Point-breaking type plastic bag non-intermittent continuous point-breaking edge sealing mechanism

Abstract

The utility model discloses a spot breaking type plastic bag non-intermittent continuous spot breaking edge sealing mechanism which comprises a lower machine body and an upper machine body, conveying devices are arranged on the lower machine body and the upper machine body, and a coaxial driving device for driving the two conveying devices to rotate synchronously is fixedly arranged on the lower machine body. A plurality of upper edge sealing devices are evenly arranged on the conveying device of the upper machine body, a plurality of lower edge sealing point breaking devices in one-to-one correspondence with the upper edge sealing devices are evenly arranged on the conveying device of the lower machine body, and the lower portion of the upper machine body is fixedly connected with an upper guiding main plate and upper guiding strips symmetrically arranged on the two sides of the upper guiding main plate. A first upper guide arc plate is fixedly arranged in the middle of the front side of the upper guide main plate, second upper guide arc plates fixedly connected with the upper guide main plate are symmetrically arranged on the two sides of the first upper guide arc plate, and the upper guide main plate, the upper guide strip, the first upper guide arc plate and the second upper guide arc plates are all in contact fit with the upper edge sealing device. And the rear part of the lower machine body is fixedly connected with an adjusting plate which is obliquely arranged and is in contact fit with the lower edge sealing point breaking device.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic bag production, in particular to a non-intermittent continuous point-breaking and edge-sealing mechanism for point-breaking plastic bags. Background Art

[0002] Disposable plastic bags such as disposable plastic bags and disposable fresh-keeping bags are often used in people's daily lives. Common disposable plastic bags include vest bags, drawstring bags, etc. Disposable plastic bags are usually stacked or rolled. Stacked plastic bags are placed in stacks of multiple disposable plastic bags; Rolled plastic bags are rolls of multiple interconnected point-breaking plastic bags. There is a point-breaking line between adjacent two plastic bags of the point-breaking plastic bags. The point-breaking line refers to the puncture points connecting two plastic bags and looks like a dotted line. The production of point-breaking plastic bags usually folds a plastic film to form a bag bottom and a bag mouth, and then hot-irons two bag edges on the bag body and punctures point-breaking lines between the bag edges of two adjacent bags. When using the point-breaking plastic bags, consumers only need to tear off a plastic bag along the point-breaking line.

[0003] The production processes of the existing point-breaking plastic bags are all intermittent edge-sealing and point-breaking. Usually, a hot-iron edge-sealing device and a puncturing point-breaking line device are fixedly arranged on the machine body. When the corresponding position of the folded plastic film moves to the working positions of the hot-iron edge-sealing device and the puncturing point-breaking line device, it is necessary to stop moving first. After hot-iron edge-sealing and puncturing the point-breaking line, the folded plastic film moves again, so that its next corresponding position moves to the working positions of the hot-iron edge-sealing device and the puncturing point-breaking line device for hot-iron edge-sealing and puncturing point-breaking line operations.

[0004] The existing technology has low automation, low production efficiency and high production cost. Therefore, there is an urgent need for a non-intermittent continuous point-breaking and edge-sealing mechanism for point-breaking plastic bags. Content of the Utility Model

[0005] The purpose of the utility model is to provide a non-intermittent continuous point-breaking and edge-sealing mechanism for point-breaking plastic bags.

[0006] A discontinuous plastic bag non-intermittent continuous discontinuous edge-sealing mechanism, comprising a lower body and an upper body. Conveyor devices are provided on both the lower body and the upper body. A coaxial drive device for driving the two conveyor devices to rotate synchronously is fixedly arranged on the lower body. A plurality of upper edge-sealing devices are evenly arranged on the conveyor device of the upper body. A plurality of lower edge-sealing discontinuous devices corresponding to the upper edge-sealing devices one by one are evenly arranged on the conveyor device of the lower body. A main upper guide board and upper guide bars symmetrically arranged on both sides of the main upper guide board are fixedly connected to the lower part of the upper body. A first upper guide arc plate is fixedly arranged in the middle of the front side of the main upper guide board. Second upper guide arc plates fixedly connected to the main upper guide board are symmetrically arranged on both sides of the first upper guide arc plate. The main upper guide board, the upper guide bars, the first upper guide arc plate and the second upper guide arc plates are all in contact and cooperation with the upper edge-sealing devices. An adjusting plate which is inclined and in contact and cooperation with the lower edge-sealing discontinuous devices is fixedly connected to the rear part of the lower body.

