Vacuum packaging machine with cutter

Abstract

The invention relates to the technical field of packaging equipment, in particular to a vacuum packaging machine with a cutter, which comprises a main frame, a sealing assembly and a moving assembly are arranged in the middle of the main frame, and a cutting assembly is arranged on the left side of the main frame; the sealing assembly comprises four supporting rods in the middle of the top end of the main frame, a top cover is rotationally connected between the four supporting rods, the interiors of the two supporting rods arranged at opposite angles are rotationally connected with first screws correspondingly, the two first screws are in threaded connection with the adjacent opposite angles of the top cover, and the four corners of the top cover are each slidably connected with a first sliding rod; according to the scheme, the three functional assemblies of sealing, conveying and cutting are integrated, manual transfer and independent cutting equipment are omitted, and automatic continuous operation from packaging to cutting is achieved; the sealing structure is optimized by means of the rubber air closing ring and the blade-shaped air plate, and the vacuum sealing stability is improved; by means of the rotating frame adjusted through the clamping bead-bead groove lock pin and the tension spring, disassembly and assembly of the reel are simplified, alignment of packaging rolls is guaranteed, and the defects of traditional equipment are effectively overcome.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment technology, and in particular to a vacuum packaging machine with a cutter. Background Technology

[0002] Vacuum packaging machines are commonly used equipment in the packaging technology field. They mainly work by extracting gas from the packaging and sealing it to preserve freshness, prevent moisture, and prevent oxidation of goods. They are widely used in food, electronic components, medical devices, and other fields. In actual production, traditional vacuum packaging machines often need to be used in conjunction with separate cutting equipment. After packaging, continuous packages need to be manually transferred to the cutting equipment for segmentation. This not only increases equipment investment costs and production floor space but also reduces overall production efficiency due to the time intervals caused by manual transfer.

[0003] Meanwhile, the sealing structure of traditional vacuum packaging machines has significant shortcomings: they mostly use rigid seals, which are difficult to adapt to packaging rolls with tiny wrinkles or uneven surfaces, easily creating air leakage gaps and resulting in substandard vacuum levels; moreover, they lack effective guidance for the packaging roll during vacuuming, causing the roll to easily accumulate or shift in the sealing area, further affecting the sealing effect. In addition, the installation and fixing structure of packaging rolls in traditional equipment is cumbersome, requiring tools to disassemble and assemble the rolls, which is time-consuming, and cannot precisely control the unfolding angle of the packaging roll, resulting in poor alignment of the upper and lower packaging rolls, easily causing sealing misalignment problems and affecting packaging quality.

[0004] To address this, the present invention proposes a vacuum packaging machine with a cutter. By integrating three major functional components—sealing, conveying, and cutting—it eliminates the need for manual transfer and separate cutting equipment, achieving automated continuous operation from packaging to cutting. The sealing structure is optimized using a rubber air-sealing ring and a blade-shaped air plate to improve vacuum sealing stability. Furthermore, the rotating frame, adjusted by a "bead-bead groove" locking pin and tension spring, simplifies roll assembly and disassembly and ensures packaging roll alignment, effectively solving the aforementioned shortcomings of traditional equipment. Summary of the Invention

[0005] Technical problems solved: Solving the problems of poor sealing, low efficiency and cumbersome operation of traditional vacuum packaging machines.

[0006] In view of the shortcomings of the prior art, the present invention provides a vacuum packaging machine with a cutter, thereby solving the technical problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A vacuum packaging machine with a cutter includes a main frame, a sealing component and a moving component in the middle of the main frame, and a cutting component on the left side of the main frame; The sealing assembly includes four support rods at the top center of the main frame, with a top cover rotatably connected between the four support rods. Two diagonally opposite support rods are each rotatably connected to a screw rod, which is threaded to the adjacent diagonal corners of the top cover. A sliding rod is slidably connected to each of the four corners of the top cover. A connecting frame is fixedly connected between the bottom ends of the four sliding rods. A spring is fitted on the outer side of each of the four sliding rods. Air-sealing rings are installed at the top and bottom of the connecting frame. A second connecting frame is installed at the top center of the main frame, with an air-sealing ring also installed at its top. Heating frames are installed at the top center of the main frame and the bottom of the top cover. An air pump is installed at the bottom of the main frame. An air pipe is fixedly connected to the input end of the air pump, and an air plate is fixedly connected to the end of the air pipe away from the air pump. The moving assembly includes conveyor belt one, conveyor belt two, conveyor belt three and conveyor belt four installed in the middle of the main frame; The cutting assembly includes a rotating groove on the left side of the main frame, with a screw two rotatably connected inside the rotating groove. A motor three is installed on the left side of the main frame, and the output shaft of the motor three is connected to the driving wheel of the pulley group three. The driven wheel of the pulley group three is fixed to one end of the screw two, and a cutter is threadedly connected to the outside of the screw two.

