Film strapping machine

Abstract

The utility model discloses a thin film strapping machine which comprises a feeding conveying belt, an overturning clamping mechanism, a box pile pushing mechanism, a strapping mechanism and a film feeding mechanism. The feeding conveying belt conveys boxes to the bundling mechanism. The film feeding mechanisms comprise the upper film feeding mechanism and the lower film feeding mechanism, the bundling mechanism is arranged at the tail end of the feeding conveying belt, and films supplied by the two film feeding mechanisms are connected to the bundling mechanism; the box pile pushing mechanism pushes a box pile formed by a plurality of boxes to pass through the bundling mechanism, the bundling mechanism is provided with a lifting limiting plate, a bundling and cutting mechanism, an air blowing mechanism and a lifting film pressing mechanism, the bundling and cutting mechanism comprises a fixing plate and a heating strip, and the driving push rod drives the pressing plate to ascend and descend. The heating strip is used for heating films to enable the contact positions of the tail ends of the upper film and the lower film to be thermally combined and cut off, the lifting limiting plate is used for pressing a box stack to prevent the box stack from tilting, and the blowing mechanisms are arranged above the two sides of the fixing plate and used for blowing the films open.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of bundling machine, specifically point to a film bundling machine. BACKGROUND

[0002] In the field of modern logistics and packaging, single cartons are widely used as packaging units due to their convenience and practicality. However, in some cases, in order to improve the efficiency and convenience of material distribution, it is necessary to combine and package multiple cartons. As an economical and efficient packaging method, film bundling is often used to combine 5 or 10 cartons into a group to meet the needs of different occasions.

[0003] Although the film bundling technology has been widely used in the packaging field, there are still some technical challenges and limitations in the actual operation of the existing film bundling machine. First of all, the process of manually replacing the film roll is not only difficult but also time-consuming, which directly affects the work efficiency of the packaging line and the production cost. Secondly, poor film connection effect will affect the sealing and appearance of the package, which may affect the market competitiveness of the product. In addition, during the bundling process, the control of the tightness of the bundling has always been a technical problem. Too tight bundling may damage the product, while too loose bundling cannot ensure the stability and safety of the carton group, which seriously affects the consistency and reliability of the bundling effect. SUMMARY

[0004] In order to solve the above problems in the prior art, the utility model provides a film bundling machine which can automatically replace the film roll, optimize the film connection process, and adjust the tightness of the bundling.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows: a film strapping machine, comprising a feed conveyor belt, a flipping and clamping mechanism, a box stack pushing mechanism, a strapping mechanism and a film feeding mechanism; the feed conveyor belt sends the boxes to the strapping mechanism, and the flipping and clamping mechanism and the box stack pushing mechanism are provided above the feed conveyor belt; the film feeding mechanism is provided with two upper and lower ones, which are respectively located above and below the feed conveyor belt, and the strapping mechanism is provided at one end of the feed conveyor belt, and the films supplied by the two film feeding mechanisms are connected to the strapping mechanism; the box stack pushing mechanism pushes the box stack formed by several boxes through the strapping mechanism The strapping mechanism is provided with a lifting and limiting plate, a strapping and cutting mechanism, an air blowing mechanism and a lifting and film pressing mechanism. The strapping and cutting mechanism includes a fixed plate and a heating strip. The heating strip is arranged above the fixed plate. The lifting and film pressing mechanism includes a driving push rod and a pressure plate. The driving push rod drives the pressure plate to press down the film above the box stack and press it together with the film below onto the fixed plate. The heating strip is used to heat the film so that the upper and lower film ends contact at the position where they are hot and cut. The lifting and limiting plate is used to press the box stack to prevent it from warping. The air blowing mechanism is arranged above both sides of the fixed plate to blow open the film to prevent the film from sticking to the fixed plate after being heated.

[0006] Furthermore, the film feeding mechanism includes a reel-out device, a film splicing mechanism, a film driving mechanism, a reel-out buffer mechanism and a film clamping mechanism, and the reel-out device, the film splicing mechanism, the film driving mechanism, the reel-out buffer mechanism and the film clamping mechanism are all installed on a mounting panel, and the mounting panel is provided on one side of the feed conveyor belt;

[0007] The film splicing mechanism includes a movable clamping rod, a fixing rod, a film splicing fixing plate, a film splicing cutting mechanism and a film splicing swing rod; the film splicing fixing plate is fixedly mounted on the mounting panel, the film splicing cutting mechanism is provided at both ends of the film splicing fixing plate, the movable clamping rod and the fixing rod are provided below the film splicing fixing plate, and the film splicing swing rod is provided above the film splicing fixing plate;

[0008] A film roll is fixedly mounted on each of the two unwinders, and relative rotation between the film roll and the unwinder does not occur. The unwinder is mounted on the mounting panel via an unwinding shaft. When the film is pulled out from the film roll, the unwinder is driven to rotate. The unwinding shaft is connected to a damping mechanism on the back of the mounting panel.

