Plastic packaging bag sealing machine

Abstract

The utility model belongs to the technical field of sealing machines, and particularly relates to a plastic packaging bag sealing machine which comprises a base, a corrugated pipe and a heating plate and further comprises two sliding grooves, the two sliding grooves are formed in the base, an extrusion plate is installed between the two sliding grooves in a sliding mode, the corrugated pipe is fixedly installed on the extrusion plate, and the heating plate is arranged on the corrugated pipe. A fixing frame is fixedly installed on the base and located below the extrusion plate. The two sliding strips are installed in the base in a sliding mode and located below the fixing frame, the heating plate is fixedly installed on one side of one sliding strip, a fixing strip is fixedly installed on one side of the other sliding strip, and a sliding plate is installed in the base and located below the two fixing strips in a sliding mode; the driving assembly is located in the base and used for driving the extrusion plate and the two sliding strips to slide; the plastic bag can be automatically fixed and filled with liquid, time is saved, meanwhile, the plastic bag filled with the liquid can be automatically sealed, and labor is saved.

Description

Technical Field

[0001] This utility model belongs to the field of sealing machine technology, and in particular relates to a sealing machine for plastic packaging bags. Background Technology

[0002] Plastic packaging bag sealing machines are equipment used for sealing and packaging plastic bags. They can seal plastic films of various materials, such as PE, PP, and aluminum film. They feature strong sealing, high efficiency, and easy operation, and are widely used in the food, pharmaceutical, and daily chemical industries.

[0003] For example, Chinese patent CN222062472U discloses a plastic packaging bag sealing machine, relating to the field of packaging bag sealing technology. This plastic packaging bag sealing machine includes a support base, an adjusting mechanism, and a pressing mechanism. The adjusting mechanism is located on top of the support base and includes a fixed plate, a threaded rod, an internal threaded block, and a barrier plate. Multiple sets of fixed plates are fixedly installed on both sides of the support base. Threaded rods are rotatably installed on adjacent sides of the fixed plates. The outer wall of the threaded rod is threadedly connected to the inner thread of the internal threaded block. A barrier plate is fixedly installed on the top of the internal threaded block. The pressing mechanism is located above the support base and includes a movable plate, a spring, and a pressing plate. The bottom of the movable plate is fixedly connected to one end of the spring, and the other end of the spring is fixedly connected to the top of the pressing plate. This allows for control of the distance between the sealing position and the bag opening according to the packaging needs of different products, ensuring that the sealing position of different plastic packaging bags remains approximately the same and preventing skewing of the seal.

[0004] The aforementioned patent has the following problems:

[0005] The patented device has some drawbacks in its use, such as its design limitations. It can only effectively seal plastic bags containing solids, and its operation is inconvenient for plastic bags containing liquids. This greatly limits the overall scope and flexibility of the device and cannot meet diverse packaging needs. Therefore, we propose a plastic packaging bag sealing machine. Utility Model Content

[0006] The purpose of this utility model is to provide a plastic packaging bag sealing machine to solve the problems mentioned in the background art.

[0007] In view of this, the present invention provides a plastic packaging bag sealing machine, including a base, a corrugated pipe, and a heating plate, and further includes:

[0008] Two sliding grooves are provided, both of which are formed inside the base. A common extrusion plate is slidably installed between the two sliding grooves. The corrugated pipe is fixedly installed on the extrusion plate. A fixing bracket is fixedly installed on the base and below the extrusion plate.

[0009] Two sliding bars are slidably installed inside the base and located below the fixing frame. The heating plate is fixedly installed on one side of one of the sliding bars, and a fixing bar is fixedly installed on one side of the other sliding bar. A sliding plate is slidably installed inside the base and below the two fixing bars.

[0010] A drive assembly, located within the base, is used to drive the extrusion plate and two sliding bars to slide.

[0011] A reset assembly, located within the base, is used to reset the sliding plate.