[0008] In one possible implementation, a pulley assembly is installed between the bottoms of the two screws, and a motor is installed at the bottom of the main frame, with its output end connected to the drive wheel of the pulley assembly. The top end of the spring presses against the bottom end of the top cover, and its bottom end simultaneously presses against the top end of the connecting frame.

[0009] In one possible implementation, the air-sealing ring is made of rubber, is strip-shaped, and flips outward.

[0010] In one possible implementation, a rotating frame is installed on the right side of the top cover, and a tension spring is installed on the rotating frame. One end of the tension spring is connected to the rotating frame, and the other end is fixed to the top cover. A fixing clip is provided on the rotating frame, and the fixing clip is connected to the rotating frame by a locking pin. A blocking plate is installed on the side of the top cover near the rotating frame.

[0011] In one possible implementation, the locking pin includes a locking pin that extends through the fixed locking pin and into the slot on the rotating frame. A sliding rod is slidably connected inside the locking pin. A limit plate is fixedly connected to the upper side of the sliding rod, and a pressing block is fixedly connected to the bottom end of the sliding rod. A displacement groove is provided on the lower side of the pressing block. A spring is sleeved on the outer side of the sliding rod. Multiple locking beads are movably connected around the lower side of the locking pin, and a bead groove is simultaneously provided in the middle of the slot.

[0012] In one possible implementation, a second motor is installed on one side of the main frame, and the output shaft of the second motor is connected to the rotating shafts of conveyor belt one, conveyor belt two, conveyor belt three and conveyor belt four respectively through a pulley set two, so as to realize the synchronous operation of each conveyor belt.

[0013] In one possible implementation, there are two conveyor belts, one conveyor belt, one conveyor belt, one conveyor belt, and one conveyor belt, respectively, which are arranged on the front and rear sides of the main frame.

[0014] In one possible implementation, the air plate has a flat design with blade-shaped sides.

[0015] In one possible implementation, the top of the top cover has a ventilation hole one, and the middle of the main frame has a ventilation hole two.

[0016] In one possible implementation, a rotating seat is installed at the bottom of the main frame, and two fixing clips are rotatably connected to the front and rear sides of the rotating seat, respectively. Both fixing clips are fixed to the bottom of the main frame by locking pins. A scroll is provided between the rotating frame and the first connected fixing card, and between the rotating seat and the two second fixing cards.

[0017] Beneficial effects compared to existing technologies: 1. This solution utilizes a rubber-made, side-folded air-sealing ring, combined with a flat, blade-shaped air plate, to achieve efficient sealing and stable vacuuming. The air-sealing ring deforms under compression to fill wrinkles in the packaging roll, preventing air leakage. The air plate reduces the impact of its own thickness on the fit of the packaging roll and guides the roll to unfold smoothly, preventing stacking. Simultaneously, the vacuuming area is precisely limited to the upper and lower heating frames, effectively ensuring a vacuum state within the packaging and meeting the preservation and storage needs of food, easily oxidized products, etc. 2. In this solution, a moving assembly consisting of "four layers of conveyor belts + motor two and pulley group two" is used to achieve stable and synchronous conveying of the packaging roll and the packaged item. Conveyor belt one and conveyor belt two form an opposing clamping structure, and the spacing adapted to the thickness of the packaging roll prevents both deviation and damage. Conveyor belt three and conveyor belt four work together to convey the sealed packaged item. The synchronous operation of each conveyor belt ensures smooth operation from the unfolding of the packaging roll to the delivery of the packaged item to the cutting area, thereby improving the efficiency of automated conveying. 3. In this solution, a bi-directional cutting blade is designed, combined with a drive structure consisting of screw two, a rotating groove, motor three, and pulley group three, achieving efficient continuous cutting. The cutting blade moves along screw two, limited by the rotating groove. The bi-directional cutting blade does not require separate reset; the next cut can be completed simply by reversing the motor, avoiding the time-consuming reset problem of traditional cutting blades. At the same time, the cutting direction is perpendicular to the conveyor belt's conveying direction, ensuring a flat cut cross-section and improving the quality of packaged parts and overall production efficiency. 4. In this solution, the reel is fixed by a locking pin structure with a "bead-groove" combination, and the angle of the rotating frame is adjusted by a tension spring and a stop plate, achieving convenient disassembly and assembly of the reel and precise alignment of the packaging roll. Pulling the limit plate unlocks and replaces the reel, and the friction prevents the reel from rotating arbitrarily or failing to unfold; the tension spring keeps the rotating frame at a preset angle, ensuring that the upper packaging roll is horizontally aligned with the conveyor belt, thus ensuring alignment of the upper and lower packaging rolls, laying the foundation for subsequent sealing, reducing the difficulty of manual adjustment, and improving the ease of equipment operation. Attached Figure Description

