Film sealing device with film cutting function

Abstract

The invention provides a film sealing device with a film cutting function, and belongs to the technical field of packaging film sealing equipment.The film sealing device comprises a film cutting part, the film cutting part comprises an air cylinder, a first connecting block, a second connecting block and a cutter, the air cylinder is arranged on the side, opposite to an upper transmission belt, of a side plate, and the first connecting block is in driving connection with the air cylinder and arranged above the air cylinder; the side face of the second connecting block is connected with the side face of the first connecting block through a first connecting rod, the cutter is arranged on the lower surface of the second connecting block, the film cutting part is arranged on one side of the side plate and arranged above the supporting plate, a first through hole and a bearing are arranged on the supporting plate, and the cutter can perpendicularly penetrate through the first through hole. And a heating pipe is arranged in the second connecting block. The film sealing device with the film cutting function is simple in structure, the air cylinder drives the first connecting block to move up and down and drives the cutter to move up and down, so that a packaging film is cut off, the heating pipe can heat the cutter, the packaging film making contact with the cutter is subjected to heat shrinkage, and film sealing operation is automatically conducted.

Description

[0001] This application is a divisional application. The filing date of the original application is April 9, 2021, the application number is 202110380653.7, and the invention title is: A film sealing device with a film cutting function and its working method. Technical Field

[0002] The present invention belongs to the technical field of packaging film sealing equipment. Specifically, it relates to a film sealing device with a film cutting function and its working method. Background Art

[0003] Heat shrinkable film is used for the sales and transportation of various products. Its main functions are to stabilize, cover and protect products. It has high flexibility, is not easily damaged, has strong anti-bursting force, strong impact resistance, strong tear resistance, and strong tensile force, and can replace box packaging; moreover, it has good transparency, a light transmittance of 80%, can display products, can promote products invisibly, and at the same time reduces distribution errors in the logistics link; in addition, it is moisture-proof, waterproof, and dust-proof, which can not only achieve the packaging effect, but also beautify products and protect products. It is non-toxic, odorless, and pollution-free, belonging to environmentally friendly packaging materials. The application scope of heat shrinkable film: medicines, beverages, mineral waters, beers, composite floors, palletizing, building materials, metal products, dairy products, glass bottles, industrial papers, and other large-scale equipment and items that need to be packaged.

[0004] When heat shrinkable film is used for film packaging of items, many use a one-side sealing mode, that is, the cut of the packaging film is on one side of the packaged item, which is not only beautiful but also convenient to operate. The existing heat shrinkable film packaging machines mostly adopt two-step operations when sealing the side of an item, that is, first cut the film of the item covered with the packaging film, and then use an oven to heat the heat shrinkable film to make it shrink, so as to complete the packaging operation. This kind of operation not only has a long production line, but also requires a lot of equipment, and the equipment cost needs to be increased. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the present invention provides a film sealing device with a film cutting function and its working method. This film sealing device with a film cutting function has a simple structure, can directly perform side sealing on the packaging film, can simplify the production line and operation steps, and save equipment costs; the working method of this film sealing device with a film cutting function is simple, has a good effect on side sealing of items, and is suitable for large-scale industrial promotion.

[0006] To achieve the above purpose, the present invention is realized through the following technical solutions: A film sealing device with a film cutting function includes a bottom plate, side plates, a film pressing part and a film cutting part. The side plates are vertically arranged on one side of the bottom plate. A support plate is arranged on one side of the side plates. The film pressing part is arranged on one side of the side plates, and the film cutting part is arranged on one side of the side plates and above the support plate. After the packaging film passes through the film pressing part, the film cutting part performs cutting and sealing operations.

[0007] Further, the film pressing part includes an upper driving wheel, a lower driving wheel, an upper driven wheel, a lower driven wheel and a motor. The motor is arranged on the lower surface of the bottom plate through a fixing seat. The lower driving wheel is in transmission connection with the output end of the motor through a transmission chain. The upper driving wheel is arranged above the lower driving wheel and is in gear meshing connection with the lower driving wheel. The lower driven wheel is arranged on one side of the side plate and is flush with the lower driving wheel. The upper driven wheel is arranged on one side of the side plate and is flush with the upper driving wheel. The upper driving wheel and the upper driven wheel are in transmission connection through an upper transmission belt. The lower driving wheel and the lower driven wheel are in transmission connection through a lower transmission belt.