[0012] In this technical solution, when sealing is required, the plastic bag is first placed on the fixing frame, and then the opening of the plastic bag is placed on the top of the fixing frame. Through the set drive component, the extrusion plate can be driven to slide downward. The extrusion plate drives the corrugated tube to move downward. When the bottom of the extrusion plate contacts the top of the fixing frame, the opening of the plastic bag can be fixed to ensure that the plastic bag will not fall off when filling. Then, an appropriate amount of liquid is injected into the plastic bag through the corrugated tube. At the same time as the liquid is injected, the bottom of the plastic bag will be in close contact with the sliding plate, and the liquid in the plastic bag will squeeze the sliding plate downward. Under the action of the reset component, the sliding plate moves at a slower speed. The sliding plate can support the bottom of the plastic bag, so that the bottom of the plastic bag can be supported and buffered when the liquid is injected. Supporting the bottom of the plastic bag helps to maintain the shape of the plastic bag and prevents it from being excessively deformed due to the liquid flow during the liquid injection process.

[0013] The drive assembly allows two sliding bars to slide and move closer together. The two sliding bars then move the heating plate and the fixing bar closer together. When the heating plate and the fixing bar press the two sides of the plastic bag together, the heating plate is activated to heat the plastic bag and seal it. The process is repeated, and the sealed plastic bag containing liquid can be removed. This allows for automatic filling and sealing of plastic bags, saving labor.

[0014] In the above technical solution, the driving component further includes:

[0015] A hydraulic cylinder is fixedly installed on the top of the base and above the sliding groove. The telescopic end of the hydraulic cylinder extends through the base into the sliding groove and is fixedly connected to the extrusion plate.

[0016] The power chamber is located inside the base and on one side of the two sliding bars. A motor is fixedly installed on the base and on one side of the power chamber. The output shaft of the motor extends through the base into the power chamber and is fixedly installed with a gear. Racks are meshed on both the upper and lower sides of the gear, and the two racks are fixedly connected to the two sliding bars respectively.

[0017] In this technical solution, an appropriate amount of liquid is then injected into the plastic bag through a corrugated tube. At the same time as the liquid is injected, the bottom of the plastic bag will be in close contact with the sliding plate, and the liquid inside the plastic bag will squeeze the sliding plate downward. The sliding plate is squeezed and slides downward, which in turn drives the two sliding columns to slide downward. At the same time, the two springs are squeezed and contracted, so that the bottom of the plastic bag can be supported and buffered when the liquid is injected. Supporting the bottom of the plastic bag helps to maintain the shape of the plastic bag and prevents it from being excessively deformed due to the flow of liquid during the injection process.

[0018] In the above technical solution, the reset component further includes:

[0019] A sliding cavity is formed inside the base and located below the sliding plate. Two sliding columns are slidably installed inside the sliding cavity. The upper ends of the two sliding columns pass through the sliding cavity and extend to the outside. The top ends of the two sliding columns are fixedly connected to the sliding plate. A spring is sleeved on the upper end of the two sliding columns.

[0020] In this technical solution, when sealing is required, the plastic bag is first placed on the fixed frame, then the opening of the plastic bag is placed over the top of the fixed frame, and then the hydraulic cylinder is activated. The hydraulic cylinder drives the extrusion plate to slide downward, and the extrusion plate drives the corrugated pipe to move downward. When the bottom of the extrusion plate contacts the top of the fixed frame, the opening of the plastic bag can be fixed to ensure that the plastic bag will not fall off when filling.

[0021] Next, start the motor. The motor is powered on and drives the gear to rotate. The gear drives the two racks meshing with it to slide and move closer to each other. The two racks drive the two sliding strips to slide and move closer to each other. The two sliding strips drive the heating plate and the fixing strip to move closer to each other. When the heating plate and the fixing strip squeeze the two sides of the plastic bag, the heating plate is activated. The heating plate can heat the plastic bag and seal it. Finally, reverse the above operation. Then the sealed plastic bag containing liquid can be taken out. The plastic bag can be automatically filled and sealed, saving labor.