[0007] Further, the conveyor device comprises a sprocket and a chain. Two sprockets are rotatably arranged on the front side and the rear side of both the lower body and the upper body. The two sprockets on the front side and the rear side of the lower body and the upper body which are in cooperation are connected by chain drive.

[0008] Further, the coaxial drive device comprises a drive motor. The drive motor is fixedly arranged on the lower body. A drive shaft is fixedly arranged at the output end of the drive motor. Coaxial output cross-rotating gearboxes are fixedly arranged on both the lower body and the upper body. The drive shaft penetrates through the input ends of the two coaxial output cross-rotating gearboxes and is in transmission cooperation with them. A transmission shaft is fixedly arranged at the output end of the coaxial output cross-rotating gearbox. The two transmission shafts respectively penetrate through the middles of two sprockets on the same side of the lower body and the upper body and are fixedly connected to them.

[0009] Further, the upper edge sealing device includes an upper edge sealing outer casing. Both sides of the top of the upper edge sealing outer casing are respectively connected to two chains. A sealing edge seat is slidably arranged on the lower side of the upper edge sealing outer casing. A plurality of first sliding rods are arranged on both sides of the top of the sealing edge seat. The first sliding rods penetrate through the top of the upper edge sealing outer casing and are slidably connected thereto. The tops of the plurality of first sliding rods on the same side of the sealing edge seat are fixedly connected through a connecting seat. A guide wheel is rotatably arranged on the outer side of the connecting seat. The guide wheel is in contact and cooperation with the upper guide strip. A first buffer spring is sleeved on the outer part of the first sliding rod between the connecting seat and the upper edge sealing outer casing. A first wedge block and a second wedge block which cooperate with each other are slidably arranged inside the sealing edge seat. The first wedge block is slidably connected to a plurality of horizontal shafts fixedly arranged inside the sealing edge seat. A horizontal shaft buffer spring is sleeved on the outer part of the horizontal shaft between the first wedge block and the sealing edge seat. The second wedge block is slidably arranged on the top of the first wedge block and is in contact and cooperation with it. A plurality of second sliding rods are fixedly arranged on the top of the second wedge block. The second sliding rods penetrate through the top of the sealing edge seat and the upper edge sealing outer casing in sequence and are slidably connected thereto. A ball seat is fixedly arranged on the top of the second sliding rod. A second buffer spring is sleeved on the outer part of the second sliding rod between the upper edge sealing outer casing and the ball seat. A ball which is in contact and cooperation with the upper guide arc plate one and the upper guide main plate is rotatably arranged on the ball seat at the top of the second sliding rod. A pressing plate is slidably arranged between the sealing edge seat and the first wedge block. A plurality of third sliding rods are fixedly arranged on the top of the pressing plate. The third sliding rods penetrate through the top of the sealing edge seat and the upper edge sealing outer casing in sequence and are slidably connected thereto. A ball seat is fixedly arranged on the top of the third sliding rod. A third buffer spring is sleeved on the outer part of the third sliding rod between the upper edge sealing outer casing and the ball seat. A ball which is in contact and cooperation with the upper guide arc plate two and the upper guide main plate is rotatably arranged on the ball seat at the top of the third sliding rod. Silicone pressing tubes are fixedly arranged at the bottoms of both the sealing edge seat and the first wedge block.

[0010] Further, the lower edge sealing and cutting device includes a lower edge sealing and cutting plate. A dotted line tying bayonet which cooperates with the pressing plate is slidably arranged in the middle of the lower edge sealing and cutting plate. Heating strips which cooperate with the pressing plate are fixedly arranged on both sides of the dotted line tying bayonet. A support plate which cooperates with the silicone pressing tube is arranged on the outer side of the heating strip. Both the heating strip and the support plate are fixedly arranged on the top of the lower edge sealing and cutting plate. A plurality of lower rollers which cooperate with the adjusting plate are rotatably arranged at the bottom of the dotted line tying bayonet.

