Plastic packaging bag sealing machine with limiting adjusting function

Abstract

The invention provides a plastic packaging bag sealing machine with a limiting and adjusting function, and belongs to the technical field of plastic packaging bag sealing machines, the plastic packaging bag sealing machine comprises a base, the top of the base is fixedly connected with an outer cover, the inner side wall of the outer cover is fixedly connected with an inner frame, the side wall of the inner frame is fixedly connected with a workbench and a front frame, and a bag inlet is formed in the workbench; the packaging machine further comprises a bag feeding assembly arranged in the workbench and used for conveying packaging bags into the sealing machine and cleaning the surfaces of the packaging bags, a sealing mechanism arranged in the inner frame and used for sealing the packaging bags, and an air filtering assembly arranged on one side of the inner frame and used for filtering the packaging bags. The air filtering assembly is used for filtering harmful gas generated during sealing of the packaging bag, the adjusting assembly is arranged in the inner frame and used for adjusting the width of the sealing edge and controlling the position of the sealing edge, the packaging bag is cleaned through the bagging assembly, and the situation that the sealing effect is affected due to the fact that foreign matter is attached to the surface of the packaging bag is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of plastic packaging bag sealing machines, in particular to a plastic packaging bag sealing machine with a limit adjustment function. Background Art

[0002] Plastic packaging bag sealing machine is a kind of mechanical equipment widely used in many industries such as food, medicine, chemical industry, etc. It not only undertakes the task of efficiently sealing various plastic bags, but also plays a vital role in ensuring the freshness of the items in the package and preventing the invasion of pollutants from the external environment. Whether it is the common snack packaging, medicine outer packaging or sealed storage of chemical raw materials in daily life, the sealing machine can provide a reliable solution and effectively ensure the quality and safety of the product. By using this equipment, enterprises can better meet the market's strict requirements on product packaging quality and hygiene standards, and at the same time improve the professional level of the packaging process.

[0003] During the use of the packaging bag sealing machine, if there is dust, fiber or particles of the packaged material attached to the surface of the packaging bag, these tiny impurities will have a negative impact on the sealing effect. When the sealing machine starts working, the heating element will heat the sealing edge of the plastic bag to soften it and eventually fuse it together. However, if there are impurities such as dust or fiber on the sealing edge, they will form physical barriers during the heating process, preventing the plastic materials from forming close contact. In this way, the seal cannot be completely fused, resulting in insufficient sealing strength, increasing the risk of seal cracking, and affecting the sealing performance of the packaging bag. How to invent a plastic packaging bag sealing machine with a limit adjustment function to improve these problems has become an urgent problem to be solved by technicians in this field. Summary of the invention

[0004] In order to make up for the above shortcomings, the present invention provides a plastic packaging bag sealing machine with a limit adjustment function, which aims to prevent the problem that foreign matter on the surface of the packaging bag affects the sealing effect.

[0005] The present invention is achieved in that:

[0006] The present invention provides a plastic packaging bag sealing machine with a limit adjustment function, comprising a base, the top of the base is fixedly connected to an outer cover, the inner side wall of the outer cover is fixedly connected to an inner frame, the side wall of the inner frame is fixedly connected to a workbench and a main frame, the interior of the workbench is provided with a bag entry, the outer side wall of the main frame is fixedly connected to an operating table, and also includes: a bag entry component, arranged inside the workbench, the bag entry component is used to transport the packaging bag into the sealing machine and clean the surface of the packaging bag, a sealing mechanism, arranged inside the inner frame, the sealing mechanism is used for sealing the packaging bag, an air filter component, arranged on one side of the inner frame, the air filter component is used to filter harmful gases generated when the packaging bag is sealed, and an adjustment component, arranged inside the inner frame, the adjustment component is used to adjust the edge sealing width and control the position of the edge sealing.

[0007] Preferably, the bag entering assembly includes a connecting cover fixedly connected to the outer side wall of the inner frame, the inner side wall of the connecting cover is fixedly connected to a conveying motor, the side wall of the connecting cover is rotatably connected to multiple bag entering shafts and multiple cleaning shafts, the output shaft of the conveying motor and the outer side wall of one of the bag entering shafts are each provided with a driving gear and a driven gear, the output shaft of the conveying motor and one of the cleaning shafts are connected by a first belt transmission, and the other cleaning shaft is connected to the bag entering shaft provided with a driven gear by a second belt transmission.

