Four-side powder packaging machine integrating negative pressure dust removal and recovery

Abstract

The invention relates to the technical field of powder packaging, and discloses a negative pressure dust removal and recovery integrated quadrilateral powder packaging machine which comprises a material conveying unit, a bag making and forming unit, a bag pressing mechanism and a negative pressure dust removal mechanism. According to the packaging machine, the negative pressure pipe extending into the material conveying nozzle and the bag pressing roller for clamping the packaging bag on the surface of the material conveying nozzle are arranged, the bag pressing roller clamps the upper opening of the packaging bag, so that a relatively closed space is formed in the packaging bag, powder overflowing is reduced, redundant air and raised powder in the bag are discharged through the negative pressure pipe, and the packaging efficiency is improved. Through the combined action of the bag pressing mechanism and the negative pressure dust removal mechanism, the negative pressure dust removal and recovery functions are achieved, the function of adapting to the material filling rhythm is achieved, material filling and dust removal are conducted in a peak shifting mode, and ordered operation of the system is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of powder packaging technology, and in particular to a four-sided powder packaging machine that integrates negative pressure dust removal and recycling. Background Technology

[0002] The four-sided powder packaging machine is an automated packaging equipment designed for powder materials. Its core lies in the high-precision metering of customized screws and four-sided heat sealing forming technology to achieve efficient packaging of free-flowing powder materials, such as powder packaging for food, pharmaceuticals, and chemicals.

[0003] In the prior art, patent document CN114030689B discloses a powder packaging machine, including a bagging mechanism, a storage bin, and a powder metering feeder. The powder metering feeder includes a housing, a rotating drum, a groove depth adjusting component, and a rotary driver. The powder metering feeder is provided with an inlet groove and an outlet groove. The inlet groove is connected to the outlet of the storage bin, and the outlet groove is connected to the inlet of the bagging mechanism. The rotating drum is rotatably mounted in the housing in a horizontal direction. Grooves are evenly arranged circumferentially on the outer circumferential surface of the rotating drum. The grooves extend axially along the rotating drum, and the groove depth is adjustable. The groove depth adjusting component is located in the rotating drum and is used to adjust the distance between the bottom of the groove and the axis of the rotating drum. The rotary driver is located outside the housing and is used to drive the rotating drum to rotate. By rotating the rotating drum with the adjustable groove depth in the housing, the groove depth of the groove located in the outlet groove is reduced by the rotary driver, so as to facilitate the rapid and complete discharge of powder from the outlet groove.

[0004] During the packaging process, powder falls into the bag, causing powder to be thrown up. This thrown up powder spreads to the outside through the gap between the packaging bag and the feeding nozzle, resulting in material waste and pollution. Since the packaging bag is movable, the bag opening cannot form a closed space when filling, and the powder inside the bag is scattered everywhere with the airflow, making recovery difficult. Therefore, existing powder packaging machines have the problem of not being able to recover the thrown up powder, which brings many inconveniences to use and urgently needs to be solved. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that existing powder packaging machines are inconvenient to collect the powder that is thrown up, and to propose a four-sided powder packaging machine that integrates negative pressure dust removal and collection.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a four-sided powder packaging machine integrating negative pressure dust removal and recycling, comprising:

[0007] The material conveying unit includes a frame, in which a discharge hopper, a buffer silo, and a drive unit are fixedly installed. The buffer silo is fixedly installed at the bottom port of the discharge hopper, and a conveying nozzle is fixedly installed at the discharge end of the buffer silo. A metering screw is rotatably installed inside the buffer silo, and the drive unit drives the metering screw to rotate and convey the material into the conveying nozzle.

[0008] The bag forming unit includes a front box, on which the front side of the frame is fixedly installed. A film feeding frame is provided on the upper side of the front box. A vertical sealing assembly and a horizontal sealing and cutting assembly are provided on the front side of the front box. The bottom end of the feeding nozzle passes through the vertical sealing assembly. After the film roll on the film feeding frame is unrolled, it covers the surface of the feeding nozzle to form a packaging bag. The packaging bag is sealed on all four sides by the vertical sealing assembly and the horizontal sealing and cutting assembly.

