A sealing and cutting mechanism for a packaging machine

Abstract

This utility model provides a sealing and cutting mechanism for a packaging machine, including a mounting bracket, a sealing unit, and a cutting unit. The cutting unit is located at the rear end of the sealing unit. The sealing unit includes an upper hot pressing block, a lower hot pressing block, a front elastic pressing block, a rear elastic pressing block, a first lifting driver, and a second lifting driver. The front and rear elastic pressing blocks are located on the front and rear sides of the upper hot pressing block, respectively. The first lifting driver is fixed on the mounting bracket and drives the upper hot pressing block, the front elastic pressing block, and the rear elastic pressing block. The second lifting driver is fixed on the mounting bracket and drives the lower hot pressing block. The upper and lower hot pressing blocks are arranged opposite each other. The lower end face of the upper hot pressing block and the upper end face of the lower hot pressing block are provided with corresponding hot pressing surfaces and recessed clearance notches in the hot pressing surfaces. This mechanism can expel air from the packaging bag and maintain product consistency.

Description

Technical Field

[0001] This utility model relates to the field of bagging and packaging machines, specifically to a sealing and cutting mechanism for a packaging machine. Background Technology

[0002] With the development of science and technology, the use of mechanized equipment for product production and processing has become widespread. Bag packaging is one common processing method, such as the folding packaging of disposable gloves. This involves folding the gloves, placing them into a bag, sealing the bag, and then cutting it to obtain the finished product. However, in existing technologies, sealing the bag prevents a significant amount of air from escaping, resulting in bulky packaging that increases unnecessary volume and affects product consistency. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a sealing and cutting mechanism for a packaging machine.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A sealing and cutting mechanism for a packaging machine includes a mounting bracket and a sealing unit and a cutting unit mounted on the mounting bracket, wherein the cutting unit is located at the rear end of the sealing unit; wherein the sealing unit includes an upper hot pressing block, a lower hot pressing block, a front elastic pressing block, a rear elastic pressing block, a first lifting driver and a second lifting driver, wherein the front elastic pressing block and the rear elastic pressing block are respectively located on the front and rear sides of the upper hot pressing block, the first lifting driver is fixed on the mounting bracket and drives the upper hot pressing block, the front elastic pressing block and the rear elastic pressing block; the second lifting driver is fixed on the mounting bracket and drives the lower hot pressing block, wherein the upper hot pressing block and the lower hot pressing block are arranged opposite each other, and the lower end face of the upper hot pressing block and the upper end face of the lower hot pressing block are provided with corresponding hot pressing surfaces and clearance notches recessed in the hot pressing surfaces.

[0006] Furthermore, the corresponding hot-pressing surfaces of the upper and lower hot-pressing blocks are dot-matrix surfaces, which are composed of an array of multiple hot-pressing protrusions.

[0007] Furthermore, the drive end of the first lifting driver is connected to a mounting plate, and the upper hot pressing block, the front elastic pressing block and the rear elastic pressing block are all mounted on the mounting plate.

[0008] Furthermore, the front elastic pressing block and / or the rear elastic pressing block includes a guide rod, an elastic element, and a pressing block. The guide rod is movably mounted on the mounting plate, and the lower end of the guide rod is fixedly connected to the pressing block. The elastic element is disposed between the mounting plate and the pressing block.

[0009] Furthermore, the elastic element is a spring, which is sleeved on the guide rod.

[0010] Furthermore, a carrier plate is provided below both the front elastic pressing block and the rear elastic pressing block, and the carrier plate is used to support the packaging bag.

[0011] Furthermore, the carrier plate is fixed on the mounting bracket.

[0012] Furthermore, the cutting unit includes an upper cutting blade, a lower cutting blade, and a third lifting driver. The upper cutting blade and the lower cutting blade are arranged opposite each other, the lower cutting blade is fixed on the mounting bracket, and the third lifting driver is fixed on the mounting bracket and drives the upper cutting blade.