[0008] Further, auxiliary wheels which are flush with each other are arranged above the upper driving wheel and the upper driven wheel. The auxiliary wheels, the upper driving wheel and the upper driven wheel are in transmission connection through an upper transmission belt.

[0009] Further, the film cutting part includes a cylinder, a first connecting block, a second connecting block and a cutter. The cylinder is arranged on the side opposite to the upper transmission belt of the side plate. The first connecting block is in driving connection with the cylinder and is arranged above the cylinder. The side surface of the second connecting block is connected to the side surface of the first connecting block through a first connecting rod. The cutter is arranged on the lower surface of the second connecting block. A first through hole and a bearing are arranged on the support plate. The cutter can vertically pass through the first through hole. A heating tube is arranged in the second connecting block. The cylinder drives the first connecting block to move up and down, driving the cutter to move up and down, so as to cut the packaging film. The heating tube can heat the cutter, causing the packaging film contacted by the cutter to thermally contract and automatically perform the film sealing operation.

[0010] Further, a pair of buffer blocks are also arranged on the side surface of the side plate. The film cutting part further includes a cover plate and a pressing plate. The corners of the cover plate and the pressing plate are connected through a second connecting rod. The pair of buffer blocks are respectively arranged near both ends between the cover plate and the pressing plate. The second connecting rod passes through the buffer blocks. A first spring is arranged on the section of the second connecting rod on the lower surface of the buffer block. The top end of the first spring is connected to the lower surface of the buffer block, and the bottom end passes through the pressing plate. A second through hole is arranged on the pressing plate. The cutter can vertically pass through the second through hole. When the cutter moves downwards, the connecting block can press the pressing plate to move it downwards. The pressing plate can press the packaging film on the support plate, facilitating the cutter to cut the packaging film. The first spring can enhance the pressing effect of the pressing plate on the packaging film.

[0011] Further, a pressing portion is provided on the side plate close to the upper driven wheel side. The pressing portion includes an upper pressing roller, a lower pressing roller, an upper connecting rod, a lower connecting rod and a fixing rod. The pressing portion is connected to the side surface of the side plate through a first fixing frame. The upper pressing roller is connected to the first fixing frame through the upper connecting rod. The lower pressing roller is connected to the first fixing frame through the lower connecting rod. The upper pressing roller is arranged directly above the lower pressing roller. The fixing rod sequentially passes through the upper connecting rod and the lower connecting rod vertically. A second spring is sleeved outside the upper end of the fixing rod where the fixing rod is located. Through the pressing action between the upper pressing roller and the lower pressing roller, the packaging film can facilitate the cutting of the packaging film by the cutting knife, making the packaging of the item by the packaging film better. The distance between the upper pressing roller and the lower pressing roller can be adjusted through the upper connecting rod and the lower connecting rod. The fixing rod can further enhance the pressing action between the upper pressing roller and the lower pressing roller. The second spring can make the fixing rod have an elastic acting force on the upper connecting rod to ensure the fixing effect between the upper connecting rod and the lower connecting rod. A nut for fixing the second spring is provided at the top of the fixing rod.

[0012] Further, a waste material collecting roller is provided on the side surface of the side plate close to the lower driving wheel. The waste material collecting roller is connected to the side surface of the side plate through a second fixing frame. The waste part of the packaging film can be wound and collected. The waste material collecting roller can be driven to rotate automatically by an external machine or can be rotated manually for material collection.

[0013] Further, a lifting portion is further provided on the lower surface of the bottom plate. The lifting portion includes a connecting plate, a lead screw and a group of guide rods. The connecting plate is arranged directly below the bottom plate. The top end of the lead screw is connected to the bottom plate through a nut block, and the bottom end passes through the connecting plate and is connected to the connecting plate through a first connecting seat. The top end of the guide rod is connected to the bottom plate, and the bottom end is connected to the connecting plate through a second connecting seat. The guide rod can move freely along the second connecting seat. By rotating the lead screw, the bottom plate can move up and down along the lead screw, thereby driving the overall lifting of the film sealing mechanism and facilitating the adjustment of the film sealing operation for the item.

[0014] Further, a hand wheel is provided at the bottom end of the lead screw. It is convenient to rotate the lead screw.

