Film bag structure and film bag heat sealing equipment

Abstract

The invention belongs to the technical field of film bag forming, and particularly relates to a film bag structure and film bag heat sealing equipment which is used for forming the film bag structure. Comprising a rack, a traction mechanism, a heat sealing mechanism, a spot breaking mechanism and a pressing and twisting mechanism, the traction mechanism is arranged on the rack; the heat sealing mechanism, the spot breaking mechanism and the pressing and twisting mechanism are sequentially arranged on the machine frame in the film conveying direction. The heat sealing mechanism comprises heat sealing molds arranged up and down, and a first driving assembly connected with one of the heat sealing molds; the spot-breaking mechanism comprises a supporting piece, a spot-breaking die and a second driving assembly, and a plurality of spot-breaking teeth are arranged on the spot-breaking die; the second driving assembly is connected with the spot breaking die; the pressing and rubbing mechanism comprises a supporting roller, a rubbing roller, a third driving assembly and a rotary driving part; the supporting roller is arranged on the rack, the third driving assembly is connected with the rubbing roller, and the rotary driving piece is connected with the rubbing roller and used for driving the rubbing roller to rotate, so that the rubbing roller pulls off the layer, making contact with the rubbing roller, of the film bag along the point-shaped cut-off opening.

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 a film bag heat sealing device. 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 life, such as garbage bags, fresh-keeping bags, shopping mall packaging bags, etc. In order to facilitate the collection of film bags during production, the film bags are collected in rolls, so that they are easy to collect and use. Specifically, during the production of film bags, a double-layer film with upper and lower layers and only openings at both ends is used as a raw material. The double-layer film is heat-pressed or ultrasonically welded by a molding device to form a number of welded positions, and a tearing position is formed on the film by heat pressing or other methods on the side close to the welded position, so that the film can be torn along the break position to form a single film bag. For example, the Chinese utility model patent document with authorization announcement number CN214137570U discloses a production equipment for fresh-keeping bags, including a base, a supporting leg fixedly installed at the bottom of the base, a fixing plate, a casing and a unwinding drum fixedly installed above the base, a motor and a winding drum fixedly arranged above the fixing plate, a control panel fixedly arranged on the side of the casing, a power assembly, a heat sealing assembly and a dot-line assembly 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 fixings, a mounting plate is fixedly connected between the fixings, 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 and 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 passes through the first roller, the second roller and the third roller in sequence from the unwinding drum. When it reaches the fourth roller, the dotted and line nails are used to process easy-to-tear dotted lines on each tear of the fresh-keeping bag. The fifth roller and the seventh roller are then pressed against the sixth roller, so that the heating element is heated by the rotor under the control of the temperature controller, and 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] It can be seen that the film bag in the prior art adopts double-layer film heat sealing and point breaking, which causes the upper and lower sides of the formed film to be adsorbed together. After the film is torn, the fracture position will still be adsorbed together. Therefore, when opening the film bag, it needs to be rubbed open manually, which will cause inconvenience to 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 breaking position or the dotted line position, the bag mouth needs to be rubbed open manually.

[0006] To achieve the above-mentioned purpose, an embodiment of the present invention provides a film bag structure, comprising 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 break points, and a film bag is formed by tearing along the break points; the upper layer of the double-layer film is separated along the break points, and the bottom layer remains connected to the break points.

[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: multiple 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 formed due to the contact between the skin of the human finger and the film; therefore, when the upper film is contacted, 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, used for forming a film bag structure, the film bag heat sealing device comprises 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 and is used 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 film transportation direction; 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, a point breaking mold and a second driving component, and 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, 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;

[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 a 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 are extended upward on both sides of the frame, the supporting roller is arranged between the two mounting plates, a sliding seat is arranged on the inner side of the mounting plate, and the rubbing roller is arranged between the two sliding seats; the third driving assembly includes a lifting frame, a floating support and a driving member; guide columns are arranged 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 member is arranged on the lifting frame, and the sliding seat is connected to the floating support member; the rotating driving member includes a first gear arranged on the rubbing roller and a second gear arranged 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 driving assembly and the second driving 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 driving piece 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 columns and is located on the top side of the pressure plate; two limit members are provided on the lifting columns, one of the limit members is limited to the bottom side of the pressure plate, and the other limit member is limited to 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, 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 meshed 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 molds of the heat-sealing mechanism, the gap formed by the support member and the point-breaking mold 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 transported by pulling the traction mechanism. The first driving component drives the heat-sealing mold to clamp the film and hot-melt-form the heat-sealing position on the film; the second driving component drives the point-breaking mold to press the film against the supporting member, and the point-breaking mold and the supporting member cooperate with each other to form the point-breaking position on the film. When the point-breaking position is transported to the position of the pressing and rubbing mechanism, the third driving component drives the rubbing roller to press the film against the supporting roller, and the rotating driving member drives the rubbing roller to rotate. When the rubbing roller rotates, it drives the upper film to move displacedly, so that the upper film is separated along the point-breaking position, while the lower film is still 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative labor.