[0011] In summary, the utility model has the following beneficial effects:

[0012] The driving motor of the present utility model drives two conveying devices to rotate at the same speed and in opposite directions through two coaxial output cross-rotating gearboxes via a driving shaft. The conveying device on the lower body rotates counterclockwise, and the conveying device on the upper body rotates clockwise. The two conveying devices drive the cooperating upper edge-sealing device, lower edge-sealing and point-breaking device, and plastic film to move synchronously. The lower edge-sealing and point-breaking device moves to the inclined adjustment plate and cooperates with it to puncture and break the line between the edges of two adjacent bags. The remaining upper edge-sealing device and lower edge-sealing and point-breaking device cooperate with each other in sequence under the operation of the two conveying devices to perform operations such as clamping, pushing and arching, heat-sealing the edge, puncturing and breaking the line, and synchronous movement on the folded plastic film. The present utility model does not need to stop the conveyance of the plastic film, and can perform operations such as clamping, pushing and arching, heat-sealing the edge, puncturing and breaking the line on the plastic film, with high automation, improved production efficiency and reduced production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments:

[0014] Figure 1 is a three-dimensional view of a non-stop continuous point-breaking and edge-sealing mechanism for a point-breaking plastic bag of the present utility model Figure I ;

[0015] Figure 2 is a three-dimensional view of a non-stop continuous point-breaking and edge-sealing mechanism for a point-breaking plastic bag of the present utility model Figure II ;

[0016] Figure 3 is a front view of a non-stop continuous point-breaking and edge-sealing mechanism for a point-breaking plastic bag of the present utility model;

[0017] Figure 4 is a three-dimensional view when the upper edge-sealing device and the lower edge-sealing and point-breaking device of the present utility model cooperate;

[0018] Figure 5 is a front view when the upper edge-sealing device and the lower edge-sealing and point-breaking device of the present utility model cooperate.

[0019] In the figure: 1 lower body, 2 upper body, 3 conveying device, 301 sprocket wheel, 302 chain, 4 coaxial drive device, 401 drive motor, 402 drive shaft, 403 coaxial output cross-rotating gearbox, 404 transmission shaft, 5 upper guiding main board, 501 first upper guiding arc board, 502 second upper guiding arc board, 6 upper guiding strip, 7 upper edge-sealing device, 701 upper edge-sealing outer housing, 702 edge-sealing seat, 703 first sliding rod, 704 connecting seat, 705 guiding wheel, 706 first buffer spring, 707 cross shaft, 708 first wedge-shaped block, 709 cross shaft buffer spring, 710 second wedge-shaped block, 711 second sliding rod, 712 second buffer spring, 713 pressing plate, 714 third sliding rod, 715 third buffer spring, 716 ball, 717 silicone pressing tube, 718 ball seat, 8 lower edge-sealing and intermittent cutting device, 801 lower edge-sealing and intermittent cutting board, 802 intermittent cutting wire stabbing bayonet, 803 heating strip, 804 supporting plate, 805 lower roller, 9 adjusting plate. Detailed implementation manners

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0021] The following will be further described in conjunction with the attached Figures 1-5 This utility model will be further described as follows:

[0022] A point-breaking and intermittent continuous edge-sealing mechanism for plastic bags includes a lower body 1 and an upper body 2. Conveying devices 3 are provided on both the lower body 1 and the upper body 2. A coaxial drive device 4 for driving the two conveying devices 3 to rotate synchronously is fixedly provided on the lower body 1. A plurality of upper edge-sealing devices 7 are evenly arranged on the conveying device 3 of the upper body 2. A plurality of lower edge-sealing and intermittent cutting devices 8 corresponding to the upper edge-sealing devices 7 one by one are evenly arranged on the conveying device 3 of the lower body 1. A lower guiding main board 5 and upper guiding strips 6 symmetrically arranged on both sides of the lower guiding main board 5 are fixedly connected to the lower part of the upper body 2. A first upper guiding arc board 501 is fixedly provided in the middle of the front side of the lower guiding main board 5. Second upper guiding arc boards 502 fixedly connected to the lower guiding main board 5 are symmetrically arranged on both sides of the first upper guiding arc board 501. The lower guiding main board 5, the upper guiding strips 6, the first upper guiding arc board 501 and the second upper guiding arc boards 502 are all in contact and cooperation with the upper edge-sealing devices 7. An inclined adjusting plate 9 which is in contact and cooperation with the lower edge-sealing and intermittent cutting devices 8 is fixedly connected to the rear part of the lower body 1.

