A film bag structure and a film bag heat sealing apparatus

Abstract

The present application belongs to the technical field of film bag forming, in particular to a film bag structure and a film bag heat sealing device for forming the film bag structure; the device comprises a rack, a traction mechanism, a heat sealing mechanism, a point breaking mechanism and a pressing and rolling mechanism; the traction mechanism is arranged on the rack for feeding; the heat sealing mechanism, the point breaking mechanism and the pressing and rolling mechanism are sequentially arranged on the rack along the direction of film conveying; the heat sealing mechanism comprises upper and lower heat sealing dies and a first driving assembly connected with one of the heat sealing dies; the point breaking mechanism comprises a support, a point breaking die and a second driving assembly, and the point breaking die is arranged with a plurality of point breaking teeth; the second driving assembly is connected with the point breaking die; the pressing and rolling mechanism comprises a supporting roller, a rolling roller, a third driving assembly and a rotary driving member; the supporting roller is arranged on the rack, the third driving assembly is connected with the rolling roller, and the rotary driving member is connected with the rolling roller for driving the rolling roller to rotate, so that the rolling roller pulls off a layer of the film bag in contact with the rolling roller along the point-like cutting gap.

Description

Technical Field

[0001] The invention belongs to the technical field of film bag forming, and in particular relates to a film bag structure and film bag heat sealing equipment. Background Art

[0002] Film bags are bags made of film materials, which are widely used for packaging, storage and transportation of various items. They are usually made of plastic (such as polyethylene, polypropylene, etc.) or other synthetic materials, and are lightweight, moisture-proof and wear-resistant.

[0003] Film bags are widely used in people's daily lives, such as garbage bags, fresh-keeping bags, and shopping mall packaging bags. To facilitate the collection of film bags during production, they are collected in rolls, making them easy to collect and use. Specifically, during the production of film bags, a blow-molded double-layer film with two layers, upper and lower, and open only at both ends, is used as raw material. The double-layer film is heat-pressed or ultrasonically welded using a molding device to form a number of weld points. A tear point is formed on the film near the weld point by heat-pressing or other methods. Therefore, the film can be torn along the tear points to form individual film bags. For example, the Chinese utility model patent document with authorization announcement number CN214137570U discloses a production equipment for fresh-keeping bags, including a base, wherein support legs are fixedly installed at the bottom of the base, a fixing plate, a casing and a unwinding drum are fixedly installed above the base, a motor and a winding drum are fixedly arranged above the fixing plate, a control panel is fixedly arranged on the side of the casing, a power assembly, a heat sealing assembly and a dot-line assembly are fixedly arranged on the inside of the casing, the power assembly consists of a first roller, a second roller, a third roller, a fourth roller, a fifth roller, a sixth roller and a seventh roller, the heat sealing assembly includes a heat sealing knife and a heat sealing shaft, the heat sealing knife is fixedly arranged above the heat sealing shaft, a rotor is fixedly arranged on the heat sealing shaft, one end of the rotor is fixedly connected to a temperature controller, a spring and a nut are fixedly arranged between the heat sealing knife and the heat sealing shaft, and the spring and the nut are fixedly connected, the dot-line assembly includes fixing parts, a mounting plate is fixedly connected between the fixing parts, and a nail slot plate is fixedly installed inside the mounting plate by screws. During heat sealing, the heat sealing time and heat sealing pressure can be adjusted by adjusting the tightness of the nut to ensure the heat sealing quality. The dotted line nails are used to process easy-to-tear dotted lines on each tear of the fresh-keeping bag. The motor is started through the control panel to start the entire equipment, driving the sixth roller, the heat sealing shaft and the winding drum to rotate synchronously. The fresh-keeping bag comes out of the unwinding drum and passes through the first roller, the second roller and the third roller in sequence. When it reaches the fourth roller, the dotted line nails are used to process easy-to-tear dotted lines on each tear of the fresh-keeping bag. Then the fifth roller and the seventh roller are pressed against the sixth roller, so that the heating element is heated by the rotor under the control of the temperature controller. The heat sealing knife heat-seals the fresh-keeping bag entering the sixth roller. The heat-sealed fresh-keeping bag is sent to the winding drum through the seventh roller, thereby achieving the effect of facilitating heat sealing, processing easy-to-tear dotted lines, and improving work efficiency and product quality.