[0008] Preferably, the output shaft of the conveying motor penetrates the connecting cover and is fixedly connected to the bag entering shaft, the driving gear is meshed with the driven gear, the outer side walls of the plurality of bag entering shafts are sleeved with anti-slip sleeves, the plurality of cleaning shafts are hollow, the outer side walls of the cleaning shafts are fixedly connected with cleaning soft strips, the cleaning soft strips are arranged in a wavy pattern, the outer side wall of the cleaning shaft is provided with a plurality of circumferentially arranged air inlet holes, and the air inlet holes are equidistantly arranged in the length direction of the cleaning shaft.

[0009] Preferably, the sealing mechanism includes a push-down assembly and an upward push-up assembly, the push-down assembly includes an upper plate fixedly connected to the top of the inner frame, the top of the upper plate is fixedly connected to a main cylinder, the bottom of the upper plate is fixedly connected to multiple main frames, the telescopic end of the main cylinder is fixedly connected to an adjusting block, the bottom of the adjusting block is fixedly connected to a first support plate, a second support plate is arranged below the first support plate, the bottom of the second support plate is fixedly connected to a sealing member, the top of the second support plate is fixedly connected to multiple support shafts, the upper end fixed sleeve of the support shaft is provided with a limit sleeve, the outer side wall sleeve of the support shaft is provided with a spring, both ends of the first support plate are fixedly connected to push plates, the outer side wall of the push plate is rotatably connected to an upper push rod, the end of the upper push rod is rotatably connected to a conversion rod, and the end of the conversion rod is rotatably connected to a lower push rod.

[0010] Preferably, the first support plate and the second support plate are both slidably connected to the main frame, both ends of the spring are fixedly connected to the first support plate and the second support plate, the first support plate is slidably arranged with the support shaft, the conversion rod is rotatably connected to the side wall of the inner frame through the central axis, the lower push rod is rotatably connected to the upper push assembly, and the upper push assembly is provided with a sealing member identical to the lower push assembly, the two sealing members are arranged in a mirror image, and a heating wire is provided inside the sealing member.

[0011] Preferably, the air filter assembly includes a filter box fixedly connected to one side of the inner frame, the side wall of the filter box is fixedly connected with a box cover, a plurality of activated carbon filter plates are arranged inside the filter box, the inner side wall of the filter box is fixedly connected with a fan cover, a fan wheel is arranged inside the fan cover, the outer side wall of the fan cover is fixedly connected with a fan motor, the outer side wall of the filter box is fixedly connected with an air duct, the end of the air duct is fixedly connected with an air box, the side wall of the air box is fixedly connected with a plurality of capillary tubes, and the ends of the plurality of capillary tubes are fixedly connected with conversion blocks.

[0012] Preferably, the box cover makes the filter box sealed, a plurality of air outlet holes are opened at the bottom of the box cover, a plurality of through holes are opened on the outer side wall of the wind box, and the through holes, the fan cover, the air duct and the capillary tube are all connected.

[0013] Preferably, a circumferentially arranged air channel is opened on the side wall of the cleaning shaft located in the conversion block, the cleaning shaft and the conversion block are rotatably arranged, and the air inlet is connected to the capillary via the air channel.

[0014] Preferably, the adjustment assembly includes a stepper motor fixedly connected to the outer wall of the wind box and a plurality of support rods, the output end of the stepper motor is transmission-connected to a telescopic rod, the end of the telescopic rod is fixedly connected to a baffle, and a distance sensor is embedded in the side wall of the baffle.

[0015] Preferably, the baffle is slidably arranged within a plurality of support rods.

[0016] The beneficial effects of the present invention are as follows: the conveying motor rotates to drive the multiple bag-feeding shafts to rotate, and the bag-feeding shafts also drive the two cleaning shafts to rotate relative to each other through the first belt and the second belt, so that a relative sliding effect is generated between the packaging bag and the cleaning shaft, and the cleaning shaft cleans the packaging bag through the cleaning soft strip to prevent foreign matter from adhering to the surface of the packaging bag and affecting the sealing effect;

[0017] When the cleaning shaft cleans foreign matter on the packaging bag, the adsorption airflow generated by the impeller sucks these foreign matter from the air inlet hole and enters the filter box through the capillary tube and the air duct, further preventing the foreign matter from accumulating in the bag inlet component and affecting the sealing effect, and maintaining a good sealing environment for the sealing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of a plastic packaging bag sealing machine with a limit adjustment function provided by an embodiment of the present invention;