[0018] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the main frame of the present invention; Figure 3 This is a schematic diagram of the motor of the present invention; Figure 4 This is a schematic diagram of the top cover of the present invention; Figure 5 This is a schematic diagram of the connection frame of the present invention; Figure 6 This is a schematic diagram of the air vent of the present invention; Figure 7 for Figure 6 Enlarged view of point A in the image; Figure 8 This is a schematic diagram of the air plate of the present invention; Figure 9 This is a schematic diagram of the second motor of the present invention; Figure 10 This is a schematic diagram of the conveyor belt of the present invention; Figure 11 This is a schematic diagram of the rotating frame of the present invention; Figure 12 This is a schematic diagram of the fixing card of the present invention; Figure 13 This is a schematic diagram of the locking pin of the present invention; Figure 14 for Figure 3 Enlarged view of point B in the image; Figure 15 This is a schematic diagram of the motor of the present invention; Figure 16 for Figure 15 Enlarged view of point C in the image.

[0020] Legend: 1. Main frame; 2. Support rod; 3. Top cover; 4. Screw 1; 5. Motor 1; 6. Pulley assembly 1; 7. Slide rod 1; 8. Connecting frame 1; 9. Spring 1; 10. Air sealing ring; 11. Connecting frame 2; 12. Heating frame; 13. Air pump; 14. Air pipe; 15. Air plate; 16. Vent 1; 17. Vent 2; 18. Conveyor belt 1; 19. Conveyor belt 2; 20. Conveyor belt 3; 21. Conveyor belt 4; 22. Motor 2 23. Belt pulley group two; 24. Rotating frame; 25. Tension spring; 26. Fixing clip one; 27. Slot; 28. Pin; 29. ​​Slide rod two; 30. Limiting plate; 31. Extrusion block; 32. Displacement groove; 33. Bead; 34. Bead groove; 35. Fixing clip two; 36. Roller; 37. Rotating groove; 38. Screw two; 39. Motor three; 40. Belt pulley group three; 41. Cutter; 42. Spring two; 43. Stop plate; 44. Rotating seat. Detailed Implementation

[0021] Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention can also be implemented in various different forms, and therefore the present invention is not limited to the embodiments described below. In addition, for the purpose of more clearly describing the present invention, parts not connected to the invention will be omitted from the drawings. The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows: Example:

[0022] Please refer to Figures 1 to 16 As shown in the figure, this embodiment introduces the specific structure of a vacuum packaging machine with a cutter. The core structure is based on the main frame 1 and integrates three core functional components: a sealing component installed in the middle of the main frame 1 for vacuum sealing, a moving component installed in the middle of the main frame 1 for conveying the packaging roll and packaged items, and a cutting component installed on the left side of the main frame 1 to complete the cutting process after packaging. The automation process from packaging to cutting is realized through the coordinated work of each component.

[0023] The sealing assembly includes four support rods 2 installed at the top center of the main frame 1. A top cover 3 is rotatably connected between the four support rods 2. The top cover 3 has a square design, and the four support rods 2 are respectively designed at the four corners of the top cover 3. Screws 4 are rotatably connected inside the two diagonally opposite support rods 2. The two screws 4 are threadedly connected to the adjacent diagonally opposite corners of the top cover 3. A pulley set 6 is installed between the bottom of the two screws 4. The pulley set 6 interconnects the two screws 4, making them rotate simultaneously, which in turn drives the top cover 3 to move up and down between the four support rods 2. A motor 5 is installed at the bottom of the main frame 1. Its output end is connected to the drive wheel of the pulley set 6. By starting the motor 5, the pulley set 6 is driven to rotate, which in turn drives the two screws 4 to rotate simultaneously.