[0004] The conventional film bags utilize a double-layer heat-sealed and point-break process, resulting in the upper and lower sides of the film being stuck together. Even after the film is torn, the broken edges remain stuck together. Therefore, opening the film bag requires manual rubbing, which is inconvenient for the user. Summary of the Invention

[0005] The object of the present invention is to provide a film bag structure and a film bag heat sealing device, which are used to solve the problem that after the film bag is torn along the point break position or the dotted line position, the bag mouth needs to be manually rubbed open.

[0006] To achieve the above-mentioned purpose, an embodiment of the present invention provides a film bag structure, including a double-layer film collected on a roll; the double-layer film is hot-melt-formed with a plurality of heat-sealing positions and a plurality of point breaks, which are torn along the point breaks to form a film bag; the upper layer of the double-layer film is separated along the point breaks, and the bottom layer remains connected to the point breaks.

[0007] The above technical solution in the film bag structure provided by the embodiment of the present invention has at least the following technical effects: a plurality of heat-sealing positions and point-breaking positions are set on the double-layer template by hot melting or ultrasonic welding on the double-layer film, so that a film bag is formed between the point-breaking position and the heat-sealing position; therefore, the film can be pulled apart along the point-breaking position. Since the upper film of the film bag has been broken along the point-breaking position, when the film bag is pulled apart, a certain friction force will be generated due to the contact between the skin of the human finger and the film; therefore, when the upper film is touched, the upper film can be displaced relative to the bottom film, thereby opening the bag mouth of the film bag. After the film bag is torn apart, there is no need to rub the bag mouth open again, which is very convenient to use. In addition, since only the bottom film is connected by the point-breaking position, it is easier to pull the film bag apart.

[0008] A film bag heat sealing device is used for forming a film bag structure, and the film bag heat sealing device includes a frame, a traction mechanism, a heat sealing mechanism, a point breaking mechanism and a pressing and rubbing mechanism;

[0009] The traction mechanism is arranged on the frame for traction film transportation; the heat sealing mechanism, the point breaking mechanism and the pressing mechanism are arranged on the frame in sequence along the direction of film transportation; the heat sealing mechanism includes upper and lower heat sealing molds, and a first driving component connected to one of the heat sealing molds, the first driving component drives one of the heat sealing molds to move, so that the two heat sealing molds clamp the double-layer film, so that the double-layer film forms a fusion position; the point breaking mechanism includes a support member, a point breaking mold and a second driving component, the point breaking mold is arranged with a plurality of point breaking teeth; the second driving component is connected to the point breaking mold, and is used to drive the point breaking mold to clamp the double-layer film on the support member, so that intermittent point-shaped cutting edges are formed on the double-layer film, and the film bag can be torn off along the point-shaped cutting edges;

[0010] The pressing and rubbing mechanism includes a supporting roller, a rubbing roller, a third driving assembly and a rotating driving member; the supporting roller is arranged on the frame, the third driving assembly is connected to the rubbing roller, and is used to drive the rubbing roller and the supporting roller to clamp the film bag, and the rotating driving member is connected to the rubbing roller, and is used to drive the rubbing roller to rotate, so that the rubbing roller pulls off the layer of the film bag that contacts the rubbing roller along the dot-shaped cutting edge.

[0011] Furthermore, the film bag heat sealing device also includes an electrostatic generator, which is arranged between the point-breaking mechanism and the pressing and rubbing mechanism, and the electrostatic generator is used to input static electricity into the film bag.

[0012] Furthermore, mounting plates extend upward on both sides of the frame, the support roller is arranged between the two mounting plates, a slide is provided on the inner side of the mounting plate, and the rubbing roller is arranged between the two slides; the third driving assembly includes a lifting frame, a floating support and a driving member; guide columns are provided at both ends of the lifting frame, and the guide columns are slidably connected to the outer side of the frame; the driving member is connected to the guide columns for driving the guide columns to move up and down; the floating support is provided on the lifting frame, and the slide is connected to the floating support; the rotating driving member includes a first gear provided on the rubbing roller and a second gear provided on the mounting plate, the first gear is meshed with the second gear, and the second gear is connected to the motor.

[0013] Furthermore, a toggle piece is connected to the guide column, an eccentric sleeve is provided at one end of the support roller, the eccentric sleeve is provided with a toggle groove, and the toggle piece is provided with a toggle portion extending into the toggle groove, so that the guide column moves up and down, and the toggle piece toggle the support roller to rotate.