[0009] The film of one film roll passes through the film connecting mechanism, the film driving mechanism, the film unwinding buffer mechanism and the film clamping mechanism, and finally reaches the bundling mechanism to be connected with the film supplied by the other film supply mechanism; the film of the other film roll passes through the film connecting fixed plate from above and downwards between the movable clamping rod and the fixed rod, the movable clamping rod presses the film on the fixed rod, and the movable clamping rod and the fixed rod clamp the film to prevent the standby film from falling, and the movable clamping rod is driven by a cylinder.

[0010] The film connecting and cutting mechanism can press and heat the overlapped film, cut off the excess film, and cut off the overlapped film.

[0011] The film connecting swing rod is used to push the film after the film is connected to avoid interference.

[0012] Further, the film driving mechanism comprises a driving roller and a movable roller installed on the mounting panel, the driving roller and the movable roller are in close contact, the film passes through between the driving roller and the movable roller, the driving roller and the movable roller are rotatable, the rotation shaft of the driving roller is connected with a driving motor through a belt transmission at the other end of the mounting panel, the driving motor drives the driving roller to rotate through the belt transmission, and the film on the film roll is pulled out.

[0013] Further, the loose roll buffering mechanism comprises a loose roll swing lever and first rollers, a plurality of the first rollers are installed on the installation panel, one end of the loose roll swing lever is installed on the installation panel through a rotating shaft, the loose roll swing lever can swing up and down around the rotating shaft, a plurality of second rollers are installed on the loose roll swing lever, the film passing through the loose roll buffering mechanism is alternately wound around the first rollers and the second rollers, when the driving push rod drives the pressing plate to press the film above the box stack to be bundled and wrapped, the loose roll swing lever can be lifted to release part of the film wound on the first rollers and the second rollers to be pulled forward, avoiding that the film roll is directly pulled to cause too large pulling resistance, the rotating shaft of the loose roll swing lever is connected with a swing detection lever and a hook hole plate on the back of the installation panel, the back of the installation panel is provided with two fixed hook hole plates, the fixed hook hole plate and the two hook hole plates are connected through two first tension springs, so that the loose roll swing lever is automatically reset to a fixed angle; hooks are arranged at two ends of the first tension spring, a plurality of through holes are arranged on the hook hole plate and the fixed hook hole plate, the hooks of the first tension spring can be hooked on different through holes to adjust the elasticity of the first tension spring; an arc-shaped detection piece is arranged at the tail end of the swing detection lever, a detection sensor is arranged on the back of the installation panel, and the detection sensor is electrically connected with the driving motor. When the loose roll swing lever is pulled upward during the bundling and wrapping, the swing detection lever drives the arc-shaped detection piece to rotate upward until the detection sensor cannot detect the arc-shaped detection piece, at this time, the driving motor drives the driving roller to pull the film, and then drives the loose roll to rotate, the loose roll swing lever is reset and gradually lowered under the action of the tension spring, and drives the swing detection lever to rotate, the arc-shaped detection piece is detected again by the detection sensor, when the reset is completed, the arc-shaped detection piece is no longer detected by the detection sensor, at this time, the driving motor stops pulling the film, and the loose roll stops rotating.

[0014] Further, the damping mechanism comprises a damping belt, a second tension spring and a hanging rod, a circumferential groove is arranged on the side surface of the tail end of the loose roll shaft, the middle part of the damping belt is embedded in the groove, the hanging rod is fixedly arranged on the back of the installation panel, and the two ends of the damping belt are connected with the two hanging rods through two second tension springs. The second tension spring tightens the damping belt, and the damping belt is used for providing resistance to the rotation of the loose roll shaft, avoiding that the rotation speed is too fast, causing that the loose roll continues to rotate when the pulling of the film is stopped, and too much film is pulled out.