[0024] A sliding rod 7 is slidably connected to each of the four corners of the top cover 3. A connecting frame 8 is fixedly connected between the bottom ends of the four sliding rods 7. A spring 9 is sleeved on the outside of each of the four sliding rods 7. The top end of the spring 9 presses against the bottom end of the top cover 3, and its bottom end presses against the top end of the connecting frame 8 at the same time. Air-sealing rings 10 are installed at the top and bottom of connecting frame 18, and connecting frame 21 is installed at the top middle of the main frame 1. Air-sealing rings 10 are also installed at the top of connecting frame 21. The air-sealing rings 10 at the bottom of connecting frame 18 and the air-sealing rings 10 at the top of connecting frame 21 are symmetrically arranged. The air-sealing rings 10 are made of rubber, are strip-shaped and tilted outward. Rubber has good elasticity and deformation ability. The rubber material can adapt to the extrusion pressure and fill the small wrinkles or unevenness on the surface of the packaging roll, avoiding air leakage gaps caused by defects on the surface of the packaging roll. When the top cover 3 moves downward, it drives connecting frame 18 and the connected air-sealing rings 10 to move downward at the same time.

[0025] Heating frames 12 are installed at the top center of the main frame 1 and at the bottom of the top cover 3. The two heating frames 12 are symmetrically arranged. An air pump 13 is installed at the bottom of the main frame 1. An air pipe 14 is fixedly connected to the input end of the air pump 13. An air plate 15 is fixedly connected to the end of the air pipe 14 away from the air pump 13.

[0026] The air inlet of the air plate 15 is located between the air-sealing ring 10 at the bottom of the connecting frame 18 and the air-sealing ring 10 at the top of the connecting frame 21, and does not exceed the range of the upper and lower heating frames 12, ensuring the accuracy of the vacuuming area. When evacuating and sealing, the two packaging rolls are first moved to the space between the air-sealing ring 10 at the bottom of the connecting frame 18 and the air-sealing ring 10 at the top of the connecting frame 21, as well as the upper and lower sides of the air plate 15, by the moving component. The two air-sealing rings 10 at the bottom of the connecting frame 18 and the top of the connecting frame 21 squeeze the two packaging rolls, while clamping the air plate 15 in front of the two packaging rolls. Since the air-sealing rings 10 are made of rubber and are flexible, they will squeeze the two packaging rolls tightly against the outside of the air plate 15, and stick the two packaging rolls together. Since the packaging rolls are made of plastic, when the two air-sealing rings 10 at the bottom of the connecting frame 18 and the top of the connecting frame 21 squeeze the two packaging rolls, they can effectively prevent the outside gas from entering.

[0027] The air plate 15 has a flat design with blade-shaped sides. This design minimizes the impact of the thickness of the air plate 15 on the fit of the packaging roll, preventing gaps between packaging rolls due to excessive thickness of the air plate 15. It ensures that when the air-sealed ring 10 is compressed, the two packaging rolls can fit tightly against the surface of the air plate 15, forming a stable sealed space. At the same time, it guides the packaging roll to unfold smoothly along the blade-shaped edge and fit against the surface of the air plate 15 during the conveying process, preventing wrinkles and accumulation of the packaging roll on both sides of the air plate 15. This further prevents wrinkles from causing local gas to be unable to escape during vacuuming.

[0028] In the initial state, the top cover 3 is in the raised position. The moving component transports the two packaging rolls to the space between the connecting frame 1 8 and the connecting frame 2 11. The staff manually places the items to be packaged between the two packaging rolls. The items are placed on the lower packaging roll. At this time, the air plate 15 is located between the two packaging rolls. Start motor 5. The output shaft of motor 5 drives pulley set 6 to rotate. Pulley set 6 drives two screws 4 to rotate synchronously. Since screws 4 are threadedly connected to top cover 3, top cover 3 moves downward along four support rods 2, causing slide rod 7 and connecting frame 8 to move downward synchronously.

[0029] The airtight ring 10 at the bottom of the connecting frame 8 first contacts the upper packaging roll. As the top cover 3 continues to move downward, the airtight ring 10 at the bottom of the connecting frame 8 and the airtight ring 10 at the top of the connecting frame 11 together squeeze the upper and lower packaging rolls. Because the airtight ring 10 is made of rubber and is folded to the side, it can fit tightly against the packaging roll. At the same time, the air plate 15 is sandwiched between the two packaging rolls, effectively blocking the entry of external gas and forming a sealed space. At this time, the motor 5 stops and the top cover 3 stops moving downward.

[0030] When the air pump 13 is started, the air pump 13 extracts the gas from the two packaging rolls between the connecting frame 11 and the connecting frame 21 through the air pipe 14 and the air plate 15, so that a vacuum is formed inside the packaging rolls. The ventilation hole 16 opened at the top of the top cover 3 and the ventilation hole 27 opened on the main frame 1 are used for ventilation between the upper and lower packaging rolls and the inside of the top cover 3 and the main frame 1.

