Packaging bag heat-sealing anti-sticking device for powder packaging machine
By integrating feeding, discharging, pressing, negative pressure extraction and heat sealing functions into the processing table structure design, the problems of adhesion and pressure regulation in the heat sealing device of the powder packaging machine are solved, realizing an efficient and continuous powder packaging process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-24
- Publication Date
- 2026-03-24
AI Technical Summary
Existing powder packaging machines' heat sealing devices are prone to causing packaging bags to stick to the heat sealing blades at high temperatures, affecting sealing performance and production efficiency. Furthermore, they lack pressure adaptive adjustment functions, leading to inconsistent sealing strength and process interruptions.
It adopts a processing table structure design, integrating feeding, discharging, pressing, negative pressure extraction and heat sealing functions. It uses rubber pressure strips and heat sealing cutters to achieve seamless connection of each process, and adjusts the heat sealing pressure according to the thickness of the powder packaging through adjustable height heat sealing cutters and positioning mechanism.
It improved production efficiency, ensured consistency in sealing and sealing strength, avoided process interruptions, and enhanced overall operational continuity.
Smart Images
Figure CN121717005A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of heat-sealing packaging technology, and in particular to a heat-sealing and anti-sticking device for packaging bags used in powder packaging machines. Background Technology
[0002] Heat-sealing and anti-sticking devices for packaging bags used in powder packaging machines are widely used in automated packaging production lines for granular or powdery materials such as food additives, chemical raw materials, and pharmaceutical powders. They play a crucial role, especially in scenarios with stringent requirements for sealing, production efficiency, and material stability. For example, in the food industry, this device needs to complete heat sealing in a vacuum environment to prevent oxidation and deterioration; in the chemical industry, it is necessary to ensure that the packaging bag has no risk of leakage after heat sealing; and in the pharmaceutical industry, it is even more necessary to meet the high-precision heat sealing requirements in a sterile environment. Such devices are usually integrated into high-speed packaging production lines and need to work in conjunction with processes such as vacuuming, feeding, and discharging. They also need to adapt to differences in packaging thickness caused by different powder densities. For example, the heat sealing pressure and anti-sticking requirements for packaging lightweight powders such as milk powder and heavy powders such as cement are significantly different, and existing technologies are difficult to accurately adapt to multiple scenarios.
[0003] Taking the domestic authorized patent CN213355046U (a heat sealing device and a powder packaging machine having the same) as an example, this patent alleviates the problem of adhesion between the packaging bag and the blade to some extent by setting a scraping component on the surface of the heat sealing blade and using a movable scraper to remove the adhesive on the heating surface. Its core structure includes a support member and a moving member that can move in opposite directions. The heating part on the moving member cooperates with the support surface to complete the heat sealing, while the scraper automatically removes the residue on the heating surface through mechanical linkage. However, this solution still has the following limitations: First, the mechanical linkage structure of the scraper relies on precise timing control, which is prone to delays in high-speed packaging. The device suffers from several drawbacks. First, the heat-sealing blade lacks a proper anti-sticking material, leading to incomplete cleaning, especially when packaging oily or sticky powders, resulting in localized adhesion. Second, the surface material of the heat-sealing blade is not modified for non-stick properties, causing wear and tear over time, which reduces cleaning efficiency. Furthermore, the contact between the scraper and the heated surface may introduce additional mechanical stress, increasing the risk of tearing the packaging bag. Third, the device lacks integrated pressure regulation, resulting in a fixed heat-sealing pressure that cannot be dynamically adjusted based on the packaging bag thickness or powder characteristics, leading to inconsistent sealing strength across different batches. Additionally, the feeding and discharging processes rely on an independent transmission mechanism, creating gaps in the connection with the heat-sealing process and hindering continuous operation throughout the entire process.