[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 a film bag heat sealing device provided in an embodiment of the present invention.

[0026] Figure 3 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 A structural diagram of the heat sealing mechanism and the point breaking mechanism of the film bag heat sealing equipment provided in an embodiment of the present invention.

[0028] Figure 5 A structural diagram of a compression and kneading frame of a film bag heat sealing device provided in an embodiment of the present invention.

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

[0030] Embodiments of the present invention are described in detail below, examples of which 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" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. 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, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to 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 device of this embodiment is used to form a film bag structure. The film bag structure includes a double-layer film 1 collected by a roll; the double-layer film 1 is hot-melt-formed with a plurality of heat-sealing positions 10 and a plurality of break positions 11, and is torn along the break positions 11 to form an independent film bag. The upper film of the double-layer film 1 is separated along the break positions 11, and the bottom film remains connected to the break positions 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 disposed 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, a plurality of traction roller assemblies 230, and a reeling mechanism 240. Since the traction mechanism 200 is a prior art in the art, this embodiment will not be described in detail. The roll of the double-layer film is placed on the unwinding mechanism 210, passes through the tensioning mechanism 220 and the plurality of traction roller assemblies 230, and the free end of the film is wound around the reeling mechanism 240. Therefore, the film is conveyed out through the unwinding mechanism 210, and the traction roller assembly 230 conveys the film, while the tensioning mechanism 220 tightens the film, and the reeling mechanism 240 reels 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 conveying. The heat sealing mechanism 300 includes heat sealing molds arranged up and down, and a first driving assembly 310 connected to one of the heat sealing molds, which is used to drive a 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 assembly 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 by the first driving assembly 310 to press down to complete the heat sealing of the film. Any of the upper heat sealing mold 330 and 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 mold 420 and a second driving assembly 430. The point breaking mold 420 is arranged with a plurality of point breaking teeth (not shown in the drawings). The second driving assembly 430 is connected to the point breaking mold 420, and is used to drive the point breaking mold 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 off along the point-shaped cuts. Preferably, the support member 410 is supported on the frame 100, and the point breaking mold 420 is arranged above the support member 410. Specifically, the point breaking teeth can form point breaking positions on the film bag by heating.

[0039] The pressing and rubbing mechanism 500 includes a supporting roller 510, a rubbing roller 520, a third driving assembly 530 and a rotating driving member 540. The supporting roller 510 is arranged on the frame 100, the third driving assembly 530 is connected to the rubbing roller 520, and is used to drive the rubbing roller 520 and the supporting roller 510 to clamp the film bag, and the rotating driving member 540 is connected to the rubbing roller 520, and is used to drive the rubbing roller 520 to rotate, so that the rubbing roller 520 pulls off the layer of the film bag that contacts the rubbing roller along the dot-shaped cutting opening.

[0040] Specifically, when the film bag heat sealing device of the above embodiment heat seals, breaks and rubs the film, the raw material of the double-layer film is sequentially passed through the gap formed by the upper heat sealing mold 330 and the lower heat sealing mold 320 of the heat sealing mechanism 300, the gap formed by the support member 410 and the break mold 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 the film is transported by pulling by the traction mechanism 200. The first driving component 310 drives the upper heat sealing mold 330 to press the film against the lower heat sealing mold 320, and the heat sealing position is formed by hot melt on the film. The second driving component 430 drives the break mold 420 to press the film against the support member 410, and the break mold 420 and the support member 410 cooperate with each other to form the break position on the film. When the break point is conveyed to the position of the pressing and rubbing mechanism 500, the third driving assembly 530 drives the rubbing roller 520 to press the film onto the supporting roller 510, and the rotating driving member 540 drives the rubbing roller 520 to rotate. The rubbing roller 520 drives the upper film to move displacedly when rotating, so that the upper film is separated along the break point, while the lower film is still connected to the break point, so that the film bag forms a single-side opening structure, thereby forming a film bag that is convenient for consumers to use.

[0041] Further, refer to Figure 2 The film bag heat sealing device further includes an electrostatic generator 600, which is disposed between the point breaking mechanism 400 and the pressing and rubbing mechanism 500. The electrostatic generator 600 is used to input static electricity into the film bag. In this embodiment, after the film bag is point broken, the electrostatic generator 600 inputs static electricity into the film bag, so that the film bag absorbs a large amount of static electricity, and the upper and lower layers of the film bag are mutually attracted by static electricity, thereby avoiding the problem of the broken part being loose.