[0023] The conveying device 3 includes a sprocket 301 and a chain 302. Two sprockets 301 are rotatably arranged on the front and rear sides of the lower body 1 and the upper body 2. The chain 302 is drivingly connected between the two cooperating sprockets 301 on the front and rear sides of the lower body 1 and the upper body 2.

[0024] The coaxial drive device 4 includes a drive motor 401. The drive motor 401 is fixedly arranged on the lower body 1. A drive shaft 402 is fixedly arranged at the output end of the drive motor 401. Coaxial output cross-rotating gearboxes 403 are fixedly arranged on both the lower body 1 and the upper body 2. The drive shaft 402 passes through the input ends of the two coaxial output cross-rotating gearboxes 403 and is in driving cooperation with them. A transmission shaft 404 is fixedly arranged at the output end of the coaxial output cross-rotating gearbox 403. The two transmission shafts 404 respectively pass through the middle parts of the two sprockets 301 on the same side of the lower body 1 and the upper body 2 and are fixedly connected to them.

[0025] In this embodiment, the drive motor 401 drives the two conveying devices 3 to rotate at the same speed and in opposite directions through the drive shaft 402 and the two coaxial output cross-rotating gearboxes 403 at the same time. In this embodiment, the conveying device 3 on the lower body 1 rotates counterclockwise, and the conveying device 3 on the upper body 2 rotates clockwise. The coaxial output cross-rotating gearbox 403 is the application of the prior art in this embodiment, and its specific structure will not be elaborated.

[0026] When the upper edge-sealing device 7 arranged on the upper body 2 rotates to the lower part of the upper body 2, it is cooperatively connected with the corresponding lower edge-sealing and point-breaking device 8 that rotates to the upper part of the lower body 1, and clamps the plastic film between the upper edge-sealing device 7 and the lower edge-sealing and point-breaking device 8. Under the guiding action of the upper guiding main board 5, the upper guiding strip 6, the upper guiding arc plate 501 and the upper guiding arc plate 502, the upper edge-sealing device 7 cooperates with the lower edge-sealing and point-breaking device 8 to clamp, push up and thermally seal the folded plastic film. While the upper edge-sealing device 7 and the lower edge-sealing and point-breaking device 8 perform the above operations, the two conveying devices 3 drive the cooperating upper edge-sealing device 7, the lower edge-sealing and point-breaking device 8 and the plastic film to move synchronously. The lower edge-sealing and point-breaking device 8 moves to the inclined adjusting plate 9 and cooperates with it to puncture and break the line between the edges of two adjacent bags. The remaining upper edge-sealing devices 7 and lower edge-sealing and point-breaking devices 8 are sequentially cooperated one by one under the operation of the two conveying devices 3 to perform the operations of clamping, pushing up, thermally sealing, puncturing and breaking the line of the folded plastic film and synchronous movement. The utility model can perform the operations of clamping, pushing up, thermally sealing, puncturing and breaking the line of the plastic film without stopping the conveyance of the plastic film, with high automation degree, improved production efficiency and reduced production cost.