[0022] In the above technical solution, furthermore, the two ends of the two springs are welded to the sliding plate and the base, respectively.

[0023] In this technical solution, the stability of the two springs during use is ensured.

[0024] In the above technical solution, the telescopic end of the hydraulic cylinder is slidably connected to the base and the sliding groove, the output shaft of the motor is rotatably connected to the base and the power cavity, both racks are slidably connected to the power cavity, and the gear is rotatably connected to the power cavity.

[0025] In this technical solution, it is ensured that the telescopic end of the hydraulic cylinder can slide within the base and the sliding groove, that the output shaft of the motor can rotate within the base and the power chamber, that both racks can slide within the power chamber, and that the gears can rotate within the power chamber.

[0026] In the above technical solution, a rubber strip is further fixedly installed at the bottom of the extrusion plate, and the rubber strip is tightly fitted with the fixing frame.

[0027] In this technical solution, the rubber strip ensures that the opening of the plastic bag can be firmly fixed.

[0028] In the above technical solution, the heating plate and the fixing strip are located on the same horizontal plane.

[0029] In this technical solution, it is ensured that the heating plate and the fixing strip can squeeze the two sides of the plastic bag.

[0030] The beneficial effects of this utility model are:

[0031] 1. This plastic packaging bag sealing machine first places the plastic bag on a fixed frame, then places the opening of the plastic bag over the top of the fixed frame. A drive assembly drives a pressure plate to slide downwards, which in turn moves a corrugated tube downwards. When the bottom of the pressure plate contacts the top of the fixed frame, it secures the opening of the plastic bag, ensuring it won't fall out during filling. Next, an appropriate amount of liquid is injected into the plastic bag through the corrugated tube. Simultaneously, the bottom of the plastic bag comes into close contact with the sliding plate, and the liquid inside the bag pushes the sliding plate downwards. A reset assembly slows the sliding plate's movement, allowing it to support the bottom of the plastic bag. This cushioning helps maintain the bag's shape and prevents excessive deformation due to liquid flow during injection. The machine automatically secures the plastic bag and injects liquid, saving time.

[0032] 2. This plastic packaging bag sealing machine, through its drive assembly, can drive two sliding strips to slide and move closer to each other. The two sliding strips respectively drive the heating plate and the fixing strip to move closer to each other. When the heating plate and the fixing strip squeeze the two sides of the plastic bag, the heating plate is activated, which heats the plastic bag and completes the sealing of the plastic bag. Finally, the above operation is reversed, and then the sealed plastic bag containing liquid can be taken out. It can automatically seal plastic bags filled with liquid, saving labor. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0034] Figure 2This is one of the schematic diagrams of the cross-sectional structure of the base of this utility model;

[0035] Figure 3 This is the utility model Figure 2 Enlarged structural diagram at point A;

[0036] Figure 4 This is the second schematic diagram of the cross-sectional structure of the base of this utility model;

[0037] Figure 5 This is the third schematic diagram of the cross-sectional structure of the base of this utility model;

[0038] Figure 6 This is a schematic diagram of the sliding bar area structure of this utility model.

[0039] The markings in the diagram are as follows:

[0040] 1. Base; 2. Sliding groove; 3. Extrusion plate; 4. Corrugated pipe; 5. Fixing frame; 6. Power chamber; 7. Sliding bar; 8. Heating plate; 9. Fixing bar; 10. Sliding plate; 11. Hydraulic cylinder; 12. Motor; 13. Gear; 14. Rack; 15. Sliding chamber; 16. Sliding column; 17. Spring; 18. Rubber strip. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0042] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0043] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0044] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" 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 application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0045] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0046] Example 1:

[0047] Please see Figure 1 - Figure 6 As shown, this embodiment provides a plastic packaging bag sealing machine, including a base 1, a corrugated pipe 4, and a heating plate 8, and also includes:

[0048] Two sliding grooves 2 are both opened in the base 1. The same extrusion plate 3 is slidably installed between the two sliding grooves 2. The corrugated pipe 4 is fixedly installed on the extrusion plate 3. A fixing bracket 5 is fixedly installed on the base 1 and below the extrusion plate 3.