[0020] Figure 2 It is a schematic structural diagram of a bag-feeding component of a plastic packaging bag sealing machine with a limit adjustment function provided by an embodiment of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of a cleaning shaft of a plastic packaging bag sealing machine with a limit adjustment function provided by an embodiment of the present invention;

[0022] Figure 4 It is a structural schematic diagram of a sealing mechanism of a plastic packaging bag sealing machine with a limit adjustment function provided by an embodiment of the present invention;

[0023] Figure 5 It is a schematic diagram of the internal structure of a filter box of a plastic packaging bag sealing machine with a limit adjustment function provided by an embodiment of the present invention;

[0024] Figure 6 yes Figure 5 The enlarged view of point A in the middle;

[0025] Figure 7 It is a schematic diagram of the position of the air duct of a plastic packaging bag sealing machine with a limit adjustment function provided by an embodiment of the present invention;

[0026] Figure 8 It is a schematic diagram of the airway position of a plastic packaging bag sealing machine with a limit adjustment function provided by an embodiment of the present invention;

[0027] Fig. 9 It is a schematic structural diagram of an adjustment component of a plastic packaging bag sealing machine with a limit adjustment function provided in an embodiment of the present invention.

[0028] In the figure: 1, base; 2, outer cover; 3, inner frame; 4, workbench; 41, bag inlet; 5, main frame; 51, operating table; 6, connecting cover; 61, conveying motor; 62, bag inlet shaft; 63, cleaning shaft; 64, driving gear; 65, driven gear; 66, first belt; 67, second belt; 68, cleaning soft strip; 69, air inlet; 631, airway; 7, upper plate; 71, main cylinder; 72, main frame; 73, adjustment block; 74, first support plate; 75, second support plate; 714, sealing Components; 76, support shaft; 77, limit sleeve; 78, spring; 79, push plate; 710, upper push rod; 711, conversion rod; 712, center axis; 713, lower push rod; 8, filter box; 81, box cover; 82, air outlet; 83, activated carbon filter plate; 84, fan cover; 85, fan wheel; 88, fan motor; 89, air duct; 810, wind box; 811, capillary; 812, conversion block; 9, stepping motor; 91, support rod; 92, telescopic rod; 93, baffle; 94, distance sensor. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1, refer to Figure 1-Figure 4 A plastic packaging bag sealing machine with a limit adjustment function comprises a base 1, an outer cover 2 is fixedly connected to the top of the base 1, an inner frame 3 is fixedly connected to the inner side wall of the outer cover 2, a workbench 4 and a main frame 5 are fixedly connected to the side wall of the inner frame 3, a bag entry 41 is arranged inside the workbench 4, an operating table 51 is fixedly connected to the outer side wall of the main frame 5, and further comprises: a bag entry component arranged inside the workbench 4, the bag entry component is used to transport the packaging bag into the sealing machine and clean the surface of the packaging bag, a sealing mechanism is arranged inside the inner frame 3, and the sealing mechanism is used for sealing the packaging bag;

[0031] The bag-entering assembly includes a connecting cover 6 fixedly connected to the outer side wall of the inner frame 3, the inner side wall of the connecting cover 6 is fixedly connected to a conveying motor 61, the side wall of the connecting cover 6 is rotatably connected to a plurality of bag-entering shafts 62 and a plurality of cleaning shafts 63, the output shaft of the conveying motor 61 and the outer side wall of one of the bag-entering shafts 62 are respectively sleeved with a driving gear 64 and a driven gear 65, the output shaft of the conveying motor 61 and one of the cleaning shafts 63 are connected by a first belt 66, and the other cleaning shaft 63 is connected to the bag-entering shaft 62 sleeved with the driven gear 65. The output shaft of the conveying motor 61 is connected by a second belt 67, and is fixedly connected to the bag-entering shaft 62 through the connecting cover 6. The driving gear 64 is meshed with the driven gear 65. The outer walls of the multiple bag-entering shafts 62 are all sleeved with anti-slip sleeves. The multiple cleaning shafts 63 are all hollow. The outer walls of the cleaning shafts 63 are fixedly connected with cleaning soft strips 68. The cleaning soft strips 68 are arranged in a wavy pattern. The outer walls of the cleaning shafts 63 are provided with multiple circumferentially arranged air inlet holes 69. The air inlet holes 69 are equidistantly arranged in the length direction of the cleaning shafts 63.

