Film tearing device

Abstract

The utility model relates to the technical field of packaging machinery, in particular to a film tearing device, which comprises a bottom plate, a film tearing mechanism, a film tearing mechanism, a film tearing mechanism and a film tearing mechanism, and is characterized in that the bottom plate is fixed on a rack and is used for supporting penicillin bottle film bags; the cutter is arranged on the lower side of the film tearing station and is driven by a first lifting mechanism to lift up and down; the cutter is provided with two longitudinal cutters and two transverse cutters, each longitudinal cutter extends along a gap between bottle openings of two rows of penicillin bottles in the longitudinal direction of the penicillin bottle array, each transverse cutter extends along a gap between bottle openings of two rows of penicillin bottles in the transverse direction of the penicillin bottle array, and the longitudinal cutters and the transverse cutters are crossed to form a closed cutting area; the cutter groove is formed in the film tearing station and penetrates through the bottom plate, the position of the cutter groove vertically corresponds to the cutter, and the contour of the cutter groove is matched with that of the cutter; and the film tearing suction cup is arranged above the bottom plate and connected with the driving mechanism, and when the driving mechanism acts, the film tearing suction cup ascends and descends in the vertical direction and shakes and translates in the horizontal direction.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging machinery, and particularly relates to a film tearing device. Background Art

[0002] One of the existing packaging methods for vials is to use heat-shrinkable plastic film for packaging. A certain number of vials are arranged in an array, and the plastic film is used to completely wrap the vial array. By utilizing the property that the plastic film shrinks when heated, the vials are in close contact with each other, forming a film package with a regular shape.

[0003] Before pharmaceutical companies use vials for filling, the plastic film needs to be peeled off. Since there is a lack of film peeling equipment for the above-mentioned packaging method in the industry, the currently common peeling method is for workers to use tools such as blades to complete the relevant operations. This is likely to scratch the outer wall of the vials, with relatively low work efficiency. A large amount of repetitive work is likely to cause fatigue and increase labor costs. This problem urgently needs to be solved. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the above background art, and provide a film tearing device for the film package of vials with all-plastic film packaging, so as to complete automated film tearing operations, improve production efficiency, and reduce production costs.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A film tearing device, comprising:

[0007] A bottom plate, fixed on a frame, for supporting the vial film package, with one section serving as a film tearing station;

[0008] A cutter, arranged on the lower side of the film tearing station, and capable of moving up and down under the drive of a first lifting mechanism; the cutter is provided with two longitudinal knives and two transverse knives. Each longitudinal knife extends along the bottle mouth gaps of two rows of vials in the longitudinal direction of the vial array, and each transverse knife extends along the bottle mouth gaps of two rows of vials in the transverse direction of the vial array. The longitudinal knives and the transverse knives intersect to form a closed cutting area;

[0009] A knife groove, opened at the film tearing station and penetrating through the bottom plate, with the position of the knife groove corresponding to the cutter up and down, and the contour matching the contour of the cutter; a film tearing suction cup, arranged above the bottom plate and connected to a driving mechanism. When the driving mechanism operates, the film tearing suction cup moves up and down in the vertical direction, and jitters and translates in the horizontal direction.

[0010] In a further technical solution, through holes are opened in the bottom plate within the contour range of the knife groove, and a lower suction cup is arranged at the through holes. The lower suction cup is connected to a second lifting mechanism and can move up and down under the drive of the second lifting mechanism;

[0011] A nozzle connected to a gas source is provided below the bottom plate, and the nozzle is arranged towards the lower suction cup; alternatively, a suction nozzle connected to a vacuum source is provided below the bottom plate, and the suction nozzle is arranged towards the lower suction cup; alternatively, a manipulator extending from below the bottom plate to a certain range around the lower suction cup is provided on the frame.

[0012] In a further technical solution, a group of negative pressure holes connected to a vacuum source are opened on the bottom plate within the contour range of the knife groove, and a suction cup group driven by a manipulator or a second driving mechanism is provided on the frame. The suction cup group is located above the bottom plate. When the second driving mechanism operates, the suction cup group moves up and down in the vertical direction and translates in the horizontal direction.