[0049] Two sliding bars 7 are slidably installed inside the base 1 and are both located below the fixing frame 5. A heating plate 8 is fixedly installed on one side of one of the sliding bars 7, and a fixing bar 9 is fixedly installed on one side of the other sliding bar 7. A sliding plate 10 is slidably installed inside the base 1 and below the two fixing bars 9.

[0050] The drive assembly is located inside the base 1 and is used to drive the extrusion plate 3 and the two sliding bars 7 to slide.

[0051] A reset assembly is located inside the base 1 and is used to reset the sliding of the sliding plate 10.

[0052] When sealing is required, the plastic bag is first placed on the fixing frame 5. Then, the opening of the plastic bag is placed on the top of the fixing frame 5. Through the set drive component, the extrusion plate 3 can be driven to slide downward. The extrusion plate 3 drives the corrugated pipe 4 to move downward. When the bottom of the extrusion plate 3 contacts the top of the fixing frame 5, the opening of the plastic bag can be fixed to ensure that the plastic bag will not fall off when filling. Then, an appropriate amount of liquid is injected into the plastic bag through the corrugated pipe 4. At the same time as the liquid is injected, the bottom of the plastic bag will be in close contact with the sliding plate 10, and the liquid in the plastic bag will squeeze the sliding plate 10 downward. Under the action of the reset component, the sliding plate 10 moves at a slower speed. The sliding plate 10 can support the bottom of the plastic bag, so that the bottom of the plastic bag can be supported and buffered when the liquid is injected. Supporting the bottom of the plastic bag helps to maintain the shape of the plastic bag and prevents it from being excessively deformed due to the flow of liquid during the injection process.

[0053] The drive assembly allows two sliding bars 7 to slide and move closer to each other. The two sliding bars 7 then move the heating plate 8 and the fixing bar 9 closer to each other. When the heating plate 8 and the fixing bar 9 press the two sides of the plastic bag together, the heating plate 8 is activated. The heating plate 8 heats the plastic bag, thus sealing it. Finally, the above operation is reversed, and the sealed plastic bag containing liquid can be removed. The plastic bag can be automatically filled and sealed, saving labor.

[0054] In this embodiment, the driving component includes:

[0055] Hydraulic cylinder 11 is fixedly installed on the top of base 1 and above sliding groove 2. The telescopic end of hydraulic cylinder 11 extends through base 1 into sliding groove 2 and is fixedly connected to extrusion plate 3.

[0056] The power chamber 6 is located inside the base 1 and on one side of the two sliding bars 7. A motor 12 is fixedly installed on the base 1 and on one side of the power chamber 6. The output shaft of the motor 12 extends through the base 1 into the power chamber 6 and is fixedly installed with a gear 13. Racks 14 are meshed on both the upper and lower sides of the gear 13. The two racks 14 are fixedly connected to the two sliding bars 7 respectively.

[0057] Next, an appropriate amount of liquid is injected into the plastic bag through the corrugated pipe 4. At the same time as the liquid is injected, the bottom of the plastic bag will be in close contact with the sliding plate 10, and the liquid in the plastic bag will squeeze the sliding plate 10 downward. The sliding plate 10 is squeezed and slides downward, which drives the two sliding columns 16 to slide downward. At the same time, the two springs 17 are squeezed and contracted, so that the bottom of the plastic bag can be supported and buffered when the liquid is injected. Supporting the bottom of the plastic bag helps to maintain the shape of the plastic bag and prevents it from being excessively deformed due to the flow of liquid during the injection process.