[0004] The core defects of existing technologies are as follows: First, during the heat sealing process, the packaging bag material (such as polyethylene composite film and aluminum foil composite material) melts at high temperatures and easily undergoes intermolecular adsorption with the surface of the heat sealing blade, forming irreversible adhesion. This not only makes it difficult to separate the packaging bag but also leaves hot-melt material residue on the blade surface, affecting the subsequent heat sealing effect. Second, when the blade separates from the packaging bag, if the adhesion is not completely removed, the tearing force is concentrated in the weak area of the seal, which can easily cause damage to the edge of the packaging bag or delamination of the seal, directly reducing the packaging's airtightness. This risk of leakage caused by tearing is particularly prominent when packaging brittle powders (such as pharmaceutical powders). Furthermore, traditional heat-sealing devices are mostly independent modules, and the negative pressure extraction process needs to be completed separately before heat sealing, which leads to process interruption. Moreover, the deformation of the packaging bag due to elastic recovery after negative pressure extraction will affect the heat sealing accuracy. In addition, the layout of the vacuum pipeline required for continuous negative pressure extraction and the mechanical movement of the heat sealing mechanism are prone to spatial interference, which further restricts the integrated design. Finally, existing devices generally lack a pressure adaptive adjustment mechanism, and cannot dynamically adjust the heat sealing pressure according to the difference in powder bulk density or packaging bag thickness. This results in some packages being partially sealed due to insufficient pressure, while others are over-melted due to excessive pressure or accelerated blade wear. Summary of the Invention
[0005] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a heat-sealing and anti-sticking device for packaging bags for powder packaging machines, which can solve the problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a heat-sealing and anti-sticking device for packaging bags for a powder packaging machine, comprising a workbench, a feeding mechanism, an installation platform and a guide plate. The feeding mechanism is disposed on the workbench and is used to convey powder packaging bags. The installation platform is erected on the top of the workbench and located on the side of the feeding mechanism. The guide plate is installed on the side of the workbench near the conveying direction of the feeding mechanism. It also includes a heat-sealing and pressing mechanism, a positioning mechanism, a negative pressure extraction component, and a lifting platform. The heat-sealing and pressing mechanism is used to press and heat-seal the powder packaging bags. The positioning mechanism is located on the front side of the heat-sealing and pressing mechanism and is used to adjust the downward stroke of the pressing mechanism on the heat-sealing and pressing mechanism. The negative pressure extraction component is located on the rear side of the installation platform and is used to vacuum the powder packaging bags. The lifting platform is located on the installation platform, and the heat-sealing and pressing mechanism is installed on the lifting platform. The lifting platform is used to drive the heat-sealing and pressing mechanism and the positioning mechanism to rise and fall. The whole adopts a processing table structure design and integrates active feeding, discharging, pressing, negative pressure extraction and heat sealing functions. It can realize the continuous connection of each process, reduce the transition gap, avoid process interruption, and make the negative pressure extraction, heat sealing, feeding and discharging operations continuous, thereby improving the overall production efficiency. Preferably, the feeding mechanism includes a side support, a main drive roller, a secondary drive roller, a main drive belt, and a secondary drive belt. A side support is erected on the top of the workbench. Two sets of main drive rollers are rotatably connected to the inner side of the side support. One end of the main drive roller extends to one side through the side support and is fixedly connected to a coaxial secondary drive roller. A main drive belt is sleeved on the main drive roller, and a secondary drive belt is sleeved on the secondary drive roller. Preferably, in the pulleys, belt, cover, and servo motor, one set of main drive rollers has a set of coaxial pulleys fixedly connected to the other end, a servo motor is installed at the bottom of the worktable, the output shaft of the servo motor is fixedly connected to a set of pulleys through a coupling, a belt is sleeved between the two sets of pulleys, and a cover is installed on the top of the worktable to cover the pulleys at the end of the main drive rollers. Preferably, the lifting platform includes a guide sleeve, a guide rod, a lower seat, a servo cylinder B, and a top seat. Two sets of guide sleeves are integrally formed on the surface of the installation platform and are perpendicular to the installation platform. The guide rod is movably sleeved inside the guide sleeve. The top seat is fixedly installed on the top of the guide rod. The servo cylinder B with its free end facing downward is installed at the bottom of the installation platform. The lower seat is connected to the bottom end of the guide rod, and the free end of the