Plastic bag packaging machine with automatic sealing function

Abstract

The utility model discloses a plastic bag packaging machine with automatic sealing function belongs to plastic bag packaging technical field, including conveying device and feeding device, one side of conveying device is provided with feeding device, and the upper surface of conveying device conveyor belt is pasted with packing bag, and the upper surface fixedly connected with adjusting mechanism of the frame of conveying device, the outer surface fixedly connected with sealing mechanism of adjusting mechanism, drive two sets of clamping plate flexible adjustment interval through the reduction motor drive bidirectional screw rod, adapt to different size packing bag, promote the versatility of equipment, cooperate first electric telescopic link and promote mobile shell, and the location of packing bag is realized accurate fine adjustment in combination with the location guide of first limit rod, ensure that the article in the bag and limit convex are flush, avoid the article deviation and lead to the packaging skew, and the whole adjustment process is linked control by control panel, need not manual intervention, both guarantee the position consistency of every bag packaging, and the accuracy of subsequent sealing procedure is improved.

Description

Technical Field

[0001] This utility model relates to the field of plastic bag packaging technology, specifically a plastic bag packaging machine with automatic sealing function. Background Technology

[0002] In the production processes of many industries such as food, daily necessities, and hardware accessories, plastic bag packaging machines serve as core equipment for automating product packaging. Their operating efficiency and packaging quality directly impact a company's production pace and product market competitiveness. Currently, mainstream plastic bag packaging machines on the market typically integrate basic functions such as feeding, conveying, and sealing.

[0003] In practical applications, existing plastic bag packaging machines generally suffer from insufficient ability to adjust the position of the packaging bag and the items inside. This defect directly leads to difficulties in improving packaging quality. Specifically, after the items enter the packaging bag through the feeding device, the conveyor belt carries the packaging bag to the sealing process. Due to the vibration of the conveyor belt, the irregular shape of the items themselves, or the impact force when entering the bag, the packaging bag is prone to lateral displacement, and the bag opening may also be crooked or wrinkled. At the same time, the items inside the bag often have problems such as displacement and uneven stacking. For example, one side of the items may extend beyond the edge of the packaging bag, while the other side leaves a large gap, or the center of gravity of the items may shift, causing the packaging bag to tilt as a whole.

[0004] Therefore, this utility model provides a plastic bag packaging machine with automatic sealing function to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a plastic bag packaging machine with an automatic sealing function, thus solving the aforementioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a plastic bag packaging machine with automatic sealing function, comprising a conveying device and a feeding device. The feeding device is located on one side of the conveying device, and a packaging bag is attached to the upper surface of the conveyor belt. An adjustment mechanism is fixedly connected to the upper surface of the frame of the conveying device, and a sealing mechanism is fixedly connected to the outer surface of the adjustment mechanism. A control panel is fixedly connected to the outer surface of the conveying device. A limit protrusion is fixedly connected to the upper surface of the frame of the conveying device, and a fixing frame is fixedly connected to the side surface of the frame of the conveying device. A first electric telescopic rod is fixedly connected to the side surface of the fixing frame, and the output end of the first electric telescopic rod passes through the... A movable outer shell is fixedly connected to the outer surface of the fixed frame. The movable outer shell is slidably connected to the inner side of the fixed frame, and two sets of clamping plates are slidably connected to the inner wall of the movable outer shell. The sealing mechanism includes two sets of second electric telescopic rods fixedly connected to the outer surface of the fixed frame. The fixed frame adopts a U-shaped structure, and one end of the fixed frame is fixedly connected to the side surface of the conveying device. A clamping outer shell is fixedly connected to the output end of the second electric telescopic rod. The clamping outer shell adopts an L-shaped structure, and a cutting blade is fixedly connected to the outer surface of the clamping outer shell. A third limiting rod is slidably connected to the outer surface of the clamping outer shell, and a heating plate is fixedly connected to the lower end of the third limiting rod through the outer surface of the clamping outer shell.

[0007] Furthermore, a first limiting rod is fixedly connected to the outer surface of the movable housing, and the first limiting rod is slidably connected to the outer surface of the fixed frame.

[0008] By adopting the above technical solution, the movement trajectory of the movable shell can be restricted by the first limiting rod, preventing it from deviating or shaking during the sliding process, and ensuring the stability and accuracy of the movement of the movable shell and clamping plate.

[0009] Furthermore, a bidirectional threaded rod is rotatably connected to the inner wall of the movable housing, and a geared motor is fixedly connected to the upper surface of the movable housing. The output shaft of the geared motor is fixedly connected to the outer surface of the bidirectional threaded rod.