[0009] The bag pressing mechanism includes two bag pressing rollers and a first servo motor. The first servo motor drives the bag pressing rollers to rotate. The two bag pressing rollers are arranged on both sides of the feeding nozzle and clamp the packaging bag on the surface of the feeding nozzle.

[0010] The negative pressure dust removal mechanism includes a negative pressure pipe and a negative pressure generator. The negative pressure pipe is fixedly connected to the feeding nozzle, and the bottom end of the negative pressure pipe extends to the lower port of the feeding nozzle. The end of the negative pressure pipe away from the feeding nozzle is connected to the negative pressure generator. The bag pressing roller clamps the upper opening of the packaging bag, so that a relatively closed space is formed inside the packaging bag, reducing the spillage of powder and facilitating negative pressure dust removal.

[0011] Preferably, a mounting base is fixedly installed inside the front housing, and two sliding blocks are slidably installed inside the mounting base. The two bag-pressing rollers are respectively rotatably installed on the front side of the two sliding blocks. A first servo motor is fixedly installed on the rear side of each of the two sliding blocks. A return spring is provided inside the mounting base to press the two sliding blocks together. The surface of the bag-pressing roller is provided with an annular groove and a smooth clamping part. The annular groove matches the surface of the feeding nozzle. The two bag-pressing rollers are clamped to both sides of the packaging bag by the smooth clamping part, reducing the gap between the packaging bag and the feeding nozzle and reducing dust pollution.

[0012] Preferably, the cross-section of the bag-pressing roller is elliptical. When the two bag-pressing rollers rotate in opposite directions, the axes of the two bag-pressing rollers alternately move away from each other and closer to each other, causing the two sliding blocks to move away from each other or closer to each other.

[0013] The negative pressure generator is a telescopic airbag. Both ends of the negative pressure generator are fixedly connected to the two sliding blocks. An air inlet and an air outlet are fixedly installed on the upper and lower sides of the negative pressure generator, respectively. A one-way valve is installed inside the air inlet and the air outlet. The end of the negative pressure pipe away from the conveying nozzle is connected to the air inlet. The negative pressure dust removal mechanism also includes a cyclone dust collector. The air outlet is connected to the cyclone dust collector through a pipe. The rotation of the pressure bag roller provides power to the negative pressure generator, realizing the function of dust recycling.

[0014] During the rotation of the bag-pressing roller, when the long axis of the bag-pressing roller changes from horizontal to vertical, the negative pressure generator is compressed and exhausts gas into the cyclone dust collector, while the feeding nozzle fills the packaging bag with material. When the long axis of the bag-pressing roller changes from vertical to horizontal, the negative pressure generator is stretched and draws the dust raised inside the packaging bag into the negative pressure generator, thus achieving staggered filling and dust removal to ensure the orderly operation of the system.

[0015] Preferably, the bottom end of the cyclone dust collector is connected to the buffer silo, the upper opening of the cyclone dust collector is provided with a filter bag, and a support spring is provided inside the filter bag. A double helical feeding screw is rotatably installed inside the buffer silo, and the drive unit drives the double helical feeding screw to rotate, so that the material in the unloading hopper and the cyclone dust collector enters the buffer silo.

[0016] Preferably, the vertical sealing assembly includes two sets of sealing wheels, which are symmetrically arranged on both sides of the feeding nozzle. Each set of sealing wheels has two coaxially arranged roller structures. A second servo motor is installed in the front box to drive the sealing wheels to rotate. The surface of the sealing wheels is provided with anti-slip grooves. An electric heater is provided on the front side of the front box to heat the sealing wheels. Through the rotation and heat pressing of the sealing wheels, the vertical edge of the packaging bag is sealed, and the packaging bag is driven to move downward to control the length of the packaging bag.