[0014] Furthermore, the two heat-sealing molds are respectively a heat-sealing lower mold and a heat-sealing upper mold; the heat-sealing lower mold is arranged on the frame, and the heat-sealing upper mold is arranged above the heat-sealing lower mold and connected to the first driving assembly;

[0015] The support member is arranged on the frame, and the point breaking mold is arranged above the support member.

[0016] Furthermore, the first drive assembly and the second drive assembly are lifting mechanisms with the same structure, including two lifting columns, a top plate, an adjusting rod, a connecting plate, a first compression spring and a connecting piece; the two lifting columns are respectively located on both sides of the frame, and the top plate is connected to the top ends of the two lifting columns; the two adjusting rods pass through the top plate, and the upper ends of the adjusting rods are provided with adjusting nuts; the connecting plate connects the bottom ends of the two adjusting rods; the first compression spring is sleeved on the adjusting rod, and the connecting piece connects the connecting plate and the upper heat sealing mold or the point-breaking mold; the lifting column is connected to the lifting drive member for driving the lifting column to move up and down.

[0017] Furthermore, the lifting mechanism also includes a pressure plate and a second compression spring; the two ends of the pressure plate are sleeved on the two lifting columns, and the second compression spring is sleeved on the lifting column and is located on the top side of the pressure plate; two limit members are provided on the lifting column, one limit member is limited to the bottom side of the pressure plate, and the other limit member limits the top end of the second compression spring.

[0018] Furthermore, the lower heat sealing mold and the support member are both slidably connected to the frame, and a rack is provided on the frame. The lower heat sealing mold and the support member are both rotatably connected to an adjusting gear, the adjusting gear is engaged with the rack, and the adjusting gear is connected to an adjusting handle; the bottom end of the lifting column is slidably connected to a guide rail, and the guide rail is connected to the lifting drive member.

[0019] Furthermore, the first drive assembly, the second drive assembly and the third drive assembly are connected to the same power mechanism, and the power mechanism drives the first drive assembly, the second drive assembly and the third drive assembly.

[0020] Furthermore, the power mechanism includes two crank mechanisms and a driving motor connecting the two crank mechanisms; the two crank mechanisms are respectively arranged on both sides of the frame; the crank mechanism includes an eccentric wheel, a driving arm, a supporting arm, a first swing arm, a first connecting arm, a first lifting arm, a supporting bar, a second connecting arm, a second swing arm and a second lifting arm; the eccentric wheel is connected to the driving motor, one end of the supporting arm is rotatably connected to the outside of the frame, and the other end is rotatably connected to the driving arm, and the other end of the driving arm is connected to the eccentric wheel; the two first swing arms are rotatably connected to the frame, the first swing arm includes a first end and a second end, and the first connecting arm is connected The first ends of the two first swing arms and one end of the first connecting arm are rotatably connected to the support arm; the second end of the first swing arm is connected to the first lifting arm, the support bar is rotatably connected to the upper end of the first lifting arm, and the first drive assembly and the second drive assembly are connected to the support bar; the second swing arm is rotatably connected to the outside of the frame, the second swing arm has a first end and a second end, the second connecting arm is rotatably connected to the first end of the second swing arm, and the first swing arm closer to the second connecting arm, the second lifting arm is connected to the second end of the second swing arm, and the third drive assembly is connected to the second lifting arm.

[0021] The above one or more technical solutions in the film bag heat sealing device provided by the embodiment of the present invention have at least the following technical effects:

[0022] In the heat-sealing device for film bags of the present invention, the raw materials of the double-layer film sequentially pass through the gap formed by the two heat-sealing dies of the heat-sealing mechanism, the gap formed by the support member and the point-breaking die of the point-breaking mechanism, and the gap formed by the support roller and the rubbing roller of the pressing and rubbing mechanism, and the film is pulled and conveyed by the traction mechanism. The first driving component drives the heat-sealing die to clamp the film and hot-melt-form the heat-sealing position on the film; the second driving component drives the point-breaking die to press the film onto the supporting member, and the point-breaking die and the support member cooperate with each other to form the point-breaking position on the film. When the point-breaking position is conveyed to the position of the pressing and rubbing mechanism, the third driving component drives the rubbing roller to press the film onto the supporting roller, and the rubbing roller is driven to rotate by the rotating driving member. When the rubbing roller rotates, it drives the upper layer of the film to move displacedly, so that the upper layer of the film is separated along the point-breaking position, while the lower layer of the film remains connected to the point-breaking position, so that the film bag forms a single-sided opening structure. Thus, a film bag that is convenient for consumers to use is formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic diagram of a film bag structure provided in an embodiment of the present invention.