[0015] Further, a tension adjustment hole plate is installed on one of the hanging rods, a plurality of through holes are arranged on the tension adjustment hole plate, and the hooks of the second tension spring can be selectively hung on different through holes. By changing the length of the second tension spring, the tightness of the damping belt is changed.

[0016] Further, the unwinding shaft of the unwinder is provided with a detection gear disc on the back of the mounting panel, the back of the mounting panel is provided with a gear disc detection sensor, the gear disc detection sensor is aligned with the gear at the edge of the detection gear disc, when the detection gear disc rotates with the rotating shaft of the unwinder, the gear of the detection gear disc repeatedly blocks the gear disc detection sensor, and the gear disc detection sensor can detect whether the detection gear disc rotates.

[0017] The thin film bundling machine has the following advantages: through the cooperative work of the feeding conveying belt, the box stack pushing mechanism and the bundling mechanism, continuous and efficient thin film bundling operation of the box stack composed of multiple boxes can be realized, the packaging production efficiency is improved, and large-scale production requirements are met; the unwinder cooperates with the damping mechanism to effectively control the unwinding speed, prevent unstable supply caused by too fast or too slow unwinding of the thin film, the damping belt provides appropriate resistance with the help of the second tension spring, avoids excessive pulling out of the thin film caused by inertial rotation of the unwinder, and the damping size can be adjusted through the tightness adjusting hole plate to adapt to different thin film materials and thicknesses; the film connecting mechanism can realize accurate butt joint and switching of the thin film, when the film roll of one unwinder is exhausted, the gear disc detection sensor can detect in time and trigger the film connecting mechanism to work, the movable clamping rod, the fixed rod, the film connecting fixed plate and the film cutting mechanism cooperate with each other to connect the thin film of the new film roll with the old film, ensure continuous bundling operation, and reduce downtime caused by film replacement; the lifting and pressing film mechanism, the heating strip and the blowing mechanism in the bundling mechanism jointly act to ensure the bundling quality; the driving push rod drives the pressing plate to tightly adhere the upper and lower thin films to the box stack on the fixed plate, the heating strip makes the thin film heat seal firmly and cut neatly, and the blowing mechanism prevents the thin film from adhering to the fixed plate, so that the appearance of the packaged product is neat after bundling. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 is a structural schematic view of the thin film bundling machine of the utility model;

[0019] Figure 2 Fig. 2 is a use state schematic view of the thin film bundling machine of the utility model;

[0020] Figure 3 Fig. 3 is a structural schematic view of the unwinding buffer mechanism of the thin film bundling machine of the utility model;

[0021] Figure 4The utility model discloses a damping mechanism's structure schematic drawing of film bundling machine.

[0022] Wherein, 1 - feed conveyor belt, 11 - brush board, 2 - overturning clamping mechanism, 3 - box stack pushing mechanism, 4 - bundling mechanism, 41 - lifting limiting plate, 42 - bundling cutting mechanism, 421 - fixed plate, 43 - blowing mechanism, 44 - lifting film pressing mechanism, 441 - drive push rod, 442 - pressing plate, 5 - film supply mechanism, 51 - unwinder, 511 - unwinding shaft, 5111 - groove, 512 - damping belt, 513 - second tension spring, 514 - hanging rod, 5141 - tightness adjusting hole plate, 515 - detection toothed disc, 516 - toothed disc detection sensor, 53 - film receiving mechanism, 531 - movable clamping rod, 532 - fixed rod, 533 - film receiving fixed plate, 534 - film receiving cutting mechanism, 535 - film receiving swing rod, 54 - film drive mechanism, 541 - drive roller, 542 - drive motor, 543 - movable roller, 55 - unwinding buffer mechanism, 551 - unwinding swing rod, 5511 - second roller, 552 - first roller, 553 - swing detection rod, 5531 - arc detection sheet, 554 - hook hole plate, 555 - fixed hanging hole plate, 556 - first tension spring, 557 - detection sensor, 56 - film clamping mechanism, 57 - mounting panel. DETAILED DESCRIPTION

[0023] The technical scheme of the utility model will be described clearly and completely below in connection with the drawings, and obviously, the described embodiments are a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the range of protection of the utility model.