[0032] The sealing mechanism includes a push-down assembly and an upward push-up assembly. The push-down assembly includes an upper plate 7 fixedly connected to the top of the inner frame 3. The top of the upper plate 7 is fixedly connected to a main cylinder 71. The bottom of the upper plate 7 is fixedly connected to a plurality of main frames 72. The telescopic end of the main cylinder 71 is fixedly connected to an adjusting block 73. The bottom of the adjusting block 73 is fixedly connected to a first support plate 74. A second support plate 75 is arranged below the first support plate 74. The bottom of the second support plate 75 is fixedly connected to a sealing member 714. The top of the second support plate 75 is fixedly connected to a plurality of support shafts 76. The upper end of the support shaft 76 is fixedly sleeved with a limit sleeve 77. The outer wall sleeve of the support shaft 76 is provided with a spring 78. Both ends of the first support plate 74 are fixedly connected to push plates 7 9, the outer wall of the push plate 79 is rotatably connected with an upper push rod 710, the end of the upper push rod 710 is rotatably connected with a conversion rod 711, the end of the conversion rod 711 is rotatably connected with a lower push rod 713, the first support plate 74 and the second support plate 75 are both slidably connected to the main frame 72, the two ends of the spring 78 are fixedly connected to the first support plate 74 and the second support plate 75, the first support plate 74 is slidably arranged with the support shaft 76, the conversion rod 711 is rotatably connected to the side wall of the inner frame 3 through the central axis 712, the lower push rod 713 is rotatably connected with an upper push assembly, the upper push assembly is provided with a sealing member 714 identical to the lower push assembly, the two sealing members 714 are arranged in a mirror image, and a heating wire is arranged inside the sealing member 714;

[0033] It should be noted that, by controlling the output end of the main cylinder 71 to extend, the adjustment block 73 is driven to move downward, the first support plate 74 is driven to move downward, and the spring 78 is driven to push the second support plate 75 to move downward, so that the push-down assembly drives the sealing member 714 thereon to move downward, and the first support plate 74 also drives the push plate 79 to move downward, drives the upper push rod 710 to push the conversion rod 711 to rotate, drives the lower push rod 713 to move upward, and further drives the upper push assembly to move upward, so that the upper push assembly drives the sealing member 714 thereon to move upward, so that the two sealing members 714 move relative to each other, clamp the packaging bag, and melt the packaging bag for sealing processing through the heating wire arranged inside the sealing member 714;

[0034] By setting the spring 78, when the first support plate 74 pushes the spring 78 and the second support plate 75, the spring 78 plays a buffering role to prevent the impact caused by the relative movement of the upper push assembly and the lower push assembly driven by the main cylinder 71, and further buffer the impact of the collision between the two sealing members 714 when they come into contact with each other.

[0035] In this embodiment, the conveying motor 61 is controlled to rotate, and the output shaft of the conveying motor 61 drives the bag entering shaft 62 to rotate. The output shaft of the conveying motor 61 also drives the other bag entering shaft 62 to rotate through the engagement of the driving gear 64 and the driven gear 65. The two bag entering shafts 62 have different rotation directions, which are used to transport the packaging bags to be sealed from the bag entry 41 to the sealing mechanism. The two bag entering shafts 62 also drive the two cleaning shafts 63 to rotate relative to each other through the first belt 66 and the second belt 67 respectively. Since the diameter of the bag entering shaft 62 is larger than the diameter of the cleaning shaft 63, the rotation speed of the cleaning shaft 63 is greater than the rotation speed of the bag entering shaft 62, so that a relative sliding effect is generated between the packaging bag and the cleaning shaft 63. The cleaning shaft 63 cleans the packaging bag through the cleaning soft strip 68 to prevent foreign matter from adhering to the surface of the packaging bag and affecting the sealing effect.