[0025] Figure 2 This is a structural diagram of the film bag heat sealing equipment provided by an embodiment of the present invention.

[0026] Figure 3 This is a structural diagram of the lifting and driving component arrangement of the film bag heat sealing equipment provided in an embodiment of the present invention.

[0027] Figure 4 This is a structural diagram of the heat sealing mechanism and point breaking mechanism of the film bag heat sealing equipment provided by an embodiment of the present invention.

[0028] Figure 5 This is a structural diagram of the pressing and rubbing frame of the film bag heat sealing equipment provided in an embodiment of the present invention.

[0029] Figure 6 This is a structural diagram of the heat sealing mechanism of the film bag heat sealing equipment provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0031] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention 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 cannot be understood as limiting the present invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0033] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0034] In one embodiment of the film bag heat sealing device of the present invention, please refer to Figure 1 Specifically, the film bag heat-sealing equipment of this embodiment is used to form a film bag structure. The film bag structure comprises a double-layer film 1 collected from a roll; the double-layer film 1 is heat-melted with a plurality of heat-sealing locations 10 and a plurality of break points 11, which are then torn along the break points 11 to form individual film bags. The upper layer of the double-layer film 1 is separated along the break points 11, while the bottom layer remains connected to the break points 11.

[0035] To realize the forming of the film bag structure of this embodiment, please refer to Figures 2 to 6 The film bag heat sealing device of this embodiment includes a frame 100, a traction mechanism 200, a heat sealing mechanism 300, a point breaking mechanism 400 and a pressing and rubbing mechanism 500.

[0036] The traction mechanism 200 is provided on the frame 100 and is used for traction film transportation. Figure 1 The traction mechanism 200 includes an unwinding mechanism 210, a tensioning mechanism 220, multiple sets of traction roller assemblies 230, and a rewinding mechanism 240. Since the traction mechanism 200 is conventional in the art, it will not be described in detail in this embodiment. A roll of double-layer film is placed on the unwinding mechanism 210, passes through the tensioning mechanism 220 and multiple sets of traction roller assemblies 230, and the free end of the film is wound around the rewinding mechanism 240. Thus, the film is delivered by the unwinding mechanism 210 and conveyed by the traction roller assemblies 230, while the tensioning mechanism 220 tightens the film and the rewinding mechanism 240 rewinds the film.

[0037] Reference Figure 4 and Figure 5 The heat sealing mechanism 300, the point breaking mechanism 400 and the pressing and rubbing mechanism 500 are sequentially arranged on the frame 100 along the direction of film conveyance. The heat sealing mechanism 300 includes heat sealing molds arranged up and down, and a first driving component 310 connected to one of the heat sealing molds, which is used to drive one heat sealing mold to move, and the two heat sealing molds clamp the double-layer film so that the double-layer film forms a fusion position. Preferably, the two heat sealing molds are divided into a lower heat sealing mold 320 and an upper heat sealing mold 330, the lower heat sealing mold 320 is supported on the frame 100, and the upper heat sealing mold 330 is connected to the first driving component 310. The raw material of the double-layer film passes through the gap between the upper heat sealing mold 330 and the lower heat sealing mold 320, and the upper heat sealing mold 330 is driven downward by the first driving component 310 to complete the heat sealing of the film. Either the upper heat sealing mold 330 or the lower heat sealing mold 320 can achieve film hot melting by heating. The upper heat-sealing mold 330 and the lower heat-sealing mold 320 may also be ultrasonic welding molds.

[0038] Reference Figure 5 The point breaking mechanism 400 includes a support member 410, a point breaking die 420, and a second drive assembly 430. The point breaking die 420 is arranged with a plurality of point breaking teeth (not shown in the drawings). The second drive assembly 430 is connected to the point breaking die 420 and is used to drive the point breaking die 420 to clamp the double-layer film on the support member 410, so that intermittent point-shaped cuts are formed on the double-layer film, and the film bag can be torn apart along the point-shaped cuts. Preferably, the support member 410 is supported on the frame 100, and the point breaking die 420 is arranged above the support member 410. Specifically, the point breaking teeth can be formed into point breaking positions on the film bag by heating.