[0024] As Figures 1-4The utility model discloses a kind of film bundling machines, including feed conveyor belt 1, turnover clamping mechanism 2, box stack pushing mechanism 3, bundling mechanism 4 and film supply mechanism 5;The box is sent to the bundling mechanism 4 by the feed conveyor belt 1, turnover clamping mechanism 2 and box stack pushing mechanism 3 are equipped above the feed conveyor belt 1;Two of the film supply mechanism 5 are equipped, and are located above and below the feed conveyor belt 1 respectively, the bundling mechanism 4 is located at one end of the feed conveyor belt 1, and the film supplied by two film supply mechanisms 5 is connected at the bundling mechanism 4;The box stack pushing mechanism 3 pushes the box stack formed by several boxes to pass through the bundling mechanism 4, the bundling mechanism 4 is equipped with lifting limiting plate 41, bundling cutting mechanism 42, blowing mechanism 43 and lifting film pressing mechanism 44, the bundling cutting mechanism 42 includes fixed plate 421 and heating strip, the heating strip is equipped above the fixed plate 421, the lifting film pressing mechanism 44 includes driving push rod 441 and pressing plate 442, the driving push rod 441 drives the pressing plate 442 to press the film above box stack and the film below to the fixed plate 421, the heating strip is used to heat the film to make the upper and lower film end contact position heat sealing and cutting, the lifting limiting plate 41 is used to press the box stack to prevent from being warped, the blowing mechanism 43 is equipped above both sides of the fixed plate 421, for blowing open film, avoid that film is adhered to the fixed plate 421 after being heated.

[0025] The brush plate 11 is provided above the feed conveyor belt 1, and the brush plate 11 is provided with brush hairs at the bottom for pressing the box on the feed conveyor belt 1.

[0026] Further, the film supply mechanism 5 includes a film unwinder 51, a film receiving mechanism 53, a film driving mechanism 54, a film unwinding buffer mechanism 55, and a film clamping mechanism 56, wherein the film unwinder 51, the film receiving mechanism 53, the film driving mechanism 54, the film unwinding buffer mechanism 55, and the film clamping mechanism 56 are all mounted on a mounting panel 57, and the mounting panel 57 is provided on one side of the feed conveyor belt 1.

[0027] The film receiving mechanism 53 includes a movable clamping rod 531, a fixed rod 532, a film receiving fixed plate 533, a film receiving cutting mechanism 534, and a film receiving swing rod 535, wherein the film receiving fixed plate 533 is fixedly mounted on the mounting panel 57, both ends of the film receiving fixed plate 533 are provided with the film receiving cutting mechanism 534, the film receiving fixed plate 533 is provided below the movable clamping rod 531 and the fixed rod 532, and the film receiving fixed plate 533 is provided above the film receiving swing rod 535.

[0028] Two said loose roll 51 are fixedly installed with film roll, film roll and the loose roll 51 between do not occur relative rotation, the loose roll 51 is installed on the installation panel 57 through loose roll shaft 511, when the film is pulled out from the film roll and drives the loose roll 51 rotation, the loose roll shaft 511 is connected with damping mechanism on the back of the installation panel 57;

[0029] The film of one of the film rolls passes through the film receiving mechanism 53, then passes through the film driving mechanism 54, the loose roll buffer mechanism 55 and the film clamping mechanism 56, and finally reaches the bundling mechanism 4 and is connected with the film supplied by the other film supply mechanism 5; the film of the other film roll passes over the film receiving fixed plate 533 from above, and passes through between the movable clamping rod 531 and the fixed rod 532 downward, the movable clamping rod 531 presses the film on the fixed rod 532, the movable clamping rod 531 and the fixed rod 532 clamp the film to prevent the standby film from falling off, and the movable clamping rod 531 is driven by a gas cylinder.

[0030] The film receiving cutting mechanism 534 can press and heat the overlapped film, cut off the excess film, and the like.

[0031] The film receiving swing rod 535 is used to push the film after receiving to avoid interference.

[0032] Further, the film driving mechanism 54 includes a driving roller 541 and a movable roller 543 installed on the installation panel 57, the driving roller 541 and the movable roller 543 are in close contact, the film passes between the driving roller 541 and the movable roller 543, the driving roller 541 and the movable roller 543 are rotatable, the rotating shaft of the driving roller 541 is connected with a driving motor 542 through a belt transmission on the other end of the installation panel 57, the driving motor 542 drives the driving roller 541 to rotate through the belt transmission, and the film on the film roll is pulled out.