[0013] In a further technical solution, parallel backing plates are provided on both sides of the film tearing station. The space between the backing plates is the passage for the vial film package. The backing plates are connected to the ejector rod of the clamping cylinder. Driven by the clamping cylinder, the backing plates on both sides move closer to or away from each other;

[0014] A chute is opened on the bottom plate in front of the film tearing station, and a lifting plate is installed in the chute. The lifting plate is connected to a third lifting mechanism. After the lifting plate descends, its top surface is flush with the top surface of the bottom plate;

[0015] A rear push plate is further provided at the film tearing station. The rear push plate is connected to a third driving mechanism. When the third driving mechanism operates, the rear push plate moves up and down in the vertical direction and translates in the front-rear direction.

[0016] In a further technical solution, the two longitudinal knives are located on both sides of the longitudinal direction of the vial array, and each longitudinal knife extends along the bottle mouth gaps of the outermost two rows of vials on that side.

[0017] In a further technical solution, the two transverse knives are located on both sides of the transverse direction of the vial array, and each transverse knife extends along the bottle mouth gaps of the outermost two rows of vials on that side.

[0018] In a further technical solution, two branches are provided at each of the four corners of the tool. There is a certain angle between the two branches and they can accommodate at least one bottle mouth of a vial.

[0019] In a further technical solution, the tops of the longitudinal knife and the transverse knife are serrated.

[0020] In a further technical solution, the longitudinal knife of the tool extends in a straight line, triangular wave, S-shaped wave or trapezoidal wave between the bottle mouth gaps.

[0021] In a further technical solution, the transverse knife of the tool extends in a triangular wave, S-shaped wave or trapezoidal wave between the bottle mouth gaps.

[0022] The beneficial effects of the present utility model are as follows: The tool of the present utility model utilizes the gap between the mouths of the row of vials to cut the plastic film at the bottom of the vial film package longitudinally and transversely, separating the bottom of the plastic film from the surrounding, without scratching the outer wall of the vial. Then, the bottom film and the upper plastic film are removed by the adsorption of the suction cup. The serrations at the top of the tool can quickly complete the cutting action, with high working efficiency, capable of automatically completing the film tearing action, effectively reducing labor costs, and meeting the automation supporting requirements of the filling line. Brief Description of the Drawings

[0023] Figure 1 It is a schematic side view structure diagram of an embodiment of the present utility model.

[0024] Figure 2 It is a schematic top view structure diagram of an embodiment of the present utility model.

[0025] Figure 3 It is a schematic diagram of one implementation manner of the lower suction cup in an embodiment of the present utility model.

[0026] Figure 4 It is a schematic diagram of the cutting path of the tool on the vial film package in an embodiment of the present utility model.

[0027] Figure 5 It is a schematic diagram of the gap between the mouths of the vials in an embodiment of the present utility model.

[0028] Figure 6 It is a schematic structure diagram of one implementation manner of the tool in an embodiment of the present utility model.

[0029] Figure 7 It is a schematic structure diagram of a second implementation manner of the tool in an embodiment of the present utility model.

[0030] Figure 8 It is a schematic diagram of one of the serration structures of the tool in an embodiment of the present utility model.

[0031] Figure 9 It is a schematic diagram of a second serration structure of the tool in an embodiment of the present utility model.

[0032] Figure 10 It is a schematic diagram of one implementation manner of the negative pressure hole in an embodiment of the present utility model.

[0033] In the figure: frame 1, bottom plate 2, clamping cylinder 3, backing plate 4, vial film package 5, vial array 5.1, plastic film 5.2, film tearing suction cup 6, tool 7, longitudinal knife 7.1, transverse knife 7.2, branch 7.3, serrations 7.4, lifting cylinder 8, nozzle 9, lower suction cup 10, through hole 11, tool groove 12, film tearing station 13, cutting path 14, lifting plate 15, rear push plate 16, negative pressure hole 17, suction cup group 18. Detailed Implementation Manner

[0034] To enable those of ordinary skill in the art to more clearly understand the purpose, technical solution and advantages of the present utility model, the following further elaborates on the present utility model in conjunction with the accompanying drawings and embodiments. However, the present utility model is not limited to the following embodiments.