[0058] In this embodiment, the reset component includes:

[0059] The sliding cavity 15 is opened in the base 1 and located below the sliding plate 10. Two sliding columns 16 are slidably installed in the sliding cavity 15. The upper ends of the two sliding columns 16 pass through the sliding cavity 15 and extend to the outside. The top ends of the two sliding columns 16 are fixedly connected to the sliding plate 10. Springs 17 are sleeved on the upper ends of the two sliding columns 16.

[0060] When sealing is required, first place the plastic bag on the fixing frame 5, then put the opening of the plastic bag over the top of the fixing frame 5, then start the hydraulic cylinder 11, the hydraulic cylinder 11 drives the extrusion plate 3 to slide downward, the extrusion plate 3 drives the corrugated pipe 4 to move downward, when the bottom of the extrusion plate 3 contacts the top of the fixing frame 5, the opening of the plastic bag can be fixed to ensure that the plastic bag will not fall off when filling.

[0061] Next, start motor 12. Motor 12 is powered on and drives gear 13 to rotate. Gear 13 drives two racks 14 that mesh with it to slide and move closer to each other. The two racks 14 drive two sliding strips 7 to slide and move closer to each other. The two sliding strips 7 drive heating plate 8 and fixing strip 9 to move closer to each other. When heating plate 8 and fixing strip 9 squeeze the two sides of the plastic bag, heating plate 8 is activated. Heating plate 8 can heat the plastic bag, so that the plastic bag is sealed. Finally, reverse the above operation, and then the sealed plastic bag containing liquid can be taken out. The plastic bag can be automatically filled and sealed, saving labor.

[0062] Example 2:

[0063] This embodiment provides a plastic packaging bag sealing machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0064] In this embodiment, the two ends of the two springs 17 are welded to the sliding plate 10 and the base 1, respectively.

[0065] This ensures the stability of the two springs 17 during use.

[0066] Example 3:

[0067] This embodiment provides a plastic packaging bag sealing machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0068] In this embodiment, the telescopic end of the hydraulic cylinder 11 is slidably connected to the base 1 and the sliding groove 2, the output shaft of the motor 12 is rotatably connected to the base 1 and the power chamber 6, both racks 14 are slidably connected to the power chamber 6, and the gear 13 is rotatably connected to the power chamber 6.

[0069] Specifically, it is ensured that the telescopic end of the hydraulic cylinder 11 can slide within the base 1 and the sliding groove 2, that the output shaft of the motor 12 can rotate within the base 1 and the power chamber 6, that both racks 14 can slide within the power chamber 6, and that the gear 13 can rotate within the power chamber 6.

[0070] Example 4:

[0071] This embodiment provides a plastic packaging bag sealing machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0072] In this embodiment, a rubber strip 18 is fixedly installed at the bottom of the extrusion plate 3, and the rubber strip 18 is tightly fitted with the fixing frame 5.

[0073] The rubber strip 18 ensures that the opening of the plastic bag can be securely fixed.

[0074] Example 5:

[0075] This embodiment provides a plastic packaging bag sealing machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0076] In this embodiment, the heating plate 8 and the fixing strip 9 are located on the same horizontal plane.

[0077] In this way, the heating plate 8 and the fixing strip 9 can squeeze the two sides of the plastic bag.

[0078] Working principle: When sealing is required, first place the plastic bag on the fixing frame 5, then put the opening of the plastic bag over the top of the fixing frame 5, then start the hydraulic cylinder 11, the hydraulic cylinder 11 drives the extrusion plate 3 to slide downward, the extrusion plate 3 drives the corrugated pipe 4 to move downward. When the bottom of the extrusion plate 3 and the rubber strip 18 are in contact with the top of the fixing frame 5, the opening of the plastic bag can be fixed to ensure that the plastic bag will not fall off when filling. Then, inject an appropriate amount of liquid into the plastic bag through the corrugated pipe 4. At the same time as the liquid is injected, the bottom of the plastic bag will be in close contact with the sliding plate 10, and the liquid in the plastic bag will squeeze the sliding plate 10 downward. The sliding plate 10 is squeezed and slides downward, driving the two sliding columns 16 to slide downward. At the same time, the two springs 17 are squeezed and contracted, so that the bottom of the plastic bag can be supported and buffered when the liquid is injected. Supporting the bottom of the plastic bag helps to maintain the shape of the plastic bag and prevents it from being excessively deformed due to the flow of liquid during the injection process.