[0036] Example 2, refer to Figure 4-Figure 8The air filter assembly is arranged on one side of the inner frame 3. The air filter assembly is used to filter the harmful gas generated when the packaging bag is sealed. The air filter assembly includes a filter box 8 fixedly connected to one side of the inner frame 3. The side wall of the filter box 8 is fixedly connected with a box cover 81. A plurality of activated carbon filter plates 83 are arranged inside the filter box 8. The inner side wall of the filter box 8 is fixedly connected with a fan cover 84. The inside of the fan cover 84 is provided with a fan wheel 85. The outer side wall of the fan cover 84 is fixedly connected with a fan motor 88. The outer side wall of the filter box 8 is fixedly connected with an air duct 89. The end of the air duct 89 is fixedly connected with a wind box 810 The side wall of the wind box 810 is fixedly connected with a plurality of thin tubes 811, and the ends of the plurality of thin tubes 811 are fixedly connected with a conversion block 812. The box cover 81 makes the filter box 8 sealed. The bottom of the box cover 81 is provided with a plurality of air outlet holes 82. The outer side wall of the wind box 810 is provided with a plurality of through holes. The through holes, the fan cover 84, the air duct 89, and the thin tubes 811 are all connected. The side wall of the cleaning shaft 63 located in the conversion block 812 is provided with a circumferential air passage 631. The cleaning shaft 63 is rotatably arranged with the conversion block 812, and the air inlet hole 69 is connected with the thin tube 811 through the air passage 631.

[0037] The adjusting component is arranged inside the inner frame 3, and is used to adjust the edge banding width and control the edge banding position. The adjusting component includes a stepping motor 9 and a plurality of struts 91 fixedly connected to the outer wall of the wind box 810. The output end of the stepping motor 9 is transmission-connected with a telescopic rod 92, and the end of the telescopic rod 92 is fixedly connected with a baffle 93, and a distance sensor 94 is embedded in the side wall of the baffle 93; the baffle 93 is slidably arranged in the plurality of struts 91;

[0038] In this embodiment, when the sealing machine is working, the edges of the plastic bag are melted and bonded together by the heating element, and this process will generate harmful gases, such as benzene, toluene and other organic volatiles. By controlling the rotation of the fan motor 88 to drive the fan wheel 85 to rotate and generate suction, the harmful gases generated during the sealing are sucked from the wind box 810 and enter the filter box 8 through the air duct 89. The activated carbon filter plate 83 in the filter box 8 absorbs the benzene, toluene and other organic volatiles in the harmful gases, thereby reducing the pollution of the harmful gases to the environment.

[0039] Furthermore, when the cleaning shaft 63 cleans foreign matter on the packaging bag, the adsorption airflow generated by the impeller 85 sucks these foreign matter from the air inlet 69 and enters the filter box 8 through the capillary 811 and the air duct 89, further preventing foreign matter from accumulating in the bag entry assembly and affecting the sealing effect, thereby maintaining a good sealing environment for the sealing mechanism.

[0040] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A plastic packaging bag sealing machine with a limit adjustment function, comprising a base (1), the top of the base (1) is fixedly connected to an outer cover (2), the inner side wall of the outer cover (2) is fixedly connected to an inner frame (3), the side wall of the inner frame (3) is fixedly connected to a workbench (4) and a main frame (5), the inside of the workbench (4) is provided with a bag inlet (41), the outer side wall of the main frame (5) is fixedly connected to an operating table (51), characterized in that: Also includes: The bag-entering assembly is arranged inside the workbench (4), and is used to convey the packaging bag into the sealing machine and clean the surface of the packaging bag. A sealing mechanism is arranged inside the inner frame (3), and is used for sealing the packaging bag. The air filter assembly is arranged on one side of the inner frame (3), and is used to filter harmful gases generated when the packaging bag is sealed. An adjustment component is arranged inside the inner frame (3), and is used to adjust the edge sealing width and control the position of the edge sealing.

2. A plastic packaging bag sealing machine with limit adjustment function according to claim 1, characterized in that: The bag-entering assembly comprises a connecting cover (6) fixedly connected to the outer side wall of the inner frame (3); the inner side wall of the connecting cover (6) is fixedly connected to a conveying motor (61); the side wall of the connecting cover (6) is rotatably connected to a plurality of bag-entering shafts (62) and a plurality of cleaning shafts (63); the output shaft of the conveying motor (61) and the outer side wall of one of the bag-entering shafts (62) are respectively sleeved with a driving gear (64) and a driven gear (65); the output shaft of the conveying motor (61) and one of the cleaning shafts (63) are connected in transmission via a first belt (66); the other cleaning shaft (63) is connected in transmission via a second belt (67) to the bag-entering shaft (62) sleeved with the driven gear (65).

3. The plastic packaging bag sealing machine with limit adjustment function according to claim 2, characterized in that: The output shaft of the conveying motor (61) penetrates the connecting cover (6) and is fixedly connected to the bag-entering shaft (62); the driving gear (64) is meshed with the driven gear (65); the outer walls of the plurality of bag-entering shafts (62) are sleeved with anti-slip sleeves; the plurality of cleaning shafts (63) are hollow; the outer walls of the cleaning shafts (63) are fixedly connected with cleaning soft strips (68); the cleaning soft strips (68) are arranged in a wavy pattern; the outer walls of the cleaning shafts (63) are provided with a plurality of circumferentially arranged air inlet holes (69); the air inlet holes (69) are equidistantly arranged in the length direction of the cleaning shaft (63).