[0039] The squeezing and rubbing mechanism 500 includes a support roller 510, a pick roller 520, a third drive assembly 530, and a rotary drive member 540. The support roller 510 is mounted on the frame 100. The third drive assembly 530 is connected to the pick roller 520 and is used to drive the pick roller 520 and the support roller 510 to clamp the film bag. The rotary drive member 540 is connected to the pick roller 520 and is used to drive the pick roller 520 to rotate, causing the pick roller 520 to pull the film bag layer in contact with the pick roller along the dot-shaped cutting edge.

[0040] Specifically, the film bag heat-sealing equipment of the above-described embodiment heat-seals, breaks, and rubs the film by sequentially passing the double-layer film raw material through the gap formed by the upper heat-sealing die 330 and the lower heat-sealing die 320 of the heat-sealing mechanism 300, the gap formed by the support member 410 and the break die 420 of the break mechanism 400, and the gap formed by the support roller 510 and the rubbing roller 520 of the pressing and rubbing mechanism 500, and then the film is pulled and conveyed by the traction mechanism 200. The first drive assembly 310 drives the upper heat-sealing die 330 to press the film against the lower heat-sealing die 320, thereby forming a heat-sealing position on the film through heat fusion. The second drive assembly 430 drives the break die 420 to press the film against the support member 410. The break die 420 and the support member 410 cooperate with each other to form the break position on the film. When the film is transported to the pressing and rubbing mechanism 500 at the break point, the third driving assembly 530 drives the pick-up roller 520 to press the film against the support roller 510. The rotary driving member 540 drives the pick-up roller 520 to rotate. The rotation of the pick-up roller 520 causes the upper layer of film to move in an offset manner, so that the upper layer of film is separated along the break point, while the lower layer of film remains connected to the break point, forming a single-side opening structure for the film bag. This makes the film bag convenient for consumers to use.

[0041] Further, refer to Figure 2 The film bag heat-sealing apparatus further includes an electrostatic generator 600, disposed between the breaking mechanism 400 and the pressing and rubbing mechanism 500. The electrostatic generator 600 is configured to apply static electricity to the film bag. In this embodiment, after the film bag is broken, the electrostatic generator 600 applies static electricity to the bag, causing the bag to absorb a large amount of static electricity. This static electricity attracts the upper and lower layers of the film bag, preventing the broken portion from loosening.

[0042] Further, refer to Figure 5Mounting plates 101 extend upward from both sides of the frame 100. The support roller 510 is positioned between the two mounting plates 101. A slide 102 is provided on the inner side of the mounting plates 101, and the pick-up roller 520 is positioned between the two slides 102. The third drive assembly 530 comprises a lifting frame 531, a floating support member 532, and a drive member. Guide posts 534 are provided at both ends of the lifting frame 531 and are slidably connected to the outer side of the frame 100. Specifically, a limit block is provided on the outer side of the frame 100, and the limit block has a guide hole through which the guide post 534 passes. Preferably, two guide posts 534 are provided on the same side to enhance lifting stability. The drive member is connected to the guide posts 534 to drive them up and down. Specifically, the drive member can be a motorized mechanism, a pneumatic cylinder, or other drive mechanism. The floating support member 532 is provided on the lifting frame 531, and the slide 102 is connected to the floating support member 532. Furthermore, the floating support member 532 includes guide rods 5320, a support spring 5321, a base plate 5322, and a connecting screw 5323. The two guide rods 5320 pass through the lifting frame 531, and the base plate 5322 connects the bottom ends of the two guide rods 5320. The upper ends of the guide rods 5323 are provided with adjustment nuts. The support spring 5321 is mounted on the guide rods 5320. Connecting bolts 5323 are provided at both ends of the base plate 5322, and the connecting bolts 5323 are connected to the slide 102. By providing the floating support member 532, the film can be elastically squeezed between the roller 520 and the support tube 510, avoiding hard squeezing and better rubbing the film along the breakpoints.