[0033] Furthermore, the unwinding buffer mechanism 55 includes an unwinding swing rod 551 and a first roller 552, and a plurality of the first rollers 552 are installed on the installation panel 57. One end of the unwinding swing rod 551 is installed on the installation panel 57 through a rotating shaft. The unwinding swing rod 551 can swing up and down around the rotating shaft. A plurality of second rollers 5511 are provided on the unwinding swing rod 551. The film passing through the unwinding buffer mechanism 55 alternately bypasses the first roller 552 and the second roller 5511. When the driving push rod 441 drives the pressure plate 442 to press down the film above the box stack for bundling and wrapping, the unwinding swing rod 551 can be lifted up to release part of the film wound on the first roller 552 and the second roller 5511 for pulling forward, so as to avoid directly pulling the film roll and causing excessive resistance required for pulling. The rotating shaft of the unwinding swing rod 551 is connected to a swing detection rod 553 and a hook hole plate 554 on the back of the mounting panel 57. Two fixed hanging hole plates 555 are provided on the back of the mounting panel 57. The fixed hanging hole plates 555 and the two hook hole plates 554 are connected by two first tension springs 556, so that the unwinding swing rod 551 is automatically reset to a fixed angle; hooks are provided at both ends of the first tension spring 556, and a number of through holes are provided on the hook hole plate 554 and the fixed hanging hole plate 555. The hooks of the first tension spring 556 can hook different through holes to adjust the elastic force of the first tension spring 556; an arc-shaped detection piece 5531 is provided at the end of the swing detection rod 553, and a detection sensor 557 is provided on the back of the mounting panel 57. The detection sensor 557 is electrically connected to the drive motor 542. The unwinding swing rod 551 is pulled upward when the film is bundled, and the swing detection rod 553 drives the arc detection piece 557 to rotate upward until the detection sensor 557 can no longer detect the arc detection piece 557. At this time, the drive motor 542 drives the drive roller 541 to pull the film, thereby driving the unwinder 51 to rotate. The unwinding swing rod 551 is reset and gradually lowered under the action of the tension spring 556, while driving the swing detection rod 553 to rotate. The arc detection piece 557 is detected by the detection sensor 557 again. When it is fully reset, the arc detection piece 557 is no longer detected by the detection sensor 557. At this time, the drive motor 542 is controlled to stop pulling the film, and the unwinder 51 stops rotating.

[0034] Further, the damping mechanism comprises a damping band 512, a second tension spring 513 and a hanging rod 514. The side of the end of the unwinding shaft 511 is provided with a surrounding groove 5111, the middle part of the damping band 512 is embedded in the groove 5111, the hanging rod 514 is fixedly arranged on the back of the mounting panel 57, and the two ends of the damping band 512 are connected to the two hanging rods 514 through two second tension springs 513 respectively. The second tension spring 513 tightens the damping band 512, and the damping band 512 is used to provide resistance to the rotation of the unwinder 51, so as to avoid the rotation speed being too fast, causing the unwinder 51 to continue to rotate when the film is pulled to stop, resulting in too much film being pulled out.

[0035] Further, a tension adjustment hole plate 5141 is arranged on one of the hanging rods 514, a plurality of through holes are arranged on the tension adjustment hole plate 5141, and the hooks of the second tension springs 513 can be selectively hung on different through holes. By changing the length of the second tension spring 513, the tightness of the damping band 512 is changed.

[0036] Further, the unwinder 51 is provided with a detection gear disc 515 on the back of the mounting panel 57, the back of the mounting panel 57 is provided with a gear disc detection sensor 516, the gear disc detection sensor 516 is aligned with the teeth at the edge of the detection gear disc 515, and when the detection gear disc 515 rotates with the rotating shaft of the unwinder 51, the teeth of the detection gear disc 515 repeatedly block the gear disc detection sensor 516. The gear disc detection sensor 516 can detect whether the detection gear disc 515 rotates. When the driving motor 542 is pulling the film, if the gear disc detection sensor 516 cannot detect that the detection gear disc 515 rotates, it can be judged that the film roll on the unwinder 51 has run out of film, and at this time, the film receiving mechanism 53 is started. The gear disc detection sensor 516 detects the alternating change of teeth and gaps, and the more the number of teeth at the edge of the detection gear disc 515, the higher the detection accuracy.