[0010] By adopting the above technical solution, the two sets of clamping plates can move in opposite directions within the movable outer shell by driving the bidirectional threaded rod with a geared motor, thereby realizing the clamping and adjustment of packaging bags of different sizes and improving the versatility and flexibility of the equipment.

[0011] Furthermore, the upper surface of the fixing frame is provided with a through hole, and the outer surface of the geared motor is slidably connected to the inner wall of the through hole.

[0012] By adopting the above technical solution, through holes are provided to allow the geared motor to move with the moving housing, avoiding interference between the geared motor and the fixed frame when it moves, and ensuring the coordination of the movement of each component.

[0013] Furthermore, multiple sets of springs are fixedly connected to the upper surface of the heating plate, and the upper ends of the springs are fixedly connected to the outer surface of the clamping shell. The clamping shell is L-shaped, and multiple sets of resistance heating wires are fixedly connected to the inner wall of the heating plate.

[0014] By adopting the above technical solution, the elasticity of the spring allows the heating plate to maintain appropriate pressure when in contact with the packaging bag, ensuring a tight seal; the resistance heating wire provides heat to achieve heat sealing of the packaging bag; and the L-shaped clamping shell can better cooperate with the heating plate to position and seal the packaging bag.

[0015] Furthermore, a fixing plate is fixedly connected to the inner side of the fixing frame, and a limiting post is fixedly connected to the outer surface of the fixing plate. The outer surface of the limiting post is slidably connected to the outer surface of the clamping shell, and a second limiting rod is fixedly connected to the outer surface of the clamping shell. The outer surface of the second limiting rod is slidably connected to the outer surface of the fixing frame. The control panel is electrically connected to the reduction motor, the first electric telescopic rod, the second electric telescopic rod, and the resistance heating wire through wires.

[0016] By adopting the above technical solution, the fixed plate and the limiting post further limit the movement of the clamping shell, and the second limiting rod can also limit the movement trajectory of the clamping shell to ensure its precise movement; the control panel is electrically connected to each electrical component, which can realize unified control and coordination of each component, facilitate operation, and make it easy to adjust parameters according to actual conditions, thereby improving the controllability of the equipment.

[0017] Beneficial effects

[0018] This invention provides a plastic bag packaging machine with automatic sealing function. Compared with the prior art, it has the following advantages:

[0019] 1. This plastic bag packaging machine with automatic sealing function uses a geared motor to drive a bidirectional threaded rod, which in turn drives two sets of clamping plates to flexibly adjust the spacing to adapt to different sizes of packaging bags, improving the versatility of the equipment. In conjunction with the first electric telescopic rod to push the moving shell, and combined with the limiting guide of the first limiting rod, it can achieve precise fine-tuning of the packaging bag position, ensuring that the items inside the bag are flush with the limiting protrusion, avoiding the items shifting and causing the packaging to be crooked. The entire adjustment process is controlled by the control panel, without manual intervention, which not only ensures the consistency of the position of each bag packaging, but also improves the accuracy of the subsequent sealing process.

[0020] 2. This plastic bag packaging machine with automatic sealing function ensures precise movement of the clamping shell through multiple limiting mechanisms, including a U-shaped fixing frame, a fixing plate, a limiting post, and a second limiting rod. The L-shaped clamping shell, combined with a spring-buffered heating plate, applies uniform pressure to the packaging bag. Combined with real-time temperature control by a resistance heating wire and a temperature sensor, stable heat sealing is achieved, preventing over-sealing or leakage. The synchronously linked cutting blade can immediately cut off the scraps after heat sealing, ensuring the contents of the bag are tightly packed and the packaging is aesthetically pleasing. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a perspective view of the external structure of this utility model;

[0023] Figure 2 This is a front sectional view of the structure of this utility model;

[0024] Figure 3 This is a side sectional view of the structure of this utility model;

[0025] Figure 4 This is a top sectional view of the structure of this utility model.