servo cylinder B is connected to the lower seat. Preferably, the heat-sealing and pressing mechanism includes a servo cylinder A, a heat-sealing cutter, a rubber strip, a sealing base, and a lower heat-sealing cutter. A servo cylinder A with its free end facing downwards is mounted on the top of the top seat. The free end of the servo cylinder A is connected to the heat-sealing cutter. A rubber strip is suspended at the bottom of the top seat, located behind the heat-sealing cutter. The rubber strip ensures a tight seal at the bag opening during pressing, reducing gas leakage and improving negative pressure efficiency. Simultaneously, due to the low adhesion of the rubber material, it can disperse the force exerted by the heat-sealing cutter during separation, preventing tearing and ensuring sealing. A lower heat-sealing cutter and a sealing base are respectively installed on the top of the mounting platform, directly below the heat-sealing cutter and the rubber strip. Limiting baffles for limiting the movement of the powder packaging bag are provided on the sides of both the main drive belt and the sealing base. Preferably, the positioning mechanism includes an L-plate, a movable groove, a positioning post, a positioning head, and positioning bolts. The L-plate is fixedly connected to the front side of the heat-sealing cutter. The top of the L-plate is integrally formed with a movable groove distributed along the Y-axis. A vertically arranged positioning post is arranged in the movable groove. The bottom end of the positioning post is connected to a positioning head that can abut against the powder packaging bag. Two sets of positioning bolts are threadedly connected to the positioning post and are arranged above and below the L-plate. By adjusting the height of the positioning post, the degree of descent of the heat-sealing cutter can be changed, thereby flexibly adjusting the heat-sealing pressure according to the thickness of the powder packaging bag, ensuring that packaging bags of different thicknesses receive appropriate heat-sealing pressure, and avoiding poor heat-sealing effect caused by improper pressure. Preferably, the negative pressure suction assembly includes a guide rail, a slide block, a duckbill throat tube, a connecting seat, and an electric push rod. A guide rail distributed along the Y-axis is installed near the rear side of the mounting platform surface. A slide block is slidably installed on the guide rail. A duckbill throat tube that can extend into the powder packaging bag is clamped and fixed on the slide block. A connecting seat is connected to the side of the slide block. An electric push rod parallel to the axis of the duckbill throat tube is installed on the top of the mounting platform at the side of the guide rail. The free end of the electric push rod is connected to the connecting seat. The compression effect of the rubber pressure strip can improve the negative pressure suction efficiency.
[0007] Compared with the prior art, the beneficial effects of the present invention are: 1. This application uses a rubber seat to press the opening of the powder packaging bag, which can ensure a tight seal of the bag opening during the negative pressure extraction process, reduce gas leakage, and improve the efficiency of negative pressure extraction. At the same time, the rubber material has low adhesion to the packaging bag and the heat sealing blade. When the heat sealing blade separates from the packaging bag, the elastic support of the rubber seat can disperse the separation force, avoiding tearing caused by local adhesion, effectively ensuring the sealing performance of the packaging bag, and solving the problem of heat sealing adhesion and tearing affecting the sealing performance in the prior art. 2. This application adopts a processing table structure design and integrates active feeding, discharging, pressing, negative pressure extraction and heat sealing functions, which can realize the continuous connection of each process, reduce the conversion gap between independent modules, avoid the process interruption problem caused by the dispersion of processes in traditional equipment, and make the negative pressure extraction, heat sealing, feeding and discharging operations continuous, improving the overall production efficiency and solving the defects of inconvenient continuous operation in the prior art. 3. The adjustable horizontal support foot provided on the front side of the heat sealing cutter in this application can change the degree of descent of the heat sealing cutter by adjusting the height of the support foot, thereby flexibly adjusting the heat sealing pressure according to the thickness of the powder packaging, ensuring that packaging bags of different thicknesses can obtain appropriate heat sealing pressure, avoiding the problem of poor heat sealing effect due to improper pressure, and solving the defect of the prior art that cannot adjust the heat sealing pressure according to the thickness of the powder packaging. Attached Figure Description
[0008] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a right-side perspective view of the present invention; Figure 2 This is a left-side perspective view of the present invention; Figure 3 This is a rear bottom view of the present invention; Figure 4 This is an enlarged view of part A of the present invention; Figure 5 This is a rear top view of the present invention; Figure 6 This is a structural diagram of the negative pressure extraction component of the present invention; Figure 7 This is the right view of the present invention.