[0017] The present invention has the following beneficial effects:

[0018] 1. The packaging machine proposed in this invention, by setting a negative pressure pipe extending into the feeding nozzle and setting a bag-pressing roller that clamps the packaging bag on the surface of the feeding nozzle, clamps the upper opening of the packaging bag, so that a relatively closed space is formed inside the packaging bag, reducing the overflow of powder. The negative pressure pipe is used to remove excess air and dust from inside the bag, further reducing the probability of powder drifting and overflowing with the air, thereby achieving the effect of negative pressure dust removal.

[0019] 2. The packaging machine proposed in this invention uses elliptical bag-pressing rollers. When the two bag-pressing rollers rotate in opposite directions, their axes alternately move away from and towards each other, causing the two sliding blocks to move away from or towards each other. This action works on the negative pressure generator. When the negative pressure generator is stretched, it draws in dust raised inside the packaging bag through the negative pressure pipe. When the negative pressure generator is compressed, it transports the collected dust to a cyclone dust collector. The powder that settles in the cyclone dust collector is then reintroduced into the buffer silo for bagging, thus achieving the effect of dust recycling.

[0020] 3. The packaging machine proposed in this invention uses an elliptical bag-pressing roller. Every half-turn of the bag-pressing roller completes one stretching and compression of the negative pressure generator, which drives the air and powder in the negative pressure pipe into the cyclone dust collector. This shortens the residence time of the powder in the negative pressure generator, avoids powder settling and accumulation that could lead to blockage of the pipeline and the negative pressure generator, and maintains the stable operation of the dust removal and recycling functions.

[0021] 4. The packaging machine proposed in this invention, through the combined action of the bag pressing mechanism and the negative pressure dust removal mechanism, not only has the functions of negative pressure dust removal and recycling, but also has the function of adapting to the filling rhythm;

[0022] It should be noted that when filling the packaging bag with powder, if the dust inside the bag is simultaneously sucked out, the material will be sucked away as well, resulting in insufficient filling and increasing the burden of dust removal and recycling. In this invention, during the process of the bag pressing roller's long axis rotating from horizontal to vertical, the feeding nozzle fills the packaging bag with material. During this process, the negative pressure generator is being compressed, that is, the dust and air inside the negative pressure generator are forced into the cyclone dust collector. When the bag pressing roller's long axis rotates from vertical to horizontal, the packaging bag moves downward, the distance between the material inside the bag and the negative pressure pipe increases, the negative pressure generator is stretched, and the dust raised inside the bag is sucked into the negative pressure generator. This cycle is repeated to achieve staggered filling and dust removal, ensuring the orderly operation of the system. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the packaging machine proposed in this invention;

[0024] Figure 2 This is a partial cross-sectional three-dimensional structural diagram of the packaging machine proposed in this invention;

[0025] Figure 3 This is a partial cross-sectional side view of the packaging machine proposed in this invention;

[0026] Figure 4 This is a three-dimensional structural diagram of the transverse edge sealing and cutting assembly proposed in this invention;

[0027] Figure 5This is a three-dimensional structural diagram of the vertical edge sealing component proposed in this invention;

[0028] Figure 6 This is a three-dimensional schematic diagram of the internal structure of the mounting base proposed in this invention;

[0029] Figure 7 This is a partial cross-sectional three-dimensional structural diagram of the feed nozzle proposed in this invention;

[0030] Figure 8 This is a planar schematic diagram of the negative pressure generator proposed in this invention;

[0031] Figure 9 This is a schematic diagram of the powder bagging process of the packaging machine proposed in this invention.

[0032] In the diagram: 1. Unloading hopper, 2. Buffer silo, 3. Drive unit, 4. Feeding nozzle, 5. Metering screw, 6. Front housing, 7. Film feeder, 8. Vertical sealing assembly, 9. Horizontal sealing and cutting assembly, 10. Packaging bag, 11. Bag pressing roller, 12. First servo motor, 13. Negative pressure pipe, 14. Negative pressure generator, 15. Mounting base, 16. Sliding block, 17. Return spring, 18. Annular groove, 19. Smooth clamping part, 20. Air inlet connector, 21. Air outlet connector, 22. One-way valve, 23. Cyclone dust collector, 24. Filter bag, 25. Double spiral feeding screw, 26. Sealing wheel, 27. Second servo motor, 28. Electric heater. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Reference Figure 1 A four-sided powder packaging machine integrating negative pressure dust removal and recycling includes: a material conveying unit, a bag forming unit, a bag pressing mechanism, and a negative pressure dust removal mechanism.