[0026] In the diagram: 1. Conveying device; 2. Feeding device; 3. Adjusting mechanism; 301. Fixing frame; 302. Moving outer shell; 303. Gear motor; 304. Through hole; 305. First electric telescopic rod; 306. First limiting rod; 307. Bidirectional threaded rod; 308. Clamping plate; 309. Limiting protrusion; 4. Sealing mechanism; 401. Second limiting rod; 402. Second electric telescopic rod; 403. Third limiting rod; 404. Spring; 405. Clamping shell; 406. Heating plate; 407. Resistance heating wire; 408. Limiting post; 409. Cutting blade; 410. Fixing plate; 5. Packaging bag; 6. Control panel. Detailed Implementation

[0027] It should be noted that in the description of the embodiments of this application, the terms "front," "rear," "left," "right," "up," "down," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0028] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] Reference Figures 1 to 4 This application provides a plastic bag packaging machine with automatic sealing function, including a conveying device 1 and a feeding device 2. The feeding device 2 is provided on one side of the conveying device 1, and a packaging bag 5 is attached to the upper surface of the conveyor belt of the conveying device 1. An adjustment mechanism 3 is fixedly connected to the upper surface of the frame of the conveying device 1, and a sealing mechanism 4 is fixedly connected to the outer surface of the adjustment mechanism 3. A control panel 6 is fixedly connected to the outer surface of the conveying device 1. A limit protrusion 309 is fixedly connected to the upper surface of the frame of the conveying device 1, and a fixing frame 301 is fixedly connected to the side surface of the frame of the conveying device 1. A first electric telescopic rod 305 is fixedly connected to the side surface of the fixing frame 301, and a movable outer shell 3 is fixedly connected to the output end of the first electric telescopic rod 305 through the outer surface of the fixing frame 301. 02. The movable outer shell 302 is slidably connected to the inner side of the fixed frame 301, and two sets of clamping plates 308 are slidably connected to the inner wall of the movable outer shell 302. The sealing mechanism 4 includes two sets of second electric telescopic rods 402 fixedly connected to the outer surface of the fixed frame 301. The fixed frame 301 adopts a U-shaped structure, and one end of the fixed frame 301 is fixedly connected to the side surface of the conveying device 1. The output end of the second electric telescopic rod 402 is fixedly connected to the clamping shell 405. The clamping shell 405 adopts an L-shaped structure, and a cutting blade 409 is fixedly connected to the outer surface of the clamping shell 405. A third limiting rod 403 is slidably connected to the outer surface of the clamping shell 405. The lower end of the third limiting rod 403 passes through the outer surface of the clamping shell 405 and is fixedly connected to a heating plate 406.

[0030] Furthermore, a first limiting rod 306 is fixedly connected to the outer surface of the movable housing 302, and the first limiting rod 306 is slidably connected to the outer surface of the fixed frame 301. A bidirectional threaded rod 307 is rotatably connected to the inner wall of the movable housing 302. A reduction motor 303 is fixedly connected to the upper surface of the movable housing 302. The output shaft of the reduction motor 303 is fixedly connected to the outer surface of the bidirectional threaded rod 307. A through hole 304 is opened on the upper surface of the fixed frame 301. The outer surface of the reduction motor 303 is slidably connected to the inner wall of the through hole 304. The outer surface of the bidirectional threaded rod 307 is coated with grease, and the equivalent friction angle of the thread pair of the bidirectional threaded rod 307 is greater than the thread helix angle. At the same time, the threaded rod only bears radial force and has no axial movement. After the reduction motor 303 stops, there is no residual torque to interfere with the friction balance of the thread pair.

[0031] In this embodiment, the geared motor 303 drives the bidirectional threaded rod 307, which in turn drives the two sets of clamping plates 308 to flexibly adjust the spacing to accommodate packaging bags 5 of different sizes, thereby improving the versatility of the equipment. In conjunction with the first electric telescopic rod 305, the moving outer shell 302 is pushed, and the limiting rod 306 provides limiting guidance, so as to achieve precise fine-tuning of the position of the packaging bag 5, ensuring that the items inside the bag are flush with the limiting protrusion 309, and avoiding the items from shifting and causing the packaging to be crooked. The entire adjustment process is controlled by the control panel 6 in linkage, without the need for manual intervention, which not only ensures the consistency of the position of each bag of packaging, but also improves the accuracy of the subsequent sealing process.

[0032] Reference Figures 1 to 4 In one aspect of this embodiment, a plurality of springs 404 are fixedly connected to the upper surface of the heating plate 406, the upper ends of the springs 404 are fixedly connected to the outer surface of the clamping housing 405, the clamping housing 405 is L-shaped, and a plurality of resistance heating wires 407 are fixedly connected to the inner wall of the heating plate 406.

[0033] Furthermore, a fixing plate 410 is fixedly connected to the inner side of the fixing frame 301, and a limiting post 408 is fixedly connected to the outer surface of the fixing plate 410. The outer surface of the limiting post 408 is slidably connected to the outer surface of the clamping shell 405, and a second limiting rod 401 is fixedly connected to the outer surface of the clamping shell 405. The outer surface of the second limiting rod 401 is slidably connected to the outer surface of the fixing frame 301. The control panel 6 is electrically connected to the reduction motor 303, the first electric telescopic rod 305, the second electric telescopic rod 402 and the resistance heating wire 407 through wires.