[0015] The present invention also provides a working method of a film sealing device with a film cutting function. Using a film sealing device with a film cutting function as described above, it includes the following steps: (1) The packaging film is pressed between the upper pressing roller and the lower pressing roller, and then passes between the upper transmission belt and the lower transmission belt. The side film of the item to be packaged is on the support plate, and the waste part is wound outside the waste material collecting roller; After the item is packaged, start the cylinder. The cylinder drives the cutting knife to move downward, and the second connecting block drives the pressing plate to move downward to press the film. The cutting knife cuts the film on the support plate. At the same time, since a heating tube is provided in the second connecting block, the heating tube can heat the cutting knife, causing the film contacted by the cutting knife to thermally contract, and automatically sealing the side film of the packaged item.

[0016] (3) Start the motor. The motor drives the lower driving wheel to rotate through the transmission chain. The lower driving wheel drives the upper driving wheel to rotate through gear meshing. The lower driving wheel drives the lower driven wheel to rotate through the lower transmission belt, and the upper driving wheel drives the upper driven wheel to rotate through the upper transmission belt, thereby driving the passing packaging film to move.

[0017] Beneficial effects: Compared with the prior art, the present invention has the following advantages: A film sealing device with a film cutting function and its working method provided by the present invention have a simple structure, can directly perform side film sealing on the packaging film, can simplify the production line and operation steps, and save equipment costs; through the pressing action between the upper pressing roller and the lower pressing roller, it is convenient for the cutting knife to cut the packaging film, making the packaging of the item by the packaging film better; by rotating the screw rod, the bottom plate can move up and down along the screw rod, thereby driving the overall lifting of the film sealing mechanism, facilitating the adjustment of the film sealing operation for the item; the working method of the film sealing device with a film cutting function is simple, has a good side film sealing effect on the item, and is highly efficient, and is suitable for large-scale industrial promotion. Description of the Drawings

[0018] Figure 1 It is a structural diagram of a film sealing device with a film cutting function according to the present invention; Figure 2 It is another perspective structural diagram of a film sealing device with a film cutting function according to the present invention; Figure 3 It is a front view of the structure of a film sealing device with a film cutting function according to the present invention; Figure 4 It is Figure 1 The enlarged view of the partial structure in

[0019] In the figure: 1 bottom plate, 2 side plates, 21 support plates, 211 first through holes, 212 bearings, 3 film pressing parts, 31 upper driving wheels, 32 lower driving wheels, 33 upper driven wheels, 34 lower driven wheels, 35 upper transmission belts, 36 lower transmission belts, 37 motors, 371 fixing seats, 38 transmission chains, 39 auxiliary wheels, 4 film cutting parts, 41 cylinders, 42 first connection blocks, 43 first connecting rods, 44 second connection blocks, 441 heating tubes, 45 cutting knives, 46 buffer blocks, 47 covers, 48 pressing plates, 481 second through holes, 49 second connecting rods, 491 first springs, 5 pressing parts, 51 upper pressing rollers, 52 lower pressing rollers, 53 first fixing frames, 54 upper connecting rods, 55 lower connecting rods, 56 fixing rods, 561 second springs, 6 lifting parts, 61 connecting plates, 62 lead screws, 621 hand wheels, 622 first connection seats, 63 guide rods, 631 second connection seats, 7 waste material collecting rollers, 71 second fixing frames. Detailed implementation manners

[0020] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, but should not be construed as a limitation to the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing 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 thus should not be construed as a limitation to the present invention.

[0022] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

[0023] In the present invention, unless otherwise clearly specified or limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present invention, unless otherwise clearly specified or limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0025] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0026] Embodiment 1 As Figures 1-4 shown, a film sealing device with a film cutting function includes a bottom plate 1, side plates 2, a film pressing part 3 and a film cutting part 4. The side plates 2 are vertically arranged on one side of the bottom plate 1. A support plate 21 is arranged on one side of the side plates 2. The film pressing part 3 is arranged on one side of the side plates 2. The film cutting part 4 is arranged on one side of the side plates 2 and above the support plate 21.