[0031] Once the vacuum condition reaches the set requirements, turn off the air pump 13 and restart the motor 5 to drive the top cover 3 to continue moving downwards until the heating frame 12 at the bottom of the top cover 3 and the heating frame 12 at the top of the main frame 1 tightly clamp the two packaging rolls in the vacuum state; then start the electric heating device inside the heating frame 12, the temperature of the heating frame 12 rises, and the contact area of ​​the packaging rolls is heat-sealed. After the sealing is completed, turn off the electric heating device.

[0032] After sealing, the starter motor 5 reverses, driving the pulley set 6 to rotate in the opposite direction, which in turn causes the two screws 4 to rotate in the opposite direction, and the top cover 3 moves upward along the support rod 2. In the initial stage of the top cover 3 moving upward, due to the rebound force of the spring 9, the connecting frame 8 remains stationary. The air-sealing rings 10 at the bottom of the connecting frame 8 and the top of the connecting frame 11 still clamp the packaging roll, preventing the package roll after heat-sealing from sticking to the heating frame 12. As the top cover 3 continues to move upward, the slide rod 7 slides in the sliding hole of the top cover 3. When the top cover 3 moves upward to a certain distance, it drives the connecting frame 8 to move upward synchronously and return to the initial position. At this time, one sealing operation is completed.

[0033] The moving assembly includes conveyor belt 18, conveyor belt 29, conveyor belt 30, and conveyor belt 41 installed in the middle of the main frame 1. There are two of each of the following conveyor belts: one 18, two 19, three 20, and four 21, which are respectively located on the front and rear sides of the main frame 1. Conveyor belt 18 is longer than conveyor belts 29, 30, and 41, extending from the cutting assembly to the right side of the sealing assembly. Conveyor belts 29, 320, and 41 are of the same length. Conveyor belt 41 is located to the left of conveyor belt 18. Conveyor belt 29 is located on the upper left side of conveyor belt 18, and conveyor belt 30 is located on the upper side of conveyor belt 29. By being arranged vertically, the packaging bag is clamped to achieve its conveying function.

[0034] Motor 22 is installed on one side of the main frame 1. The output shaft of motor 22 is connected to the rotating shafts of conveyor belt 18, conveyor belt 29, conveyor belt 30 and conveyor belt 41 respectively through pulley set 23, so as to realize the synchronous operation of each conveyor belt.

[0035] In the initial state, one end of the upper and lower packaging rolls is first moved between conveyor belt 18 and conveyor belt 29. Starting motor 22 starts all four conveyor belts. Since the lower side of conveyor belt 18 and the upper side of conveyor belt 29 have opposite transmission directions and are both to the left, they form a "opposing clamping conveyor" structure. Then, when the two packaging rolls are between conveyor belt 18 and conveyor belt 29, the upper and lower packaging rolls are respectively attached to the upper surface of conveyor belt 18 and the lower surface of conveyor belt 29. The friction generated by the operation of the conveyor belts drives the two packaging rolls to move to the left synchronously. At the same time, the vertical spacing of conveyor belt 18 and conveyor belt 29 is designed to match the thickness of the packaging rolls, forming a moderate clamping force. This prevents the packaging rolls from shifting due to loosening during transportation and also prevents the packaging rolls from being damaged or jammed due to excessive clamping. This ensures that the packaging rolls move smoothly to the left side of the main frame 1 of the cutting component.

[0036] A rotating frame 24 is installed on the right side of the top cover 3. A tension spring 25 is installed on the rotating frame 24. One end of the tension spring 25 is connected to the rotating frame 24, and the other end is fixed to the top cover 3 to keep the rotating frame 24 at a stable angle. A fixing clip 26 is installed on the rotating frame 24. The scroll 36 can be lifted by the fixing clip 26 and the rotating frame 24. The fixing clip 26 is connected to the rotating frame 24 by a locking pin. A stop plate 43 is installed on the side of the top cover 3 near the rotating frame 24. The tension spring 25 pulls the rotating frame 24 to rotate to the left. To prevent excessive displacement, the stop plate 43 restricts the rotation.

[0037] The rotating frame 24 and its auxiliary components move up and down through the top cover 3. The purpose is to move the upper packaging roll up when the top cover 3 moves up, so that a space for placing objects is formed between it and the lower packaging roll. Rubber contact surfaces are provided between the rotating frame 24, the fixing clip 26 and the scroll 36, so that they are in a close fit but not completely squeezed. The purpose is to prevent the scroll 36 from rotating back and forth between the rotating frame 24 and the fixing clip 26 through friction, and to ensure that the scroll can rotate normally through appropriate friction.