[0034] In this embodiment, the sealing mechanism 4, with the help of the U-shaped fixing frame 301, the fixing plate 410, the limiting post 408, and the second limiting rod 401, ensures the precise movement of the clamping shell 405. The L-shaped clamping shell 405, together with the heating plate 406 buffered by the spring 404, can apply uniform pressure to the packaging bag 5. Combined with the real-time temperature control of the resistance heating wire 407 and the temperature sensor, stable heat sealing is achieved, avoiding over-sealing or leakage. The synchronously linked cutting blade 409 can cut off the scraps immediately after heat sealing, making the contents of the bag tight and the packaging beautiful.

[0035] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0036] Working Principle: First, the operator completes the equipment initialization settings through the control panel 6, including parameters such as the sealing temperature of the heating plate 406, the conveyor belt speed, and the clamping force of the clamping plate 308, ensuring the equipment is in a ready-to-work state. The feeding device 2 is started, precisely placing the items to be packaged into the packaging bags 5 on the conveyor belt at a set frequency. At this time, the packaging bags 5 are in an open state, with the bag opening facing upwards and the edges basically flush with the edge of the conveyor belt. The conveyor belt starts running at the preset speed, driving the packaging bags 5 containing the items forward. During the conveying process, the limiting protrusions 309 on the upper surface of the frame of the conveying device 1 contact the side of the packaging bags 5, forming a lateral limit to prevent the packaging bags 5 from shifting laterally during the conveying process. Simultaneously, the packaging bag 5 moves smoothly along the limiting protrusion 309 under the friction of the conveyor belt. The bag opening naturally tilts upward under the guidance of the limiting protrusion 309, preparing for the subsequent sealing operation. When the packaging bag 5 is conveyed to the adjustment mechanism 3, the conveying device 1 can accurately adjust the position of the packaging bag 5. The control panel 6 then controls the reduction motor 303 to start. The output shaft of the reduction motor 303 drives the bidirectional threaded rod 307 to rotate. Since the two sets of clamping plates 308 are respectively connected to the positive and negative threaded sections of the bidirectional threaded rod 307, the two sets of clamping plates 308 move relative to each other in the moving housing 302, automatically adjusting the clamping distance according to the width of the packaging bag 5, until the two sides of the packaging bag 5 are gently clamped. During this process, the first electric telescopic rod 305 starts synchronously, and its output end pushes the movable housing 302 to slide along the inner side of the fixed frame 301. The first limiting rod 306 slides synchronously along the outer surface of the fixed frame 301 to ensure that the movable housing 302 moves smoothly. This drives the clamping plate 308 and the clamped packaging bag 5 to make slight adjustments to their positions. Finally, one side of the item inside the packaging bag 5 is completely flush with the limiting protrusion 309, ensuring that the item is in the correct position inside the bag. After the adjustment is completed, the reduction motor 303 stops working, the clamping plate 308 releases the packaging bag 5, and the first electric telescopic rod 305 drives the movable housing 302 and the clamping plate 308 to reset. The control panel 6 controls the two sets of second electric telescopic rods 402 to start synchronously, and their output ends push the clamping housing 405 to move downward.

[0037] During the movement of the clamping housing 405, the second limiting rod 401 slides along the outer surface of the fixing frame 301, and the limiting post 408 slides along the surface of the clamping housing 405, together ensuring the accurate movement trajectory of the clamping housing 405. When the heating plate 406 contacts the opening of the packaging bag 5, the clamping housing 405 continues to move downward, and the spring 404 is compressed. The elastic force of the spring 404 is used to apply uniform and appropriate pressure to the opening of the packaging bag 5 by the heating plate 406. At the same time, the control panel 6 controls the resistance heating wire 407 to be energized and heated. The temperature sensor on the heating plate 406 detects the temperature of the heating plate 406 in real time and feeds the data back to the control panel 6. If the temperature is lower than the set value, the control panel 6 increases the power supply of the resistance heating wire 407; if the temperature is higher than the set value, it decreases the power supply to ensure that the heating plate 406 is always maintained within the set sealing temperature range to heat seal the opening of the packaging bag 5. While the heat sealing operation is in progress, the cutting blade 409 on the outer surface of the clamping housing 405 moves along with the clamping housing 405. Moving downwards synchronously, after heat sealing, the cutting blade 409 cuts the heat-sealed edge of the packaging bag 5, separating the individually packaged items from the subsequent packaging bags 5, and removing excess scraps from the packaging bags 5, making the items inside the packaging bags 5 more compact and improving the packaging aesthetics. After the sealing and cutting operations are completed, the control panel 6 controls the second electric telescopic rod 402 to drive the clamping housing 405 to return to its original position. The heating plate 406 and the cutting blade 409 leave the packaging bag 5. Operators can periodically clean the packaging bags 5 to prevent scraps from accumulating and causing blockages, which would affect the normal operation of the equipment. The conveyor belt continues to carry the sealed and cut packaged items forward, transporting them to the collection area at the end of the equipment. At the same time, the next packaging bag 5 containing items is conveyed to the adjustment mechanism 3 to start a new round of packaging process.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 process, method, article, or apparatus.