[0036] See details Figure 2 , Figure 3The material conveying unit includes a frame, in which a discharge hopper 1, a buffer silo 2, and a drive unit 3 are fixedly installed. The buffer silo 2 is fixedly installed at the bottom port of the discharge hopper 1. A conveying nozzle 4 is fixedly installed at the discharge end of the buffer silo 2. A metering screw 5 is rotatably installed inside the buffer silo 2. The drive unit 3 drives the metering screw 5 to rotate and convey the material into the conveying nozzle 4.

[0037] See details Figure 2 , Figure 3 The bag forming unit includes a front box 6, the front box 6 is fixedly installed on the front side of the frame, the upper side of the front box 6 is provided with a film feeding frame 7, the front side of the front box 6 is provided with a vertical sealing assembly 8 and a horizontal sealing and cutting assembly 9, the bottom end of the feeding nozzle 4 passes through the vertical sealing assembly 8, and the film roll on the film feeding frame 7 unfolds and covers the surface of the feeding nozzle 4 to form a packaging bag 10.

[0038] Among them, reference Figure 5 The vertical sealing assembly 8 includes two sets of sealing wheels 26, which are symmetrically arranged on both sides of the feeding nozzle 4. Each set of sealing wheels 26 has two coaxially arranged roller structures. A second servo motor 27 is installed inside the front housing 6 to drive the sealing wheels 26 to rotate. The surface of the sealing wheels 26 is provided with anti-slip grooves. An electric heater 28 is installed on the front side of the front housing 6 to heat the sealing wheels 26. Through the rotation and heat pressure of the sealing wheels 26, the vertical edge of the packaging bag 10 is sealed, and the packaging bag 10 is driven to move downward, controlling the length of the packaging bag 10. (Reference) Figure 4 The horizontal sealing and cutting component 9 has a sealing heat clamp and a cutting blade. After the sealing heat clamp seals the packaging bag 10, the cutting blade cuts off the seal. The horizontal sealing and cutting component 9 is a conventional setting in the prior art and will not be described in detail here. The packaging bag 10 is sealed on all four sides by the vertical sealing component 8 and the horizontal sealing and cutting component 9.

[0039] refer to Figure 6 The bag pressing mechanism includes two bag pressing rollers 11 and a first servo motor 12. The first servo motor 12 drives the bag pressing rollers 11 to rotate. The two bag pressing rollers 11 are arranged on both sides of the feeding nozzle 4, and the two bag pressing rollers 11 clamp the packaging bag 10 on the surface of the feeding nozzle 4. Specifically, a mounting base 15 is fixedly installed in the front box 6. Two sliding blocks 16 are slidably installed in the mounting base 15. The two bag pressing rollers 11 are respectively rotatably installed on the front side of the two sliding blocks 16. The first servo motor 12 is fixedly installed on the rear side of the two sliding blocks 16. A return spring 17 is provided in the mounting base 15 to press the two sliding blocks 16 in the middle.

[0040] refer to Figure 6 , Figure 7The negative pressure dust removal mechanism includes a negative pressure pipe 13 and a negative pressure generator 14. The negative pressure pipe 13 is fixedly connected to the feeding nozzle 4. The bottom end of the negative pressure pipe 13 extends to the lower port of the feeding nozzle 4. The end of the negative pressure pipe 13 away from the feeding nozzle 4 is connected to the negative pressure generator 14.

[0041] The packaging machine proposed in this invention, by setting a negative pressure pipe 13 extending into the feeding nozzle 4, and setting a bag-pressing roller 11 that rolls and clamps the packaging bag 10 on the surface of the feeding nozzle 4, the bag-pressing roller 11 clamps the upper opening of the packaging bag 10, so that a relatively closed space is formed inside the packaging bag 10, reducing the overflow of powder. The negative pressure pipe 13 is used to remove excess air and dust raised in the bag, further reducing the probability of powder drifting and overflowing with the air, thereby achieving the effect of negative pressure dust removal.