[0035] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0036] As Figure 1 、 Figure 2 shown, this embodiment provides a film tearing device, which is mainly used for the film tearing operation of the vial film package. Obviously, it can also be used for the film tearing operation of bottles with a similar structure. The film tearing device includes a frame 1, a bottom plate 2, a cutter 7, a cutter groove 12, and a film tearing suction cup 6. Among them, the bottom plate 2 is horizontally fixed on the frame 1, and its main function is to support the vial film package 5 conveyed by the front-end equipment. The mouth of the vial film package 5 is arranged downward, and one section of the bottom plate 2 serves as the film tearing station 13.

[0037] The cutter 7 is arranged below the film tearing station 13. The cutter 7 is installed on the first lifting mechanism and can move up and down relative to the vial film package 5 under the drive of the first lifting mechanism. In this embodiment, the first lifting mechanism uses a lifting cylinder 8. Of course, other existing mechanisms that can achieve lifting actions can also be used. Obviously, in order to realize the lifting of the cutter 7, a cutter groove 12 that penetrates the upper and lower parts of the bottom plate 2 needs to be opened on the bottom plate 2 of the film tearing station 13, and the position of the cutter groove 12 needs to correspond to the cutter 7 up and down, and the contour matches the cutter 7. The width of the cutter groove 12 should be greater than the thickness of the cutter 7.

[0038] As Figure 4 、 Figure 6 、 Figure 7 described, the cutter 7 is provided with two longitudinal cutters 7.1 and two transverse cutters 7.2, and the two longitudinal cutters 7.1 and the two transverse cutters 7.2 intersect to form a closed cutting area. The two longitudinal cutters 7.1 are arranged substantially parallel to each other and maintain a certain distance, and the same is true for the arrangement of the two transverse cutters 7.2. As Figure 5As shown, the diameter of the mouth of the vial is smaller than the diameter of its body, so there is a gap between the mouths. Each longitudinal knife 7.1 extends along the mouth gaps of two rows of vials in the longitudinal direction of the vial array 5.1. These two rows of vials can be any two rows in the longitudinal direction. In this embodiment, it is recommended to arrange the two longitudinal knives 7.1 on both sides of the vial array 5.1 in the longitudinal direction, and each longitudinal knife 7.1 extends along the mouth gaps of the outermost two rows of vials on this side. Each transverse knife 7.2 extends along the mouth gaps of two rows of vials in the transverse direction of the vial array 5.1. Similarly, these two rows of vials can be any two rows in the transverse direction. In this embodiment, the two transverse knives 7.2 are located on both sides of the vial array 5.1 in the transverse direction, and each transverse knife 7.2 extends along the mouth gaps of the outermost two rows of vials on this side. As Figure 4 shown, such a tool 7 arrangement can increase the area of the bottom film cut by the cutting path 14 to a greater extent.

[0039] In order to break the wrapping of the plastic film 5.2 at the four corners of the bottom of the vial film package 5 and facilitate the subsequent removal of the upper plastic film (for the convenience of description, the upper plastic film will be simply referred to as the upper film hereinafter), two branches 7.3 are provided at each of the four corners of the tool 7, and there is a certain angle between the two branches 7.3. As Figure 4 shown, these two branches 7.3 can accommodate the mouth of one vial at the corresponding corner of the bottom of the vial film package 5.

[0040] In this embodiment, in order to increase the penetrability of the tool 7, the tops of the longitudinal knife 7.1 and the transverse knife 7.2 are serrated. There are at least two ways to set the serrations 7.4. One is the large serrations as Figure 8 shown, and the other is the small serrations as Figure 9 shown. Obviously, it is also possible to use a combination of large serrations and small serrations.

[0041] In this embodiment, as Figure 4 shown, the vials in the longitudinal direction of the vial array 5.1 are in close contact. There are various ways for the longitudinal knife 7.1 of the tool 7 to extend between the mouth gaps, such as linear extension, or triangular wave extension as Figure 4 、 Figure 6 shown, S-shaped wave extension as Figure 7 shown, or trapezoidal wave extension can also be used. Since the vials in the transverse direction of the vial array 5.1 need to be arranged in a staggered manner, the spacing is relatively larger and curved compared with the longitudinal direction. There are also various ways for the transverse knife 7.2 of the tool 7 to extend between the mouth gaps, such as trapezoidal wave extension as Figure 4 、 Figure 6 shown, or S-shaped wave extension as Figure 7 shown, or triangular wave extension can also be used. It is specifically determined according to the size of the mouth gap of the vial.