[0013] The technical solution provided by this utility model has the following beneficial effects:

[0014] When the sealing unit performs the sealing operation, the upper and lower hot pressing blocks are equipped with corresponding clearance gaps, so that the port of the packaging bag is not completely sealed and an exhaust port is left. At the same time, under the squeezing action of the front elastic pressing block or the rear elastic pressing block, the internal air will be quickly discharged from the exhaust port, resulting in a compact finished product. Attached Figure Description

[0015] Figure 1 The diagram shown is a three-dimensional structural representation of the sealing and cutting mechanism of the packaging machine in this embodiment. Figure 1 ;

[0016] Figure 2 The diagram shown is a three-dimensional structural representation of the sealing and cutting mechanism of the packaging machine in this embodiment. Figure 2 ;

[0017] Figure 3 The figure shown is a cross-sectional view of the sealing and cutting mechanism of the packaging machine in the embodiment;

[0018] Figure 4 The diagram shows the cooperation between the upper and lower hot press blocks in the embodiment. Detailed Implementation

[0019] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0020] In the description of this utility model, terms such as "upper", "lower", "left", "right", "front", and "rear" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0022] Reference Figures 1 to 4 As shown, this embodiment provides a sealing and cutting mechanism for a packaging machine, including a mounting bracket 310 and a sealing unit and a cutting unit 330 mounted on the mounting bracket 310. The cutting unit 330 is located at the rear end of the sealing unit. The sealing unit includes an upper hot pressing block 321, a lower hot pressing block 322, a front elastic pressing block 325, a rear elastic pressing block 326, a first lifting driver 323, and a second lifting driver 324. The front elastic pressing block 325 and the rear elastic pressing block 326 are located at the front and rear of the upper hot pressing block 321, respectively. On both sides, the first lifting driver 323 is fixed on the mounting bracket 310 and drives the upper hot pressing block 321, the front elastic pressing block 325, and the rear elastic pressing block 326; the second lifting driver 324 is fixed on the mounting bracket 310 and drives the lower hot pressing block 322. The upper hot pressing block 321 and the lower hot pressing block 322 are arranged opposite each other. The lower end surface of the upper hot pressing block 321 and the upper end surface of the lower hot pressing block 322 are provided with corresponding hot pressing surfaces 340 and clearance notches 350 recessed in the hot pressing surfaces 340. That is, the hot pressing surfaces 340 of the upper hot pressing block 321 correspond to the hot pressing surfaces 340 of the lower hot pressing block 322, and the clearance notches 350 of the upper hot pressing block 321 correspond to the clearance notches 350 of the lower hot pressing block 322.

[0023] One preferred operating method is as follows: The packaging bag 1 enters the sealing and cutting mechanism from the front end. The first lifting driver 323 drives the upper hot pressing block 321, the front elastic pressing block 325, and the rear elastic pressing block 326 to move downwards simultaneously. The second lifting driver 324 drives the lower hot pressing block 322 to move upwards. The hot pressing surface 340 of the upper hot pressing block 321 and the hot pressing surface 340 of the lower hot pressing block 322 cooperate to seal the port of the packaging bag 1. In this embodiment, the packaging bag 1 is transported from front to back, and the sealing process involves sealing the front port of the first packaging bag and the rear port of the second packaging bag simultaneously. Since the upper hot pressing block 321 and the lower hot pressing block 322 are provided with corresponding clearance notches 350, the clearance notches 350 are not sealed, so the port of the packaging bag 1 is not completely sealed and an exhaust port is left. Simultaneously, after the front elastic pressing block 325 and the rear elastic pressing block 326 are pressed down, the front elastic pressing block 325 and the rear elastic pressing block 326 press against the two adjacent packaging bags 1 respectively. That is, the front elastic pressing block 325 presses against the packaging bag 1 that has not been sealed (only one end is sealed, i.e., the second packaging bag mentioned above), while the rear elastic pressing block 326 presses against the packaging bag 1 that has been sealed at both ends (i.e., the first packaging bag mentioned above). The function of the front elastic pressing block 325 is to squeeze out the air in the unsealed packaging bag 1, while the rear elastic pressing block 326 presses against the packaging bag 1 that has been sealed at both ends to prevent the air squeezed out of the second packaging bag by the front elastic pressing block 325 from entering the first packaging bag that has been sealed. After one sealing operation is completed, the packaging bag 1 is conveyed backward, and the upper and lower heating blocks 321 and 322 continue sealing. At this time, the front end of the second packaging bag and the rear end of the third packaging bag are sealed simultaneously. The front elastic pressing block 325 presses against the third packaging bag to squeeze out the air inside the third packaging bag, while the rear elastic pressing block 326 presses against the second packaging bag to prevent the air inside the third packaging bag from flowing into the second packaging bag. At the same time, the cutting unit 330 cuts the first sealed packaging bag to obtain a single packaged product, and this operation is repeated.