[0009] Reference numerals: 1. Workbench; 2. Feeding mechanism; 21. Side support; 22. Main drive roller; 23. Secondary drive roller; 24. Main drive belt; 25. Pulley; 26. Belt; 27. Secondary drive belt; 28. Machine cover; 29. Servo motor; 3. Mounting platform; 4. Guide plate; 5. Heat sealing and pressing mechanism; 51. Servo cylinder A; 52. Heat sealing cutter; 53. Rubber strip; 54. Sealing base; 55. 6. Lower heat-sealing cutter; 6. Positioning mechanism; 61. L-plate; 62. Movable groove; 63. Positioning column; 64. Positioning head; 65. Positioning bolt; 7. Limiting baffle; 8. Negative pressure extraction assembly; 81. Guide rail; 82. Slide seat; 83. Duckbill throat tube; 84. Connecting seat; 85. Electric push rod; 9. Lifting platform; 91. Guide sleeve; 92. Guide support rod; 93. Lower seat; 94. Servo cylinder B; 95. Top seat. Detailed Implementation
[0010] Please see Figure 1-7 This invention provides a technical solution: a heat-sealing and anti-sticking device for packaging bags in a powder packaging machine, comprising a workbench 1, a feeding mechanism 2, an mounting platform 3, and a guide plate 4. The feeding mechanism 2 is mounted on the workbench 1 and used to convey powder packaging bags. The mounting platform 3 is mounted on the top of the workbench 1 and located on the side of the feeding mechanism 2. The guide plate 4 is mounted on the side of the workbench 1 near the conveying direction of the feeding mechanism 2. It also includes a heat-sealing and pressing mechanism 5, a positioning mechanism 6, a negative pressure assembly 8, and a lifting platform 9. The heat-sealing and pressing mechanism 5 is used to press and heat-seal the powder packaging bags. The positioning mechanism 6 is located on the heat-sealing and pressing machine. The front side of the structure 5 is used to adjust the downward stroke of the pressing mechanism on the heat sealing and pressing mechanism 5. The vacuum component 8 is located on the rear side of the installation platform 3 and is used to vacuum the powder packaging bag. The lifting platform 9 is located on the installation platform 3 and the heat sealing and pressing mechanism 5 is installed on the lifting platform 9. The lifting platform 9 is used to drive the heat sealing and pressing mechanism 5 and the positioning mechanism 6 to lift. The whole system integrates active feeding, discharging, pressing, vacuuming and heat sealing functions through the processing table structure. Each process does not need to run independently, reducing the interruption between modules and ensuring that vacuuming, heat sealing, feeding and discharging operations are carried out continuously, effectively improving the overall production efficiency. The feeding mechanism 2 includes a side support 21, a main drive roller 22, a secondary drive roller 23, a main drive belt 24, and a secondary drive belt 27. The side support 21 is installed on the top of the workbench 1. Two sets of main drive rollers 22 are rotatably connected to the inside of the side support 21. One end of the main drive roller 22 extends to one side through the side support 21 and is fixedly connected to the coaxial secondary drive roller 23. The main drive roller 22 is fitted with the main drive belt 24, and the secondary drive roller 23 is fitted with the secondary drive belt 27. The mechanism also includes pulleys 25, belts 26, a machine cover 28, and a servo motor 29. The other end of one set of main drive rollers 22 is fixedly connected to a coaxial set of pulleys 25. The bottom of the workbench 1 is equipped with a servo motor 29. The output shaft of the servo motor 29 is fixedly connected to a set of pulleys 25 through a coupling. A belt 26 is fitted between the two sets of pulleys 25. The top of the workbench 1 is equipped with a machine cover 28 that covers the pulleys 25 at the end of the main drive rollers 22. The lifting