[0042] In this embodiment, in order to ensure the stability of the vial array 5.1 during the processes of film tearing and plastic film 5.2 cutting, parallel retaining plates 4 are provided on both longitudinal sides of the film tearing station 13. The space between the retaining plates 4 forms a channel for the longitudinal movement of the vial film package 5. The retaining plates 4 are connected to the ejector rods of the clamping cylinders 3. When the vial film package 5 is in place, under the drive of the clamping cylinders 3, the retaining plates 4 on both sides move closer to each other to clamp the vial film package 5. In addition, a chute is formed on the bottom plate in front of the film tearing station 13, and a lifting plate 15 is installed in the chute. The lifting plate 15 is connected to a third lifting mechanism. After the lifting plate 15 descends, its top surface is flush with the top surface of the bottom plate. The film tearing station 13 is also provided with a rear push plate 16, which is connected to a third driving mechanism. When the third driving mechanism operates, the rear push plate 16 moves up and down in the vertical direction and translates in the front-rear direction. When it is necessary to change the type of the vial film package 5 or other situations, the distance between the retaining plates 4 can be adjusted to be closer or farther apart. During the film tearing process, the retaining plates clamp the vial film package 5 from both sides, the lifting plate 15 rises, and the rear push plate 16 pushes the vial film package 5 forward to make it abut against the lifting plate 15, clamping the vial film package 5 in the front-rear direction.

[0043] This embodiment is also provided with a film tearing suction cup 6 for removing the upper film. The film tearing suction cup 6 is arranged above the bottom plate 2, installed on a first driving mechanism that can achieve lifting and translation and is connected to a vacuum source. When the first driving mechanism operates, the film tearing suction cup 6 can move up and down in the vertical direction and translate in the horizontal direction. In addition, in order to loosen the upper film during the film tearing process, the first driving mechanism can be used to control the film tearing suction cup 6 to first perform reciprocating sliding in the horizontal direction at a certain frequency and amplitude to achieve jitter. After jittering for a certain period of time, the film tearing suction cup 6 is then lifted and translated. After translation in place, the upper film is released.

[0044] In this embodiment, a through hole 11 is formed in the bottom plate 2 within the contour range of the knife groove 12. A lower suction cup 10 for adsorbing the bottom film after cutting is provided at the through hole 11. The lower suction cup 10 is installed on a second lifting mechanism and is connected to a vacuum source, and realizes up and down lifting under the drive of the second lifting mechanism. The second lifting mechanism is arranged on the frame 1 below the floor and can adopt a cylinder. Of course, other existing mechanisms that can achieve lifting actions can also be used. In this embodiment, it is recommended that the aperture of the through hole 11 be smaller than the body diameter of the vial to reduce the risk of vial jamming. The through hole 11 can be a Figure 2 circular hole as shown, or a Figure 3 strip-shaped hole as shown. The shape of the suction cup is similar to the shape of the through hole 11.

[0045] In order to remove the bottom film sucked by the lower suction cup, in this embodiment, a nozzle 9 connected to a gas source is provided below the bottom plate 2, and the nozzle 9 is arranged towards the lower suction cup 10. After the lower suction cup 10 drags the bottom film from the through hole 11 of the bottom plate 2 and cuts off the vacuum, the high-speed air flow ejected by the nozzle 9 can blow away the bottom film that is not adsorbed. As another implementation manner to replace the nozzle 9, a suction nozzle connected to a vacuum source is provided below the bottom plate 2, and the suction nozzle is arranged towards the lower suction cup 10. The suction nozzle can suck the bottom film over. For this purpose, a container for holding the bottom film can be provided below the suction nozzle. When the suction nozzle disconnects the vacuum, the bottom film falls into the container. Obviously, the structures of the above nozzle 9 and suction nozzle can also be realized by other existing devices, such as a multi-degree-of-freedom manipulator that extends below the bottom plate 2 and takes away the bottom film after reaching near the lower suction cup 10.