[0042] In this embodiment, reference Figure 6 The surface of the bag pressing roller 11 is provided with an annular groove 18 and a smooth clamping part 19. The annular groove 18 matches the surface of the feeding nozzle 4. The two bag pressing rollers 11 are clamped on both sides of the packaging bag 10 by the smooth clamping part 19.

[0043] The cross-section of the bag pressing roller 11 is elliptical. When the two bag pressing rollers 11 rotate towards each other, the axes of the two bag pressing rollers 11 alternately move away from each other and closer to each other, which drives the two sliding blocks 16 to move away from each other or closer to each other.

[0044] refer to Figure 6 , Figure 8 The negative pressure generator 14 is a telescopic airbag. Both ends of the negative pressure generator 14 are fixedly connected to two sliding blocks 16 respectively. An air inlet connector 20 and an air outlet connector 21 are fixedly installed on the upper and lower sides of the negative pressure generator 14 respectively. A one-way valve 22 is provided inside the air inlet connector 20 and the air outlet connector 21. The end of the negative pressure pipe 13 away from the feed nozzle 4 is connected to the air inlet connector 20.

[0045] refer to Figure 3 , Figure 8 The negative pressure dust removal mechanism also includes a cyclone dust collector 23. The outlet connector 21 is connected to the cyclone dust collector 23 via a pipe. The bottom end of the cyclone dust collector 23 is connected to the buffer silo 2. A filter bag 24 is installed at the upper opening of the cyclone dust collector 23, and a support spring is installed inside the filter bag 24. A double-helix feeding screw 25 is rotatably installed inside the buffer silo 2. The drive unit 3 drives the double-helix feeding screw 25 to rotate. (See details...) Figure 3 The surface of the double-helix feeding screw 25 has two sections of helical blades with opposite helical directions. One helical blade extends into the discharge hopper 1, and the other helical blade is set at the lower port of the cyclone dust collector 23. When the double-helix feeding screw 25 rotates, it pushes the material in the discharge hopper 1 and the cyclone dust collector 23 into the buffer silo 2.

[0046] See Figure 9 Figure a shows that the sealing wheels 26 on both sides clamp the packaging bag 10 to seal it vertically. The sealing wheels 26 and the bag pressing roller 11 rotate to pull the packaging bag 10 down, and the feeding nozzle 4 fills the packaging bag 10 with materials.

[0047] Figures a through b show that the transverse sealing and cutting assembly 9 horizontally seals and cuts the packaging bag 10. At this time, the axes of the two bag-pressing rollers 11 are close to each other. Simultaneously, refer to... Figure 8 The sliding blocks 16 on both sides also approach each other, compressing the negative pressure generator 14. The air pressure inside the negative pressure generator 14 increases, and the one-way valve 22 on the lower side opens. The air and dust raised inside the negative pressure generator 14 are injected into the cyclone dust collector 23.

[0048] Figures b through c show that the axes of the two bag-pressing rollers 11 are moving away from each other. (Refer to...) Figure 8 The sliding blocks 16 on both sides also move away from each other, the negative pressure generator 14 is stretched, the air pressure inside the negative pressure generator 14 drops, the one-way valve 22 on the upper side opens, and the dust raised inside the packaging bag 10 is sucked in through the negative pressure pipe 13. The air and the raised powder are sucked into the negative pressure generator 14.

[0049] The packaging machine proposed in this invention uses elliptical bag-pressing rollers 11. When the two bag-pressing rollers 11 rotate in opposite directions, their axes alternately move away from and towards each other, causing the two sliding blocks 16 to move away from or towards each other. This action puts work on the negative pressure generator 14. When the negative pressure generator 14 is stretched, it draws in the dust raised inside the packaging bag 10 through the negative pressure pipe 13. When the negative pressure generator 14 is compressed, it transports the collected dust to the cyclone dust collector 23. The powder that settles in the cyclone dust collector 23 is then reintroduced into the buffer silo 2 for bagging, thus achieving the effect of dust recycling.