[0043] The rotary drive member 540 includes a first gear 541 disposed on the pickup roller and a second gear 542 disposed on the mounting plate 101. The first gear 541 meshes with the second gear 542. The second gear 542 is connected to a motor (not shown). The motor drives the second gear 542 to rotate, which in turn drives the first gear 541 to rotate, thereby driving the pickup roller 520. Due to the use of gear meshing transmission, the first gear 541 and the second gear 542 remain meshed when the pickup roller 520 moves up and down.

[0044] Furthermore, refer to Figure 5 A toggle member 535 is connected to one of the guide posts 534. An eccentric sleeve 511 is provided at one end of the support roller 510. The eccentric sleeve 511 has a toggle slot 512. The toggle member 535 has a toggle portion that extends into the toggle slot 512, causing the guide post 534 to move up and down, and the toggle member 535 to toggle the support roller 510 for rotation. In this embodiment, when the guide post 534 moves downward, it drives the toggle member 535 to move together. The toggle member 535 toggle the eccentric sleeve 511 to rotate, thereby driving the support roller 510 to rotate. By controlling the rotation of the support roller 510 by raising and lowering it through the guide post 534, free rotation is avoided. This effectively controls the rotation speed difference between the pickup roller 520 and the support roller 510, and more smoothly breaks the upper film along the point breaking position.

[0045] Further, refer to Figure 4 The first drive assembly 310 and the second drive assembly 430 are lifting mechanisms with the same structure. The lifting mechanism includes two lifting columns 341, a top plate 342, an adjustment rod 343, a connecting plate 344, a first compression spring 345 and a connecting piece 346. The two lifting columns 341 are respectively located on both sides of the frame 100, and the top plate 342 connects the top ends of the two lifting columns 341. The two adjustment rods 343 pass through the top plate 342, and the upper ends of the adjustment rods 343 are provided with adjustment nuts. The connecting plate 344 connects the bottom ends of the two adjustment rods 343. The first compression spring 345 is sleeved on the adjustment rod 343, and the connecting piece 346 connects the connecting plate 344 and the upper heat sealing mold 330 or the point breaking mold 420. The lifting columns are connected to the lifting drive member to drive the lifting columns 341 to move up and down. This drives the first drive assembly 310 or the second drive assembly 430 to move up and down.

[0046] Further, refer to Figure 4 and Figure 6 The lifting mechanism further includes a pressure plate 347 and a second compression spring 348. The two ends of the pressure plate 347 are mounted on the two lifting posts 341. The second compression spring 348 is mounted on the lifting posts 341 and is located on the top side of the pressure plate 347. The lifting posts 341 are provided with two stoppers 349: one stopper 349 is positioned at the bottom side of the pressure plate 347, and the other stopper 349 is positioned at the top side of the second compression spring 348. Specifically, in this embodiment, when the lifting mechanism descends, the pressure plate 347 first presses the film. As the lifting mechanism continues to descend, the second compression spring 348 is compressed, allowing the lifting mechanism to continue descending, allowing the heat-sealing upper mold 330 or the point-breaking mold 420 to contact the film.

[0047] Going further, refer to Figures 2 to 4 The lower heat-sealing die 320 and the support member 510 are both slidably connected to the frame 100. This allows for adjustment of the position of the heat-sealing mechanism 300 and the breaking mechanism 400, as well as the spacing between them, to facilitate the formation of film bags of varying sizes. Specifically, a rack 110 is provided on the frame 100. Adjustment gears 321 and 511 are rotatably connected to the lower heat-sealing die 320 and the support member 510. These gears mesh with the rack 110, and an adjustment handle is connected to the adjustment gears 321 and 511. The adjustment handle rotates the adjustment gears, thereby moving the heat-sealing mechanism 300 and the breaking mechanism 400. To ensure that the lifting column 341 is connected to the lifting drive, the bottom end of the lifting column 341 is slidably connected to a guide rail 120, which is connected to the lifting drive. This ensures that the first drive assembly 310 and the second drive assembly 430 can connect to the lifting drive when adjusting the position of the heat-sealing mechanism 300 and the breaking mechanism 400.

[0048] Furthermore, refer to Figure 3The first drive assembly 310 , the second drive assembly 430 and the third drive assembly 530 are connected to the same lifting drive member 700 . The lifting drive member 700 of this embodiment drives the first drive assembly 310 , the second drive assembly 430 and the third drive assembly 530 .