[0038] The design of the tension spring 25 avoids the tearing of the packaging roll caused by rigid pulling, and the tension of the tension spring 25 can keep the rotating frame 24 stably in contact with the stop plate 43 at a preset angle. This angle allows the upper packaging roll to be precisely aligned with the conveyor belt 19 in a horizontal posture after it is unrolled from the roll 36. This prevents the packaging roll from tilting or getting stuck due to the unrolling angle being too large or too small, and ensures precise alignment with the lower packaging roll, laying the foundation for subsequent sealing operations.

[0039] The locking pin includes a locking pin 28, which extends through the fixed locking pin 26 and into the slot 27 on the rotating frame 24. A sliding rod 29 is slidably connected inside the locking pin 28. A limit plate 30 is fixedly connected to the upper side of the sliding rod 29 to limit the sliding range of the sliding rod 29 inside the locking pin 28. A pressing block 31 is fixedly connected to the bottom end of the sliding rod 29. A displacement groove 32 is opened on the lower side of the pressing block 31. A spring 42 is sleeved on the outer side of the sliding rod 29. Multiple locking beads 33 are movably connected around the lower side of the locking pin 28. A bead groove 34 is simultaneously opened in the middle of the slot 27.

[0040] When it is necessary to fix the scroll 36 to the rotating frame 24, first pull the limiting plate 30 upward, causing the slide bar 29 to slide upward along the inside of the locking pin 28. At this time, the spring 42 on the outside of the slide bar 29 is compressed, and the pressing block 31 at the bottom of the slide bar 29 moves upward. The displacement groove 32 on the lower side of the pressing block 31 disengages from the locking bead 33 on the lower side of the locking pin 28. The locking bead 33 loses the limiting constraint of the pressing block 31 and can freely retract into the locking pin 28.

[0041] The two ends of the roll 36 with the upper packaging roll are placed on the rotating frame 24. The roll 36 is fixed by the fixing clip 26, so that the arc-shaped contact surface of the fixing clip 26 is in contact with the rubber layer on the outside of the roll 36. At the same time, it is ensured that the locking pin 28 is aligned with the locking groove 27 on the rotating frame 24. After the locking pin 28 is inserted into the locking groove 27 through the fixing clip 26, the limiting plate 30 is released. The spring 42 releases its elastic potential energy and pushes the slide rod 29 to return to its original position. The squeezing block 31 moves down and squeezes the locking bead 33, forcing the locking bead 33 to pop out of the locking pin 28 and finally embed into the bead groove 34 in the middle of the locking groove 27. At this time, the locking bead 33 is limited by the squeezing block 31. At the same time, the movement of the locking pin 28 in the locking groove 27 is restricted by the cooperation between the locking bead 33 and the bead groove 34. Thus, the fixing clip 26 and the rotating frame 24 are firmly locked. The roll 36 is clamped by the fixing clip 26 and the rotating frame 24, and the fixing operation is completed.

[0042] Similarly, a rotating seat 44 is installed at the bottom of the main frame 1. Two fixing clips 35 are rotatably connected to the front and rear sides of the rotating seat 44. Both fixing clips 35 are fixed to the bottom of the main frame 1 by locking pins. The lower roller 36 is installed by the cooperation between the main frame 1 and the fixing clips 35. At the same time, the fixing clips 35 can be quickly opened by the use of locking pins to replace the roller 36.

[0043] The cutting assembly is located between conveyor belt 18 and conveyor belt 21. The core component includes a rotating groove 37, and a screw 38 is rotatably connected inside the rotating groove 37. The axis of the screw 38 is perpendicular to the conveying direction of the conveyor belt. A motor 39 is installed on the left side of the main frame 1 at the position corresponding to the cutting area. The output shaft of the motor 39 is connected to the driving wheel of the pulley group 30, and the driven wheel of the pulley group 30 is fixed to one end of the screw 38.

[0044] A cutter 41 is threadedly connected to the outer side of the screw 38. The cutter 41 moves inside the rotating groove 37. The cutter 41 is flat and cannot rotate with the screw 38 due to the restriction of the rotating groove 37. Instead, it moves back and forth along the rotating groove 37.