[0039] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic bag packaging machine with automatic sealing function, comprising a conveying device (1) and a feeding device (2), characterized in that: A feeding device (2) is provided on one side of the conveying device (1), and a packaging bag (5) is attached to the upper surface of the conveyor belt of the conveying device (1). An adjustment mechanism (3) is fixedly connected to the upper surface of the frame of the conveying device (1), a sealing mechanism (4) is fixedly connected to the outer surface of the adjustment mechanism (3), and a control panel (6) is fixedly connected to the outer surface of the conveying device (1). The upper surface of the frame of the conveying device (1) is fixedly connected to a limiting protrusion (309), and the side surface of the frame of the conveying device (1) is fixedly connected to a fixed frame (301). The side surface of the fixed frame (301) is fixedly connected to a first electric telescopic rod (305). The output end of the first electric telescopic rod (305) passes through the outer surface of the fixed frame (301) and is fixedly connected to a movable outer shell (302). The movable outer shell (302) is slidably connected to the inner side of the fixed frame (301), and the inner wall of the movable outer shell (302) is slidably connected to two sets of clamps (308). The sealing mechanism (4) includes two sets of second electric telescopic rods (402) fixedly connected to the outer surface of the fixed frame (301). The fixed frame (301) adopts a U-shaped structure, and one end of the fixed frame (301) is fixedly connected to the side surface of the conveying device (1). The output end of the second electric telescopic rod (402) is fixedly connected to a clamping shell (405). The clamping shell (405) adopts an L-shaped structure, and a cutting blade (409) is fixedly connected to the outer surface of the clamping shell (405). A third limiting rod (403) is slidably connected to the outer surface of the clamping shell (405). The lower end of the third limiting rod (403) passes through the outer surface of the clamping shell (405) and is fixedly connected to a heating plate (406).

2. A plastic bag packaging machine with automatic sealing function according to claim 1, characterized in that: The outer surface of the movable housing (302) is fixedly connected to a first limiting rod (306), and the first limiting rod (306) is slidably connected to the outer surface of the fixed frame (301).

3. A plastic bag packaging machine with automatic sealing function according to claim 2, characterized in that: The inner wall of the movable housing (302) is rotatably connected to a bidirectional threaded rod (307), and the upper surface of the movable housing (302) is fixedly connected to a geared motor (303). The output shaft of the geared motor (303) is fixedly connected to the outer surface of the bidirectional threaded rod (307).

4. A plastic bag packaging machine with automatic sealing function according to claim 3, characterized in that: The upper surface of the fixed frame (301) is provided with a through hole (304), and the outer surface of the geared motor (303) is slidably connected to the inner wall of the through hole (304).

5. A plastic bag packaging machine with automatic sealing function according to claim 3, characterized in that: The upper surface of the heating plate (406) is fixedly connected to multiple sets of springs (404), the upper end of the springs (404) is fixedly connected to the outer surface of the clamping shell (405), the clamping shell (405) is L-shaped, and the inner wall of the heating plate (406) is fixedly connected to multiple sets of resistance heating wires (407).

6. A plastic bag packaging machine with automatic sealing function according to claim 5, characterized in that: A fixing plate (410) is fixedly connected to the inner side of the fixing frame (301). A limiting post (408) is fixedly connected to the outer surface of the fixing plate (410). The outer surface of the limiting post (408) is slidably connected to the outer surface of the clamping shell (405). A second limiting rod (401) is fixedly connected to the outer surface of the clamping shell (405). The outer surface of the second limiting rod (401) is slidably connected to the outer surface of the fixing frame (301). The control panel (6) is electrically connected to the reduction motor (303), the first electric telescopic rod (305), the second electric telescopic rod (402), and the resistance heating wire (407) through wires.

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