[0046] When the vial film package 5 reaches the film tearing station 13, the cutter 7 rises upward. After passing through the cutter groove 12, the top of the cutter 7 penetrates the plastic film 5.2 by using the bottle mouth gap, cuts out a bottom film, separates the bottom film from the upper film, and then adsorbs the upper film by using the film tearing suction cup 6, and the lower suction cup 10 adsorbs the bottom film. As the film tearing suction cup 6 rises and the lower suction cup 10 descends, the upper film and the bottom film are all removed.

[0047] As Figure 10 shown, another implementation manner for taking away the bottom film is that a group of negative pressure holes 17 connected to a vacuum source are opened on the bottom plate 2 within the contour range of the cutter groove 12. The negative pressure holes 17 try to cover the bottom plate 2 within the adsorption contour range. A suction cup group 18 driven by a manipulator or a second driving mechanism is provided on the frame. The suction cup group 18 is located above the bottom plate 2. When the second driving mechanism operates, the suction cup group 18 moves up and down in the vertical direction and translates in the horizontal direction. During the film tearing process, the negative pressure holes 17 are connected to the vacuum to suck the bottom of the plastic film 5.2. After the film tearing is completed and the vial matrix is pushed away by the rear push plate 16, the bottom film is exposed. The negative pressure holes 17 disconnect the vacuum, and the second driving mechanism (or the manipulator) drives the suction cup group 18 to descend to adsorb the bottom film. Then the second driving mechanism drives the suction cup group 18 to rise and translate. After reaching the predetermined position, the suction cup group 18 disconnects the vacuum and releases the bottom film.

[0048] The working principle of this embodiment is:

[0049] The front-end device pushes the vial film package 5 to the film tearing station 13 of the bottom plate 2, and the vials in the vial film package 5 have their bottle mouths facing downwards;

[0050] The lifting plate 15 rises, and the rear push plate 16 pushes the vial film package 5 forward to apply pressure to the vial film package 5 in the front-rear direction; the clamping cylinder operates, and the backing plate 4 applies a certain pressure to the vial film package 5 from both sides. The pressure applied from all around can improve the stability of the vial array 5.1 during the film tearing process;

[0051] Raise the tool 7 so that the top of the tool 7 pierces the plastic film 5.2 at the bottom of the vial film package 5, and finally cut out a bottom film of a certain size at the bottom of the vial film package 5, and the contour of the bottom film corresponds to the contour of the tool 7;

[0052] The first driving mechanism of the film tearing suction cup 6 operates to lower the film tearing suction cup 6 and adsorb it on the top surface of the vial film package 5. After stable adsorption, the film tearing suction cup 6 shakes horizontally for a period of time to loosen the upper film, and then raises the film tearing suction cup 6 to separate the upper film from the vial array 5.1. After that, the first driving mechanism operates to move the film tearing suction cup 6 horizontally. After moving the upper film out of the film tearing station 13, the film tearing suction cup 6 releases the upper film;

[0053] The lower suction cup 10 rises, uses the lower suction cup 10 to adsorb on the bottom surface of the bottom film. After stable adsorption, the lower suction cup 10 descends, and the bottom film detaches from the through hole 11 from the vial array 5.1 and reaches below the bottom plate 2. After that, the lower suction cup 10 releases the bottom film, and the bottom film is removed by using a manipulator or removed by using air flow (nozzle jet or suction nozzle suction);

[0054] Alternatively, use the negative pressure hole 17 to adsorb the bottom surface of the bottom film. After the upper film detaches and the vial array 5.1 is pushed out of the film tearing station 13 by the push plate, the bottom film is exposed. The negative pressure hole disconnects the vacuum, the suction cup group 18 descends and adsorbs the top surface of the bottom film. After that, the second driving mechanism or the manipulator operates to raise and translate the suction cup group 18, and finally remove and release the bottom film.

[0055] The above-mentioned first driving mechanism, second driving mechanism and third driving mechanism are all prior arts and are omitted in the figure. For example, existing mechanisms such as a multi-degree-of-freedom manipulator or an XZ slide can be used.