[0050] In this embodiment, the process of the bag-pressing roller 11 rotating, when the long axis of the bag-pressing roller 11 changes from horizontal to vertical (e.g. Figure 9 (As shown in Figures a→b), the negative pressure generator 14 is compressed and exhausts into the cyclone dust collector 23, while the material conveying nozzle 4 fills the packaging bag 10 with material; the process of the bag pressing roller 11 rotating from vertical to horizontal (as shown in Figures a→b) Figure 9 As shown in Figures b to c), the negative pressure generator 14 is stretched, drawing the dust raised inside the packaging bag 10 into the negative pressure generator 14.

[0051] It should be noted that when filling the packaging bag 10 with powder, if the dust inside the bag is simultaneously sucked out, the material will be sucked away as well, resulting in insufficient filling and increasing the burden of dust removal and recycling. In this invention, during the process of the bag-pressing roller 11 rotating from horizontal to vertical, the feeding nozzle 4 fills the packaging bag 10 with material. During this process, the negative pressure generator 14 is being compressed, that is, the dust and air inside the negative pressure generator 14 are forced into the cyclone dust collector 23. During the process of the bag-pressing roller 11 rotating from vertical to horizontal, the packaging bag 10 moves downward, increasing the distance between the material inside the bag and the negative pressure pipe 13 (e.g., ...). Figure 9 As shown in Figure C), the negative pressure generator 14 is stretched, drawing the dust raised inside the bag into the negative pressure generator 14. This cycle repeats, achieving staggered filling and dust removal to ensure the orderly operation of the system.

[0052] The packaging machine proposed in this invention, through the combined action of the bag pressing mechanism and the negative pressure dust removal mechanism, not only has the functions of negative pressure dust removal and recycling, but also has the function of adapting to the filling rhythm. Every half rotation of the bag pressing roller 11 completes one stretching and compression of the negative pressure generator 14, that is, drives the air and powder in the negative pressure pipe 13 into the cyclone dust collector 23, shortens the residence time of powder in the negative pressure generator 14, avoids powder settling and accumulation leading to blockage of the pipeline and the negative pressure generator 14, and maintains the stable operation of the dust removal and recycling functions.

[0053] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A four-sided powder packaging machine integrating negative pressure dust removal and recycling, characterized in that, include: The material conveying unit includes a frame, in which a discharge hopper (1), a buffer silo (2), and a drive unit (3) are fixedly installed. The buffer silo (2) is fixedly installed at the bottom port of the discharge hopper (1). A conveying nozzle (4) is fixedly installed at the discharge end of the buffer silo (2). A metering screw (5) is rotatably installed inside the buffer silo (2). The drive unit (3) drives the metering screw (5) to rotate and convey the material into the conveying nozzle (4). The bag forming unit includes a front box (6), the front box (6) is fixedly installed on the front side of the frame, the upper side of the front box (6) is provided with a film feeding frame (7), the front side of the front box (6) is provided with a vertical sealing assembly (8) and a horizontal sealing and cutting assembly (9), the bottom end of the feeding nozzle (4) passes through the vertical sealing assembly (8), the film roll on the film feeding frame (7) unfolds and covers the surface of the feeding nozzle (4) to form a packaging bag (10), and the packaging bag (10) is sealed on all four sides by the vertical sealing assembly (8) and the horizontal sealing and cutting assembly (9); The bag pressing mechanism includes two bag pressing rollers (11) and a first servo motor (12). The first servo motor (12) drives the bag pressing rollers (11) to rotate. The two bag pressing rollers (11) are arranged on both sides of the feeding nozzle (4), and the two bag pressing rollers (11) clamp the packaging bag (10) on the surface of the feeding nozzle (4). The negative pressure dust removal mechanism includes a negative pressure pipe (13) and a negative pressure generator (14). The negative pressure pipe (13) is fixedly connected to the feeding nozzle (4). The bottom end of the negative pressure pipe (13) extends to the lower port of the feeding nozzle (4). The end of the negative pressure pipe (13) away from the feeding nozzle (4) is connected to the negative pressure generator (14).