[0027] The upper edge-sealing device 7 includes an upper edge-sealing outer casing 701. The two sides of the top of the upper edge-sealing outer casing 701 are respectively connected to two chains 302. A sealing seat 702 is slidably arranged on the lower side of the upper edge-sealing outer casing 701. A plurality of first sliding rods 703 are arranged on both sides of the top of the sealing seat 702. The first sliding rods 703 penetrate through the top of the upper edge-sealing outer casing 701 and are slidably connected thereto. The tops of the plurality of first sliding rods 703 on the same side of the sealing seat 702 are fixedly connected through a connecting seat 704. A guide wheel 705 is rotatably arranged on the outside of the connecting seat 704. The guide wheel 705 is in contact and cooperation with the upper guide bar 6. A first buffer spring 706 is sleeved on the outside of the first sliding rod 703 between the connecting seat 704 and the upper edge-sealing outer casing 701. A first wedge block 708 and a second wedge block 710 which cooperate with each other are slidably arranged inside the sealing seat 702. The first wedge block 708 is slidably connected to a plurality of cross shafts 707 fixedly arranged inside the sealing seat 702. A cross shaft buffer spring 709 is sleeved on the outside of the cross shaft 707 between the first wedge block 708 and the sealing seat 702. The second wedge block 710 is slidably arranged on the top of the first wedge block 708 and is in contact and cooperation with it. A plurality of second sliding rods 711 are fixedly arranged on the top of the second wedge block 710. The second sliding rods 711 penetrate through the top of the sealing seat 702 and the upper edge-sealing outer casing 701 in sequence and are slidably connected thereto. A ball seat 718 is fixedly arranged on the top of the second sliding rod 711. A second buffer spring 712 is sleeved on the outside of the second sliding rod 711 between the upper edge-sealing outer casing 701 and the ball seat 718. A ball 716 which is in contact and cooperation with the upper guide arc plate one 501 and the upper guide main board 5 is rotatably arranged on the ball seat 718 at the top of the second sliding rod 711. A pressing plate 713 is slidably arranged between the sealing seat 702 and the first wedge block 708. A plurality of third sliding rods 714 are fixedly arranged on the top of the pressing plate 713. The third sliding rods 714 penetrate through the top of the sealing seat 702 and the upper edge-sealing outer casing 701 in sequence and are slidably connected thereto. A ball seat 718 is fixedly arranged on the top of the third sliding rod 714. A third buffer spring 715 is sleeved on the outside of the third sliding rod 714 between the upper edge-sealing outer casing 701 and the ball seat 718. A ball 716 which is in contact and cooperation with the upper guide arc plate two 502 and the upper guide main board 5 is rotatably arranged on the ball seat 718 at the top of the third sliding rod 714. Silicone pressing tubes 717 are fixedly arranged at the bottoms of both the sealing seat 702 and the first wedge block 708.

[0028] The lower edge-sealing and perforating device 8 includes a lower edge-sealing and perforating plate 801. A perforating wire bundle bayonet 802 that cooperates with the pressing plate 713 is slidably arranged in the middle of the lower edge-sealing and perforating plate 801. Heating strips 803 that cooperate with the pressing plate 713 are fixedly arranged on both sides of the perforating wire bundle bayonet 802. A supporting plate 804 that cooperates with the silicone pressing tube 717 is arranged outside the heating strip 803. Both the heating strip 803 and the supporting plate 804 are fixedly arranged on the top of the lower edge-sealing and perforating plate 801. A plurality of lower rollers 805 that cooperate with the adjusting plate 9 are rotatably arranged at the bottom of the perforating wire bundle bayonet 802.

[0029] As Figure 3 shown, the conveying device 3 on the lower body 1 rotates counterclockwise and drives the corresponding lower edge-sealing and perforating device 8 to move above the right side of the lower body 1. At the same time, the conveying device 3 on the upper body 2 rotates clockwise and drives the corresponding upper edge-sealing device 7 to move below the right side of the upper body 2. While the upper edge-sealing device 7 and the lower edge-sealing and perforating device 8 continue to move leftward, the guide wheel 705 contacts and cooperates with the upper guide bar 6, and under the guiding action of the upper guide bar 6, drives the edge-sealing seat 702 and the two silicone pressing tubes 717 to move downward through the connecting seat 704 and the first sliding rod 703. The two silicone pressing tubes 717 cooperate with the two supporting plates 804 to clamp the folded plastic film. Then, the ball 716 at the top of the second sliding rod 711 contacts the first upper guiding arc plate 501, and under the guiding action of the first upper guiding arc plate 501, drives the second wedge block 710 to move downward through the second sliding rod 711. The second wedge block 710 pushes the first wedge block 708 to move inward along the horizontal axis 707. While the first wedge block 708 moves inward, the silicone pressing tube 717 below the first wedge block 708 pushes the plastic film in contact with it to move inward, so that the plastic film of the two silicone pressing tubes 717 is pushed from the initial horizontal state into an upward-arching state, ensuring that when heat-sealing the edge later, the plastic film will have the processing allowance required for shrinkage. Then, the ball 716 at the top of the third sliding rod 714 contacts the second upper guiding arc plate 502, and under the guiding action of the second upper guiding arc plate 502, drives the pressing plate 713 to move downward through the third sliding rod 714, so that the plastic film is clamped between the pressing plate 713 and the two heating strips 803 for heat-sealing the edge. Then, the two conveying devices 3 drive the cooperating upper edge-sealing device 7, lower edge-sealing and perforating device 8 and the plastic film to move synchronously. When the lower edge-sealing and perforating device 8 moves to the inclined adjusting plate 9, the lower roller 805 contacts the adjusting plate 9 and drives the perforating wire bundle bayonet 802 to move upward, and the perforating wire bundle bayonet 802 performs a perforating and wire-breaking operation between the bag edges of two adjacent bags. Then, the two conveying devices 3 drive the cooperating upper edge-sealing device 7 and lower edge-sealing and perforating device 8 to separate.