[0056] The above are only the preferred embodiments of the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A film tearing device, characterized in that: include: The bottom plate (2) is fixed on the frame (1) and is used to support the film package (5) of the vial, and one section of the bottom plate is used as the film tearing station (13); the cutter (7) is arranged at the lower side of the film tearing station (13) and is driven by the first lifting mechanism to achieve up and down lifting; the cutter (7) is provided with two longitudinal cutters (7.1) and two transverse cutters (7.2), each longitudinal cutter (7.1) extends along the gaps between the bottle mouths of two rows of vials in the longitudinal direction of the vial array (5.1), and each transverse cutter (7.2) extends along the gaps between the bottle mouths of two rows of vials in the transverse direction of the vial array (5.1), and the longitudinal cutters (7.1) and the transverse cutters (7.2) intersect to form a closed cutting area; A knife groove (12) is provided at the film tearing station (13) and penetrates the bottom plate (2); the position of the knife groove (12) corresponds to the upper and lower positions of the knife (7), and the contour thereof matches the contour of the knife (7); The film-tearing suction cup (6) is arranged above the bottom plate (2) and is connected to the first driving mechanism. When the first driving mechanism is activated, the film-tearing suction cup (6) is lifted and lowered in the vertical direction and shakes and translates in the horizontal direction.

2. A film tearing device according to claim 1, characterized in that: A through hole (11) is formed on the bottom plate (2) within the contour of the knife groove (12), and a lower suction cup (10) is provided at the through hole (11). The lower suction cup (10) is connected to a second lifting mechanism and is lifted up and down under the drive of the second lifting mechanism. A nozzle (9) connected to an air source is provided below the bottom plate, and the nozzle (9) is arranged toward the lower suction cup (10); or, a suction nozzle connected to a vacuum source is provided below the bottom plate (2), and the suction nozzle is arranged toward the lower suction cup (10); or, a robot arm is provided on the frame, extending from below the bottom plate (2) to within a certain range around the lower suction cup (10).

3. A film tearing device as claimed in claim 2, characterized in that: A group of negative pressure holes (17) connected to a vacuum source are provided on the bottom plate (2) within the contour range of the knife groove (12); a suction cup group (18) driven by a manipulator or a second driving mechanism is provided on the frame; the suction cup group (18) is located above the bottom plate (2); when the second driving mechanism is actuated, the suction cup group (18) is lifted and lowered in the vertical direction and translated in the horizontal direction.

4. A film tearing device according to claim 1, characterized in that: Parallel support plates (4) are provided on both sides of the film tearing station (13), and a passage for the vial film package (5) is provided between the support plates (4). The support plates (4) are connected to the top rod of the clamping cylinder (3), and under the drive of the clamping cylinder (3), the support plates (4) on both sides are relatively close to or away from each other; A slide groove is provided on the bottom plate at the front side of the film tearing station (13), and a lifting plate (15) is installed in the slide groove. The lifting plate (15) is connected to the third lifting mechanism. After the lifting plate (15) is lowered, its top surface is flush with the top surface of the bottom plate; The film tearing station (13) is also provided with a rear push plate (16), which is connected to the third driving mechanism. When the third driving mechanism is activated, the rear push plate (16) is lifted and lowered in the vertical direction and translated in the front and rear directions.

5. A film tearing device as claimed in claim 1, characterized in that: The two longitudinal knives (7.1) are located on both sides of the vial array (5.1) in the longitudinal direction, and each longitudinal knife (7.1) extends along the gaps between the vial openings of the two outermost rows of vials on that side.

6. A film tearing device as claimed in claim 1, characterized in that: The two horizontal blades (7.2) are located on both sides of the vial array (5.1) in the horizontal direction, and each horizontal blade (7.2) extends along the gaps between the vial openings of the two outermost rows of vials on that side.

7. A film tearing device according to claim 1, characterized in that: The four corners of the cutter (7) are each provided with two branches (7.3), a certain angle is formed between the two branches (7.3) and the mouth of at least one syringe bottle can be accommodated.

8. A film tearing device as claimed in claim 1, characterized in that: The tops of the longitudinal blade (7.1) and the transverse blade (7.2) are serrated.

9. A film tearing device as claimed in claim 1, characterized in that: The longitudinal blade (7.1) of the knife (7) extends between the gaps at the bottle mouth in a straight line, a triangular wave, an S-shaped wave or a trapezoidal wave shape.

10. The film tearing device according to claim 1, characterized in that: The transverse blade (7.2) of the tool (7) extends between the gaps at the bottle mouth in the form of a triangular wave, an S-shaped wave or a trapezoidal wave.

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