4. The plastic packaging bag sealing machine with limit adjustment function according to claim 1, characterized in that: The sealing mechanism comprises a push-down assembly and an push-up assembly, wherein the push-down assembly comprises an upper plate (7) fixedly connected to the top of the inner frame (3), the top of the upper plate (7) is fixedly connected to a main cylinder (71), the bottom of the upper plate (7) is fixedly connected to a plurality of main frames (72), the telescopic end of the main cylinder (71) is fixedly connected to an adjustment block (73), the bottom of the adjustment block (73) is fixedly connected to a first support plate (74), a second support plate (75) is arranged below the first support plate (74), and the bottom of the second support plate (75) is fixedly connected to The sealing member (714) comprises a plurality of support shafts (76) fixedly connected to the top of the second support plate (75), a limit sleeve (77) being fixedly provided on the upper end of the support shaft (76), a spring (78) being provided on the outer wall of the support shaft (76), push plates (79) being fixedly connected to both ends of the first support plate (74), an upper push rod (710) being rotatably connected to the outer wall of the push plate (79), an end of the upper push rod (710) being rotatably connected to a conversion rod (711), and an end of the conversion rod (711) being rotatably connected to a lower push rod (713).

5. The plastic packaging bag sealing machine with limit adjustment function according to claim 4, characterized in that: The first support plate (74) and the second support plate (75) are both slidably connected to the main frame (72), the two ends of the spring (78) are fixedly connected to the first support plate (74) and the second support plate (75), the first support plate (74) and the support shaft (76) are slidably arranged, the conversion rod (711) is rotatably connected to the side wall of the inner frame (3) through the central axis (712), the lower push rod (713) is rotatably connected to the upper push assembly, and the upper push assembly is provided with a sealing member (714) identical to the lower push assembly, the two sealing members (714) are arranged in a mirror image, and a heating wire is arranged inside the sealing member (714).

6. The plastic packaging bag sealing machine with limit adjustment function according to claim 3, characterized in that: The air filter assembly comprises a filter box (8) fixedly connected to one side of the inner frame (3); a box cover (81) is fixedly connected to the side wall of the filter box (8); a plurality of activated carbon filter plates (83) are arranged inside the filter box (8); a fan cover (84) is fixedly connected to the inner side wall of the filter box (8); a fan wheel (85) is arranged inside the fan cover (84); a fan motor (88) is fixedly connected to the outer side wall of the fan cover (84); an air duct (89) is fixedly connected to the end of the air duct (89); a wind box (810) is fixedly connected to the side wall of the wind box (810); and a plurality of thin tubes (811) are fixedly connected to the ends of the plurality of thin tubes (811); and a conversion block (812) is fixedly connected to the ends of the plurality of thin tubes (811).

7. The plastic packaging bag sealing machine with limit adjustment function according to claim 6, characterized in that: The box cover (81) enables the filter box (8) to be sealed, a plurality of air outlet holes (82) are provided at the bottom of the box cover (81), a plurality of through holes are provided on the outer wall of the wind box (810), and the through holes, the fan cover (84), the air duct (89), and the capillary tube (811) are all connected.

8. The plastic packaging bag sealing machine with limit adjustment function according to claim 6, characterized in that: The cleaning shaft (63) is located on a side wall of the conversion block (812) and is provided with a circumferentially arranged air channel (631). The cleaning shaft (63) and the conversion block (812) are rotatably arranged, and the air inlet hole (69) is connected to the capillary (811) through the air channel (631).

9. The plastic packaging bag sealing machine with limit adjustment function according to claim 6, characterized in that: The adjustment assembly comprises a stepper motor (9) fixedly connected to the outer wall of the wind box (810) and a plurality of support rods (91); the output end of the stepper motor (9) is transmission-connected to a telescopic rod (92); the end of the telescopic rod (92) is fixedly connected to a baffle (93); and a distance sensor (94) is embedded in the side wall of the baffle (93).

10. The plastic packaging bag sealing machine with limit adjustment function according to claim 9, characterized in that: The baffle (93) is slidably arranged within the plurality of support rods (91).

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