[0049] Specifically, refer to Figure 3 The lifting drive member 700 includes two crank mechanisms 710 and a drive motor 701 connecting the two crank mechanisms 710. The two crank mechanisms 710 are respectively arranged on both sides of the frame 100. The crank mechanisms 710 include an eccentric wheel 711, a driving arm 712, a support arm 713, a first swing arm 714, a first connecting arm 715, a first lifting arm 716, a support bar 718, a second connecting arm 719, a second swing arm 720, and a second lifting arm 717.

[0050] The eccentric wheel 711 is connected to the drive motor 701. One end of the support arm 713 is rotatably connected to the outside of the frame 100, and the other end is rotatably connected to the drive arm 712. The other end of the drive arm 712 is connected to the eccentric wheel 711. Two first swing arms 714 are rotatably connected to the frame 100. The first swing arm 714 includes a first end and a second end. A first connecting arm 715 connects the first ends of the two first swing arms 714, and one end of the first connecting arm 715 is rotatably connected to the support arm 713. The second end of the first swing arm 714 is connected to the first lifting arm 716. A support bar 718 is rotatably connected to the upper end of the first lifting arm 716. The first drive assembly 310 and the second drive assembly 430 are connected to the support bar 718. Specifically, the guide rail 120 is disposed on the support bar 718. The second swing arm 720 is rotatably connected to the outside of the frame 100. The second swing arm 720 has a first end and a second end. The second connecting arm 719 is rotatably connected to the first end of the second swing arm 720 and the first swing arm 714, which is closer to the second connecting arm 719. The second lifting arm 717 is connected to the second end of the second swing arm 720. The third drive assembly 530 is connected to the second lifting arm 717. Specifically, the guide post 534 of the third drive assembly 530 is connected to the second lifting arm 717. The drive motor 701 drives the eccentric wheel 711 to rotate, thereby driving the drive arm 712 to move. The drive arm 712 drives the support arm 713 to swing, thereby driving the first swing arm 714 to swing through the first connecting arm 715. The swinging of the first swing arm 714 drives the first lifting arm 716 to move up and down. The first lifting arm 716 drives the support bar 718 to move up and down, thereby driving the lifting column 341 to move up and down. The swinging of the first swing arm 714 drives the second connecting arm 719 to move, which in turn drives the second swing arm 720 to swing. The second swing arm 720 drives the second lifting arm 717 to move upward and downward, thereby driving the guide post 534 to move upward and downward. Thus, a single power mechanism drives the first drive assembly 430 and the third drive assembly 530 to operate simultaneously.

[0051] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A film bag heat sealing device, characterized in that: It includes a frame, a traction mechanism, a heat sealing mechanism, a point-breaking mechanism and a pressing and rubbing mechanism; The traction mechanism is arranged on the frame and is used to traction the film for transportation; the heat sealing mechanism, the point breaking mechanism and the pressing mechanism are arranged on the frame in sequence along the direction of film transportation; the heat sealing mechanism includes upper and lower heat sealing molds, and a first driving component connected to one of the heat sealing molds, the first driving component is used to drive the heat sealing mold to move, so that the two heat sealing molds clamp the double-layer film, so that the double-layer film forms a fusion position; The point-breaking mechanism includes a support member, a point-breaking die, and a second drive assembly, wherein the point-breaking die is provided with a plurality of point-breaking teeth; the second drive assembly is connected to the point-breaking die, and is used to drive the point-breaking die to clamp the double-layer film on the support member, so that intermittent point-shaped cuts are formed on the double-layer film, and the film bag can be torn off along the point-shaped cuts; The pressing and rubbing mechanism includes a supporting roller, a rubbing roller, a third driving assembly, and a rotating driving member; the supporting roller is arranged on the frame, the third driving assembly is connected to the rubbing roller, and is used to drive the rubbing roller and the supporting roller to clamp the film bag; the rotating driving member is connected to the rubbing roller, and is used to drive the rubbing roller to rotate, so that the rubbing roller pulls off the layer of the film bag that contacts the rubbing roller along the dot-shaped cutting edge; Mounting plates extend upward on both sides of the frame, the support roller is arranged between the two mounting plates, a slide is provided on the inner side of the mounting plate, and the picking roller is arranged between the two slides; the third driving assembly includes a lifting frame, a floating support and a driving member; guide columns are provided at both ends of the lifting frame, and the guide columns are slidably connected to the outer side of the frame; the driving member is connected to the guide columns for driving the guide columns to move up and down; the floating support is provided on the lifting frame, and the slide is connected to the floating support; the rotating driving member includes a first gear provided on the picking roller and a second gear provided on the mounting plate, the first gear is meshed with the second gear, and the second gear is connected to the motor.