[0037] The thin film bundling machine has the following beneficial effects: through the cooperative work of the feeding conveying belt, the box stack pushing mechanism and the bundling mechanism, continuous and efficient thin film bundling operation can be realized on the box stack composed of multiple boxes, the packaging production efficiency is improved, and large-scale production requirements are met; the unwinding device cooperates with the damping mechanism to effectively control the unwinding speed, prevent unstable supply caused by too fast or too slow unwinding of the thin film, the damping belt provides appropriate resistance with the help of the second tension spring, avoids excessive pulling out of the thin film caused by inertial rotation of the unwinding device, and the damping size can be adjusted through the tightness adjusting hole plate to adapt to different thin film materials and thicknesses; the film connecting mechanism can realize accurate butt joint and switching of the thin film, when the film roll of one unwinding device is exhausted, the toothed disc detection sensor can detect in time and trigger the film connecting mechanism to work, the movable clamping rod, the fixed rod, the film connecting fixed plate and the film cutting mechanism cooperate with each other to connect the new film roll with the old film, ensure continuous bundling operation, and reduce downtime caused by film replacement; the lifting and pressing film mechanism, the heating strip and the blowing mechanism in the bundling mechanism jointly act to ensure the bundling quality; the driving push rod drives the pressing plate to tightly adhere the upper and lower thin films to the box stack on the fixed plate, the heating strip makes the thin film heat sealing firm and cutting neat, and the blowing mechanism prevents the thin film from adhering to the fixed plate, so that the appearance of the packaged product after bundling is neat; the unwinding swing rod and the roller thereon can release the thin film in time when the driving push rod acts, avoid generating too large resistance by directly pulling the film roll, ensure stable and uniform tension of the thin film, prevent the thin film from being stretched and deformed or broken, and improve the stability and reliability of bundling.

[0038] The above describes the utility model and its implementation mode, which is not limited, and the drawings only show one of the implementation modes of the utility model, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired thereby, without departing from the creative purpose of the utility model, similar structure modes and embodiments can be designed without creativity, which should belong to the protection scope of the utility model.

Claims

1. A film bundling machine, characterized by The utility model relates to a kind of box bundling machines, including feeding conveyor belt (1), turnover clamping mechanism (2), box stack pushing mechanism (3), bundling mechanism (4) and film supply mechanism (5);The box bundling machine includes feeding conveyor belt (1), turnover clamping mechanism (2) and box stack pushing mechanism (3) are equipped above the feeding conveyor belt (1);Film supply mechanism (5) is equipped with two, respectively above and below the feeding conveyor belt (1), the bundling mechanism (4) is located at one end of the feeding conveyor belt (1), and the film supplied by two film supply mechanisms (5) is connected at the bundling mechanism (4);Box stack pushing mechanism (3) pushes the box stack formed by several boxes to pass through the bundling mechanism (4), and the bundling mechanism (4) is equipped with lifting limiting plate (41), bundling cutting mechanism (42), blowing mechanism (43) and lifting film pressing mechanism (44), the bundling cutting mechanism (42) includes fixed plate (421) and heating strip, the heating strip is equipped above the fixed plate (421), the lifting film pressing mechanism (44) includes driving push rod (441) and pressing plate (442), the driving push rod (441) drives the pressing plate (442) to press the film above the box stack and the film below to the fixed plate (421), the heating strip is used to heat the film to make the upper and lower film end contact position heat sealing and cutting, the lifting limiting plate (41) is used to press the box stack to prevent from being lifted, and the blowing mechanism (43) is equipped above both sides of the fixed plate (421) and is used to blow the film, to avoid that film is adhered to the fixed plate (421) after being heated.