[0027] Among them, the film pressing part 3 includes an upper driving wheel 31, a lower driving wheel 32, an upper driven wheel 33, a lower driven wheel 34 and a motor 37. The motor 37 is arranged on the lower surface of the bottom plate 1 through a fixing seat 371. The lower driving wheel 32 is in transmission connection with the output end of the motor 37 through a transmission chain 38. The upper driving wheel 31 is arranged above the lower driving wheel 32 and is in gear meshing connection with the lower driving wheel 32. The lower driven wheel 34 is arranged on one side of the side plates 2 and is flush with the lower driving wheel 32. The upper driven wheel 33 is arranged on one side of the side plates 2 and is flush with the upper driving wheel 31. The upper driving wheel 31 and the upper driven wheel 33 are in transmission connection through an upper transmission belt 35. The lower driving wheel 32 and the lower driven wheel 34 are in transmission connection through a lower transmission belt 36.

[0028] In addition, the film cutting part 4 includes a cylinder 41, a first connecting block 42, a second connecting block 44 and a cutter 45. The cylinder 41 is arranged on the side opposite to the upper transmission belt 35 of the side plate 2. The first connecting block 42 is drivingly connected to the cylinder 41 and arranged above the cylinder 41. The side surface of the second connecting block 44 is connected to the side surface of the first connecting block 42 through a first connecting rod 43. The cutter 45 is arranged on the lower surface of the second connecting block 44. A first through hole 211 and a bearing 212 are arranged on the support plate 21. The cutter 45 can vertically pass through the first through hole 211. A heating tube 441 is arranged in the second connecting block 44.

[0029] The working method of the film sealing device with a film cutting function includes the following steps: (1) The packaging film passes between the upper transmission belt 35 and the lower transmission belt 36, and the side film of the item to be packaged is on the support plate 21. (2) After the item is packaged, the cylinder 41 is started. The cylinder 41 drives the cutter 45 to move downward. The cutter 45 cuts the film on the support plate 21. At the same time, since a heating tube 441 is arranged in the second connecting block 44, the heating tube 441 can heat the cutter 45, causing the film contacted by the cutter 45 to thermally contract, and automatically sealing the side film of the packaged item. (3) The motor 37 is started. The motor 37 drives the lower driving wheel 32 to rotate through the transmission chain 38. The lower driving wheel 32 drives the upper driving wheel 31 to rotate through gear meshing. The lower driving wheel 32 drives the lower driven wheel 34 to rotate through the lower transmission belt 36. The upper driving wheel 31 drives the upper driven wheel 33 to rotate through the upper transmission belt 35, thereby driving the passing packaging film to move.

[0030] Embodiment 2 As Figures 1-4 shown, a film sealing device with a film cutting function includes a bottom plate 1, side plates 2, a film pressing part 3 and a film cutting part 4. The side plates 2 are vertically arranged on one side of the bottom plate 1. A support plate 21 is arranged on one side of the side plates 2. The film pressing part 3 is arranged on one side of the side plates 2. The film cutting part 4 is arranged on one side of the side plates 2 and above the support plate 21.

[0031] The film pressing part 3 includes an upper driving wheel 31, a lower driving wheel 32, an upper driven wheel 33, a lower driven wheel 34 and a motor 37. The motor 37 is arranged on the lower surface of the bottom plate 1 through a fixed seat 371. The lower driving wheel 32 is connected to the output end of the motor 37 through a transmission chain 38. The upper driving wheel 31 is arranged above the lower driving wheel 32 and is connected to the lower driving wheel 32 by gear meshing. The lower driven wheel 34 is arranged on one side of the side plate 2 and is flush with the lower driving wheel 32. The upper driven wheel 33 is arranged on one side of the side plate 2 and is flush with the upper driving wheel 31. The upper driving wheel 31 is connected to the upper driven wheel 33 through an upper transmission belt 35. The lower driving wheel 32 is connected to the lower driven wheel 34 through a lower transmission belt 36. Auxiliary wheels 39 that are flush with each other are arranged above the upper driving wheel 31 and the upper driven wheel 33. The auxiliary wheels 39, the upper driving wheel 31 and the upper driven wheel 33 are connected to each other through an upper transmission belt 35.