platform 9 includes a guide sleeve 91, a guide rod 92, a lower seat 93, a servo cylinder B94, and a top seat 95. Two sets of guide sleeves 91, perpendicular to the platform 3 and located on opposite sides, are integrally formed on the surface of the mounting platform 3. The guide rod 92 is movably fitted inside the guide sleeve 91. A top seat 95 is fixedly installed on the top of the guide rod 92. A servo cylinder B94 with its free end facing downwards is installed at the bottom of the mounting platform 3. The lower seat 93 is connected to the bottom end of the guide rod 92, and the free end of the servo cylinder B94 is connected to the lower seat 93. (Heat sealing press machine) Component 5 includes a servo cylinder A51, a heat-sealing cutter 52, a rubber pressure strip 53, a sealing base 54, and a lower heat-sealing cutter 55. The servo cylinder A51 with its free end facing downwards is mounted on the top of the top seat 95. The free end of the servo cylinder A51 is connected to the heat-sealing cutter 52. The rubber pressure strip 53 is suspended at the bottom of the top seat 95, located behind the heat-sealing cutter 52. During pressing, the rubber pressure strip 53 ensures a tight seal at the bag opening, reducing gas leakage during the negative pressure extraction process and improving extraction efficiency. Simultaneously, the low adhesion of the rubber material allows for proper sealing between the heat-sealing cutter 52 and the packaging bag. During separation, the force is dispersed to avoid tearing and ensure sealing. A lower heat-sealing cutter 55 and a sealing base 54 are respectively installed on the top of the mounting platform 3, directly below the heat-sealing cutter 52 and the rubber strip 53. Limiting baffles 7 for limiting the position of the powder packaging bag are provided on the sides of both the main drive belt 24 and the sealing base 54. The positioning mechanism 6 includes an L-plate 61, a movable groove 62, a positioning post 63, a positioning head 64, and positioning bolts 65. The L-plate 61 is fixedly connected to the front of the heat-sealing cutter 52, and an integrally formed Y-axis directional... The movable groove 62 is distributed in the direction of the heat sealing tool 52. The bottom end of the movable groove 62 is connected to a positioning head 64 that can contact the powder packaging bag. The positioning post 63 is threaded with two sets of positioning bolts 65 located above and below the L plate 61. By adjusting the positioning bolts 65, the height of the positioning post 63 can be changed, and the descent degree of the heat sealing tool 52 can be adjusted. Thus, the heat sealing pressure can be flexibly changed according to the thickness of the powder packaging, ensuring that packaging bags of different thicknesses can obtain appropriate heat sealing pressure and preventing heat sealing effect problems caused by unsuitable pressure. Secondly, the negative pressure extraction assembly 8 includes a guide rail 81, a slide 82, a duckbill throat tube 83, a connecting seat 84, and an electric push rod 85. The guide rail 81, distributed along the Y-axis, is installed near the rear side of the mounting platform 3. The slide 82 is slidably installed on the guide rail 81. The duckbill throat tube 83, which can extend into the powder packaging bag, is clamped and fixed on the slide 82. The connecting seat 84 is connected to the side of the slide 82. The electric push rod 85, parallel to the axis of the duckbill throat tube 83, is installed on the top of the mounting platform 3 at the side of the guide rail 81. The free end of the electric push rod 85 is connected to the connecting seat 84. The duckbill throat tube 83, in conjunction with the pressing action of the rubber pressure strip 53, can further optimize the negative pressure extraction effect and reduce the residual gas in the bag.