2. The four-sided powder packaging machine integrating negative pressure dust removal and recycling according to claim 1, characterized in that: A mounting base (15) is fixedly installed inside the front housing (6). Two sliding blocks (16) are slidably installed inside the mounting base (15). The two bag pressing rollers (11) are respectively rotatably installed on the front side of the two sliding blocks (16). A first servo motor (12) is fixedly installed on the rear side of the two sliding blocks (16). A reset spring (17) is provided inside the mounting base (15) to press the two sliding blocks (16) together in the middle.

3. The four-sided powder packaging machine integrating negative pressure dust removal and recycling according to claim 2, characterized in that: The surface of the bag pressing roller (11) is provided with an annular groove (18) and a smooth clamping part (19). The annular groove (18) matches the surface of the feeding nozzle (4). The two bag pressing rollers (11) are clamped on both sides of the packaging bag (10) by the smooth clamping part (19).

4. A four-sided powder packaging machine integrating negative pressure dust removal and recycling according to claim 3, characterized in that: The cross-section of the bag pressing roller (11) is elliptical. When the two bag pressing rollers (11) rotate towards each other, the axes of the two bag pressing rollers (11) alternate between moving away from each other and moving closer to each other, which drives the two sliding blocks (16) to move away from each other or closer to each other.

5. A four-sided powder packaging machine integrating negative pressure dust removal and recycling according to claim 4, characterized in that: The negative pressure generator (14) is a telescopic airbag. Both ends of the negative pressure generator (14) are fixedly connected to the two sliding blocks (16). An air inlet connector (20) and an air outlet connector (21) are fixedly installed on the upper and lower sides of the negative pressure generator (14). A one-way valve (22) is provided inside the air inlet connector (20) and the air outlet connector (21). The end of the negative pressure pipe (13) away from the feed nozzle (4) is connected to the air inlet connector (20).

6. A four-sided powder packaging machine integrating negative pressure dust removal and recycling according to claim 5, characterized in that: The negative pressure dust removal mechanism also includes a cyclone dust collector (23), and the air outlet connector (21) is connected to the cyclone dust collector (23) through a pipe.

7. A four-sided powder packaging machine integrating negative pressure dust removal and recycling according to claim 6, characterized in that: During the rotation of the bag pressing roller (11), when the long axis of the bag pressing roller (11) changes from horizontal to vertical, the negative pressure generator (14) is compressed and exhausts into the cyclone dust collector (23), and the feeding nozzle (4) fills the packaging bag (10) with material; when the long axis of the bag pressing roller (11) changes from vertical to horizontal, the negative pressure generator (14) is stretched and the dust raised in the packaging bag (10) is drawn into the negative pressure generator (14).

8. A four-sided powder packaging machine integrating negative pressure dust removal and recycling according to claim 6, characterized in that: The bottom end of the cyclone dust collector (23) is connected to the buffer silo (2). The upper opening of the cyclone dust collector (23) is provided with a filter bag (24), and a support spring is provided inside the filter bag (24). A double spiral feeding screw (25) is rotatably installed inside the buffer silo (2). The drive unit (3) drives the double spiral feeding screw (25) to rotate.

9. A four-sided powder packaging machine integrating negative pressure dust removal and recycling according to any one of claims 1-8, characterized in that: The vertical sealing assembly (8) includes two sets of sealing wheels (26). The two sets of sealing wheels (26) are symmetrically arranged on both sides of the feed nozzle (4). Each set of sealing wheels (26) has two coaxially arranged roller structures. A second servo motor (27) for driving the sealing wheels (26) to rotate is provided in the front housing (6). Anti-slip grooves are provided on the surface of the sealing wheels (26). An electric heater (28) for heating the sealing wheels (26) is provided on the front side of the front housing (6).

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