[0032] In addition, the film cutting part 4 includes a cylinder 41, a first connecting block 42, a second connecting block 44 and a cutter 45. The cylinder 41 is arranged on the side of the side plate 2 opposite to the upper transmission belt 35. The first connecting block 42 is driven and connected to the cylinder 41 and is arranged above the cylinder 41. The side of the second connecting block 44 is connected to the side of the first connecting block 42 through the first connecting rod 43. The cutter 45 is arranged on the lower surface of the second connecting block 44. The support plate 21 is provided with a first through hole 211 and a bearing 212. The cutter 45 can vertically pass through the first through hole 211. A heating tube 441 is provided in the second connecting block 44. A pair of buffer blocks 46 are also provided on the side of the side plate 2, and the film cutting part 4 also includes a cover plate 47 and a pressure plate 48. The corners of the cover plate 47 and the pressure plate 48 are connected by a second connecting rod 49. A pair of buffer blocks 46 are respectively arranged between the cover plate 47 and the pressure plate 48 near both ends. The second connecting rod 49 is penetrated through the buffer block 46. The second connecting rod 49 is provided on the lower surface section of the buffer block 46 and a first spring 491 is provided. The top end of the first spring 491 is connected to the lower surface of the buffer block 46, and the bottom end is penetrated through the pressure plate 48. The pressure plate 48 is provided with a second through hole 481, and the cutter 45 can vertically pass through the second through hole 481.

[0033] In addition, a pressing part 5 is provided on the side plate 2 close to the upper driven wheel 33 side. The pressing part 5 includes an upper pressing roller 51, a lower pressing roller 52, an upper connecting rod 54, a lower connecting rod 55 and a fixing rod 56. The pressing part 5 is connected to the side surface of the side plate 2 through a first fixing frame 53. The upper pressing roller 51 is connected to the first fixing frame 53 through the upper connecting rod 54. The lower pressing roller 52 is connected to the first fixing frame 53 through the lower connecting rod 55. The upper pressing roller 51 is arranged directly above the lower pressing roller 52. The fixing rod 56 vertically penetrates through the upper connecting rod 54 and the lower connecting rod 55 in sequence. A second spring 561 is sleeved outside the upper end of the upper connecting rod 54 where the fixing rod 56 is located. A waste material collecting roller 7 is provided on the side surface of the side plate 2 close to the lower driving wheel 32. The waste material collecting roller 7 is connected to the side surface of the side plate 2 through a second fixing frame 71.

[0034] Furthermore, a lifting part 6 is further provided on the lower surface of the bottom plate 1. The lifting part 6 includes a connecting plate 61, a lead screw 62 and a group of guide rods 63. The connecting plate 61 is arranged directly below the bottom plate 1. The top end of the lead screw 62 is connected to the bottom plate 1 through a nut block, and the bottom end penetrates through the connecting plate 61 and is connected to the connecting plate 61 through a first connecting seat 622. The top end of the guide rod 63 is connected to the bottom plate 1, and the bottom end is connected to the connecting plate 61 through a second connecting seat 631. The guide rod 63 can move freely along the second connecting seat 631. A hand wheel 621 is provided at the bottom end of the lead screw 62.

[0035] The working method of this kind of film sealing device with a film cutting function includes the following steps: (1) The packaging film is pressed between the upper pressing roller 51 and the lower pressing roller 52, and then passes between the upper transmission belt 35 and the lower transmission belt 36. The side film of the item to be packaged is on the support plate 21, and the waste part is wound around the outside of the waste material collecting roller 7; (2) After the item is packaged, the air cylinder 41 is started. The air cylinder 41 drives the cutter 45 to move downwards. The second connecting block 44 drives the pressing plate 48 to move downwards to press the film. The cutter 45 cuts the film on the support plate 21. At the same time, since a heating tube 441 is provided in the second connecting block 44, the heating tube 441 can heat the cutter 45, so that the film contacted by the cutter 45 undergoes heat shrinkage, and the side film of the packaged item is automatically sealed.

[0036] (3) The motor 37 is started. The motor 37 drives the lower driving wheel 32 to rotate through the transmission chain 38. The lower driving wheel 32 drives the upper driving wheel 31 to rotate through gear meshing. The lower driving wheel 32 drives the lower driven wheel 34 to rotate through the lower transmission belt 36. The upper driving wheel 31 drives the upper driven wheel 33 to rotate through the upper transmission belt 35, thereby driving the passing packaging film to move. The waste material is collected by the waste material collecting roller 7, and the next product packaging and film sealing operation is carried out.