[0030] Subsequently, multiple upper edge-sealing devices 7 and lower edge-sealing and perforating devices 8 are sequentially and pairwise coordinated to clamp, push and arch, thermally seal, and puncture and break the plastic film, with high automation, improving production efficiency and reducing production costs.

[0031] In summary, the present utility model is not limited to the above specific embodiments. Those skilled in the art can make several changes and modifications without departing from the spirit and scope of the present utility model. The protection scope of the present utility model shall be subject to the claims of the present utility model.

[0032] In the description of this patent, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this patent.

[0033] In the description of this patent, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

Claims

1. A point-breaking type plastic bag non-intermittent continuous point-breaking edge sealing mechanism, comprising a lower body (1) and an upper body (2), characterized in that: The lower machine body (1) and the upper machine body (2) are both provided with a conveying device (3); the lower machine body (1) is fixedly provided with a coaxial driving device (4) for driving the two conveying devices (3) to rotate synchronously; the conveying device (3) of the upper machine body (2) is evenly provided with a plurality of upper edge sealing devices (7); the conveying device (3) of the lower machine body (1) is evenly provided with a plurality of lower edge sealing point breaking devices (8) corresponding one to one with the upper edge sealing devices (7); the lower part of the upper machine body (2) is fixedly connected with an upper guide main board (5) and two symmetrically arranged lower edge sealing devices (8) on both sides of the upper guide main board (5); An upper guide strip (6), an upper guide arc plate 1 (501) is fixedly arranged in the middle of the front side of the upper guide main board (5), and upper guide arc plates 2 (502) fixedly connected to the upper guide main board (5) are symmetrically arranged on both sides of the upper guide arc plate 1 (501), and the upper guide main board (5), the upper guide strip (6), the upper guide arc plate 1 (501) and the upper guide arc plate 2 (502) are all in contact with the upper edge sealing device (7), and the rear part of the lower body (1) is fixedly connected with an adjustment plate (9) which is inclined and in contact with the lower edge sealing point breaking device (8).

2. A point-breaking plastic bag non-intermittent continuous point-breaking edge sealing mechanism as claimed in claim 1, characterized in that: The conveying device (3) comprises a sprocket (301) and a chain (302); two sprockets (301) are rotatably provided on the front and rear sides of the lower body (1) and the upper body (2); and the two sprockets (301) matching the front and rear sides of the lower body (1) and the upper body (2) are connected in transmission via the chain (302).

3. A point-breaking plastic bag non-intermittent continuous point-breaking edge sealing mechanism as claimed in claim 2, characterized in that: The coaxial drive device (4) comprises a drive motor (401), the drive motor (401) being fixedly arranged on the lower body (1), a drive shaft (402) being fixedly arranged at the output end of the drive motor (401), a coaxial output cross-rotation gearbox (403) being fixedly arranged on both the lower body (1) and the upper body (2), the drive shaft (402) passing through the input ends of the two coaxial output cross-rotation gearboxes (403) and being in transmission cooperation therewith, a transmission shaft (404) being fixedly arranged at the output end of the coaxial output cross-rotation gearbox (403), the two transmission shafts (404) respectively passing through the middle parts of two sprocket wheels (301) on the same side of the lower body (1) and the upper body (2) and being fixedly connected thereto.