[0079] Next, start motor 12. Motor 12 is powered on and drives gear 13 to rotate. Gear 13 drives two racks 14 that mesh with it to slide and move closer to each other. The two racks 14 drive two sliding strips 7 to slide and move closer to each other. The two sliding strips 7 drive heating plate 8 and fixing strip 9 to move closer to each other. When heating plate 8 and fixing strip 9 squeeze the two sides of the plastic bag, heating plate 8 is activated. Heating plate 8 can heat the plastic bag, so that the plastic bag is sealed. Finally, reverse the above operation, and then the sealed plastic bag containing liquid can be taken out. The plastic bag can be automatically filled and sealed, saving labor.

[0080] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A plastic packaging bag sealing machine comprising a base (1), a bellows (4) and a heating plate (8), characterized in that, Also includes: Two sliding grooves (2) are provided in the base (1). The same extrusion plate (3) is slidably installed between the two sliding grooves (2). The corrugated pipe (4) is fixedly installed on the extrusion plate (3). A fixing bracket (5) is fixedly installed on the base (1) and below the extrusion plate (3). Two sliding bars (7) are slidably installed in the base (1) and located below the fixing frame (5). The heating plate (8) is fixedly installed on one side of one of the sliding bars (7), and a fixing bar (9) is fixedly installed on one side of the other sliding bar (7). A sliding plate (10) is slidably installed in the base (1) and located below the two fixing bars (9). A drive assembly located within the base (1) and used to drive the extrusion plate (3) and two sliding bars (7) to slide. A reset assembly is located inside the base (1) and is used to reset the sliding of the sliding plate (10).

2. The plastic packaging bag sealing machine according to claim 1, characterized in that, The driving component includes: Hydraulic cylinder (11) is fixedly installed on the top of the base (1) and located above the sliding groove (2). The telescopic end of the hydraulic cylinder (11) extends through the base (1) into the sliding groove (2) and is fixedly connected to the extrusion plate (3). A power chamber (6) is located inside the base (1) and on one side of the two sliding bars (7). A motor (12) is fixedly installed on the base (1) and on one side of the power chamber (6). The output shaft of the motor (12) extends through the base (1) into the power chamber (6) and is fixedly installed with a gear (13). Racks (14) are meshed on both the upper and lower sides of the gear (13). The two racks (14) are fixedly connected to the two sliding bars (7) respectively.

3. A plastic bag sealer as claimed in claim 2, wherein The reset component includes: A sliding cavity (15) is formed inside the base (1) and located below the sliding plate (10). Two sliding columns (16) are slidably installed inside the sliding cavity (15). The upper ends of the two sliding columns (16) pass through the sliding cavity (15) and extend to the outside. The top ends of the two sliding columns (16) are fixedly connected to the sliding plate (10). A spring (17) is sleeved on the upper end of the two sliding columns (16).

4. A plastic bag sealer as claimed in claim 3, wherein The two ends of the two springs (17) are welded to the sliding plate (10) and the base (1), respectively.

5. The plastic bag sealer of claim 3 wherein, The telescopic end of the hydraulic cylinder (11) is slidably connected to the base (1) and the sliding groove (2), the output shaft of the motor (12) is rotatably connected to the base (1) and the power chamber (6), both racks (14) are slidably connected to the power chamber (6), and the gear (13) is rotatably connected to the power chamber (6).

6. The plastic bag sealer of claim 1 wherein, A rubber strip (18) is fixedly installed at the bottom of the extrusion plate (3), and the rubber strip (18) is closely fitted with the fixing frame (5).

7. The plastic bag sealer of claim 1 wherein, The heating plate (8) and the fixing strip (9) are located on the same horizontal plane.

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