[0011] Working principle: Start the servo motor 29 to drive the main drive belt 24 and the auxiliary drive belt 27 to start transmission. Place the powder packaging bag to be heat-sealed on it and convey it to the heat sealing and pressing mechanism 5. Stop the machine to ensure that the opening of the powder packaging bag is aligned with the limit baffle 7 on one side of the heat sealing cutter 52. Control the free end of the electric push rod 85 to extend, and the duckbill throat tube 83 extends into the powder packaging bag. Connect the tail end of the duckbill throat tube 83 to the negative pressure device. Control the free end of the servo cylinder B94 to extend. The rubber pressure strip 53 cooperates with the sealing base 54 to press the opening of the powder packaging bag. Turn on the external negative pressure device to draw negative pressure into the powder packaging bag through the duckbill throat tube 83. Then control the free end of the electric push rod 85 to retract, and the duckbill throat tube 83 is pulled out from the powder packaging bag. The rubber pressure strip 53 and the sealing base 54 continue to press and seal the opening of the powder packaging bag. The free end of the servo cylinder A51 is extended, driving the heat sealing cutter 52 to descend and cooperate with the lower heat sealing cutter 55 to heat seal the powder packaging bag. After heat sealing, the free end of the servo cylinder A51 is retracted, and the rubber pressure strip 53 and the positioning head 64 apply pressure to the vicinity of the heat-sealed area to prevent adhesion. Then, the free end of the servo cylinder B94 is retracted, and the top seat 95 drives the heat sealing and pressing mechanism 5 to rise. The feeding mechanism 2 is controlled to continue to convey the heat-sealed powder packaging bag, and the heat-sealed powder packaging bag falls through the guide plate 4.
[0012] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.
Claims
1. A packaging bag heat-sealing anti-sticking device for a powder packaging machine, characterized by, The utility model relates to a powder packaging bag heat sealing and pressing device, including: Workbench (1), feeding mechanism (2), installation platform (3) and guide plate (4), feeding mechanism (2) is located on workbench (1) and is used for conveying powder packaging bag, installation platform (3) is erected and installed on the top of workbench (1) and is located the side of feeding mechanism (2), guide plate (4) is installed on the side of workbench (1) near the conveying direction position of feeding mechanism (2); Heat sealing and pressing mechanism (5), positioning mechanism (6), negative pressure extraction assembly (8) and lifting platform (9), heat sealing and pressing mechanism (5) is used for pressing and heat sealing to powder packaging bag, positioning mechanism (6) is located at the front side of heat sealing and pressing mechanism (5) and is used for adjusting the descending stroke of pressing mechanism on heat sealing and pressing mechanism (5), negative pressure extraction assembly (8) is located at the rear side of installation platform (3) and is used for vacuumizing powder packaging bag, lifting platform (9) is located on installation platform (3) and heat sealing and pressing mechanism (5) is installed on lifting platform (9), and lifting platform (9) is used to drive heat sealing and pressing mechanism (5) and positioning mechanism (6) to lift.
2. A heat-seal anti-sticking device for packaging bags of a powder packaging machine according to claim 1, characterized in that: The feeding mechanism (2) includes a side support (21), a main drive roller (22), a secondary drive roller (23), a main drive belt (24), and a secondary drive belt (27), the side support (21) is installed vertically on the top of the workbench (1), two groups of main drive rollers (22) are rotatably connected to the inner side of the side support (21), the main drive rollers (22) extend to one side through the side support (21) at one end and are fixedly connected with coaxial secondary drive rollers (23), the main drive rollers (22) are sleeved with main drive belts (24), and the secondary drive rollers (23) are sleeved with secondary drive belts (27).