[0045] The cutter 41 has a double-edged blade. After vacuum heat sealing, the packaging bag is moved to the middle of the two side conveyor belts 18 and 19 by the first and second conveyor belts. With the continued conveying of the first and second conveyor belts 18 and 19, the left end of the packaging roll enters the conveying range of the third and fourth conveyor belts 20 and 21. When the left end of the packaging roll moves between the third and fourth conveyor belts 20 and 21, it is subjected to the squeezing force of the two belts and continues to move to the left until the packaged part moves between the front and rear side conveyor belts 20. The cutting assembly is located between conveyor belt 18 and conveyor belt 21. At this time, motor 39 is started. The output shaft of motor 39 drives the drive wheel of pulley group 40 to rotate. Through belt transmission, the driven wheel rotates synchronously, thereby driving screw 2 38 to rotate clockwise in the rotating groove 37. The rotation connection between screw 41 and rotating groove 37 is as follows: Since the cutter 41 is threadedly connected to screw 2 38, and the inner wall of rotating groove 37 limits the forward and backward movement of cutter 41, cutter 41 moves backward along the axis of screw 2 38, thereby cutting the packaging bag.

[0046] Since the cutter 41 has a two-way blade design, it does not need to be reset. When the next packaged item moves between the front and rear conveyor belts 20, the cutter 41 moves in the opposite direction to perform subsequent cutting by reversing the start motor 39. This process is repeated.

[0047] In summary, the entire workflow is as follows: Installation of the upper roll 36: Pull the locking pin limiting plate 30 of the fixing clip 26 upwards, compress the spring 42 to retract the locking bead 33, open the fixing clip 26, place the roll 36 with the upper packaging roll inside the support groove of the rotating frame 24, close the fixing clip 26, release the limiting plate 30, and the locking bead 33 will be locked into the bead groove 34. The tension spring 25 pulls the rotating frame 24 to fit against the blocking plate 43, so that the unfolded end of the upper packaging roll is horizontally aligned with the conveyor belt 19.

[0048] Installation of the lower roll 36: Similarly, operate the fixing clip 35 on the bottom rotating seat 44 of the main frame 1 to fix the lower packaging roll 36, and make the unfolded end fit against the upper surface of the conveyor belt 18 to ensure that the upper and lower packaging rolls are aligned.

[0049] When the staff places the items to be packaged on the lower packaging roll, motor 5 starts, pulley group 6 drives screw 4 to rotate, top cover 3 moves down along support rod 2, air seal ring 10 at the bottom of connecting frame 8 first contacts the upper packaging roll, and after continuing to move down, it squeezes the upper and lower packaging rolls together with air seal ring 10 at the top of connecting frame 11. The rubber air seal ring 10 deforms, fills the folds of the packaging roll, and forms a closed space. At the same time, air plate 15 is sandwiched between the two packaging rolls.

[0050] The vacuum pump 13 is started to extract gas from the enclosed space through the air pipe 14 and the air plate 15. After the vacuum level is reached, the air pump 13 is turned off.

[0051] The heat-sealing and reset motor 5 restarts, the top cover 3 continues to move downwards, and the upper and lower heating frames 12 clamp the sealing area of ​​the packaging roll. The electric heating device starts, and the heat-sealing packaging roll is sealed. After sealing, motor 5 reverses, the top cover 3 moves upwards, and spring 9 pushes connecting frame 8 to maintain the clamping state, preventing the packaging roll from sticking to the heating frame 12, until the top cover 3 moves to the initial position, and motor 22 resumes operation.

[0052] After sealing, the packaged item is conveyed to the cutting area. The sealed packaged item moves to the left along with conveyor belt 18 and conveyor belt 41. When the left end of the packaged item enters the clamping range of conveyor belt 30 and conveyor belt 41, the two convey together to stably deliver the packaged item to the top of the cutting component trough 37, and motor 22 stops.

[0053] When the motor 39 is started, the pulley group 30 drives the screw 2 38 to rotate clockwise. The cutter 41 cannot rotate due to the limit of the rotating groove 37, and moves backward along the screw 2 38. The front blade cuts off the edge material of the package. After the cutting is completed, there is no need for the cutter 41 to reset. After the next package is in place, the motor 39 reverses, the screw 2 38 rotates counterclockwise, the cutter 41 moves forward, and the rear blade can simultaneously cut off the edge material of the next package, realizing the continuous operation of "cutting-resetting-recutting".

[0054] After cutting is completed, motor 22 starts, and conveyor belts 3 and 4 transport the finished packaged parts to the collection box on the left side of the equipment to avoid accumulation and to facilitate the next cutting operation.