[0042] Further, refer to Figure 5, mounting plates 101 are extended upwardly on both sides of the frame 100, the support roller 510 is arranged between the two mounting plates 101, a slide 102 is arranged on the inner side of the mounting plate 101, and the rubbing roller 520 is arranged between the two slides 102. The third driving assembly 530 includes a lifting frame 531, a floating support member 532 and a driving member. Guide pillars 534 are arranged at both ends of the lifting frame 531, and the guide pillars 534 are slidably connected to the outside of the frame 100. Specifically, a limit block is arranged on the outside of the frame 100, and the limit block is provided with a guide hole, and the guide pillar 534 passes through the guide hole. Preferably, the guide pillars 534 on the same side are two pieces, so as to increase the stability of lifting. The driving member is connected to the guide pillar 534, and is used to drive the guide pillar 534 to move up and down. Specifically, the driving member can be a driving mechanism such as an electric mechanism and a cylinder. The floating support member 532 is arranged on the lifting frame 531, and the slide 102 is connected to the floating support member 532. Furthermore, the floating support member 532 includes a guide rod 5320, a support spring 5321, a bottom plate 5322 and a connecting screw 5323. The two guide rods 5320 pass through the lifting frame 531, the bottom plate 5322 connects the bottom ends of the two guide rods 5320, and the upper end of the guide rod 5323 is provided with an adjusting nut. The support spring 5321 is sleeved on the guide rod 5320. Connecting bolts 5323 are provided at both ends of the bottom plate 5322, and the connecting bolts 5323 are connected to the slide seat 102. By providing the floating support member 532, the rubbing roller 520 and the support tube 510 can realize elastic extrusion of the film, avoid hard extrusion, and can better rub the film along the point break position.

[0043] The rotary drive member 540 includes a first gear 541 disposed on the pick-up 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 in the drawings). The motor drives the second gear 542 to rotate. The second gear 542 then drives the first gear 541 to rotate, thereby driving the pick-up roller 520 to rotate. Since the gear meshing transmission is adopted, the first gear 541 and the second gear 542 can still be kept meshed when the pick-up roller 520 moves up and down.

[0044] Furthermore, refer to Figure 5 , a toggle member 535 is also 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 is provided with a toggle groove 512, and the toggle member 535 is provided with a toggle portion extending into the toggle groove 512, so that the guide post 534 moves up and down, and the toggle member 535 toggle the support roller 510 to rotate. In this embodiment, when the guide post 534 moves downward, the toggle member 535 is driven to move together, and the toggle member 535 toggle the eccentric sleeve 511 to rotate, thereby driving the support roller 510 to rotate, and the support roller 510 is controlled to rotate by the guide post 534 when the support roller 510 is lifted and lowered to avoid free rotation, so that the rotation speed difference between the rubbing roller 520 and the support roller 510 can be well controlled, so that the upper film can be broken along the point breaking position more smoothly.

[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 column is connected to the lifting driving member, which is used to drive the lifting column 341 to move up and down. Thereby driving the first drive assembly 310 or the second drive assembly 430 to rise and fall.

[0046] Further, refer to Figure 4 and Figure 6 , the lifting mechanism also includes a pressing plate 347 and a second compression spring 348. The two ends of the pressing plate 347 are sleeved on the two lifting columns 341, and the second compression spring 348 is sleeved on the lifting columns 341 and is located on the top side of the pressing plate 347. Two limiting members 349 are provided on the lifting columns 341, one limiting member 349 is limited on the bottom side of the pressing plate 347, and the other limiting member 349 limits the top of the second compression spring 348. Specifically, in this embodiment, when the lifting mechanism descends, the pressing plate 347 first presses the film, and when the lifting mechanism continues to descend, the second compression spring 348 is compressed, so that the lifting mechanism can continue to descend, so that the heat-sealing upper mold 330 or the point-breaking mold 420 contacts the film.

[0047] Further, refer to Figures 2 to 4 , the lower heat sealing mold 320 and the support member 510 are both slidably connected to the frame 100. Therefore, the position of the heat sealing mechanism 300 and the point breaking mechanism 400, as well as the distance between the two, can be adjusted, thereby busy with the molding of film bags of different sizes. Specifically, a rack 110 is provided on the frame 100, and the lower heat sealing mold 320 and the support member 510 are both rotatably connected with adjustment gears 321, 511, and the adjustment gears 321, 511 are meshed with the rack 110, and the adjustment gears 321, 511 are connected with an adjustment handle. The adjustment gear is rotated by the adjustment handle, thereby pushing the heat sealing mechanism 300 and the point breaking mechanism 400 to move. In order 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, and the guide rail 120 is connected to the lifting drive. Therefore, when adjusting the position of the heat sealing mechanism 300 and the point breaking mechanism 400, it is ensured that the first drive assembly 310 and the second drive assembly 430 can be connected to the lifting drive.

