first connecting block, the third connecting block and the second connecting block are perpendicular to each other, a flying knife is provided inside the third connecting block, and the third connecting block and the flying knife are located in the cutting channel.

9. A heavy-packaging flying knife bag making machine according to claim 1 or 2 or 3 or 4 or 5 or 8, characterized in that: The feeding mechanism includes a first conveying roller rotatably arranged in a frame, a second conveying roller is rotatably connected to the frame below the first conveying roller, and the second conveying roller is linked to the first conveying roller, a driven gear is provided at one end of the second conveying roller, a third driving motor is provided in the frame, a driving gear is provided at the output end of the third driving motor, and a second transmission belt is linked between the driving gear and the driven gear.

10. The heavy-packaging flying knife bag making machine according to claim 9, characterized in that: The first conveyor roller and the second conveyor roller are provided with an air pipe fixing seat near the feeding direction of the packaging bag, and a plurality of air pipes are extended from the air pipe fixing seat to between the first conveyor roller and the second conveyor roller. The outer walls of the first conveyor roller and the second conveyor roller are provided with a plurality of accommodating grooves for placing air supply pipes along the circumference.

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