[0024] Of course, the rear elastic pressing block 326 also has the function of further squeezing the air inside the packaging bag 1; for example, the cutting unit 330 can first cut the first packaging bag, and then the rear elastic pressing block 326 can press down to further squeeze the air inside the second packaging bag.

[0025] Specifically, a carrier plate is provided below both the front elastic pressing block 325 and the rear elastic pressing block 326. The carrier plate is used to support the packaging bag 1, so that when the front elastic pressing block 325 and the rear elastic pressing block 326 press down, they can stably compress the packaging bag 1. Furthermore, in this embodiment, the carrier plate corresponding to the front elastic pressing block 325 (defined as the first carrier plate) is supported by other support frames, while the carrier plate corresponding to the rear elastic pressing block 326 (defined as the second carrier plate 327) is fixed on the mounting bracket 310.

[0026] Specifically, the corresponding hot-pressing surfaces 340 of the upper hot-pressing block 321 and the lower hot-pressing block 322 are dot-matrix surfaces, which are composed of an array of multiple hot-pressing protrusions. The dot-matrix structure of the hot-pressing surface 340 provides a better sealing effect and makes it less prone to melting. Furthermore, the clearance notch 350 refers to the area where the hot-pressing protrusions are located. Of course, in other embodiments, the hot-pressing surface 340 can also be a hot-pressing plane.

[0027] The drive end of the first lifting driver 323 is connected to a mounting plate (defined as the first mounting plate 328). The upper hot pressing block 321, the front elastic pressing block 325 and the rear elastic pressing block 326 are all mounted on the first mounting plate 328, thus achieving mutual connection.

[0028] The mounting bracket 310 is equipped with vertically arranged guide posts 311. The first mounting plate 328 is provided with guide holes and is fitted onto the guide posts 311 through the guide holes to achieve a guiding engagement. Similarly, the driving end of the second lifting driver 324 is connected to the second mounting plate 329, and the second mounting plate 329 forms a guiding engagement with the guide posts 311. The lower hot pressing block 322 is installed on the second mounting plate 329, thus achieving a precise sealing action. Of course, in other embodiments, the guiding engagement of the guide posts 311 may not be used. For example, a vertical slide rail can be provided on the inner wall of the mounting bracket 310, allowing the first mounting plate 328 and the second mounting plate 329 to slide on the vertical slide rail for a guiding engagement.

[0029] Furthermore, both the front elastic pressing block 325 and the rear elastic pressing block 326 include a guide rod 342, an elastic element 343, and a pressing block 341. The guide rod 342 is movably mounted on the first mounting plate 328, and the lower end of the guide rod 342 is fixedly connected to the pressing block 341. The elastic element 343 is disposed between the first mounting plate 328 and the pressing block 341. When pressed down, the pressing block 341 first presses against the packaging bag 1. As the pressure continues to decrease, the pressing block 341 receives an upward reaction force, forcing the elastic element 343 to contract and store energy, and the air inside the packaging bag 1 is gradually expelled; thus, the packaging bag 1 is effectively protected from being crushed.