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

[0049] Specifically, refer to Figure 3 The lifting drive member 700 includes two crank mechanisms 710 and a driving 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 mechanism 710 includes an eccentric wheel 711, a driving arm 712, a supporting arm 713, a first swing arm 714, a first connecting arm 715, a first lifting arm 716, a supporting 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 driving motor 701, one end of the supporting arm 713 is rotatably connected to the outside of the frame 100, and the other end is rotatably connected to the driving arm 712, and the other end of the driving arm 712 is connected to the eccentric wheel 711. The 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, the 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 supporting arm 713. The second end of the first swing arm 714 is connected to the first lifting arm 716, the supporting bar 718 is rotatably connected to the upper end of the first lifting arm 716, and the first driving assembly 310 and the second driving assembly 430 are connected to the supporting bar 718. Specifically, the guide rail 120 is arranged on the supporting 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 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 driving assembly 530 is connected to the second lifting arm 717. Specifically, the guide column 534 of the third driving assembly 530 is connected to the second lifting arm 717. The driving motor 701 drives the eccentric wheel 711 to rotate, thereby pushing the driving arm 712 to move. The driving arm 712 drives the support arm 713 to swing, thereby pushing the first swing arm 714 to swing through the first connecting arm 715. The swing of the first swing arm 714 pushes the first lifting arm 716 to move up and down. The first lifting arm 716 drives the support bar 718 to rise and fall, thereby driving the lifting column 341 to rise and fall. Under the swing of the first swing arm 714, the second connecting arm 719 can be driven to move, and the second swing arm 720 can be pushed to swing, and the second swing arm 720 can drive the second lifting arm 717 to rise and fall, thereby pushing the guide column 534 to rise and fall. Thus, one power mechanism can drive the first driving assembly, the second driving assembly 430 and the third driving 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 protection scope of the present invention.

Claims

1. A film bag structure, comprising a double-layer film collected by a roll; the double-layer film is hot-melt-formed with a plurality of heat-sealing positions and a plurality of point-breaking positions, and the film bag is formed by tearing along the point-breaking positions; characterized in that: The upper film of the double-layer film is separated along the point breaks, and the bottom layer remains connected to the point breaks.

2. A film bag heat sealing device, characterized in that: Used to form the film bag structure according to claim 1, the film bag heat sealing equipment comprises 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 used 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 film transportation direction; 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 comprises a support, a point breaking die and a second driving assembly, wherein the point breaking die is arranged with a plurality of point breaking teeth; the second driving 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, so that intermittent point-shaped cutting openings are formed on the double-layer film, and the film bag can be torn off along the point-shaped cutting openings; 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 a layer of the film bag that contacts the rubbing roller along the dot-shaped cutting edge.

3. The film bag heat sealing device according to claim 2, characterized in that: It 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.

4. The film bag heat sealing device according to claim 2, characterized in that: Mounting plates are extended upward on both sides of the frame, the supporting roller is arranged between the two mounting plates, a sliding seat is arranged on the inner side of the mounting plate, and the rubbing roller is arranged between the two sliding seats; the third driving assembly includes a lifting frame, a floating support and a driving member; guide posts are arranged at both ends of the lifting frame, and the guide posts are slidably connected to the outer side of the frame; the driving member is connected to the guide posts for driving the guide posts to move up and down; the floating support member is arranged on the lifting frame, and the sliding seat is connected to the floating support member; the rotating driving member includes a first gear arranged on the rubbing roller and a second gear arranged on the mounting plate, the first gear is meshed with the second gear, and the second gear is connected to the motor.

5. The film bag heat sealing device according to claim 4, 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.

6. The film bag heat sealing device according to any one of claims 2 to 5, 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, the heat-sealing upper mold is arranged above the heat-sealing lower mold, and is 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.

7. The film bag heat sealing device according to claim 6, characterized in that: The first driving assembly and the second driving 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 driving piece for driving the lifting column to move up and down.

8. The film bag heat sealing device according to claim 7, 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 column and is located on the top side of the pressure plate; two limiting members are provided on the lifting column, one limiting member is limited to the bottom side of the pressure plate, and the other limiting member limits the top end of the second compression spring.

9. The film bag heat sealing device according to claim 7, characterized in that: The lower heat sealing mold and the support member are both slidably connected to the frame, 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 meshed 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.

10. 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.

11. The film bag heat sealing device according to claim 10, 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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