2. A film wrapping machine according to claim 1, characterized in that The film supply mechanism (5) includes unwinder (51), film receiving mechanism (53), film driving mechanism (54), unwinding buffer mechanism (55) and film clamping mechanism (56), and the unwinder (51), film receiving mechanism (53), film driving mechanism (54), unwinding buffer mechanism (55) and film clamping mechanism (56) are all installed on the mounting panel (57), and the mounting panel (57) is located at one side of the feeding conveyor belt (1); The film receiving mechanism (53) includes movable clamping rod (531), fixed rod (532), film receiving fixed plate (533), film receiving cutting mechanism (534) and film receiving swing rod (535), the film receiving fixed plate (533) is fixedly installed on the mounting panel (57), both ends of the film receiving fixed plate (533) are provided with the film receiving cutting mechanism (534), the film receiving fixed plate (533) is provided with the movable clamping rod (531) and the fixed rod (532) below, and the film receiving fixed plate (533) is provided with the film receiving swing rod (535) above; Two said unwinders (51) are fixedly installed with film rolls, and no relative rotation occurs between the film rolls and the unwinders (51), the unwinders (51) are installed on the installation panel (57) through unwinding shafts (511), the thin film is pulled out from the film roll to drive the unwinder (51) to rotate, and the unwinding shaft (511) is connected with a damping mechanism on the back of the installation panel (57); The thin film of one of the film rolls passes through the film receiving mechanism (53), then passes through the film driving mechanism (54), the film unwinding buffering mechanism (55) and the film clamping mechanism (56) in sequence, and finally reaches the bundling mechanism (4) to be connected with the thin film supplied by the other film supply mechanism (5); the thin film of the other film roll passes above the film receiving fixed plate (533), and then passes through between the movable clamping rod (531) and the fixed rod (532) downwardly, and the movable clamping rod (531) presses the thin film on the fixed rod (532); The film receiving and cutting mechanism (534) can press and heat the overlapped thin film and cut off the excess thin film; The film receiving swing rod (535) is used to push the thin film after film receiving to avoid interference.

3. A film wrapping machine according to claim 2, characterised in that, The film driving mechanism (54) comprises a driving roller (541) and a movable roller (543) installed on the installation panel (57), the driving roller (541) and the movable roller (543) are in close contact, the thin film passes between the driving roller (541) and the movable roller (543), the driving roller (541) and the movable roller (543) are rotatable, the rotating shaft of the driving roller (541) is connected with a driving motor (542) through a belt transmission on the other end of the installation panel (57), the driving motor (542) drives the driving roller (541) to rotate through the belt transmission, and the thin film on the film roll is pulled out.

4. A film wrapping machine according to claim 3, characterised in that The loose roll buffering mechanism (55) comprises a loose roll swing rod (551) and a first roller (552), a plurality of the first rollers (552) are installed on the installation panel (57), one end of the loose roll swing rod (551) is installed on the installation panel (57) through a rotating shaft, the loose roll swing rod (551) can swing up and down around the rotating shaft, a plurality of second rollers (5511) are arranged on the loose roll swing rod (551), the film passing through the loose roll buffering mechanism (55) is alternately wound around the first roller (552) and the second roller (5511), the rotating shaft of the loose roll swing rod (551) is connected with a swing detection rod (553) and a hook hole plate (554) on the back of the installation panel (57), the back of the installation panel (57) is provided with two fixed hook hole plates (555), the fixed hook hole plate (555) and the two hook hole plates (554) are connected through two first tension springs (556), so that the loose roll swing rod (551) is automatically reset to a fixed angle; the two ends of the first tension spring (556) are provided with hooks, a plurality of through holes are arranged on the hook hole plate (554) and the fixed hook hole plate (555), the hooks of the first tension spring (556) can be hooked on different through holes to adjust the elastic force of the first tension spring (556); the swing detection rod (553) is provided with an arc-shaped detection piece (5531) at the end, and the back of the installation panel (57) is provided with a detection sensor (557), and the detection sensor (557) is electrically connected with the driving motor (542).

5. A film wrapping machine according to claim 2, wherein The damping mechanism comprises a damping belt (512), a second tension spring (513) and a hanging rod (514), the side surface of the end of the loose roll shaft (511) is provided with a surrounding groove (5111), the middle part of the damping belt (512) is embedded in the groove (5111), the hanging rod (514) is fixedly arranged on the back of the installation panel (57), and the two ends of the damping belt (512) are connected with two hanging rods (514) through two second tension springs (513) respectively.

6. A film wrapping machine according to claim 5, characterised in that, One of the hanging rods (514) is provided with a tightness adjusting hole plate (5141), a plurality of through holes are arranged on the tightness adjusting hole plate (5141), and the hooks of the second tension spring (513) can be selectively hung on different through holes.

7. A film wrapping machine according to claim 4, wherein The loose roll shaft (511) of the loose roll device (51) is provided with a detection gear disc (515) on the back of the installation panel (57), the back of the installation panel (57) is provided with a gear disc detection sensor (516), the gear disc detection sensor (516) is aligned with the teeth at the edge of the detection gear disc (515), when the detection gear disc (515) rotates with the rotating shaft of the loose roll device (51), the teeth of the detection gear disc (515) repeatedly block the gear disc detection sensor (516), and the gear disc detection sensor (516) can detect whether the detection gear disc (515) rotates.

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