[0037] The above are only several embodiments of the present invention. It should be noted that for those of ordinary skill in the art, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A film-sealing device with a film-cutting function, characterized in that: Including: A film cutting part (4), the film cutting part (4) includes a cylinder (41), a first connecting block (42), a second connecting block (44) and a cutter (45). The cylinder (41) is arranged on the side of the side plate (2) opposite to the upper transmission belt (35). The first connecting block (42) is drivingly connected to the cylinder (41) and arranged above the cylinder (41). The side surface of the second connecting block (44) is connected to the side surface of the first connecting block (42) through a first connecting rod (43). The cutter (45) is arranged on the lower surface of the second connecting block (44). The film cutting part (4) is arranged on one side of the side plate (2) and above the support plate (21). The support plate (21) is provided with a first through hole (211) and a bearing (212). The cutter (45) can vertically pass through the first through hole (211). A heating tube (441) is arranged in the second connecting block (44).

2. The film-sealing device with a film-cutting function according to claim 1, characterized in that: The film cutting part (4) further includes a cover plate (47) and a pressing plate (48). A pair of buffer blocks (46) are also arranged on the side surface of the side plate (2). The corners of the cover plate (47) and the pressing plate (48) are connected through a second connecting rod (49). The pair of buffer blocks (46) are respectively arranged near both ends between the cover plate (47) and the pressing plate (48). The second connecting rod (49) passes through the buffer blocks (46). A first spring (491) is arranged on the section of the second connecting rod (49) on the lower surface of the buffer block (46). The top end of the first spring (491) is connected to the lower surface of the buffer block (46), and the bottom end passes through the pressing plate (48). A second through hole (481) is arranged on the pressing plate (48). The cutter (45) can vertically pass through the second through hole (481).

3. The film-sealing device with a film-cutting function according to claim 1, characterized in that: It further includes a film pressing part (3). The film pressing part (3) includes an upper driving wheel (31), a lower driving wheel (32), an upper driven wheel (33), a lower driven wheel (34) and a motor (37). The motor (37) is arranged on the lower surface of the bottom plate (1) through a fixing seat (371). The lower driving wheel (32) is drivingly connected to the output end of the motor (37) through a transmission chain (38). The upper driving wheel (31) is arranged above the lower driving wheel (32) and is meshed with the lower driving wheel (32) through gears. The lower driven wheel (34) is arranged on one side of the side plate (2) and is flush with the lower driving wheel (32). The upper driven wheel (33) is arranged on one side of the side plate (2) and is flush with the upper driving wheel (31). The upper driving wheel (31) and the upper driven wheel (33) are drivingly connected through an upper transmission belt (35). The lower driving wheel (32) and the lower driven wheel (34) are drivingly connected through a lower transmission belt (36).

4. The film-sealing device with a film-cutting function according to claim 3, characterized in that: Auxiliary wheels (39) which are flush with each other are arranged above the upper driving wheel (31) and the upper driven wheel (33). The auxiliary wheels (39), the upper driving wheel (31) and the upper driven wheel (33) are drivingly connected through the upper transmission belt (35).

5. The film-sealing device with a film-cutting function according to claim 1, characterized in that: Further included is a pressing part (5), and the pressing part (5) includes an upper pressing roller (51), a lower pressing roller (52), an upper connecting rod (54), a lower connecting rod (55) and a fixing rod (56). The pressing part (5) is connected to the side surface of the side plate (2) through a first fixing frame (53). The upper pressing roller (51) is connected to the first fixing frame (53) through the upper connecting rod (54). The lower pressing roller (52) is connected to the first fixing frame (53) through the lower connecting rod (55). The upper pressing roller (51) is arranged directly above the lower pressing roller (52). The fixing rod (56) sequentially passes through the upper connecting rod (54) and the lower connecting rod (55) vertically. A second spring (561) is sleeved outside the upper end of the fixing rod (56) where it passes through the upper connecting rod (54).

6. The film-sealing device with a film-cutting function according to claim 1, characterized in that: Further included is a lifting part (6), and the lifting part (6) includes a connecting plate (61), a lead screw (62) and a set of guide rods (63). The connecting plate (61) is arranged directly below the bottom plate (1). The top end of the lead screw (62) is connected to the bottom plate (1) through a nut block, and the bottom end passes through the connecting plate (61) and is connected to the connecting plate (61) through a first connecting seat (622). The top end of the guide rod (63) is connected to the bottom plate (1), and the bottom end is connected to the connecting plate (61) through a second connecting seat (631). The guide rod (63) can move freely along the second connecting seat (631).

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