[0030] Specifically, the elastic element 343 is a spring, which is sleeved on the guide rod 342 for stable assembly. Of course, other structures can also be used in other embodiments, such as the front elastic pressing block 325 or the rear elastic pressing block 326, which can also be implemented using elastic buffer blocks, etc.

[0031] Specifically, in this embodiment, the cutting unit 330 includes an upper cutting blade 332, a lower cutting blade 331, and a third lifting driver 333. The upper cutting blade 332 and the lower cutting blade 331 are arranged vertically opposite each other. The lower cutting blade 331 is fixed on the mounting bracket 310, and the third lifting driver 333 is fixed on the mounting bracket 310 and drives the upper cutting blade 332. During cutting, the third lifting driver 333 drives the upper cutting blade 332 to descend, thereby cutting the packaging bag 1. Of course, in other embodiments, the structure of the cutting unit is not limited to this.

[0032] Furthermore, the first lifting actuator 323, the second lifting actuator 324, and the third lifting actuator 333 are all cylinders.

[0033] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A sealing and cutting mechanism of a packaging machine, comprising a mounting bracket, a sealing unit and a cutting unit assembled on the mounting bracket, the cutting unit being located at the rear end of the sealing unit; characterized in that: The sealing unit includes an upper hot pressing block, a lower hot pressing block, a front elastic pressing block, a rear elastic pressing block, a first lifting driver, and a second lifting driver. The front elastic pressing block and the rear elastic pressing block are located on the front and rear sides of the upper hot pressing block, respectively. The first lifting driver is fixed on the mounting bracket and drives the upper hot pressing block, the front elastic pressing block, and the rear elastic pressing block. The second lifting driver is fixed on the mounting bracket and drives the lower hot pressing block. The upper and lower hot pressing blocks are arranged opposite each other. The lower end face of the upper hot pressing block and the upper end face of the lower hot pressing block are provided with corresponding hot pressing surfaces and clearance notches recessed in the hot pressing surfaces.

2. The closure cutting mechanism of a packaging machine according to claim 1, characterized in that: The corresponding hot-pressing surfaces of the upper and lower hot-pressing blocks are dot matrix surfaces, which are composed of an array of multiple hot-pressing protrusions.

3. The closure cutting mechanism of a packaging machine according to claim 1, characterized in that: The drive end of the first lifting driver is connected to a mounting plate, and the upper hot pressing block, the front elastic pressing block and the rear elastic pressing block are all mounted on the mounting plate.

4. The closure cutting mechanism of a packaging machine according to claim 3, characterized in that: The front elastic pressing block and / or rear elastic pressing block include a guide rod, an elastic element, and a pressing block. The guide rod is movably mounted on the mounting plate, and the lower end of the guide rod is fixedly connected to the pressing block. The elastic element is disposed between the mounting plate and the pressing block.

5. The closure cutting mechanism of a packaging machine according to claim 4, characterized in that: The elastic element is a spring, which is sleeved on the guide rod.

6. The closure cutting mechanism of a packaging machine according to claim 1, characterized in that: A carrier plate is provided below both the front elastic pressing block and the rear elastic pressing block, and the carrier plate is used to support the packaging bag.

7. The closure cutting mechanism of a packaging machine according to claim 6, characterized in that: The carrier plate is fixed on the mounting bracket.

8. The sealing and cutting mechanism of the packaging machine according to claim 1, characterized in that: The cutting unit includes an upper cutting blade, a lower cutting blade, and a third lifting driver. The upper cutting blade and the lower cutting blade are arranged opposite each other. The lower cutting blade is fixed on the mounting bracket, and the third lifting driver is fixed on the mounting bracket and drives the upper cutting blade.

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