[0055] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A vacuum packaging machine with a cutting knife, comprising a main frame (1), characterized in that, The middle part of the main frame (1) is provided with a sealing assembly and a moving assembly, and the left side of the main frame (1) is provided with a cutting assembly; The sealing assembly comprises four supporting rods (2) in the middle part of the top end of the main frame (1), a top cover (3) rotatably connected between the four supporting rods (2), screw rods (4) rotatably connected to the inner parts of the opposite two supporting rods (2), respectively, the two screw rods (4) being threadedly connected to the adjacent opposite corners of the top cover (3), one sliding rod (7) slidingly connected to each of the four corners of the top cover (3), a connecting frame (8) fixedly connected between the bottom ends of the four sliding rods (7), a spring (9) sleeved on the outer side of each of the four sliding rods (7), an air closing ring (10) mounted on the top end and the bottom end of the connecting frame (8), respectively, a connecting frame (11) mounted on the top end of the middle part of the main frame (1), the top end of the connecting frame (11) also being provided with an air closing ring (10), and a heating frame (12) mounted on the top end of the middle part of the main frame (1) and the bottom end of the top cover (3). The bottom end of the main frame (1) is provided with an air pump (13), the input end of the air pump (13) is fixedly connected with an air pipe (14), and the end, away from the air pump (13), of the air pipe (14) is fixedly connected with an air plate (15). The moving assembly comprises a conveying belt (18), a conveying belt (19), a conveying belt (20) and a conveying belt (21) mounted on the middle part of the main frame (1). The cutting assembly comprises a rotating groove (37) arranged on the left part of the main frame (1), a screw rod (38) rotatably connected in the rotating groove (37), a motor (39) mounted on the left side of the main frame (1), a driving pulley (40) connected to the output shaft of the motor (39), a driven pulley (40) fixedly connected to one end of the screw rod (38), and a cutter (41) threadedly connected to the outer side of the screw rod (38).

2. A vacuum packaging machine with a cutter as claimed in claim 1, characterized in that The bottom parts of the two screw rods (4) are provided with a pulley set (6), and the bottom part of the main frame (1) is provided with a motor (5) with the output end connected to the driving pulley of the pulley set (6). The top end of the spring (9) extrudes the bottom end of the top cover (3), and the bottom end of the spring (9) extrudes the top end of the connecting frame (8) at the same time.

3. A vacuum packaging machine with a cutter as claimed in claim 1, characterized in that, The air closing ring (10) is made of rubber material and designed in a strip shape and inclined outward.

4. A vacuum packaging machine with a cutter as claimed in claim 1, characterized in that, The right side of the top cover (3) is provided with a rotating frame (24), a tension spring (25) is mounted on the rotating frame (24), one end of the tension spring (25) is connected to the rotating frame (24), the other end is fixed to the top cover (3), the rotating frame (24) is provided with a fixed clamp (26) connected to the rotating frame (24) through a lock pin, and the side, close to the rotating frame (24), of the top cover (3) is provided with a stop plate (43).

5. A vacuum packaging machine with a cutter as claimed in claim 4, characterized in that The locking pin comprises a latch (28) extending through the fixed card I (26) to the inside of the card slot (27) on the rotating frame (24), the inside of the latch (28) is slidably connected with a sliding rod II (29), the upper side of the sliding rod II (29) is fixedly connected with a limiting plate (30), the bottom end of the sliding rod II (29) is fixedly connected with an extrusion block (31), the lower side of the extrusion block (31) is provided with a displacement slot (32), the outer side of the sliding rod II (29) is sleeved with a spring II (42), the lower side of the latch (28) is movably connected with a plurality of latch beads (33), and the middle part of the card slot (27) is synchronously provided with a bead groove (34).

6. A vacuum packaging machine with a cutter as claimed in claim 1, characterized in that The main frame (1) is provided with a motor II (22) on one side, the output shaft of the motor II (22) is drivingly connected with the rotating shafts of the conveying belts I (18), II (19), III (20) and IV (21) through a belt pulley set II (23), so that the conveying belts are synchronously operated.

7. A vacuum packaging machine with a cutter as claimed in claim 1, characterized in that, The conveying belts I (18), II (19), III (20) and IV (21) are provided in pairs on the front and rear sides of the main frame (1).

8. A vacuum packaging machine with a cutter as defined in claim 1, characterized in that The air plate (15) is designed in a flat shape, and the two sides thereof are designed in a blade shape.

9. A vacuum packaging machine with a cutter as defined in claim 1, characterized in that The top end of the top cover (3) is provided with a ventilation hole I (16), and the middle part of the main frame (1) is provided with a ventilation hole II (17).

10. A vacuum packaging machine with a cutter as claimed in claim 4, characterized in that, The bottom of the main frame (1) is provided with a rotating seat (44), the front and rear sides of the rotating seat (44) are rotatably connected with two fixed cards II (35), and the two fixed cards II (35) are fixed on the bottom of the main frame (1) through the locking pin. The rotating frame (24) and the fixed card I (26) connected therewith, and the rotating seat (44) and the two fixed cards II (35) are provided with reels (36).

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