3. A heat-seal anti-sticking device for packaging bags of a powder packaging machine according to claim 2, characterized in that: The pulley (25), the belt (26), the cover (28), and the servo motor (29) are fixedly connected with a group of coaxial pulleys (25) at the other end of one group of main drive rollers (22), the servo motor (29) is installed at the bottom of the workbench (1), the output shaft of the servo motor (29) is fixedly connected with a group of pulleys (25) through a shaft coupling, the belt (26) is sleeved between the two groups of pulleys (25), and the cover (28) is installed on the top of the workbench (1) to cover the pulleys (25) at the ends of the main drive rollers (22) inside.
4. The packaging bag heat-seal anti-sticking device for a powder packaging machine according to claim 3, characterized in that: The lifting platform (9) includes a guide sleeve (91), a guide support rod (92), a lower seat (93), a servo cylinder B (94), and a top seat (95), the installation platform (3) is integrally formed with two groups of guide sleeves (91) arranged on both sides and perpendicular to the installation platform (3), the guide support rods (92) are movably sleeved in the guide sleeves (91), the top seats (95) are fixedly installed at the top of the guide support rods (92), the servo cylinder B (94) is installed at the bottom of the installation platform (3) with the free end facing downward, the lower seats (93) are connected to the bottom ends of the guide support rods (92), and the free end of the servo cylinder B (94) is connected to the lower seats (93).
5. A heat-seal anti-sticking device for packaging bags of a powder packaging machine according to claim 4, characterized in that: The heat sealing and pressing mechanism (5) includes a servo cylinder A (51), a heat sealing cutter (52), a rubber strip (53), a sealing base (54), and a lower heat sealing cutter (55). The top of the top seat (95) is equipped with a servo cylinder A (51) with its free end facing down. The free end of the servo cylinder A (51) is connected to the heat sealing cutter (52). The bottom of the top seat (95) is equipped with a rubber strip (53). The rubber strip (53) is located behind the heat sealing cutter (52). The top of the mounting platform (3) is located directly below the heat sealing cutter (52) and the rubber strip (53), respectively, where the lower heat sealing cutter (55) and the sealing base (54) are installed.
6. A heat-seal anti-sticking device for packaging bags of a powder packaging machine according to claim 5, characterized in that: The positioning mechanism (6) includes an L plate (61), a movable groove (62), a positioning post (63), a positioning head (64), and positioning bolts (65). The L plate (61) is fixedly connected to the front side of the heat sealing cutter (52). The L plate (61) is integrally formed with a movable groove (62) distributed along the Y-axis direction on the top of the L plate (61). A vertically arranged positioning post (63) is arranged in the movable groove (62). The bottom end of the positioning post (63) is connected to a positioning head (64) that can abut against the powder packaging bag. Two sets of positioning bolts (65) are threadedly connected to the positioning post (63) on the upper and lower parts of the L plate (61).
7. A heat-seal anti-sticking device for packaging bags of a powder packaging machine according to claim 6, characterized in that: The negative pressure assembly (8) includes a guide rail (81), a slide (82), a duckbill throat tube (83), a connecting seat (84), and an electric push rod (85). The guide rail (81) is installed on the surface of the mounting platform (3) near the rear side, and the slide (82) is slidably installed on the guide rail (81). The duckbill throat tube (83) that can be inserted into the powder packaging bag is clamped and fixed on the slide (82). The connecting seat (84) is connected to the side of the slide (82). The electric push rod (85) is installed on the top of the mounting platform (3) at the side of the guide rail (81) and is parallel to the axis of the duckbill throat tube (83). The free end of the electric push rod (85) is connected to the connecting seat (84).
8. A heat-seal anti-sticking device for packaging bags of a powder packaging machine according to claim 7, characterized in that: Both the main drive belt (24) and the sealing base (54) are provided with limiting baffles (7) for limiting the position of the powder packaging bag.