2. The film bag heat sealing device according to claim 1, characterized in that: It also includes an electrostatic generator, which is arranged between the breaking mechanism and the pressing and rubbing mechanism, and the electrostatic generator is used to input static electricity into the film bag.

3. The film bag heat sealing device according to claim 1, characterized in that: A toggle piece is also connected to the guide column, an eccentric sleeve is provided at one end of the support roller, the eccentric sleeve is provided with a toggle groove, and the toggle piece is provided with a toggle portion extending into the toggle groove, so that the guide column moves up and down, and the toggle piece toggle the support roller to rotate.

4. The film bag heat sealing device according to any one of claims 1 to 3, characterized in that: The two heat sealing molds are respectively a heat sealing lower mold and a heat sealing upper mold; the heat sealing lower mold is arranged on the frame, and the heat sealing upper mold is arranged above the heat sealing lower mold and connected to the first driving assembly; the support member is arranged on the frame, and the point-breaking mold is arranged above the support member.

5. The film bag heat sealing device according to claim 4, characterized in that: The first drive assembly and the second drive assembly are lifting mechanisms with the same structure, including two lifting columns, a top plate, an adjusting rod, a connecting plate, a first compression spring and a connecting piece; the two lifting columns are respectively located on both sides of the frame, and the top plate is connected to the top ends of the two lifting columns; the two adjusting rods pass through the top plate, and the upper ends of the adjusting rods are provided with adjusting nuts; the connecting plate connects the bottom ends of the two adjusting rods; the first compression spring is sleeved on the adjusting rod, and the connecting piece connects the connecting plate and the heat-sealing upper mold or the point-breaking mold; the lifting columns are connected to the lifting drive member for driving the lifting columns to move up and down.

6. The film bag heat sealing device according to claim 5, characterized in that: The lifting mechanism also includes a pressure plate and a second compression spring; the two ends of the pressure plate are sleeved on the two lifting columns, and the second compression spring is sleeved on the lifting columns and is located on the top side of the pressure plate; two limit members are provided on the lifting columns, one limit member is limited to the bottom side of the pressure plate, and the other limit member limits the top end of the second compression spring.

7. The film bag heat sealing device according to claim 5, characterized in that: The heat-sealing lower mold and the support member are both slidably connected to the frame, and a rack is provided on the frame. The heat-sealing lower mold and the support member are both rotatably connected to an adjusting gear, and the adjusting gear is engaged with the rack, and the adjusting gear is connected to an adjusting handle; the bottom end of the lifting column is slidably connected to a guide rail, and the guide rail is connected to the lifting drive member.

8. The film bag heat sealing device according to claim 1, characterized in that: The first drive assembly, the second drive assembly and the third drive assembly are connected to the same power mechanism, and the power mechanism drives the first drive assembly, the second drive assembly and the third drive assembly.

9. The film bag heat sealing device according to claim 8, characterized in that: The power mechanism includes two crank mechanisms and a driving motor connecting the two crank mechanisms; the two crank mechanisms are respectively arranged on both sides of the frame; the crank mechanism includes an eccentric wheel, a driving arm, a supporting arm, a first swing arm, a first connecting arm, a first lifting arm, a supporting bar, a second connecting arm, a second swing arm and a second lifting arm; the eccentric wheel is connected to the driving motor, one end of the supporting arm is rotatably connected to the outside of the frame, and the other end is rotatably connected to the driving arm, and the other end of the driving arm is connected to the eccentric wheel; the two first swing arms are rotatably connected to the frame, the first swing arm includes a first end and a second end, and the first connecting arm connects the two The first end of the first swing arm, one end of the first connecting arm is rotatably connected to the support arm; the second end of the first swing arm is connected to the first lifting arm, the support bar is rotatably connected to the upper end of the first lifting arm, and the first drive assembly and the second drive assembly are connected to the support bar; the second swing arm is rotatably connected to the outside of the frame, the second swing arm has a first end and a second end, the second connecting arm is rotatably connected to the first end of the second swing arm, and the first swing arm closer to the second connecting arm, the second lifting arm is connected to the second end of the second swing arm, and the third drive assembly is connected to the second lifting arm.

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