4. A point-breaking plastic bag non-intermittent continuous point-breaking edge sealing mechanism as claimed in claim 3, characterized in that: The upper edge-sealing device (7) comprises an upper edge-sealing outer shell (701), the two sides of the top of the upper edge-sealing outer shell (701) are respectively connected to two chains (302), the lower side of the upper edge-sealing outer shell (701) is slidably provided with an edge-sealing seat (702), the two sides of the top of the edge-sealing seat (702) are provided with a plurality of first sliding rods (703), the first sliding rods (703) penetrate the top of the upper edge-sealing outer shell (701) and are slidably connected thereto, the tops of the plurality of first sliding rods (703) located on the same side of the edge-sealing seat (702) are fixedly connected via a connecting seat (704), the outer side of the connecting seat (704) is rotatably provided with a guide wheel (705), the guide wheel (705) is in contact with and cooperates with the upper guide bar (6), The first sliding rod (703) between the connecting seat (704) and the upper edge sealing outer shell (701) is sleeved with a first buffer spring (706) on the outside, and the edge sealing seat (702) is slidably provided with a first wedge block (708) and a second wedge block (710) that cooperate with each other. The first wedge block (708) is slidably connected with a plurality of transverse shafts (707) fixedly provided inside the edge sealing seat (702). The transverse shaft (707) between the first wedge block (708) and the edge sealing seat (702) is sleeved with a transverse shaft buffer spring (709) on the outside. The second wedge block (710) is slidably provided on the top of the first wedge block (708) and contacts with it. The top of the second wedge block (710) is fixedly provided with a plurality of A second slide bar (711), the second slide bar (711) sequentially passes through the edge banding seat (702) and the top of the upper edge banding outer shell (701) and is slidably connected thereto, a ball seat (718) is fixedly provided on the top of the second slide bar (711), a second buffer spring (712) is sleeved on the outside of the second slide bar (711) between the upper edge banding outer shell (701) and the ball seat (718), a ball (716) that contacts and cooperates with the upper guide arc plate 1 (501) and the upper guide main plate (5) is rotatably provided on the ball seat (718) at the top of the second slide bar (711), a pressing plate (713) is slidably provided between the edge banding seat (702) and the first wedge block (708), and the top of the pressing plate (713) is A plurality of third slide bars (714) are fixedly arranged on the upper part, and the third slide bars (714) sequentially penetrate the edge banding seat (702) and the top of the upper edge banding outer shell (701) and are slidably connected thereto; a ball seat (718) is fixedly arranged on the top of the third slide bar (714); a third buffer spring (715) is sleeved on the outside of the third slide bar (714) between the upper edge banding outer shell (701) and the ball seat (718); a ball (716) that contacts and cooperates with the upper guide arc plate 2 (502) and the upper guide main plate (5) is rotatably arranged on the ball seat (718) on the top of the third slide bar (714); and a silicone pressing tube (717) is fixedly arranged on the bottom of the edge banding seat (702) and the first wedge block (708).

5. A point-breaking plastic bag non-intermittent continuous point-breaking edge sealing mechanism as claimed in claim 4, characterized in that: The lower edge-sealing point-breaking device (8) comprises a lower edge-sealing point-breaking plate (801), a point-breaking line-piercing knife (802) cooperating with a pressing plate (713) being slidably arranged in the middle of the lower edge-sealing point-breaking plate (801), heating strips (803) cooperating with the pressing plate (713) being fixedly arranged on both sides of the point-breaking line-piercing knife (802), a supporting plate (804) cooperating with a silicone pressing tube (717) being arranged on the outer side of the heating strip (803), the heating strip (803) and the supporting plate (804) being fixedly arranged on the top of the lower edge-sealing point-breaking plate (801), and a plurality of lower rollers (805) cooperating with an adjusting plate (9) being rotatably arranged at the bottom of the point-breaking line-piercing knife (802).

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